TM 9-2330-356-14

TECHNICAL MANUAL

OPERATORS, UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT

MAINTENANCE MANUAL

FOR

SEMITRAILER, TANK: 5000 GALLON,

BULK HAUL, SELF LOAD/UNLOAD
M967 (NSN 2330-01 -050-5632)
M967A1 (NSN 2330-01-1 55-0046)
SEMITRAILER, TANK: 5000 GALLON,
FUEL DISPENSING, AUTOMOTIVE
M969 (NSN 2330-01 -050-5634)
M969A1 (NSN 2330-01-1 55-0048)
SEMITRAILER, TANK: 5000 GALLON,
FUEL DISPENSING, UNDER/OVERWING AIRCRAFT
M970 (NSN 2330-01 -050-5635)
M970A1 (NSN 2330-01-155-0047)

This manual and TM 9-2330-356-24P supersede TM 9-2330-356-12&P dated 20 October 1980 and
TM 9-2330-356-34&P dated 1 October 1980 and all changes.

Approved for public release: distribution is unlimited.

HEADQUARTERS, DEPARTMENT OF THE ARMY OCTOBER 1990

TM 9-2330-356-14

FOR FIRST AID INFORMATION, REFER TO FM 21-11.

WARNING

If incorrectly used, this equipment can cause severe injury or death. Those who use and maintain the equipment should
be trained in its proper use and warned of its dangers. Read manual before attempting to set up, operate, adjust, or
service the equipment.

WARNING

Frequent inspection of equipment, safety devices, and working areas must be performed to ensure personal and
operational safety and to correct potential or actual hazards.

WARNING

The semitrailer must not be operated if any of the following conditions exist:
Fuel leaks.
Damage to lighting fixtures, wiring, or electrical conduits or lights inoperative.
Damage to towing vehicle or semitrailer.
Primary or parking brake systems inoperative.
Vents plugged, inoperative, or removed. Pressure, vacuum, and fusible vents are installed to meet code require-
ments and protect the semitrailer from damage. A plugged or inoperative vent can cause extensive shell damage
if design pressure or vacuum is exceeded. The fusible vents are designed to operate at high temperatures. If these
vents are coated with paint, dirt, or other foreign material, the temperature when relief occurs maybe greatly
increased.

WARNING

Dry cleaning solvent P-D-680 is toxic and flammable. Always wear protective goggles and gloves, and use only in a
well-ventilated area, Avoid contact with skin, eyes, and clothes, and DO NOT breathe vapors. DO NOT use near open
flame or excessive heat. The solvents flash point is 100F-138F (38C-59C). If you become dizzy while using cleaning
solvent, immediately get fresh air and medical help. If solvent contacts eyes, immediately wash your eyes with water and
get medical aid.

WARNING

Compressed air used for drying or cleaning purposes must not exceed 30 psi (207 kPa). Wear protective clothing (goggles
and gloves) and use caution to avoid injury to personnel.

WARNING

Carbon monoxide can be deadly, DO NOT operate engine in an enclosed area unless it is adequately ventilated.

WARNING

Carbon monoxide is a colorless, odorless, and deadly poisonous gas which occurs in the exhaust fumes of the auxiliary
power engine. Exposure to air contaminated with carbon monoxide produces symptoms of headache, dizziness, loss of
muscular control, apparent drowsiness, and coma. Permanent brain damage or death can result from severe exposure to
carbon monoxide gas.

a
 TM 9-2330-356-14
C3

CHANGE HEADQUARTERS
DEPARTMENT OF THE ARMY
NO. 3 Washington D.C., 3 June 1993

OPERATORS, ORGANIZATIONAL, DIRECT SUPPORT, AND

GENERAL SUPPORT MAINTENANCE MANUAL

SEMITRAILER, TANK: 5000 GALLON,

BULK HAUL, SELF LOAD/UNLOAD
M967 (NSN 2330-01-050-5632)
M967A1 (NSN 2330-01-155-0046)

SEMITRAILER, TANK: 5000 GALLON,

FUEL DISPENSING, AUTOMOTIVE
M969 (NSN 2330-01-050-5634)
M969A1 (NSN 2330-01-155-0048)

SEMITRAILER, TANK: 5000 GALLON,

FUEL DISPENSING, UNDER/OVERWING AIRCRAFT
M970 (NSN 2330-01-050-5635)
M970A1 (NSN 2330-01-155-0047)

Current as of

TM 9-2330-356-14, October 1990, is changed as follows:

1. Remove old pages and insert new pages.

2. New or changed material is indicated by a vertical bar in the margin and by a vertical bar adjacent to the TA number.

Remove Pages Insert Pages

1-13 and 1-14 1-13 and 1-14

2-3 and 2-4 2-3 and 2-4
3-3 thru 3-14 3-3 thru 3-14
3-17 thru 3-20 3-17 thru 3-20
4-11 thru 4-14 4-11 thru 4-14
4-73 thru 4-94 4-73 thru 4-94
4-99 thru 4-110 4-99 thru 4-110
5-13 thru 5-22 5-13 thru 5-22
6-1 thru 6-6 6-1 thru 6-6
E-3 and E-4 E-3 and E-4
Index 1 thru Index 6 Index 1 thru Index 6
Index 13 thru Index 16 Index 13 thru Index 16

File this change sheet in front of the publication for reference purposes.

Approved for public release; distribution unlimited.

By Order of the Secretary of the Army:
GORDON R. SULLIVAN
General, United States Army
Chief of Staff

Official:

MILTON H. HAMILTON
Administrative Assistant to the
Secretary of the Army
04475
Distribution:
To be distributed in accordance with DA Form 12-39-E, Block 0788, requirements for
TM 9-2330-356-14.
 TM 9-2330-356-14
C2

CHANGE HEADQUARTERS
DEPARTMENT OF THE ARMY
NO. 2 Washington D.C., 1 June 1993

OPERATORS, ORGANIZATIONAL, DIRECT SUPPORT, AND

GENERAL SUPPORT MAINTENANCE MANUAL

SEMITRAILER, TANK: 5000 GALLON,

BULK HAOU, SELF LOAD/UNLOAD
M967 (NSN 2330-01-050-5632)
M967A1 (NSN 2330-01-155-0046)

SEMITRAILER, TANK: 5000 GALLON,

FUEL DISPENSING, AUTOMOTIVE
M969 (NSN 2330-01-050-5634)
M969A1 (NSN 2330-01-155-0048)

SEMITRAILER, TANK: 5000 GALLON,

FUEL DISPENSING, UNDER/OVERWING AIRCRAFT
M970 (NSN 2330-01-050-5635)
M970A1 (NSN 2330-01-155-0047)

Current as of
TM 9-2330-356-14, October 1990, is changed as follows:

1. Remove old pages and insert new pages.

2. New or changed material is indicated by a vertical bar in the margin of the page.

Remove Pages Insert Pages

4-109 and 4-110 4-109 and 4-110

3. File this change sheet in front of the publication for reference purposes.

Approved for public release; distribution unlimited.

By Order of the Secretary of the Army:
GORDON R. SULLIVAN
General, United States Army
Chief of Staff

Official:

MILTON H. HAMILTON
Administrative Assistant to the
Secretary of the Army
04471
Distribution:
To be distributed in accordance with DA Form 12-39 requirements for TM 9-2330-356-14.
CHANGE TM 9-2330-356-14
NO 1 C1

HEADQUARTERS
DEPARTMENT OF THE ARMY
ARMY Washington D.C., 26 June 1992

Operators, Unit, Direct Support and General Support

Maintenance Manual
For
Semitrailer, Tank: 5000 Gallon
Bulk Haul, Self-Load/Unload
M967 (NSN 2330-01450-5632)
M967A1 (NSN 2330-01-155-0046)

Semitrailer, Tank: 5000 Gallon

Fuel Dispensing, Automotive
M969 (NSN 2330-01-050-5634)
M969A1 (NSN 2330-01-155-0048)

Semitrailer, Tank: 5000 Gallon

Fuel Dispensing, Under/Overwing Aircraft
M970 (NSN 2330-01-050-5635)
M970A1 (NSN 2330-01-155-0047)

TM 9-2330-356-14, 26 October 1990, is changed as follows:

1. Remove old pages and insert new pages.

2. New or changed material is indicated by a vertical bar in the margin of the page.

Remove Pages Insert Pages

f through h/ (i Blank) f through h/ (i Blank)
2-5 and 2-6 2-5 and 2-6
2-19 and 2-20 2-19 and 2-20
4-101 and 4-402 4-101 and 4-402
4-115 and 4-116 4-115 and 4-116
8-15 and 8-16 8-15 and 8-16

3. File this change sheet in front of the publication for reference purpose.

Approved for public release; distribution is unlimited.

By Order of the Secretary of Army

GORDON R. SULLIVAN
General, United States Army
Chief of Staff

Official:

MILTON H. HAMILTON
Administrative Assistant to the
Secretary of the Army
01789

Distribution:
To be distributed IAW DA Form 12-39-E (block 788), Operator, Unit, Direct Support and General
Support maintenance requirements for TM92330-356-14.
 TM 9-2330-356-14

WARNING

Be sure that grounding connections are made properly and firmly before any fueling operations begin. This will ensure
that grounding connections will not release, thus climinating the possibility of sparks caused by static electricity which will
ignite the fuel. This applies to top loading and bottom loading at a fixed loading facility. Bottom loading is the preferred
method when facilities are available.

WARNING

Grounding cable must be connected before any servicing operations. The first clip should be attached to the ground rod.
The second clip should be attached to the aircraft grounding fitting, if one is provided, or to a convenient unpainted metal
point on the aircraft. Grounding should not be made to a propeller, radio antenna, or highly stressed components of the
landing gear where scratches could cause metal failure. Always disconnect the grounding clips in reverse order, first the
aircraft, then the ground rod. The grounding cables shall be disconnected only after fuel servicing operations have been
completed and all dispensing nozzles and hoses have been disconnected or removed from filler openings and stowed on
the refueling vehicle. Grounding cables attached to dispensing nozzles maybe disconnected only after nozzles have been
disconnected or removed from filler openings of aircraft being serviced.

WARNING

GROUND AIRCRAFT OR VEHICLE TO SEMITRAILER

Grounding of the semitrailer to aircraft or vehicle while refueling is mandatory, regardless of the amount of fuel to be
dispensed, due to the dangers of static electricity.

Bond the fuel nozzle to the aircraft before opening the filler cap. Connect closed circuit nozzles securely before
beginning fuel flow. Electrical hazards may be introduced in several ways, such as:

Electrostatic sparks.

Operating aircraft engines, auxiliary power units and heaters.

Operating automotive or other internal combustion engines servicing equipment in the vicinity.

Arcing of electrical circuits.

Open flames.

Energy from energized equipment.

Lightning.

WARNING

Before performing maintenance on semitrailer, semitrailer must be grounded to an approved (earth) ground and it must
be safe to proceed. Failure to follow this warning may cause a spark to ignite, resulting in serious injury or death to
personnel.

WARNING

DO NOT let go of static reel cable when rewinding until ball stop is firmly touching the reel. Failure to follow this warning
may cause injury to personnel.

b
TM 9-2330-356-14

WARNING

DO NOT paint the semitrailers grounding studs. To ensure safe operation of fuel handling equipment, proper bonding
and grounding connections must be made to clean, unpainted surfaces. Failure to follow this warning may result in injury
or death to personnel.

WARNING

Follow all fuel handling procedures precisely to prevent injury or death to personnel,

WARNING

All fueling/defueling operations must be performed outside.

WARNING

Should an emergency arise requiring entry into a tank which is not vapor-free, or which has an oxygen content less than
19.5%, personnel who enter tank shall have an attached lifeline and wear protective respiratory equipment in the form of
either a self-contained breathing apparatus or a full facepiece with a pressure supply of respirable air. Another person
also provided with respiratory equipment shall be stationed at the manhole opening and remain thereto watch personnel
in the tank and to summon assistance if a rescue operation becomes necessary. Personnel SHOULD NOT enter a tank
which is in the explosive range.

WARNING

Before and after all fuel servicing operations, all valves are to be in the closed position. Failure to follow this warning
could result in excessive spillage and create a fire hazard.

WARNING

DO NOT permit automotive equipment, other than that performing the fuel servicing functions, to be within 50-feet of
the aircraft during fuel servicing operations.

WARNING

When semitrailer is emptied of fuel, a mixture of vapor and air remains that maybe, and often is, within the flammable
range. Refilling the trailer with a different type of fuel other than it originally contained can cause a potential explosive
atmosphere within the trailer. Know what fuel was previously carried so t hat preventive measures may be taken to ensure
that injurious or explosive fumes are not released. Failure to follow this warning may result in serious injury or death to
personnel.

WARNING

DO NOT fuel aircraft with any of its engines running. Fire could result.

WARNING

DO NOT attempt aircraft fueling operations if combustion heaters (e.g., wing and tail surface heater, integral cabin
heaters) are being operated on the aircraft.

c
 TM 9-2330-356-14

WARNING

When falling tank by means of bottom loading, defueling (M970 or M970A1), or self-loading, a test of the precheck system
is mandatory. If this system is not functioning, stop all operations. Determine the problem and have it corrected by a
qualified technician. Failure of automatic shutoff to function may result in uncontrolled fuel spillage and danger of fire
and explosion.

WARNING

When top loading through fill cover, there is no automatic shutdown. Man the loading hose to avoid fuel spillage. Use
capacity indicator gage and dipstick gage to determine amount of fuel loaded. Failure to follow this warning may result in
uncontrolled fuel spillage and a fire or explosion hazard.

WARNING

DO NOT mix incompatible fuels in tank. Dangerous fumes and explosion may result. Know what fuel was previously
carried so that preventive measures maybe taken to ensure that injurious or explosive fumes are not released. Failure to
follow this warning may result in injury or death to personnel.

WARNING

In an emergency, close valve A or pull emergency valve shutoff on opposite side of semitrailer.

WARNING

Operators must be alert for leaking or malfunctioning equipment. Stop all servicing operations immediately at the first
sign of leaks or malfunctions. Corrective action must be performed by qualified technicians before resuming any
operations.

WARNING

Parking areas for fuel servicing vehicles should be arranged to:

Facilitate dispersal of vehicles in event of an emergency.
Provide at least 10-feet of clear space between vehicles for accessibility for fire control purposes.
Prevent any vehicle from draining into an adjacent building.
Provide at least 50-feet distance from any structure housing the public, that may have windows or doors in ex-
posed walls.

WARNING

All vapor-freeing work by any method should be carried on outdoors, remote from vehicles and other known sources of
ignition, and the tank unit must be stationed where flammable vapors will not blow or drift indoors. Failure to follow this
warning may result in serious injury or death to personnel.

WARNING

Combustible vapor testing must be conducted as prescribed in this manual and current technical bulletins and field
manuals. Vapor testing should not be conducted during steam cleaning since excess moisture or lack of oxygen may cause
false readings.

d
TM 9-2330-356-14

WARNING

Servicing the semitrailer when connected to the towing vehicle, regardless of the nature of the repair, the following
should be done:
The tractor engine should be shut down.

The tractor parking brakes should be applied.

The tractor ignition key should be removed and in the hands of the operating technician, or locked in an
area away from the vehicle.

WARNING

Before performing repairs to these semitrailers involving welding, torching, grinding, chipping, or any other operation
that would possibly create a spark, a thorough purging of all components in contact with the product or vapors is a must.
All components that cannot be cleaned must be removed from unit; all gages should be removed before purging. A meter
check for any combustion material after purging must be made before performing any work, and every 2 hours after that.

WARNING

The following steps must be followed if semitrailer is to be moved to the inside of a building:

1. Drain tank completely and purge.

2. Check interior of tank with explosive meter prior to moving into building.

3. Use explosive meter to check tank prior to starting work each day and perform random checks during the day.
4. No open flames, welding, or use of heat producing devices permitted near tank during maintenance unless
tank tests safe with explosive meter.
5. No smoking within 50-feet of vehicle at any time.

WARNING

DO NOT climb into tank unless interior of tank has been drained and purged and an explosive meter check indicates that
it is safe to do so. Adequate forced air ventilation or self-contained breathing apparatus must be used. Person entering
tank must have an attached lifeline. An observer must be stationed at the manhole opening so that assistance maybe
summoned in the event of an emergency. Failure to follow this warning may result in serious injury or death to personnel.

WARNING

When troubleshooting an electrical malfunction or performing electrical maintenance, ALWAYS disconnect

intervehicular electrical cable from semitrailer, and negative battery cables at batteries. Failure to follow this warning
may create a spark and explosion, resulting in serious injury and death to personnel.

WARNING

Batteries produce explosive gases. Keep sparks, flame, and smoking material away. Ventilate when charging or using in
an enclosed space. The batteries contain sulfuric acid that causes severe burns. If acid contacts eyes, skin, or clothing,
flush well with water. For contact with eyes, get immediate medical attention. Do not jump start engine. Batteries must
be removed for recharging.

e
 TM 9-2330-356-14

WARNING

115-220 volts can cause personal or death. Take extreme care when working with this much voltage.

WARNING

Check for fuel leaks at gage tube connections before performing electrical testing at control panel. Stop any leaks and
wipe up spills..

WARNING

Hose reel cabinet door on M970 and M970A1 is heavy-use two hands when opening and closing. Use latches to lock
door. DO NOT slam.

WARNING

The M970 and M970A1 Hose reel cabinet door is spring loaded. Hold firmly when opening or closing.

WARNING

With hose pulled from hose reel, the reel is under spring tension. To avoid movement of hose feel by accidental activa-
tion of hose reel rewind switch, tighten hose reel lock. Failure to follow this warning may result in personal injury.a

WARNING

Use extreme caution when operating electric rewind on hose reels. NEVER use the electric rewind on both hose reels at
the same time. Electric rewind should be halted, then resumed carefully as the fuel dispensing nozzle approaches the
vehicle. As the hose becomes fully wound on the hose red, the nozzle may slam against the vehicle with force sufficient
to cause injury to persons and/or damage to equipment. Extreme cam is to be used, ensuring that the hose is rewound
slowly. Caution should be used at the hose reels to prevent accidental tripping of the rewind switches. If these are acci-
dentally depressed by hand or by falling objects, serious injury to persons and/or damage to equipment may occur.

WARNING

DO NOT attempt to repair brake chamber fail-safe unit. It is dangerous because of high spring compression. No repair is
authorized for fail-safe unit.

WARNING

The fail-safe brake chamber power spring musts be manually compressed and the air reservoirs must be vented of pres-
sure before removal of hub and drum assembly.

WARNING

DO NOT crawl underneath, on top, or near the tires of the vehicle unless the brakes are positively locked and all other
people are swam of your presence.

f
TM 9-2330-356-14

WARNING

Release air pressure from both air reservoirs before doing any work on brake lines or other pressurized areas.

WARNING

Due to asbestos hazard, do not grind off brake lining rivet heads. failure to follow this warning may result in serious injury of death
to personnel.

WARNING

Operators must wear ear protection while on engine side of semitrailer with engine running. Failure to follow this warning may
result in injury to personnel.

WARNING

Handle charged fire extinguisher cylinders with care. DO NOT jar or expose to temperature above 140F (60
C).

WARNING

Drain semitrailer tank completely before removing the emergency valve, recirculation adapter, or adapter plate. Excessive
spillage would occur when these items are removed.

WARNING

When adjusting needle valve on 4-inch control valve, do not close needle valve completely. This will prevent 4-inch control
valve from closing at any time during bottom load operations.

WARNING

Spare tire and wheel weighs 190 pounds, Four-person lift, or suitable lifting device, is required.

WARNING

The alternator weighs approximately 25 pounds. Use caution when removing or installing the alternator to avoid injury to
personnel or damage to components.

WARNING

If the spring assembly is seized in spring seat, hack the rear axle higher to lift the spring. Be careful not to lift semitrailer off the
supports under the frame.

WARNING

Ensure that forklift is properly positioned under cabinet. The entire weight of the cabinet is now on the forklift. Failure to
follow this warning may result in cabinet falling and injuring personnel.

g Change 1
 TM 9-2330-356-14

WARNING

DO NOT use acetylene torch to fuse emergency valve control cable ends unless tank has been cleaned and purged. Fail-
ure to follow this warning may result in serious injury or death to personnel.

WARNING

DO NOT allow nozzle spray to contact skin. Diesel fuel under pressure can penetrate flesh and cause serious injury and
infection.

WARNING

Be careful when removing the impeller from the centrifugal pump. The spring load on the mechanical seal may cause the
impeller to fly off the shaft as it is being removed, causing serious injury to personnel.

WARNING

Ladder has narrow tread. Use care when climbing. Failure to follow this warning may result in serious injury or death to
personnel.

Change 1 h/ (i Blank)
 *TM 9-2330-356-14

TECHNICAL MANUAL HEADQUARTERS

NO. 9-2330-356-14 DEPARTMENT OF THE ARMY
Washington D.C., 26 October 1990

OPERATORS, UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT

MAINTENANCE MANUAL

FOR

SEMITRAILER, TANK: 5000 GALLON,

BULK HAUL, SELF-LOAD/UNLOAD
M967 (NSN 2330-01-050-5632)
M967A1 (NSN 2330-01-155-0046)

SEMITRAILER, TANK: 5000 GALLON,

FUEL DISPENSING, AUTOMOTIVE
M969 (NSN 2330-01-050-5634)
M969A1 (NSN 2330-01-155-0048)

SEMITRAILER, TANK: 5000 GALLON,

FUEL DISPENSING, UNDER/OVERWING AIRCRAFT
M970 (NSN 2330-01-050-5635)
M970A1 (NSN 2330-01-155-0047)

REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS

You can help improve this manual. If you find any mistakes, or if you know of a way to improve the proce-
dures, please let us know. Mail your letter, DA Form 2028 (Recommended Changes to Publications and
Blank Forms), or DA Form 2028-2 located in the back of this manual direct to: Commander, U.S. Army
Tank-Automotive Command, ATTN: AMSTA-MB, Warren, MI 48397-5000. A reply will be furnished to
you.

TABLE OF CONTENTS
Paragraph Page

Chapter 1. INTRODUCTION

Section I. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1 1-1

II. Description and Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7 1-1

Chapter 2. OPERATING INSTRUCTIONS

Section I. Operating Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1 2-1

II. Operation of Auxiliary Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8 2-5
III. Operation Under Unusual Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-20 2-53

This manual and TM 9-2330-356-24P supersede TM 9-2330-356-12&P dated 20 October 1980 and TM 9-2330-356-34&P
dated 1 October 1980 and all changes.

i
TM 9-2330-356-14

TABLE OF CONTENTS - Continued

Paragraph Page

Chapter 3. OPERATOR/CREW MAINTENANCE INSTRUCTIONS

Section I. Lubrication Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1 3-1

II. Preventive Maintenance Checks and Services (PMCS) . . . . . . . . . . . . . . . . . . . 3-2 3-21
III. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4 3-28
IV. Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5 3-34
Chapter 4. UNIT MAINTENANCE INSTRUCTIONS

Section I. Service Upon Receipt of Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1 4-1

II. Repair Parts, Special Tools, and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . .4-2 4-2
III. Preventive Maintenance Checks and Services (PMCS) . . . . . . . . . . . . . . . . . . . 4-5 4-5
IV. Unit Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6 4-9
V. Painting and Stenciling ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7 4-22
VI. Testing the Electrical System with a Multimeter . . . . . . . . . . . . . . . . . . . . . . . . . 4-8 4-29
VII. Maintenance of Chassis Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12 4-36
VIII. Maintenance of Engine Electrical Wiring, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16 4-45
IX. Maintenance of Engine Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 4-59
X. Maintenance of Hose Reel Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27 4-68
XI. Maintenance of Bogie Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28 4-73
XII. Maintenance of Brake System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31 4-74
XIII. Maintenance of Wheels, Hubs, and Drums . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49 4-101
XIV. Maintenance of Frame and Towing Attachments . . . . . . . . . . . . . . . . . . . . . . . 4-51 4-110
XV. Maintenance of Tank Body Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-56 4-114
XVI . Maintenance of Body Accessory Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-62 4-120
XVII. Maintenance of Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-69 4-121
XVIII. Maintenance of Filter/Separator and Sump Components
(M969, M969A1, M970, and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-83 4-139
XIX. Maintenance of Dispensing Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-85 4-141
XX. Draining and Purging of Tank Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-99 4-166
XXI. Preparation for Storage or Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-104 4-170

Chapter 5. DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

INSTRUCTIONS

Section I. Repair Parts, Special Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1 5-1

II. Direct Support and General Support Troubleshooting . . . . . . . . . . . . . . . . . . . . 5-4 5-3
III. General Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7 5-11
IV. Removal and Installation of Major Components . . . . . . . . . . . . . . . . . . . . . . . . 5-10 5-14

Chapter 6. REPAIR OF FRAME AND BODY PARTS

Section I. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1 6-1

II. Body Assembly and Suspension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3 6-1

ii
 TM 9-2330-356-14

TABLE OF CONTENTS - Continued

Paragraph Page

III. Brakes and Brake System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6 6-4

IV. Frame and Body Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11 6-7

Chapter 7. REPAIR OF ENGINE ASSEMBLY

Section I. Description and Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1 7-1

II. Removal and Installation of Major Components . . . . . . . . . . . . . . . . . . . . . . . . 7-11 7-10
III. Repair Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-61 7-36
IV. Test and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-80 7-62

Chapter 8. REPAIR OF PUMP, VALVES, AND DISPENSING EQUIPMENT

Section I. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1 8-1

II. Centrifugal Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3 8-1
III. Hose Reels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . .8-5 8-7
IV. Meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-7 8-15
V. Emergency Valve Vent and Float Assembly . . . . . . . . . . . . . . . . . . . . . . . . . .8-8 8-16
VI. Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10 8-20
VII. Nozzles and Couplings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22 8-33

Appendix A. REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Appendix B. MAINTENANCE ALLOCATION CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

Appendix C. COMPONENTS OF END ITEM AND BASIC ISSUE ITEMS LISTS . . . . . . C-1

Appendix D. ADDITIONAL AUTHORIZATION LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1

Appendix E. EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST . . . . . . . . . . E-1

Appendix F. TORQUE LIMITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index 1

iii/(iv Blank)
 TM 9-2330-356-14

CHAPTER 1
INTRODUCTION

Section I. GENERAL

1-1. Scope 1-4. Destruction of Army Materiel to Prevent

Enemy Use
This manual is for your use in operating and maintaining
the M967, M967A1, M969, M969A1, M970, and M970A1 Refer to TM 750-244-6 for information and instructions on
5000 gallon fuel tank semitrailers. It also includes destroying this equipment.
references, components of end item lists, an additional
authorization list, a maintenance allocation chart, and an 1-5. Reporting of Equipment Improvement
Recommendations (EIRs)
expendable supplies and materials list.
If your semitrailer needs improvement, let us know. Send
1-2. Maintenance Forms and Records us an EIR. You, the user, are the only one who can tell us
what you dont like about your equipment. Let us know
Equipment maintenance forms and procedures for their why you dont like the design. Tell us why a procedure is
use are contained in DA Pam 738-750, The Army hard to perform. Put it on an SF 368 (Quality Deficiency
Maintenance Management System (TAMMS). Report). Mail it to: Commander, U.S. Army
Tank-Automotive Command, ATTN: AMSTA-MP,
Warren, MI 48397-5000. A reply will be furnished to you.
1-3. Preparation for Storage or Shipment
1-6. Quality Assurance/Quality Control (QA/QC)
For information on preparing the M967, M967A1, M969,
M969A1, M970, and M970A1 semitrailers for storage or Quality assurance inspections shall be performed in
shipment, refer to Chapter 4, Section XXI. accordance with requirements in TM 750-245-4.

Section II. DESCRIPTION AND DATA

1-7. Description (Figs. 1-1 through 1-11) d. Common Equipment. Each model is equipped with
pressure and vacuum vents, hose troughs, sealed
a. Basic Configuration. These trailers are designed to manhole, calibrated gage, bulk fuel hoses, portable
bestowed by a truck tractor equipped with a fifth wheel. grounding rod, static reel, and spare tire. A ladder is
Authorized 5-ton truck tractors arc the M52A2, M818, provided at the front of the M967, M969, and M970, and at
M931, M931A1, M932, and M932A1. When driving on the rear of the M967A1, M969A1, and M970A1
hard surface highways only, the 10-ton military-adapted semitrailers for access to the top manhole. A vapor
recovery system, required in certain ecological areas, can
commercial 6 x 4 truck tractors, M915 and M915A1, are
be installed on all models (para 1-9).
also authorized. Construction and basic configuration of
the M967, M967A1, M969, M969A1, M970, and M970A1
are the same except for dispensing equipment, new bogie, e. Components. The maintenance paragraphs of this
braking system, and functional use. manual contain a detailed description of the components.
Differences between models, if pertinent, are included.

b. Common Operations. All six models, M967, 1-8. Differences Between Models (Figs. 1-1
M967A1, M969, M969A1, M970, and M970A1 can be through 1-11)
loaded through the bottom or through the top fill opening.
The 4-cylinder diesel engine and pump assembly provide
a. M967and M967A1. These models are 5000 gallon
self-load/unload capability.
bulk haul, self-load/unload semitrailers equipped primari-
ly for bulk delivery of fuel. These models do not have the
c. Construction. The trailer has a stainless steel, dispensing capability of the M969, M969A1, M970, and
single compartment tank of 5000 gallon capacity, plus 3% M970A1 semitrailers. The M967 and M967A1 have a
capacity for product expansion. The chassis is constructed 4-cylinder diesel engine and a 4-inch centrifugal pump.
of welded steel and is equipped with full floating tandem The self priming, low-head pump provides a self-load rate
axles and manually operated landing gear. of up to 300 gpm and a bulk delivery rate of up to 600 gpm.

1-1
 TM 9-2330-356-14
Figure 1-1.
1-2
TM 9-2330-356-14
Figure 1-2
1-3
 TM 9-2330-356-14
Figure 1-3.
1-4
TM 9-2330-356-14
Figure 1-4.
1-5
TM 9-2330-356-14
Figure 1-5.
1-6
TM 9-2330-356-14
Figure 1-6.
1-7
TM 9-2330-356-14
Figure 1-7.
1-8
TM 9-2330-356-14
Figure 1-8.
1-9
TM 9-2330-356-14
Figure 1-9.
1-10
TM 9-2330-356-14
Figure 1-10
1-11
TM 9-2330-356-14
Figure 1-11.
1-12
 TM 9-2330-356-14

b. M969 and M969A1. These models are 5000 gallon During vehicle production, the following kits have
fuel dispensing semitrailers used primarily for automotive been installed to the M970 Marine Corps vehicle:
refueling. These models can also be used for overwing
aircraft refueling. The M969 and M969A1 have the same (1) Defueling Kit (Modification Kit. Engine
bulk delivery and self-load capabilities as the M967 and Accessories). NSN 2910-01-093-7965, Part Number AE20074-
M967A1. Additional equipment includes a filter/ 008, GAGE 00624.
separator and dual dispensing system. Each dispensing
system includes a meter. hose reel with electric rewind (2) Flow Limiter Assembly. For 1 1/2-in. hose.
Stored in the tool box. NSN 3835-01-101-7432, Part Number
50-feet of 11/4-inch dispensing hose, and a dispensing
GTP 1540, CAGE 32218.
nozzle. Flow rate for metered delivery of fuel (gasoline or
diesel) is up to 60 gpm-through one nozzle only, or (3) Vapor Recovery Kit. NSN 2590-00-138-8434,
through both nozzles at the same time. Part Number 1168 5993, CAGE 19207. Figure 102.
c. M970 and M970A1. These models are 5000 gallon g. M970 (Marine Corps). These models (SN TC 0843,
fuel dispensing semitrailer designed for under/overwing TC-0844, and TC-103 thru TC-178) built under contract number
refueling of aircraft. They use the same engine as the DAAE07-C-89-J020 have incoraporated the M970A1 dolly.
M967, M967A1, M969, and M969A1, but have a 3-inch The affected are noted in the repair parts and special tools list.
high pressure centrifugal pump. Additional equipment
includes a filter/separator, recirculation system, and two 1-9. Vapor Recovery Kit
refueling systems-one each for undewing and overwing
servicing. a Description. The system consists of vaportight tine
running from a sealed hood on the emergency valve vent
(1) Recirculation System. This system provides (directly behind manhole cover) to the tear of the tank. The
rollover rail on the roadside of the semitrailer is used as part of
fuel sampling and complete recirculation of fuel through the line. The adapter on the end of the lines in compatible with
the filtering and dispensing system to remove the 4-inch quick disconnect vapor recovery connections at a
condensation and contamination. majority of fuel depots.
(2) Underwing Refueling System. This system b. Use. The vapor recovesy system can be installed on all
includes 50-feet of 2 1/2-inch hose, electric-rewind hose models and is required in certain ecological areas.
reel, single point dispensing nozzle, breakaway fitting on
the hose reel, and deadman control. (1) The system allows after a fuel depot to collector recover
the vapors and gases that are present during the loading
(3) Overwing Refueling System. This assembly is operations.
part of the above assembly and includes these additional (2) Vapors and gases can also be cycled back to the
components: 50-feet of 1 1/2-inch dispensing hose, overwing semitrailer through the recovery system during unloading
dispensing nozzle, and hose reel with electric-rewind. A operations.
small closed-circuit dispensing nozzle (interchangeable
with the ovenwing nozzle) is also provided for underwing 1-10. Tabulated Data
(helicopter) refueling.
Angle of departure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
..
d. Upgrades to M967, M969, M970. A new fuel
dispensing nozzle, hose trough cover, control panel cover, Bridge Classification, M967, M967A1:
rear ladder. front and rear drain, and tachometer and lead Empty weight with tractor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class. 13
assembly have been introduced for repairing or upgradeing Empty weight without tractor . . . . . . . . . . . . . . . . . . . . . . . . . . . Class. 6
these three models. A new hose reel cabinet door has
been introduced for upgrading model M969. Cross-country loaded with
tractor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class.
.. 25
e. M967A1, M969A1, M970A1 including M970 SNTC- Cross-country loaded without
0843, TC-0844, and TC-103 thru TC-178. These models are tractor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Class.
.. 18
the same as models M967, M969, and M970, except for an Highway loaded with tractor . . . . . . . . . . . . . . . . . . . . . . . . . . Class. 29
elastomeric-type drive coupling between the fuel dispensing Highway loaded without tractor . . . . . . . . . . . . . . . . . . . .. Class. 21
pump and the engine assembly. A new axle, bogie, and
braking system with a S-type cam brake actuating Bridge Classification, M969, M969A1:
mechanism have been installed on these models. Empty weight with tractor . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Class. 14
Empty weight without tractor . . . . . . . . . . . . . . . . . . . . . . . . . . . Class. 6
f. M970 (Marine Corps). These models, built under Cross-country loaded with
Contract Numbers DAAE07-85-C-J044 and DAAE07-89- tractor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C . lass. 25
C-J020, have incorporated the M970A1 dispensing pump, Cross-country loaded without
pump coupling, and control panel cover. These items are tractor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Class.
.. 18
called out in the repair parts and special tools list figures 113, Highway loaded with tractor . . . . . . . . . . . . . . . . . . . . . . . . . . Class. 30
116 and 1. Highway loaded without tractor . . . . . . . . . . . . . . . . . . . .. Class. 22

Change 3 1-13
 TM 9-2320-356-14

Bridge Classification, M970, M970A1: Semitrailer Tank Model Nos.

Empty weight with tractor . . . . . . . . . . . . . . . Class. 15 Bulk haul, self-load/unload
Empty weight without tractor . . . . . . . . . . . . . Class. 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M967, M967A1
Cross-country loaded with Fuel dispensing, automotive
tractor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class. 26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M969, M969A1
Cross-country loaded without Fuel dispensing under/ovenwing aircraft
tractor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class. 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M970, M970A1
Highway loaded with tractor . . . . . . . . . . . . . Class. 30
Highway loaded without tractor . . . . . . . . . . Class. 22 Tires:
Quantity (including spare) . . . . . . . . . . . . . . . . . . . . . . 9
Type . . . . . . . . . Military nondirectional, cross-country
NOTE Size. . . . . . . . . . . . . . . . . . . . . . . 11.00 x 20-12 ply rating
Tube equipped . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Yes
Slope over 10%, slight leakage may occur. If
slope over 10% anticipated, reduce payload Tire Pressures:
to 3800 gallons. Cross-country and sand . . . . . . . . . . . . . . . . . . . ..40 psi
Hard surface roads . . . . . . . . . . . . . . . . . . . . . . . . . 60 psi

Towing Facility . . . . . . . . . . . . . . . . . . . . . . . . . . . . Kingpin

Capacities of Tank (Vehicle Capacity):
Hard surface road and Towing Vehicle (Prime Mover):
cross-country . . . . . . . . . . . . . . . . . . . . . . . . . 5000 gal. 5-ton . . . . . . . . . . . . . . . . . . . . . . . M52A2, M818, M931,
20% maximum side slope M931A1, M932, and M932A1
without leakage . . . . . . . . . . . . . . . . . . . . . . 5000 ga1. 10-ton (hard surface
10% maximum longitudinal slope highway only) . . . . . . . . . . . . . .. M915 and M915A1
without leakage . . . . . . . . . . . . . . . . . . . . . . 5000 gal.
Track
(Center to center of dual wheels . . . . . . . . . . . . . 72 in.
Center of Gravity:
Empty (vertical) . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 in. Transfer Hose:
Empty (horizontal from kingpin) . . . . . . . . . . . . 198 in. Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flexible
Loaded (vertical) . . . . . . . . . . . . . . . . . . . . . . . ..66.5 in. Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Trough
Loaded
(horizontal from kingpin) . . . . . . . . . . . . . . . .170 in. Axles (M967, M969, and M970 except M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178):
Dimensions Overall: Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Full floating tandem
Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCD-5-32791 (rear)
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 1/2 in. SCD-5-32791-A (front)
Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 366 in. Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14,000 lb.
Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 in.
To outside of tires . . . . . . . . . . . . . . . . . . . . . . . . . 973/4 in. Axles and Suspension
Weights: (M967A1, M969A1, and M970A1 including M970 SN
M967 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Empty: .. 13,000 lb. TC-0843, TC-0844, and TC-103 thru TC-178):
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loaded:
. . 46,950 lb. Axle Model Number. . . . . . . . . . . . . . . . . . . . .A21T-7CT7R-DW10A
M967A1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Empty: .. 13,745 lb. Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25,000 lb.Suspension
M969 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Empty: .. 15,000 lb. Model Number. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H900-50
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Loaded:
. 48,950 lb. Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tandem overslung axle
M969A1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Empyt: .. 15,580 lb.
M970 except M970 SN TC-0843, TC-0844, Springs:
and TC-103 thru TC-178 . . . . . . . . . . . . . . . . .Empty: 15,200 lb. Type. . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . Semi-elliptic multi-leaf
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loaded:
.. 49,150 lb. Shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Semi-elliptic
M970A1 including M970 SN TC-0843, TC-0844,
and TC-103 thru TC-178 . . . . . . . . . . . . . . . Empty: 15,460 lb. Brakes (M967, M969, and M970 except M970 SN
Ground Clearance: TC-0843, TC-0844, and TC-103 thru TC-178):
M970 SN TC-0843, TC-0844, TC-103
thru TC-178 only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 . . in. Quantity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 sets
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fail-safe
Kingpin Location: Actuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Full air-wedge type
From nose of vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 . in. Operation pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75-95 psi
To landing gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 . . in.
Brakes (M967A1, M969A1, and M970A1 including M970
Portable Fire Extinguisher. SN TC-0843, TC-0844, and TC-103 thru TC-178):
Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Purple-K, dry chemical Quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 sets
Size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . .10 lb. Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fail-safe ..
No. per vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2. . Actuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Full air S-type cam
Operating pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75-95 psi

1-14 Change 3
 TM 9-2330-356-14

Deadman Control (Underwing): Single Point, Pressure Shut-off with Deadman

(M970, M970A1 Only) Controls:
Size and Material . . . . . . . . . . . . . . . . 3-inch aluminum Nominal size . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21/2 in.
Function . . . . . . . . . Underwing/recirculation/purge/
Drain Valve: self-load/defueling
Working pressure . . . . . . . . . . . . . . . . . . . . . . . ..120 psi Quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300 gpm
Closed Circuit Pressure Shut-off
Electrical System Engine: Nominal size . . . . . . . . . . . . . . . . . . . . . . . . . . . 11/2 in.
Type . . . . . . . . . . . . . . . . . . . . . . . . . . .12V direct current Function . . . . . . . . . . . . . . . . . . . . . . . Helicopter only
Alternator (Model A001-2300JB) . . . . . . . . . 65 amps, Quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1
belt drive Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100 gpm
Battery (2) . . . . . . . . . . . . . . 12V, connected in parallel
Fuel Dispensing Hose (Automotive,
Electrical SystemVehicle: Overwing, M969, and M969A1):
Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24V Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 ft.
Quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1
Nominal size . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 /4 in.
Lamps:
Clearance lights . . . . . . . . . . . . . . . . . . . . . . . . . . ..3 CP Fuel Dispensing Hose
Taillights (service) . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 CP (Overwing, M970 and M970A1):
Taillights (blackout) . . . . . . . . . . . . . . . . . . . . . . . . . 3 CP Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 ft.
Stoplights (service) . . . . . . . . . . . . . . . . . . . . . . . . . 32 CP Quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Nominal size . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11/2 in.
Engine:
Fuel Dispensing Hose
Type . . . . . . . . (Onan) 4 cyl, 4 cycle, diesel, air-cooled
(Underwing, M970 and M970A1):
Model . . . . . . . . . . . . . . . . . . . . . . . . . .. DJC-MS4118W
Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 ft.
Horsepower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27.5
Quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.25
Nominal size . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21/2 in.
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.625
Oil Capacity Crankcase: Bulk Fuel Servicing Hose:
Without filter change (quarts) . . . . . . . . . . . . . . . . . 6 (Two w/male and female connectors,
With oil filter change (quarts) . . . . . . . . . . . . . . . 61/2 One w/female connector, both ends)
Displacement (cu. in.) . . . . . . . . . . . . . . . . . . . . . .120 Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 ft.
Injection (firing) sequence . . . . . . . . . . . . . . . . . 1-2-4-3 Quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Nominal size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 in.
Throttle Control:
Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..100 in. Hose Reels:
Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flexible Type . . . . . . . . . Electric-full control and manual crank
Type . . . . . . . . . . . . . . . . . . Push-pull w/locking handle
Landing Gear:
Type . . . . . . . . . . . . . . . . . . Vertical support w/foot pads
Engine Air Cleaner: Operation . . . . . . . . . . . . . . . . . Hand crank, two-speed
Capacity (Air-flow) . . . . . . . . . . 115 cpm @ 12 in. H 2O
Meter (M969 and M969A1):
Filter/Separator: Quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Construction . . . . . . . . . . . . . . . . . . . . . . . . . Aluminum Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Full metering
Rating. . . . . . . . . . . . . . . . . . . . . . . . . . . 300 gpm 150 psi Maximum capacity . . . . . . . . . . . . . . . . . . . . . . . 100 gpm
Differential pressure gage psi indicator, 0-25 psid
Meter (M970 and M970A1):
Quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Fuel Dispensing Nozzles: Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Full metering
Trigger Control (used with deadman control on Maximum capacity . . . . . . . . . . . . . . . . . . . . . . . 300 gpm
M970 and M970A1):
1
Nominal size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 /2 in. Pump (4 in. Model) Bulk Haul,
Function . . . . . . . . . . Automotive/overwing/purge with Self-load/unload, Overwing Automotive
adapter (M967, M967A1, M969 and M969A1):
Quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Type . . . . . . . . . . . . . . . . . . . . Low pressure, centrifugal
Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100 gpm Drive . . . . . . . . . . . . . . . . . . . . . . . . . . Shaft from engine

1-15
TM 9-2330-356-14

Pump (3 in. Model) (Underwing/overwing) e. Hose Rewind Plate (M969 and M969A1). Mounted
(M970 and M970A1): in hose reel cabinet on each meter mounting plate.
Type . . . . . . . . . . . . . . . . . High pressure, centrifugal Indicates caution when rewinding hoses.
Drive . . . . . . . . . . . . . . . . . Shaft from engine
f. Hose Rewind Plate (M970 and M970A1). Mounted
Emergency Valve Control: in hose reel cabinet on each meter mounting plate.
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Full release Indicates caution when rewinding hoses.
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . Flexible cable
g. Operating Instructions Plate. Mounted on tool box
1-11. Identification and Instruction Plates cover. Indicates valve positions for various operating
(Figs. 1-12 through 1-16) functions.

a. Vehicle Identification Plate. Mounted on frame on h. Engine Operating Instruction Plate. Mounted on
left side of vehicle. Identifies vehicle model, weight, left side of frame above the control panel. Gives specific
dimensions, vehicle identification number, and contract engine operating instructions.
number.
i. Precheck Operation Plate (M970 and M970A1).
b. D.O.T Data Plate. Mounted on front frame on the Mounted on frame next to control panel. Indicates open
right side between the service brake coupling and the front and closed position of precheck valve.
marker light. Identifies manufacturers serial number,
D.O.T (Department of Transportation) specifications, j. Throttle Plate. Mounted on frame next to control
shell material, head material, welding specification, and panel. Indicates direction to increase and decrease
lining. throttle.

c. Bottom Loading Instruction Plate. Located on left k. Deadman Deactivation Plate (M970 and M970A1).
side of vehicle above the piping control cabinet. Indicates Mounted in hose reel cabinet on meter mounting plate.
instructions for bottom loading. Gives instructions to deactivate deadman control.

d. Flow Rate/RPM Plate. Mounted on left side of l. Vapor Recovery Plate. Mounted on frame on left
frame next to the control panel. Gives maximum gallons side of vehicle in front of ground board. Indicates
per minute at set engine rpm. instructions for vapor recovery operation.

1-16
 TM 9-2330-356-14

Figure 1-12. Identification and Instruction Plates (M967 and M967A1).

1-17
TM 9-2330-356-14

Figure 1-13. Identification and Instruction Plates (M969 and M969A1).

1-18
 TM 9-2330-356-14

Figure 1-14. Identification and Instruction Plates (M969 and M969A1) (Cont).

1-19
TM 9-2330-356-14

Figure 1-15. Identification and Instruction Plates (M970 and M970A1).

1-20
 TM 9-2330-356-14

Figure 1-16. Identification and Instruction Plates (M970 and M970A1) (Cont).

1-21/(1-22 Blank)
 TM 9-2330-356-14

CHAPTER 2
OPERATING INSTRUCTIONS

Section I. OPERATING PROCEDURES

WARNING damage. A plugged or inoperative vent can

cause extensive shell damage if design
pressure or vacuum is exceeded. The fus-
If incorrectly used, this equipment can cause ible vents are designed to operate at high
severe injury or death. Those who use and temperatures. If these vents are coated
maintain the equipment should be trained in with paint, dirt, or other foreign material,
its proper use, should be warned of its the temperature when relief occurs may be
dangers, and should read the entire manual greatly increased.
before attempting to set up, operate, adjust,
or service the equipment.
a. This is a brief service to make sure that the semi-
trailer is ready for operation, and that conditions affecting
2-1. General
the semitrailers readiness have not changed since the
previous after-operation service. The before-operation
This section provides operator/crew instructions for
operation and proper use of the M967, M967A1, M969, services specified in table 3-1, Operator/Crew Preventive
M969A1, M970, and M970A1 semitrailers. Operations Maintenance Checks and Services, Chapter 3, must be
performed before using the semitrailers.
common to all six models are described first, followed by
those operations which pertain to a particular model.
b. You must follow approved practices and
2-2. Before-Operation Service precautions. A detailed study of Section III, Operation
Under Unusual Conditions, is essential for use of this
material under unusual conditions.
WARNING
2-3. Coupling Semitrailer to Towing Vehicle
Frequent inspection of equipment, safety (Figs. 2-1 through 2-3)
devices, and working areas must be per-
formed to ensure personal and operational a. Back the towing vehicle slowly to the front of the
safety and to correct potential or actual semitrailer. Maneuver the towing vehicle so that the
hazards. kingpin on the semitrailer is in line with the fifth wheel
jaws on the towing vehicle. Before the upper coupler
The semitrailer must not be operated if any (kingpin) plate of the semitrailer starts to ride on the fifth
of the following conditions exist: wheel of the towing vehicle, stop the towing vehicle. Make
a. Fuel leaks. sure the kingpin and the fifth wheel are properly alined.
Do not ram tractor into semitrailer pick-up plate. You may
b. Damage to lighting fixtures, wiring or need to raise or lower the landing legs to aline the level of
electrical conduits, or lights inoperative. the semitrailer kingpin plate with the tractor fifth wheel.
Back towing vehicle under upper coupler (kingpin) plate
c. Damage to towing vehicle or semi- until the kingpin and fifth wheel hook automatically.
trailer. Make sure the kingpin and fifth wheel are engaged and
locked.
d. Primary or parking brake systems in-
operative.
b. Remove dummy couplings from the service air
e. Vents plugged, inoperative, or re- couplings and emergency air couplings (fig. 2-1). Couple
moved. Pressure, vacuum, and fusible the towing vehicle air line marked SERVICE and the air
vents are installed to meet code require- line marked EMERGENCY to the semitrailer coupling
ments and to protect the semitrailer from bearing a like tag.

2-1
TM 9-2330-356-14

Figure 2-1. Connections Used in Coupling Semitrailer to Towing Vehicle.

CAUTION

Proper operation of semitrailer primary brake

system is essential for safe operation of ve-
hicle. Functional system check is necessary
before putting trailer into service. Semitrailer
parking brakes are provided to maintain brak-
ing and holding requirements whether semi-
trailer is fully loaded or empty. The system will
automatically apply the parking brakes when
air pressure in primary reservoir falls below
specified pressure. Proper operation of this
system must be maintained.

c. Close the drain valves on front and rear reservoir

tanks (fig. 2-2). Open the shut-off valves on the air lines of
the towing vehicle.

d. Plug the intervehicular cable into receptacle

(fig. 2-1) on semitrailer. Operate lights from towing
vehicle to make sure that all semitrailer lights are working
properly.

e. Release the landing gear operating crank

(fig. 2-3) from its clip and engage the crank on its shaft.
When there is no load, pull out on the crankshaft to
engage high-speed gears for fast raising or lowering of the
telescoping legs. When greater power is needed, push in
on the operating shaft to engage the low-speed gears to
lower or raise the legs. Rotate the crank clockwise to raise Figure 2-2. Drain Valves on Air Reservoirs.
the landing gear legs. Replace crank in clip.

2-2
 TM 9-2330-356-14

f. If coupling to an M931A1 or M932A1 towing

vehicle, secure sand shoes in a swing-a-way position
rearward to the semitrailer, using chain assembly
provided.

If ground boards were used, stow them in their

brackets at each side of semitrailer (fig. 2-2).

2-4. Release of Fail-Safe Brakes

NOTE
On M970 and M970A1, brakes will not
release unless hose reel cabinet is closed.

a. Reserve Air Release. If semitrailer is to be moved by

other than a towing vehicle, push brake release plunger on
roadside of semitrailer to release fail-safe brakes
(fig. 2-4). Air in the front reservoir allows the brakes to
release twice. When pressure falls under 55 pounds, the
air reservoir must be recharged either by connecting air
lines to tractor or by using a standard air hose and filling
reservoir through filler valve (fig. 2-4). When filling
through filler valve, only front (secondary) reservoir is
filled. Fill to air gage reading of 90-100 psi. A standard tire
gage can be used to check the pressure.

1. Push crank IN for low speed operation. b. Manual Release (Caging) (M967, M969, and M970
2. Pull crank OUT for high speed operation. except M970 SN TC-0843, TC-0844, and TC-103 thru TC-
3. Rotate crank counterclockwise to lower landing gear legs. 178) (Fig. 2-5). To manually release the fail-safe brakes when
4. Rotate crank clockwise to raise landing gear legs. no air is available, use the following procedure:
TA502281 (1) Block wheels to prevent semitrailer
Figure 2-3. Operation of Two-Speed Landing Gear. movement.

Figure 2-4. Location of Brake Release Plunger

Change 3 2-3
 TM 9-2330-356-14

(5) Install nut on release tool, and tighten until

21/2 to 23/4-inches of release tool is exposed.

(6) Repeat steps (2) through (5) for remaining

fail-safe units.

(7) As soon as air is available to refill the

reservoirs, remove the release tool and nut from each of
the four fail-safe units, and install in mounting hole.
Install plugs in place.

Figure 2-5. Manual Release o Fail-Safe Brake (M967,

M969, and M970 exept M970 SN TC-0843, TC-0844, and
TC-103 thru TC-178).
(2) Unsnap breather cap from each of the four
fail-safe units (fig. 2-5).

(3) Using a 3/4-inch deep socket wrench (Appen-

dix D), turn the manual release bolt counterclockwise un-
tit brake shoes are released on each drum.

Figure 2-6. Manual Release of Fail-Safe Brake (M967A1,

CAUTION M969A1, and M970A1 including M970 SN TC-0843, TC-
0844, and TC-103 thru TC-178).
Do not leave breather caps off any longer 2-5. Operating Towing Vehicle With Semitraller
than necesssary. Water, mud, and other Coupled
contaminants can harm the operation of the
brake actuator. The vent on the breather cap a. Driving. The overall length of the towing vehicle
must beat the lowest location pointing down. and semitrailer must be kept in mind when passing other
vehicles and when turning. Because the unit is hinged in
(4) As soon as air is available to refill the the middle, turning and backing are affected. The surge of
the load also affects stopping.
reservoirs, turn the manual release bolt clockwise on each
of the four fail-safe units until bottomed. Snap breather b. Turning. When turning corners, remember that
caps in place. the semitrailer has a shorter turning radius than the tow-
ing vehicle. To make a right turn at a road intersection, the
c. Manual Release (Caging) (M967A1, M969A1, and towing vehicle must continue forward to about the center
M970A1 including M970 SN TC-0843, TC-0844, and TC-103 of the crossroads, and then turn sharply to the right to al-
thru TC-178) (Fig. 2-6). To manually release the fail-safe low for the shorter turning radius of the semitrailer. lb
brakes when no air is available, use the following prodedure:
back the semitrailer to the right, turn the steering wheel of
the towing vehicle to the left or counterclockwise. The
(1) Block wheels to prevent semitrailer move- front of the semitrailer will be pushed to the left, and the
ment. semitrailer wheels will steer to the right.

(2) Remove nut and the release tool from C. Stopping. In normal operation, the brakes of the
mounting hole in the fail-safe unit (fig. 2-6). towing vehicle and those of the semitrailer are applied at
the same time. Brake pressure should be applied gradually
(3) Remove plug. and smoothly. On steep grades and slippery surfaces, the
semitrailer brakes should be applied first; then the brakes
(4) Insert the release tool into the hole and turn of the towing vehicle should be applied. This procedure
1
/4-turn to seat release tool in pressure plate. will reduce the possibility of the semitrailer jack-knifiig.

2-4 Change 3
 TM 9-2330-356-14

c. Disconnect intervehicular cable from receptacle

CAUTION
on semitrailer (fig. 2-1).

Never use the air brakes on the semitrailer d. If sand shoes are secured in a swing-a-way posi-
when parking If the brake drums are hot. The tion rearward to the semitrailer, release chain assembly.
brake drums will contract (shrink) as they
cool and may crack as the applied brakes e. Release the landing gear operating crank
prevent normal contracting. (fig. 2-3) from its clip, engage crank on shaft, and rotate
the crank counterclockwise to lower the landing gear
(para 2-3) until the foot pads are firmly on either the
d. Parking. When the towing-vehicle-with-semitrail- ground or the ground boards. Replace the crank in its clip
er combination is to be parked and left unattended, set the and secure.
hand brake firmly.
f. Release the semitrailer kingpin from the towing
2-6. Uncoupling Semitrailer From Towing Vehicle vehicles fifth wheel hook by pulling out on the lockjaw
handle. If the hook is binding and will not release, pull the
hook handle harder to force release. Drive the towing
a. If the semitrailer is to be uncoupled in mud, sand,
vehicle forward until the semitrailer is disengaged from
or snow, or if the towing vehicle is an M931A1 or M932A1,
the towing vehicle and is resting on its landing gear.
position ground boards approximately centered beneath
landing gear shoes. 2-7. Jacking Procedures

b. Close the shut-off valves on the service and A jack is not part of the on-vehicle equipment. If you have
emergency air lines at the rear of the towing vehicle. to change a flat during operations, use the towing vehicle
Uncouple the two air brake hoses from the air brake hose jack. Place jack under axle on side of semitrailer with the
couplings on the semitrailer (fig. 2-1). The semitrailer flat tire. Jack up axle until both tires on that end of axle
brakes will set automatically when the emergency air clear the ground. Replace flat tire and wheel with spare
brake hose is uncoupled. Fit dummy couplings on tire and wheel. When lug nuts have been put on and
semitrailer air brake hose couplings. Open drain valves on tightened, lower wheels and remove jack. Recheck lug
front and rear reservoirs (fig. 2-2). nuts for tightness, and stow jack in towing vehicle.

Section II. OPERATION OF AUXILIARY EQUIPMENT

2-8. General Instructions - Fuel Handling (All WARNING

Models) Ladder has narrow tread. Use care when climbing.

NOTE
WARNING Always connect a static ground line to the ve-
hicle, storage facility, aircraft, or equipment
Follow all fuel handling procedures precisely being serviced. If portable ground is used,
make sure a good connection is made.
to prevent injury or death to personnel.
b. Bonding and Grounding (Fig. 2-7.
a. Safety Precautions. It is important that all fuel
(1) Bonding is electrically connecting units or
handling and operating procedures be followed precisely.
containers both to equalize any static potential that might
A detailed study of FM 10-20, FM 10-68, FM 10-69, and
exist before operations begin and to provide a continuous
FM 10-71 is essential for all fuel servicing operations. path for any static electricity that might be generated after
WARNING operations begin.

(2) Grounding is electrically connecting single or

Ensure that grounding connections are made bonded units to a ground rod to discharge into the earth
properly and firmly before any fueling opera- any static potential that might already exist or that might
tions begin. This will ensure that grounding be generated.
connections will not release, thus eliminating
the possibility of sparks caused by static (3) If two or more units are bonded, and one is
electricity which will ignite the fuel. grounded, the whole system is effectively grounded.

Change 1 2-5
TM 9-2330-356-14

Figure 2-7. Typical Ground Connections.

(4) Follow bonding and grounding procedures missing, vehicle is considered not ready for operation.
presented in specific paragraphs on loading, transfers, and On-vehicle equipment consists of the items in Section III
dispensing. of Appendix C.
(5) Before performing maintenance on
semitrailer, semitrailer must be grounded to an approved d. Fire Extinguishers. During all fuel servicing
(earth) ground. operations, the fire extinguishers must be removed from
their stowage brackets and brought to the point of
c. On-vehicle Equipment. Before each operation, operation. Replace fire extinguishers and covers when
check on-vehicle equipment for completeness. If parts are fuel servicing is completed.

2-6
 TM 9-2330-356-14

2-9. Engine Controls and Instruments

CAUTION
The engine control panel (fig. 2-9) is located on the
Operator(s) must be alert for leaking and roadside of the semitrailer, above the piping assembly
malfunctioning equipment. Stop all servicing (figs. 2-11 and 2-12). Control functions and gage readings
operations Immediately at the first sign of are explained in the following paragraphs.
leaks or malfunctions. Corrective action must
be performed by qualified technicians before a. Preheater Switch. Connects battery voltage to glow
resuming any operations. plugs in engine intake manifold to preheat the engine.
(Engine switch, item b, must be in RUN position.)

e. Spills and Leaks. All spills must be cleaned up b. Engine Switch. In RUN position, energizes engine
immediately. Suitable containers must be placed under electrical system and fuel pumps to permit engine
hose connections and similar locations to collect leakage operation. STOP position cuts off fuel supply and stops
the engine.
or spills.
c. Indicator Light. This should turn on when
f. Vapor Recovery. A vapor recovery kit can be Preheater Switch is turned to ON position. If light does
installed on all models (para 1-9). The arrangement of the not come on, it indicates there is no current flow to the
vapor recovery system is shown in figure 2-8. manifold heaters and glow plugs.

Figure 2-8. Typical Vapor Recovery System.

2-7
TM 9-2330-356-14

Figure 2-9. Typical Control Panel.

d. Starter Switch. Engages starter motor to turn and j. Oil Pressure Gage. Indicates pressure in engine
start the engine. (Engine switch, item b, must be in RUN lubrication system. Normal indication is 30-40 psi when
position.) engine is warm and running.

e. Voltmeter. Indicates battery operating voltage. k. Fuel Pressure Gage. Indicates pressure in the fuel
Normal indication is 12-14V with engine running. injection system. Normal indication is 1214 psi.

f. Tachometer. Indicates engine rpm and should be l. Filter/Separator Gage (M969, M969A1, M970,
used with either Flow Rate/rpm data plate (para 1-11) or M970A1). Indicates amount of restriction in filter/
table 2-2 to select desired flow rate. separator (para 2-15).

g. Hourmeter. Indicates engine running time. NOTE

h. Engine Throttle. Controls and sets engine speed. Pressure will vary. The engine speed, type of
Pull the handle out to the selected setting, then rotate it operation, and nozzles used have a direct
clockwise to lock it in position. effect on pump pressure.

i. Control Panel Light. To illuminate the control m. Pump Pressure Gage. Indicates pressure in the
panel, activate the light switch at the bottom of the light. pump discharge line. Normal operating pressure is 30 psi

2-8
 TM 9-2330-356-14

for the 4-inch low-head pump (M967, M967A1, M969, and (3) Open only those valves required to perform a
M969A1) and 65 psi for the 3-inch high pressure pump specific operation. All other valves must remain closed.
(M970 and M970A1). Close all valves again after completing the operation.

2-10. Engine Operation b. Before Operation. Before starting engine, the

following checks and services should be performed:
a. Prior to Starting Engine. The following precautions
must be taken: (1) Remove fuel tank cap (fig. 2-10) and check
fuel supply. Fill with No. 1 diesel fuel (item 15,
Appendix E) or arctic diesel fuel (item 13, Appendix E)
WARNING for operation below 32F. Use No. 2 diesel fuel (item 14,
Appendix E) for operation above 32F. Tank capacity is
Before and after fuel servicing operations, all approximately 4 gallons.
valves are to be in the closed position. Failure
to follow this warning could result in (2) Pull oil dipstick (fig. 2-10) and check oil level.
excessive spillage and create a fire hazard. If oil dipstick reads L (low), add one quart to bring oil to F
(full) mark. If below L mark, add one quart at a time until
(1) Make sure all manually operated valves arc dipstick reads F. For oil specifications, see figures 3-1
closed. This is a must before either starting or ending any through 3-6.
fuel servicing operation.
(3) Check air cleaner restriction indicator
(2) To prevent collapse of tank when filling or (fig. 2-10) for a red band showing in indicator window. A
emptying tank, ensure that the top vent is working red band showing indicates that the engine air cleaner is
properly (para 2-11f). dirty. Clean or replace the air cleaner element (para 3-18).

Figure 2-10. Engine and Pump Assembly.

2-9
TM 9-2330-356-14

NOTE
WARNING
If operating In cold weather, cover (dust boot)
Carbon monoxide can be deadly. DO NOT of fuel stop solenoid must be cut off. Cover
operate engine in an enclosed area unless stiffens in cold temperatures and stops flow
it Is adequately ventilated. of fuel to engine.

Operators must wear ear protection while (1) Ensure that the engine has the proper oil and
on engine side of semitrailer with engine fuel for the existing temperatures. For fuel specifications,
running, Failure to follow this warning may see paragraph 2-10b. For oil specifications, see figures 3-1
result In injury to personnel. through 3-6.

Starting Engine. This procedure is for starting a (2) Keep batteries fully charged.
cold engine in temperatures above 55F (fig. 2-9).
NOTE
(1) Rotate engine switch (2) to RUN.
Entire cold weather starting procedure may
not be required. The colder the temperature,
NOTE the more preheating and cranking will be
When engine is warm or restarted after short required.
periods of time, preheating is usually not
necessary. in temperatures below 30 F, a (3) Cold Weather Starting. When temperatures
longer preheating period Is needed (para f). are below 30F, use the following procedure to start the
engine (fig. 2-9).
(2) Rotate preheater switch (1) to ON for about (a) Pull throttle about half way out.
1 minute. Ensure indicator light (3) has illuminated.
(b) Engage preheater switch (1) and leave
(3) After 1 minute, continue to hold preheater turned on until engine has started, approximately 5
switch and rotate starter switch (4) to START minutes at coldest temperature.

(4) Release both starter switch and preheater (c) After 1 3/4 minutes, move engine switch
switch after engine starts. (2) to RUN position. Wait 15 seconds, then engage starter
switch (4) to START position and crank for 15 seconds.
(5) Check the gages for correct indication. Stop Disengage starter switch.
the engine if a system malfunction is indicated.
NOTE
d. Stopping Engine.
DO NOT disengage starter switch (4) at first
firing of engine. Continue with switch
CAUTION engaged for a limited time (30 seconds
maximum) to help engine run and gain speed.
Throttle engine to fast idle (1200 rpm) for
about 5 minutes before stopping to allow for (d) Wait one minute and engage starter
gradual cooling of engine. switch (4). Crank for one minute, or until running, then
disengage starter switch.
(1) Release throttle to low idle. (e) If engine has still not started, engage
starter switch (4) and crank for one minute. Engine should
(2) Rotate engine switch (2, fig. 2-9) to STOP. be firing. Disengage starter switch when engine is
increasing speed.
e. Engine Operation High Temperature.
(f) Turn off preheater switch (1).
(1) See that nothing obstructs the air flow to and
from the engine oil cooler and the cylinder cooling fins. 2-11. Identification of Valves, Piping, and
Dispensing Components
(2) See that all shrouds are properly installed and
in good condition. The operator/crew should become thoroughly familiar
with all valves and controls before beginning any fuel
f. Engine Operation Low Temperature. servicing operation. Compare figures 2-10 through 2-15

2-10
 TM 9-2330-356-14

with the piping schematic, mounted on the tool box cover, (2) Valve B (All Models). Fastened to the rear
for each model. manifold. Controls the opening for bulk delivery
connections.
a. Piping Control Assembly. This assembly contains a
4-inch pilot-operated control valve, plus the following (3) Valve C (M970, M970A1). Attached to the
rear manifold. It is a check valve controlling the opening
components (figures 2-11 and 2-12):
for defueling operation.

(1) Valve A, Emergency Valve Operator (All (4) Valve D, Precheck (All Models). Fastened to
Mode/s). Mechanically controls both the emergency valve the frame above the piping control assembly. Provides a
on the outlet sump and the vapor vent on top of way to check the shut-off float for proper functioning.
semitrailer. (para 2-11g).

Figure 2-11. Piping Assembly and Valve Locations (M967, M967A1, M969, and M969A1)
(M969 and M969A1 Arrangement Shown).

2-11
TM 9-2330-356-14

Figure 2-12. Piping Assembly and Valve Locations (M970 and M970A1).

(5) Valve E (M967, M967A1, M969, M969A1). (11) Valve K (M969, M969A1, M970, M970A1). On
Located next to the precheck valve (D). Provides the rear manifold. Allows fuel flow between the bulk
load/unload selection (para 2-11h). delivery connections and the filtering/dispensing system.

(6) Valve E (M970, M970A1). Allows evacuation

of fuel from the dispensing systems. WARNING

(7) Valve F (All Models). Opens the pump outlet DO NOT let go of static reel cable when
line to permit bulk fuel delivery (nonfiltered). rewinding until the ball stop is firmly touching
the reel. Failure to follow this warning may
(8) Valve G (All Models). Located between the cause Injury to personnel.
front and rear manifolds. Permits gravity unloading and
self-loading. Valve is open when handle is parallel to pipe.
(12) Static Reel. The static ground cable is pulled
(9) Valve H (All Models). Located in the front from the static reel and attached to unit being serviced,
manifold. Permits fuel flow through the manifold to the and to a ground plug, stud, or clamp. The reel has an
pump. automatic locking device which engages when cable is
extended to the desired length and releases when cable is
(10) Valve J (All Models). Allows water drain of the pulled out again. The reel is spring loaded to rewind
front manifold. automatically.

2-12
 TM 9-2330-356-14

b. Filter/Separator (M969, M969A1, M970, and extended to the desired length and releases when hoses
M970A1). Two valves are located near the filter/separator are pulled out again. The reel is spring-loaded to rewind
(fig. 2-13). automatically.

(1) Valve M. Controls fuel flow from the pump (3) Deadman Release Plunger (M970 and
outlet to the inlet of the filter/separator. Valve is open M970A1). This control deactivates the deadman control
when handle is parallel to pipe. system after the 2-inch hose has been used, allowing fuel
flow to the 1-inch hose.
(2) Valve N. The manual drain for the sump on
the filter/separator.
NOTE
c. Hose Reel Cabinet (M969, M969A1, M970, and
On the M969 and M969A1, an Aqua-Glo
M970A1). Contains the following valves and components probe and fuel-sampling adapter may be
(figs. 2-14 and 2-15):
installed on outlet nipple of both or either
meter. This installation provides a port
(1) Valves P and R. Permit fuel flow through the downstream of filter/separator to draw fuel
hose reels. samples for water (Aqua-Glo) test.
(2) Valve S (M970 and M970A1), Deadman
Control. A hand-held valve that operates a shut-off valve (4) Meter(s). The M970 and M970A1 are
(3-inch control valve) in the hose reel supply line. It is only equipped with a single meter. The M969 and M969A1 are
used when the 2-inch hose is in service. The reel has an equipped with two meters. To reset the meter to zero,
automatic locking device which engages when hoses are push the meter reset knob in and turn clockwise.

Figure 2-13. Filter/Separator (M969, M969A1, M970, and M970A1).

2-13
TM 9-2330-356-14

Figure 2-14. Hose Reel Cabinet (M969 and M969A1).

(5) Hose Reels. The M969 and M969A1 are Is to be used, ensuring that hose is rewound
equipped with two 1-inch hose reels. The M970 and slowly. Caution should be used at the hose
M970A1 are equipped with one 1-inch hose reel and one reels to prevent accidental tripping of the
2-inch hose reel. rewind switches. If these are accidentally
depressed by hand or by falling objects,
(a) Unwinding Hose. Release hose reel lock serious injury to persons and/or damage to
by turning hand wheel on hose reel counterclockwise equipment may occur.
(figs. 2-14 and 2-15). Pull hose off reel to length required
for each fuel service operation. NOTE
Hose must be evacuated of fuel before
rewinding (para 2-14d).
WARNING
(b) Rewinding Hose. To electrically rewind
Use extreme caution when operating electric hose reels, push the hose reel rewind button (figs. 2-14 and
rewind on hose reels. Never use the electric 2-15) for the specific hose reel to be rewound. To avoid dis-
rewind on both hose reels at the same time. charging battery, rewind hose reels while engine is run-
Electric rewind should be halted, then ning. To manually rewind hose reels, remove crank from
resumed carefully as the fuel dispensing its stowed position in hose reel cabinet, and install on re-
nozzle approaches the vehicle. As the hose wind shaft of hose reel. To rewind hose reel on left side of
becomes fully wound on the hose reel, the cabinet, turn crank clockwise. To rewind hose reel on right
nozzle may slam against the vehicle with side of cabinet, turn crank counterclockwise. Remove
force sufficient to cause Injury to persons crank and stow in cabinet. Lock hose reel by turning hand
and/or damage to equipment. Extreme care wheel clockwise.

2-14
 TM 9-2330-356-14

Figure 2-15. Hose Reel Cabinet (M970 and M970A1).

2-15
TM 9-2330-356-14

e. Nozzles. Make sure hoses are installed with

WARNING
correct nozzles for the operation intended. For M969 and
M969A1, contact unit maintenance to install nozzles.
DO NOT let go of static reel cable when re-
winding until the ball stop Is firmly touching
the reel. Failure to follow this warning may f. Emergency Valve Operation. The emergency valve
cause injury to personnel. (fig. 2-16) controls the tank outlet. The emergency valve
and its related vapor vent are mechanically operated by a
lever, operator A, in the piping control assembly (figs. 2-11
(6) Static Reel (M969 and M969A1). This static and 2-12). Engaging the lever opens the emergency valve
reel in the piping control assembly (para 2-11) is used to permit fuel flow to/from the tank sump. At the same
when two vehicles are being serviced at the same time.
time, the vapor vent at the top of the tank opens to relieve
The static ground cable is pulled from the static reel and pressure/vacuum during loading/unloading.
attached both to the unit being serviced and to a grounding
plug, stud, or clamp. The reel has an automatic locking
device which engages when the cable is extended to the (1) The emergency valve must be open for all
desired length and releases when the cable is pulled out loading/unloading operations except top loading.
again. The reel is spring-loaded to rewind automatically.
(2) In an emergency, close the emergency valve
d. Bulk Fuel Servicing Hoses. Whenever bulk fuel by disengaging operator A (roadside of semitrailer) or by
hose is required, remove the necessary lengths from the pulling emergency valve shut-off (fig. 2-17) (on opposite
hose troughs and couple together as required. side).

Figure 2-16. Emergency Valve and Vent.

2-16
 TM 9-2330-356-14

Figure 2-17. Typical Emergency Valve Cable Installation.

(3) In event of fire or explosion, either the fusible uncontrolled fuel spillage and danger of fire
nut on the emergency valve operator A, or the fuse plates and explosion.
at the emergency valve, will melt, releasing the emergency
valve and automatically stopping fuel flow (fig. 2-17). (1) Shortly after fuel flow has begun, open
precheck valve D (figs. 2-18 and 2-19) to precheck the
Loading Precheck (All Models). automatic shut-off. Opening valve D sends fuel to a float
g.
valve inside the tank to simulate full tank condition.

(2) If float is functional, flow should start after

WARNING about 20-25 seconds.

When filling tank by means of bottom loading, (3) Close valve D. Flow will resume in about
defueling (M970 and M970A1 ), or self-load- 20 seconds.
ing, a test of the precheck system is manda-
tory. If this system is not functioning, stop all (4) During normal loading through bottom of
operations. Determine the problem and have tank, the shut-off system will stop the incoming flow
it corrected by a qualified technician. Failure automatically when fuel reaches the level of the float
of automatic shut-off to function may result in valve.

2-17
TM 9-2330-356-14

Figure 2-18. Arrangement of Precheck System for M970 and M970A1.

Figure 2-19. Arrangement of Load/Unload Selector and Precheck Systems for the M967, M967A1, M969, and M969A1.

2-18
 TM 9-2330-356-14

h. Load/Unload Selector (M967, M967A1, M969, and 4-inch control valve closes, eliminating flow through the
M969A1), control valve during bulk delivery and fuel servicing
operation.
(1) Before opening any valves for a fuel service
operation, ensure that the unload/load selector valve E 2-12. Fueling/Defueling Operations
handle (fig. 2-19) is in the proper position for the fuel
servicing operation.
WARNING
(2) Load Position. When selector valve E is in the
load position, it directs pilot pressure to the 4-inch control All fueling/defueling operations must be per-
valve for the bottom loading operation. formed outside.
(3) Unload Position. When selector valve E is in
the unload position, it shuts off the pilot pressure to the a. Operation Summary. Refer to table 2-1 for a
4-inch control valve. With pilot pressure shut off, the summary of operations pertaining to your semitrailer.

Table 2-1. Fueling/Defueling Operation Summary

M967 and M967A1

The following operations can be performed with the M967 and M967A1, Bulk Haul, Self-Load/Unload
Semitrailer:
BULK HAUL AND FUEL SERVICING NOT INVOLVING USE OF PUMP AND ENGINE.
Top Loading Para 2-13a.
Bottom Loading (Nonfiltered) Para 2-13b.
Gravity Unload Para 2-13c.

NONFILTERED FUEL SERVICING INVOLVING USE OF ENGINE AND PUMP

Self-Load Para 2-14a.
Bulk Delivery Para 2-14b

M969 and M969A1

The following operations can be performed with the M969 and M969A1, Automotive Fuel Dispensing
Semitrailer:
BULK HAUL AND FUEL SERVICING NOT INVOLVING USE OF PUMP AND ENGINE.
Top Loading Para 2-13a.
Bottom Loading (Nonfiltered) Para 2-13b.
Gravity Unload Para 2-13c.

NONFILTERED FUEL SERVICING INVOLVING USE OF ENGINE AND PUMP

Self-Load Para 2-14a.
Bulk Delivery Para 2-14b.
Nonfiltered Dispensing Para 2-14c.

FILTERED FUEL SERVICING.

Filtered Bulk Delivery Para 2-16a.
Filtered Fuel Dispensing Para 2-16b.

2-19
TM 9-2330-356-14

Table 2-1. Fueling/Defueling Operation Summary (Con t).

M970 and M970A1

me following operations can be performed with the M970 and M970A1, Aircraft Under/Overwing Fuel Dispens-
ing Semitrailer:
BULK HAUL AND FUEL SERVICING NOT INVOLVING USE OF PUMP AND ENGINE.
Top Loading Para 2-13a.
Bottom Loading (Nonfiltered) Para 2-13b.
Gravity Unload Para 2-13c.

NONFILTERED FUEL SERVICING INVOLVING USE OF ENGINE AND PUMP

Bulk Delivery Para 2-14b.

FILTERED FUEL SERVICING.

Filtered Self-Load Para 2-17a.
Filtered Bulk Delivery Para 2-17b.

AIRCRAFT FUEL SERVICING.

Fuel Sampling Para 2-18a.
Aircraft Single Point Underwing Fuel Dispensing Para 2-18b.
Aircraft Overwing/Closed Circuit Dispensing Para 2-18c.
Defueling with 2-inch Hose Para 2-18d.
Defueling with 1-inch Hose Para 2-18e.
Recirculation with 2-inch Hose Para 2-18f.
Recirculation with l-inch Hose Para 2-18g.

WARNING WARNING

DO NOT mix incompatible fuels In tank. When top loading through fill cover, there Is
Dangerous fumes and explosion may result. no automatic shutdown. Man the loading
Know what fuel was previously carried so that hose to avoid fuel spillage. Use capacity
preventive measures may be taken to ensure indicator gage and dipstick gage to
that injurious or explosive fumes are not determine amount of fuel loaded. Failure to
released. Failure to follow this warning may follow this warning may result in uncontrolled
result in injury or death to personnel. fuel spillage and a fire or explosion hazard.

b. Changing Fuels. If fuel to be loaded is not the same WARNING

fuel as previously carried, refer to FM 10-71, Petroleum
Tank Vehicle Operations, for information on purging Ladder has narrow tread. Use care when climbing.
requirements.
(1) Review general instruct ions in paragraph 2-8.
2-13. Basic Bulk Haul and Fuel Servicing
Operations Not Involving Use of Engine and (2) Ensure that all valves are closed.
Pump (All Models)
(3) Ground the semitrailer tank (para 2-8).
a. Top Loading (Fig. 2-21). The semitrailer should
only be loaded through the top manhole when bottom
loading is not possible. Bottom loading minimizes the (a) Loading With Rack or Stand. Connect the
level of static electricity buildup. bonding and grounding cable of the loading rack or stand
to one of the four grounding studs on top of tank or one of
the two on the lower side of the tank (fig. 2-7) before
opening fill cover.

2-20 Change 1
 TM 9-2330-356-14

Figure 2-20. Typical Top View of Semitrailer.

2-21
TM 9-2330-356-14

(b) Loading With a Hose. The loading hose (5) Remove padlock. Slowly open fill cover
from the storage facility may have a metal fitting on the (fig. 2-20) and insert hose far enough to keep end of hose
free end, and the hose may not be bonded internally. Such in contact with bottom of tank.
a fitting is insulated and could become charged. Before
opening fill cover, connect the vehicle bonding and NOTE
grounding cable to grounding stud (fig. 2-7) on top of tank
The capacity Indicator gage Is located Inside
and to some part of the permanent piping of the loading
facility. the tank near the fill cover (fig. 2-20).

(4) Remove fire extinguishers and bring them to (6) Slowly begin flow, and fill tank no further
the point of operation. than to the bottom of the capacity indicator.

Figure 2-21. Typical Arrangement for Top Loading.

2-22
 TM 9-2330-356-14

(7) Capacity indicator may he adjusted as follows: (9) Drain accumulated water (para 2-13d).
(a) Locate the semitrailer on level ground. (10) Remove grounding clip from grounding stud
(b) Ensure that tank is empty. on top of tank. Store and cover fire extinguishers.

(c) Fill the tank by metering in 5000 gallons b. Bottom Loading (Nonfiltered) (Fig. 2-22).
of fuel. (1) Review instructions in paragraph 2-8.
(d) Loosen the jam nut and screw the round (2) Ensure that all valves are closed.
level indicator up or down, as required, until the fuel level
just touches the bottom of the indicator. Hold indicator (3) Ground the semitrailer tank (para 2-8).
firmly and tighten the jam nut. No further adjustment
should be required. (4) Remove cover from bottom loading connec-
tion. Connect bottom loading hose to bottom loading
(8) Remove fill hose. Close and secure manhole connection (fig. 2-22 and 2-11 or 2-12). Have fire extin-
fill cover. Install padlock. guishers ready.

Figure 2-22. Typical Bottom Loading Flow Diagram for All Models (M967 and M967A1 Arrangement Shown).

2-23
TM 9-2330-356-14

(5) Put selector valve E (fig. 2-11) in LOAD (3) Connect grounding wire to storage facility
position (M967, M967A1, M969, and M969A1). and grounding stud (fig. 2-7) on top of semitrailer.

(6) Open emergency valve operator A (fig. 2-11 (4) Remove 4-inch bulk delivery hose(s) from
or 2-12) (para 2-11f). trough (fig. 2-20) by disconnecting spring pins and turning
hose trough bars out of the way.
(7) Begin flow.
(5) Remove dust cover from outlet B (figs. 2-23
and 2-11 or 2-12), and connect hose to outlet B and to
WARNING storage facility.

(6) Remove fire extinguishers and bring to point

When filling tank by means of bottom loading,
of operation.
a test of the precheck system is mandatory. If
this system is not functioning, stop all (7) Make sure valve E (fig. 2-11) (M967,
operations. Determine the problem and have M967A1, M969, and M969A1) is in the UNLOAD
It corrected by a qualified technician. Failure position.
of automatic shut-off to function may result In
uncontrolled fuel spillage and danger of fire (8) Open valves A (para 2-11f), H, G, and B
and explosion. (fig. 2-11 or 2-12) to begin flow.

(8) After flow has begun, open valve D to (9) At end of operation, close all valves.
precheck the shut-off float (para 2-11g). If float is Disconnect the hose and put it in hose trough; secure hose
functional, flow should stop after about 20-25 seconds. trough latches. Reinstall dust cover on outlet B.

(10) Drain accumulated water (para 2-13d).

(9) Close valve D. Flow will resume in about 20
seconds. (11) Remove grounding wires.

NOTE (12) Store and cover fire extinguishers.

Be prepared to stop the fuel supply at the d. Water Drain. Accumulated water should be
loading facility in event of shut-off float drained from the system after each period of operation
malfunction, if leaks are apparent, or other (fig. 2-24).
unusual conditions are seen.
(1) Ensure that all valves are closed.
(10) When tank is full, the flow should stop
(2) Put a container under manifold drain in
automatically. Close all valves, replace all covers, and piping control cabinet. Open emergency valve operator A.
disconnect the hoses. Slowly open valves H and J. Allow to drain until pure fuel
begins to flow. Close valves H and J, and emergency valve
(11) Drain accumulated water (para 2-13d). operator A.
(12) Remove grounding wires. (3) Drain the pilot lines on all models. Open
drain valves as indicated in figure 2-25. Allow to drain until
(13) Store and cover fire extinguishers. fuel begins to flow. Close drain valves.

c. Gravity Unload. (4) On models M969, M969A1, M970, and

M970A1, also drain the filter/separator. Open valve M.
(1) Review instructions in paragraph 2-8. Put a container under valve N on bottom of
filter/separator. Slowly open valve N. Allow to drain until
(2) Ensure that all valves are closed. fuel begins to flow. Close valves N and M.

2-24
 TM 9-2330-356-14

Figure 2-23. Typical Gravity Unloud Flow Diagram for All Models (M967 and M967A1 Arrangement Shown).

2-25
TM 9-2330-356-14

Figure 2-24. Typical Water Drain for All Models (M970 and M970A1 Arrangement Shown).

2-26
 TM 9-2330-356-14

2-14. Nonfiltered Fuel Servicing involving Use of

Engine and Pump
a. Self-Load (M967, M967A1, M969, and M969A1).
Use the following procedure when it is necessary to use
the onboard engine and pump to load fuel from the
storage facility to the semitrailer (fig. 2-26).
(1) Review instructions in paragraph 2-8.
(2) Ensure that all valves are closed.
(3) Connect static reel to storage facility
(fig. 2-7). Remove fire extinguishers and bring to point of
operation.
(4) Start engine (para 2-10). When engine is
warm, adjust to idle speed (1000-1200 rpm).
(5) Remove 4-inch bulk fuel hose from hose
trough (para 2-13).
(6) Remove dust cover from outlet B and connect
bulk fuel hose to outlet and storage facility.
(7) Put valve E (fig. 2-11) in LOAD position.
(8) Open valves A (para 2-11), B, and G.
(9) Adjust engine throttle for desired flow rate
(table 2-2).

WARNING

When filling tank by means of bottom loading,

a test of the precheck system is mandatory. If
this system is not functioning, stop all
operations. Determine the problem and have
It corrected by a qualified technician. Failure
of automatic shut-off to function may result In
uncontrolled fuel spillage and danger of fire
and explosion.

(10) Shortly after flow has started, open valve D to

precheck the shut-off float. If float is functional, flow
should stop after about 20-25 seconds (para 2-11g).
(11) Close valve D. Flow will resume in about 20
seconds.

WARNING

In an emergency, close valve A or pull

emergency valve shut-off on opposite side of
semitrailer.

(12) When tank is full, flow should stop automati-

cally.
(13) At end of operation, idle down engine. Close
all valves. Disconnect 4-inch bulk fuel hose(s) and put
Figure 2-25. Pilot Line Water Drains. them in hose trough. Secure hose trough latches.

2-27
TM 9-2330-356-14

Figure 2-26. Self-Load Flow Diagram (M967, M967A1, M969, M969A1) (M967 and M967Al Arrangement Shown).

Table 2-2. Fuel Dispensing Flow Rates in Gallons Per Minute (GPM).

M967 and M967A1 BULK

M969 and M969A1 AUTOMOTIVE

M970 and M970A1 AIRCRAFT UNDERWING/OVERWING

2-28
 TM 9-2330-356-14

(14) Stop engine (para 2-10d). (6) Remove dust cover from outlet B (fig. 2-11 or
2-12), and connect fuel hose to outlet and storage facility.
(15) Drain accumulated water (para 2-13d).
(7) Put valve E in UNLOAD position (M967,
(16) Remove grounding wires. M967A1, M969, and M969A1).
(17) Store and cover fire extinguishers. (8) Ensure that valve E is in closed position on
M970 and M970A1.
b. Bulk Delivery (All Models). To pump fuel from the
semitrailer to the storage facility (fig. 2-27), use the (9) Open valves A (para 2-11f), B, F, and H.
following procedure:
(10) Adjust engine throttle for desired flow rate
(1) Review instructions in paragraph 2-8. (table 2-2).
(2) Ensure that all valves are closed. (11) Idle down engine at end of operation. Close
all valves, disconnect hose (s), and reinstall dust cover.
(3) Connect grounding wire to storage facility
and grounding stud on top of semitrailer (fig. 2-7). (12) Put bulk fuel hoses in hose trough and secure
Remove fire extinguishers and bring them to the point of latches.
operation.
(13) Stop engine (para 2-10d).
(4) Start engine (para 2-10). When engine is (14) Drain accumulated water (para 2-13d).
warm, adjust throttle to idle speed (1000-1200 rpm).
(15) Remove grounding wire.
(5) Remove 4-inch bulk fuel hose from trough
(para 2-13c). (16) Store and cover fire extinguishers.

Figure 2-27. Typical Bulk Delivery Flow Diagram (M967 and M967A1 Arrangement Shown).

2-29
TM 9-2330-356-14

c. Nonfiltered Dispensing (M969 and M969A1). Fuel unit /container. Remove fire extinguishers and bring them
which does not require filtering is routed directly from the to the point of operation.
pump to the hose reels, bypassing the filter/separator
(fig. 2-28). Use the following procedure: (4) Start engine (para 2-10c). When engine, is
warm, adjust throttle to idle speed (1000-1200 rpm).
(1) Review instructions in paragraph 2-8.
(2) Ensure that all valves are closed. (5) Put valve E (fig. 2-11) in UNLOAD position.

NOTE (6) Open valves A (para 2-11f), F, H, and K.

If two vehicles are being serviced, make sure
they are both grounded using separate static (7) Reset meter (fig. 2-14) to zero by pushing
reels. M969 and M969A1 are equipped with reset knob and turning clockwise. Open either valve P or
two static reels (figs. 2-11 and 2-14). R.

(3) Unreel static reel cable (fig. 2-11), and (8) Adjust engine throttle for desired flow rate
connect it to a suitable ground and to automotive (table 2-2).

Figure 2-28. M969 and M969A1, Nonfiltered Dispensing Flow Diagram.

2-30
 TM 9-2330-356-14

(9) Release lock on hose reel (para 2-11) and (16) Disconnect and rewind the static ground wire.
unreel hose. (17) Store and cover fire extinguishers.
(10) Insert nozzle into vehicle fuel tank/container. d. Hose Evacuation (M970 and M970A1). To purge
Squeeze nozzle trigger to start flow. or remove fuel from the dispensing system, use the
following procedure. This procedure must be done after
(11) At end of operation, release nozzle trigger
every operation using the dispensing hoses (fig. 2-29).
and remove nozzle from vehicle fuel tank/container.
(1) Review instructions in paragraph 2-8.
(12) Idle down engine to 1000-1200 rpm.
(2) Ensure that all valves are closed.
(13) Rewind the hose(s) (para 2-11). Tighten hose
reel lock(s). (3) Remove fire extinguishers and bring to point
of operation.
(14) Close all valves.
(4) Start engine (para 2-10). When engine is
(15) Stop engine (para 2-10d). warm, adjust to idle speed (1000-1200 rpm).

Figure 2-29. Hose Evacuation Flow Diagram (M970 and M970A1).

2-31
TM 9-2330-356-14

(5) Open valves A (para 2-11f), E, G, and K are removed. The fuel then flows through the
(fig. 2-29). Open valve P to evacuate the 1-inch hose second-stage filter elements, which further filters minute
and/or valve R to evacuate the 2-inch hose. particles and coalesces water particles to be collected in
the filter sump. Coalescence is a process by which many
(6) Set engine throttle to maximum speed small droplets of free water in the fuel are collected to
(2400 rpm) for a few seconds until evacuation is form larger water drops. These large water drops are then
completed (meter stops turning backward). released into the filter sump.

(7) Idle down engine. Close all valves. Stop (2) Automatic Water Drain. When water in the
engine (para 2-10d). filter sump reaches a certain level, the water is
automatically ejected out of the filter sump. This is
(8) Store and cover fire extinguishers. accomplished by an automatic drain valve connected to
the filter sump. The drain valve has a ball float which will
2-15. Filter/Separator Operation (M969, M969A1,
float in water but not in any type of fuel. Automatic water
M970, and M970A1)
drain for the M969 and M969A1 is different than for the
a. General. M970 and M970A1.

(1) Filtering Process (Fig, 2-30). With the addition (a) As water accumulates in the filter sump
of the filter/separator on the M969, M969A1, M970, and of the M969 and M969A1, a float rises. When the float
M970A1, the engine and pump assembly provides filtered rises to a certain level, a valve will open in the automatic
fuel for various servicing operations. The filter/separator drain valve, allowing pump pressure to be applied to a
consists of an aluminum tank with 15 filter elements and 5 diaphragm valve opening the automatic drain valve. Water
second-stage water stripper elements. Fuel under is then ejected out of the filter sump through the
pressure from the pump enters the filter case inlet and automatic drain valve. As water is being ejected, fuel flow
flows through the 15 filter elements, where solid particles is continued.

Figure 2-30. Filter/Separator Assembly (M969, M969A1, M970, and M970A1).

2-32
 TM 9-2330-356-14

(b) As water accumulates in the filter sump happens, whatever fuel is passed through is still within the
of the M970 and M970A1, a float rises. When the float specified standards for purity.
rises a certain level, a valve will open in the automatic
drain valve, allowing pump pressure to be applied to a b. Filter/Separator Gage. The filter elements have a
diaphragm valve in the automatic drain valve and to the limited capacity for retaining solids. As the solids content
pilot control on the 3-inch flow control valve. The pump increases, a pressure drop across the elements increases.
pressure opens the diaphragm valve and closes the 3-inch The pressure drop can be measured by a pressure gage
flow control valve. Fuel flow is then shut off, preventing provided in the instrument panel (fig. 2-9). Operating
dispensing of water-contaminated fuel, and the water in pressure readings should be taken and recorded at the first
the filter sump is passed through the automatic drain day of operation and each day of operation thereafter. At
valve. When the fuel flow is stopped by the closing of the initial operation or with replacement elements, the
3-inch flow control valve, no coalescing occurs, and the pressure gage reading should not exceed 3 psi. When the
automatic water drain valve will continue passing water pressure gage reading reaches 25 psi, the elements are
until the float lowers. With the float in the lowered dirty and should be replaced. Notify unit maintenance
position, the water drain valve closes, and the 3-inch personnel when pressure reaches 25 psi.
control valve opens. When this happens, pressure is
trapped in the line to the automatic drain valve diaphragm 2-16. Filtered Fuel Servicing Operations (M969
and pilot control of the 3-inch control valve, preventing and M969A1)
resumption of fuel flow. To release the pressure, a bleed a. Filtered Bulk Delivery. This operation is to be used
line from the automatic drain valve diaphragm and pilot when filtered fuel is required in the storage facility
control will relieve the pressure at the discharge side of (fig. 2-31). Fuel is pumped from the semitrailer tank
the water drain valve. Fuel flow will automatically start through the filter/separator to the storage facility.
again. Filtered bulk delivery operation is as follows:
(3) Cold Weather Draining. During cold weather (1) Review instructions in paragraph 2-8.
operations, the accumulated water in the sump may
freeze. It is important that the manual drain N (fig. 2-30) (2) Ensure that all valves are closed.
on the sump be opened after each operation to drain the
water accumulation. Be sure to close the drain valve after (3) Connect grounding wire to storage facility
draining. and semitrailer (fig. 2-7). Remove 4-inch bulk fuel hose
(para 2-13) from hose trough and connect it to the
receiving facility. Remove dust cap from outlet B and
(4) Go-No-Go Fuses. Each of the 5 second-stage
connect bulk fuel hose to outlet.
coalescing elements is equipped with three Go-No-Go
fuses. These fuses are fuel contaminant monitoring (4) Remove fire extinguishers and bring them to
devices located down-stream of the second-stage. The the point of operation.
fuses restrict the fuel flow when small amounts of water
and solid contaminants are present in the fuel stream. (5) Start engine (para 2-10) and when warm
adjust engine speed to 1000-1200 rpm.
(a) Each fuse consists of a perforated metal
tube filled with thin cellulose washers, except for a space (6) Put selector valve E in UNLOAD position.
about l-inch long at one end. This space is for a plastic
piston forced against the washers by a spring. A plastic (7) Open valves A (para 2-11f), B, H, M, and K.
nipple at the other end of the metal tube fits into an outlet
(8) Adjust engine throttle for desired flow rate
socket in the housing. Fuel flow is through the spirally
(table 2-2).
arranged perforations in the metal tube. The fuel must
flow through the very small passages (about 5 microns) (9) At end of operation, adjust engine to idle
between the cellulose washers to reach the outlet. speed (1000-1200 rpm).

(b) As solid contaminants accumulate on (10) Close all valves.

the outer surface of the stack of washers, resistance to fuel
flow increases. The resulting increased pressure further (11) Remove all hoses and store in hose troughs.
compresses the washer stack. When the contaminant is Secure hose trough latches. Reinstall dust cover on outlet
water, it is also absorbed by the cellulose washers, and the B.
action of the filter is similar.
(12) Shut off engine (para 2-10d).
(c) When solid contaminants or water are (13) Remove grounding wire.
present, the compression of the washer stack continues
until fuel flow is stopped completely. But until this (14) Cover and store fire extinguishers.

2-33
TM 9-2330-356-14

Figure 2-31. Filtered Bulk Delivery Flow Diagam (M969 and M969A1),

2-34
 TM 9-2330-356-14

b. Filtered Fuel Dispensing. This operation is used to (5) Start engine (para 2-10) and when warm
dispense metered fuel from the semitrailer tank to a adjust engine speed to 1000-1200 rpm.
vehicle. Fuel is pumped through the filter/separator, a
meter, and a hose reel to the vehicle (fig. 2-32). Operation (6) Put selector valve E (fig. 2-11) in the
is as follows: UNLOAD position.
(1) Review instructions in paragraph 2-8.
(2) Ensure that all valves are closed. (7) Open valves A (para 2-11f), H, M, and either
P or R, depending on which hose reel is to be used. If both
(3) Unreel the static reel and connect cable first hose reels are to be used, open both valves P and R. Reset
to grounding stud, then to vehicle. meter to zero by pushing in the meter reset knob
(4) Remove fire extinguishers and bring to point (fig. 2-14) and turning clockwise.
of operation.

Figure 2-32. Filtered FueI Dispensing Flow Diagram (M969 and M969A1).

2-35
TM 9-2330-356-14

(8) Adjust engine throttle for desired flow rate c. Fuel Sampling.
(table 2-2).
NOTE
(9) Release lock (para 2-11) on hose reel(s) to be Additional Information on fuel sampling may
used. Unreel hose(s) completely. be obtained from FM 10-68.
(10) Insert nozzle into vehicle being serviced, and (1) Fuel sampling is done during filtered fuel
squeeze nozzle trigger to start flow. dispensing operations. Fuel is removed through an
Aqua-Glo probe and adapter installed on outlet nipple of
(11) Release nozzle trigger at end of operation one or both meters (figure 2-14).
and remove nozzle from vehicle.
(2) Refer to paragraph 2-18 for general fuel
(12) Adjust engine to idle speed (1000-1200 rpm). sampling instructions.

(13) Rewind hose(s) (para 2-11). Do not rewind 2-17. Filtered Fuel Servicing Operations (M970
both hose reels at the same time. Tighten hose reel lock. and M970A1 )
a. Filtered Self-Load. This operation is a means of
(14) Close all valves. loading filtered fuel through the bottom of the tank. Fuel
is pumped from the storage facility through the
(15) Shut off engine (para 2-10d). filter/separator, meter, 2-inch hose reel, and bottom
load adapter (fig. 2-34). Filtered self-load operation is as
WARNING follows:
(1) Review instructions in paragraph 2-8.
DO NOT let go of the static reel cable when
rewinding until the ball stop is firmly touching WARNING
the reel. Failure to follow this warning may
cause injury to personnel. Hose reel cabinet door is heavy-use two
hands when opening and closing. Use
(16) Disconnect static reel cable first from vehicle, latches to lock door. Do not slam.
then from ground. Rewind static reel cable.
(2) Open hose reel cabinet door (fig. 2-33). Pull
(17) Cover and store fire extinguisher(s). release cable and lift door with both hands.

Figure 2-33. Hose Reel Cabinet With Door Closed (M970 and M970A1).

2-36
 TM 9-2330-356-14

Figure 2-34. Filtered Self-Load Flow Diagram (M970 and M970A1).

(3) Ensure that all valves are closed. bottom load adapter and connect underwing nozzle
(fig. 2-34). Turn lever on side of nozzle to open the nozzle.
(4) Connect ground wire to storage facility and
semitrailer (fig. 2-7). Remove 4-inch bulk fuel hose
(para 2-13c) from hose trough and connect to storage NOTE
facility. Remove dust cap from outlet B and connect bulk Make sure valve E is closed and remains
fuel hose to outlet. closed during entire self-load operation.
(5) Remove fire extinguishers and bring to point
of operation. (8) Open valves A (para 2-11f), B, G, M, and R.

(6) Start engine (para 2-10) and when warm (9) Unreel deadman control S (para 2-11) and
adjust engine speed to 10001200 rpm. squeeze the lever. Meter inlet pressure gage (fig. 2-15)
should read a minimum of 25 psi. Release the deadman
(7) Release lock (para 2-11c) on 2-inch hose control. Should gage not indicate a minimum of 25 psi,
reel. Unreel 2-inch hose fully. Remove dust cap from shut down operation and contact unit maintenance.

2-37
TM 9-2330-356-14

(10) Adjust engine throttle for desired flow rate (19) Shut off engine (para 2-10d), then remove the
(table 2-2). grounding wire.

WARNING WARNING

When filling tank by means of self-loading, a Hose reel cabinet door Is heavy-use two
test of the precheck system Is mandatory. If hands when opening and closing. Use
this system Is not functioning, stop all latches to lock door. Do not slam.
operations. Determine the problem and have
It corrected by a qualified technician. Failure (20) Close hose reel cabinet door and latch in
of automatic shut-off to function may result in place,
uncontrolled fuel spillage and danger of fire
and explosion. (21) Store and cover fire extinguishers.

(11) Squeeze and hold lever on deadman control b. Filtered Bulk Delivery. This operation is used when
S. Shortly after flow has begun, turn precheck valve D to filtered fuel is required in the storage facility (fig. 2-35).
the OPEN position to check the automatic shut-off float. Fuel is pumped from the semitrailer tank through the
If float is functional, flow should stop after about filter/separator to the storage facility. Filtered bulk
20-25 seconds (para 2-11g). If valve is not functioning, delivery operation is as follows:
stop all operations. Notify unit maintenance.
(1) Review instructions in paragraph 2-8.
(12) Turn precheck valve D to the CLOSED
position. Free flow will resume in about 20 seconds. (2) Ensure that all valves are closed.

(3) Connect grounding wire to storage facility

CAUTION and semitrailer (fig. 2-7). Remove 4-inch bulk fuel hose
from hose trough and connect to the receiving facility.
In an emergency, release the deadman Remove dust cap from outlet B and connect bulk fuel hose
control S and flow should stop. to outlet.

(13) When tank is full, flow should stop (4) Start engine (para 2-10) and when warm
automatically. adjust engine speed to 1000-1200 rpm.

(14) At end of operation, release the deadman (5) Open valves A (para 2-11f), B, H, M, and K.
control S, and adjust engine to idle speed
(1000-1200 rpm). Rewind the deadman control hose. (6) Adjust engine throttle for desired flow rate
(table 2-2).
(15) Close single point nozzle and disconnect
nozzle from bottom load adapter. Reinstall dust caps on (7) At end of operation, adjust engine to idle
bottom load adapter and single point nozzle. speed (1000-1200 rpm).

(16) Evacuate hose (para 2-14d). (8) Close all valves.

(17) Rewind 2-inch hose (para 2-11). Tighten (9) Remove bulk fuel hose and store in hose
hose reel lock. troughs. Secure hose trough latches. Reinstall dust cap to
outlet B. Remove grounding wire.
(18) Close all valves and remove 4-inch bulk fuel
hose connecting semitrailer to storage facility. Store hose (10) Shut off engine (para 2-10d).
in hose trough. Secure hose trough latches. Reinstall dust
cap to outlet B. (11) Store and cover fire extinguishers.

2-38
 TM 9-2330-356-14

Figure 2-35. Filtered Bulk Delivery Flow Diagram (M970 and M970A1),

2-18. Aircraft Fuel Servicing (1) Remove fuel sampling adapter cap from
single point nozzle or converter.

NOTE (2) Have fuel sampling container ready.

On the M969 and M969A1, an Aqua-Glo
probe and adapter may be installed on outlet NOTE
nipple of both or either meter for obtaining Make sure fuel sampling hose is placed In
fuel samples for water content testing.
container before attaching coupling to
adapter. A valve In the adapter opens,
allowing fuel to flow Into container, when
a. Fuel Sampling. Fuel sampling can be done during
connector is screwed into coupling.
refueling aircraft and recirculating fuel operations. Fuel is
removed through a fuel sampling adapter (fig. 2-36) in the
single point nozzle or converter for overwing nozzle as (3) Remove fuel sampling coupling from tool box
follows: and screw into adapter on single point nozzle or converter.

2-39
TM 9-2330-356-14

(7) Open valves A (para 2-11f), H, M, and R.

Reset the meter to zero by pushing the meter reset knob
(fig. 2-15) and turning clockwise.

(8) Adjust engine throttle for desired flow rate

(table 2-2).

NOTE
The breakaway fitting Is a safety feature on
hose reel for 2-inch hose. It consists of a
breakaway coupling installed between
2-inch hose and outlet port of the hose reel.
Should aircraft be moved with single point
nozzle attached to wing, the coupling will
break apart as hose Is pulled tight against the
coupling, preventing damage to the aircraft.
For reassembly of breakaway fitting refer to
paragraph 3-13.

(9) Release lock (para 2-11) on the 2-inch hose

reel. Unreel all 50-feet of 2-inch hose to ensure that
Figure 2-36. Attaching Fuel Sampling Hose to Nozzle breakaway feature will be operable.
(M970 and M970A1).

(4) When enough fuel is collected, unscrew fuel WARNING

sampling coupling from the adapter. Install cap on adapter
and put fuel sampling coupling in tool box. Bonding of the semitrailer to aircraft and
grounding procedures per paragraph 2-8b
while refueling shall be mandatory,
b. Aircraft Single Point Underwing Fuel Dispensing
regardless of the amount of fuel to be
Operation. This operation is used to dispense metered fuel
dispensed, due to the dangers of static
from semitrailer to an aircraft through an underwing
electricity. Bond the fuel nozzle ground wire
connection. Fuel is pumped through the filter/separator, a
to the aircraft before bringing nozzle in
meter, and a hose reel to the aircraft (fig. 2-37). Operation
contact with the aircraft.
is as follows:
(10) Attach single point nozzle (fig. 2-34) ground
(1) Review instructions in paragraph 2-8.
wire to aircraft. Connect single point nozzle to adapter on
aircraft. Open nozzle by turning lever on side of nozzle.
WARNING (11) Unreel deadman control hose and activate
deadman control S by depressing control lever. Meter
Hose reel cabinet door Is heavy-use two inlet gage (fig. 2-15) should indicate a minimum of 25 psi.
hands when opening and closing. Use Should gage not indicate a minimum of 25 psi, shut down
latches to lock door. Do not slam. operation and contact unit maintenance.
(12) Release deadman control S at end of
(2) Open hose reel cabinet door. Pull release operation, and adjust engine to idle speed
cable and lift door with both hands. (1000-1200 rpm). Rewind the deadman control hose.

(3) Ensure that all valves are closed. (13) Close single point nozzle. First disconnect
single point nozzle from aircraft, then disconnect the
(4) Unreel the static reel cable and connect it nozzle ground wire.
first to grounding stud and then to aircraft.
(14) Evacuate hose (para 2-14d).
(5) Remove fire extinguishers and take to point (15) Rewind the 2-inch hose (para 2-11).
of operation. Tighten hose reel lock.

(6) Start engine (para 2-10) and when warm (16) Close all valves and shut off engine
adjust engine speed to 1000-1200 rpm. (para 2-10d).

2-40
 TM 9-2330-356-14

Figure 2-37. Single Point Underwing Fuel Dispensing Flow Diagam (M970 and M970A1).

WARNING WARNING

DO NOT let go of the static reel cable when Hose reel cabinet door Is heavy use two
rewinding until the ball stop is firmly touching hands when opening and closing. Use
the reel. Failure to follow this warning may latches to lock door. Do not slam.
cause injury to personnel.
(18) Close hose reel cabinet door and latch it in
place.
(17) Disconnect static reel cable first from
aircraft, and then from grounding stud. Rewind static reel. (19) Store and cover fire extinguishers.

2-41
TM 9-2330-356-14

c. Aircraft Overwing/Closed Circuit Fuel Dispensing (2) Open hose reel cabinet door. Pull release
Operation. The overwing fuel dispensing operation is used cable and lift door with both hands.
to fuel winged aircraft through a fill port on top of aircraft
wings. The closed circuit fuel dispensing operation is used (3) Ensure that all valves are closed.
to fuel helicopters. Fuel is pumped through the filter/se- (4) Unreel the static reel cable and connect first
parator, a meter, and a hose reel to the aircraft or helicop-
to grounding stud and then to aircraft.
ter (fig. 2-38). Fuel dispensing operation is as follows:
(5) Remove fire extinguishers and bring to point
(1) Review instructions in paragraph 2-8. of operation.
(6) Start engine (para 2-10) and when warm
WARNING adjust engine speed to 10001200 rpm.
Hose reel cabinet door is heavy use two (7) Open valves A (para 2-11f), H, M, and P.
hands when opening and closing. Use Reset the meter to zero by pushing the meter reset knob
latches to lock door. Do not slam. (fig. 2-15) and turning clockwise.

Figure 2-38. Aircraft Overwing/Closed Circuit (Helicopter) Fuel Dispensing Flow Diagram.

2-42
 TM 9-2330-356-14

NOTE (12) At end of operation, release overwing nozzle

trigger or return closed circuit nozzle control handle to
If 2 inch hose was used before using 1
the no flow position.
inch hose, depress and hold deadman
release plunger in the hose reel cabinet
(fig. 2-1 5) for 5-10 seconds to deactivate the NOTE
deadman system. If this procedure is not Do not disconnect nozzle ground wire before
followed, no fuel will flow to 1-inch hose. removing nozzle. Always remove nozzle first.

(8) Adjust engine throttle for desired flow rate (13) Remove overwing nozzle or disconnect
(table 2-2). closed circuit nozzle by pulling actuating cable loop
(fig. 2-39). Reinstall aircraft fill cover.
(9) Release lock (para 2-11) on 1-inch hose
reel. Unreel hose far enough to reach aircraft. (14) Evacuate hose (para 2-14d).

(15) Rewind the 1-inch hose (para 2-11). Tight-

WARNING en hose reel lock.

Bonding of the semitrailer to aircraft and (16) Close all valves and shut off engine
grounding procedures per paragraph 2-8b (para 2-10d).
while refueling shall be mandatory, regard-
less of the amount of fuel to be dispensed, WARNING
due to the dangers of static electricity. Bond
the fuel nozzle ground wire to the aircraft be- DO NOT let go of the static reel cable when
fore bringing nozzle in contact with the air- rewinding until the ball stop Is firmly touching
craft. the reel. Failure to follow this warning may
cause Injury to personnel.
(10) Before removing aircraft fill cap, attach
nozzle (fig. 2-38) ground wire to aircraft. (17) Disconnect the static reel cable first from
aircraft and then from grounding stud. Rewind the static
(11) Insert overwing nozzle into fill port of reel.
aircraft, or connect closed circuit nozzle to helicopter
(fig. 2-38). Squeeze nozzle control handle on closed
circuit nozzle (fig. 2-39). Complete extension of red WARNING
indicator indicates no flow.
Hose reel cabinet door is heavy use two
hands when opening and closing. Use
latches to lock door. Do not slam.

(18) Close hose reel cabinet door and latch it in

place.

(19) Store and cover fire extinguishers.

d. Defueling Operation With 2-inch Hose. This oper-

ation is used to remove fuel from aircraft. The fuel is
pumped from the aircraft through a filter/separator, a me-
ter, a hose reel for the 2-inch hose, a bottom load adapt-
er, and into the tank (fig. 2-40). Operating instructions are
as follows:

NOTE
A defueling hose must be available at the site.
The semitrailer does not include a defueling
hose.

(1) Review instructions in paragraph 2-8.

Figure 2-39. Closed Circuit Nozzle Operation.

2-43
TM 9-2330-356-14

Figure 2-40. Diagram for Refueling Using 2-inch Hose (M970 and M97OA1).

WARNING (3) Ensure that all valves are closed.

Hose reel cabinet door is heavy use two (4) Remove fire extinguishers and take them to
hands when opening and closing. Use point of operation.
latches to lock door. Do not slam.

(2) Open hose reel cabinet door. Pull release (5) Start engine (para 2-10) and when warm
cable and open door with both hands. adjust engine speed to 1000-1200 rpm.

2-44
 TM 9-2330-356-14

WARNING shut-off float. After about 2025 seconds flow should stop
to indicate that the float is working properly (para 2-11g).
Bonding of the semitrailer to aircraft and
grounding procedures per paragraph 2-8b NOTE
while refueling shall be mandatory, regard- When tank is full, flow should stop automati-
less of the amount of fuel to be dispensed, cally.
due to the dangers of static electricity. Bond
the fuel nozzle ground wire to the aircraft be-
fore bringing nozzle In contact with the air- (13) Close precheck valve D to the CLOSED
craft. position. Fuel flow will resume in about 20 seconds.

(14) At end of operation, release deadman control

(6) Unreel static reel cable and connect first to S and adjust engine to idle speed (1000-1200 rpm).
grounding stud, then to aircraft. Rewind the deadman control hose.

(7) Release lock (para 2-11) on the 2-inch hose (15) First remove the defueling hose from aircraft,
reel and unreel to full length. Remove the dust capon the then remove the hose ground wire. Disconnect the
bottom load adapter and connect single point nozzle to defueling hose from inlet C. Replace the dust cap to outlet
bottom load adapter. Open single point nozzle by turning c.
handle on side of the nozzle.
(16) Close the single point nozzle and disconnect
(8) The defueling hose will be provided at the nozzle from the bottom load adapter. Replace dust
operation site. Remove dust cap from outlet C and caps on single point nozzle and bottom load adapter.
connect defueling hose to inlet. Nest connect the hose.
(17) Evacuate hose (para 2-14d)
NOTE (18) Rewind the 2-inch hose (para 2-11). Tighten
Make sure valve E is closed and remains hose reel lock.
closed during entire operation.
(19) Close all valves and shut off engine
(para 2-10d).
(9) Open valves A (para 2-11f), G, M, and R.
Reset the meter to zero by pushing in reset knob (fig. 2-15)
and turning clockwise. WARNING

(10) Set engine throttle at desired flow rate DO NOT let go of the static reel cable when
(table 2-2). rewinding until the ball stop is firmly touching
the reel. Failure to follow this warning may
(11) Unreel deadman control S. Squeeze the cause injury to personnel.
trigger on deadman control to start fuel flow. Meter inlet
pressure gage (fig. 2-15) should be indicating a minimum (20) Disconnect the ground connection first from
of 25 psi. If a minimum of 25 psi is not indicated, shutdown the aircraft, then from the grounding stud. Rewind the
operation and contact unit maintenance. static reel cable.

WARNING
WARNING Hose reel cabinet door is heavy-use two
hands when opening and closing. Use
When filling tank by means of defueling, a test latches to lock door. Do not slam.
of the precheck system is mandatory. If this
system is not functioning, stop all operations.
Determine the problem and have it corrected (21) Close hose reel cabinet door and latch it in
place.
by a qualified technician. Failure of automatic
shut-off to function may result in uncontrolled (22) Store and cover fire extinguishers.
fuel spillage and danger of fire and explosion.
e. Defueling Operation With 1-inch Hose. This
(12) Shortly after flow has begun, turn precheck operation is used to remove fuel from an aircraft. The fuel
valve D to (he OPEN position to precheck the automatic is pumped from the aircraft through a filter/separator, a

2-45
TM 9-2330-356-14

meter, a hose reel for the 1-inch hose, a bottom load

adapter, and into bottom of tank (fig. 2-41). Operating WARNING
instructions are as follows:
Hose reel cabinet door is heavy-use two
hands when opening and closing. Use
NOTE latches to lock door. Do not slam.
The converter (fig. 2-41 ) must be Installed
onto the overwing nozzle for this (2) Open hose reel cabinet door. Pull release
operation. Remove spout from overwing cable and lift door with both hands.
nozzle and install converter.
(3) Ensure that all valves are closed.
A defueling hose must be available at the
site. The semitrailer does not include a (4) Remove fire extinguishers and take to point
defueling hose. of operation.
(5) Start engine (para 2-10) and when warm
(1) Review instructions in paragraph 2-8, adjust engine speed to 1000-1200 rpm.

Figure 2-41. Diagram for Defueling Using 1-inch hose (M970 and M970A1).

2-46
 TM 9-2330-356-14

WARNING shut-off float. If float is functional, flow should stop after

about 20-25 seconds (para 2-11g).
Bonding of the semitrailer to aircraft and
grounding procedures as in paragraph 2-8b NOTE
while refueling shall be mandatory, regard- When tank Is full, flow should stop automati-
less of the amount of fuel to be dispensed, cally.
due to the dangers of static electricity. Bond
the fuel nozzle ground wire to the aircraft be-
fore bringing nozzle In contact with the air- (12) Close precheck valve D to the CLOSED
craft. position. Fuel flow will resume in about 20 seconds.

(13) At end of operation, release the trigger on the

(6) Unreel static reel cable and connect it first to overwing nozzle, and adjust engine to idle speed
grounding stud, then to aircraft. (1000-1200 rpm).
(7) Release lock (para 2-11) on the 1-inch hose (14) Remove the defueling hose from aircraft
reel, and unreel all hose. Remove the dust cap from the first, then remove the hose ground wire. Disconnect the
bottom load adapter and connect converter to the defueling hose from inlet C. Replace the dust cap to
adapter. outlet C.
(8) Remove dust cap from inlet C and connect
defueling hose to inlet. Next connect the defueling hose WARNING
ground wire to the aircraft, then connect the hose.
DO NOT let go of the static reel cable when
NOTE rewinding until the ball stop is firmly touching
the reel. Failure to follow this warning may
Make sure valve E is closed and remains cause injury to personnel.
closed during entire operation.
(15) Disconnect the ground connection first from
(9) Open valves A (para 2-11f), G, M, and P the aircraft, then from the grounding stud. Rewind the
Reset the meter to zero by pushing in reset knob (fig. 2-15)
static reel cable.
and turning clockwise.
(16) Disconnect the overwing nozzle/converter
NOTE from the bottom load adapter. Replace dust cap on bottom
load adapter.
If 2-inch hose was used before using
1-inch, depress and hold deadman release (17) Evacuate hose (para 2-14d).
plunger in the hose reel cabinet (fig. 2-15) for
5-10 seconds to deactivate the deadman (18) Rewind the 1-inch hose (para 2-11).
system. If this procedure Is not followed, no Tighten hose reel lock.
fuel will flow to 1-inch hose.
(19) Close all valves and shut off engine
(10) Set engine throttle at desired flow rate (para 2-10d).
(table 2-2). Squeeze trigger on overwing nozzle.
(20) Remove converter from overwing nozzle and
install spout to nozzle.
WARNING

When filling tank by means of defueling, a test WARNING

of the precheck system is mandatory. If this
system Is not functioning, stop all operations. Hose reel cabinet door Is heavy-use two
Determine the problem and have It corrected hands when opening and closing. Use
by a qualified technician. Failure of automatic latches to lock door. Do not slam.
shut-off to function may result in uncontrolled
fuel spillage and danger of fire and explosion. (21) Close hose reel cabinet door and latch it in
place.
(11) Shortly after flow has begun, turn precheck
valve D to the OPEN position to precheck the automatic (22) Store and cover fire extinguishers.

2-47
TM 9-2330-356-14

f. Recirculation Operation With 2-inch Hose. This (2) Open hose reel cabinet door. Pull release
operation is used when the fuel in the tank must be refilt- cable and lift door with both hands.
ered. The fuel is recirculated through the filter/separator,
meter, hose reel for the 2-inch hose, and recirculation
fitting on side of tank (fig, 2-42). Operation instructions (3) Ensure that all valves are closed.
are as follows:
(4) Unreel the static reel cable and connect to an
(1) Review instructions in paragraph 2-14. approved earth ground (fig. 2-7).

WARNING (5) Remove fire extinguishers and take them to

the point of operation.
Hose reel cabinet door Is heavy use two
hands when opening and closing. Use (6) Start engine (para 2-10) and when warm
latches to lock door. Do not slam. adjust engine speed to 1000-1200 rpm.

Figure 2-42. Diagram for Recirculating Fuel Using 2-inch Hose (M970 and M970A1).

2-48
 TM 9-2330-356-14

(7) Release lock (para 2-11) on the 2-inch hose g. Recirculation Operation With 1-inch Hose. This
reel and unreel all hose. Remove dust cap on the operation is used when the fuel in the tank must be refilt-
recirculation fitting (fig. 2-11), and connect single point ered. The fuel is recirculated through the filter/separator,
nozzle to the fitting. Open single point nozzle by turning meter, hose reel for the 1-inch hose, and recirculation
handle (fig. 2-34) on side of nozzle. fitting on side of tank (fig. 2-43). Operation instructions
are as follows:
(8) Open valves A (para 2-11f), H, M, and R.
NOTE
(9) Set engine throttle at desired flow rate
The converter (fig. 2-43) must be Installed
(table 2-2).
onto the overwing nozzle for this operation.
Remove spout from overwing nozzle and
NOTE install quick disconnect converter (fig. 2-44).
Air source must be available for deadman
operation. (1) Review instructions in paragraph 2-14.

(10) Unreel deadman control S. Squeeze the WARNING

trigger on deadman control to start fuel flow. Meter inlet
pressure gage should be indicating a minimum of 25 psi. If Hose reel cabinet door is heavy use two
a minimum of 25 psi is not indicated, shut down operation hands when opening and closing. Use
and contact unit maintenance. latches to lock door. Do not slam.

(11) At end of operation, release deadman control (2) Open hose reel cabinet door. Pull release
S and adjust engine to idle speed (1000-1200 rpm). cable and lift door with both hands.
Rewind the deadman control.
(3) Ensure that all valves are closed.
(12) Close the single point nozzle and disconnect
(4) Unreel the static reel cable and connect to an
nozzle from recirculation fitting. Replace dust cap on
approved earth ground (fig. 2-7).
recirculation fitting.
(5) Remove fire extinguishers and bring them to
(13) Evacuate hose (para 2-14d). point of operation.
(14) Rewind the 2-inch hose (para 2-11). Tighten (6) Start engine (para 2-10) and when warm
hose reel lock. adjust engine speed to 1000-1200 rpm.

(15) Close all valves and shut off engine (7) Release lock (para 2-11) on the 1-inch hose
(para 2-10d). reel, and unreel all hose. Remove the dust cap on the
recirculate ion fitting (fig. 2-12) and connect the converter
to the fitting.
WARNING
(8) Open valves A (para 2-11f), H, M, and F?
DO NOT let go of the static reel cable when
NOTE
rewinding until the ball stop is firmly touching
the reel. Failure to follow this warning may If 2-inch hose was used before using the
cause injury to personnel. 1-inch hose, depress and hold deadman
release plunger in the hose reel cabinet
(16) Disconnect the static reel cable from its (fig. 2-1 4) for 5-10 seconds to deactivate the
ground connection and rewind. deadman system. If this procedure Is not
followed, no fuel will flow to the 1-inch hose.

WARNING (9) Set engine throttle at desired flow rate

(table 2-2). Squeeze trigger on overwing nozzle.
Hose reel cabinet door is heavy use two
hands when opening and closing. Use (10) At end of operation, release the trigger on the
latches to lock door. Do not slam. overwing nozzle, and adjust engine to idle speed
(1000-1200 rpm).
(17) Close hose reel cabinet door and latch it in (11) Disconnect the overwing nozzle/converter
place. from the recirculation fitting. Reinstall dust cap to fitting.
(18) Store and cover fire extinguishers. (12) Evacuate hose (para 2-14d).

2-49
TM 9-2330-356-14

Figure 2-43. Flow Diagram for Recirculating Fuel Using 1-inch Hose (M970 and M970A1).

(13) Rewind the 1-inch hose (para 2-11). (16) Disconnect the static reel cable from its
Tighten hose reel lock. ground connection and rewind.
(14) Close all valves and shut off engine
(para 2-10).
WARNING
(15) Remove converter from overwing nozzle and
install spout to nozzle. Hose reel cabinet door is heavy-use two
hands when opening and closing. Use
latches to lock door. Do not slam.
WARNING

DO NOT let go of the static reel cable when (17) Close hose reel cabinet door and latch it in
rewinding until the ball stop is firmly touching place,
the reel. Failure to follow this warning may
cause injury to personnel. (18) Store and cover fire extinguishers.

2-50
 TM 9-2330-356-14

1. Remove spout from overwing nozzle. 2. Install quick disconnect converter.

Figure 2-44. Installing Converter Onto Overwing Nozzle.

2-19. Refuel on the Move (ROM) Assembly and NOTE
Operating Procedures (M969 and M969A1)
The number of fueling points to be connected
(Fig. 2-45)
and operated may vary. Additional hose
sections of the type provided in the kit maybe
connected to the basic ROM system for
WARNING additional reach if needed to satisfy special
deployment conditions.
Fuel handlers must wear appropriate safety
equipment during fueling operations to avoid d. Lay out ROM parts on ground per Instruction
injury. Drawing 12356089.

NOTE NOTE
Apply teflon tape to all male coupling threads.
Components of the Refuel Assembly Kit
(NSN 4730-01-295-1842) are listed In Reapply as needed during subsequent de-
Appendix D. ployments to ensure proper seal of connec-
tions.

a. Select refuel site and park fuel tank semitrailer at e. Attach parts, starting with large 4-inch tee, to the
right side of road. 4-inch hose from the fuel tank semitrailer. If equipped,
open valve on tee assemblies before operating.
b. Open Refuel on the Move (ROM) accessory
f. Remove dust caps and assemble parts. Ensure
container. Unpack instruction sheets and inventory sheet.
that camlock clamps hold parts together tightly.
Take inventoy of components of container.
g. Place fire extinguishers at refuel sites (8). Place a
c. Unload the three 4-inch hoses from hose troughs. ground rod at each refuel site and pound 18 inches into
Remove dust cap from valve B and the three hoses. ground with slide hammer on ground rod.
Connect the three hoses together and attach one end to
valve B. h. Place nozzles on ground rod handle.

2-51
 TM 9-2330-356-14
figure 2-45
2-52
 TM 9-2330-356-14

i. Obtain the (8) grounding wires from organic n. When deactivating refuel site:
equipment and attach one alligator clamp to ground rod.
Also, ensure that fuel tank semitrailer has been grounded. (1) Start engine and put fuel tank semitrailer into
Store unused plugs, dust caps, etc., in ROM defueling mode. Progressively open nozzles beginning
j. with those farthest from tanker using a drip container to
accessory container.
catch any spillage.
k. Prepare fuel tank semitrailer for filtered fuel bulk
unload (para 2-16). (2) Disassemble all components after draining
fuel back into tanker.
l. Start engine and raise speed to proper RPM.
Check ROM system for fuel leaks under pressure.
Correct leaks as necessary. (3) Stop engine. Replace vehicle hoses and dust
caps. Put dust caps and plugs on all ROM components and
m. Refuel convoy vehicles per mission requirements. stow in ROM accessory container. Refer to storage
Use ground rod wire to ground refueled vehicle. diagram on container.

Section III. OPERATION UNDER UNUSUAL CONDITIONS

2-20. General frozen to the ground, or frozen to the shape of the flat spot
while under-inflated must be considered. One or more
a. You must follow the approved practices and brake shoes may be frozen fast and may require
precautions. A detailed study of FM 21-305 and FM 55-30 preheating to avoid damage to the internal parts and brake
is essential for use of this material under unusual drums.
conditions.
c. Driving. Refer to FM 21-305 for special
b. For description of operations in extreme cold, instructions on driving hazards in snow, ice, and unusual
refer to FM 9-207. terrain encountered under extreme cold weather
conditions.
c. Under sandy, dusty, mud, water, or salt water
operating conditions, inspect, clean, and lubricate parts d. Engine Operation. Refer to paragraph 2-10 for
frequently. operating instructions of the engine in extreme cold
weather.
2-21. Extreme Cold Weather Operation
2-22. Extreme Hot Weather Operation
a. Drain Water. During cold weather operations, the
accumulated water in the semitrailer fueling system may a. Parking. When practical, park the semitrailer
freeze. It is important to drain the water from the entire under cover to protect it from sun, sand, and dust.
system after each operation to prevent damage to the
fueling system components (para 2-13 d ). Remove drain b. Engine Operation. Refer to paragraph 2-10 for
plug from engine fuel tank and drain any accumulated engine operating instructions in extremely hot weather.
water from tank.
c. Effects of Humidify. Vehicles parked for long
periods in hot, humid weather are subject to rapid rusting
WARNING and accumulation of fungus growth. Inspect often, clean,
and lubricate to prevent deterioration.
A warm air blower maybe used to preheat the
2-23. Operation on Unusual Terrain
brake shoes. Make sure the heater itself is at
least 50-ft from semitrailer to prevent fuel
a. Sand. Inspection, cleaning, and lubrication of
vapor from semitrailer entering blower
working parts must be made often when operating under
heating chamber. Failure to follow this
extremely dusty or sandy conditions. Wheel bearings
warning may result in serious injury or death
should be cleaned and repacked with lubricants as
to personnel.
specified on the lubrication order after operation under
extremely dusty or sandy conditions.
b. Frozen Parts. The driver must be alert to frozen
systems while pulling the semitrailer after shutdown. b. Rocky Terrain. Use extreme caution when
Congealed lubricants may cause failure of parts. Tires traveling over rocky terrain. Specified tire inflation should

2-53
TM 9-2330-356-14

be maintained to minimize the possibility of internal cables and terminals must be protected by spraying with
rupture of the tire and damage to the tube. ignition insulation compound.
c. Flooded Road Surfaces. When the unit is
subjected to flooded road surfaces, the vehicle can d. Salt Water Operation. Salt water causes corrosion
withstand a depth of 24-inches. However, wheel bearings of exposed parts. After operation is complete, wash with
should be cleaned and repacked if this happens. Electrical fresh water.

2-54
 TM 9-2330-356-14

CHAPTER 3
OPERATOR/CREW MAINTENANCE INSTRUCTIONS

Section I. LUBRICATION INSTRUCTIONS

3-1. Lubrication b. For instructions on lubrication in weather below

0F, refer to FM 9-207.
This section has lubrication requirements for the
semitrailers. c. For lubrication after fording, refer to TM 9-238.
a. For lubrication under usual conditions, refer to
figures 3-1 through 3-6 for general areas and lubrication d. After operating under dusty or sandy conditions,
intervals. Refer to figures 3-7 through 3-21 for specific clean and inspect all lubrication points for fouled
lubrication points. lubricants. Lubricate if fouled.

3-1
TM 9-2330-356-14

Figure 3-1. Lubrication Chart (M967) (Sheet 1 of 2).

3-2
 TM 9-2330-356-14

Figure 3-1. Lubrication Chart (M967) (Sheet 2 of 2).

Change 3 3-3
TM 9-2330-356-14

Figure 3-2. Lubrication Chart (M967A1) (Sheet 1 of 2).

3-4
 TM 9-2330-356-14

Figure 3-2. Lubrication Chart (M967A1) (Sheet 2 of 2).

Change 3 3-5
TM 9-2330-356-14

Figure 3-3. Lubrication Chart (M969) (Sheet 1 of 2).

3-6
 TM 9-2330-356-14

Figure 3-3. Lubrication Chart (M969) (Sheet 2 of 2).

Change 3 3-7
TM 9-2330-356-14

Figure 3-4. Lubrication Chart (M969A1) (Sheet 1 of 2).

3-8
 TM 9-2330-356-14

Figure 3-4. Lubrication Chart (M969A1) (Sheet 2 of 2).

Change 3 3-9
TM 9-2330-356-14

Figure 3-5. Lubrication Chart (M970) (Sheet 1 of 2)

3-10 Change 3
 TM 9-2330-356-14

Figure 3-5 Lubrication Chart (M970) (Sheet 2 of 2).

Change 3 3-11
TM 9-2330-356-14

Figure 3-6. Lubrication Chart (M970A1) (Sheet 1 of 2).

3-12 Change 3
 TM 9-2330-356-14

Figure 3-6. Lubrication Chart (M970A1) (Sheet 2 of 2).

Change 3 3-13
 TM 9-2330-356-14

TA099735

Figure 3-9. Location of Wheel Bearings (M967, M969, M970 except M970 SN TC-0843, TC-0844, and
TC-103 thru TC-178).

3-14 Change 3
 TM 9-2330-356-14

Figure 3-10. Engine and Landing Gear Lubrication Points.

Figure 3-11. Lubrication of Pick-up and Upper Coupler (Kingpin) Plate.

3-15
TM 9-2330-356-14

Figure 3-12. Lubrication of Centrifugal Pump.

Figure 3-13. Location of Hose Reel Hand Crank and Hose Reel Side Bearing Lubrication Points (M969 and M969A1).

3-16
 TM 9-2330-356-14

Figure 3-14. Location of Hose Reel Hand Crank and Hose Reel Side Bearing Lubrication Points (M970 and M970A1).

Figure 3-15. Location of Cabinet Door Hinges and Latches (M970 and M970A1).

3-17
 TM 9-2330-356-14

Figure 3-16. Location of Lubrication Fitting for Slack Adjuster (M967A1, M969A1, and M970A1 including
M970 SN TC-0843P TC-0844, and TC-103 thru TC-178).

Figure 3-17. Location of Brake Shoe Roller and Brake Anchor Pin (M967A1, M969A1, and M970A1 including
M970 SN TC-0843, TC-0844, and TC-103 thru TC-178).

3-18 Change 3
 TM 9-2330-356-14

Figure 3-18. Location of Lubrication Fitting for Slack Adjuster (M967A1, M969A1, and M970A1 including
M970 SN TC-0843, TC-0844, andTC-103thruTC-178).

Figure 3-19. Location of Lubrication Fitting for Slack Adjuster (M967A1, M969A1, and M970A1 including
M970 SN TC-0843, TC-0844, and TC-103 thru TC-178).

Change 3 3-19
 TM 9-2330-356-14

Figure 3-20. Location of Hose Reel Cabinet Door Hinges and Latches (M969 and M969A1).

Figure 3-21. Location of Control Panel Cover Hinge and Latch (M967A1, M969A1, and M970A1),

3-20
 TM 9-2330-356-14

Section Il. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)

3-2. Maintenance Forms and Records area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
Every mission begins and ends with paperwork. There NOT use near open flame or excessive heat.
isnt much of it, but you have to keep it up. The forms and The solvents flash point is 100F-138F
records you will fill out have several uses. They are a (38C-59C). If you become dizzy while
permanent record of the the services, repairs, and using cleaning solvent, immediately get fresh
modifications made on your vehicle. They are reports to air and medical help. If solvent contacts eyes,
unit maintenance and to your commander. And they area Immediately wash your eyes with water and
checklist for you when you want to know what is wrong get medical aid.
with the vehicle after its last use, and whether those faults
have been fixed. For the information you need on forms (1) Keep It Clean. Dirt, grease, oil, and debris only
and records, see DA Pam 738-750. get in the way and may cover up a serious problem. Clean
as you work and as needed. Use dry cleaning solvent (item
3-3. Preventive Maintenance Checks and 11, Appendix E) on all metal surfaces. Use soap and water
Services when you clean rubber or plastic material.

a. Always pay attention to the WARNINGS and (2) Bolts, Nuts, and Screws. Check them all for
CAUTIONs while doing the PMCS checks. obvious looseness, missing, bent, or broken condition. You
cant try them all with a tool, of course, but look for
b. Do your BEFORE (B) PREVENTIVE MAIN- chipped paint, bare metal, or rust around bolt heads. If you
TENANCE just before you operate the vehicle. find one you think is loose, tighten it, or report it to unit
maintenance if you cant tighten it.
c. Do your DURING (D) checks and services (3) Welds. Look for loose or chipped paint, rust,
PREVENTIVE MAINTENANCE while the equipment or gaps where parts are welded together. If you find a bad
and/or its component systems are in operation. weld, report it to unit maintenance.
d. Do your AFTER (A) PREVENTIVE MAINTE- (4) Electric Wires and Connectors. Look for
NANCE right after operating the vehicle. cracked or broken insulation, bare wires, and loose or
broken connectors. Tighten loose connectors and make
e. Do your WEEKLY (W) PREVENTIVE MAIN- sure wires are in good shape.
TENANCE once a week.
(5) Hoses and Fluid Lines. Look for wear, damage,
Do your MONTHLY (M) PREVENTIVE and leaks, and make sure clamps and fittings are tight. Wet
f.
MAINTENANCE once a month. spots show leaks, of course, but a stain around a fitting or
connector can also mean a leak. If a leak comes from a
If something doesnt work, troubleshoot it with loose fitting or connector, tighten it. If something is
g.
the instructions in this manual, or notify your supervisor. broken or worn out, report it to unit maintenance.
k. You must know how fluid leakage affects the
h. Always do your PREVENTIVE MAINTE- status of your vehicle. The following are definitions of the
NANCE CHECKS in the same order so that it gets to be a types/classes of leakage you need to know to be able to
habit. Once youve had some practice, youll spot anything determine the status of your vehicle. Learn, then be
wrong in a hurry. familiar with them and REMEMBER: WHEN IN
DOUBT NOTIFY YOUR SUPERVISOR!
i. If anything looks wrong and you cant fix it, write it
on your DA Form 2404. If you find something seriously Leakage Definitions for Crew/Operator PMCS
wrong, report it to unit maintenance RIGHT NOW.
CLASS I Seepage of fluid (as indicated by wetness
j. When you do your PREVENTIVE MAINTE- or discoloration) not great enough to
NANCE, take along the tools you need to make all the form drops.
checks. Youll always need a rag or two. CLASS II Leakage of fluid great enough to form
drops but not great enough to cause
drops to drip from item being checked/
WARNING inspected.
Dry cleaning solvent P-D-680 is toxic and CLASS III Leakage of fluid great enough to form
flammable. Always wear protective goggles drops that fall from the item being
and gloves, and use only in a well-ventilated checked/inspected.

3-21
TM 9-2330-356-14

CAUTION

Equipment operation is allowable with minor leaks (Class I or II). Of course, consideration must be
given to the fluid capacity in the item/system being-checked/inspected. When in doubt, notify your
supervisor.
Table 3-1. Operator/Crew Preventive Maintenance Checks and Services.
B-Before D-During A-After W-Weeklv. M-Month
INTERVAL ITEM TO BE INSPECTED
ITEM PROCEDURE Check for and have repaired, Equipment Is Not
NO. B D A w M Ready/Available It
filled or adjusted as needed.

NOTE
Perform weekly as well as before PMCS if:
a. You are the assigned operator but have not
operated vehicle since last weekly.
b. You are operating vehicle for the first time.
MAKE THE FOLLOWING WALK AROUND
CHECKS:
1 Exterior of Vehicle.
a. Check for evidence of fuel leakage on or Any fuel leakage is evident.
under semitrailer.
b. Check fire extinguishers for proper gage Fire extinguisher missing. Red
readings and check security of mounting brackets. button is up.
Red button should be down.

2 Tires and Wheels.

a. Inspect tires for unusual wear or damage. Tires have damage which
could result in tire failure.
b. Check for proper air pressure.
Hard road surfaces 60 psi.
Cross country and sand 40 psi.
c. Inspect wheels for cracks or other damage. Wheel damaged or wheel nuts
Check tightness of wheel nuts. missing.

3 Towing Connections.
a. Inspect bolt-on kingpin or upper coupler Bolt-on kingpin or upper cou-
(kingpin) plate for damage or loose mounting bolts. pler (kingpin) plate damaged,
or mounting bolts loose.
b. Visually inspect for obvious cracked or Any welds are cracked o r
broken welds along upper coupler (kingpin) plate. broken.
c. Connect towing vehicle air lines to couplings Air leaks are evident.
on semitrailer. With towing vehicle engine running,
check air lines and couplings for air leaks.
d. Connect towing vehicle electrical line to Turn signal and stop lights not
receptacle on semitrailer. Check all lights for operating. Towing vehicle in-
damage. Check that all lights are operating. if not tervehicular cable is damaged
operating, check tightness of connection at (cuts, cracks, broken wires,
receptacle. if tight, have unit maintenance test and etc.).
repair lights. Check electrical line for damage.

3-22
 TM 9-2330-356-14

Table 3-1. Operator/Crew Preventive Maintenance Checks and Services (Cont).

B-Before D-During A-After W-Weekly M-Monthly

INTERVAL ITEM TO BE INSPECTED Equipment Is Not
ITEM PROCEDURE: Check for and have repaired,
NO. B D A W M Ready/Available If:
filled or adjusted as needed.

4 Landing Gear.
a. Inspect for loose shoes, bent or damaged Mounting bolts loose or miss-
landing gear legs, and loose or missing mounting ing.
bolts.
b. After coupling towing vehicle to semitrailer, Landing gear legs cannot be
enage landing gear handle, and raise and lower raised or lowered.
landing gear legs.

5 Piping System.
a. Inspect all pipes for dents and cracks Pipes are damaged to an
extent that fuel flow will be
restricted. Pipes are cracked
allowing fuel leakage.
b. Check all valves and couplings for leaks. Leaks are evident.
c. Check valves for proper operation. Valve is hard to open or close.
d. Drain water from piping system (para 2-13d).

6 Hose Troughs.
a. Inspect troughs for debris. Remove any
debris found and check that water drain holes are
open.
b. Visually inspect hose lock bars for obvious
damaged or missing parts.

7 Control Panel.
a. Check switches for proper operation. Switch does not complete its
function.
b. Check that preheat indicator light is lit when Gage is not functioning
engine is preheating. properly.

c. Check gages for proper operation. Gages

should read as follows:
Voltmeter 1214V with engine running,
Oil pressure gage 3040 psi with engine
warm and running.
Fuel pressure gage 1214 psi.
Pump pressure gage: Pump pressure gage is not
30 psi for 4-inch low-head pump functioning properly during
(M967, M967A1, M969, and M969A1). retail (pumping) operations.
65 psi for 3-inch high pressure pump
(M970 and M970A1).
d. Check filter/separator gage. Gage indicates 20 psi or high-
er.

3-23
 TM 9-2330-356-14

Table 3-1. Operator/Crew Preventive Maintenance Checks and Services (Cont).

B-Before D-During A-After W-Weekly M-Monthly

ITEM TO BE INSPECTED Equipment Is Not
PROCEDURE Check for and have repaired, Ready/Available If:
filled or adjusted as needed.

Tank.
a. Inspect tank shell for dents and leaks. Tank shell has leaks.
b. Check for leaks around fusible vent caps. Leaks are evident.
Tighten caps if loose.
c. Check for leaks around manhole cover. If Manhole cover gasket is dam-
leaks are evident, check for damaged cover aged.
gasket, loose mounting ring, and that cover is
securely latched.

Catwalk Drains.
Inspect for clogged drains. Remove foreign matter.

Emergency Valve and Vent.

Esure that all valves are closed. Operate control Control lever A will not actuate
ever A and ensure that the cable is actuating the emergency valve lever, or vent
emergency valve lever and opens the vent on top of fails to open.
semitrailer.

Emergency Valve Shut-off.

Ensure that all valves are closed. Move control Control lever A does not move
ever A to the OPEN position. On the front curbside to the CLOSED position.
of the semitrailer, pull the emergency valve shut-off
control. Observe that control lever A has moved to
he CLOSED position.

Cabinet Door Shut-off (M970 and M970A1).

Ensure that all valves are closed. Open the hose Control lever A does not move
reel cabinet door. Move control lever A to the OPEN to the CLOSED position.
position. Close the cabinet door and observe that
control lever A moves to the CLOSED position.

Brake System.
a. With towing vehicle coupled to semitrailer,
apply semitrailer brakes and inspect all air lines
and fittings for leaks.
b. Apply semitrailer brakes and observe Brakes do not stop semitrailer,
operation. or semitrailer pulls to one side.
c. Drain water from both air reservoirs by
opening the air reservoir drain cocks.

3-24
 TM 9-2330-356-14

Table 3-1. Operator/Crew Preventive Maintenance Checks and Services (Cont).

B-Before D-During A-After W-Weekly M-Monthly

INTERVAL ITEM TO BE INSPECTED Equipment Is Not
ITEM PROCEDURE Check for and have repaired,
NO. B D A W M Ready/Available If:
filled or adjusted as needed.

14 Rear Axles.

During movement of semitrailer, be aware of Semitrailer wanders, has side

wander or side pull. Listen for excessive noise. pull, or axles have excessive
These are indications of improper axle alinement. noise.

15 Suspension.
a. Visually inspect bogie for obvious damage or Class Ill leakage.
leaks.
b. Inspect springs for broken leaves.
c. Visually inspect torque rods and running gear Loose or missing running gear
hardware for obvious damage. hardware.

16 Batteries.
Remove battery cover. Check electrolyte level in Battery is damaged.
each cell. If low, add distilled water. Check for
corrosion. Check for damage.

17 Battery Cables and Terminals.

Check for corrosion at terminals. Check cable

tightness on terminals. Check for cable damage.

18 Engine Assembly.

a. Drain water from both fuel filters. Loosen, but Engine does not operate if
do not remove drain plug at bottom of filter. Allow required for mission.
fuel to drain until clear of water. Tighten drain plug.
b. Check that red area is not visible in air cleaner Dirt indicator has red area
dirt indicator. Remove and clean engine air cleaner visible.
element, if required. Replace after six cleanings or
annually.
c. Listen for excessive engine noise which
indicates the muffler or exhaust pipes need
replacing.
d. Visually inspect for loose engine cowling or
shrouding.
e. Inspect for debris in grille of air cooling intake
area.

3-25
TM 9-2330-356-14

Table 3-1. Operator/Crew Preventive Maintenance Checks and Services (Cont).

B-Before D-During A-After W-Weekly M-Monthly

INTERVAL ITEM TO BE INSPECTED Equipment Is Not
ITEM PROCEDURE: Check for and have repaired,
NO. B D A W M Ready/Available If:
filled or adjuated as needed.

19 Filter/Separator (M969, M969A1, M970, and

M970A1).
a. Check automatic drain valve on bottom of Fuel is seeping from automatic
filter/separator for fuel seepage. No other liquid drain valve.
except water should be detected at the automatic
drain valve.
b. Check for debris in relief valve at top of Relief valve is plugged.
filter/separator (fig. 2-13).

20 Centrifugal Pump.
a. Remove pipe plug and check oil level. Add oil
if below bottom of pipe plug hole.
b. Inspect pump for signs of leaks around Pump is leaking,
gasket.

21 Hose Reels (M969, M969A1, M970, and

M970A1).
a. Check that rewind handle is not missing. Rewind handle is missing.
b. When unwinding hoses, observe for binding Hose reel will not unwind hose.
in the hose reel.
c. Inspect hoses for cuts and cracks. Cuts or cracks in hoses which
allow any detectable leakage.

22 Meter Indicator (M969, M969A1, M970, and

M970A1).
Check meter for registration of fuel being
dispensed.

23 Precheck Control.

Check operation of shut-off float. Precheck system does not

operate. Control lever does not
move freely from closed to
open position.

24 Load/Unload Selector System (M967, M967A1,

M969, and M969A1).
Check operation of selector control. Selector system does not
operate. Control lever does not
move freely from closed to
open position.

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Table 3-1. Operator/Crew Preventive Maintenance Checks and Services (Cont).

B-Before D-During A-After W-Weekly M-Monthly

INTERVAL ITEM TO BE INSPECTED Equipment Is Not
ITEM PROCEDURE: Check for and have repaired,
NO. B D A W M Ready/Available If:
filled or adjusted as needed.

25 Deadman Control (M970 and M970A1).

a. Unwind deadman control hoses and check Hose will not unwind or binding
for operation of hose reel. is noticed in the hose reel when
unwinding or rewinding hose.

b. Inspect for damage to the control and hoses. Leaks are evident at connec-
Check for leaks when operating the control. tions.

26 Deadman Gage.

a. Check deadman gage for damage (fig. 2-15).

b. Check at what pressure the 3-inch control
valve opens. Pressure gage should read 80 psi.

27 Nozzles.
Clean screens.

28 Grounding Devices.
a. Check static reel operation. Inspect for Missing or loose hardware.
missing grounding clips and loose or missing
mounting hardware.
b. Check portable grounding rod to ensure that it Missing from vehicle or dam-
is not damaged or missing. aged.

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TM 9-2330-356-14

Section Ill. TROUBLESHOOTING

3-4. General b. This manual cannot list all malfunctions that may
occur, nor all tests, inspections, or corrective actions. If a
malfunction is not listed or is not corrected by listed
a. This section contains troubleshooting informa-
corrective actions, notify unit maintenance.
tion for locating and correcting the operating troubles that
may develop in the semitrailers. Each malfunction for an
individual component unit or system is followed by a list of NOTE
tests or inspections that will help you determine corrective Before you use this table, ensure that you
actions to take. You should perform the test/inspections have performed all applicable operational
and corrective actions in the order listed in table 3-2. preventive maintenance checks.

Table 3-2. Operator/Crew Troubleshooting.

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

ELECTRICAL SYSTEM

1 . ALL LAMPS DO NOT LIGHT.

Step 1. Check light switch in towing vehicle for proper setting.

Set light switch to correct position.

Step 2. Check fuse in towing vehicle.

If fuse is blown, contact unit maintenance.

Step 3. Check if intervehicular cable is properly plugged into receptacle on semitrailer and towing vehicle.

Pull cable plug out and reinsert tightly in receptacle.

Step 4. Check for dirty or corroded contacts in receptacle or on plug of intervehicular cable.

a. Pull cable plugs and check for dirt or corrosion.

b. Clean plugs and receptacle.

c. Reinsert plugs into receptacles.

2. ONE OR MORE LAMPS (BUT NOT ALL) WILL NOT LIGHT.

Step 1. Check for damaged tail or marker light.

If lights require replacement or repair, notify unit maintenance.

Step 2. Check for dirty or corroded contacts in receptacle or on plugs of intervehicular cable.

a. Pull cable plugs and check for dirt or corrosion.

b. Clean plugs and receptacle.

c. Reinsert plugs into receptacles.

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Table 3-2. Operator/Crew Troubleshooting (Cont).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

ELECTRICAL SYSTEM (Cont)

3. DIM OR FLICKERING LIGHTS.

Check for dirty or corroded intervehicular cable plugs and receptacles.

Refer to Step 2 under Malfunction 2, ONE OR MORE LAMPS (BUT NOT ALL) WILL NOT
LIGHT.

BRAKES

4. BRAKES WILL NOT RELEASE.

Step 1. Check if brake valve on towing vehicle is in applied position.

Move brake valve to the released position.

Step 2. Check if shut-off valves are closed on towing vehicle.

Open valves.

Step 3. Check if air hose couplings are improperly connected to semitrailer.

Remove couplings and reconnect properly.

Step 4. Check for dented or cracked air lines in the Emergency Line.

If lines are damaged, notify unit maintenance.

Step 5. Check if rear air reservoir tank drain valve is open (fig. 2-2).

If semitrailer is coupled to towing vehicle, close the drain valve.

Step 6. M970 and M970A1 only. Make sure piping cabinet door is tightly shut.

5. NO BRAKES OR WEAK BRAKES.

Step 1. Check if shut-off valves are closed on towing vehicle.

Open valves.

Step 2. Check if air hose couplings are improperly connected to semitrailer.

Remove couplings and reconnect properly.

Step 3. Check for bent or dented air lines in the Service Line.

If lines are bent or dented, notify unit maintenance.

3-29
TM 9-2330-356-14

Table 3-2. Operator/Crew Troubleshooting (Cont).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

BRAKES (Cont)

6. SLOW BRAKE APPLICATION OR SLOW RELEASE.

Check for bent or dented air lines.

If lines are bent or dented, notify unit maintenance.

7. GRABBING BRAKES.

Check for moisture in rear air reservoir.

Drain rear reservoir (fig. 2-2).

TIRES

8. EXCESSIVELY WORN, SCUFFED, OR CUPPED.

Step 1. Check tire pressure.

Inflate to 60 psi for hard surface roads, and 40 psi for cross-country or sand.

Step 2. Check for loose wheels.

Tighten wheel stud nuts.

Step 3. Check for bent wheel.

If bent, notify unit maintenance.

LANDING GEAR

9. DIFFICULTY IN TURNING OPERATING CRANK.

Check if lower leg is bent.

a. If bend is not readily apparent, check to determine whether lower leg will center in vari-
ous positions.

b. If bent, notify unit maintenance.

3-30
 TM 9-2330-356-14

Table 3-2. Operator/Crew Troubleshooting (Cont).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

ENGINE

10. ENGINE WILL NOT TURN OVER.

Step 1. Remove battery cover and check for loose battery cable connections (para 3-6).

Tighten loose connections.

Step 2. Check for discharged or defective battery.

a. Remove cell caps and check for loss of electrolyte. Fill each cell as necessary
(para 3-6).

NOTE
Do not slave start or jump start batteries.

b. If battery is discharged, notify unit maintenance.

11. ENGINE HARD TO START OR TURNS OVER SLOWLY.

Step 1. Remove battery cover and check for discharged or defective battery.

a. Remove cell caps and check for loss of electrolyte, Fill each cell as necessary
(para 3-6).

NOTE
Do not slave start or jump start batteries.

b. If battery is discharged, notify unit maintenance.

Step 2. Check air cleaner dirt indicator for showing of red band.

If red band is showing, service air cleaner (para 3-1 8).

Step 3. Check for fuel line leaks.

If connections are loose or lines are damaged, notify unit maintenance.

12. ENGINE TURNS OVER BUT FAILS TO START

Check level of fuel in fuel tank.

Add fuel.

3-31
TM 9-2330-356-14

Table 3-2. Operator/Crew Troubleshooting (Con't).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

ENGINE (Cont)

13. ENGINE MISFIRES AT HEAVY LOAD.

Step 1. Check air cleaner dirt indicator for showing of red band.

If red band is showing, service air cleaner (para 3-1 8).

Step 2. Check for fuel line leaks.

If connections are loose or lines are damaged, notify unit maintenance.

14. LOWER ENGINE POWER.

Step 1. Check air cleaner dirt indicator for showing of red band.

If red band is showing, service air cleaner (para 3-1 8).

Step 2. Check for fuel line leaks.

If connections are loose or lines are damaged, notify unit maintenance.

15. LOW OIL PRESSURE INDICATED ON GAGE (MINIMUM 20 psi).

Step 1. Check oil level.

Add oil, if necessary.

Step 2. Check gage for damage.

If gage is damaged, notify unit maintenance.

Step 3. Check for kinked or bent tubing between oil pressure gage and engine.

If kinked or bent tubing is found, notify unit maintenance.

FUELING OPERATIONS

16. FUEL DOES NOT FLOW DURING ANY NONFILTERED FUELING OPERATION.

Step 1. Check if emergency valve is open.

Open valve by operating emergency valve control A. If control does not function, notify unit
maintenance.

Step 2. Check that proper valves are open.

Refer to Flow Diagram pertaining to fueling operation being performed.

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 TM 9-2330-356-14

Table 3-2. Operator/Crew Troubleshooting (Cont).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

FUELING OPERATIONS (Cont)

16. FUEL DOES NOT FLOW DURING ANY NONFILTERED FUELING OPERATION (Cont).

Step 3. Check for clogged screen in nozzle (paras 3-14,3-15, and 3-16).

Clean or replace screen.

17. FUEL DOES NOT FLOW DURING ANY FILTERED FUELING OPERATION (M969, M969A1, M970, and
M970A1).

Step 1. Check if emergency valve is open.

Open valve by operating emergency valve control A. If control does not function, notify unit
maintenance.

Step 2. Check that proper valves are open.

Refer to Flow Diagram pertaining to fueling operation being performed.

Step 3. Check if there is too much water in filter/separator.

Drain filter/separator sump (para 2-13d).

Step 4. Check reading of filter/separator gage.

A reading above 25 psi indicates fuse replacement is necessary. Notify unit maintenance.

Step 5. Check for improperly connected nozzle or faulty nozzle.

a. If improperly connected, connect nozzle properly.

b. If faulty, notify unit maintenance.

Step 6. Check for clogged screen in nozzle (paras 3-14 through 3-17).

Clean or replace screen.

18. FUEL DOES NOT FLOW DURING ANY OVERWING FUELING OPERATION (M970 and M970A1).

Step 1. Complete Steps 1 through 5 under Malfunction 17, FUEL DOES NOT FLOW DUR/NG ANY F/LTERED
FUELING OPERAT/ON.

Step 2. Check if deadman control is deactivated.

a. If 2-inch hose was used before the 1-inch hose, depress deadman control S and
release it.

b. Depress and hold the deadman release plunger in the hose reel cabinet (fig. 2-15) for
5-10 seconds to deactivate the deadman system.

3-33
TM 9-2330-356-14

Table 3-2. Operator/Crew Troubleshooting (Cont),

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

FUELING OPERATIONS (Cont)

18. FUEL DOES NOT FLOW DURING ANY OVERWING FUELING OPERATION (M970 and M970A1) (Cont).

Step 3. Check for clogged screen in nozzle (para 3-1 5).

Clean or replace screen.

19. FUEL DOES NOT FLOW DURING ANY UNDERWING FUELING OPERATION (M970 and M970A1).

Step 1. Complete Steps 1 through 5 under Malfunction 17, FUEL DOES NOT FLOW DUR/NG ANY FILTERED
FUELING OPERATION.

Step 2. Check if deadman actuator was not depressed or is inoperable.

NOTE
Connect towing vehicle to build up air pressure. Deadman will not function without outside air
source.

a. Depress deadman actuator S to resume flow to meter.

b. Check deadman hoses for kinks, Straighten kinks.

c. Check deadman hoses for breaks or loose connections. Notify unit maintenance if any
are found.

Step 3. Check for clogged screen in nozzle (para 3-17).

Clean or replace screen.

Section IV. MAINTENANCE PROCEDURES

3-5. General Dirt, combined with electrolyte or moisture on top of

battery, can result in a continuous battery discharge.
This section provides maintenance instructions for those
items which are the responsibility of the operator/crew, a. Inspection Steps and Services.
The maintenance functions are limited to those
operations that are authorized by the Maintenance
(1) Remove the two wingnuts and washers
Allocation Chart (MAC), Appendix B of this manual.
(fig. 3-22) that secure the battery cover to the battery hold
3-6. Batteries, Terminals, and Cables down bracket. Remove the battery cover.

The battery terminals and cables should be inspected for (2) Inspect battery area for excessive dirt and
excessive dirt and corrosion, loose connections, and corrosion. Clean battery area using instructions in b
damage each time before the vehicle is put into operation. below.

3-34
 TM 9-2330-356-14

b. Maintenance Instructions.

(1) Cleaning Battery Area. Use baking soda or

ammonia, then flush battery and cables with water.

NOTE
Add distilled water only. Do not add electro-
lyte.

(2) Filling Battery Cells. Add distilled water to

each cell until the fluid level rises to just below the ring at
the bottom of the cell opening. Do not overfill. Too much
water can cause poor performance and corrosion around
the battery.

3-7. Air Reservoirs

a. Draining Water From Reservoir. The reservoirs are

located beneath the semitrailer in front of the axles
(fig. 2-2). Both air reservoirs have a drain cock for removal
of water from the tanks. Open each drain cock every day
Figure 3-22. Battery With Cover Installed. and allow water to flow out. Then, close the drain cocks.

(3) Check cables (fig. 3-23) for frayed insulation. b. Inspect. Check that mounting screws holding the
If insulation is worn or frayed, notify unit maintenance. reservoirs are tight and that brackets and water drain
cocks are not bent or damaged. Notify unit maintenance if
any parts need replacing or tightening.
(4) Check for loose terminals. Tighten if loose.
3-8. Hose Troughs
(5) Remove vent fill covers and check electrolyte
level. Electrolyte level must be just below the ring at the a. Cleaning. Dirt and water may collect in the hose
bottom of each cell opening. If electrolyte level is low, fill troughs after a period of time. Remove the hoses from the
using instructions in paragraph 3-6 b. troughs and remove any debris. Check that water drain
holes are open.
(6) Install cover with two wingnuts and washers. b. Inspect. Check hose troughs for damage and
missing parts. If found, notify unit maintenance.

3-9. Cabinets and Cabinet Doors

a. Piping Assembly.

(1) Cleaning. Remove daily any dirt and debris

that may collect in the piping assembly.

(2) Inspect. Report any damage to the piping

control to unit maintenance.

b. Hose Reel Cabinet (M969, M969A1, M970, and

M970A1).

(1) Cleaning. Remove daily any dirt and debris

that may collect in the hose reel cabinet.

(2) Inspect. Report any damage to the hose reel

cabinet to unit maintenance.

(3) Lubrication. Lubricate the cabinet door

hinges and latches weekly with engine oil (Section I,
Figure 3-23. Battery With Cover Removed, Chapter 3).

3-35
TM 9-2330-356-14

3-10. Hose Reels

a. Hose Reef Hoses. After a hose reel hose is

unreeled from the hose reel for a fuel servicing operation,
visually check the hose for damage. If damage is noticed,
notify unit maintenance.

b. Lubrication. Lubricate the hose reel side bearings

and the hose reel handcrank operation shafts weekly
(Section I, Chapter 3).

3-11. Tool Box

a. Cleaning. Periodically clean tool box of dirt and

debris. Make sure drain holes are open.

b. Inspect. Inspect tool box cover and tool box for

damage. Report any damage to unit maintenance.

3-12. Filter/Separator Sump

Drain water from filter/separator after each period of

operation (para 2-13 d).

3-13. Reassembling Breakaway Fitting (M970 and

M970A1)

NOTE Figure 3-25. Installing New Shear Pins in

Installation of shear pins may be done with- Breakaway Fitting.
out removing connector from vehicle. 3-14. Vehicle Nozzle (M969 and M969A1)

a. Retract sleeve and remove broken shear pin a. Service. The screen in the nozzle (fig. 3-26) must
segments (fig. 3-24). be cleaned periodically and whenever flow is restricted
through nozzle.

(1) Unscrew spout (fig. 3-26) from nozzle.

(2) Remove screen from within the spout.

WARNING

Dry cleaning solvent P-D-680 is toxic and

flammable. Always wear protective
goggles and gloves, and use only in a well-
ventilated area. Avoid contact with skin,
eyes, and clothes, and DO NOT breathe va-
pors. DO NOT use near open flame or ex-
Figure 3-24. Removing Broken Shear Pins in cessive heat. The solvents flash point is
Breakaway Fitting. 100F-138F (38C-59C). If you be-
come dizzy while using cleaning solvent,
b. Remove three new shear pins from compartment Immediately get fresh air and medical help.
under external O-ring (fig. 3-25). If solvent contacts eyes, Immediately wash
your eyes with water and get medical aid.
c. Retract sleeve, push connector halves together
and hold. Insert pins in three holes until flush (pins must Compressed air used for drying or clean-
engage race in mating half). Sleeve will then slide forward ing purposes must not exceed 30 psi
and cover pins. (207 kPa). Wear protective clothing

3-36
 TM 9-2330-356-14

(goggles and gloves) and use caution to WARNING

avoid injury to personnel.
Dry cleaning solvent P-D-680 is toxic and
(3) Clean the screen in dry cleaning solvent flammable. Always wear protective
(item 11, Appendix E). Use compressed air to dry screen goggles and gloves, and use only in a well-
and to remove any excess material. ventilated area. Avoid contact with skin,
eyes, and clothes, and DO NOT breathe va-
(4) Replace screen in spout and then replace pors. DO NOT use near open flame or ex-
spout on nozzle. cessive heat. The solvents flash point is
100F-138F (38C-59C). If you be-
b. Nozzle Replacement. Should nozzle need come dizzy while using cleaning solvent,
replacement, notify unit maintenance. immediately get fresh air and medical help.
If solvent contacts eyes, Immediately wash
your eyes with water and get medical aid.
Compressed air used for drying or clean-
ing purposes must not exceed 30 psi
(207 kPa). Wear protective clothing
(goggles and gloves) and use caution to
avoid injury to personnel.

(3) Clean the screen in dry cleaning solvent

(item 11, Appendix E). Use compressed air to dry screen
and to remove any excess material.

(4) Replace screen in spout and then replace

spout on nozzle.

b . Removal.

(1) Move ring (fig. 3-27) on coupler back toward

(2) Pull nozzle from hose.

Figure 3-26. Removal of Screen.

3-15. Overwing Nozzle (M970 and M970A1)

a. Service. The screen in the nozzle (fig. 3-26) must

be cleaned periodically and whenever flow is restricted
through nozzle.

(1) Unscrew spout (fig. 3-26) from nozzle.

Figure 3-27. Removal of Overwing Nozzle.
(2) Remove screen from within the spout.

3-37
TM 9-2330-356-14

c. Installation. come dizzy while using cleaning solvent,

immediately get fresh air and medical help.
(1) Move ring (fig. 3-27) on coupler back toward If solvent contacts eyes, Immediately wash
hose. your eyes with water and get medical aid.

(2) Install nozzle into coupler and release ring. Compressed air used for drying or
cleaning purposes must not exceed 30 psi
(3) Check for proper connection by trying to pull (207 kPa). Wear protective clothing
the nozzle by hand from the hose. (goggles and gloves) and use caution to
avoid injury to personnel.
3-16. Closed-Clrcult Nozzle (M970 and M970A1)
(3) Clean screen in dry cleaning solvent (item 11,
a. Service. The screen in the nozzle must be cleaned Appendix E). Use compressed air to remove any excess
periodically and whenever flow is restricted through material and to dry the screen.
nozzle.
b. Removal.
(1) Remove nozzle (para 3-16).
(1) Move ring (fig. 3-29) on coupler back toward
(2) Locate screen (fig. 3-28) in inlet of nozzle and hose.
unscrew screen from nozzle.
(2) Pull nozzle from hose.

c. Installation.
(1) Move ring (fig. 3-29) on coupler back toward
hose.

(2) Install nozzle into coupler and release ring.

(3) Check for proper connection by trying to pull,

by hand, the nozzle from the hose.

Figure 3-28. Removal of Screen From

Closed-Circuit Nozzle.

WARNING

Dry cleaning solvent P-D-680 is toxic and

flammable. Always wear protective
goggles and gloves, and use only In a well-
ventilated area. Avoid contact with skin,
eyes, and clothes, and DO NOT breathe va-
pors. DO NOT use near open flame or ex-
cessive heat. The solvents flash point is
100F-138F (38C-59C). If you be- Figure 3-29. Removal of Closed-Circuit Nozzle.

3-38
 TM 9-2330-356-14

3-17. Underwing Nozzle (M970 and M970A1) (3) Clean the screen in dry cleaning solvent
(item 11, Appendix E). Use compressed air to remove any
a. Service. The screen in the nozzle must be cleaned excess material and to dry the screen.
periodically and whenever flow is restricted through the
nozzle. b . Removal.

(1) Remove nozzle (see b below). (1) Move red sleeve (fig. 3-31) on coupling
toward nozzle. Then move red and silver sleeves
(fig. 3-31) back toward hose.
(2)Unscrew adapter (fig. 3-30) from nozzle and
remove screen.
(2) Remove nozzle from coupling.

c . Installation.

(1) Install nozzle into coupler.

(2) Move silver sleeve (fig. 3-31) on coupling

toward nozzle.

(3) Check for proper connection by trying to pull

the nozzle by hand from the hose.

Figure 3-30. Removal of Screen From Underwing Nozzle.

WARNING

Dry cleaning solvent P-D-680 is toxic and

flammable. Always wear protective
goggles and gloves, and use only in a well-
ventilated area. Avoid contact with skin,
eyes, and clothes, and DO NOT breathe va- Figure 3-31. Removal of Uderwing Nozzle
pors. DO NOT use near open flame or ex- (M970 and M970A1).
cessive heat. The solvents flash point is
100F-138F (38C-59C). If you be- 3-18. Servicing Air Cleaner (fig. 3-32)
come dizzy while using cleaning solvent,
immediately get fresh air and medical help. CAUTION
If solvent contacts eyes, immediately wash
your eyes with water and get medical aid.
Do not run engine if red band is showing in
Compressed air used for drying or clean- restriction Indicator. Damage to engine could
ing purposes must not exceed 30 psi result.
(207 kPa). Wear protective clothing
(goggles and gloves) and use caution to a. Service air cleaner whenever the restriction
avoid injury to personnel. indicator (fig. 3-32) shows a red band.

3-39
TM 9-2330-356-14

Wear protective clothing (goggles and

gloves) and use caution to avoid injury to
personnel.

f . Remove the rain cap and clean with compressed

air.

g. Replace baffle in end cap.

h. Clean filter element. After six cleanings or

annually, have unit maintenance obtain a replacement
filter element.

i. Install new or cleaned filter element in air

cleaner body. Fasten in place with washer and wingnut.

j. Replace filter end cap. Ensure that the portion of

the end cap marked TOP is at the top. Secure end cap by
tightening clamp.

Figure 3-32. Engine Air Cleaner Restriction Indicator.

b. To service the filter, loosen clamp (fig. 3-33) and

remove end cap.

CAUTION

Never run engine with filter or dust collector

removed. Damage to engine could result.

c. Unscrew the wingnut and washer and remove the

element.

d. Remove baffle from end cap and remove any

accumulated dirt.

e. Use a clean rag to wipe clean the interior of air

cleaner and end cap.

WARNING

Compressed air used for drying or cleaning

purposes must not exceed 30 psi (207 kpa). Figure 3-33. Exploded View of Air Cleaner.

3-40
 TM 9-2330-356-14

CHAPTER 4
UNIT MAINTENANCE INSTRUCTIONS

Section I. SERVICE UPON RECEIPT OF MATERIAL

4-1. Inspecting and Servicing the Equipment

WARNING

a. General. When material is received by the using DO NOT climb into tank unless Interior of tank
organization, it is the responsibility of the officer in charge has been drained and purged and an
to determine whether the material has been properly explosive meter check indicates that It is safe
prepared for service by the supplying organization and to to do so. Adequate forced air ventilation or
be sure it is in condition to perform its function. Whenever self-contained breathing apparatus must be
practical, the operator/crew will assist unit maintenance used. Person entering tank must have an
personnel in the performance of these services. Semites attached lifeline. An observer must be
to be performed are listed below. stationed at the manhole opening so that
assistance may be summoned in the event of
an emergency. Failure to follow this warning
may result in serious injury or death to
WARNING
personnel.

Dry cleaning solvent P-D-680 Is toxic and

CAUTION
flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated
Do not use abrasive powder, steel wool, or
area. Avoid contact with skin, eyes, and
other material that will scratch the inside
clothes, and DO NOT breathe vapors. DO
surfaces of the tank.
NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F
(38C-590C). If you become dizzy while (b) Make sure another person is standing by
using cleaning solvent, immediately get fresh before you climb into the tank through the manhole to
air and medical help. If solvent contacts eyes, inspect for cleanliness. All sediment and debris must be
removed using a lint-free cloth (item 24, Appendix E).
immediately wash your eyes with water and
get medical aid. (c) Remove all bands and anti-theft bolts
and nuts from the hose troughs and fire extinguishers.
b. Servicing. If exterior surfaces are coated with (d) Remove all tape from exhaust and
rust-preventive compound, remove with dry cleaning intake ports of the engine.
solvent (item 11, Appendix E). Read Processing and
Reprocessing Record for Shipment, Storage and Issue of (e) Place a suitable container under engine
Vehicles and Spare Engines tag (DD Form 1397) and fuel tank and remove drain plug. When engine fuel tank is
follow all directions carefully (para c). empty, replace the drain plug and fll tank with the proper
grade of fuel.
c. Specific Procedures.
(f) Check level of oil (fig. 3-1 through 3-6)
in the crankcase. If low, add proper grade oil to bring it up
(1) Open all water drain valves (figs. 2-24 and to the Full mark on the dipstick.
2-25) to remove preservative.
(g) Remove filters from the filter/separator
(2) Depreservation following DD Form 1397: (para 4-83) and replace gasket and access cover. Put about
200 gallons of the type of fuel to be hauled into the
semitrailer tank. Start the engine and pump fuel through
(a) Place containers under all drain valves. the piping. Discharge about 60 gallons of fuel into
Open all drain valves to remove the preservative liquid. suitable containers through each hose reel (M969,
Open manhole cover to let the tank air out. A M969A1, M970, and M970A1). Discharge remaining fuel
centrifugal or similar type of air blower can be used to through the 4-inch hose(s) into suitable containers. Stop
speed up the process. About one-half hour without a engine. Open all drain valves and drain residual fuel into
blower or ten minutes with a blower will be adequate. containers. Dispose of fuel in accordance with local SOP.

4-1
TM 9-2330-356-14

(h) Remove cover and gasket from the (a) While in motion, apply service brakes to
filter/separator and install filters (para 4-83). Replace ensure that brakes are working properly.
gasket and cover.
(b) Inspect marker lights, stop and turn
signal lights, blackout lights, and the control panel lights.
(i) Remove and clean automatic drain Replace if faulty.
valve.
(5) All deficiencies which appear to involve
(3) Lubricate all points illustrated in lubrication unsatisfactory design shall be reported on DA Form 2407
chart (fig. 3-1 through 3-6), regardless of interval. (DA Pam 738-750).

d. Correction of Deficiencies. Deficiencies disclosed

(4) Couple an authorized prime mover during preliminary inspection and servicing or during the
(para 1-10) to semitrailer. Perform a break-in by driving break-in period shall be corrected by using organization
25-30 miles at speeds up to 30 miles per hour. Check the or supporting maintenance activity. Deficiencies shall be
following: reported in accordance with DA Pam 738-750.

Section II. REPAIR PARTS, SPECIAL TOOLS, AND EQUIPMENT

4-2. Special Tools and Equipment 4-4. Fabricated Tools and Equipment
Special tools and equipment required for unit Table 4-1 contains fabrication instructions for all tools
maintenance of the semitrailers are listed in TM which must be fabricated by unit maintenance personnel
9-2330-356-24P. General mechanics tool sets and common for maintenance of this unit. Tables 4-2 through 4-7 list
tool sets required for maintenance are authorized by the bulk material and dimensions for fabrication of specific
Table of Allowance (TA) and the Table of Organization electrical leads, harnesses and cables, tubes, conduits, and
and Equipment WOE). chains.
4-3. Repair Parts
Repair parts authorized for use by unit maintenance are
listed and illustrated in TM 9-2330-356-24P.
Table 4-1. Fabricated Tools and Equipment.

Nomenclature Reference No. or NSN Material Required

Pressure gage NSN 6685-00387-9854 1 EA

Gladhand MS35746-1 2 EA
Valve 11668037 1 EA
Tee CPCXI, 120280 1 EA
Nipple MS51846-42 3 EA
Bushing MS51847-4 2 EA
Fabrication Instructions:
Assemble parts to create gladhand connector as shown

4-2
 TM 9-2330-356-14

Table 4-1. Fabricated Tools and Equipment (Cont).

Nomenclature Reference No. or NSN Material Required

Grease plate No. 10 gage hot rolled steel

Fabrication Instructions:
Fabricate to dimensions shown below.

4-3
TM 9-2330-356-14

Table 4-2. Fabricated Electrical Leads, Harnesses, and Cables.

Table 4-3. Fabricated Tube Lines.

4-4
 TM 9-2330-356-14

Table 4-4. Fabricated Chains.

Table 4-5. Fabricated Conduit.

Table 4-6. Fabricated Webbing.

Table 4-7. Fabricated Steel Cable.

Section Ill. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)

4-5. General these checks and services will increase the useful life of
the equipment, but every possible problem cannot be
Preventive maintenance is detecting/correcting problems
covered in the PMCS. You need to be alert for anything
before they happen, or fixing little problems before they
that might cause a problem. If anything does look wrong,
become big problems. Table 4-8 contains a list of
and you cant fix it, write it on DA Form 2404 and report it
preventive maintenance checks and services to be
to your supervisor. Be sure to record any corrective action.
performed by unit maintenance personnel. Attention to

4-5
TM 9-2330-356-14

a. Perform the checks and services at the intervals e. Watch for and correct anything that might cause a
shown in table 4-8. problem with the equipment. Some things you should
watch for are:
(1) Do your QUARTERLY (Q) PREVENTIVE
MAINTENANCE once each three months. (1) Bolts, nuts, and screws that are loose,
missing, bent, or broken.
(2) Do your SEMIANNUAL (S) PREVENTIVE
MAINTENANCE twice a year, or each six months. (2) Welds that are poor or broken.

(3) Do your ANNUAL (A) PREVENTIVE (3) Electrical wires and connectors that are bare,
MAINTENANCE once each year. broken, or loose.

(4) Do your BIENNIAL (B) PREVENTIVE (4) Hoses and fluid lines that leak, or show signs
MAINTENANCE once each two years. of damage or wear.

(5) Do your HOURS (H) PREVENTIVE f. You should know how fluid leaks affect the status
MAINTENANCE at the hour interval listed. of your equipment. Learn and be familiar with the
following types/classes of leakage. When in doubt, notify
b. Ensure that all safety precautions listed in the your supervisor!
Warning Summary are followed while performing PMCS.
Pay close attention to all WARNINGS and CAUTIONS. Leakage Definitions for PMCS:

CLASS I Seepage of fluid (as indicated by wetness

c. If the semitrailer doesnt work properly and you
cant see what is wrong, refer to Section IV for or discoloration) not great enough to
form drops.
troubleshooting instructions.
CLASS II Leakage of fluid great enough to form
WARNING drops but not great enough to cause
drops to drip from the item being check-
ed/inspected.
Dry cleaning solvent P-D-680 is toxic and
flammable. Always wear protective goggles CLASS III Leakage of fluid great enough to form
and gloves, and use only in a well-ventilated drops that fall from the item being
area. Avoid contact with skin, eyes, and checked/inspected.
clothes, and DO NOT breathe vapors. DO
NOT use near open frame or excessive heat,
The solvents flash point is 100F-138F CAUTION
(38C-59C). if you become dizzy while
using cleaning solvent, immediately get fresh Equipment operation is allowable with minor
air and medical help. if solvent contacts eyes, leakage (Class I or II). Of course, consider-
immediately wash your eyes with water and ation must be given to the fluid capacity in the
get medical aid. item/system being checked/inspected.
When in doubt, notify your supervisor.
d. Make cleanup a part of your preventive
maintenance. Dirt, grease, oil, and debris may cover up a g. When operating with Class I or II leaks, continue
serious problem. Use dry cleaning solvent (item 11, to check fluid levels as required in your PMCS.
Appendix E) to clean metal surfaces. Wipe off excess
grease and spilled oil. Use soap and water when you clean h. Class III leaks should be corrected before
rubber or plastic material. releasing equipment for operation.

4-6
 TM 9-2330-356-14

Table 4-8. Unit Preventive Maintenance Checks and Services.

4-7
TM 9-2330-356-14

Table 4-8. Unit Preventive Maintenance Checks and Services (Cont).

4-8
 TM 9-2330-356-14

Table 4-8. Unit Preventive Maintenance Checks and Services (Cont).

Q-Quarterly S-Semiannually A-Annually B-Biennially H-Hours
INTERVAL ITEM TO BE INSPECTED
ITEM PROCEDURE: Check for and have repaired,
NO. Q S A B H filled or adjusted as needed.

11 Fire Extinguishers (Cont).

b. Check mounting bracket for secure attachment to semitrailer. Check that

lockup handle moves freely and is not damaged.
c. Check that plastic indicator on top of fire extinguisher is intact.

NOTE
Some fire extinguishers have a safety wire-lead or plastic seal
attached to pull pin.
d. Check that safety wire-lead or plastic seal is not broken or missing.
e. Check that tube is not kinked and nozzle is free of obstructions.
f. Check that the fire extinghisher tag is securely attached. Check for date of
last inspection/recharge.
g. Cover and install fire extinguisher on mounting bracket. Ensure that
lockup handle holds fire extinguisher securely to mounting bracket.

Section IV. UNIT TROUBLESHOOTING

4-6. General c. This manual cannot list all malfunctions that may
occur, nor all tests or inspections and corrective actions. If
a malfunction is not listed, or the corrective action does
a. This section contains troubleshooting informa-
not ease the problem, notify your supervisor.
tion for locating and correcting most of the operating
problems that may develop in the semitrailer. Each mal- NOTE
function for a particular unit or component is followed by
a list of tests or inspections that will help you to determine Before you use this table, be sure you have
the probable causes and corrections to be made. Perform performed all applicable operational preven-
tive maintenance checks.
the tests and inspections in the order listed in table 4-9.
d. The table lists the common malfunctions that
b. Ensure that all safety precautions listed in the you may find during the operation and maintenance of the
Warning Summary are followed while performing PMCS. semitrailer or its components. You should perform the
Pay close attention to all WARNINGS and CAUTIONS. tests/inspections and corrective action in the order listed.

4-9
TM 9-2330-356-14

Table 4-9. Unit Troubleshooting.

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

ELECTRICAL SYSTEM

1. ALL LAMPS DO NOT LIGHT.

Step 1. Check for burned out fuse in towing vehicle.

Replace fuse if burned out.
Step 2. Check for loose receptacle ground leads.
a. Remove front access cover (fig. 4-17).
b. Check for loose ground leads. Tighten if loose.
c. Replace access cover.

2. ONE OR MORE LAMPS (BUT NOT ALL) WILL NOT LIGHT

Step 1. Check for burned out lamp.

Replace burned out lamp.
Step 2. Check for corroded or dirty lamp sockets.
Clean lamp sockets.
Step 3. Check for a broken circuit.
Refer to chassis wiring schematic (fig. 4-15) and check circuit with a multimeter (para 4-9).

3. DIM OR FLICKERING LIGHTS.

Check for loose receptacle ground leads,

See Step 2 under Malfunction 1, ALL LMPS DO NOT LIGHT.

BRAKE SYSTEM

4. BRAKES WILL NOT RELEASE.

Step 1. Check for broken brake shoe tension spring. Remove wheel and tire and brake drum to expose
wheel brake (para 4-49).
If brake shoe tension spring is broken, replace the spring (para 4-33 or 4-34).
Step 2. Test for leaking fail-safe chamber (para 4-39 or 4-40).
If fall-safe chamber is leaking, replace fail-safe chamber (para 4-39 or 440).
Step 3. Charge air system from towing vehicle or outside source.
Check for leaks in secondary reservoir and connections if brakes still do not release.

4-10
 TM 9-2330-356-14

Table 4-9. Unit Troubleshooting (Con't).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

BRAKE SYSTEM (Cont)

5. NO BRAKES OR WEAK BRAKES.

Step 1. Test for leaking air chamber diaphragm (para 4-37 or 4-38).
If air chamber is leaking, replace air chamber (para 4-37 or 4-38).
Step 2. Inspect for grease on brake linings. Remove wheel and tire and hub and drum to expose wheel
brake (para 4-49). If grease is evident, inspect wheel seal for damage.
Replace brake shoes (para 4-33 or 4-34). If wheel seal is damaged, replace (para 4-49).
Step 3. Inspect for worn brake linings.
If brake linings are worn within .030-inch of rivet heads, replace brake shoes (para 4-33 or
4-34).
Step 4. Test relay emergency valve (para 4-44).
If there is leakage or hesitation in brake application or release, replace relay emergency
valve (para 4-44).

6. SLOW BRAKE APPLICATION OR SLOW RELEASE.

Step 1. Test for leaking air chamber diaphragm (para 4-37 or 4-38).

if air chamber is leaking, replace air chamber (para 4-37 or 4-38).

Step 2. Check for broken brake shoe tension spring. Remove wheel and tire and brake drum to expose
wheel brake (para 4-49).
If brake shoe tension spring is broken, replace the spring (para 4-33 or 4-34).
Step 3. Test relay emergency valve (para 4-44).
If there is leakage or hesitation in brake application or release, replace relay emergency
valve (para 4-44).

7. GRABBING BRAKES.

Step 1. Check for improperly adjusted brakes (para 4-33 or 4-34). Check automatic adjusters.
Adjust brakes (para 4-33 or 4-34).
Step 2. Inspect for grease on brake linings. Remove wheel and tire and hub and drum (para 4-49) to
expose wheel brake. If grease is evident, inspect wheel Seal for damage.
Replace brake shoes (para 4-33 or 4-34). If wheel seal is damaged, replace (para 4-49).
Step 3. Inspect for loose or worn wheel bearings.
If wheel bearings are loose, adjust to the proper preload (para 4-49). If they cannot be
adjusted properly, replace wheel bearings (para 4-49).

4-11
TM 9-2330-356-14

Take 4-9. Unit Troubleshooting (Cont).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

BRAKE SYSTEM (Cont)

7. GRABBING BRAKES (Cont).

Step 4. Inspect for worn or loose brake linings.

If brake linings are worn within .030-inch of rivet heads, replaca brake shoes (para 4-33 or
4-34). If linings are loose, replace brake shoes.
Step 5. Inspect for cracked, scored, or deformed brake drum.
Replace brake drum.

8. BRAKE DRAG (ONE OR MORE BRAKE DRUMS RUNNING HOT).

Step 1. Check if brakes are adjusted too tightly (para 4-33 or 4-34).
a. Adjust brakes if too tight (para 4-33 or 4-34).
b. Check automatic adjusters (para 4-33 or 4-34). If not working, refer to Malfunction 9,
AUTOMATIC ADJUSTERS NOT WORKING.
Step 2. Test for leaking fail-safe chamber (para 4-39 or 4-40).
If fail-safe chamber is leaking, replace fail-safe chamber (para 4-39 or 4-40).
Step 3. Check for broken brake shoe tension spring. Remove wheel and tire and brake drum (para 4-49) to
expose wheel brake.
If brake shoe tension spring is broken, replace the spring (para 4-33 or 4-34).
Step 4. inspect for out-of-round drum.
Replace if out-of-found.
9. AUTOMATIC ADJUSTERS NOT WORKING (M967, M969, and M970 except M970 SN TC-0843, TC-0844,
and TC-103 thru TC-178).

Step 1. Check if adjusting pawl is properly installed.

Install adjusting pawl properly (para 4-36).
step 2. Check if pawl spring is collapsed or missing.
Replace pawl spring (para 4-36).
Step 3. Check if adjusting bolt is frozen in adjusting sleeve.
Free bolt. Replace if necessary (para 4-36).
Step 4. Check if detent spring is damaged and allowing adjusting bolt to rotate with sleeve.
Replace detent spring (para 4-36).
Step 5. Check if adjusting plunger is in wrong position.
Adjusting plunger should beat leading edge of shoe. Install properly (para 4-36).

4-12 Change 3
 TM 9-2330-356-14

Table 4-9. Unit Troubleshooting (Cont).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

BRAKE SYSTEM (Cont)

9. AUTOMATIC ADJUSTERS NOT WORKING (M967, M969, and M970 except M970 SN TC-0843, TC-0644,
and TC-103 thru TC-178) (Cont).

Step 6. Check If double lip seals are installed properly.

Install lip seals property (para 4-36).

LANDING GEAR

10. DIFFICULTY IN TURNING CRANK.

Check if lower leg is bent. If bend is not visible, check centering of lower leg at various positions.

Replace entire leg assembly (para 4-54). Refer repair of leg assembly to direct support
maintenance.

MANHOLE COVER

11. EXCESSIVE LEAKAGE AROUND MANHOLE.

Step 1. Check that fill cover Is property closed.

Check for damage to fill cover hinge parts and latch. Replace any damaged parts
(para 4-60).

step 2. Inspect fill cover gasket for damage.

If damaged, replace gasket (para 4-60).

Step 3. Check tightness of manhole clamping ring.

If loose, tighten nut and bolt.

Step 4. Inspect manhole gasket for damage.

if damaged, replace the gasket (para 4-60).

12. FILL COVER LATCH INOPERABLE.

Check for a broken spring in fill cover latch.

If broken, replace spring (para 4-60).

Change 3 4-13
TM 9-2330-356-14

Table 4-9. Unit Troubleshooting (Con t).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

ENGINE

13. ENGINE STARTER MOTOR WILL NOT RUN.

Step 1. Check condition of battery.

NOTE
Do not slave start or Jump start batteries.

Charge battery if discharged (para 4-23).

Step 2. Check for a blown circuit breaker.

Replace blown circuit breaker.

Step 3. Test for a defective Engine or Starter switch. Use a multimeter or a 12V test light.

If either switch Is defective, replace that switch.

Step 4. Test for a defective starter solenoid (para 4-80).

If defective, replace solenoid.

14. ENGINE TURNS OVER BUT FAILS TO START

Step 1. Check engine temperature.

a. If engine temperature is below 240F, test high-temperature switch (para 4-22).

b. If temperature is above 240F, the high-temperature switch (para 4-22) contacts have
opened and de-energized the fuel stop solenoid, stopping the engine. Allow engine to
cool before attempting to start engine again.

Step 2. Check for defective manifold heater and lead (para 4-20).

If defective, replace the manifold heater or the lead.

Step 3. (Defective fuel system) Check fuel lines for leaks. Test for non-functioning electric fuel pump
(para 4-73).
a. Tighten all connections and replace or repair any damaged fuel lines.

b. Replace electric fuel pumps (para 4-73), if defective, or repair or replace fuel pump
wiring.

Step 4. Check air cleaner dirt indicator for showing of red band and examine for clogged filter intake.
a. Replace filter element if red band is showing (para 3-18).

b. Remove air cleaner intake cap and clean as necessary (para 3-18).

c. Replace air cleaner if damaged (para 4-74).

4-14
 TM 9-2330-356-14

Table 4-9. Unit Troubleshooting (Cont).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

ENGINE (Cont)

14. ENGINE TURNS OVER BUT FAILS TO START (Cont).

Step 5. Check for dirty fuel or clogged fuel filter.

a. If fuel is dirty, drain and refill tank with clean fuel.

b. Replace dirty fuel filters (para 4-73).

Step 6. Inspect for proper grade of fuel.

Check fuel specifications (para 2-10), drain fuel tank, and fill with proper grade of fuel.

15. ENGINE HARD TO START OR LOW ENGINE POWER.

Step 1. Check that engine oil is the proper grade for the ambient temperature. Check oil specification
charts (fig. 3-1 through 3-6).

Change to right grade of oil.

Step 2. Inspect for proper grade of fuel.

Check fuel specifications (para 2-10), drain fuel tank, and fill with proper grade of fuel.

Step 3. Inspect for fuel line leaks.

Tighten all connections, check for damage or defects to lines. Repair or replace the fuel lines
(para 4-73).

Step 4. Check air cleaner dirt indicator for showing of red band, and examine for clogged filter intake.

a. Replace filter element if red band is showing (para 3-18).

b. Remove air cleaner intake cap and clean as necessary (para 3-18).

c. Replace air cleaner if damaged (para 4-74).

Step 5. Check for dirty fuel or clogged fuel filters.

a. If fuel is dirty, drain and refill tank with clean fuel.

b. Replace dirty fuel filters (para 4-73).

16. LOW OIL PRESSURE (MINIMUM 20 PSI).

Step 1. Check oil level. If low, check for external leaks.

a. Fill with proper oil.

b. If leaks are noticed, notify direct support maintenance.

4-15
TM 9-2330-356-14

Table 4-9. Unit Troubleshooting (Cont).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

ENGINE (Cont)

16. LOW OIL PRESSURE (MINIMUM 20 PSI) (Cont).

Step 2. Inspect for defective oil gage (para 4-24).

Replace oil gage (para 4-24).

17. HIGH OIL PRESSURE (ABOVE 40 PSI WHEN ENGINE IS WARM).

Step 1. Check if engine is overfilled with oil.

Drain oil until oil in engine is proper level.

Step 2. Check for proper grade of oil. Oil maybe too heavy in viscosity.

Check oil specifications in Lubrication Charts (fig. 3-1 through 3-6). if wrong oil, drain the
engine and refill with the proper grade of oil.

18. ENGINE MISFIRES AT HEAVY LOAD.

Step 1. Check for defective manifold heater and lead (para 4-20).

If defective, replace manifold heater or lead.

Step 2. (Defective fuel system) Check fuel lines for leaks. Test for non-functioning electric fuel pumps
(para 4-73).

a. Tighten all connections and replace or repair any damaged fuel lines.

b. Replace fuel pump, if defective, or repair or replace fuel pump wiring (para 4-73).

Step 3. Check air cleaner dirt indicator for showing of red band and examine for clogged filter intake.

a. Replace filter element if red band is showing (para 3-18).

b. Remove air cleaner intake cap and clean as necessary (para 3-18).

c. Replace air cleaner if damaged (para 4-74).

Step 4. Check for dirty fuel or clogged fuel filter.

a. If fuel is dirty, drain and refill tank with clean fuel.

b. Replace dirty fuel filters (para 4-73).

Step 5. Inspect for proper grade of fuel.

Check fuel specifications (para 2-10), drain fuel tank, and fill with proper grade of fuel.

4-16
 TM 9-2330-356-14

Table 4-9. Unit Troubleshooting (Cont).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

ENGINE (Cont)

19. ENGINE SPEED IS NOT CONSTANT (HUNTING, LOSS OF CONTROL).

Step 1. Check for defective manifold heater and lead (para 4-20).

If defective, replace manifold heater or lead.

Step 2. (Defective fuel system) Check fuel lines for leaks. Test for non-functioning electric fuel pumps
(para 4-73).

a. Tighten all connections and replace or repair any damaged fuel lines.

b. Replace fuel pump, if defective, or repair or replace fuel transfer pump wiring
(para 4-73).

Step 3. Perform all steps under Malfunction 20, HIGH OR LOW ENG/NE SPEEDS.

20. HIGH OR LOW ENGINE SPEEDS.

Step 1. Check for loose or disconnected throttle linkage (para 4-75).

Connect throttle linkage.

Step 2. Check for binding in linkage.

Clean and lubricate linkage.

Step 3. Check throttle adjustment (para 4-75).

Adjust throttle linkage.

Step 4. Check governor sensitivity adjustment (para 4-76).

Adjust governor sensitivity.

21. BLACK SMOKE EXHAUST OR EXCESSIVE FUEL CONSUMPTION.

NOTE
The brown or black color in the exhaust is from minute solid particles of pure carbon. A darker
exhaust Indicates a higher carbon content. The exhaust color may vary from alight gray haze to a
brown or black, which indicates incomplete combustion. Since combustion is never absolutely
complete, the exhaust gases will never be invisible, but an increase may indicate trouble,
especially if there is no apparent change in engine conditions.

Step 1. Check for engine overload.

Reduce fuel dispensing rate or increase engine speed.

4-17
TM 9-2330-356-14

Table 4-9. Unit Troubleshooting (Cont).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

ENGINE (Cont)

21. BLACK SMOKE EXHAUST OR EXCESSIVE FUEL CONSUMPTION (Cont).

Step 2. Inspect for proper grade or dirty fuel,

Check fuel specification (para 2-10). Drain, fill with proper grade of fuel. If fuel is dirty, check
fuel filter (para 4-73).

Step 3. Inspect for dirty air cleaner.

a. Service air cleaner (para 3-18).

b. Replace air cleaner if damaged (para 4-74).

22. PREHEAT INDICATOR LAMP WILL NOT LIGHT.

Step 1. Check for burned out lamp (para 4-24).

Replace burned out lamp.

Step 2. Check battery conditions (para 4-23).

a. Clean cables and terminals.

NOTE
Do not slave start or jump start batteries.

b. Charge battery (para 4-23).

Step 3. Test preheat switch (para 4-24).

Replace if defective.

Step 4. Remove engine junction box cover. Turn preheater solenoid switch to ON position and listen for
clicking sound.

a. Replace preheater solenoid (para 4-18) if no sound is heard.

b. If sound is heard, replace manifold heaters (para 4-20).

CENTRIFUGAL PUMP

23. PUMP FAILS TO DELIVER FUEL.

Step 1. Check if pump either has lost prime or has not been primed.

Prime pump (para 4-90).

4-18
 TM 9-2330-356-14

Table 4-9. Unit Toubleshooting (Cont).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

CENTRIFUGAL PUMP (Cont)

23. PUMP FAILS TO DELIVER FUEL (Cont).

Step 2. Check for leakage of air into pump or at connections.

Tighten all connections. If gaskets need replacement, notify direct support maintenance.

BATTERY

24. DEFECTIVE BATTERY

Step 1. Check specific gravity of battery (para 4-23).

If specific gravity is low, recharge battery (para 4-23). If battery will not charge, replace
battery. Check new battery charge conditions at frequent intervals (para 4-23).
Step 2. Check for frayed or broken cables.
Replace cables (para 4-23).
Step 3. Check for loss of electrolyte in battery.
Service battery (para 4-23).
Step 4. Inspect for broken terminals.
Replace terminals.

25. BATTERY DISCHARGED.

Inspect for dirt and electrolyte on top of battery causing constant drain (para 4-23).
Clean battery top.

FILTER/SEPARATOR

26. FUEL DOES NOT FLOW DURING FUEL SERVICING OPERATION.

Check filter/separator gage reading, If gage registers 25 psi or more, the fuses are clogged.
Replace clogged fuses (para 4-83).

27. CONTINUOUS SEEPAGE FROM AUTOMATIC DRAIN VALVE.

Inspect for liquid other than water seeping out of automatic water drain valve (fig. 4-127).
Notify direct support maintenance.

4-19
TM 9-2320-356-14

Table 4-9. Unit Troubleshooting (Cont).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

PIPING CONTROL COMPONENTS

28. EMERGENCY VALVE WILL NOT OPEN OR CLOSE OR LEAKS OCCUR.

Step 1. Inspect for loose cable at valve operator A and at the emergency valve (fig. 4-90).
a. Tighten cable connecting U-bolt and nuts at emergency valve.
b. Tighten cable bolt and nut at nut on valve operator A. Adjust cable (para 4-51).
Step 2. Check for loose nut on stuffing box.
Tighten nut if loose.
Step 3. Check if nuts on flange are loose.
Tighten loose nuts. If nuts are not loose and leakage is around flange, notify direct support
maintenance.

29. EMERGENCY VALVE CONTROL OPERATES IMPROPERLY.

Step 1. Check for loose cable at valve operator A (fig. 4-90).

Tighten nut on connector bolt.
Step 2. Check tension on trip lever or release lever (fig. 4-90).
a. If spring is broken, replace.
b. Tighten adjusting bolt and nut on trip link.

30. GATE VALVES OPERATE IMPROPERLY.

Inspect for leaks around hand wheel stem.

Open valve to raise lock housing. Tighten stuffing box nut.

FUELING OPERATIONS

31. FUEL DOES NOT FLOW DURING ANY NON-FILTERED FUELING OPERATIONS.

Check if emergency valve can open, Open valve by operating emergency valve control A (fig. 4-90).
If valve does not open, adjust, repair, or replace emergency valve control and cables
(para 4-51).

32. FUEL DOES NOT FLOW DURING ANY FILTERED OPERATION (M969, M969A1, M970, and M970A1).

Step 1. Check if emergency valve can open. Open valve by operating emergency valve control A
(fig. 4-90).
If valve does not open, adjust, repair, or replace emergency valve control and cables
(para 4-51).

4-20
 TM 9-2330-356-14

Table 4-9. Unit Troubleshooting (Cont).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

FUELING OPERATIONS (Cont)

32. FUEL DOES NOT FLOW DURING ANY FILTERED OPERATION (M969, M969A1, M970, and M970A1)
(Cont).

Step 2. Check filter/separator gage registers 25 psi or more, the fuses are
clogged.

Replace clogged fuses (para 4-82).

Step 3. Check for plugged nozzle screen.
Clean screen (paras 3-14 through 3-17).

33. FUEL DOES NOT FLOW DURING OVERWING FUELING OPERATION (M970 and M970A1).

Step 1. Complete steps 1 and 2 under Malfunction 32, FUEL DOES NOT FLOW DURING ANY FILTERED
FUELING OPERATION.

Step 2. Check if deadman control is deactivated (para 2-11).

a. If deadman control cannot be deactivated, check deadman control hoses for kinks.
Straighten kinks. Check deadman hoses for breaks. Check connections for leaks.
Replace damaged hoses and tighten loose connections (para 4-92).
b. If deadman control checks out, inspect and test deadman release plunger circuit
(para 4-95). Replace any faulty component and tighten any loose connections.

34. FUEL DOES NOT FLOW DURING ANY UNDERWING FUELING OPERATION (M970 and M970A1).

Step 1. Complete steps 1 and 2 under Malfunction 32, FUEL DOES NOT FLOW DURING ANY FILTERED
FUELING OPERATION (M969, M969A1, M970, and M970A1).

Step 2. Check if deadman control is inoperable (para 4-89).

a. Check deadman control hoses for kinks. Straighten kinks.
b. Check deadman hoses for leaks or loose connections. Replace hoses and tighten loose
connections (para 4-89).
c. If handle control is faulty, replace the control.

4-21
TM 9-2330-356-14

Section V. PAINTING AND STENCILING

4-7. Painting and Stenciling WARNING

a. General instructions are included in TB 43-0209 DO NOT paint the semitrailers grounding
and TM 43-0139. studs. To ensure safe operation of fuel
handling equipment, proper bonding and
grounding connections must be made to
b. Spot painting and marking (stenciling) of tactical
clean, unpainted surfaces. Failure to follow
vehicles will be performed under the control of unit this warning may result in injury or death to
maintenance personnel. personnel.

c. Painting of a complete tactical vehicle can be d. To ensure proper bonding and grounding
authorized and performed only by direct support connections, DO NOT paint the semitrailers grounding
maintenance or by higher support elements. studs.

4-22
TM 9-2330-356-14
fig. 4-1
4-23
TM 9-2330-356-14
fig. 4-1
4-24
TM 9-2330-356-14
fig. 4-2
4-25
TM 9-2330-356-14
fig. 4-2
4-26
TM 9-2330-356-14
fig. 4-3
4-27
TM 9-2330-356-14
fig. 4-3
4-28
 TM 9-2330-356-14

Section VI. TESTING THE ELECTRICAL SYSTEM WITH A MULTIMETER

4-8. Electrical Diagrams tional Maintenance Automotive Shop Sets. The three
When testing the electrical system, refer to all wiring meters, shown in figure 4-4, are the Simpson 160, the
diagrams. Detailed illustrations and procedures arc TS-352 B/U, and the AN/URM-105. These meters all do
provided for complete testing of the electrical system on the same job, and any one of the three can be used to
this vehicle. troubleshoot the semitrailer. The ohms scale is used to
test for continuity, shorts, and resistance. The voltmeter
4-9. Multimeters scale is used to test voltage levels at any point in the
Any one of three multimeters may be found in the electrical system.
Common Number 1 and Common Number 2 Organiza-

Figure 4-4. Shop Set Multimeters.

4-29
TM 9-2330-356-14

4-10. Using the Ohms Scale again. if the needle will not zero after you
have replaced the batteries, turn the meter in
for repair.
WARNING

When troubleshooting an electrical malfunc- a. Zero the Meter. To obtain an accurate reading, you
tion or performing electrical maintenance, must first adjust the meter so that when there is zero
ALWAYS disconnect Intervehicular electrical resistance, the needle gives a reading of zero. Use the
cable from semitrailer, and negative battery appropriate procedure below for the type of meter in your
cables at batteries. Failure to follow this warn- shop set.
ing may create a spark and explosion, result-
ing in serious injury or death to personnel. (1) AN/URM-105. Use the procedure shown in
figure 4-5.
NOTE
if the needle will not zero properly, replace (2) TS-352 B/U. Use the procedure shown in
the batteries and try the zeroing procedure figure 4-6.

SET SELECTOR SWITCH TO Xl

OHMS POSITION. NOW ZERO THE METER.
TOUCH THE 2 PROBES
TOGETHER

NOTE: IF NEEDLE WILL NOT ZERO REPLACE THE BATTERIES.

IF THE NEEDLE STILL WILL NOT ZERO AFTER REPLAC-
ING THE BATTERIES, TURN THE METER IN FOR REPAIR,
TA099761
Figure 4-5. Zeroing the AN/URM-105.

4-30
 TM 9-2330-356-14

TA099762
Figure 4-6. Zeroing the TS-352 B/U.

(3) Simpson 160, Refer to figure 4-7. (2) Disconnect the battey ground cable at the
battery. Then disconnect the circuit you are going to test.
(a) Set the selector switch to RX1.
(3) Connect the meter probes to both terminals
(b) Put the black probe in the COM-jack.
of the circuit you are testing (fig. 4-8).
(c) Put the red probe in the + jack.
(4) Read the meter. Interpret the results as
(d) Now zero the meter by touching the follows:
probes together and turning the ADJ knob until the
needle is over the (1 on the top scale. (a) If the needle swings over the 0 on the top
scale, the circuit has continuity.
b. Continuity Tests. Continuity tests are made to
check for breaks in a circuit (such as a switch, light bulb, or
(b) If the needle doesnt move, the circuit is
electrical cable). Make a continuity check as follows:
open. The wire is broken and must be replaced.
(1) Zero the meter (para 4-10).
(c) If the needle jumps or flickers, there is a
loose connection somewhere in the circuit being tested.
CAUTION Make sure the meter leads are pressed firmly against the
test points, If the meter lead connections are firm, tighten
Failure to disconnect the battery ground all connections in the circuit. If the needle still jumps,
cable (or outside power source) can damage there may be an intermittent open in the wiring; the wire
the meter. should be replaced.

4-31
TM 9-2330-356-14

NOTE: IF NEEDLE WI LL NOTZERO REPLACE THE BATTERIES.

IF THE NEEDLE STILL WILL NOT ZERO AFTER REPLAC-
ING THE BATTERIES, TURN THE METER IN FOR REPAIR.
TA099763
Figure 4-7. Zeroing the Simpson 160.
c. Testing for Shorts. A short (or short circuit) occurs
when two circuits that should not be connected have
metal-to-metal contact with each other. A short also
occurs when a circuit that should not touch ground has
metal-to-metal contact with ground. To check for shorts,
do as follows:

(1) Zero the multimeter (para 4-10).

CAUTION

Failure to disconnect the battery ground

cable (or outside power source) can damage
the meter.

(2) Disconnect the battery ground cable at the

battery. Then disconnect the circuit being tested.

(3) Connect one probe to one circuit and the

other probe to either the other circuit or to ground
TA099764 (fig. 4-9). The figure shows how to test for a short between
Figure 4-8. Using the Meter to Test Continuity. two wires.

4-32
 TM 9-2330-356-14

(4) Read the meter. Interpret the results as CAUTION

follows:

(a) If the needle swings toward the 0 on the Failure to disconnect the battery ground
top scale, the circuits are shorted (or the circuit is cable (or outside power source) can damage
grounded, if testing to ground). the meter.

(b) If the needle doesnt move, the circuits (2) Disconnect the battey ground cable at the
are okay. battey. Then disconnect the circuit being tested.
(c) If the needle jumps or flickers, the
circuits are shorted (or grounded) intermittently. NOTE
Whenever you change switch settings, zero
the meter again.

(3) Select the correct ohms switch setting

(table 4-10). For normal circuits where 3 ohms is the
maximum allowable reading, use the Xl or RX1 scale
(fig. 4-10).

TA099765
Figure 4-9. Using the Meter to Test for Shorts
or Grounds.

d. Testing Resistance. Allowable resistance readings

depend on the circuit being tested, For most direct wiring
circuits (e.g., lighting), a maximum of 3 ohms within the
wiring is satisfactory. Where other ohms readings are
allowable (e.g., 10,000 ohms in the coil), they are specified
in the particular section dealing with that circuit or
component. Test resistance as follows:
TA099766
(1) Zero the meter (para 4-10). Figure 4-10, Interpreting Meter Readings.

Table 4-10. Ohms Range Switch Setting.

Switch How to read scale Meter reads Reading means

X1 or RX1 Read the number on the scale 4 400 ohms
X1O or RX 1O Multiply scale reading by 10 4 40 ohms
X1OO or RX1OO Multiply reading by 100 4 400 ohms
X1K or RX1K Multiply reading by 1000
X1OK or RX1OK Multiply reading by 10000

4-33
TM 9-2330-356-14

4-11. Using the DC Volts Scale NOTE

If measuring less than 10V DC, use the 10V
Use the DC volts scale to measure all voltages; the AC jack. If measuring less than 2.5V DC, use the
volts scale is never used on these semitrailers. 2.5V jack.
a. Setting up the Meter. Before reading the meter, set (c) To measure 12V DC, plug the red lead
it up using the procedure below that matches the into the 50V jack on the left side of the meter.
multimeter in your shop set.

CAUTION

If you are not sure of the voltage you will be

measuring, ALWAYS select the 50V range
(100V range on the AN/URM-105).

(1) AN/URM-105. Set the meter switch to the

DC volts range set forth in the testing paragraph for the
component or circuit you are testing. (For most circuits on
the semitrailer, the right range is the one marked 100 DC
Volts) (fig. 4-11).

TA099768
Figure 4-12. Using TS-352 B/U to Measure
DC Volts.
(3) Simpson 160 (Fig. 4-13).

NOTE
If measuring less than 10V DC, set switch to
the V/DC 10 position. If measuring less than
2.5V DC, set switch to the V/DC 2.5 position.

(a) Set the polarity reversing switch to the

+ DC position.

TA099767
Figure 4-11. Using AN/URM-105 to Measure
DC Volts.
(2) TS-352 B/U (Fig. 4-12).

(a) Set the FUNCTION switch to DIRECT.

TA099769
(b) Put the black lead in the DC+/-AC/ Figure 4-13. Using the Simpson 160 to Measure
OHMS jack. DC Volts.

4-34
 TM 9-2330-356-14

b. Measuring DC Voltage. (2) Connect the red probe to the positive (+)
side of the circuit, and the black probe to the negative (-)
(1) First set up the meter (para 4-11). side (fig. 4-14).

TA099770
Figure 4-14. Measuring Battery Voltage.

4-35
TM 9-2330-356-14

Section VII. MAINTENANCE OF CHASSIS ELECTRICAL SYSTEM

4-12. Chassis Wiring

composite light.

WARNING (8) Left Rear Composite Light Lead Assembly. This

lead (fig. 4-16) is located in the left rear composite light
When troubleshooting an electrical malfunc- box. It connects to the wiring harness in two places and to
tion or performing electrical maintenance, the left composite light.
ALWAYS disconnect Intervehicular electrical
cable from semitrailer, and negative battery (9) Connector Lead Assembly. This lead
cables at batteries. Failure to follow this warn- (fig. 4-16) is located in the left rear composite light box. It
ing may create a spark and explosion, result- is made up of six different leads, of which two connect to
ing In serious injury or death to personnel. left rear marker lights, two to the wiring harness, one to
triple marker light lead, and one to left composite light.

a. General. The chassis wiring of the semitrailer b. Repair. Most of the wiring can be repaired without
consists of one wiring harness, seven electrical lead removing the harness and leads from the semitrailer.
assemblies, and one receptacle assembly. Refer to figures
4-15 and 4-16 for schematic diagram and wire connections (1) Clean end of harness leads with a damp cloth.
of chassis electrical system. Wiring is as follows:
(2) Check ends of wire harness for frayed
(1) Receptacle Assembly. The receptacle insulation and broken wires. Tape or replace frayed wires.
(fig. 4-16) is mounted on the left front side of the
semitrailer. It connects the electrical system of the towing (3) Inspect wires for bent, broken, or missing
vehicle with that of the semitrailer. The main wiring terminals. Replace missing or damaged terminals.
harness of the semitrailer connects to the receptacle.
c. Replacement of Chassis Wiring.
(2) Wiring Harness. This harness (fig. 4-16) runs
the entire length of the semitrailer through conduit, the (1) Composite Light and Connector Lead
left rear composite light box, to the right rear composite Assemblies Replacement.
light box. It connects to various leads which in turn
connect to the lights on the semitrailer. (a) Remove six screws that secure
composite light box cover (fig. 4-23) to the light box.
(3) Rear Triple Marker Light Lead Assembly. This Remove cover and gasket.
lead (fig. 4-16) is threaded from the triple marker box
(b) Start removing the old lead terminals
through conduit to the left composite light box. There it
one connection at a time. As each lead terminal is
connects to one of six leads of the connector lead
removed, connect the correct lead terminal of the
assembly.
replacement lead before removing the next one. Continue
this process until the old lead is removed and the new one
(4) Right Front Marker Light Lead. This lead is completely connected into the circuit.
(fig. 4-16) is threaded from the right front marker box
through conduit to the left side of the semitrailer. There it (c) Replace composite light cover and
connects into the receptacle wiring, the wiring harness gasket. Secure with six screws.
and lead from the left front marker light.
(d) Test operation of lights.
(5) Left Front Marker Light Lead Assembly. This
lead (fig. 4-16) connects to the left front marker light and (2) Triple Marker Light Lead Assembly Replace-
to the right front marker light lead. ment.

(6) Right Side Marker Light Lead Assembly. This (a) Remove six screws that secure
lead (fig. 4-16) is threaded from the right center marker composite light box cover (fig. 4-23) to the light box.
light box through conduit to the left center marker light Remove cover and gasket.
box. There it connects to the wiring harness and to the left
center marker light. (b) In the composite light box, locate the
lead that comes from the triple marker box (fig. 4-20).
(7) Right Rear Composite Light Lead Assembly. Disconnect this wire from the connector lead assembly
This lead (fig. 4-16) is located in the right rear composite (fig. 4-16). Cut the terminal from the lead.

4-36
TM 9-2330-356-14
fig. 4-15
4-37
TM 9-2330-356-14
fig. 4-16
4 - 3 8
 TM 9-2330-356-14

(c) Remove the three marker lights (j) Connect right center marker light lead
para 4-15) from the triple marker box, but do not remove to the lead assembly. Replace gasket and cover. Secure
the washer and shell from the light leads. with four screws.

(d) Pull old wire lead through conduit and (k) In the left marker box, connect the two
out through one of the openings in the triple marker box. harness leads (No. 21-489) to the new lead assembly.
Connect the left marker light lead (No. 489) to the lead
(e) Starting at left composite light box, assembly. Replace gasket and cover. Secure with four
thread a lacing wire through conduit into triple light box. screws.
Attach lacing wire to lead, and pull lead through conduit
(l) Test operation of lights.
into composite light box.
(4) Front Marker Light Lead Assemblies Replace-
(f) Install new terminal onto lead. Connect ment.
triple marker light lead assembly to connector lead
assembly (fig. 4-16). (a) Remove both front marker light box
covers and gaskets (fig. 4-21) by removing eight screws
(g) Replace composite light box cover and from each box cover and disconnecting the marker light
gasket. Secure with six screws. electrical lead (No. 489).

(h) Connect the marker light leads to the (b) Remove six screws from the front
triple marker light lead assembly. electrical access cover (fig. 4-17). Remove cover and
gasket.
(i) Replace triple marker lights (para 4-15).

(j) Test operation of lights.

(3) Right Side Marker Light Lead Assembly Re-

placement.

(a) Remove four screws that secure right

marker light box cover (fig. 4-22) to the light box.

(b) Disconnect the marker light lead from

the right center marker light lead assembly, then remove
the cover and gasket.

(c) Cut the terminal from the marker light

lead assembly.

(d) Remove the four screws that secure left

side marker light box cover to the light box. Remove cover
and gasket.

(e) Disconnect the marker light lead and

remove gasket and cover. TA502342
Figure 4-17. Front Access Cover
(f) Disconnect the marker light lead
assembly from the two wire harness leads. (c) From inside electrical access hole,
disconnect the left marker light lead assembly from the
right marker light lead assembly. Disconnect right marker
(g) Pull the old marker light lead assembly
light lead assembly from receptacle wire lead (No. 21-489)
through the conduit and out the left marker light box.
and wire harness lead (No. 21-489).
(h) Thread a lacing wire through conduit (d) Cut the terminal from the right marker
from one light box to the other. Attach lead assembly to light lead assembly in the right marker box.
lacing wire and pull the lead into the right marker box.
(e) From inside the left marker light box,
(i) Install new terminal onto the lead pull the old right marker light lead assembly from the
assembly. conduit.

4-39
TM 9-2330-356-14

(f) Starting at the right marker light box, NOTE

thread a lacing wire through the conduit. Attach the lead
As harness Is being pulled Into conduit, coat
assembly to the lacing wire, and pull the lead into right
harness with a silicon lubricant or mild soap
marker box.
solution. Do not coat entire harness at one
(g) Install new terminal onto the lead time.
assembly.
(e) Starting at left rear composite light box,
(h) Place the three ends of the lead thread a lacing wire through conduit and out the front
assembly in the left marker box into the access hole. access hole. Attach lacing wire to new harness, then pull
harness through conduit and out the composite light box.
(i) Connect the right marker light lead to
the lead assembly. Replace the gasket and cover (f) Disconnect lacing wire and thread it
(fig. 4-21). Secure with eight screws. through right composite light box, conduit, and out left
composite light box. Attach lacing wire to wire harness and
(j) Through the front access hole, connect pull wiring harness out right composite light box.
the left marker light lead assembly (No. 489) to the right
marker light lead assembly. Connect the other two leads (g) In each light box, pull wiring harness
(No. 21-489) to the receptacle lead (No. 21-489) and the leads out of conduit and into light box. Install new
wire harness lead (No. 21-489). terminals onto each wiring harness lead.
(k) Replace the gasket and the front access
(h) Connect all light leads to wiring harness
cover by securing with six screws (fig. 4-17). leads (fig. 4-15).
(l) Connect the left marker light lead
(i) Replace all light box covers and gaskets.
(No. 489) to the lead assembly. Replace the receptacle box
cover and gasket by securing with eight screws.
(j) In the front access hole, connect harness
(m) Test operation of lights. leads to receptacle and marker light leads.

(5) Wiring Harness Replacement. (k) Replace front access hole cover and
gasket. Secure with six screws.
NOTE
(l) Test operation of semitrailer lights.
The terminals must be removed to pull
harness through the conduit. (6) Receptacle Assembly Replacement.

(a) One at a time, remove each marker light (a) Remove six screws from front access
box cover and gasket on the semitrailers left side, then cover (fig. 4-17). Remove cover and gasket.
composite light box cover and gaskets. Disconnect all
wiring harness leads and cut the terminals from the wiring (b) Inside access hole, disconnect all
harness leads. electrical leads from the receptacle electrical leads.
Remove screw that fastens the receptacle ground leads to
(b) Pull the portion of wiring harness that the semitrailer.
runs across rear of the semitrailer out through the left rear
composite light box. (c) Remove four screws and lockwashers
from the receptacle mounting plate, and remove the
(c) Remove the front access cover receptacle and-gasket (fig. 4-18).
(fig. 4-17) and disconnect all wire harness leads from the
receptacle and marker light leads. (d) To install receptacle, reverse steps (a)
through (c).
(d) Pull the wiring harness out through the
front access hole. (e) Test operation of semitrailer lights.

4-40
 TM 9-2330-356-14

4-14. Marker Lights

WARNING

When troubleshooting an electrical malfunc-

tion or performing electrical maintenance,
ALWAYS disconnect Intervehicular electrical
cable from semitrailer, and negative battery
cables at batteries. Failure to follow this warn-
ing may create a spark and explosion, result-
ing In serious injury or death to personnel.

a. Replacement of Lamps. The front, center, and rear

marker lights (figs. 4-20 through 4-23) are constructed the
same, except that the front and side marker lights have an
amber lens while the rear marker lights have a red lens.

(1) Remove two screws (fig. 4-24) that hold lens

housing to body. Remove lens housing.

(2) Press down on lamp and turn

counterclockwise to remove lamp.

(3) Install new lamp.

TA502343
Figure 4-18. Receptacle Installation. (4) Replace lens housing. Secure with two
screws.
4-13. Conduit for Chassis Wiring
b. Removal.

(1) Remove two screws (fig. 4-24) that secure

WARNING lens housing to body. Remove lens housing.

(2) Remove four screws that fasten marker light

When troubleshooting an electrical malfunc-
body to plate. Be careful not to lose the four spacer
tion or performing electrical maintenance, washers between gasket and body.
ALWAYS disconnect Intervehicular electrical
cable from semitrailer, and negative battery (3) Disconnect marker light lead and remove
cables at batteries. Failure to follow this warn- marker light.
ing may create a spark and explosion, result-
ing in serious Injury or death to personnel. (4) Remove washer and shell from marker light
lead.

Removal. Wiring conduit should only be removed c. Installation.

a.
when repairs are warranted. Remove wiring harness and (1) Replace washer and shell on marker light
electrical leads as needed (para 4-12). Use figure 4-19 as lead.
reference when removing conduit. Where conduit passes
under clips, bend these clips back far enough to remove (2) Connect marker light lead to chassis wiring.
conduit, but do not break clips off. Should enough of these
clips break off to hamper installation of conduit, contact (3) Attach marker light body to trailer with four
direct support maintenance to weld on new clips. screws. Be sure spacer washers are installed between
gasket and body.
b. Installation. Use figure 4-19 as reference to install (4) Install lamp if needed, and replace lens
new conduit. housing by securing with two screws.

4-41
TM 9-2330-356-14

TA099775
Figure 4-19. Chassis Wiring Conduit Installation.

4-42
 TM 9-2330-356-14

Figure 4-20. Triple Marker Box Figure 4-22. Side Marker Box.

Figure 4-21, Front Marker Box. Figure 4-23. Composite Light.

4-43
TM 9-2330-356-14

TA099780
Figure 4-24. Exploded View of Marker Light.

4-15. Composite Tall Stop Lights (5) Inspect door and lens assembly. If damaged,
replace. Secure door and lens assembly to body assembly
with six screws.
WARNING
b. Removal.
When troubleshooting an electrical malfunc-
tion or performing electrical maintenance, (1) Loosen six self-tapping screws (fig. 4-23) that
ALWAYS disconnect intervehicular electrical fasten cover plate to semitrailer. Remove cover plate and
cable from semitrailer, and negative battery gasket.
cables at batteries. Failure to follow this warn-
ing may create a spark and explosion, result- (2) Disconnect light wires from harness.
ing in serious injury or death to personnel.
(3) Remove the two capscrews and Iockwashers
a. Lamp or Lens Replacement. (fig. 4-25) that attach composite light to plate.

(1) Loosen six captive screws (fig. 4-25) which (4) Remove composite light and gasket.
fasten door and lens to body.
c. Installation.
(2) Remove door and lens find preformed pack-
ing. (1) Fasten composite light and gasket to cover
plate with two lockwashers and capscrews (fig. 4-25).
(3) Remove defective lamp and install a new
lamp. (2) Connect light wires to the harness.

(4) Inspect preformed packing and replace if (3) Install cover plate and secure with six
damaged. self-tapping screws.

4-44
 TM 9-2330-356-14

TA099781
Figure 4-25. Exploded View of Composite Light.

Section VIII. MAINTENANCE OF ENGINE ELECTRICAL WIRING

4-16. Engine Wiring ing may create a spark and explosion, result-
ing in serious injury or death to personnel.

a. General. The engine wiring consists of seventeen

WARNING
different leads. Each lead has its origin at either the
engine junction box or the buss bar (figs. 4-26 and 4-27).
When troubleshooting an electrical malfunc- Each of these leads is replaceable as an assembly.
tion or performing electrical maintenance, Replacement. Refer to figures 4-26 through 4-29 as
b.
ALWAYS disconnect intervehicular electrical a guide in removing any engine wiring. Repair or remove
cable from semitrailer, and negative battery and replace any wire that is cut, is frayed, or has broken
cables at batteries. Failure to follow this warn- terminals.

4-45
TM 9-2330-356-14

TA099782
Figure 4-26. Starter High Temperature Switch, Low Pressure Switch, Fuel Shut-off Solenoid,
and Manifold Heater Wiring.

4-46
 TM 9-2330-356-14

TA502344
Figure 4-27. Alternator Buss Bar Circuit Breaker Starter Fuel Pumps, and Tachometer Sensor Wiring.

4-47
TM 9-2330-356-14
Figure 4-28. Engine Wiring Schematic (M967, M969, and M970).
4-48
 TM 9-2330-356-14
Figure 4-29. Engine Wiring Schematic (M967A1, M969A1, and M970A1).
4-49
TM 9-2330-356-14

4-17. Circuit Breaker (5) Loosen three cable connectors (fig. 4-30) on
side of junction box.
WARNING
(6) Pull the two large leads through the
When troubleshooting an electrical malfunc- connectors until they are almost removed from the
tion or performing electrical maintenance, junction box.
ALWAYS disconnect intervehicular electrical
cable from semitrailer, and negative battery (7) Remove four screws (6, fig. 4-31) and
cables at batteries. Failure to follow this warn- washers (7) that secure mounting plate to control panel.
ing may create a spark and explosion, result-
ing in serious injury or death to personnel. (8) Tilt mounting plate (8) for access to circuit
breaker mounting screws (13).
a. Removal.
(9) Remove the two screws (13) and circuit
(1) Disconnect negative battery cable from breaker (12).
battery (fig. 4-37).
b. Installation.
(2) Loosen engine junction box clamp screws and
open cover.
(1) Install circuit breaker to plate with two screws
(3) Disconnect all leads from preheater solenoid (13, fig. 4-31).
and circuit breaker (fig. 4-30).
(2) Fasten mounting plate to control panel with
(4) Disconnect lead No. 54 (fig. 4-30) that goes four screws (6) and washers (7). Ground lead is to be
to fuel pumps from terminal strip. installed with upper left screw.

TA502346
Figure 4-30. Location of Circuit Breaker and Preheater Solenoid in Junction Box.

4-50
 TM 9-2330-356-14

TA502288
Figure 4-31. Disassembled Engine Junction Box.

4-51
TM 9-2330-356-14

(3) Connect leads to circuit breaker and b. Installation.

preheater solenoid.
(1) Install solenoid (14, fig. 4-31) to mounting
(4) Connect lead No. 54 (fig. 4-30) to terminal plate with two screws (18) and nuts (19).
strip.
(2) Fasten mounting plate to control panel with
four screws (6) and washers (7). Ground lead is to be
(5) Tighten cable connectors on side of junction installed with upper left screw.
box.
(3) Connect leads to preheater solenoid
(6) Close junction box cover and tighten clamps. (fig. 4-30).

(7) Connect negative battery cable to battery (4) Connect lead No. 54 to terminal strip.
(fig. 4-37).
(5) Tighten cable connectors on side of junction
4-18. Engine Preheater Solenoid box.

(6) Close junction box cover and tighten clamps.

WARNING (7) Connect negative battery cable to battery
(fig. 4-37).
When troubleshooting an electrical malfunc-
tion or performing electrical maintenance, 4-19. Engine Junction Box
ALWAYS disconnect intervehicular electrical
cable from semitrailer, and negative battery
cables at batteries. Failure to follow this warn- WARNING
ing may create a spark and explosion, result-
ing In serious injury or death to personnel. When troubleshooting an electrical malfunc-
tion or performing electrical maintenance,
ALWAYS disconnect Intervehlcular electrical
a. Removal. cable from semitrailer, and negative battery
cables at batteries. Failure to follow this warn-
(1) Disconnect negative battery cable from ing may create a spark and explosion, result-
battery (fig. 4-37). ing in serious Injury or death to personnel.

(2) Loosen engine junction box clamps and open a. Removal.

cover.
(1) Disconnect negative battery cable from
(3) Disconnect all leads from preheater solenoid battery (fig. 4-37).
and circuit breaker (fig. 4-30).
(2) Loosen junction box cover screws and lower
the cover.
(4) Disconnect lead No. 54 (fig. 4-30) that goes
to fuel pumps from terminal strip. (3) Tag all leads in junction box necessary for
removal of cables to ensure proper installation when
(5) Loosen cable connectors (fig. 4-30) on side of installing junction box<
junction box.
(4) Disconnect all leads in junction box and
(6) Pull the two large leads through the remove completely.
connectors until they are almost removed from the
junction box. (5) Remove four capscrews (2), lockwashers (3),
and nuts (4). Remove wiring harness (5).
(7) Remove four screws (6, fig. 4-31) and
(6) Remove five cable connectors (1) by removing
washers (7) that secure mounting plate to control panel.
locking washers, and pull cable assemblies.
(8) Tilt mounting plate (8) for access to solenoid (7) Remove four screws (6) and washers (7).
mounting screws. Remove mounting plate (8).

(9) Remove the two screws (15), nuts (16), and (8) Remove two capscrews (9) and nuts (10).
preheater solenoid (14). Remove junction box (11).

4-52
 TM 9-2330-356-14

(9) Remove circuit breaker (12), preheater (6) Install wiring harness (5), and secure with
solenoid (14), and terminal strip (17). four capscrews (2), lockwashers (3), and nuts (4).

(10) If damaged, remove screw (23) and clip (24) (7) Correctly connect all leads in the junction box
from junction box (11). in accordance with the tag designations. Remove tags.
(8) Close cover and secure with screws.
b. Installation (Fig. 4-31).
(9) Connect negative battery cable to battery
(1) If removed, install clip (24) and screw (23) to (fig. 4-37).
junction box (11).
4-20. Manifold Heaters
(2) Install circuit breaker (12) onto mounting
plate (8) with two screws (13), preheater solenoid (14) with WARNING
two screws (15) and nuts (16), and terminal strip (17) with
two screws (18) and two nuts (19). When troubleshooting an electrical malfunc-
tion or performing electrical maintenance,
(3) Install junction box (11) on bracket (22) with ALWAYS disconnect Intervehicular electrical
two capscrews (9) and nuts (10). cable from semitrailer, and negative battery
cables at batteries. Failure to follow this warn-
(4) Install mounting plate (8) in junction box (11) ing may create a spark and explosion, result-
and secure with four screws (6) and washers (7). ing in serious Injury or death to personnel.
(5) Insert cable assemblies with connectors (1) in a. Inspection (Fig. 4-32). Inspect manifold heaters
junction box holes and secure with cable connector for physical damage. Check that electrical leads to
locking washers. manifold heaters are clean and secure.

TA099787
Figure 4-32. Manifold Heaters

4-53
TM 9-2330-356-14

CAUTION

With preheater switch in the PREHEAT

position, 12V DC Is applied to manifold
heaters. Do not handle manifold heaters with
preheater switch in the PREHEAT position.

b. Test. Remove electrical leads to manifold heaters.

Use ohmmeter to test for continuity from terminal of
manifold heater to ground. Open circuit indicates faulty
manifold heater.

c. Removal.

(1) Disconnect negative battery cable from TA099788

battery (fig. 4-37). Figure 4-33. Glow Plugs.

(2) Open engine door panel (fig. 4-101). CAUTION

(3) Disconnect five electrical leads (1,2,3,4, and With preheater switch In the PREHEAT
5, fig. 4-32) from manifold heaters by removing nuts (6). position, 12V DC Is applied to the glow plug
body. Do not handle glow plug with preheater
(4) Remove connecting bar (7). switch In the PREHEAT position.

(5) Unscrew manifold heaters (8) from air intake b. Test. Remove electrical lead to glow plug. Use
manifold (9). ohmmeter to test for continuity from terminal of glow
plug and ground. Open circuit indicates bad glow plug.
d. Installation.
c. Removal. Disconnect negative battery cable at
(1) Screw manifold heaters (8, fig. 4-32) into air battery. Disconnect lead to glow plug. Unscrew glow plug
intake manifold. Tighten to 10-15 lb.-ft. and remove it from cylinder head. Remove gasket with a
hooked wire, then replace.
(2) Reinstall connecting bar (7), electrical leads
(1 through 5), and nuts (6) to manifold heaters. d. Installation. If gasket has been removed, place
new gasket over glow plug. Coat plug threads with
(3) Close engine cover panel. anti-seize compound (item 6, Appendix E), and screw glow
plug into cylinder head. Tighten glow plug to 10-15 Ib.-ft.
(4) Connect negative battery cable to battery Connect electrical lead to plug. Connect negative battery
(fig. 4-37). lead to battery.

4-21. Glow Plugs 4-22. High Temperature Switch, Oil Pressure

Switch, and Fuel Stop Solenoid

WARNING
WARNING
When troubleshooting an electrical malfunc- When troubleshooting an electrical malfunc-
tion or performing electrical maintenance, tion or performing electrical maintenance,
ALWAYS disconnect Intervehicular electrical ALWAYS disconnect Intervehicular electrical
cable from semitrailer, and negative battery cable from semitrailer, and negative battery
cables at batteries. Failure to follow this warn- cables at batteries. Failure to follow this warn-
ing may create a spark and explosion, result- ing may create a spark and explosion, result-
ing In serious injury or death to personnel. ing in serious injury or death to personnel.

a. Inspection. Inspect glow plugs (fig. 4-33) for a . General.

physical damage. Check that electrical lead to glow plug is
clean and tight. Check for leakage, indicated by oily (1) The high temperature switch (fig. 4-34) is
residue, where glow plug enters cylinder head. mounted on the engine just below the exhaust manifold on

4-54
 TM 9-2330-356-14

the side of the engine next to the tank. Its operating b. Test.
contacts are normally closed. If engine temperature rises
above 240 F, the switch contacts open, de-energizing the (1) High Temperature Switch (Fig. 4-34).
fuel stop solenoid and stopping the engine. The switch
closes again at about 195F. NOTE
(2) The low oil pressure switch (fig. 4-35) is Make sure engine temperature is below
located behind the engine shroud door. The switch is 195 F before attempting this test.
normally open. As the engine is cranked over, the switch
contacts close, completing the circuit to the fuel stop (a) Open the engine junction box and
solenoid (fig. 4-36). disconnect the two high temperature switch leads. These
leads should be marked with the number 35 on a band
(3) If oil pressure drops below approximately 13 marker.
psi, the switch opens the fuel stop solenoid circuit and the
engine will stop. (b) Using a continuity tester, test for
continuity of the high temperature switch. If tester
(4) If fuel flow from the tank stops due to no fuel, indicates there is continuity, the switch should be okay. If
a clog in the fuel line, or a short in the solenoid circuit, the the tester shows that there is no continuity, the switch is
fuel stop solenoid will de-energize. The engine will stop. defective and must be replaced.

TA099789
Figure 4-34. High Temperature Switch Location.

4-55
TM 9-2330-356-14

(2) Oil Pressure Switch (Fig. 4-35).

(a) With engine stopped, disconnect the two

leads from the oil pressure switch.

(b) Attach a continuity tester to the two

terminals on the switch. Have an assistant turn over the
engine several times. As oil pressure builds and exceeds
13 psi, the switch will close.

(c) Watch the continuity tester. At first

there should be no continuity reading. As the switch
closes, a continuity reading can be observed on the tester.
If no reading is obtained, the switch is defective and must
be replaced.

TA502348
Figure 4-36. Location of Fuel Stop Solenoid.

(3) Apply a thin layer of pipe compound (item 26,

Appendix E) to new low oil pressure switch. Tighten
securely. Reconnect the two leads to switch.

(4) Replace engine shroud cover.

4-23. Battery and Cables

WARNING

When troubleshooting an electrical malfunc-

tion or performing electrical maintenance,
ALWAYS disconnect Intervehicular electrical
TA502347 cable from semitrailer, and negative battery
Figure 4-35. Location of Oil Pressure Switch. cables at batteries. Failure to follow this warn-
ing may create a spark and explosion, result-
(3) Fuel Stop Solenoid (Fig 4-36). ing in serious injury or death to personnel.

(a) With an external 12V source connected NOTE

to solenoid switch terminal, check operation of plunger Refer to FM 9-207, Operation and
and current draw.
Maintenance of Ordnance Material in Cold
Weather (0 to -65 F) for Information on
(b) Current draw with the plunger up maintenance of batteries In extreme cold.
should be about 1 amp. If it is much more, the contacts did
not close and solenoid should be replaced.
a. Removal.
c. Replacement of Low Oil Pressure Switch. (1) Remove two wingnuts and washers (fig. 4-37)
securing battery cover to battery holddown assemblies.
(1) Remove engine shroud cover. Remove cover.

(2) Disconnect the two leads (fig. 4-35) from the (2) Disconnect negative, then positive battery
switch. Unscrew the low oil pressure switch. cables from terminals.

4-56
 TM 9-2330-356-14

(3) Loosen clamp bolts and remove terminals. (5) Loosen two nuts on each of four T-bolts
(fig. 4-37), and remove the two battery holddown
(4) If necessary to replace battery cables, assemblies. Carefully remove batteries.
disconnect negative battery cable at the engine frame by
removing the capscrew and nut securing battey cable to
the frame. To remove positive battery cable, remove the b. Cleaning. Tighten vent filler caps so no cleaning
two capscrews securing buss bar cover (fig. 4-125) to the solution will enter cells. Clean battery with baking soda
rear engine firewall, and remove cover. Disconnect and water solution and a stiff brush. If terminal clamps and
positive cable from buss bar and remove cable. battery posts are corroded, clean with a post and terminal
brush.
WARNING
c. Water Addition. The water in the electrolyte
Batteries contain sulfuric acid that causes solution will evaporate at high temperatures or from an
severe burns. If acid contacts eyes, skin, or excessive charging rate. Check electrolyte level and add
clothing, flush well with water. For contact distilled or clean water to just below the ring at bottom of
with eyes, get immediate medical attention. cell opening. DO NOT use acid!

TA099792
Figure 4-37. Battery Installation.

4-57
TM 9-2330-356-14

NOTE (2) Interpretation of Hydrometer Readings.

If water must be added to check specific
gravity, fast charge battery for 30 minutes or (a) The approximate state of charge can be
false readings will be obtained. determined by comparing readings to specific gravity
(table 4-11).
d. Checking Specific Gravity. A hydrometer or an
antifreeze/battey tester is used to check the specific (b) If all cells read between 1.200 and 1.260,
gravity (weight) of the battery electrolyte. The specific and the variation between the high and low cell is less than
gravity of the electrolyte indicates the approximate state 30 gravity points, the battery is good. It maybe necessary to
of charge of the battery. Hydrometers are calibrated to charge the battery before use.
give the true reading when the electrolyte temperature is
80F. Therefore, to obtain a correct specific gravity
reading, the temperature of the electrolyte must be (c) If all cells read between 1.200 and 1.260,
known. Some hydrometers contain a thermometer while and the variation between the high and low cell is 30
others do not. A separate thermometer is required to gravity points or more, fully charge battery and recheck
check electrolyte temperature if the hydrometer is not so specific gravity. If the variation is still 30 gravity points or
equipped. Refer to figure 4-38 for hydrometer more after charging, the battery is defective and must be
temperature corrections. An antifreeze/battery tester is replaced.
already temperature corrected.
(3) Testing with an antifreeze/battery tester is
(1) Test. done by following directions printed on the tester.
(a) Remove electrolyte from one cell at a
time with the hydrometer. Observe and record the
hydrometer reading. Be sure to hold the hydrometer Table 4-11. Specific Gravity Table.
vertical, check that the float is free, and take reading at
eye level.
State of Specific gravity Electrolyte
(b) Note the electrolyte temperature. Refer Charge at 80F Freezes approx.
to figure 4-38 and add or subtract four (.004) specific
gravity points for each 10 above or below 80F. The 1 00% 1.260 -75 F
corrected reading will be a true indication of cell 75% 1.230 -38F
condition. 50% 1.200 -17F
25% 1.170 1F
(c) Repeat steps (a) and (b) for remaining
Discharged 1.110 19F
cells.

TA099793
Figure 4-38. Hydrometer Temperature Correction.

4-58
 TM 9-2330-356-14

e. Charging Battery. on each occurrence to remain within the restrictions,

topping off at a 1 ampere rate. To fully charge, top off until
each cell has less than a 25 point variation and an average
WARNING specific gravity of 1.280 to 1.290, corrected (fig. 4-38),
measured in three readings spaced at hour intervals.
Batteries produce explosive gases. Keep
sparks, flame, and smoking material away. f. Installation of Battery.
Ventilate when charging or using in an
enclosed space. (1) Position batteries on engine frame with
positive posts closest to the engine. Place battery
The batteries contain sulfuric acid that holddown assemblies securely on battery.
causes severe burns. If acid contacts eyes,
skin, or clothing, flush well with water. For
contact with eyes, get immediate medical CAUTION
attention.
Batteries to be connected in parallel only.

CAUTION (2) Position and secure the clamp of the positive

battery cable (48-inch long) on the positive battery post. If
Always disconnect negative cables first. cable has been completely removed, secure the other end
of cable to the buss bar (fig. 4-27) with a bolt, washer, and
nut. Replace buss bar cover.
(1) Remove batteries from vehicle when
necessary to charge in accordance with TM 9-6140- (3) Position and secure the clamp of the negative
200-14. battery cable on the negative battery post. If cable has
been completely removed, secure the other end of cable to
(2) If dry batteries are used and vehicle is not engine frame (ground) with capscrew and nut.
placed in immediate service, slow charge with charger at
not more than 10 amperes. Charge until cells gas freely or (4) Position battery cover on battery holddowns
until electrolyte exceeds 120 F. Reduce charge rate by and secure with wingnuts and washers (fig. 4-37).

Section IX. MAINTENANCE OF ENGINE CONTROL PANEL

4-24. Switches, Gages, and Indicator Light filter/separator indicates no trouble and the instrument is
suspected of being defective, replace it with a new
instrument, known to be good, if available. Other tests can
WARNING be made as follows:

When troubleshooting an electrical mal- (1) Make a continuity test of wiring and switches
function or performing electrical mainte- using a multimeter (para 4-9).
nance, ALWAYS disconnect intervehicular
(2) Visually check instruments for broken glass,
electrical cable from semitrailer, and nega-
tive battery cables at batteries. Failure to damaged terminals, corrosion, and damage to cases and
follow this warning may create a spark and capillary tubes. Check wiring for broken or damaged
insulation and for broken wires. Check couplings and lines
explosion, resulting in serious injury or
to pump, filter/separator, and fuel and oil gages for
death to personnel.
looseness and damage.
Check for fuel leaks at gage tube
connections before performing electrical (3) Check conduit at back of panel for kinks or
testing at control panel. Stop any leaks and breaks. Check conduit fittings for tightness. Make sure
wipe up spills. decals are in place, clean, and readable. Check that all
switches are tight and no fasteners are missing or loose.

a. Testing Instruments, Switches, and Indicator Light. b. Replacement of Switches, Instruments, and Indicator
When an instrument shows an abnormal indication, the Light. Refer to figure 2-9 for location of switches and
trouble should be checked immediately and either instruments on the control panel. Refer to figures 4-39,
corrected or referred to proper authority to make the 4-40, and 4-41, and engine control panel electrical
necessary correction. If operation of the engine, pump, or schematic diagram (figs. 4-42 and 4-43) as a guide for

4-59
TM 9-2330-356-14

replacement. All switches and instruments must be (b) Remove the screw and washer
replaced from the rear of the panel. Disconnect the (fig. 4-39) that secures the switch lever to the switch.
negative ground lead from the battery. Remove six round
head screws (fig. 4-39) holding control panel to frame. (c) Remove the nut and lockwasher from
Swing control panel door down and hold open at 90 with outside the panel, and remove switch.
20-inches of safety wire threaded through one hole in door
and corresponding hole in panel. Mark all leads before
disconnecting. After replacing any component, close NOTE
panel door and replace six screws.
Aline locating tab on switch with locating hole
(1) Engine Switches (Preheater Starter and En- in cover.
gine).
(a) Disconnect the electrical leads (d) Install new switch in reverse order of
(fig. 4-41) from switch. steps (a) through (c).

TA223026
Figure 4-39, Switches and Electrical Gages in Control Panel.

4-60
 TM 9-2330-356-14

(2) Voltmeter and/or Pump Pressure Gage. (e) Install new meter or gage in reverse
order of steps (a) through (c).
NOTE (f) Cleanup all fuel spills.
Put suitable container under tube connec- (3) Tachometer and/or Hourrneter.
tions to catch fuel.
(a) Tag and disconnect electrical leads
(fig. 4-41) from rear of tachometer and/or disconnect
(a) Remove electrical lead (fig. 4-41) from connector in hourmeter line.
rear of voltmeter, and/or tube connector (fig. 4-40) from
rear of pump pressure gage. (b) Remove three screws and nuts from
hourmeter and pull meter out from front of control panel.
(b) Remove two nuts and brackets that
retain meter or gage to control panel. (c) Remove two nuts and bracket that
retains tachometer to control panel and pull meter out
from front of panel.
(c) Remove meter or gage from panel.
(d) Install new meter in reverse order of
(d) Remove snubber from pump pressure steps (a) and (b), being careful to reconnect leads exactly
gage. as they were connected to the meter that was removed.

TA099795
Figure 4-40. Pressure Gages in Control Panel.

4-61
TM 9-2330-356-14

TA099796
Figure 4-41. Engine Control Panel Wiring
(4) Filter/Separator Gage. (f) Clean up all fuel spills.

(5) FueI Pressure and/or Oil Pressure Gages.

NOTE
Put suitable container under tube connec- NOTE
tions to catch fuel.
Put suitable container under tube connec-
tions to catch fuel.
(a) Disconnect lines from 90 tube elbows
(fig. 4-40) (a) Disconnect line from tube fitting at rear
of gage.
(b) Remove lens and cover from front of
gage. (b) Remove coupling securing gage to
bracket on control panel.
(c) Remove two screws, washers, and nuts
that secure gage to control panel. (c) Remove gage and four washers through
front of control panel.
(d) Remove gage. Remove both elbows
from gage. (d) Install new gage in reverse order of (a)
through (c). Be sure to shim gage with existing washers.
(e) Install gage in reverse order of steps (a)
through (d). (e) Clean up all fuel spills.

4-62
TM 9-2330-356-14
fig. 4-42
4-63
TM 9-2330-356-14
fig. 4-43
4-64
 TM 9-2330-356-14

c. Replacement of Preheat indicator Light. Refer to (4) Replace indicator light socket into light body.
figures 4-39 and 4-41, and engine control panel schematic
figures 4-42 and 4-43 as guides for replacement of (5) Close panel door. Be sure that tubing to gages
indicator light. is not folded or crimped. Secure door with six screws.

(1) Removal. e. Replacement of Control Panel Plate. Remove all

switches, gages and light following instructions in b and c
(a) Disconnect negative battery lead from above. Remove four capscrews (fig. 4-39) which fasten
battery (para 4-23). plate to control panel. Remove control panel plate. Install
new plate and reinstall switches, gages, and light.
(b) Remove six screws (fig. 4-39) securing
control panel door and pull door open. Hold door ata90 f. Repair of Wiring. Repair any cracked, cut, or
angle with control panel with a 20-inch length of safety broken insulation with electrical tape (item 29, Appendix
wire threaded through one hole in door and E). Replace wiring when damage cannot be repaired.
corresponding hole in control panel. Tighten loose connections.

(c) Separate indicator light socket 4-25. Control Panel Wiring Harness and Conduit
(fig. 4-39) from light body by pulling on socket.
WARNING
(d) Remove nut and washer securing light
body to control panel door. Remove light body.
When troubleshooting an electrical malfunc-
(e) Remove crimp splices (fig. 4-41) on the tion or performing electrical maintenance,
indicator light ground leads. Disconnect the other lead ALWAYS disconnect intervehicular electrical
from control panel harness. cable from semitrailer, and negative battery
cables at batteries. Failure to follow this warn-
ing may create a spark and explosion, result-
(f) Remove indicator light socket. ing In serious injury or death to personnel.
(2) Installation.
a. Repair of Wiring. Repair any cracked, cut, or
(a) Insert light body (fig. 4-39) through hole broken insulation with electrical tape (item 29, Appendix
in door and secure with washer and nut. E). Replace wiring harness when damage cannot be
repaired.
(b) Insert socket into light body.
b. Replacement of Control Panel Wiring Harness.
(c) Connect the light ground lead (fig. 4-41) (1) Removal.
to the existing wire using a crimp splice. Install remaining
wire by crimping splice to control panel harness.
(a) Open control panel by removing six
round head screws (fig. 4-39) and swinging panel down.
(d) Remove safety wire from control panel
door and close door. Be sure that tubing to gages is not
(b) Disconnect all electrical leads and
folded or crimped. Secure door with six screws.
jumper assemblies from control panel wiring harness
(fig. 4-41).
(e) Install battery negative ground lead
(para 4-23). (c) With a wire cutter, remove all terminals
from the ends of the harness wires.
d. Preheat Indicator Light Lamp Replacement.
(d) Disconnect the wiring harness from the
(1) Remove six screws (fig. 4-39) securing engine junction box (fig. 4-44).
control panel door and pull door open.
(e) Secure a strong cord, about ten feet
(2) Separate indicator light socket from light longer than the harness, to the end of the wiring harness.
body.
(f) Pull harness out of conduit and allow
(3) Remove lamp from the indicator socket and cord to be pulled into the conduit. When harness is out,
install a new lamp. cord should be visible at both ends of conduit.

4-65
TM 9-2330-356-14

Figure 4-44. Control Panel Conduit Installation.

(2) Installation.
CAUTION

(a) Tape together all loose wires on control Be sure leads and jumpers are properly con-
panel end of new harness. nected.

(f) Connect harness wires to control panel

(b) Coat entire harness with silicon or a mild
leads and jumper assemblies.
soap solution.
(g) Close control panel and install six round
(c) Attach new harness to cord that is in the head screws. Be sure tubing to gages is not folded or
conduit. crimped.
(h) Connect wiring harness to engine
(d) Pull wiring harness through conduit junction box (fig. 4-44).
using the cord until end of harness is in control panel box c. Replacement of Control Panel to Engine Junction
and leads are long enough to reach panel wiring leads and Box Conduit.
jumper assemblies.
(1) Removal.
(e) Remove cord from end of harness and (a) Remove control panel wiring harness
install new terminals to wires. (step b).

4-66
 TM 9-2330-356-14

(b) Loosen both conduit connectors cables at batteries. Failure to follow this warn-
(fig. 4-44). ing may create a spark and explosion, result-
ing In serious injury or death to personnel.
(c) Remove two capscrews and nuts that
secure conduit mounting plate to engine mounting frame.
CAUTION
(d) Remove mounting plate and conduit.
Be careful not to crack lens by prying too hard
(2) Installation. with screwdriver.
(a) Install conduit connectors (fig. 4-44) if (1) Using a screwdriver, loosen lens from body.
they were removed.
(2) Press down on lamp, and turn to remove
(b) Place end of conduit in conduit lamp.
connector attached to control panel.
(3) Replace lamp.
(c) Insert other end of conduit into
connector in mounting plate and attach plate to frame (4) Press lens into light body.
with two capscrews and nuts.
b. Removal.
(d) Tighten conduit connectors to secure
conduit in place. (1) Open control panel (para 4-24).

(e) Install wiring harness (step b). (2) Disconnect terminal (fig. 4-45) from control
panel wiring harness.
4-26. Control Panel Light (Fig. 4-45)
(3) Remove terminal from electrical lead.
a. Replacement of Lamp.
(4) Remove conduit connector (fig. 4-45) from
each end of tubing between control panel and light
WARNING assembly.
When troubleshooting an electrical malfunc- (5) Remove two screws and nuts which fasten
tion or performing electrical maintenance, light assembly to hose trough.
ALWAYS disconnect intervehicular electrical
cable from semitrailer, and negative battery (6) Remove light and pull wire from conduit.

Figure 4-45. Control Panel Light Installation.

4-67
TM 9-2330-356-14

c. Cleaning and Inspection. (2) Attach light to hose trough with two screws
and nuts.
(1) Wipe dirt and other matter from light.
(2) Inspect light for broken or cracked lens and (3) Attach conduit connector (fig. 4-45) to light
corroded socket. assembly and control panel.
(3) Inspect body and switch for damage.
(4) Replace damaged parts or replace light. (4) Replace terminal on end of wire and connect
to control panel wiring harness.
d. Installation.
(1) Thread wire through conduit into control (5) Connect battery ground negative cable
panel box. (para 4-23) and check operation of light.

Section X. MAINTENANCE OF HOSE REEL ELECTRICAL SYSTEM

4-27. Hose Reel Wiring (6) Cable assemblies

b. Repair. The repair of most of the wiring can be

WARNING performed without removing the cables from the conduit.
When troubleshooting an electrical malfunc- (1) Clean ends of cables with a damp cloth.
tion or performing electrical maintenance,
ALWAYS disconnect intervehicular electrical
(2) Check ends of cables for frayed insulation or
cable from semitrailer, and negative battery
broken wires. Tape or replace frayed wires.
cables at batteries, Failure to follow this warn-
ing may create a spark and explosion, result-
ing in serious Injury or death to personnel. (3) Inspect wires for bent, broken, or missing
terminals. Replace missing or damaged terminals.
a. General. The hose reel electrical system consists c. Replacement of Wiring. Use figures 4-46 and 4-47
of items listed below. Use figures 4-46 and 4-47 as as guides in replacing cables. Remove the cover on any
references.
electrical component to gain access to lead terminals. Pull
old lead from conduit and install new lead with a lacing
(1) Buss fuse
wire, if necessary.
(2) Solenoid junction box
d. Replacement of Conduit. Use figures 4-48 and 4-49
(3) Solenoids (2) as guides in replacing conduit. Remove cables from
conduit to be replaced. Loosen conduit connectors on
(4) Junction box on hose reel motor (2) each end of conduit and remove conduit. The conduit
between engine compartment and junction box can be
(5) Hose reel rewind switches replaced by adapting instructions in paragraph 4-25.

4-68
 TM 9-2330-356-14

Figure 4-46. Hose ReeI Wiring Diagram (M969 and M969A1).

4-69
TM 9-2330-356-14

Figure 4-47. Hose Reel Wiring Diagram (M970 and M970A1).

4-70
 TM 9-2330-356-14

Figure 4-48. Hose Reel Cabinet Conduit (M969 and M969A1).

4-71
TM 9-2330-356-14

Figure 4-49. Hose Reel Cabinet Conduit (M970 and M970A1).

4-72
 TM 9-2330-356-14

Section Xl. MAINTENANCE OF BOGIE ASSEMBLY

4-28. General, M967, M969, and M970 except M970
SN TC-0843, TC-0844, and TC-103 thru TC-178. (6) Look for leakage around seals in spring seats.

a. Preliminary. Position semitrailer on hard level c . Repair. Tighten loose bolts. If damage or wear is
surface with front resting on landing gear. Jack and block evident, notify direct support maintenance.
rear of frame. Remove wheels (para 4-49). 4-29. General, M967A1, M969A1, and M970A1 includ-
ing M970 SN TC-0843, TC-0844, and TC-103
b. Inspection. Clean axle and suspension system with thru TC-178.
water and fiber brush to allow for careful inspection. a Preliminary. Position semitrailer on hard level
surface with front resting on landing gear. Jack and block
(1) Inspect general condition of tandem tube, rear of frame. Remove wheels (para 4-49).
torque rods, and spring leaves. Look for cracks or damage.
b. Inspection. Clean axle and suspension system with
(2) Cheek torque rods (fig. 4-50) for looseness water and fiber brush to allow for careful inspection.
(table 4-12). Look for deterioration of ball assemblies.
(1) Inspect general condition of trunnion tube,
(3) Check tightness of U-bolts (fig. 4-50) and axles and spring leaves. Look for cracks or damage.
clips on leaf springs (table 4-12),
(2) Check tightness of U-bolts (fig. 4-51), and
clips on leaf springs (table 4-13).
Table 4-12. Tabulated Torque ValuesBogie Assembly
M967, M969, and M970 except M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178).

(4) Look for cracked welds, damage to backing

plates, worn brake hoses, or cracked brake drum.

(5) Cheek tightness of bolts which fasten bogie

assembly to trailer frame.

Figure 4-51. Bogie Assembly (M967A1, M969A1, and

M970A1 including M970 SN TC-0843, TC-0844, and
TC-103 thru TC-178).

(3) Check tightness of U-bolts and screws

(fig. 4-51) on leaf spring cap and seat (table 4-13).

(4) Look for cracked brake drum.

Table 4-13. Tabulated Torque ValuesBogie Assembly,
M967A1, M969A1, and M970A1 including M970 SN
TC-0843, TC-0844, and TC-103 thru TC-178).

Figure 4-50. Bogie Assembly (M967, M969, and M970

except M970 SN TC-0843, TC-0844, and TC-103 thru
TC-178).

Change 3 4-73
TM 9-2330-356-14

4-30. Spring Seat Bearings, M967, M969, M970 except

(5) Look for damaged brake camshaft. M970 SN TC-0843, TC-0844, and TC-103 thru TC-178.
a. Lubrication Internal. See figures 3-1 through 3-6,
(6) Look for worn brake hoses or damaged broke Lubrication Chart.
chamber.
b. Procedure. Remove plug A on bottom of spring
seat (fig. 3-7) and install a -inch NPT grease fitting.
(7) Check tightness of bobs which fasten bogie Apply enough grease to ensure lubrication of the
assembly to trailer frame. bearings. Remove grease fitting and install plug.
c. Replacement of Bearings. If excessive wear is
c. Repair. Tighten loose bolts. If damage or wear is evident in the spring seat bearings, notify direct support
evident, notify direct support maintenance. maintenance.
Section XII. MAINTENANCE OF BRAKE SYSTEM
4-31. General, M967, M969, and M970 except M970
SN TC-0843, TC-0844, and TC-103 thru TC-178. chamber is threaded into the wedge bore of the plunger
housing.
a. Description. The semitrailer brakes are air-oper-
ated, wedge-type brakes. Two air chambers and two spring (2) The socket in the end of the diaphragm push
chambers (fail-safe unit) are assembled on each axle. The rod connects the brake chamber to the wedge rod.
brake chamber forces a wedge between two rollers in the
plunger housing (fig. 4-52). Wedge action causes the (3) The wedge retracting spring acts as the return
plungers in the actuator assembly to push the brake shoes spring for both the wedge and the diaphragm.
against the brake drum.
(4) Rollers on the wedge head engage slots in the
(1) The brakes are double-actuated. One of the inner ends of the plungers. The outer end of the plungers
actuating assemblies is shown in figure 4-52. The brake are in contact with the brake shoes.

Figure 4-52. Brake Actuator Assembly (M967, M969, and M970 except M970 SN TC-0843, TC-0844,
and TC-103 thru TC-178).

4-74 Change 3
 TM 9-2330-356-14

(5) Each actuator has one solid plunger and one (2) When there is enough reserve air in the front
adjustable plunger. The adjustable plunger is used to reservoir, the spring brakes can be released by opening a
adjust brake shoe-to-drum clearance. valve on the roadside of the semitrailer (para 2-4).

b. Actuation. When the brake is actuated, the push (3) A fill valve is installed on the roadside of the
rod of the brake chamber forces the wedge head between semitrailer to permit filling of the front reservoir
the rollers. The rollers and plungers move outward and (para 2-4a).
push the brake shoes against the drum causing friction to
slow the vehicle. e. Service Brake. When the towing vehicle is
attached, the foot brake operates the brakes on both the
(1) As the brake shoes contact the drum, the semitrailer and the towing vehicle.
drum drags the shoes and the extended plungers around
with it. This action causes the anchor plunger (at trailing
(1) Applying the brake pedal delivers air through
end of each shoe) to reseat on its abutment. Brake torque
the service air line to the emergency relay valve.
is transmitted through the anchor plunger to the brake
support.
(2) In response to the service signal, the
(2) When the brake is released, the wedge spring emergency relay valve releases air from the rear reservoir
returns the wedge and diaphragm to the released position. to the brake chambers. Air pressure causes the wedge in
At the same time, the shoe return springs push the raised each brake actuating assembly to move forward and push
plungers back into their plunger housings. the brake shoes against the drum.

c. Automatic Adjusters. The adjustable plunger of (3) Releasing the brake pedal stops the service
each brake actuator has an automatic adjustment feature. signal to the emergency relay valve. The emergency relay
Helical teeth on the outside of the plunger sleeve engage valve closes the supply from the reservoir and releases air
with saw-tooth-type teeth on a spring-engaged adjusting from the brake chambers.
pawl.
f. Emergency Relay Valve (Fig. 4-54). This valve
(1) As the brake is actuated, the plunger sleeve increases the speed at which the brakes apply and release.
moves outward with the plunger. The teeth on the plunger The relay valve is attached to the rear reservoir above the
sleeve lift the adjusting pawl against the spring. forward axle.

(2) When the brake is released, all the parts (1) The emergency relay valve releases air from
return to their starting positions. the rear (primary) reservoir to all brake chambers in
response to the service signal from the towing vehicle.
(3) As the brake lining wears. the plunger stroke
and the resulting pawl lift gradually increases. Eventually, (2) The emergency relay valve will also cause the
the pawl will climb over and fall into the next tooth space. fail-safe brakes to apply automatically if the semitrailer
This time, when the brake is released, the upright face of breaks away from the towing vehicle.
the pawl teeth causes the adjusting sleeve to rotate and
advance the adjusting bolt. g. Fail-Safe Units (Fig. 4-55). The fail-safe units are
spring chambers which are assembled piggyback on the
(4) The automatic adjuster operates only when brake air chambers. One each is installed on the air
vehicle is moving forward.
chambers at the four comers of the tandem axle assembly.
The fail-safe unit provides parking and emergency
d. Brake Air System (Fig. 4-53). Compressed air is braking.
transmitted from the towing vehicle through the service
and emergency air lines. When the engine of the towing
(1) Air pressure of approximately 65 psi is needed
vehicle is running, air pressure of 90-120 psi is kept in the
to release the fail-safe units.
system through the emergency air line. Compressed air is
routed into the rear reservoir through the emergency
relay valve. From the rear reservoir, the air enters the (2) Loss of air pressure will release the heavy
front reservoir. spring and push the piston against the diaphragm plate of
the air chamber. This force is applied through the wedge
(1) The front reservoir is for the fail-safe brakes. assembly and plungers to the brake shoes.
A pressure protection valve between the two reservoirs
maintains approximately 75 psi of air in the front reservoir (3) The fail-safe units can be manually released if
for release of the fail-safe brakes. air pressure is not available (para 2-4).

4-75
TM 9-2330-356-14
4-76 Change 3
 TM 9-2330-356-14

and two brake chambers are assembled to the front and rear
axle. The brake chamber movement through the slack adjuster
causes the camshaft to rotate and force the brake shoes against
the brake drumm (fig. 4-57).

(1) Attached to the slack adjusters are two

camshafts-one right-hand and one left-hand.

(2) The S-shaped part of the camshaft is

positioned between the rollers on the brake shoes.

b. Actuation. When the brake is actuated, air is

applied to the brake chambers and the diaphragm rod
moves the stack adjusters rotating the brake camshaft
against the two rollers on the brake shoes. This action
forces the brake shoes against the brake drum musing
friction to slow or stop the vehicle. When the brake is
released, spring action returns the brake shoes to release
position.

c. Brake Air System (Fig. 4-58). Compressed air is

transmitted from the towing vehicle through the service
Figure 4-54. Emergency Relay Valve. and emergency air lines. When the engine of the towing
h. Brake Interlock (M970 except M970 TC-0843, TC- vehicle is running, air pressure of 90-120 psi is kept in the
0844, and TC-103thruTC-178). The brake interlock system system through the emergency airline. Compressed air is
is activated when the door on the hose reel cabinet is open. routed into the rear reservoir through the emergency
When actuated, the interlock valve sends air form the rear relay valve. From the rear resevoir, the air enters the
reservoir into the service air line. This gives a service signal
to the emergency brake relay valve. The relay valve releases front reservoir.
air from the rear reservoir to the brake air chambers to apply
the brakes. Figures 4-53 and 4-56 show how the interlock (1) The front reservoir is for the fail-safe brakes.
system connects into the air brake system. A pressure protection valve between the two reservoirs
maintains approximately 75 psi of air in the front reservoir
4-32. General, M967A1, M969A1, and M970A1 for release of the fail-safe brakes.
Including M970 SN TC-0843, TC-0844, and TC-
103 thru C-178. (2) When there is enough reserve air in the front
reservoir, the spring brakes can be released by opening a
a. Description. The semitrailer brakes are air-operated
valve on the roadside of the semitrailer (para 2-4).
cam-type brakes. Two brake camshafts, two slack adjusters,

Figure 4-55. Fail-Safe Unit (M967, M969, and M970 except M970 SN TC-0843, TC-0844, and TC-103 thru TC-178).

Change 3 4-77
TM 9-2330-356-14

in each brake assembly to rotate and force the broke shoes

against the brake drum.

(3) Releasing the brake pedal stops the service

signal to the emergency relay valve. The emergency relay
valve closes the supply from the reservoir and releases air
from the brake chambers.

e. Emergency Relay Valve (Fig. 4-54). This valve

increases the speed at which the brakes apply and release.
The relay valve is attached to the rear reservoir above the
forward axle.

(1) The emergency relay valve releases air from

the rear (primary) reservoir to all brake chambers in
response to the service signal from the towing vehicle.

(2) The emergency relay valve will also cause the

fail-safe brakes to apply automatically if the semitrailer
breaks away from the towing vehicle.
Figure 4-56. Brake-Interlock (M970 and M970A1).
f Fail-Safe Units (Fig. 4-57). The fail-safe units are
(3) A fill valve is installed on the roadside of the spring chambers which are assembled piggyback on the
semitrailer to permit filling of the front reservoir brake air chambers. One each is installed on the air
(pars 2-4). chambers at the four comers of the tandem axle assembly.
d, Service Brake. When the towing vehicle is The fail-safe unit provides parking and emergency
attached the foot brake operates the brakes on both the braking.
semitrailer and the towing vehicle.
(1) Air pressure of approximately 65psi is needed
(1) Applying the brake pedal delivers air through to release the fail-safe units.
the service line to the emergency relay valve.
(2) Loss of air pressure will release the heavy
(2) In response to the service signal, the spring and push the piston against the diaphragm plate of
emergency relay valve releases air from the rear reservoir the air chamber. This force is applied through the
to the brake chambers. Air pressure causes the camshaft camshaft to the brake shoes.

Figure 4-57. Brake Actuator Assembly (M967A1, M969A1, and M970A1 including M970 SN TC-0843, TC-0844, and
TC-103 thru TC-178).

4-78 Change 3
 TM 9-2330-356-14

Figure 4-58. Brake Schematic (M967A1, M969A1, and M970A1 including M970 SN TC-0843, TC-0844,
and TC-103 thru TC-178).

Change 3 4-79
TM 9-2330-356-14

g. Brake Interlock (M970A1 including M970 SN TC- operating and brakes are properly adjusted. If clearance is
0843, TC-0844, and TC-103 thru TC-178). The brake interlock not between .040- and .060-inch, proceed to step (5).
system is activated when the door on the hose reel cabinet is
open. When actuated, the interlock valve sends air from the NOTE
rear reservoir into the service air line. This gives a service
signal to the emergency brake relay valve. The relay valve If adjusting bolt starwheel will not turn using
releases air from the rear reservoir to the brake air chambers to hand pressure, lightly tap the tool with a
apply the brakes. Figures 4-56 and 4-58 show how the hammer.
interlock system connects into the air brake system
(5) Insert brake adjusting spoon or long thin
h. Slack Adjusters. These convert linear motion of screwdriver into slot to meet the starwheel on the
the brake chamber to rotating motion of the camshaft. adjusting bolt. The adjusting bolt has right hand threads.
The slack adjuster consists of a housing, two gears, and Turn the starwheel counterclockwise to reduce brake
two gear covers. Brake adjustments are made through the lining-to-drum clearance.
slack adjuster.
(6) Back off the starwheel until you get a very
4-33. Service Brake Shoe Assemblies, M967, slight drag on the drum. Check brake lining clearance
M969, and M970 except M970 SN TC-0843, again (step (4)).
TC-0844, andTC-103 thru TC-178.
(7) Repeat steps (4) through (6) above for the
a. Test and Adjustment.
other shoe on brake.

(1) Jack up the semitrailer and lift all wheels off (8) Repeat steps (1) through (6) for all brake
the ground. Block the frame securely. assemblies.

(2) Release the fail-safe units (pars 2-4). b. Inspection and Replacement.

(1) Remove wheel and drum assembly

(3) Remove dust plugs from access slots at top
(pars 4-49).
and bottom of dust shield (fig. 4-59).
(2) Inspect brake linings for damage and wear.
New lining has approximately -inch of stock above
center rivets and approximately -inch of stock above end
rivets. Replace brake shoe if lining is damaged or is worn
within .030-inch of rivet heads. By recording lining wear
between scheduled annual brake maintenance periods,
expected wear can be calculated. Shoes with linings that
will not last until the next scheduled maintenance internal
should be replaced.

c. Removal.

(1) Remove hub, drum, and wheels (para 4-49).

(2) Turn the automatic adjusters with a brake

adjusting spoon or a long thin screwdriver clockwise until
the wedge brake plungers are fully contracted.

(3) Remove brake shoe return springs using

brake spring pliers.

(a) Unhook top hook of both return springs.

Figure 4-59. Adjusting Brake Lining-to-Drum Clearance.
(b) Remove springs.
(4) Insert a feeler gage into the access slots and
check brake drum to brake lining clearance. If clearance is (4) Remove brake shoes being careful not to
between .040- and .060-inch, automatic adjusters are disturb the position of the wedge brake parts.

4-80 Change 3
 TM 9-2330-358-14

(2) The anchor (solid) plunger must be

positioned at the trailing end of each shoe. The adjustable
plungers must be installed at the leading end of the shoes.
This lets the brake torque be absorbed by the anchor
plunger during forward wheel rotation.

(3) The long radius on the brake shoe should be

engaged with the adjustable plungers.

(4) Install new return springs whenever new or

relined brake shoes are being installed.

Figure 4-60. Remove Brake Shoes.

CAUTION

Use an authorized suitable solvent to clean

the brake components. DO NOT use gasoline
or hot water solutions. Gasoline coats the
metal parts and prevents grease from
adhering. Water causes etching and rust If
parts are not dried completely.

(5) Clean brake shoe return springs, backing

plate, and wedge assemblies.

(6) Do not remove the dust shield unless damage

is evident.

d. Repair.

(1) Service the plungers and brake adjusting

parts (para 4-36).

(2) Service the brake wedge assemblies

(para 4-35).

(3) Refer replacement of brake linings and

refacing of the drums to direct support maintenance.

e. Installation.

(1) It is imperative that each brake be assembled

as shown in figure 4-61 in relation to forward wheel
rotation. Note the position of the solid plunger and the
adjusting plunger. Also note the position of the long Figure 4-61. Plunger and Shoe Position (M967, M969, and
M970 except M970 SN TC-0843, TC-0844, and TC-103 thru
radius on the shoe web. TC-178).

Change 3 4-81
TM 9-2330-356-14

4-34. Service Brake Shoe Assemblies, M987A1, (2) Inspect brake linings for damage and wear.
M969A1, and M970A1 including M970 SN TC-0843, New lining has approximately) -inch of stock above
TC-0844, and TC-103 thru TC-178. center rivets and approximately -inch of stock above end
a Test and Adjustment. rivets. Replace brake shoe if lining is damaged or worn
within .030-inch of rivet heads. By recording lining wear
(1) Jack up semitrailer to lift all wheels off the between scheduled annual brake maintenance periods,
ground. Block the frame securely. expected wear can be calculated. Shoes with linings that
will not last until the next scheduled maintenance interval
(2) Release all spring forces from slack adjuster should be replaced.
and camshaft by applying air to the air brake chamber.
c. Removal.
(3) Check that the wheels rotate freely.
(1) Remove wheel and drum assembly
(4) Check yoke adjustment. Dimension from (para 4-49).
outside of nonpressure housing to center of clevis pin
must be 5.56-inches (fig. 4-62). (2) Loosen spider bolt (fig. 4-63).
(5) Apply a 9/16-inch wrench to worm shaft hex (3) Using broke spring pliers, remove broke shoe
head and push in against the slack adjuster to unlock the return spring.
worm shaft.
(4) Remove anchor pin retaining rings and
(6) Turn the hex head of the worm shaft anchor pin washers.
clockwise on slack adjuster until wheels cannot be turned.
(5) Drive upper and lower anchor pins from rear
(7) Back off the worm shaft until the wheel turns of brake shoe.
freely.
(6) Remove brake shoes.
(8) Repeat steps (1) through (7) for all four brake
assemblies. (7) Remove roller retainers and rollers from
brake shoes.
b. Inspection and Replacement.
(8) Remove spring pins from brake shoes.
(1) Remove wheel and drum assembly
(para 4-49). (9) Remove brake spider nut, washer, and bolt.

Figure 4-62. Adjustment of Yoke and Slack Adjuster (M967A1, M969A1, and M970A1 including M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178).

4-82 Change 3
 TM 9-2330-356-14

Figure 4-63. Removing and Installing Brake Shoes (M967A1, M969A1, and M970A1 including M4970 SN TC-0843,
TC-0844, and TC-103 thru TC-178).

Change 3 4-83
 TM 9-2330-356-14

4-35. Brake Wedge Assembly, M967, M969, and

WARNING
M970 except M970 SN TC-0843, TC-0844,
and TC-103 thru TC-178 (Fig. 4-64).
Dry cleaning solvent P-D-680 is toxic and
flammable. Always wear protective CAUTION
goggles and gloves, and use only in l
well-ventilated area. Avoid contact with Before removing any wedge actuator or at-
skin, eyes, and clothes, and DO NOT tempting to release spring brake or removing
breathe vapors. DO NOT use near open a clamp band, block wheels to prevent ve-
flame or excessive heat. The solvents hicle movement.
flash point la 1OOF-138F (38C-59C).
If you become dizzy while using cleaning a. Removal.
solvent, immediately get fresh air and
medical help. If solvent contacts eyes, (1) Remove brake air chamber (paras 4-37 and
Immediately wash your eyes with water 4-39),
and get medical aid.
(2) Remove wedge assembly by pulling it straight
Compressed air used for drying or out of plunger housing.
clearing purposes must not exceed 30 psi
(207 kPa). Wear protective clothing
(goggles and gloves) and use caution to
avoid injury to personnel.

(10) Clean anchor pins, rollers, roller retainers,

spring pins, and brake shoe return spring with dry cleaning
solvent (item 11, Appendix E). Dry the parts with low
pressure compressed air.

(11) Refer replacement of brake linings and

refacing of the drums to direct support maintenance.

d. Installation.

(1) Install spider bolt, washer, and nut. Do not

tighten (fig. 4-63).

(2) Install spring pins cm brake shoes.

Figure 4-64. Wedge Assembly Removal or Installation
(3) Install rollers and roller retainers on brake (M967, M969, and M970 except M970 SN TC-0843,
shoes. TC-0844, and TC-103 thru TC-178).
b. Inspection.
(4) Place brake shoes into position on brake
spider, and install upper and lower anchor pins and anchor
WARNING
pin washers.
Compressed air used for drying or cleaning
(5) Install anchor pin retaining rings on upper
purposes must not exceed 30 psi (207 kPa).
and lower anchor pins.
Wear protective clothing (goggles and
gloves) and use caution to avoid Injury to per-
(6) Using brake spring pliers, install brake shoe sonnel.
return spring.

(7) Tighten spider nut and bolt to 100-120 lb.-ft. (1) Clean wedge assembly thoroughly with mild
soap solution and dry with low pressure compressed air.
e. Assembly and Adjustment. (2) Inspect for damaged rubber boot, roller
retaining cage, rollers, or broken spring.
(1) Install wheel and drum assembly (para 4-49).
(3) Replace wedge assembly if damaged or
(2) Adjust slack adjuster (para 4-34). broken.

4-84 Change 3
 TM 9-2330-356-14

c. Repair. No repair is authorized. If damage is (2) Remove brake chamber(s) (paras 4-37 and
found, replace the wedge assembly. 4-39).

d. Installation. (3) Remove hollow capscrew, gasket, and pawl

spring from side of plunger housing (fig. 4-66). If the pawl
(1) Wipe plunger housing and wedge assembly does not come out with spring, use a small magnet to
with clean rag. remove the pawl.

(4) Pry the plunger seal loose. Remove the

(2) Install wedge assembly into the plunger
adjusting bolt, seal, and adjusting sleeve as an assembly.
housing. It maybe necessary to turn wedge assembly to
Remove the adjusting plunger.
engage the tabs (fig. 4-65) in the plunger housing. Check
for correct roller-plunger engagement by:
c. Removal of Anchor (Solid) Plunger.
(a) Observing that the ears on the roller (1) Remove the guide screw and gasket from side
retaining cage are in corresponding slots in wedge bore of of plunger housing (fig. 4-66).
plunger housing.
(2) Remove plunger and seal assembly.
(b) Pushing on wedge rod by hand while
checking for plunger and brake shoe lift. d. Inspection and Repair.

(c) When properly installed, the wedge rod

standout is 2-inches from plunger housing. Measure the WARNING
standout of the wedge rod from the end of the threaded
plunger housing bore. Dry cleaning solvent P-D-680 Is toxic and
flammable. Always wear protective
(3) Install brake chamber (paras 4-37 and 4-39). goggles and gloves, and use only In a
well-ventilated area. Avoid contact with
skin, eyes, and clothes, and DO NOT
breathe vapors. DO NOT use near open
flame or excessive heat. The solvents
flash point is 100F-138F (38C-59C).
If you become dizzy while using cleaning
solvent, Immediately get fresh air and
medical help. If solvent contacts eyes,
immediately wash your eyes with water
and get medical aid.
Compressed air used for drying or
cleaning purposes must not exceed 30 psi
(207 kPa). Wear protective clothing
(goggles and gloves) and use caution to
avoid injury to personnel.

(1) Thoroughly clean all metal parts with dry

cleaning solvent (item 11, Appendix E). Dry the parts with
Figure 4-65. Brake Wedge Alinement Tabs in Plunger low pressure compressed air.
Housing (M967, M969, and M970 except M970
SN TC-0843, TC-0844, andTC-103thruTC-178).
CAUTION
4-36. Brake Plungers and Brake Adjusting Parts,
M967, M969, and M970 except M970 SN TC-0843,
TC0844, and TC-103 thru T-178. DO NOT use dry cleaning solvent to clean any
a. Service. The plungers and adjusting parts should rubber parts. Damage to parts would result.
be serviced by following procedures c through e below
whenever the shoes have been removed. (2) Thoroughly clean plunger seals and gaskets
with mild soap solution and dry with low pressure
b. Removal of Adjusting Plunger Assembly. compressed air. Use wire brush on plunger parts and
adjusting bolt threads, if required, to remove caked on dirt
(1) Remove brake shoe assemblies (para 4-33). and corrosion.

Change 3 4-85
TM 9-2330-356-14

Figure 4-66. Brake Shoe Assembly and Adjusting Pans (M967, M969, and M970 except M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178).

4-86 Change 3
 TM 9-2330-356-14

(3) Inspect plunger seals and gaskets for damage, (d) Seat the plunger seal assembly in plung-
cuts, or deterioration. er housing with seal driver (fig. 4-67). A 1-inch wrench
socket and rawhide mallet can also be used. Ensure that
(4) Inspect plungers for rust, nicks, pits, or the seal is centered over the seal retainer to prevent dam-
grooves. age to seal assembly.

(5) Check for burrs on nose of anchor plunger.

Remove burrs with a fine file or crocus cloth. A bright,
shiny surface where wedge roller contacts the plunger
surface is normal.

(6) Check threads of adjusting bolt for damage.

(7) Replace all parts which are not in good

condition.

e. Installation of Anchor (Solid) Plunger.

CAUTION

DO NOT assemble seals Into plunger housing

first. This will result in complete lack of seal-
ing of Internal plunger housing components.
Figure 4-67. Seating Plunger Seal in Housing (M967,
NOTE M969, and M970 except M970 SN TC-0843, TC-0844.
and TC-103 thru TC-178).
Each plunger housing assembly has one ad- (3) Assemble gasket and guide screw (fig. 4-66)
justing plunger and one anchor (solid) plung- into guide hole in plunger housing. Ensure that the end of
er. The l nchor plunger Is marked on the guide screw enters keyway slot in plunger so anchor
slotted end, R for right-hand brakes and L plunger can slide freely in housing bore. Tighten guide
for left-hand brakes. DO NOT mix at assem- screw to 15-20lb.-ft.
bly.

f. Installation of Adjusting Plunger Assembly

(1) The anchor plunger and seal is serviced as an (Fig. 4-68).
assembly. Refer seal replacement to direct support
maintenance.
CAUTION
(2) Install plunger and seal assembly into plunger
housing in the following manner (fig. 4-66). DO NOT assemble seals Into plunger housing
first. This will result In complete lack of seal-
(a) Coat plunger bore with grease (item 17, ing of Internal plunger housing components.
Appendix E).

(b) Coat entire plunger with grease (item (1) Coat the inside and outside surfaces of both
17, Appendix E). AIso pack the cavity behind the seal the adjusting plunger and the adjusting sleeve with grease
assembly. (item 17, Appendix E). Also coat the plunger bore in the
housing with grease.
(c) Insert plunger and seal assembly into
housing with plunger keyway slot alined with guide hole in (2) Put the adjusting plunger into the plunger
plunger housing. The plunger must go all the way into the housing. Make sure the plunger goes all the way to bottom
plunger bore and seat on the bosses at bottom of the of bore and seats on the bosses. Aline keyway slot in
plunger housing. plunger with guide hole in plunger housing.

Change 3 4-87
TM 9-2330-356-14

(5) Pack a small amount of grease (item 17,

Appendix E) into the underside of single lip plunger seal
and seal lips. Assemble the seal over the adjusting sleeve
in the plunger housing. Push the seal over end of the
adjusting sleeve until the inner lip enters seal groove.
Check by lightly pulling up on seal. Seat the plunger seal
assembly (fig. 4-67) in the plunger housing with seal driver
or a 1-inch wrench socket and rawhide mallet.

(6) Apply grease (item 17, Appendix E) to

threads of adjusting bolt (fig. 4-66). Carefully push the
adjusting bolt through the seal and thread it into the
adjusting sleeve. Be careful not to damage the seal. Turn
the adjusting bolt in until head of bolt almost touches the
seal. Do not bottom the bolt on the seal.

g. Assembly and Adjustment.

(1) Install brake shoe assemblies (para 4-33).

(2) Install wheels hubs, and drum (para 4-49).

(3) Install brake air chambers (para 4-39).

Figure 4-68, Adjusting Plunger Assembly (M967, M969, (4) Check and adjust the brake lining-to-drum
and M970 except M970 SN TC-0843, TC-0844, clearance (para 4-33).
and TC-103 thru TC-178).

NOTE

The hollow adjusting pawl has teeth on one

end, flats on the side, and a chamfered edge
on the other end. Coat the hollow adjusting
pawl with grease (Item 17, Appendix E) and
Insert it into the guide hole, teeth first, and
with chamfer toward the brake shoe. This
alines the pawl with the actuator teeth and the
flats with the keyway slot. Ensure that pawl is
all the way into the slot In plunger housing.

(3) Install adjusting pawl. Push pawl in flush with

the inside of plunger. Hold the pawl in this position with a
smaIl screwdriver while you install the adjusting sleeve,
Seat the sleeve on bottom of adjusting plunger.
Figure 4-69. Cross-Section of Plunger Housing Showing
(4) Install spring, gasket, and hollow capscrew. Installation of Adjusting Plunger (M967, M969, and M970
Tighten capscrew finger tight. Proper meshing of the pawl except M970 SN TC-0843, TC-0844, and
and sleeve teeth can now be double checked. Apply grease TC-103 thru TC-178).
(item 17, Appendix E) to threads on adjusting bolt. Turn
4-37. Brake Air Chamber (Standard) Test and
the adjusting bolt into the adjusting sleeve until it Replacement, M967, M969, and M970 except
bottoms. A clicking sound and ratcheting feel will indicate M970 SN TC-0843, TC-0844, and TC-103
meshing of teeth. Now turn the adjusting bolt out three thru TC-178 (Fig. 4-70).
turns. If there is no clicking sound or ratcheting feel, the a. Test.
paw] is properly meshed, Tighten hollow capscrew to
15-20 lb.-ft., and unscrew adjusting bolt from adjusting (1) With towing vehicle connected and vehicle
sleeve. If pawl is not properly meshed, repeat steps (2) and brakes applied, coat the flanges and connect ions on the air
(3). chamber with soapy water.

4-88 Change 3
 TM 9-2330-356-14

(2) Check for leakage indicated by bubbles. No NOTE

leakage is permissible.
It may be necessary to remove the whole
brake assembly from the axle before un-
CAUTION screwing the brake chamber, due to possible
bracket interference.
DO NOT ovetighten clamp on air chamber.
Maximum torque should be 20-25 lb.-ft. Ov- (4) Remove brake chamber by unscrewing it from
er-tightening will distort the flange and cause plunger housing.
more leakage.
(5) At this time the wedge assembly can be
(3) If leakage is found at flange, tighten the removed for inspection or replacement (para 4-35).
clamp. If leakage is found at connections, tighten fittings.
c. Repair. Refer repair of brake chamber to direct
(4) After initial brake application forces out a support maintenance.
small amount of air, no air should be expelled from the air
chamber. If air continues to exhaust, repair or d. Installation.
replacement of the air chamber is necessary.
(1) Check position of the wedge in plunger
b. Removal. housing to make certain wedge assembly is properly
seated (para 4-35).
(1) Disconnect brake hoses from brake chambers
or relay valve. (2) Thread collet nut (fig. 4-70) onto housing
tube. Apply a non-hardening sealer (item 25, Appendix E)
(2) Remove U-bolt and two nuts securing to the first three threads of the housing tube.
chamber to bracket.
(3) With collet nut loose, turn the brake chamber
(3) Use adrift (fig. 4-70), or other blunt tool, and into the plunger housing until it bottoms.
hammer to loosen the collet nut.
(4) Aline connection ports with brake lines, if
necessary, by unscrewing brake chamber not more than
one full turn.

(5) Install U-bolt and two nuts to secure brake

chamber to bracket.

(6) Connect brake line.

(7) Make and hold a full pressure brake

application. Hand tighten the collet nut. With a drift and
hammer tighten collet nut 1-teeth or additional 3/18 of a
turn. Release brake pressure.

(8) Check for leaks at flange and connections

(step a).
4-38. Brake Air Chamber Test and Replacement,
M967A1, M969A1, and M970A1 including
M970 SN TC-0843, TC-0844, and TC-103 thru
TC-178 (Fig. 4-71).
a. Test.

(1) With towing vehicle connected and vehicle

brakes applied, coat the flanges and connections on the air
chamber with soapy water.

Figure 4-70. Removing Brake Chamber (M967, M969, and (2) Check for leakage indicated by bubbles. No
M970 except M970 SN TC-0843, TC-0844, and TC-103 thru leakage is permissible.
TC-178).

Change 3 4-89
TM 9-2330-356-14

d. Installation.
(1) Place brake chamber in position on bracket
(fig. 4-71).
(2) Install two washers and two nuts to secure
brake chamber to bracket.
(3) Check yoke adjustment (para 4-34).
(4) Install clevis pin and cotter pinto secure yoke
to slack adjuster.
(5) Connect two brake hoses to brake chamber.
(6) Close drain valves on air resevoirs (fig. 4-79).
(7) Pressurize air brake system and check for
leaks.
4-39. Brake ChamberFail-Safe Test and Re-
placement, M967, M969, and M970 except
M970 SN TC-0843, TC-0844, and TC-103 thru
Figure 4-71. Removing and Installing Brake Chamber TC-178.
(M967A1, M969A1, and M970A1 including M970 SN a. Test. Perform leakage test (para 4-37). The
TC-0843, TC-0844, and TC-103 thru TC-178). fail-safe unit will also be pressurized when the emergency
line is connected.
CAUTION
b. Replacement of Fail-Safe Unit.
DO NOT overtighten clamp on air chamber.
Maximum torque should be 20-25 lb.-ft. (1) Manually cage the spring in the fail-safe unit
Over-tightening will distort the flange and (para 2-4).
cause more leakage.
(2) Release air pressure by opening drain valves on
(3) If leakage is found at flange, tighten the both air reservoirs (fig. 4-79), then disconnect air lines and
clamp. If leakage is found at connection% tighten fittings. tag for identification at installation.

(4) After initial brake application forces out a (3) Tag brake hoses and disconnect them from brake
small amount of air, no air should be expelled from the air chambers and relay valve.
chamber. If air continues to exhaust, replacement of the air
chamber is necessary. (4) Remove nut and capscrew from clamp ring
which secures fail-safe unit to brake chamber (fig. 4-72).
b. Removal.
(5) Spread the clamp ring. Hold the diaphragm on
the non-pressure half and remove the fail-safe unit.
(1) Open drain valves on the air reservoirs and
allow air to bleed off (fig. 4-79). (6) Carefully install new fail-safe unit over diaphragm
on non-pressure housing.
(2) Disconnect two brake hoses from brake
chamber (fig. 4-71). CAUTION

(3) Remove cotter pin and clevis pin securing DO NOT overtighten clamp
yoke to slack adjuster. on air chamber, Maximum
torque should be 20-25 lb.-ft.
(4) Remove two nuts and two washers securing Over-thightening will distort
brake chamber to bracket. the flange and cause leakage.

(5) Remove brake chamber. (7) Install clamp ring, with capscrew, nuts, and
identification tag (fig. 4-72). Position the ports on the
c. Repair. No repair of brake chamber is authorized.

4-90 Change 3
 TM 9-2330-356-14

fail-safe unit to aline with brake lines. Tighten clamp (4) Remove rear clamping band (fig. 4-73) seeming air
screw to 20-25 lb.-ft. Do not overtighten. chamber unit to brake chamber and remove air chamber unit.

(8) Reconnect air hoses to brake chamber. (5) Use a drift and hammer to loosen collet nut
(fig. 4-70).
(9) Manually release spring in fail-safe unit.
(6) Remove broke chamber and air chamber unit by
unscrewing the assembly from the plunger housing.

(7) At this time, the wedge assembly can be removed

for inspection or replacement (para 4-35).

e. Repair. Refer repair of broke chamber to direct support

maintenance.

f. Installation of Brake Chamber and Air Chamber Unit.

(1) Clean and install wedge assembly (if removed) into

plunger housing (para 4-35). Check position of wedge in plunger
housing to make certain wedge assembly is properly seated

(2) Make sure the spring in the air chamber unit is caged.

(3) Thread collet nut onto housing tube. Apply anon-

hardening seater (item 25, Appendix E) to the first three threads
of housing tube.

(4) With collet nut loose, turn the brake chamber into
plunger housing until it bottoms.

(5) Replace the air chamber unit on the brake chamber.

Clamp in place with clamp ring, using a nut and capscrew to
secure clamp.

(6) Aline connection ports with brake lines, if necessary,

by unscrewing brake chamber not more than one full turn.

Figure 4-72. Removing Brake Chamber (M967, M969, and

M970 except M970 SN TC-0843, TC-0844, and
TC-103thruTC-178).
c. Repair of Fail-Safe Unit.

WARNING

Do not attempt to repair brake chamber

fail-safe unit. It is dangerous because of high
spring compression. No repair Is authorized
for fail-safe unit.

d. Removal of Brake Chamber.

(1) Cage the spring in the air chamber unit (para 2-4).

(2) Release air pressure by opening drain valves on

both air reservoirs (fig. 4-79).

(3) Tag and disconnect air lines from brake chamber Figure 4-73. Brake Chamber and Air Chamber Unit (M967,
and air chamber unit. M969, and M970 except M970 SN TC-0843, TC-0844, and
TC-103 thru TC-178).

Change 3 4-91
TM 9-2330-356-14

(7) Connect brake lines.

(8) Make and hold a full pressure application (fall

air tank and apply service brakes). Hand tighten the collet
nut. With a drift and hammer tighten nut 1-teeth or
additional 3/16 of a turn. Release service brakes.

(9) Uncage spring in fail-safe unit.

4-40. Brake Chamber-Fail-Safe Unit Test and
Replacement, M967A1, M969A1, and
M970A1 including M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178.
a. Test. Perform leakage test (para 4-38). The
fail-safe unit will also be pressurized when the emergeney
line is connected.

b. Replacement of Fail-Safe Unit.

(1) Manually cage spring in hit-safe unit (para 2-4).

(2) Release air pressure by opening drain valves on

both air reservoirs (fig. 4-79).

(3) Tag and disconnect brake hoses from brake

chambers and relay valve.

(4) Remove cotter pin and clevis pin from slack

adjuster and yoke. Figure 4-74. Removing Fail-Safe Air Brake Chamber
(M967A1, M969A1, and M970A1 including M970 SN
(5) Remove two nuts and washers from fail-safe unit TC-0843, TC-0844, and TC-103 thru TC-178).
mounting bolts and remove fail-safe unit from bracket.
4-41. Slack Adjuster, M967A1, M969A1, and
(6) Install new fail-safe unit to bracket with two M970A1 mcluding M970 SN TC-0843,
washers and nuts. Do not tighten nuts. Position ports on the TC-0844, andTC-103thruTC-178 (Fig. 4-75).
fail-safe unit to aline with brake hoses. Tighten nuts.

(7) Connect hoses to brake chamber, a. Removal.

(8) Install yoke to adjuster with clevis pin and cotter (1) Remove cotter pin and clevis pin securing
pin. Bend back ends of cotter pinto secure. yoke to slack adjuster.

(9) Manually release spring in fail-safe unit. (2) Remove retaining ring from end of camshaft.
(10) Adjust brakes (para 4-34). (3) Using a brass hammer, tap on slack adjuster
lightly until it comes off the camshaft.
c. Repair of Fail-Safe Unit.
b. Inspection and Repair.

WARNING
WARNING

DO NOT attempt to repair brake chamber fail- Dry cleaning solvent P-D-680 is toxic and
safe unit. It is dangerous because of high flammable. Always wear protective goggles
spring compression. No repair is authorized
for fail-safe unit. and gloves, and use only In a well-ventilated
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat.
The solvents flash point is 100 F-138F
(38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh

4-92 Change 3
 TM 9-2330-356-14

air and medical help. If solvent contacts eyes, 4-42. Brake Camshaft, M967A1, M969A1, and
Immediately wash your eyes with water and M970A1 including M970 SN TC-0843,
get medical aid. TC-0844, andTC-103 thru TC-178 (Fig. 4-76).
a . Removal.

(1) Thoroughly clean slack adjuster, splines of (1) Remove wheel and drum assembly
camshaft, and other metal parts using dry cleaning solvent (para 4-49).
(item 11, Appendix E) and a stiff fiber brush. Make sure
(2) Remove brake shoes (para 4-34).
parts are completely dry.
(3) Remove slack adjuster (para 4-41).
(2) Inspect slack adjuster for external damage,
and the worm shaft hex head for being frozen or binding. (4) Expand retaining ring and slide camshaft part
way out of spider. Remove retaining ring.
(3) Replace all parts which are not in good (5) Slide camshaft out of spider.
condition.
(6) Remove two washers and two seals from
camshaft.
(7) Remove spider bushing.
(8) Remove four nuts, four washers, and four
screws securing camshaft bushing assembly to bracket.
(9) Remove inner retainer and outer retainer.
(10) Remove camshaft bushing and two
preformed packings.
b. Inspection and Repair.

WARNING

Dry cleaning solvent P-D-680 is toxic and

flammable. Always wear protective
goggles and gloves, and use only in a
well-ventilated area. Avoid contact with
skin, eyes, and clothes, and DO NOT
breathe vapors. DO NOT use near open
flame or excessive heat. The solvents
flash point Is 100F-138F (38C-59C).
If you become dizzy while using cleaning
Figure 4-75. Removing and Installing Slack Adjuster solvent, Immediately get fresh air and
(M967A1, M969A1, and M970A1 including M970 SN medical help. If solvent contacts eyes,
TC-0843, TC-0844, and TC-103 thru C-178).
Immediately wash your eyes with water
c. Installation. and get medical aid.
Compressed air used for drying or
(1) Place slack adjuster into position on cam-
cleaning purposes must not exceed 30 psi
shaft. Use a brass hammer to lightly tap it into place. (207 kPa). Wear protective clothing
(goggles and gloves) and use caution to
(2) Install retaining ring into recess on camshaft. avoid Injury to personnel.

(3) Place yoke into position at slack adjuster and NOTE

install clevis pin. Use a wire brush to clean camshaft and Inner
and outer retainers, If required, to remove
(4) Install cotter pin to secure clevis pin. caked-on dirt and corrosion.

(5) Adjust slack adjuster (para 4-34). (1) Thoroughly clean all metal parts with dry
cleaning solvent (item 11, Appendix E). Dry the parts with
(6) Lubricate slack adjuster (fig. 3-16). low pressure compressed air.

Change 3 4-93
 TM 9-2330-356-14

(2) Inspect camshaft for twists and bends. c. Installation.

(3) Inspect inner and outer retainers for bends (1) Assemble camshaft bushing, two preformed
and cracks. packings, and inner and outer retainers to bracket in order
shown.
(4) Inspect spider bushing and camshaft bushing
for cracks and excessive wear. (2) Install four screws, four washes, and four
nuts to secure camshaft bushing assembly to the bracket.
Tighten four nuts.
(5) Replace all parts which are not in good
condition.
(3) Install spider bushing.

Figure 4-76. Brake Camshaft Removal and Installation (M967A1, M969A1, and M970A1 including M970 SN
TC-0843, TC-0844, and TC-103 thru TC-178).

4-94 Change 3
 TM 9-2330-356-14

(4) Install seal and washer, slide camshaft part (2) Clean groove in body. Partially collapse
way through spider, and install second seal and washer on packing ring with fingers and put one side of packing ring
camshaft in order shown. flange into groove. Use a blunt-ended tool to push ring in
place. The packing ring must lie flat with no twists or
(5) Expand retaining ring and slide over bulges.
camshaft. Install camshaft and lock in place with retaining
ring. c. Repair.

(6) Install slack adjuster (para 4-41). (1) Tighten screws holding air line clips.

(7) Install brake shoes (para 4-34). (2) Tighten fittings if leaks are found. Replace
lines or fittings if leaks cannot be stopped (para 4-48).
(8) Install wheels and drum assembly (para 4-49).
4-44. Emergency Relay Valve (Fig. 4-78)
(9) Adjust slack adjuster (para 4-34).
a. Test.
(10) Lubricate camshaft (fig. 3-18).
(1) When the brake pedal or trailer hand brake
4-43. Service and Emergency Couplings, Air lever of the towing vehicle is depressed or applied, air is
Lines and Fittings delivered through the service line to the emergency relay
valve.
a. Test.
(2) The emergency relay valve releases air from
(1) Connect air brake hose couplings from the primary brake reservoir to the brake chambers to set
towing vehicle to semitrailer (fig. 2-1). Apply brakes and the brakes.
coat hose couplings, connectors, and fittings of emergency
and service lines with soap and water solution. No leakage (3) Engage the service brake and apply soapy
is permissible. water to exhaust port on top of the emergency relay valve.
If there is leakage, replace the relay valve.
(2) Check air lines and fittings for restrictions
caused by dents or kinks. (4) Apply and release the service brake several
times. Listen for immediate response from the relay valve.
(3) Coupling damage is usually caused by worn, If there is hesitation in brake application and release,
damaged, or improperly installed packing ring. Install new replace the relay valve.
packing ring to stop leaks (para 4-43).
b. Replacement.
b. Packing Ring Replacement (Fig. 4-77).
(1) Block semitrailer wheels to prevent move-
(1) Remove packing ring by prying out of ment.
coupling with screwdriver or other suitable tool.
(2) Disconnect towing vehicle and/or air brake
lines and open air drain valves on bottom of both air
resevoirs (fig. 4-79). Leave open while replacing valve.

(3) Tag air lines for identification at assembly.

Disconnect hose and tube fittings from valve. Remove
double check valve and unscrew valve from nipple in
reservoir.

(4) Screw new valve onto nipple. Install double

check valve, and reconnect hose and tube fittings.

(5) Close air drain valves in both reservoirs.

Connect towing vehicle and fill the reservoir.

(6) Test service brakes and parking brakes

(para 4-44).

Figure 4-77. Packing Ring Installation. (7) Remove blocking from semitrailer wheels.

4-95
TM 9-2330-356-14

(2) Check fittings, valve, and air drain valves for

leaks. Tighten if leaks are found.

(3) Remove blocks from semitrailer wheels.

Figure 4-78. Emergency Relay Valve Installation

(M970 installation shown Typical of M967,
M967A1, M969, and M969A1 semitrailers,
except for brake interlock connection on
M970 and M970A1).
Figure 4-79. Air Reservoirs.
4-45. Air Reservoirs (Fig. 4-79) 4-46. Pressure Protection Valve (Fig. 4-80)
a. Removal. a. Test and Adjustment.
(1) Block semitrailer wheels to prevent (1) Attach air system test gage (table 4-1) to
movement. trailer Emergency gladhand with gage closest to trailer.
(2) Drain air from reservoir by opening air drain (2) Attach air supply line to valve end of test
valves on bottom of both air reservoirs. gage. Air supply can be either a tractor or stationary
source.
(3) If air drain valves are to be replaced, unscrew
and replace with new ones. (3) Pressurize system. Close valve on test gage
when system is full. Note gage reading. Drain secondary
(4) If rear reservoir is to be replaced, disconnect (forward) air reservoir by opening drain valve on bottom of
hoses and fittings to emergency relay valve. Relay is reservoir. When all air has exhausted from secondary
mounted to a nipple on rear reservoir. system, gage should read 75 psi. If pressure is not correct,
adjust pressure protection valve as follows:
(5) Remove air fittings on each end of reservoir.
Remove two mounting bolts on each end of reservoir and (a) Loosen locknut (4) at base of cap.
remove reservoir. If rear reservoir is removed, emergency
relay valve will be removed with it. Remove relay valve by (b) Turn cap (5) clockwise to increase pres-
unscrewing from nipple. sure setting.
b. Installation. (c) Turn cap counterclockwise to decrease
setting.
(1) Install new reservoir, bolt in place and
reconnect fittings. If rear reservoir was replaced, screw (4) Repeat step (3) until desired pressure is
emergency relay valve onto reservoir nipple before obtained, then tighten lock nut.
replacing reservoir on frame. Close air drain valves. Refill
with air and check reservoir for leaks. (5) Remove air system test gage.

4-96
 TM 9-2330-356-14

Figure 4-80. Pressure Protection Valve.

b. Removal. 4-47. Parking Brake Control Valve (Fig. 4-81)

(1) Block semitrailer wheels to prevent a. General. The parking brake control valve is
movement. basically an off-on, push-pull control valve. Its function is
to release the fail-safe (spring) brakes for semitrailer
(2) Exhaust air from system by opening drain movement by other than a towing vehicle.
valves on bottom of air reservoirs.
(1) The valve can only be used when all air has
(3) Remove air line (1, fig. 4-80) and adapter (2) been exhausted from the rear (primary) reservoir.
from end of valve.
(2) In the OUT position, the valve is closed,
(4) Unscrew valve (3) from nipple (6). allowing springs in the fail-safe chambers to apply braking
pressure.
(5) Remove elbow (7) and bushing (8) from air (3) In the IN position, air is delivered from the
reservoir if replacement is necessary.
front (secondary) reservoir to the fail-safe chamber,
compressing the spring, and releasing the brakes.
c. Repair. No repair is authorized for the pressure
protection valve. Replace valve if malfunction occurs. (4) When the trailer is connected to a towing
vehicle, air from the emergency line is applied to the pilot
d. Installation. port of the valve, maintaining the OUT position.
However, air from the emergency line is also directly
(1) Apply antiseize tape (item 28, Appendix E) to applied to the fail-safe chamber compressing the spring
male threads and install new nipple (6) in side port of during normal towing operation.
valve. Turn valve and nipple into elbow (7) on air reservoir.
b. Test. Internal leakage in the valve is indicated if
(2) Install air line (1) and adapter (2) on valve. the spring brakes do not apply when the button is pulled
out and the system is at full pressure. External leakage can
(3) Test and adjust valve (step a). be detected by applying soapy water around the valve
stem. No leakage is permitted. If the valve leaks or does
(4) Remove blocking from semitrailer wheels. not operate, replace valve.

4-97
TM 9-2330-356-14

(6) Remove fittings from valve ports.

d. Repair. No repair is authorized for the parking

brake control valve. If malfunction or leakage is indicated,
replace the complete valve.

e. Installation.

(1) Install fittings on valve ports. Use antiseize

tape (item 28, Appendix E) on male pipe threads. Remove
button and nut from control valve so that valve can be
inserted into mounting bracket.

(2) Position control valve in mounting bracket.

Install nut on neck of control valve and tighten securely.

(3) Install button on end of valve stem. Aline

hole in button with hole in stem and install roll pin.

(4) Connect air lines to fittings on valve ports and

remove tags.

(5) Remove blocking from semitrailer wheels.

4-48. Air Lines, Valves, and Fittings (Figs. 4-82

and 4-83)

a. General. The general arrangement of the air

brake system on the semitrailers is shown in figures 4-82
and 4-83. Nylon tubing connects the gladhands on front of
semitrailer to the brake relay valve on rear air reservoir.
Clips fasten the tubing to the underside of the tank and to
the frame members. Grommets are installed to protect
the tubing where it passes through the frame and cross
members. Hoses and tubing connect the brake chambers
to the reservoirs and relay valve.

Figure 4-81. Parking Brake Control Valve Installation. b. Maintenance. Visually inspect for damage to air
lines, loose clips, or missing grommets. Also check the
c. Removal. following:

(1) Block semitrailer wheels to prevent move- (1) Brake hoses should be looped in a way that
ment. prevents the hoses from hanging below the axle.

(2) Separators on brake hoses should be

(2) Exhaust air from system by opening drain
positioned to prevent brake hoses from rubbing against
valves on bottom of air reservoirs.
axles or other brake hoses.

(3) Tag and disconnect airlines from elbows and (3) Clips should be bent down securely on tubing.
adapter on control valve.
c. Replacement of Nylon Tubing.
(4) With a small drift and hammer, remove roll
pin which secures button to stem of control valve. Remove (1) Block semitrailer wheels to prevent move-
button. ment.

(5) Remove nut on neck of valve and pull the (2) Exhaust air from system by opening drain
control valve from the mounting bracket. valves on bottom of air reservoirs.

4-98
 TM 9-2330-356-14

Figure 4-82. Air Brake System (M967, M969, and M970 except M970 SN TC-0843, TC-0844, and TC-103 thru TC-178).

Change 3 4-99
 TM 9-2330-356-14

Figure 4-83. Air Brake System (M967A1, M969A1, and M970A1 including M970 SN TC-0843, TC-0844, and TC-103
thru TC-178).

4-100 Change 3
 TM 9-2330-356-14

(3) Disconnect tubing from fitting and remove (5) Trim ends of tubing to get a smooth, square
the insert, compression sleeve and nut on both ends of cut. Slide tubing nut on end of tube. Slide impression
tubing. Release the clips and pull tubing through sleeve over end oft tubing. Install tubing insert. Connect
grommets. tubing to adapter fitting and tighten tubing nut securely.
Do the same procedure on both ends.
NOTE
(6) Check replaced tubing for leaks. No leaks are
Tubing is stocked in bulk lengths. Measure permitted.
original tubing and cut new tubing to same
length. (7) Remove blocking from semitrailer wheels.

d. Air Line Fittings. Use antiseize tape (item 28,

(4) Install tubing on semitrailer and bend clips Appendix E) on all male pipe threads. Take care not to let
down securely to hold tubing in position. any of the tape get into the system.
Section XIII. MAINTENANCE OF WHEELS, HUBS, AND DRUMS
4-49. Wheels, Hubs, and Drums (2) Manually compress fail-safe chamber power
spring (para 2-4).
WARNING
(3) Release air pressure by opening drain wolves
Spare tire vveighs 190 pounds. Four-person on both air reservoirs (fig. 4-79).
lift, or suitable lifting device, is required.
(4) Jack up axle until tires are clear of ground.
a Tire and Wheel Replacement (Fig. 4-84). Support rude with jack stand or blocking.

(1) Removal. Bbck any of the tires that are not (5) Remove ten screws and lockwashers
being removed. Jack up axle until tire is clear of ground. (fig. 4-86) securing hub cap to hub. Remove hub cap and
Support axle with jack stand or blocking. Remove outer hub cap gasket. Discard gasket.
stud nuts (fig. 4-84). Remove tire and wheel assembly. If
inner tire must be removed, remove the ten inner stud (6) Remove outer wheel bearing nut (fig. 4-86),
nuts (fig. 4-84), and remove inner tire and wheel assembly. leek ring, and inns wheel bring nut.

(7) Remove outer wheel bearing cone.

(2) Repair.

(a) Repair tubes (para 4-50). NOTE

If wheel lift jack is not available follow steps
(b) Refer to general support maintenance (8) through (10).
for repair of tires.
(8) Apply grease (item 17, Appendix E) to a
(3) Installation. Position inner wheel over studs 45x20-inch 10 gage steel plate (table 4-1), laying a grease
on axle hub. Replace ten inner stud nuts (fig. 4-84), lower track approximately lo-inches wide the length of the
tire to ground, and tighten to 450-500 lb.-ft. using plate.
sequence in figure 4-85. Jack up rude and position outer
wheel over inner stud nuts (fig. 4-84). Lower tire to (9) Place the grease plate, with greased side up,
ground, and using sequence in figure 4-85, tighten nuts to under the tires. Lower tires so that they are just resting on
450-500 lb.-ft. the grease plate, with the majority of the vehicle weight
b. Removal of Tires, Wheels, Hub, and Drum as an still on the jack.
Assembly (M967, M969, and M970 except M970 SN
TC-0843, TC-0844, and TC-103 thru TC-178) (Fig. 4-86). NOTE
It maybe necessary to back the automatic
WARNING adjusters out to allow brake shoes to dear
ridge on brake drum (para 4-33).
The fall-safe chamber power spring must be
manually compressed and the air reservoirs (10) Wide tires, wheels, hub, and brake drum off of
must be vented of pressure before removal of axle spindle.
hub and drum assembly.

(1) Block any of the tires that are not being

removed.

Change 3 4-101
 TM 9-2330-356-14

Eigure 4-84. Replacement of Tires and Wheels.

Figure 4-85. Tightening Order for Wheel Stud Nuts.

4-102
 TM 9-2330-356-14

Figure 4-86. Hub, Drum, and Wheel Bearings (M967, M969, and M970 except M970 SN TC-0843, TC-0844,
and TC-103 thru TC-178).

Change 3 4-103
 TM 9-2330-356-14

c. Replacement of Wheel Bearings (M967, M969, and NOTE

M970 except M970 SN TC-0843, TC-0844, and TC-103 thru
TC-178) (F{g. 4-86). If wheel bearings need replacing, bearing
(1) Removal. cups must also be replaced (Step (d)).

(a) Remove tires, wheels hub and drum as (b) Inspect wheel bearings for cracks or
an assembly (b above). breaks in bearing cage, etching or pitting on roller
surfaces, and any evidence of wear. Replace if worn or
(b) Remove wiper (fig. 4-86) from either the damaged.
hub or the axle spindle.
(c) Pack bearings from large end of cone
with grease (item 17, Appendix E), ensuring that ail
NOTE cavities between rollers and cage are filled. Cover
If no seal puller is available, drive bearing bearings with a clean, lint-free rag until time to install.
cone and seal out using a brass drift and
(d) Inspect bearing cups in hub for pits,
hammer from the outer side of the hub.
grooves, or flaking. If damaged, use a puller to remove.
Drive in new bearing cups with a suitable driver.
(c) Remove inner seal with a seal puller and
then remove inner wheel bearing cone. (e) Inspect hub cap for damage to flange
that would allow water to leak into wheel bearings.
(2) Inspection and Repair. Replace if damaged.

(f) Replace hub cap gasket.

WARNING
(g) Cheek threads of studs, screws, and nuts
Dry cleaning solvent P-D-680 Is toxic and for damage.
flammable. Always wear protective
(h) Inspect brake drum for pitting or
goggles and gloves, and use only In a well-
scoring. Inspect hub bearing surface for damage. If brake
ventilated area. Avoid contact with skin,
drum is damaged, notify direct support maintenance for
eyes, and clothes, and DO NOT breathe va-
repair.
pors. DO NOT use near open flame or ex-
cessive heat. The solvents flash point is (3) Installation (Figs. 4-86 and 4-87).
100F-138F (38C-59C). If you be-
come dizzy while using cleaning solvent, (a) Ensure that the axle spindle is
Immediately get fresh air and medical help. thoroughly clean.
If solvent contacts eyes, Immediately wash
your eyes with water and get medical aid. (b) Install inner seal and wiper using seal
replacer.
Compressed air used for drying or clean-
ing purposes must not exceed 30 psi (c) With tire, wheel, hub. and brake drum
(207 kPa). Wear protective clothing assembly in upright position, install inner wheel bearing.
(goggles and gloves) and use caution to
avoid injury to personnel. (d) Install tire, wheel, hub, and brake drum
assembly (d below).
CAUTION d. Installation and Adjustment of Tires, Wheels, Hub,
and Drum as an Assembly (M967, M969, and M970 except
Do not clean parts with gasoline, In a hot M970 SN TC-0843, TC-0844, and TC-103 thru TC-178).
solution tank, or with water and alkaline NOTE
solutions. Separate wheels and hub before
cleaning. Dry cleaning solvent will Jack may be adjusted to compensate for
deteriorate the tires. hub/spindle misalinement when installing
hub to spindle.
Do not spin bearings with compressed air.
(1) Position hub and drum assembly on spindle
(u) Thoroughly clean all parts with dry with tires resting on greased plate. If drum binds on brake
cleaning solvent (item 11. Appendix E) and a stiff fiber shoes when partially installed, turn both adjusting bolt
brush. Ensure that parts are completely dry. Use low starwheels to reduce brake shoe spread (para 4-33). Push
pressure compressed air to dry parts, if available. hubs fully onto spindle.

4-104 Change 3
 TM 9-2330-356-14

Figure 4-87. Wheel Bearing Installation (M967, M969, and M970 except M970 SN TC-0843, TC-0844, and TC-103
thru TC-178).
(2) Install outer bearing cone by inserting into (7) Install hub cap and secure with ten capscrews
bearing cup. Install inner wheel bearing nut against outer and lockwashers. Tighten screws to 16-20 lb.-ft.
bearing. Provide for sufficient clearance between brake
shoe and drum so brake drag will not interfere with (8) Pressurize air system by attaching towing
bearing adjustment. vehicle air lines to semitrailer and starting towing vehicle
engine.
(3) Jack wheel completely off ground.
(9) Adjust brakes (para 4-33).
(4) Tighten inner wheel bearing adjusting nut to
200 lb.-ft. while rotating hub and drum assembly in both
(10) Manually release fail-safe chamber power
directions.
spring (para 2-4).
(5) Back off inner wheel bearing adjusting nut
approximately (2 flats) to 1/3 (22/3 flats) turn so dowel on (11) Remove any blocking from tires.
nut will aline with hole in lock ring (fig. 4-86) when tab on
lock ring is positioned on axle spindle keyway. Install and e. Removal of Tires, Wheels, Hub, and Drum as an
tighten outer wheel bearing jam nut to 250-300 lb.-ft. Assembly (M967A1, M969A1, and M970A1 including M970
SN TC-0843, TC-0844, and TC-103 thru TC-178) (Fig 4-88).
(6) Apply light coat of grease (item 17, Appendix (1) Block any of the tires that are not being
E) to new hub cap gasket and position gasket on hub. removed.

Change 3 4-105
TM 9-2330-356-14

NOTE
WARNING
If no seal puller is available, drive bearing
The fall-safe chamber power spring must be cone and seal out using a brass drift and
manually compressed and the air reservoirs hammer from the outer side of the hub.
must be vented of pressure before removal of
hub and drum assembly. (b) Remove seal (fig. 4-88) with a seal puller
and remove inner wheel bearing cone.

(2) Manually compress fail-safe chamber power (2) Inspection and Repair.
spring (para 2-4).

WARNING
(3) Release air pressure by opening drain valves
on both air reservoirs (fig. 4-79).
Dry cleaning solvent P-D-680 is toxic and
flammable. Always wear protective
(4) Jack up axle until tires are clear of ground. goggles and gloves, and use only In a
Support axle with jack stand or blocking. well-ventilated area. Avoid contact with
skin, eyes, and clothes, and DO NOT
(5) Remove six bolts and lockwashers (fig. 4-88) breathe vapors. DO NOT use near open
securing hub cap to hub. Remove hub cap and hub cap flame or excessive heat. The solvents
gasket. Discard gasket. flash point is 100F-138F (38C-59C).
If you become dizzy while using cleaning
solvent, immediately get fresh air end
(6) Remove outer wheel bearing nut (fig. 4-88), medical help. if solvent contacts eyes,
wheel bearing washer, lock ring, and inner wheel bearing Immediately wash your a yes with water
nut. and get medical aid.

(7) Remove outer wheel bearing cone. Compressed air used for drying or
cleaning purposes must not exceed 30 psi
(207 kPa). Wear protective clothing
NOTE (goggles and gloves) and use caution to
avoid injury to personnel.
If wheel lift jack Is not available, follow steps
(8) through (10). CAUTION

(8) Apply grease (item 17, Appendix E) to a Do not clean parts with gasoline, in a hot
45x 20-inch 10 gage steel plate (table 4-1), laying a grease solution tank, or with water end alkaline
track approximately 10-inches wide the length of the solutions. Separate wheels and hub before
plate. cleaning. Dry cleaning solvent will
deteriorate the tires.

(9) Place the grease plate, with greased side up, Do not spin bearings with compressed air.
under the tires. Lower tires so that they are just resting on
the grease plate, with the majority of the vehicle weight (a) Thoroughly clean all parts with dry
still on the jack. cleaning solvent (item 11, Appendix E) and a stiff fiber
brush. Ensure that parts are completely dry. Use low
(10) Slide tires, wheels, hub, and brake drum off of pressure compressed air to dry parts, if available.
axle spindle.
NOTE
f. Replacement of Wheel Bearings (M967A1, M969A1,
and M970A1 including M970 SN TC-0843, TC-0844, and TC- If wheel bearings need replacing, bearing
cups must also be replaced (Step (d)).
103 thru TC-178) (Fig. 4-88).
(1) Removal. (b) Inspect wheel bearings for cracks or
breaks in bearing cage, etching or pitting on roller
(a) Remove tires, wheels, hub, and drum as surfaces, and any evidence of wear. Replace if worn or
an assembly (e above). damaged.

4-106 Change 3
 TM 9-2330-356-14

Figure 4-88. Hub, Drum, and Wheel Bearings (M967A1, M969A1, and M970A1 including M970 SN TC-0843, TC-0844,
and TC-103 lhru TC-178).

Change 3 4-107
TM 9-2330-356-14

(c) Pack bearings from large end of cone (b) With tire, wheel, hub, and brake drum
with grease (item 17, Appendix E), ensuring that all assembly in upright position, install inner wheel bearing:
cavities between rollers and cage are filled. Cover
bearings with a clean, lint-free rag until time to install. (c) Install inner seal using seal replacer.

(d) Inspect bearing cups in hub for pits, (d) Install tire, wheel, hub, and brake drum
grooves, or flaking. If damaged, use a puller to remove. assembly (step g).
Drive in new bearing with a suitable driver.
g. Installation and Adjustment of Tires, Wheels, Hubs,
(e) Inspect hub cap for damage to flange and Drum as an Assembly (M967A1, M969A1, and M970A1
that would allow water to leak into wheel bearings. including M970 SN TC-0843, TC-0844, and TC-103 thru TC-
Replace if damaged.
178).
(f) Replace hub cap gasket. NOTE

(g) Check threads of studs, screws, and nuts Jack may bc adjusted to compensate for
for damage. hub/spindle misalinement when installing
hub to spindle.
(h) Inspect brake drum for pitting or
scoring. Inspect hub bearing surface for damage. If brake (1) Position hub and drum assembly on spindle
drum is damaged, notify direct support maintenance for with tires resting on greased plate. If drum binds on brake
repair, shoes when partially installed, adjust brake shoes to
(3) Installation (Figs. 4-88 and 4-89). reduce brakeshoe spread (para 4-34). Push hubs fully onto
spindle.
(a) Ensure that the axle spindle is
thoroughly clean. (2) Jack wheel completely off ground.

Figure 4-89. Wheel Bearing Installation (M967A1, M969A1, and M970A1 including M970 SN TC-0843, TC-0844, and
TC-103 thru TC-178).

4-108 Change 3
 TM 9-2330-356-14

(3) Tighten inner adjustment nut to minimum of 75 ft- (c) Pack bearings from large end of cone
lb to ensure proper seating of e bearings and cup in wheel hub.
with grease (item 17, Appendix E) making sure all cavities
(4) Loosen inner adjustment nut so wheel will turn between rollers and cup are filled.
freely.
(5) Retighten inner adjustment nut to 50 ft-lb while (d) Install hub onto axle spindle. Install
rotating wheel, in order to properly position bearings for final inner wheel bearing nut, lock ring, and outer wheel
adjustment. bearing nut, but do not tighten.
(6) Looscn inner adjustment nut 1/3 turn.
(e) Install brake drum over the hub and
WARNING secure with five screws.
Failure to beck off the inner adjustment nut could
cause bring and axle spindle overheating or dam- (f) Install wheels and adjust wheel bearings.
age,.which could result m the wheel Iocking up or
coming off during vehicle operation, resulting in i Wheel Studs (M967A1, M969A1, and M970A1
property damage or loss of life. including M970 SN TC-0843, TC-0844, and TC-103
thru TC-178).
(7) Install spindle nut lockwasher so that dowel on inner (1) Removal (Fig. 4-88).
nut alines with hole in lockwasher and washer tang tits in spindle
keyway.
(a) Remove wheels and tires.
WARNING
Failure to torque outer locknut properly could (b) Remove six bolts and lockwashers that
cause wheel to come off during vehicle operation, fasten the hub cap to the hub. Remove hubcap and gasket.
which could result m property damage or loss of life.
If an external tan or setscrew-type lockwaaher (c) Using wheel bearing nut wrench remove
is used, it is important to remember to bend tabs over outer wheel bearing nut, wheel bearing washer, lock ring,
outer locknut, or to install the setscrew in lockwasher,
after the outer nut has been properly torqued. and inner wheel bearing nut.
(8) Install outer locknut and tighten to 250-400 ft-lb. (d) Remove outer wheel bearing crone.
(9) Apply a light coat of grease (Item 17, Appendix E)
to new hub cap gas et and position gasket on hub. (e) Remove hub and drum from axle spindle
being careful not to damage seal.
(10) Install hub cap and secure with six bolts and
lockwashers. Tighten bolts to 16-20 ft.-lb.
(f) Remove nuts, lockwashers, and broken
(11) Pressurize air system by attaching towing vehicle studs from hub and drum.
air lines to semitrailer and starting towing vehicle engine.
(12) Adjust brakes (para 4-34). (2) Installation (Fig. 4-88).
(13) Manually release fail-safe chamber power spring
(para 2-4). (a) Install studs (short side from shoulder
facing out) into hub and drum and secure studs with
(14) Remove any blocking from tires. lockwashers and nuts.
h. Wheel Studs (M967, M969, and M970 except M970 SN
TC-0843, TC-0844, and TC-103 thru TC-178). (b) Install hub and drum onto axle spindle.
(1) Removal (Fig. 4-86).
(c) Pack bearing from large end of cone with
(a) Remove tire and wheel. grease (item 17, Appendix E) making sure all cavities
(b) Remove five screws that fasten brake drum to between rollers and cup are filled.
hub and remove brake drum.
(d) Install outer wheel bearing cone in hub.
(c Remove ten capscrews that fasten hub cap to
hub. Remove hub cap and gasket.
(e) Install inner bearing nut, lock ring,
(d) Using wheel bearing nut wrench, remove outer wheel bearing washer, and outer wheel bearing nut, but do
wheel bearing nut, lock ring, and inner wheel bearing nut.
not tighten.
(e) Remove outer wheel bearing cone.
(f) Install wheels and tires and adjust wheel
(f) Remove hub from axle spindle being careful
not to damage wiper and seal. bearings.
(g) l)rive broken wheel studs from hub. 4-50. Tire and Tube
(2) Installation (Fig. 4-86).
a Service. Gage tires for correct pressure. For hard
(a) Install wheel studs into hub. Use a hammer and surface roads, inflate to 60 psi; for cross-country and sand,
driver to install studs.
inflate to 40 psi.
(b) If wiper remained with axle spindle when hub
was removed, remove roper and install in hub. Install outer wheel
bearing cone in hub.
Change 3 4-109
TM 9-2330-356-14

b. Inspection. Remove objects such as nails or glass. c. Repair. Refer to TM 9-2610-200-24 for
Check for apparent loss of air, unusual wear, or missing instructions on dismounting, repair, and mounting of tire
valve caps. Replace as required. and tube on rim.

Section XIV. MAINTENANCE OF FRAME AND TOWING ATTACHMENTS

4-51. Emergency Valve Control and Cable (4) Cheek that emergency valve will open and
(Fig. 4-90) close when control handle of valve operator A is operated.

a. Cleaning and Inspection. (5) Pull on valve operator A to open emergency

valve. Check that pulling on the emergency valve shut-off
handle will close the emergency valve.
WARNING
(6) Repeat steps (1) through (5) if cables do not
Dry cleaning solvent P-D-680 Is toxic and function properly.
flammable. Always wear protective goggles
and gloves, and use only In a well-ventilated d. Removal. Tag and disconnect control cables from
area. Avoid contact with skin, eyes, and the emergency valve control. Remove two capscrews and
clothes, and DO NOT breathe vapors. DO nuts that secure control to side of cabinet. Remove valve
NOT use near open flame or excessive heat. control.
The solvents flash point is 100F-138F
(38C-59C). If you become dizzy while us- e. Disassembly and Assembly (Fig. 4-90).
ing cleaning solvent, Immediately get fresh
air and medical help. If solvent contacts eyes, (1) Remove roll pin (8, fig. 4-90) securing shaft
immediately wash your eyes with water and (9) to bracket (7).
get medical aid.
(2) Remove shaft (9). Remove lever (1) and the
(1) Clean control handle of valve operator A and trip bar assembly (10).
connecting parts, cable and emergency valve with dry
cleaning solvent (item 11, Appendix E). (3) Remove cotter pin (12) and clevis pin (13) that
secures offset link (2) to handle(l). Remove offset link(2).
(2) Inspect for cracks in control handle, frayed
cables, loose U-bolts, loose or bent cable runways, cotter (4) Disassemble further if needed (fig. 4-90).
pins, and control mounting bolts.
(5) Reassemble by reversing steps (1) through
b. Service. (4).

(1) Tighten any loose U-bolt c-able connectors, f. Installation.

adjusting bolts, and bracket mounting bolts at each end of
cable. Adjust if necessary. (1) Mount emergency valve control in place
using two nuts and capserews.
(2) Lubricate all linkage.
(2) Reconnect the cables and adjust (step c).
c. Adjustment.
4-52. Upper Coupler/Kingpin Assembly
(1) Ensure that control handle of valve operator
A is pushed in and that the emergency valve is closed. Pull a. Service.
on handle of the emergency valve shutoff at front curbside
of semitrailer to maintain shutoff handle in the open (1) Remove dust, dirt, and old grease from
position. kingpin.

(2) Loosen U-bolt connectors to loosen cable (2) Grease liberally with clean grease (item 17,
end connections. Appendix E).

(3) Remove all slack in cables, then tighten (3) If semitrailer has a bolt-on kingpin, check
U-bolt connectors. tightness of bolts holding kingpin to plate (fig. 4-91).

4-110
 TM 9-2330-356-14

Figure 4-90. Emergency Valve Control and Cable.

(4) If semitrailer has a bolt-on upper coupler

(kingpin) assembly, check tightness of bolts holding plate
to frame. If bolts are loose, tighten them to 140 lb.-ft.

(5) For replacement of bolt-on upper coupler

(kingpin) assembly, refer to direct support maintenance.
For replacement of bolt-on kingpin, refer to step b.

b. Bolt-on Kingpin Replacement (Early Models)

(fig. 4-91).

(1) Remove eight mounting bolts and remove

kingpin.

(2) Coat mating surfaces with corrosion

preventive (item 10, Appendix E) (fig. 4-91).

(3) Install kingpin and tighten bolts to

250-275 lb.-ft. Figure 4-91. Bolt-on Kingpin Installation (Early Models).

4-111
TM 9-2330-356-14

4-53. Spare Wheel Carrier (Fig. 4-92) (3) Pull axle from shoe to be removed. Remove
shoe.
WARNING b. Installation of Landing Gear Shoe.

Dry cleaning solvent P-D-680 is toxic and (1) Position shoe at end of landing gear leg
flammable. Always wear protective goggles assembly. Insert axle through one side of shoe, through
and gloves, and use only in a well-ventilated inner washer, leg, other inner washer, and through other
area. Avoid contact with skin, eyes, and side of shoe.
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat. (2) Reinsert outer washers and roll pins.
The solvents flash point is 100F-138F
(38C-59C). if you become dizzy while us- (3) Remove jacks and blocking.
ing cleaning solvent, immediately get fresh
air and medical help. If solvent contacts eyes, c. Removal of Landing Gear Leg Assembly.
immediately wash your eyes with water and
get medical aid. (1) Remove shoe of leg to be removed (para a).

a. Service. Clean with water and stiff brush. Use dry (2) Remove two capscrews, lockwashers, and
cleaning solvent (item 11, Appendix E) to degrease. nuts which attach braces (fig. 4-93) to the leg assembly.
Remove capscrew, lockwasher, and nut attaching rod
b. Replacement. If bracket needs replacing, notify coupling to leg. If rod and brace cannot be moved out of
direct support maintenance. way, loosen nuts on ends of brace attached to semitrailer
frame.
c. Repair. Repair is limited to straightening bracket.
(3) If leg with gear box is to be removed, remove
capserew, washer, and nut that attaches coupling to leg.
Remove four mounting capscrews, washers, and nuts, and
remove gearbox assembly and coupling,

(4) Remove eight capscrews, washers, and nuts

securing leg to semitrailer frame. Remove leg.

d. Installation of Landing Gear Leg Assembly.

(1) Position leg assembly onto semitrailer frame.

Attach with eight capscrews, washers, and nuts.

(2) Position gearbox assembly and coupling on

landing gear leg. Install two mounting capscrews, washers
and nuts.

(3) Fasten coupling to operating shaft with

capscrew, washer, and nut.

(4) Attach brace to leg assembly with capscrew,

lockwasher, and nut.
Figure 4-92. Spare Wheel Carrier

4-54. Landing Gear (Fig. 4-93) NOTE

Ensure that legs are extended equally before
a. Removal of Landing Gear Shoe. holes are alined and screw inserted in rod
coupling.
(1) Block wheels to prevent semitrailer move-
ment. Lift front end of semitrailer with jacks, and block se-
curely. (5) Attach rod coupling to leg assembly with a
capscrew, lockwasher, and nut.
(2) Remove roll pins and outer washer from
lower ends of leg assembly and axle. (6) Install shoe on leg assembly (para b).

4-112
 TM 9-2330-356-14

Figure 4-93. Landing Gear Installation.

4-113
TM 9-2330-356-14

4-55. Board Assembly, Landing Gear (Fig. 4-94)

a. Replace board assembly by removing two screws,

washers, nuts, handle, and removing chain from handle.
Attach chain to handle and secure handle to board
assembly with two screws, washers, and nuts.

b. Replace chain assembly by removing chain from

bracket and board handle. Attach chain to bracket and
handle.

Figure 4-94. Ground Board Assembly,

Section XV. MAINTENANCE OF TANK BODY PARTS

4-56. Brackets, Splash Plates, and Mudflaps b. Installation.

(Figs. 4-95 and 4-96)
(1) Position front splash plate and fasten to
frame with three bolts and nuts.
a. Removal.
(2) New mudflaps are stocked in one size only.
(1) Remove three bolts and nuts holding front Cut and drill the mudflaps using the dimensions shown in
splash plate to frame. figure 4-98.

(3) Put mudflaps in position, place bracket on top

(2) Remove four bolts, washers, and nuts from side of mudflaps, and fasten to rear bumper with four
bracket holding mudflaps to rear bumper. capscrews, washers, and nuts.

4-114
 TM 9-2330-356-14

TA502358
Figure 4-95. Tank Body Parts (M967, M969, and M970).

4-115
TM 9-2330-356-14

TA221214
Figure 4-96. Tank Body Parts (M967A1, M969A1, and M970A1).
4-57. Miscellaneous Body Parts (Fig. 4-97) (2) Apply antiseize tape (item 28, Appendix E) to
threads of pipe nipple.
WARNING
(3) Install new gasket inside vent cap.
Ladder has narrow tread. Use care when climbing.
a. Vent Caps.
(1) If fuel leakage is evident at vent cap, remove
vent cap and gasket. Discard gasket.

4-116 Change 1
 TM 9-2330-356-14

TA502359
Figure 4-97. Vent Caps and Grounding Studs.

(4) Install vent cap and tighten securely using a (1) Ensure that grounding studs are installed to
pipe wrench. clean, unpainted metal surfaces. If mounting surface is
painted, scrape off paint to bare metal.
b. Grounding Studs.
(2) Tighten grounding stud mounting hardware
securely to ensure a good grounding contact.
NOTE
(3) Check to ensure that International Ground-
For location of all grounding studs, refer to ing Symbol and DO NOT PAINT GND STUD sten-
figures 1-1 through 1-11. cils are present and legible.

4-117
TM 9-2330-356-14

4-58. Tool Box (Fig. 4-99)

a. Replacement.

NOTE
On some semitrailers, tool box may be tack
welded in position. Break weld with a cold
chisel to remove tool box. Do not reweld
when installing tool box.

(1) Remove tool box contents and set aside.

(2) Place a support under tool box to support it

when mounting screws are removed.

(3) Disconnect the emergency valve control (1,

fig. 4-99) by removing capscrew (2) and nut (3).
TA099838
Figure 4-98. Mudflap Modification. (4) Remove two capscrews (4) and nuts (5).

TA099839
Figure 4-99. Tool Box.

4-118
 TM 9-2330-356-14

(5) Remove four capscrews (6) and nuts (7), and 4-60. Manhole and Fill Cover (Fig. 4-100)
remove tool box (8).

WARNING
(6) Install tool box by reversing steps (1) through
(5).
Always relieve pressure in tank shell before
opening manhole cover.
b. Disassembly and Assembly. Refer to figure 4-99
and remove and install any items that need replacement.
a. Adjustment (Fig. 4-100).
4-59. Tank Body (Figs, 4-95 and 4-96) (1) Remove padlock, release safety latch (13),
and open fill cover (7).
Damage to the tank body and evidence of leaks and bent
or broken metal parts will be reported to the responsible (2) Loosen locknut (5) on underside of fill cover
maintenance level for correction. and close fill cover.

TA099840
Figure 4-100. Manhole and Fill Cover.

4-119
TM 9-2330-356-14

(3) Loosen or tighten adjusting bolt (14) in center e. Installation.

of strongback until latch just clears the secondary latch on
end of strongback. (1) Position manhole cover gasket (10). Set
manhole cover (9) in place and retain with clamp (4).
(4) Open fill cover (7) and tighten locknut (5).
(2) Secure clamp with bolt (1), washer (2), and
(5) Close cover and recheck clearances of latch nut (3).
and strongback.
4-61. Ladder and Drain (Figs. 4-95 and 4-96)
b. Removal.
a. Inspection.
(1) Remove bolt (l), washer (2), and nut (3) that
holds manhole clamp (4) to semitrailer. (1) Check ladder and drain pipe connections on
top of semitrailer to ensure that drain holes are open and
(2) Remove clamp ring to free manhole cover (9) free of debris.
and gasket (10).
(2) Check bolts for tightness at top of semitrailer
c. Disassembly. and at bottom.

(3) Check welds on bolt flange on both top and

(1) Remove locknut (5) and remove fill cover (7),
bottom to make sure they are not loose or cracked.
adjusting bolt (14), and spring (15).
b. Service.
(2) Remove vent (8) and gasket (6) from fill cover
(7). If gummed up with product, or if there are signs of (1) Remove any debris from top of semitrailer
obvious damage, replace vent. that may plug drain holes.
(3) Using a punch and hammer, drive pin (11) (2) Tighten bolts if loose.
from safety latch (13). Remove spring (12).
(3) If any welds are cracked or loose, notify direct
d. Assembly. support maintenance for repair.
(1) Position safety latch (13) and spring (12) on c. Replacement.
manhole cover (9). Install pin (11). Peen end of pin to
secure safety latch to manhole cover. (1) Ladder. Remove eight capscrews and nuts and
remove ladder. Install and position new ladder on tank.
(2) Install gasket (6) and vent (8) to fill cover (7). Secure with eight capscrews and nuts.

(3) Install assembled fill cover to manhole (9) (2) Drain Pipes. Remove four capscrews and nuts
using adjusting bolt (14), spring (15), and locknut (5). on each drain pipe. Remove drain pipe. Install and
position new drain pipe on tank, and secure with four
(4) Adjust (step a). capscrews and nuts.

Section XVI. MAINTENANCE OF BODY ACCESSORY ITEMS

4-62. Bulk Transfer Hose Assembly 4-64. Fuel Level Gage (Figs. 4-95 and 4-96)

a. Removal. Remove retainer clips from hose If wooden fuel gage is unreadable or broken, replace. If
retainers (figs. 4-95 and 4-96), slide bar aside, and remove cap, chain, or storage tube is missing or damaged, replace.
hose from trough.

Installation. Put hose in trough, move bar into 4-65. Nozzle, Adapter, and Sampling Bags (M970
b.
and M970A1)
position, and attach retainer clip.

4-63. Grounding Rod (Figs. 4-95 and 4-96) The tool box contains four bags for the underwing and
overwing nozzle, two canvas protector bags for ends of
If grounding rod is bent, straighten rod. Replace any hoses, closed circuit nozzle, and adapter and sampling kit.
damaged or missing chain and clip pin part. If any bags are worn or missing, replace.

4-120
 TM 9-2330-356-14

4-66. Reflectors b. Installation. Fasten new plates to semitrailer with

screws.
a. General. Reflectors are located on the front, near
the marker lights, and on both ends of the hose trough.
4-68. Fire Extinguisher Mounting Bracket.
b. Replacement. (Figs. 4-95 and 4-96)

(1) Peel or scrape old reflector off semitrailer. a. Service. Check tightness of mounting bolts and for
Clean surface thoroughly. damage to retainer bracket.

(2) Peel off reflector backing and place new

b. Replacement.
reflector in position.

4-67. Identification and Instruction Plates (1) Remove protective cover and fire
(Para 1-11) extinguisher.

NOTE (2) Remove four self-locking nuts, flatwashers,

and capscrews. Remove mounting bracket.
Some instruction plates have been mounted
with rivets. Drill rivets out and replace with
proper machine screw. (3) Install new mounting bracket and fasten with
four capscrews, flatwashers, and self-locking nuts.
a. Removal. Remove screws holding plates to
semitrailer. (4) Install fire extinguisher and protective cover.

Section XVII. MAINTENANCE OF ENGINE

4-69. General. Immediately wash your eyes with water and

get medical aid.
Detailed information concerning maintenance of the
engine assembly is found in Chapters 5 and 7 of this
manual. Procedures covering replacement of engine a. Periodically clean all outside surfaces of the
engine with dry cleaning solvent (item 11, Appendix E).
components and accessories are contained in subsequent
paragraphs of this section.
b. Clean battery and cables (para 4-23).
4-70. General Engine Servicing
4-71. Crankcase, Cylinder Head, and Block

WARNING a. Draining Crankcase.

Dry cleaning solvent P-D-680 is toxic and (1) Place suitable container under crankcase
flammable. Always wear protective goggles drain plug and remove drain plug (fig. 4-101). Drain oil
and gloves, and use only in a well-ventilated into container.
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO (2) When oil is completely drained, replace the
NOT use near open flame or excessive heat. drain plug and refill crankcase with six quarts of oil. If
The solvents flash point is 100F-138F filter is replaced, add one additional pint of oil. Refer to
(38C-59C). If you become dizzy while Lubrication Chart (figs. 3-1 through 3-6) for correct type
using cleaning solvent, immediately get fresh of oil. Wipe up any spills and dispose of used oil according
air and medical help. If solvent contacts eyes, to regulations.

4-121
TM 9-2330-356-14

TA099841

Figure 4-101. Right Side View of Engine.

WARNING 4-72. Engine Lubrication System

a. Oil Filter Replacement.

Dry cleaning solvent P-D-680 is toxic and
flammable. Always wear protective goggles (1) Place a suitable container under oil filter.
and gloves, and use only in a well-ventilated Use a wrench to turn filter (fig. 4-101) counterclockwise
area. Avoid contact with skin, eyes, and to remove. Remove filter and discard.
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat. (2) Clean filter mounting area.
The solvents flash point is 100F-138F
(38C-59C). If you become dizzy while (3) Coat gasket on new filter with clean oil.
Using cleaning solvent, immediately get fresh Install new filter by turning clockwise on mounting shaft.
air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and (4) Hand-tighten filter until gasket touches
mounting base. Tighten an additional -turn. DO NOT
get medical aid.
overtighten.

CAUTION (5) Add one additional pint of oil to crankcase.

Refer to Lubrication Chart (figs. 3-1 through 3-6) for
correct type of oil.
Do not get solvent on rubber parts. Damage
to parts may result. b. Oil Fill Cap Gasket Replacement. Remove engine
oil dipstick from engine. Inspect gasket in dipstick cap.
b. Cleaning. Periodically remove panel door Replace gasket if damaged.
(fig. 4-101) by unscrewing two retaining screws and 4-73. Engine Fuel System
thoroughly clean all visible components of crankcase,
cylinder head, and block. Use a stiff brush and dry cleaning a. Testing Electric Fuel Pumps on Equipment.
solvent (item 11, Appendix E). Wipe dry after cleaning.
(1) Perform operational test for each pump
c. Service. Check for any loose or missing bolts. individually. Each pump should pump at 6-7 psi as
Replace any bolts which are missing. registered on an accurate fuel pressure gage.

4-122
 TM 9-2330-356-14

(2) Connect fuel pressure gage to output port of (c) Refill tank with fresh fuel. Use No. 1
pump. diesel fuel (item 15, Appendix E) for operation below
32F and No. 2 diesel fuel (item 14, Appendix E) for
(3) Turn engine switch to RUN position. operation above 32F.
Pressure gage should register 6-7 psi.
c. Servicing Fuel Filters. Service primary fuel filter
(4) Replace defective pumps. and electric fuel pump filters after every 600 hours.
Service secondary fuel filter after every 3000 hours.
b. Servicing Fuel System (Fig. 4-102). Service filters sooner if loss of power is indicated. Service
first the fuel pump filters and then the primary and
secondary fibers.
CAUTION
(1) Electric Fuel Pump Filter (Fig. 4-103).
Drain plug on fuel filters can take only a (a) Place a suitable container under pump
limited amount of torque. Use two wrenches to collect any fuel that will spill from fuel pump.
in combination for breaking plugs loose and
for final tightening. (b) Use a wrench to turn bottom cover
(fig. 4-103) from bayonet pins. Twist cover off.
(1) Draining Water From Fuel System.

(a) Daily, drain water from both fuel filters.

Loosen but do not remove drain plug (fig. 4-102) at
bottom of filter. Allow fuel to drain until clear of water.
Tighten drain plug.

(b) If fuel system is badly contaminated with

water, drain water and fuel from tank (step (2)).

(2) Draining Fuel Tank.

(a) Place a suitable container under fuel

tank and remove drain plug (fig. 4-105). Drain fuel into a
suitable container.

(b) Flush tank with clean diesel fuel and

replace drain plug.
TA099843
Figure 4-103. Electric Fuel Pump Filter

WARNING

Dry cleaning solvent P-D-680 is toxic and

flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F
(38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh
air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and
get medical aid.

(c) Remove filter, magnet, and cover

gasket. Replace filter or clean in dry cleaning solvent
TA099842 (item 11, Appendix E) and blow dry. Discard gasket.
Figure 4-102. Location of Drain Plugs on Fuel Filters. Install magnet, new gasket, filter, and tighten cover.

4-123
TM 9-2330-356-14

(2) Primary and Secondary Fuel Filters e. Replacement of Fue[ Lines and Fittings. All fuel
(fig. 4-102). lines are hose assemblies. Simply remove line that needs
replacement, and replace with a new line assembly. See
(a) Place a suitable container under fuel figure 4-105 for location of all hose assemblies and
filters to collect any fuel. fittings.

(b) Remove drain plugs and drain fuel into f. Replacement of Fuel Tank.
containers.
(1) Drain fuel tank (b above).
(c) Remove bolt and lockwasher (fig. 4-102)
and remove filter. Dispose of contaminated filters. (2) Remove two upper fuel lines, elbows, and
bushings from top of fuel tank (fig. 4-105).
(d) Place new filter in position and tighten
bolt until gasket touches base. Then tighten bolt an (3) Remove four screws and washers that fasten
additional 1 to 2 turns. fuel tank straps. Disconnect ground cable.

d. Replacement of Electric Fuel Pumps. The fuel (4) Remove straps and fuel tank.
pumps are located at left rear side of engine and are
(5) Remove ground cable from tank.
mounted on the rear firewall (fig. 4-104).
(6) Replace fuel tank in reverse order of steps (2)
through (5).

(7) Fill fuel tank with proper fuel (para 2-10).

g. Bleeding Fuel System. Before initial start, or after

replacing fuel filters, fuel fines, fuel tank, or fuel pumps,
bleed the fuel system of air:

(1) Disconnect/loosen the fuel return line at top

of injector pump (fig. 4-105).

(2) Turn engine switch to RUN to energize the

electrical system and fuel pumps.

(3) Allow the fuel pumps to run until there are no

air bubbles in the fuel flowing from the fuel return line
fitting.

(4) Connect the fuel return line.

4-74. Air Cleaner

TA099844
Figure 4-104. Location of Fuel Pumps. a. Removal (Fig. 4-106).
(1) Removal. (1) Loosen clamp on engine air intake hose at air
cleaner and disconnect hose from air cleaner.
(a) Tag isconnect fuel lines from fuel
pump. Keep fuel lines clean. Plug lines to prevent (2) Open straps on air cleaner (fig. 4-106) and
contamination. remove air cleaner.
(b) Remove two self-locking nuts, b. Installation (Fig. 4-106).
lockwashers, and capscrews that mount fuel pump to
firewall. Remove fuel pump. (1) Install air intake hose on air cleaner outlet
and tighten clamp.
(c) Tag and disconnect electrical lead from
fuel pump. (2) Install air cleaner in mounting straps. Tighten
straps.
(2) Installation. Install fuel pump in reverse order
of steps (a) through (c). (3) Tighten hose clamp.

4-124
 TM 9-2330-356-14

TA099845
Figure 4-105. Fuel Tank and Lines.

4-75. Engine Throttle Linkage (Fig. 4-1 07)

WARNING

Dry cleaning solvent P-D-680 is toxic and

flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F
(38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh
air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and
get medical aid.

a. Service.
(1) Clean linkage, where accessible, with dry
cleaning solvent (item 11, Appendix E). Wipe dry with a
clean cloth.
TA099846
Figure 4-106. Engine Air Cleaner (2) Check throttle cable for adjustment.

4-125
TM 9-2330-356-14

TA502360
Figure 4-107. Throttle Linkage Connection at Engine.
b. Throttle Cable Adjustment. (4) Remove inside jam nut and pull cable through
shrouding.
NOTE
(5) Remove screw and handle from cable
Engine should be adjusted to low idle speed (fig. 4-108).
(900 rpm).
(6) Remove packing nut, jam nut, and washer.
(1) Remove engine panel door by loosening the
two retaining screws (fig. 4-101) and lifting door out. (7) Pull cable through channel of control panel.

(2) Start engine (para 2-10). (8) Cut and remove straps that support cable.

(9) Remove cable.

(3) To increase engine speed, loosen the throttle
jam nut on the outside of the panel and tighten the inside
jam nut (fig. 4-107).

(4) To decrease engine speed, loosen the inside

jam nut and tighten the outside jam nut.

(5) Shut off engine (para 2-10).

(6) Replace engine panel door.

c. Removal.

(1) Remove engine panel door by loosening the

two retaining screws (fig. 4-101) and lifting door out.

(2) Remove clevis pin and cotter pin (fig. 4-107)

from end of throttle cable. Disconnect throttle cable from
throttle rod.
TA099848
(3) Remove yoke and jam nut from end of Figure 4-108. Throttle Linkage Connection at
throttle cable. Control Panel.

4-126
 TM 9-2330-356-14

d. Installation. b. Governor Sensitivity Adjustment (No Engine Surge).

(1) Remove screw, handle, packing nut, one nut, (1) Start engine (para 2-10).
and washer from handle end of cable.
(2) Locate access hole cover on side of engine
(2) On opposite end remove one jam nut. blower housing and remove cover (fig. 4-101).

(3) Install cable through channel of control (3) Locate the governor arm assembly
panel. Replace the jam nut, packing nut, handle, and (fig. 4-109).
screw.
(4) For a coarse adjustment, relocate the spring
(4) Thread cable through hole in engine in the notches in the governor arm.
shrouding. Replace inside jam nut (fig. 4-107), but do not
tighten. (5) For a fine adjustment, insert a screwdriver
through the access hole to ratchet-type base of the
(5) Replace jam nut and yoke and attach yoke to governor arm. Turn the ratchet hub clockwise to decrease
throttle rod with clevis pin and cotter pin. sensitivity or counterclockwise to increase sensitivity.

(6) Start engine (para 2-10). (6) Adjust for maximum sensitivity without a
surging condition.
(7) Adjust engine speed to low idle (900 rpm)
(step b). (7) Stop engine (para 2-10).

(8) Shut off engine (para 2-10). 4-77. Engine Muffler/Exhaust

(9) Replace engine cover panel. a. Removal (Fig. 4-110).

(10) Replace straps. (1) Remove muffler shroud by removing ten

capscrews that secure shroud to panels (fig. 4-101).
4-76. Governor Assembly (Fig. 4-109)
(2) Loosen clamp (fig. 4-110) on the exhaust
a. Service. pipe by loosening a bolt and a nut.

(3) Remove two muffler clamps securing muffler

WARNING to mounting plate. Remove muffler.
Dry cleaning solvent P-D-680 is toxic and (4) Remove two capscrews and lockwashers from
flammable. Always wear protective goggles the exhaust pipe at the manifold. Remove exhaust pipe
and gloves, and use only in a well-ventilated adapter and gasket.
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO b. Installation (Fig. 4-110).
NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F (1) Install a new gasket between exhaust pipe and
(38C-59C). If you become dizzy while exhaust manifold. Secure exhaust pipe and adapter to
using cleaning solvent, immediately get fresh manifold with two capscrews and lockwashers.
air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and (2) Put exhaust pipe clamp over end of exhaust
get medical aid. pipe and insert muffler inlet into exhaust pipe. Do not
tighten clamp.
(1) Clean all accessible linkage with dry cleaning
solvent (item 11, Appendix E). Wipe dry with a clean cloth. (3) Replace muffler clamps and tighten.

(2) Periodically lubricate the ball joints (4) Tighten exhaust pipe clamp.
(fig. 4-109) with OE-10 oil (item 21, Appendix E).
Remove the engine panel door (fig. 4-101) to gain access (5) Replace muffler shroud, securing with ten
to the ball joints. capscrews (fig. 4-101).

4-127
TM 9-2330-356-14

TA504715
Figure 4-109. Governor Assembly.

4-128
 TM 9-2330-356-14

TA099850
Figure 4-110. Exhaust Pipe and Muffler.

4-78. Engine Alternator sion, resulting in serious injury or death to

personnel.
a. Removal of Alternator (Fig. 4-111). Alternator weighs approximately 25
pounds. Use caution when removing or in-
stalling the alternator to avoid injury to per-
WARNING sonnel or damage to components.

When performing electrical maintenance, (1) Disconnect negative, then positive cable from
ALWAYS disconnect intervehicular electrl- battery (fig. 4-37).
cal cable from semitrailer, and negative
battery cables at batteries. Failure to follow (2) Remove two screws and nuts from buss bar
this warning may create a spark and explo- cover. Remove cover.

4-129
TM 9-2330-356-14

TA502384
Figure 4-111. Alternator Installation (M967, M969, M970 Arrangement).

4-130
 TM 9-2330-356-14

(3) Unscrew pipe plug (fig. 4-111) directly below c. Replacement of Alternator Pulley (Fig. 4-111).
alternator from the intermediate housing.
(1) Remove alternator (19) (para 4-78).
(4) Remove bolt (3), lockwasher (2), and
flatwasher (1) securing alternator to adjusting bracket (4). (2) Clamp pulley in a soft jaw vise.

(5) Remove bolt (7), lockwasher (5), and nut (6), (3) Remove shoulder nut (20) from alternator
then remove the adjusting bracket (4). rotor shaft.

(6) Pull down on alternator to release tension on (4) Remove pulley (17) and key from rotor shaft.
alternator belt. Remove alternator belt from pulley.
(5) Install new pulley in reverse order.
(7) From underneath semitrailer, remove two
bolts (12 and 13), flatwashers (9), lockwashers (10), and (6) Install alternator (19) (step d).
nuts (11).
d. Installation of Alternator (Fig. 4-111).
(8) Remove ground cable (nearest) from
alternator. (1) Connect the positive cable to the positive
terminal on the alternator and the negative cable to the
(9) Pull alternator from mounting bracket (16). negative terminal on alternator (19).
Turn alternator and remove positive cable.
(2) Locate sliding bushing in one of ears on the
(10) Remove alternator. alternator. Move bushing so it is flush with the inside of
ear. This will give more clearance between the ears to
b. Adjustment of Alternator Drive Belt (Fig. 4-112). facilitate installation of alternator to the mounting
bracket (16, fig. 4-111).
(1) Loosen alternator adjusting bolt (3,
fig. 4-111) and mounting bolts (12 and 13) securing (3) Install bolt (13) and washer (9) into bushing
alternator to mounting bracket (16). on alternator.

(2) Insert a crowbar (fig. 4-112) between (4) Install alternator over ears of mounting
alternator and the pump housing. Be sure that lower end bracket (16). While doing this, have a second person
of bar will bear against the pump housing. Pull UP on the replace both bolts (12 and 13) through ears of alternator
bar and apply sufficient force to obtain proper belt and mounting bracket. Replace washers (10) and nuts (11).
tension. Proper belt tension is 1/8 to -inch deflection in Do not tighten.
the belt midway between the two pulleys.
(5) Replace alternator belt (18) over pulley (17).
(3) Tighten adjusting screw (3, fig. 4-111) and two
mounting bolts (12 and 13). (6) Replace adjusting bracket (4) on alternator
with capscrew (3), lockwasher (2), and flatwasher. Do not
tighten.

(7) Secure adjusting bracket (4) to bracket (8)

with capscrew (7), lockwasher (5), and nut (6).

(8) Replace buss bar box cover and secure it with

two capscrews and nuts.

(9) Adjust alternator belt (para 4-79).

(10) Connect positive and negative battery cables

to battery.

Replacement of Alternator Drive Belt (M967A1,

M969A1, and M970A1) (Figs. 4-113 through 4-122).

(1) Remove any broken belt fragments from the

TA099852 drive area. Remove the capscrews and lockwashers
Figure 4-112. Belt Deflection Adjustment. securing the flexible element drive ring (fig. 4-113).

4-131
TM 9-2330-356-14

TA222976 TA222978
Figure 4-113. Drive Ring Capscrew Removal. Figure 4-115. Pulling Drive Ring Back.

(2) Use two of the four drive ring capscrews as

jacking screws in the threaded holes around the drive ring.
Turn them in to force the ring out from the element. Be
certain to locate the jacking screws across from each other
(180). Turn the jacking screws in evenly to remove drive
ring (fig. 4-114).

(3) Pull the loosened drive ring back over the

rubber element (fig. 4-115).

(4) Compress the replacement belt and work it

behind the flexible rubber element (fig. 4-116).

(5) Using two suitable prying bars, pry the

flexible rubber element away from the engine and
maneuver the bottom of the belt down past the centerline
of the pump shaft (fig. 4-117).
TA222979
Figure 4-116. Compressing Alternator Drive Belt.

TA222977 TA222980
Figure 4-114. Jacking Screws Location. Figure 4-117. Prying Flexible Rubber Element.

4-132
 TM 9-2330-356-14

(6) After the belt has been maneuvered around

the flexible rubber element, pull it through the inside of
the drive ring (fig. 4-118).

TA222983
Figure 4-120. Alining Drive Ring.
TA222981
Figure 4-118. Pulling Belt Through Drive Ring.

(7) Aline the drive ring non-threaded mounting

holes with the threaded flywheel holes and engage the
capscrews with lockwashers finger tight. Do not fully
tighten at this time (fig. 4-120).

(8) Slide the drive ring back into position on the

flexible rubber element and pull the belt into the drive
sheave V groove (fig. 4-119).

TA222984
Figure 4-121. Checking Belt and Alternator Alinement.

TA222982
Figure 4-119. Positioning Belt on Drive Sheave.

(9) Check the arrangement of the drive belt for

alinement with the alternator (fig. 4-121).

(10) Retighten the drive ring capscrews with

lockwashers evenly in an alternating pattern. Tighten the
TA222985
capscrews with lockwashers to 10.5 lb.-ft. (126 lb.-in.)
(fig. 4-122). Figure 4-122. Torquing Drive Ring Capscrews.

4-133
TM 9-2330-356-14

4-79. Starter Motor b. Removal (Fig. 4-124).

a. Test, On Equipment (Fig. 4-123).

WARNING
(1) Make sure batteries are fully charged and
that all battery and starter cables are serviceable and When performing electrical maintenance,
properly installed. ALWAYS disconnect intervehicular electrical
cable from semitrailer, and negative battery
(2) Turn engine switch (2, fig. 2-9) to RUN. cables at batteries. Failure to follow this
warning may create a spark and explosion,
(3) Connect voltmeter as shown in figure 4-123, resulting in serious injury or death to
Test A. Turn starter switch (4, fig. 4-9) to START. A personnel.
voltage reading (12V) indicates circuits leading to starter
are okay. (1) Remove negative battery cable from battery
(fig. 4-37).
(4) Connect a voltmeter as shown in
figure 4-123, Test B. Turn starter switch (4, fig. 2-9) to (2) Starter removal is done from underneath the
START. vehicle on the left side of the engine.
(a) If no voltage is indicated, solenoid is (3) Remove starter solenoid protective bracket
defective. Replace solenoid (para 4-80). (1) by removing two retaining capscrews (2) and washers
(3). Remove five capscrews (4) from engine air shutter.
(b) If voltage is indicated, (12V) but starter After these screws are removed, the engine air shutter can
does not turn, starter is defective. Replace starter. be raised to get at top retaining bolt on starter.

(4) Remove hot lead No. 6 from large bottom

pole of solenoid and lead No. 74 from small pole on rear
side of solenoid.

(5) Remove capscrew (5), washer (6), capscrew

(7), external tooth lockwasher (8), and nut (9) from starter
rear support bracket (10). Remove rear starter bracket.

(6) Raise engine shutter (fig. 4-124) so you can

get at top retaining bolt on starter. Remove top capscrew
(11) and washer (12) using a 3/8-inch drive set, long
extension, universal joint, and a 9/16-inch universal
socket. Remove bottom capscrew (13) and washer (14),
then remove starter (15).

c. Installation.

WARNING

When performing electrical maintenance,

ALWAYS disconnect intervehicular electrical
cable on semitrailer, and negative battery
cables at batteries. Failure to follow this
warning may create a spark and explosion,
resulting in serious injury or death to
personnel.

(1) Before installing starter motor, check the

pinion clearance (fig. 4-124). Proper clearance is
important to ensure that starter engages.

(a) Press on solenoid core to shift the pinion

TA099853 into full mesh position, then measure the clearance
Figure 4-123. Testing Engine Starter. between the pinion and pinion stop.

4-134
 TM 9-2330-356-14

TA099854
Figure 4-124. Starter Removal.

4-135
TM 9-2330-356-14

(b) The clearance should be between (5) Remove linkage pin which connects solenoid
0.070-inch and 0.120-inch (as near to 0.070-inch as shaft to linkage (fig. 4-124).
possible).
(6) Remove two screws that fasten solenoid to
(c) Adjust the link screw on the end of the starter motor. Remove solenoid.
solenoid plunger for proper clearance.
b. Installation.
(2) Raise engine air shutter and position the
starter motor and shield on engine. Install top retaining (1) Position starter solenoid on starter motor and
capscrew (11) and washer (12) on starter. Using a 3/8-inch fasten with two screws.
drive set, long extension, universal joint, and a 9/16-inch
universal socket, install bottom starter capscrew (13) and (2) Connect starter linkage to solenoid using
washer (14). linkage pin.

(3) Secure starter support bracket to starter (3) Attach hot lead No. 6 to large bottom pole of
solenoid and lead No. 74 to small pole.
using capscrew (7), washer (8), and nut (9). Do not tighten.
(4) Replace starter solenoid protective shield.
(4) Using capscrew (5) and washer (6) secure Fasten with two capscrews and washers.
starter support bracket to engine. Tighten capscrew (7),
washer (8), and nut (9). (5) Connect negative battery cable to battery
(fig. 4-37).
(5) Attach leads No. 74 and No. 6 to starter
solenoid. 4-81. Buss Bar

(6) Replace the five capscrews (4) on engine air

shutter. WARNING

(7) Connect negative battery cable to battery When performing electrical maintenance,
(fig, 4-37). ALWAYS disconnect intervehicular electrical
cable from semitrailer, and negative battery
4-80. Starter Solenoid cables at batteries. Failure to follow this
warning may create a spark and explosion,
resulting in serious injury or death to
WARNING personnel.

When performing electrical maintenance, a. Replacing Buss Fuse (Fig. 4-125).

ALWAYS disconnect intervehicular electrical
cable from semitrailer, and negative battery (1) Disconnect negative battery cable from
cables at batteries. Failure to follow this battery (fig. 4-37).
warning may create a spark and explosion,
resulting in serious injury or death to (2) Remove buss bar cover (fig. 4-125) by
personnel. removing two capscrews and nuts.

(3) Remove buss bar fuse from its clips.

a. Removal.
(4) Install new fuse between clips.
(1) Remove negative battery cable from battery
(fig. 4-37). (5) Replace buss bar cover. Attach to firewall
with two capscrews and nuts.
(2) Starter solenoid removal must be done from
underneath the vehicle on the left side of the engine. (6) Reconnect negative battery cable to battery
(fig. 4-37).
(3) Remove starter solenoid protective bracket
(1) by removing the two retaining capscrews (2) and b. Removal.
washers (3).
(1) Perform steps (1) through (3) of paragraph a.
(4) Remove hot lead No. 6 from large bottom
pole of solenoid and lead No. 74 from small pole. (2) Disconnect all electrical leads from buss bar.

4-136
 TM 9-2330-356-14

(1) Remove engine panel door (fig. 4-101). Start

engine (para 2-10).

(2) While engine is operating, check for leaks;

especially at gaskets (14) between intake manifold (13) and
cylinder head, gasket (11) between air cleaner adapter and
manifold, and gasket (5) between the manifold heater
mounting plate (4) and the manifold.

(3) Drop oil from an oilcan or hold apiece of thin

paper on point suspected of leaking. If leak exists, oil will
be sucked in or paper will be sucked against leaking area.

(4) Shut off engine (para 2-10) and replace

engine panel door.

b. Removal.

TA502361 (1) Remove air cleaner hose from manifold and

Figure 4-125. Removal of Buss Bar. manifold heaters (para 4-20).

(3) Remove two capscrews (fig. 4-125), washers, (2) Remove two screws (1), lockwashers (2), and
and nuts securing each buss bar to firewall. insulator sleeves (3). Remove heater mounting plate (4)
and gasket (5).
(4) Remove buss bar assembly, washers, and
spacers. (3) Remove capscrew (6), washer (7), capscrew
(8), washer (9), air cleaner adapter (10), and gasket (11).
c. Installation.
(4) Remove four nuts (12), then remove intake
(1) Install washer on each capscrew (fig. 4-125). manifold (13) and two gaskets (14).

(5) Clean away any gasket material stuck to

(2) Insert capscrew through grommets on buss
manifold, heater mounting plate, air cleaner adapter, and
bar.
cylinder heads. Discard gaskets and insulator sleeves.
(3) Slide a washer and spacer onto each capscrew c. Repair. Remove manifold as given above and
and insert through fire wall. replace gaskets if leaks occur.
(4) Attach each buss bar to firewall with nuts. d. Installation.
(5) Connect all electrical leads to buss bar. (1) Install intake manifold (13) and new gaskets
(14) to cylinder heads and secure with four nuts (12).
(6) Install fuse into fuse clips. Tighten nuts to 13-15 lb.-ft.
(7) Replace buss bar cover. Secure with two (2) Install air cleaner adapter (10) and new gasket
capscrews, washers, and nuts. (11) to manifold, and secure with capscrews (6 and 8) and
washers (7 and 9).
(8) Reconnect negative battery cable to battery
(fig. 4-37). (3) Install heater mounting plate (4) and new
gasket (5) to manifold, and secure with two new insulator
4-82. Intake Manifold Assembly (Fig. 4-126) sleeves (3), two screws (1), and lockwashers (2).

a. Inspection, On Equipment (Fig. 4-126). (4) Install manifold heaters (para 4-20).

4-137
TM 9-2330-356-14

TA099856
Figure 4-126. Intake Manifold.

4-138
 TM 9-2330-356-14

Section XVIII. MAINTENANCE OF FILTER/SEPARATOR AND SUMP COMPONENTS

(M969, M969A1, M970, and M970A1)
4-83. Filter/Separator (Fig. 4-127) (10) Disassemble canister assembly as follows:
(a) Pull adapter (13) from canister (12).
WARNING
(b) Remove fuses (15) from canister and
discard.
Read and observe all safety precautions
listed in the Warning Summary before (c) Remove fuse clip (14).
performing maintenance on filter/separator.
Ensure that semitrailer is grounded to an (d) Remove two gaskets (16 and 17) from
approved (earth) ground and it is safe to adapter. Gasket (17) might remain in filter/separator;
proceed. Failure to follow this warning may remove it.
cause a spark to ignite, resulting in serious (11) Unscrew plastic retainers (18) from the
injury or death to personnel. element (19) guide pipes.

Removal of Elements and Fuses. (12) Slide elements (19) off guide pipes.
a.
b. Installation of Elements and Fuses.
NOTE (1) Start installation of elements (19, fig. 4-127)
Be sure all valves are closed. on the guide pipes farthest from the service port. Coat
O-ring of element with petrolatum (item 23, Appendix E).
Install elements on guide pipes.
(1) Place a suitable container under the manual
drain valve N (fig. 4-127). Open valve N and remove any (2) Install plastic retainers (18) and hand tighten
fluid from filter/separator. When thoroughly drained, only. Do not overtighten.
close drain valve.
(3) Reassemble canister assembly:
NOTE (a) Install two new gaskets (16 and 17) in
adapter (13). Gasket (16) will not go in flat.
Note location of lead seal wires for
installation. (b) Place adapter on bench and insert three
new Go-No-Go fuses (15). Push fuses all the way down
into holes.
(2) Cut two lead seal wires at top and bottom of
cover (4). (c) Place clip (14) on top of fuses.

(3) Remove 12 nuts (1), bolts (2), and washers (3) (d) Slide canister (12) over fuses (15) and
that fasten cover (4) to mounting flange. push into adapter.
(4) Put a canister assembly through the service
(4) Remove cover (4) by pulling straight out from
port with adapter end down toward bottom of tank. Turn
flange.
adapter end to the left and lift canister into position on the
upper guide rods farthest from service port. Slide canister
(5) Remove gasket (5) and discard. to the left until it fits into the outlet hole.
(6) Unscrew four wingnuts (6) and remove with (5) Raise end of canister assembly and install
washers (7 and 8). support (10) near end of canister.

(7) Remove retaining plate (9). (6) Install next canister on top guide rods,
followed by lower row starting with the farthest
(8) Starting with lower canister assembly installation and working toward service port.
(nearest to service port), remove the support (10), and pull
canister assembly (11) to the right until it drops down so it NOTE
can be removed through the service port. Hand tighten wingnuts. DO NOT use a
wrench.
(9) Remove the four remaining canister
assemblies in the same way; always remove lower canister (7) Replace canister retainer plate (9) and secure
assembly first. with four wingnuts (6) and washers (7 and 8).

4-139
TM 9-2330-356-14

TA502362
Figure 4-127. Exploded View of Filter/Separator.

4-140
 TM 9-2330-356-14

(8) Install new gasket (5). (d) Remove the eight capscrews and
washers that fasten the float assembly to the
(9) Replace cover (4). Secure with twelve bolts filter/separator. Remove float and automatic drain valve
(2), washers (3), and nuts (1). Ensure that four bolts with assembly.
holes in shaft are installed where lead seal wires will be
installed. (e) Remove and discard gasket.
(10) Install one lead seal wire through holes in top
pair of bolts (2) and one through holes in bottom pair. Put (f) Remove manual drain valve from the
wires through seals and crimp, using tool, Lead Seal Press, assembly.
NSN 5120-00-224-7592. Trim excess wire.
(2) Installation.
4-84. Sump Components
(a) Place a new gasket on flange of float
WARNING assembly.

Read and observe all safety precautions (b) Install float and automatic drain valve to
listed in the Warning Summary before per- filter/separator. Attach with eight capscrews and washers.
forming maintenance on sump components. Tighten securely.
Ensure that semitrailer is grounded to an ap-
proved (earth) ground and it is safe to pro- (c) Connect the tube line(s) to the float
ceed. Failure to follow this warning may assembly.
cause a spark to ignite, resulting in serious in-
jury or death to personnel.
b. Replacement of Manual Drain Valve.

a. Automatic Drain Valve and Float Assembly.

(1) Close valve M.
(1) Removal.
(2) Place a suitable container under the manual
(a) Close valve M. drain valve N (fig. 4-127). Open valve N and remove all
fluid from filter/separator.
(b) Place a suitable container under the
manual drain valve N (fig. 4-127). Open valve N and
(3) Unscrew manual drain valve from float
remove air fluid from filter/separator. When thoroughly
assembly. Be sure nipple does not come off with drain
drained, close valve N. valve.
NOTE
NOTE
DO NOT disconnect the tubes connecting the
float assembly to the automatic drain valve. Be sure manual drain valve is closed.

(c) Disconnect the tube coming from top of

filter/separator at the float assembly. Only the M970 and (4) Screw manual drain valve tightly onto nipple
M970A1 have a second tube to be disconnected. of float assembly.

Section XIX. MAINTENANCE OF DISPENSING EQUIPMENT

4-85. General ment. Ensure that semitrailer is grounded to

an approved (earth) ground and it is safe to
proceed. Failure to follow this warning may
WARNING cause a spark to ignite, resulting in serious in-
jury or death to personnel.
Read and observe all safety precautions
listed in the Warning Summary before per- a. Read and observe all safety precautions in the
forming maintenance on dispensing equip- Warning Summary.

4-141
TM 9-2330-356-14

b. Consider the location of the unit to be serviced,

and drain the affected valves and piping. CAUTION

c. Consider the size and weight of the unit to be Uneven tightening of nuts may cause gasket
removed and provide support. to pinch.

d. Loosen or remove any item necessary to allow (5) Install coupling bolts and tighten nuts finger
removal of the unit. In some instances when removing tight. Tighten the nuts uniformly until coupling halves are
valves, piping may have to be loosened at different places firmly togethermetal-to-metal. Tighten nuts to torque
to make it easy to remove valve and gaskets. specified.

e. When replacing O-rings, coat with petrolatum 4-86. Valves

(item 23, Appendix E) to facilitate installation.
a. General. Refer to the General Instructions in
f. Coat all male threaded pipe fittings with antiseize paragraph 4-85.
tape (item 27, Appendix E) before installation.
b. Gate Valves (Fig. 4-129).
g. Following the replacement of any unit, test for
leaks and correct if leaks are evident. (1) Removal. Remove connecting nuts, washers,
and bolts, or two nuts and bolts, from couplings. Remove
h. When installing split couplings and gaskets, couplings. Remove valve and gaskets.
follow procedure below:

(1) Lubricate complete gasket with petrolatum

(item 23, Appendix E).

(2) Slide gasket onto one pipe end. Ensure that

gasket lip does not overhang pipe end.

(3) Aline and bring the two pipe ends together

and slide gasket into position centered between the
grooves on each pipe end. No portion of gasket should
extend into groove on either pipe (fig. 4-128).

(4) Assemble the coupling, being sure edges of

coupling drop securely into grooves. Squeeze housing
tight with hands to further center the gasket and seat the
housing.

TA502383 TA099859
Figure 4-128. Installing Coupling Gasket. Figure 4-129. Typical Gate Valves and Couplings.

4-142
 TM 9-2330-356-14

NOT use near open flame or excessive heat.

WARNING
The solvents flash point is 100F-138F
(38C-59C). If you become dizzy while
Dry cleaning solvent P-D-680 is toxic and using cleaning solvent, immediately get fresh
ftammable. Always wear protective goggles air and medical help. If solvent contacts eyes,
and gloves, and use only in a well-ventilated immediately wash your eyes with water and
area. Avoid contact with skin, eyes, and get medical aid.
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F (2) Cleaning and Inspection. Clean with
(38C-59C). If you become dizzy while cleaning solvent (item 11, Appendix E). Inspect sealing
using cleaning solvent, immediately get fresh surfaces of valve for physical damage.
air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and (3) Installation. Install valve and attach with
get medical aid. sixteen washers, sixteen nuts, and eight studs. Tighten
nuts securely.
(2) Cleaning and Inspection. Clean with dry
d. Angle Valve and Check Valve (M969, M969A1,
cleaning solvent (item 11, Appendix E). Inspect gaskets
M970, and M970A1) (Fig. 4-131).
and valves.
(1) Removal.
(3) lnstallation. Install valves and new gaskets
and attach with bolts, washers, and nuts, or split couplings
(para 4-85). Tighten coupling nuts to 95-105 lb.-ft. (a) Remove coupling at rear of check valve.
Tighten valve mounting bolts to 25-35 lb.-ft.
(b) Remove four capscrews, washers, and
c. Butterfly Valve (fig. 4-130). nuts from bottom of angle valve.

(1) Removal. Remove sixteen nuts, sixteen

washers, and eight studes. Remove valve.

TA502363
Figure 4-130. Typical Butterfly Valve.

WARNING

Dry cleaning solvent P-D-680 is toxic and

flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated TA502364
area. Avoid contact with skin, eyes, and Figure 4-131. Angle Valve and Check Valve (M969,
clothes, and DO NOT breathe vapors. DO M969A1, M970, and M970A1).

4-143
TM 9-2330-356-14

(c) Remove angle valve and check valve as a The solvents flash point is 100F-138F
complete assembly. (38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh
(d) Separate check valve and angle valve on air and medical help. If solvent contacts eyes,
a bench by removing four capscrews, washers, and nuts. immediately wash your eyes with water and
get medical aid.

WARNING (2) Cleaning and Inspection. Clean with dry

cleaning solvent (item 11, Appendix E). Inspect gaskets
Dry cleaning solvent P-D-680 is toxic and and valves.
flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated (3) Installation. Install valve and new gaskets with
area. Avoid contact with skin, eyes, and sixteen capserews, washers, and nuts. Tighten nuts to
clothes, and DO NOT breathe vapors. DO 25-35 lb.-ft.
NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F
(38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh
air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and
get medical aid.

(2) Cleaning and Inspection. Clean with dry

cleaning solvent (item 11, Appendix E). Inspect gaskets
and valves.

(3) Installation.

(a) Assemble angle valve, new gasket, and

check valve assembly by securing both valves together with
four capscrews, washers, and nuts.

(b) Position angle valve and check valve

between manifold and pipe. Install new gasket, four
capscrews, washers, and nuts to secure angle valve to TA099862
manifold. Do not tighten capscrews.
Figure 4-132. Check Valve (M967, M967A1, M969,
and M969A1).
(c) Install coupling and gasket (para 4-85h).
Tighten coupling nuts to 57-63 lb.-ft. f. 4-Inch Control Valve (Bottom Loading)
(Figs. 4-134 and 4-135).
(d) Tighten capserews securing angle valve
to manifold to 25-35 lb.-ft. (1) Adjustment (to ensure that fuel shut-off closes).

e. Check Valve (M967, M967A1, M969, and M969A1) (a) Start with empty tank.
(Fig. 4-132) .
(b) Refer to flow diagram for either filtered
(1) Removal. Remove sixteen capscrews, self-load (fig. 2-34) or non-filtered bottom load
washers, and nuts. Remove valve and gaskets. (fig. 2-22).

(c) Install a 0-60 psi pressure gage in the

3/8-inch NPT port on underwing nozzle (fig. 4-133) for
WARNING
filtered self-load or non-filtered bottom load.
Dry cleaning solvent P-D-680 is toxic and (d) Connect underwing nozzle (for
flammable. Always wear protective goggles self-load) or storage facility hose to the bottom load
and gloves, and use only in a well-ventilated adapter (figs. 4-147 through 4-149).
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO (e) Remove plastic plug (fig. 4-134) from
NOT use near open flame or excessive heat. needle valve.

4-144
 TM 9-2330-356-14

(g) Start engine (para 2-10) and begin

loading (para 2-14a for self-load and para 2-13b for
non-filtered bottom load).

WARNING

DO NOT close needle valve completely. This

will prevent 4-inch control valve from closing
at anytime during bottom load operations.

(h) Close (clockwise) needle valve in -turn

increments. Observe change in pressure reading at each
step, until there is no change in pressure.
(i) At this point, open precheck valve D
(fig. 2-26).

TA099863
Figure 4-133. Installation of Pressure Gage.

(f) Using a 4-inch long screwdriver

(fig. 4-134), turn screwdriver counterclockwise 8-10 full
turns to open needle valve on 4-inch control valve.

TA099866
Figure 4-135. Location of 4-Inch Control Valve.
(j) Sound of control valve starting to close
should be heard in approximately 30 seconds. Full shut off
should be obtained in an additional 35 seconds.
(k) If full shut off is not obtained (sound of
liquid flow or whistle are indications) open (counterclock-
wise) needle valve in -turn increments until it does.
Then close precheck valve, allowing flow to resume.

NOTE
Closing needle valve increases closing
time.
Opening needle valve decreases closing
time.

(1) Repeat steps (h), (i), and (j), changing

TA099864 needle valve setting in -turn or less increments until the
Figure 4-134. Adjustment of Needle Valve. 3-5 second closing rate is obtained.

4-145
TM 9-2330-356-14

(m) Shut off engine (para 2-10). (d) Position control valve, and slide
coupling gaskets over valve ends (para 4-85). Install
(n) Replace plastic plug in needle valve. couplings.

(o) Remove gage from underwing nozzle (e) Connect the two nylon tubes (fig. 4-135)
and stow nozzle. at A and B.

(2) Removal. g. 3-inch Control Valve (Deadman Valve) (M970 and

M970A1).
(a) Disconnect the two nylon tubes from the
4-inch control valve at points A and B (fig. 4-135). (1) Adjustment.

(b) Remove the two nuts and bolts from the (a) Locate needle valve (fig. 4-137) and
two couplings (fig. 4-135) and remove the couplings. Slide remove plastic plug.
gaskets onto mating pipes and remove the control valve (b) Using a 4-inch-long screwdriver, close
assembly. needle valve (fig. 4-134) completely by turning adjusting
screw clockwise.
(c) Place control valve assembly on a clean
surface and remove tube elbow (1, fig. 4-136) from control (c) When closed, turn adjusting screw five
valve. turns counterclockwise to adjust valve to proper setting.
(d) Unscrew tee (3) from control valve and
remove tee (3), drain cock (2), and tube fitting (4) as an
assembly.

(e) Unscrew drain cock (5) from control

valve.

(3) Installation.

(a) Remove drain plug from new control

valve and install drain cock (5) (fig. 4-136).

(b) Install drain cock (2), tee (3), and tube

fitting (4) assembly onto control valve.

(c) Install tube elbow (1) onto control valve.

TA099868
Figure 4-137. Location of Needle Valve.

(2) Removal (Fig. 4-138).

(a) Disconnect and tag the five nylon tubes

from the control valve at points A through E.

(b) Loosen fitting (1) and elbow (2), and

remove copper tubing (3).

(c) Remove two nuts from each of two

TA099867 couplings (4 and 5) and remove the couplings.
Figure 4-136. Removal of Fittings From 4-Inch
(d) Slide the coupling gaskets onto the
Control Valve. control valve and remove the control valve assembly.

4-146
 TM 9-2330-356-14

TA502365
Figure 4-138. 3-Inch Control Valve Installation (M970 and M970A1).

4-147
TM 9-2330-356-14

(e) Place the control valve assembly on a (f) Position control valve between tubes
clean surface and remove elbow (6) from the control valve. and install couplings (para 4-85). Tighten nuts to
95-105 lb.-ft.
(f) Remove coupling gaskets.
(g) Replace elbow (2) and connect copper
(g) Loosen fittings (7) and (8) and remove tubing (3) between elbow (2) and fitting (1).
tube (9).

(h) Unscrew nipple (10). Remove valve (11), (h) Connect the five nylon tubes to the
and elbows (7 and 12) as an assembly. control valve at points A through E.

(i) Unscrew nipple (13). Remove tee (14), h. Emergency Valve (Fig. 4-139).
nipple (15), valve (16), tee (17), and hose fittings (8 and 18
through 20) as an assembly. (1) Removal.

(j) Unscrew elbow (2) and drain valve (21). (a) Loosen, but do not remove, two nuts
from U-bolt (fig. 4-139) on emergency valve lever and
(3) Installation (Fig. 4-138). disconnect emergency valve cable.
(a) Remove drain plug from new control
valve, and install drain cock (12).
CAUTION
(b) Install items (8) and (13 through 20) onto
the control valve as an assembly. Support large outlet tube before removing
coupling.
(c) Install items (7) and (10 through 12) onto
control valve as an assembly.
(b) Remove two nuts and bolts from
(d) Replace line (9) and inserts (22) between coupling and remove coupling. Slide gasket onto
fittings (7) and (8). Tighten fittings. emergency valve.

(e) Slide coupling gaskets over control valve (c) Remove eight nuts from studs securing
tubes. emergency valve to sump on tank.

TA502366
Figure 4-139. Emergency Valve.

4-148
 TM 9-2330-356-14

(d) Remove emergency valve, pipe, adapter, (2) Removal. Remove two nuts and bolts from
and gasket from tank sump. both couplings and remove couplings. Slide gaskets back
and remove valve. Unscrew the two nipples.
(e) R e m o v e c o u p l i n g g a s k e t f r o m
emergency valve.

(2) Cleaning and Inspection.

WARNING

Dry cleaning solvent P-D-680 is toxic and

flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F
(38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh
air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and
get medical aid.

(a) Clean valve with dry cleaning solvent

(item 11, Appendix E). TA099870
Figure 4-140. Pump Bypass Valve (M970 and M970A1).
(b) Replace gaskets. Inspect valve for
cracks, distortion, and wear.

(3) Installation. WARNING

(a) Slide coupling gasket onto emergency Dry cleaning solvent P-D-680 is toxic and
valve. flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated
NOTE area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
Be sure pipe is engaged with vent. NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F
(b) Install valve, pipe, adapter, and gasket to (38C-59C). If you become dizzy while
tank sump and attach eight nuts. Tighten nuts to using cleaning solvent, immediately get fresh
50-75 lb.-ft. air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and
(c) Slide gasket over joint and attach get medical aid.
coupling (para 4-85). Tighten nuts to 104-116 lb.-ft.

(d) Reconnect emergency valve cable to the (3) Cleaning and Inspection. Clean with dry
emergency valve lever. Tighten the two U-bolt nuts. cleaning solvent (item 11, Appendix E). Inspect coupling
Check for proper operation of emergency valve and cable gaskets, valve seat, and body.
adjustment (para 4-52).

Pump Bypass Valve (M970 and M970A1) (4) Installation. Screw nipples into valve and
(Fig. 4-140). tighten with a pipe wrench. Slide flange coupling gaskets
over nipples. Position valve and slide gaskets over joints
(1) Adjustment. The pump bypass valve is preset (para 4-85). Attach split couplings. Tighten nuts to
at 45 psi. No further adjustment is necessary. 95-105 lb.-ft.

4-149
TM 9-2330-356-14

4-87. Piping Strainer (Fig. 4-141)

a. Service.

WARNING

Dry cleaning solvent P-D-680 is toxic and

flammable. Always wear protective
goggles and gloves, and use only in a well-
ventilated area. Avoid contact with skin,
eyes, and clothes, and DO NOT breathe va-
pors. DO NOT use near open frame or ex-
cessive heat. The solvents flash point is
100F-138F (38C-59C). If you be-
come dizzy while using cleaning solvent,
immediately get fresh air and medical help.
If solvent contacts eyes, immediately wash TA099871
your eyes with water and get medical aid. Figure 4-141. Piping Strainer.
Compressed air used for drying or (2) Install strainer in tube, slide gasket over joint,
cleaning purposes must not exceed 30 psi and attach coupling. Tighten nuts to 104-116 lb.-ft.
(207 kPa). Wear protective clothing
(goggles and gloves) and use caution to (3) Install batteries (para 4-23).
avoid injury to personnel.
4-88. Recirculation Adapter (Fig. 4-1 42)

(1) Every three months (quarterly), remove a. Replacement of Gasket.

strainer. Clean strainer and inside of tube with dry
cleaning solvent (item 11, Appendix E). Use compressed (1) Remove eight self-locking nuts (1).
air to remove any other sediment.
(2) Remove adapter plate (2) and gasket (3).
(2) Inspect strainer for deterioration. Replace (3) Install new gasket (3) over eight studs.
strainer if it can no longer service the dispensing system.
(4) Replace adapter plate (2) and secure with
b. Removal. eight self-locking nuts (1).

(1) Remove batteries to avoid deterioration from

splashing fuel (para 4-23).

NOTE
A suitable container must be provided to
collect approximately 3 gallons of fluid that is
in pump housing and pipe.

(2) Remove the two nuts and bolts (fig. 4-141)

from split flange coupling and remove coupling. Collect
fluid in container.

(3) Remove coupling gasket, then pull strainer

from tube.

(4) Dispose of fluid in accordance with local SOP.

c. Installation. TA099872
Figure 4-142. Recirculation Adapter (M970
(1) Slide coupling gasket onto tube (para 4-85). and M970A1).

4-150
 TM 9-2330-356-14

b. Replacement of Adapter. (2) Installation.

(1) Remove six screws (4). (a) Replace quick-disconnect fitting on new
hose (M970 and M970A1 only).
(2) Remove adapter (5) and O-ring (6) by pulling
adapter from the adapter plate (2). (b) Attach new hose to elbow of hose reel
and tighten.
(3) Install O-ring (6) in groove on adapter. (c) Loosen hose reel lock and rewind hose
(para 2-11).
(4) Install adapter (5) into hole in adapter plate
and secure with six screws. (d) Install proper nozzle to hose (paras 3-14
through 3-16 and 4-97).
c. Replacing Dust Cap.
b. Replacement of 2-inch Hose (M970 and
(1) Remove the dust cap (7) from the adapter (5). M970A1).

(2) Release the spring clip at the adapter (5) and (1) Removal.
remove cable and dust cap (7).
(a) Remove underwing nozzle from hose
(3) Attach spring clip to the adapter (5) and (para 3-17).
install dust cap (7) on adapter. (b) Release hose reel lock (fig. 2-15) by
turning hand wheel counterclockwise. Completely
4-89. Hose Reel Hoses and Fittings
unwind hose. Make sure end of hose is accessible for
removing hose.
a. Replacement of 1-inch Hoses (M969 and
M969A1) and 1-inch Hose (M970 and M970A1).
WARNING
(1) Removal.
To avoid movement of hose reel by
NOTE accidental activation of hose real rewind
switch, tighten hose reel lock.
On M969 and M969A1, remove nozzle and
bushing reducer. (c) Lock hose reel in place by turning
handwheel clockwise until tight.
(a) Remove nozzle from end of hose
(d) Remove quick disconnect fitting from
(paras 4-14 through 4-16, and 4-97).
outlet end of hose.
(b) Release hose reel lock (figs. 2-14 and (e) Disassemble breakaway fitting into two
2-15) by turning hand wheel counterclockwise. pieces. Unscrew 45 elbow from hose fitting.
Completely unwind hose. Make sure you can reach the
end of the hose. (f) To disassemble further, remove
capscrews which secure the flange adapter (fig. 4-143) to
the hose reel outlet elbow. Remove elbow, breakaway
WARNING fitting, and adapter assembly. Place assembly in vise and
remove adapter flange and elbow from the breakaway
To avoid movement of hose reel by fitting.
accidental activation of hose reel rewind
switch, tighten hose reel lock. (2) Installation.

(a) Replace quick-disconnect fitting on new

(c) Lock hose reel in place by turning hand hose.
wheel clockwise until tight.
(b) Assemble breakaway fitting half and
(d) Unscrew hose fitting from elbow on hose flange adapter.
reel.
(c) Replace O-ring in groove of flange
(e) Remove quick-disconnect fitting from adapter and install assembly onto hose reel outlet elbow.
other end of hose (M970 and M970A1 only). Secure with four capscrews.

4-151
TM 9-2330-356-14

WARNING

With hose pulled from hose reel, the reel is

under spring tension. Be careful not to
release hose reel when removing hoses.
Personal injury could result.

(f) Disconnect hoses from elbows on the

hose reel and remove (fig. 4-144).

TA099873
Figure 4-143. 45 Elbow and Breakaway Fitting
Replacement.

(d) Attach 45 elbow and breakaway fitting

half to new hose.

(e) Assemble breakaway fitting (para 3-13).

(f) Loosen hose reel lock and rewind hose

(para 2-11).

(g) Install underwiring nozzle onto hose

(para 3-17).

c. Replacement of Hose on Deadman Hose Reel (M970

and M970A1). TA099874
Figure 4-144. Installation of Hoses to Deadman
(1) Removal. Hose Reel.

(a) Pull hose reel out far enough to remove (2) Installation.
deadman control from hoses. (a) Thread red hose through opening in
handle guard (fig. 4-145) and attach to OUT port of valve
(b) Remove the two screws and nuts on the assembly. Attach green hose to IN port of valve assembly.
deadman control to free the valve assembly (fig. 4-145).
(b) Replace valve assembly in handle guard
(c) Disconnect the two hoses from the valve of deadman control. Secure with two screws and nuts.
assembly.
(c) On green hose, replace the hose ball
(d) Remove the hose ball stop from hose by stop about 12-inches from the deadman control.
removing the two screws securing the two halves together.
(d) Thread the two hoses through opening
in hose roller assembly (fig. 4-144).
NOTE
Do not unwind hose reel fully. Hose reel may (e) Attach green hose to outside elbow
not release to rewind. (fig. 4-144) on hose reel and attach red hose to inside
elbow.

(e) Pull remaining hoses from hose reel. (f) Pull hoses to release latch on hose reel
Make sure you can reach the ends of the hoses. and rewind the hoses.

4-152
 TM 9-2330-356-14

(2) Use figures 4-147 through 4-149 as guides to

which valves, couplings, etc. must be removed in order to
remove the piping.

(3) Tag and disconnect any nylon tubing from the

b. Installation.

(1) Use figures 4-147 through 4-149 as guides to

(2) Refer to paragraph 4-85 for installation of

couplings.

4-92. Control Tubing

a. Precheck Circuit (M970 and M970A1)

(Fig. 4-150). The circuit is used to check the float valve for
TA099875 proper operation (para 2-11) during bottom load
Figure 4-145. Deadman Control. operations. The circuit includes the precheck valve, the
float valve, and all necessary tubing and fittings
4-90. Centrifugal Pump (fig. 4-150).
a. Lubrication. Lubricate the intermediate housing (1) Precheck Valve.
bearing weekly. Refer to figures 3-1 through 3-6 for
lubrication instructions and correct lubricant. (a) In the open position, this valve allows
fluid from the inlet of the 4-inch control valve to reach the
b. Priming. Whenever pump has lost its prime, float valve at port X (fig. 4-150A).
remove fill plug (fig. 4-146) and fill pump housing to
bottom of fill port with the type of fuel being transported (b) The fluid raises a float in the float valve
in the semitrailer tank. and shuts off fluid flow through port Y (fig. 4-150B).

(c) With flow shut off, the pressure in the

line to port Y is equalized. A spring in the 4-inch control
valve then closes the 4-inch control valve and stops bottom
load operations.

(2) Float Valve.

(a) This valve automatically closes the

4-inch control valve when fuel level inside the tank rises to
a predetermined level during bottom load operation.

(b) With precheck valve in the closed

position, fluid rises in the tank until it reaches the float
valve (fig. 4-150C). There it enters float valve and raises
the float, which shuts off the fluid entering in port Y of the
float valve.

(c) With flow shut off at port Y, the

pressure in the line to port Y is equalized. A spring in the
TA099876 4-inch control valve then closes the 4-inch control valve
Figure 4-146. Priming Centrifugal Pump. and stops the bottom load operation.
4-91. Dispensing Piping b. Precheck and Load/Unload Circuit (M967,
M967A1, M969, and M969A1) (Fig. 4-151). This circuit is
a. Removal. used to check the float valve for proper operation
(para 2-11) during bottom load operations. In addition, a
(1) Review General Instructions before remov- load/unload valve is added to the circuit to shut off 4-inch
ing any piping (para 4-85). control valve during bulk delivery operations. The circuit

4-153
 TM 9-2330-356-14

includes a precheck valve, load/unload valve, and float (b) The fluid raises a float in the float valve
valve (fig. 4-151). which shuts off fluid flow through port Y (load/unload
valve must be in a load position).
(1) Precheck Valve.
(c) With flow shut off, the pressure in the
(a) In the open position, this valve allows line to port Y is equalized (fig. 4- 151B). A spring in the
fluid from the inlet of the 4-inch control valve to reach the 4-inch control valve then closes the 4-inch control valve
float valve at port X (fig. 4-151A). and stops bottom load operation.

TA502367
Figure 4-147. Dispensing System (M967 and M967A1).

4-154
TM 9-2330-356-14
TA502368
figure 4-148. dispensing system (m969 and
4-155
 TM 9-2330-356-14
TA099879
figure 4-149. dispensing system (m970 and m970a1).
4-156
 TM 9-2330-356-14

TA099880

Figure 4-150. Precheck Flow Diagram (M970 and M970A1).

4-157
 TM 9-2330-356-14

TA099881
Figure 4-151. Precheck and Load/Unload Flow Diagram (M967, M967A1, M969, and M969A1).

4-158
 TM 9-2330-356-14

(2) Float Valve. secondary air reservoir to operate a normally closed pilot
valve A on the 3-inch control valve.
(a) This valve automatically closes the
4-inch control valve when fuel level inside tank rises to a (3) When the normally closed pilot valve A is
predetermined level during bottom load operation. closed, fuel from the inlet side of the 3-inch control passes
through a needle valve and into the 3-inch control valve
(b) With precheck valve in the closed spring chamber. It also passes through normally open pilot
position, fluid rises in the tank until it reaches the float valves B and C on its way to the manifold.
valve (fig. 4-151C).
(4) Fuel also flows through the 3-inch control to
(c) There it enters float valve and raises the the 2-inch hose reel.
float which shuts off the fluid entering in port Y of the
float valve (load/unload valve must be in load position).
(5) As it enters the hose reels, fuel is bled off
through a pilot line, through the check valve portion of
(d) With flow shut off at port Y the pressure deadman release valve, to the normally-open pilot valve
in the line to port Y is equalized. A spring in the 4-inch B.
control valve then closes the 4-inch control valve and stops
the bottom load operation.
(6) The fuel pressure closes pilot valve B,
creating pressure in the spring chamber of the 3-inch
(3) Load/Unload Valve.
control valve. The additional pressure created on the
valve poppet of the 3-inch control valve closes the valve,
(a) Unlike the M970 and M970A1, the stopping flow to the underwing nozzle.
M967, M967A1, M969, and M969A1 do not provide a
means to manually shut down flow to the 4-inch control
valve during bulk delivery operations. (7) To open the control valve, the trigger on the
deadman control is squeezed, and air from the secondary
air reservoir is directed to the normally-closed pilot valve
(b) During these operations, fuel exiting the
A to open the pilot valve.
pump will follow two paths; one to either the piping
control or the filter/separator (dependent on operation)
and the other to the 4-inch control valve. (8) Once Valve A is open, the pressure in the
spring chamber of the 3-inch control valve is relieved and
(c) When the fuel reaches the 4-inch the control valve opens.
control valve inlet, the valve opens and allows fuel to
follow a path back to the pump. Consequently, the pump (9) When the water level in the filter/separator
actually recirculates the fuel in the piping system. sump is high enough to raise the float in the automatic
Therefore, when performing bulk delivery operations, the drain valve, pilot pressure is sent through the pilot line
load/unload valve is switched to the unload position. This from the automatic drain valve to the pilot valve C.
closes the load/unload valve and disrupts the flow in the
line to port Y on the float valve before it reaches the float (10) The pilot valve C closes, creating pressure in
(fig. 4-151D). the spring chamber of the 3-inch control valve.

(d) Because the load/unload valve is

(11) The additional pressure created on the valve
connected in series in the line to port Y, when precheck
poppet of the 3-inch control valve closes the valve,
operation or loading operations are performed, the
stopping flow to the underwing nozzle.
load/unload valve must be in the load (open) position
(fig. 4-151A and 4-151B).
(12) When water is drained from the
c. Deadman Control Circuit (M970 and M970A1) filter/separator, the float lowers and shuts off the pressure
(Fig. 4-152). to the pilot valve C. Pilot valve C opens and flow through
the 3-inch control valve continues.
(1) When the underwing nozzle is used in
conjunction with the 2-inch hose reel, the deadman d. Removal of Control Tubing.
control is used to control the fuel flow through the
underwing nozzle. (1) General. The general arrangement of the
control tubing is shown in figures 4-153 through 4-155. The
(2) The deadman control S (fig. 4-152) is a control tubing is nylon and is fastened in various locations
hand-held control which uses air pressure from the with straps.

4-159
TM 9-2330-356-14
TA099882
figure 4-152. deadman control system schematic (m970 and m970a1
4-160
 TM 9-2330-356-14

TA098883
Figure 4-153. Precheck Circuit and Load/UnIoad Circuit Tubing and Fittings (M967, M967A1, M969, and M969A1).

TA099884
Figure 4-154. Precheck Circuit Tubing and Fittings (M970 and M970A1).

4-161
TM 9-2330-356-14

TA099885
Figure 4-155. Deadman Control Tubing and Fittings (M970 and M970A1).

(2) Replacement of Nylon Tubing. (c) Remove straps, if necessary, and remove
tubing.
(a) Wherever possible drain control tubing
by opening drain cocks (fig. 2-25). NOTE
Tubing is stocked in bulk lengths.
(b) Disconnect tubing from fitting and
remove insert, compression sleeve, and nut on both ends (d) Measure original tubing and cut new
of tubing. tubing about six inches longer to allow for trimming.

4-162
 TM 9-2330-356-14

(e) Trim ends of tubing to get a smooth,

square cut. Slide tubing nut onto the end of tube, install
compression sleeve over end of tube, and install tubing
insert. Connect tubing to adapter fitting and tighten
tubing nut securely. Repeat procedure on other end of
tubing.

(f) Secure tubing with straps where needed.

e. Control Tubing Fittings. Use antiseize tape

(item 28, Appendix E) on all male threads. Take care not
to let any of the tape get into the system.

4-93. Precheck and/or Load/Unload Valve

(Fig. 4-156)

a. Removal.

(1) Remove the screw holding the handle to the

valve stem.

(2) Remove handle.

(3) Loosen and remove the nut and washer

securing valve to control panel plate.

(4) Remove valve from rear of plate.

TA099886
(5) Tag and disconnect the two nylon tubes from Figure 4-156. Precheck and/or Load/Unload Valve
the elbows at the valve. Installation.

4-94. Deadman Release Valve (Fig 4-157)

(6) Remove two elbows from valve.
a. Removal.
b. Installation.
(1) Tag and disconnect the two nylon tubes from
(1) If new valve is being installed, remove handle, the tube elbows by unscrewing tube nuts.
nut, and washer.
(2) Loosen and remove the top nut from valve.
(2) Replace elbows in valve by turning elbows
until tight. Elbows must be positioned to the rear of valve. (3) Remove valve from bracket.

(3) Connect the two nylon tubes to the elbows. (4) Remove two tube elbows from valve body.
Be sure notch in threaded portion of valve is facing down.
b. Installation.
(4) Position valve through hole in panel. (1) Replace tube elbows onto valve.

(5) Replace washer and nut to secure valve to (2) Position valve in bracket and secure with top
plate. nut.

(6) Replace handle on valve stem and secure with (3) Insert the two nylon tubes into the two tube
screw. elbows. Screw tube nuts onto elbow securely.

4-163
TM 9-2330-356-14

TA099887 TA099889
Figure 4-157. Deadman Release Valve. Figure 4-158. Meter Inlet Pressure Gage.

4-95. Meter Inlet Pressure Gage (Fig. 4-158) 4-96. Static Reel (Fig. 4-159)

a. Removal.
a. Removal.
(1) Remove two capscrews, four washers, and
(1) Disconnect the nylon tube from tube fitting. two self-locking nuts that secure static reel to cabinet.

(2) Remove static reel from cabinet.

(2) Remove two nuts that secure retaining plates
to rear of gage and remove plates. Then remove gage. b. Installation.

(3) Remove tee and drain cock assembly from (1) Place static reel in cabinet and position
rear of gage. mounting holes.

(2) Install two capscrews, four washers, and two

b. Installation. Reverse instructions in step a. self-locking nuts.

4-164
 TM 9-2330-356-14

(b) Loosen hose clamp (1) and slide off hose

and hood as a unit.

(c) Loosen hose clamps (2) and (4), and

remove hose (3) and pipe (5).

(d) Loosen clamp (8) and remove plug (9).

(2) Installation.

(a) Reverse instructions in step (1).

b. Replacement of Piping.

(1) Removal.

(a) Remove coupling (10) from coupling

(11).

(b) Remove two nuts and bolts from coupler

(12) and remove coupler.

(c) Provide support for pipe assembly (16) so

it will not fall.

(d) Remove four nuts (13), four washers

Figure 4-159. Static Reel. (14), and two U-bolts (15). Remove pipe assembly (16).

c. Replacement of Electrical Clip. Remove screw and (e) Remove coupling (11) from pipe.
nut that attaches clip to cable, then remove clip. Remove
screw and nut from new clip and replace securing cable (f) Remove eight capscrews (17) and nuts
between head of screw and clip. (18).
4-97. Vehicle Nozzle (M969 and M969A1)
(g) Remove vent (19) and gasket (20).
a. Removal.
(2) Installation. Install pipe in reverse order of
(1) Pull hose reel hose out far enough to work on removal steps (a) through (g). When installing coupling
nozzle easily. (12), refer to paragraph 4-85.

(2) Unscrew nozzle from end of hose. c. Replacement of Ground Receptacle.

(3) If reducer is removed with nozzle, unscrew (1) Removal.

bushing and screw back into hose.
(a) Remove ground wire from tool box by
b. Installation. Screw nozzle into reducer bushing on removing screw and nut.
end of hose. Tighten securely. Rewind hose reel hose
(para 2-11). (b) Remove two screws (21, fig. 4-160) and
nuts (22) and remove receptacle (23).
4-98. Vapor Recovery Piping (Fig. 4-160)

a. Replacement of Vapor Recovery Hood and Hose. (c) If bracket (24) is to be removed, remove
two capscrews (25) and nuts (26), and remove bracket (24).
(1) Removal.
(2) Installation. Install ground receptacle by
(a) Loosen clamp (6) and remove hood (7). reversing steps (a) through (c).

4-165
TM 9-2330-356-14

Figure 4-160. Vapor Recovery Piping.

Section XX. DRAINING AND PURGING OF TANK INTERIOR

4-99. General proper draining, purging, and cleaning meth-
ods.
NOTE
a. Removal of combustible vapors and liquids
A thorough reading of FM 10-20 and requires a coordinated effort of properly skilled safety and
TB 43-0212 is essential for understanding maintenance personnel. This maintenance procedure is to

4-166
 TM 9-2330-356-14

be performed by authorized unit or direct support

CAUTION
personnel with an MOS of 77F or equivalent.
Meters should be air dried thoroughly to
b. There are several methods available to eliminate eliminate rusting of internal moving parts.
combustibles from fuel tankers. The primary method is by
use of a purging chemical. Using a chemical to purge saves
time, labor, and material compared to other methods. It f. Completely drain tank intetior, all piping, pump,
greatly reduces the possibility of a combustible vapor meters, and filter/separator. Remove all accessory items,
buildup after the purging procedure has been completed such as gages and floats, which might entrap fuel. Drain
and after the vapor test readings show a safe level. the equipment that has been removed. Wipe dry all
connections. Cloths or mops used are to be washed, dried,
and stored, or disposed of safely.
c. Alternate methods include steam, forced air, and
oil purge.
4-101. Purging Tank
d. The methods described here will be chemical,
steam. and forced air. WARNING

e. If the semitrailer is being shipped after draining Should an emergency arise requiring entry
and purging, refer to Chapter 4, Section XXI for into a tank which is not vapor-free, or which
supplemental instructions. has an oxygen content less than
19.5 percent, personnel who enter the tank
4-100. Draining Tank shall have an attached lifeline and wear
protective respiratory equipment In the
form of either a self-contained breathing
apparatus or a full facepiece mask with a
WARNING
pressure supply of respirable air. Another
person, also provided with respiratory
Discontinue all operations if an electrical equipment, shall be stationed at the
storm Is threatening or In progress. Open manhole opening and remain there to
flames or other sources of ignition, such as watch personnel In the tank and summon
welding and cutting torches and ordinary assistance if a rescue operation becomes
electrical equipment, shall not be introduced necessary. Personnel should not enter a
in areas where flammable vapors may be tank which is in the explosive range.
present. The tank being drained and purged
shall be statically grounded prior to, and All vapor-freeing work by any method
during, all operations. should be carried on outdoors, remote
from vehicles and other known sources of
ignition, and the tank unit must be
a. Before any purging is started, semitrailer tank stationed where flammable vapors will not
and piping must be drained into suitable containers, or an blow or drift indoors. Failure to follow this
oil/water separator. warning may result in serious injury or
death to personnel.
b. Select a level area 100-feet from any building, Combustible vapor testing must be
source of ignition, or sewer system. Position semitrailer so
conducted as prescribed In this manual
that the tank sump is in the lowest position. and current field manuals and technical
bulletins. Vapor testing should not be
c. Have sufficient fire extinguishers available, conducted during steam cleaning since
placed 50-feet upwind, and manned by qualified excess moisture or lack of oxygen may
personnel. cause false readings.

d. Static ground the semitrailer to an approved Do not wear wool, nylon, silk, rayon, or other
(earth) ground. clothing having a tendeny to generate static electricity.

e. Place conductive metal or galvanized containers b. Wear clean cotton clothing with no metal buttons,
under all drain points. Ground containers to tank and to zippers, or fasteners. Remove all contents from pockets.
tanks common ground. Grounding connections shall be
made to clean, unpainted surfaces. c. Wear rubber boots and rubber gloves.

4-167
TM 9-2330-356-14

d. Use cotton waste for cleaning purposes; other covering as much area as possible, especially near the
material may generate static electricity. bottom and around baffles. Remove air lines and drain
solution from tank at all valves and drain points.
e. Required Materials.
(7) Fill tank with cold water and allow to
(1) Adequate source of water with a large overflow for 5 minutes or until water is clear. Drain tank
diameter hose long enough to reach the semitrailer. completely at all valves and drain points.

(2) Compressed air source and air hoses of (8) Conduct a combustible vapor test to
sufficient length to reach bottom of semitrailer tank. determine if tank is safe to repair, clean, paint, store,
change material, or ship. Take reading in several areas of
(3) Sufficient quantity of gas tank purger the tank. If test reading indicates tank is not safe, repeat
chemical obtainable through local procurement. Purging step (7), until a safe reading is obtained.
chemical No 913, Product-Sol Inc., 2010 Cole Avenue,
Birmingham, Michigan 48008 is the only known source g. PurgingSteam Method.
available to date. Purging chemical can be procured at a
cost of approximately $70.00 per 5 gallons, or $420.00 per (1) This methods is an alternate to the chemical
55 gallons, plus shipping cost. method, It is effective for the removal of high viscosity
petroleum products. Low pressure steam is injected into
(4) Combustible gas indicator set (NSN 6665-00- the tank for a period of time to bring the temperature of
664-4650 or NSN 6665-00-292-9945). The equipment is the tank to 76C (170F). Prior to introducing steam, the
listed as a Common Table of Allowance (CTA) item in SB metallic connection on the discharge end of the steam
700-20 and is line item number E57351. hose must be bonded to the tank shell and the tank must
be grounded.
(5) Entry into a tank which is not vapor-free or
which has an oxygen content less than 19.5% require the (2) After draining tank, ensure that all valves and
following: Protective respiratory equipment; lifeline; drain points remain open.
approved explosion-proof extension light or flashlight;
steam or air-operated venturi-type air mover or a fan-type (3) Introduce steam through manhole and baffle
blower with an air duct. plate opening in sufficient volume to raise the
temperature of the tank to 76C (170F). Close manhole
f. Purging-Chemical Method. fill cover to the extent steam line will permit.

(1) After draining tank, close or seal all valves

and drain points. CAUTION

(2) Fill tank with cold water and allow to Ensure that steam does not come in contact
overflow for five minutes or until all traces of flammable with electrical wiring and other components.
material are removed. Drain tank completely. The heat of steam can damage the painted
surface of the tar, valve seats, gaskets, and
(3) Close or seal all valves and drain points. diaphragms, and can weaken fusible plugs.

(4) Steam the tank for at least three hours. Turn

CAUTION steam source off.

Insufficient amount of chemical will result In

an incomplete purging. Once purging has CAUTION
begun, do not stop until process Is complete.
After purging by steam method, leave tank
(4) Add to tank 40-fluid ounces of the valves and drain points open during
chloro-carbon base purging chemical for each 100-gallon cool-down to prevent vacuum collapse of
capacity. A 5000 gallon tank will take approximately tank.
17 gallons of purging chemical.
(5) Leave an valves and drain points open until
(5) Fill tank to top with water. Do not overflow. tank is fully cooled, at least one hour.

(6) Insert air line through manhole and vent cap (6) Measure explosive vapor level. Take readings
openings and agitate solution with 3-5 psi of air for in several areas of the tank. Reading should be 20% lower
40 minutes. Frequently move air hoses around in tank, explosive level (LEL) or less. If LEL is greater than 20%,

4-168
 TM 9-2330-356-14

repeat steam cleaning for one hour. Continue steaming 4-102. Inspecting and Cleaning Tank Interior
until 20% LEL or less is obtained.
a. Inspection.
(7) After the tank has been freed of combustible
vapors, it is ready to repair, clean, paint, store, change WARNING
material, or ship.
Explosive meter check must be made before
h. Purging-Forced Air.
entering tank. Air personnel required to be
inside of tank must be equipped with fresh air
(1) Blower/air supply to be used with this
respirators, lifelines, rubber boots, and
procedure shall bean explosion-proof blower conforming
rubber gloves. An observer must be
to MIL-B-7619 or MIL-H-27507. If these blowers are not
stationed at the manhole opening so that
available, local safety personnel may authorize the use of
assistance may be summoned in the event of
another type blower.
an emergency.
(2) After draining tank, leave all valves and drain
points open, and grounded drain containers in place to (1) Remove manhole lid and enter tank. An
catch fuel during the purging operation. This is to explosion-proof light, flashlight, or electric lantern with
facilitate maximum air circulation. lens approved for use in hazardous areas must be used for
inspecting.
(3) Place blower/air supply SO-feet upwind of
(2) Inspect for sediment, solid deposits, or
semitrailer. Ground the blower to the static ground and
foreign matter of any kind. Inspect for corrosion and signs
connect duct to outlet side of blower.
of bad welds.
(4) Start blower BEFORE inserting duct into b. Cleaning Interior.
manhole opening. This will prevent fuel vapors from
entering duct and going into blower.
CAUTION
(5) Ground duct to the vehicle.
Metal tools, steel wool, steel brushes, or any
(6) Install duct in manhole. Secure with tape or abrasive cleaning powders must not be used
tie to semitrailer. to clean tank interiors. Their use would
destroy the thin oxidation film.
(7) Purge tank for two hours. During purging
operation, observe that air is being expelled at all valves (1) General. Stainless steel obtains its corrosion
and drain points. Trapped fuel may prevent air from being resistance from a thin film of oxidation that forms on the
circulated through all valves and drains. In the event air is surface when exposed to air. Care must be taken not to
not coming out of a valve or drain, temporarily close all damage this film.
other valves and drains and observe if trapped fuel is
expelled. Reopen valves and drains. (2) Cleaning. Use a lint-free rag (item 24,
Appendix E) to wipe off any sediment or foreign matter of
(8) Remove duct from manhole opening. any kind that may adhere to the inside of the tank. A
bristle brush can be used to remove solid deposits. Mild
(9) Shut off air supply. Wait 10 minutes. household powder or soap may be used for removal of
heavy residue.
(10) Measure explosive vapor level of tank. Take
readings in several areas of the tank. Reading should be
20% LEL or less. If reading is above 20% LEL, resume WARNING
purging operation following instruct ions above.
Compressed air used for drying or cleaning
(11) Purge for one hour AFTER a safe reading is purposes must not exceed 30 psi (207 kPa).
obtained. Wear protective clothing (goggles and
gloves) and use caution to avoid injury to
(12) Remove duct from manhole opening personnel.
BEFORE shutting off blower.
(3) Rinsing and Drying. Rinse entire interior with
(13) Close all valves and drains. Leave manhole warm water. Rinse off all soap with warm water. Dry
cover open. Tank is now ready to repair, clean, paint, store, entire interior thoroughly. Compressed air or centrifugal
change material, or ship. blowers maybe used to speed up drying.

4-169
TM 9-2330-356-14

4-103. Flushing b. Place suitable containers at a convenient

location near the hose reel compartment. Following the
operating instructions in Chapter 2, discharge about
WARNING 80 gallons through each hose reel (M969, M969A1, M970,
and M970A1). After evacuating the hoses, discharge the
remaining fuel through the bulk delivery hose. Shut off
All pumping procedures must be done engine.
outside.
c. Place suitable container under drain valve at
bottom of filter/separator. Open valve to drain remaining
a. Remove all cleaning materials and equipment fuel. Remove filter elements and replace with new ones
from the inside of the tank. Close manhole cover. Close (para 4-83).
all valves and drain points. Put 200-300 gallons of the type
fuel to be hauled in the tank. d. Dispose of the purging fuel per Command SOP.

Section XXI. PREPARATION FOR STORAGE OR SHIPMENT

4-104. General b. Items should be ready for use within the time
factors determined by the directing authority.
a. This section contains requirements and
procedures for administrative storage of equipment that is c. During the storage period appropriate
issued to and in use by Army activities worldwide. maintenance records will be kept.

4-106. Preparation of Equipment for Administrative

b. The requirements specified herein are necessary Storage
to maintain the equipment in administrative storage in
such a way as to achieve the maximum readiness a. Storage Site.
condition.
(1) Select the best available site for
c. Equipment that is placed in administrative administrative storage. Separate stored equipment from
storage should be capable of being readied to perform its equipment in use. Conspicuously mark the area
mission within a 24-hour period, or as otherwise Administrative Storage.
prescribed by the approving authority.
(2) Covered space is preferred.
d. Report equipment in administrative storage as (3) Open sites should be improved hardstand, if
prescribed for all reportable equipment. available. Unimproved sites should be firm, well drained,
and kept free of excessive vegetation.
e. Perform inspections, maintenance services, and
lubrication as specified herein. b. Storage Plan.

(1) Store equipment to provide maximum

f. Records and reports to be maintained for
protection from the elements and to provide access for
equipment in administrative storage are those prescribed
inspection, maintenance, and exercising. Anticipate
by DA PAM 738-750, for equipment in use.
removal or deployment problems and take
suitable precautions.
g. When determining maintenance actions
required, 10% variance is acceptable on time, running (2) Take into consideration such environmental
hours, or mileage. conditions as extreme heat or cold; high humidity; blowing
sand, dust, or loose debris; soft ground; mud; heavy snows;
h. Accomplishment of applicable PMCS, as earthquakes; or combinations thereof, and take adequate
mentioned throughout this section, will be on a quarterly precautions.
basis.
(3) Establish afire plan and provide for adequate
firefighting equipment and personnel,
4-105. Definition of Administrative Storage
c. Maintenance Services and Inspection.
a. The placement of equipment in administrative
storage can be for short periods of time when a shortage of (1) Maintenance Services. Prior to storage,
maintenance effort exists. perform the next scheduled unit PMCS.

4-170
 TM 9-2330-356-14

(2) Inspection, Inspect and approve equipment CAUTION

prior to storage. Do not place equipment in storage in a
Non Mission Capable condition.
Place a piece of barrier material between
desiccant bags and metal surfaces.
d. Auxiliary Equipment and Basic Issue Items.
NOTE
(1) Process auxiliary and basic issue items Air circulation under draped covers reduces
simultaneously with the major item to which they are deterioration from moisture and heat.
assigned. If possible, store auxiliary and basic issue items
with the major item. (4) Weatherproofing. Sunlight, heat, moisture
(humidity), and dirt tend to accelerate deterioration.
(2) If stored apart from the major item, mark Install all covers (including vehicle protective closures)
auxiliary and basic issue items with tags indicating the authorized for the equipment. Close and secure all
major item, its registration or serial number and locations, openings except those required for venting and draining.
and store in protective type closures. Seal openings to prevent the entry of rain, snow, or dust.
Insert desiccant when complete seal is required. Place
equipment and provide blocking or framing to allow for
(3) In addition, place a tag or list indicating the ventilation and water drainage. Support cover away from
location of the removed items in a conspicuous place on item surfaces which may rust, rot, or mildew.
the major item.
4-107. Care of Equipment in Administrative
Storage
e. Correction of Shortcomings and Deficiencies.
Correct all shortcomings and deficiencies prior to storage, a. Maintenance Services. After equipment has been
or obtain a deferment from the approving authority. in administrative storage, inspect, service, and exercise as
specified herein.
f. Lubrication. Lubricate the equipment in
accordance with Section I of Chapter 3. b. Inspection. Inspection will usually be visual and
must consist of at least a walk-around examination of all
equipment to observe any deficiencies that may have
g. Genera! Cleaning, Painting, and Presenation. occurred. Inspect equipment in open storage weekly and
that in covered storage monthly. Immediately after any
severe storm or environmental change inspect all
CAUTION equipment. The following are examples of things to look
for during visual inspection:

Do not direct pressurized water or steam (1) Low or flat tires.

against air cleaners, exhaust outlets,
unsealed electrical systems, fire control (2) Condition of preservatives, seals, and wraps.
instruments, or any exterior opening which
will damage a component. (3) Corrosion or other deterioration.

(4) Missing or damaged parts.

(1) Cleaning. Clean the equipment of dirt, grease,
(5) Water in compartments.
and other contaminants, but do not use vapor decreasing.
Remove foreign objects that are wedged between wheels. (6) Any other readily recognizable shortcomings
or deficiencies.
(2) Painting. Remove rust and damaged paint by
scraping, wire brushing, sanding, or buffing. Sand to a c. Repair During Administrative Storage. Keep
smooth finish and spot paint as neccssary (TB 43-0209). equipment in an optimum state of readiness. Accomplish
required services and repairs as expeditiously as possible.
Whenever possible, perform all maintenance on site.
(3) Preservation. After cleaning and during,
immediately coat unpainted metal surfaces with an oil or d. Exercising. Exercise equipment in accordance
grease, as appropriate. Use lubricants as approved in with table 4-14, Exercise Schedule; and the following
Section I of Chapter 3. instructions:

4-171
TM 9-2330-356-14

(1) Vehicle Major Exercise. Depreserve c. Seals. Seals may develop leaks during storage, or
equipment by removing only that material restricting shortly thereafter. If leaking persists, refer to the
exercise. Close all drains, remove blocks, and perform all applicable maintenance section in this manual for
before-operation checks. Couple semitrailer to towing corrective maintenance procedures.
vehicle and drive for at least 25 miles. Make several right
and left 900 turns. Make several hard braking stops 4-109. Removal of Equipment from Administrative
without skidding. Do the following during exercising when Storage
it is convenient and safe: operate all other functional
components and perform all During and After operation a. Activation. R e s t o r e e q u i p m e n t t o n o r m a l
checks. operating condition in accordance with the instructions
contained in Section I of Chapter 4, Service Upon Receipt
(2) Scheduled Services. Scheduled services will
of Material.
include inspection as described paragraph b, and be
conducted in accordance table 4-14. Lubricate in
accordance with Section I of Chapter 3. b. Servicing. Resume the maintenance service
schedule in effect at the commencement of storage, or
(3) Corrective Action. Immediately take action to service the equipment before the scheduled dates in order
correct shortcomings and deficiencies noted. Record to produce a staggered workload.
inspection and exercise results on DA Form 2404. Record
and report all maintenance actions on DA Form 2407. 4-110. Preparation of Equipment for Shipment
After exercising, restore the preservation to the original
condition. Replenish lubricants used during exercising, a. Refer to TM 55-200, TM 55-601, and TM 743-
and note the amount on DA Form 2409-1. 200-1 for additional instructions on processing, storage,
and shipment of material.
e. Rotation. To ensure utilization of all assigned
material, rotate items in accordance with any rotational
b. Semitrailers that have been removed from
plan that will keep the equipment in an operational
storage for shipment do not have to be reprocessed if they
condition and reduce the maintenance effort.
reach their destination within the administrative storage
4-108. Procedures for Common Components and period. Reprocess only if inspection reveals any corrosion,
Miscellaneous Items or if anticipated in-transit weather conditions make it
necessary.
a. Tires. Visually inspect tires during each
walk-around inspection of the semitrailer. This inspection c. When a semitrailer is received and has already
includes checking about 5% of the tires, including spare been processed for domestic shipment, as indicated on
tire, with a tire gage. Inflate, repair, or replace as DD Form 1397, the semitrailer does not have to be
necessary, those found to be low, damaged, or excessively reprocessed for storage unless corrosion and
worn. With a crayon, mark inflated and repaired tires for deterioration are found during the inspection upon
checking at the next inspection. receipt. List all discrepancies found because of poor
preservation, packaging, packing, marking, handling,
b. Air Lines and Reservoirs. Drain air lines and loading, storage, or excessive preservation on SF 364.
reservoirs of condensation, and leave the drain cocks Repairs that cannot be handled by the receiving unit must
open. Attach a caution tag, annotated to provide for have tags attached listing the needed repairs. A report of
closing of drain cocks when equipment is exercised. Place these conditions will be submitted by the unit commander
tags in a conspicuous location. for action by an ordnance maintenance unit.

Table 4-14. Exercise Schedule.

Weeks 2 4 6 8 10 12 14 16 18 20 22 24
PMCS x x

Scheduled Services x x x x x

Vehicle Major Exercise x

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 TM 9-2330-356-14

CHAPTER 5
DIRECT SUPPORT AND GENERAL SUPPORT
MAINTENANCE INSTRUCTIONS

Section I. REPAIR PARTS, SPECIAL TOOLS AND EQUIPMENT

5-1. Repair Parts support and general support to maintain the semitrailers.
Additional information for special tools is contained in
Repair parts required for direct support and general TM 9-2330-356-24P.
support maintenance of the M967, M967A1, M969,
M969A1, M970, and M970A1 semitrailers are listed and 5-3. Fabricated Tools and Equipment
illustrated in TM 9-2330-356-24P.
Table 5-2 contains fabrication instructions for all tools
5-2. Special Tools and Equipment which must be made by direct support or general support
personnel for maintenance of the semitrailers. Table 5-3
Table 5-1 contains a list of all special tools, components of contains information on fabricated tube lines required by
tool sets, and test and support equipment needed by direct direct support and general support maintenance.

Table 5-1. Special Tools, Test, and Support Equipment.

NSN or Reference
Item Use
Reference No. Fig. No. Para. No.
Puller, flywheel and sprocket 5120-00-613-8775 7-22 7-27 Remove flywheel and sprocket from
11671732 (1 9207) crankshaft
Compression tool, 5180-01-048-8603 747 7-69 Remove end install spring seat
plunger spring TSE-76215 (01843)
Test fixture, delivery valve 5180-01-048-8602 748 7-69 Testing fuel injection pump delivery
TSE-76226 (01 843) valve
or equivalent
Centering sleeve 2910-00-448-0197 7-53 7-70 Assembly of fuel injector
TSE-773 (01 843)
Gage, compression tester 4910-00-870-6283 7-25 7-89 Testing cylinder compression
10899180 (19207)
Adapter, compression tester 4910-00-019-5241 7-25 7-89 On engine
Driver, valve seat 4820-01-284-2153 7-56 7-72 installation of valve seats in engine head
420-0270 (44940)
Driver, valve guide 5120-01-033-7505 7-55 7-72 Removal and installation of valve guides
420-0300 (44940)
Remover, valve 3450-01-014-0788 7-57 7-72 Removal of valve seats
420-0311 (44940)
Driver, oil seal 5120-01-008-3863 7-28 7-75 Installation of gear cover oil seal
420-0281 (44940)
Driver, bearing 5120-00-125-4402 7-36 7-40 Installation of crankshaft
420-0326 (44940) 7-34 7-38 and camshaft bearings
Puller ring, gear 5120-01-014-0903 7-33 7-36 Removal of gear from crankshaft
420-0275 (44940)
Driver, oil seal 5120-00-125-4411 7-34 7-77 Remove and install oil seal on rear
420-0250 of crankshaft

5-1
TM 9-2330-356-14

Table 5-2. Fabricated Tools and Equipment.

table 5-2

5-2
 TM 9-2330-356-14

Table 5-2. Fabricated Tools and Equipment (Cont).

Sketch or Diagram:

Table 5-3. Fabricated Tube Lines.

Part No. Bulk Part No. Bulk Tubing Dia.

11670916-1 CPR 104420-1 1/4 60
11670916-2 CPR 104420-2 3/8 60"
11670916-3 8360440 5/8 40"

Section II. DIRECT SUPPORT AND GENERAL SUPPORT TROUBLESHOOTING

5-4. General 5-5. Use

a. Information in this section is for use by direct

a. This section contains troubleshooting
support and general support personnel.
information for locating and correcting most of the
troubles which may develop in the semitrailers. Each b. Tables 5-4 and 5-5 are to be used in conjunction
malfunction for an individual component, unit, or system with and as a supplement to Operator Troubleshooting
is followed by a list of tests or inspections which will help (table 3-2) and Unit Troubleshooting (table 4-9), located
you to determine corrective actions to take. You should elsewhere in this manual.
perform the test/inspections and corrective actions in the
order listed. 5-6. Procedures and Instructions

b. This manual cannot list all malfunctions that may NOTE

occur, nor all tests and inspections and corrective actions. Before you use the troubleshooting tables,
If a malfunction is not listed or is not corrected by listed ensure that you have performed all applicable
corrective actions, notify your supervisor. operational checks.

c. Ensure that all safety precautions listed in the a. Tables 5-4 and 5-5 include procedures for
Warning Summary are followed while performing on-equipment tests and inspections, and for testing the
troubleshooting. Pay close attention to all WARNINGS component or assembly after it has been removed from
and CAUTIONS. the semitrailer.

5-3
TM 9-2330-356-14

b. Visual inspections are to be made before d. Complete disassembly of a component or

operating the equipment or performing any functional assembly to determine the cause of malfunction should be
tests. The purpose of these inspections is to determine the done only if the preliminary tests fail to show the trouble.
condition of the component or assembly for obvious A careful inspection of the component parts should then
indications of damage. If damage is evident, corrective be made to pinpoint the problem. An analysis of the
action shall be taken to prevent further damage. damaged part should also be made to determine if
c. Inspections and tests performed after the corrective action, other than replacing the damaged part,
can be taken to prevent recurrence of the problem.
component or assembly has been removed from the
semitrailer are to verify the original diagnosis and to
uncover further defects.
Table 5-4. Troubleshooting - Direct Support

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

BRAKE SYSTEM

1. RAPID BRAKE LINING WEAR.

Step 1. Check the linings to ensure that the correct linings are being used. Combination linings should not
be used.
Install correct linings on brake shoes (para 6-6).
Step 2. Inspect brake drums for scoring, cracks, or uneven wear.
If brake drum is cracked or badly damaged, it must be replaced. If scoring is less than
1/16-inch deep, the brake drum can be rebored (para 6-7).

ENGINE

2. STARTER MOTOR DOES NOT TURN - HIGH CURRENT DRAW.

Step 1. Check starter for grounded switch, terminals, or field (para 7-90)
Replace grounded component.
Step 2. Check for frozen armature shaft bushing (para 7-90).
Replace bushing. Replace starter if necessary.

3. STARTER DOES NOT TURN - NO CURRENT DRAW.

Step 1. Check for open armature windings (para 7-90).

Replace starter.
Step 2. Check for open starter field windings (para 7-90).
Replace starter.
Step 3. Check for broken or weak brush springs (para 7-78 or 7-90),
Replace brush springs if necessary.
Step 4. Check for worn commutator (high mica) (para 7-78).
Replace starter. .-

5-4
 TM 9-2330-356-14

Table 5-4. Troubleshooting - Direct Support (Cont).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

ENGINE (Cont)

4. SLOW STARTER SPEED.

Step 1. Check for worn armature shaft bushings (para 7-78).

Replace bushings. Replace starter if necessary.

Step 2. Check for burned solenoid contacts (para 7-78).

Replace solenoid.

Step 3. Check for open or shorted field windings (para 7-90).

Replace starter.

Step 4. Check for worn engine crankshaft, rod, and camshaft bearings (para 7-77).
Replace bearings as necessary. Repair or replace other worn components as necessary.

5. STARTER WILL NOT ENGAGE FLYWHEEL.

Step 1. Check starter clutch (bendix) and pinion (para 7-78).

Repair or replace as necessary.
Step 2. Check for damaged ring gear (para 7-78).
Replace ring gear if necessary.

6. ENGINE WILL NOT START WHEN CRANKED.

Step 1. Check for faulty injection caused by dirty fuel.

Replace with clean fuel. Service fuel filters. Clean and, if necessary, repair or replace fuel
injection nozzle (paras 7-28 and 7-70).

Step 2. Check for poor compression.

See Malfunction 15, LOW ENGINE COMPRESSION.

Step 3. Check for incorrect timing.

Retime engine (para 7-87).

7. ENGINE MISFIRES.

Step 1. Check for poor compression.

See Malfunction 15, LOW ENGINE COMPRESSION.
Step 2. Check for defective or dirty injection nozzles (para 7-70).
Clean or replace nozzles.

5-5
TM 9-2330-356-14

Table 5-4. Troubleshooting - Direct Support (Cont).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

ENGINE (Cont)

7. ENGINE MISFIRES (Cont).

Step 3. Check for faulty injection pump or nozzles (para 7-87).

Repair, overhaul, rebuild, or replace pump and nozzles as necessary.

Step 4. Check for broken valve spring (para 7-72).

Replace broken springs.
Step 5. Check cylinder head assembly for build-up of carbon (para 4-73).
Clean carbon from cylinder head assembly.

8. LOW ENGINE POWER.

Step 1. Check for poor compression.

See Malfunction 15, LOW ENGINE COMPRESSION.
Step 2. Check for incorrect timing.
Retime engine (para 7-87).

9. LOW OIL PRESSURE.

Step 1. Check to see if oil bypass valve is stuck open (para 7-74).
Clean or replace oil bypass valve and spring.
Step 2. Check for worn oil pump (para 7-35).
Replace oil pump.
Step 3. Suspect worn engine bearings (para 7-77).
Notify general support maintenance personnel.

10. HIGH OIL PRESSURE.

Step 1. Check to see if oil bypass valve is stuck closed (para 7-74).
Clean or replace oil bypass valve and spring.
Step 2. Check for clogged oil passages.
Clean all oil lines and passages.

11. EXCESSIVE OIL CONSUMPTION.

Suspect worn valve guides, bad seals in crankcase, sticking or worn piston rings. Notify
general support maintenance personnel.

5-6
 TM 9-2330-356-14

Table 5-4. Troubleshooting - Direct Support (Cont).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

ENGINE (Cont)

12. BLACK SMOKEY EXHAUST AND EXCESSIVE FUEL CONSUMPTION.

Step 1. Check for incorrect timing (para 7-87).

Retime engine.
Step 2. Suspect bad valves.
Notify general support maintenance personnel.

13. TAPPING OR CLICKING SOUND FROM CYLINDER HEAD.

Step 1. Check for too great a valve clearance (para 7-88).

Adjust rocker arm to valve clearance.
Step 2. Check for broken valve spring (para 7-72).
Replace broken springs.

14. METALLIC KNOCKING, CLICKING, OR POUNDING FROM CRANKCASE OR CYLINDER BLOCK.

Suspect loose bearings on connecting rods, or loose pistons. Notify general support
maintenance personnel.

15. LOW ENGINE COMPRESSION.

Step 1. Check for loose cylinder head (para 7-72).

Properly tighten head.
Step 2. Check for leaky head gasket (para 7-72).
Replace gasket.
Step 3. Check for broken valve spring (para 7-72).
Replace broken springs.
Step 4. Suspect bad valves, piston rings, or scored cylinder walls.
Notify general support maintenance personnel.

ALTERNATOR AND CHARGING CIRCUIT

16. UNDERCHARGED BATTERIES.

Step 1. Check for moisture or dirt on top of batteries causing continuous battery discharge.
Clean the batteries (para 4-23).

5-7
TM 9-2330-356-14

Table 5-4. Troubleshooting - Direct Support (Cont).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

ALTERNATOR AND CHARGING CIRCUIT (Cont)

16. UNDERCHARGED BATTERIES (Cont).

Step 2. Check for loose or corroded battery terminals and connections, or bad battery.
Clean and tighten battery connections. Test battery (para 4-23).

Step 3. Look for worn or glazed pulley or loose belts on alternator drive.

Adjust tension on alternator drive belt (para 4-78). Replace pulley if worn or glazed.

Step 4. Check for excessive voltage drop between alternator and batteries (para 7-91).
Clean and tighten connections at positive and negative output terminals on alternator
(para 7-91). Also check connections at buss bar assembly and ground (wire No. 3) on
engine (fig. 4-28 or 4-29).

Step 5. Check engine wiring, especially wire No. 6 (from buss bar to starter solenoid and from buss bar to
engine junction box), for damage (fig. 4-28 or 4-29).

Replace damaged wire.

Step 6. Check for low setting on voltage regulator (para 7-91).

Adjust voltage regulator.

Step 7. Check for low alternator output (para 7-91).

Repair or replace alternator.

NOTE
Small current draw (90 milliamps) through field circuit when engine Is not running Is normal.
This is the bleed circuit built Into the voltage regulator.

Step 8. Test for leaking positive rectifier causing field current draw (2-4 amps) when engine is not running.

Replace diode trio (para 7-79).

Step 9. Check for faulty voltage regulator (para 7-91).

Replace voltage regulator.

17. OVERCHARGED BATTERIES (Indicated by high water usage).

Step 1. Check battery case for cracks or damage (para 4-23).

Replace damaged battery.

Step 2. Check specific gravity or voltage of individual cells (para 4-23).

Replace defective battery.

5-8
 TM 9-2330-356-14

Table 5-4. Troubleshooting - Direct Support (Con't).

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

ALTERNATOR AND CHARGING CIRCUIT (Cont)

17. OVERCHARGED BATTERIES (Indicated by high water usage) (Cont).

Step 3. Test for high voltage regulator setting or faulty voltage regulator (para 7-91 ).

Adjust voltage to proper setting (para 7-91). Replace voltage regulator if voltage setting
cannot be lowered,

18. LOW ALTERNATOR OUTPUT.

Step 1. Perform full field test to determine if problem is in alternator or voltage regulator (para 7-91).

If voltage does not increase noticeably (.3V or more) during test, alternator is faulty and
should be repaired or replaced.

Step 2. if voltage increased noticeably during test in Step 1, the problem is either in the diode trio or the
voltage regulator. Remove diode trio and test for proper functioning (para 7-91).

Replace diode trio if test shows one of the diodes is faulty.

Step 3. Remove and inspect voltage regulator. Check for printed circuit path that has burned open
(para 7-91).

Replace voltage regulator.

19. SHORT LIFE OF VOLTAGE REGULATOR.

Step 1. Check that alternator and battery connections are correct. Reversing polarity, even momentarily,
will damage the voltage regulator.

Notify operator and unit maintenance personnel about proper procedures.

Step 2. Inspect voltage regulator before installation for defects or damage in shipment or handling.

Replace voltage regulator if damaged or defective.

20. NOISY ALTERNATOR.

Step 1. Check for loose pulley or mounting bolts (para 4-78).

Tighten mounting bolts and alternator drive pulley.

Step 2. Check for worn or sticking bearings by removing alternator drive belt and rotating alternator by
hand (para 4-78 or 6-20).

Repair or replace alternator.

5-9
TM 9-2330-356-14

Table 5-5. Troubleshooting - General Support.

MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION

ENGINE

1. EXCESSIVE OIL CONSUMPTION.

Step 1. Check for worn valve guides (para 7-72).

Replace guides, valves, and seals.
Step 2. Check for worn or sticking piston rings (para 7-31).
Replace rings if necessary.
Step 3. Check for air leaks to crankcase.
Replace gaskets and seals as necessary.

2. METALLIC KNOCKING, CLICKING, OR POUNDING FROM CRANKCASE OR CYLINDER BLOCK.

Step 1. Check for worn or loose connecting rod bearings (para 7-31.).
Replace bearings if necessary.
Step 2. Check for loose piston and connecting rod assembly (para 7-31).
Repair or replace assembly.

3. LOW ENGINE COMPRESSION.

Step 1. Check for sticking valves (para 7-72).

See Malfunction 4, STICKING VALVES.
Step 2. Check for leaking valves (para 7-72).
Clean and, if necessary, regrind valves and valve seats.
Step 3. Check for worn or sticking piston rings (para 7-31).
Replace rings if necessary. Check condition of cylinder walls.
Step 4. Check for worn cylinder walls and pistons (para 7-31).
Refinish cylinder walls. Repair or replace pistons.

4. STICKING VALVES.

Step 1. Check for dirty, scored, or gummy valve stems or guides (para 7-72).
Step 2. Check for weak or broken springs (para 7-72).
Replace springs.
Step 3. Check clearance between valve stem and guide (para 7-72).
Correct clearance.

5-10
 TM 9-2330-356-14

Section III. GENERAL MAINTENANCE

5-7. General Maintenance (3) Protect disassembled parts from dust,

blowing sand, and moisture which can cause rapid wear
a. This section contains general maintenance and deterioration of bearings, gears, and other machine
instructions which are the responsibility of direct support parts.
and general support maintenance personnel. These
instructions pertain to several components or assemblies c. General Instructions.
and otherwise would need to be repeated several times
throughout the chapters. Special information on general (1) In disassembly, remove only as many parts or
repair practices, parts replacements, welding, riveting, components as required for indicated repair. Complete
and tools are also included. disassembly of a component is not always required to
make repairs. Good judgement should be used to keep
b. Ensure that all safety precautions listed in the disassembly operations to a minimum.
Warning Summary are followed while performing
maintenance. Pay close attention to all WARNINGS and (2) During disassembly, tag critical parts to
CAUTIONS. ensure proper reassembly. Mark mating parts by scribe
marks or indelible ink to be certain of correct positioning
5-8. General Maintenance Procedures at assembly.

a. Work Area. (3) Unserviceable or unrepairable assemblies

will be broken down into items of issue, and serviceable
(1) Make sure the work area is clean before you parts will be returned to stock. Parts or assemblies which
disassemble the pump or engine. cannot be repaired, selective-fitted, or reclaimed to
standards contained in this manual, will be salvaged and
(2) Make sure that materials needed for the replaced with new parts.
maintenance task are at hand. These may include cleaning
solvents, lubricants, buckets, or other containers for (4) If a required new part is not available,
cleaning or keeping components separated, clean wiping reconditioning of the old part is necessary. Such parts
cloths, and the proper tools. should be inspected carefully after reconditioning to
determine their suitability and probable service life.
b. Cleaning of Components, Assemblies or Parts. Replacement parts should be requisitioned immediately.
(1) Clean the exterior of the component or (5) Replace seals and gaskets of all components
assembly before disassembly to keep foreign matter from disassembled.
bearings, gears, and other machine-surfaced parts which
are subject to scoring and other such damage. (6) Replace springs if broken, distorted, or
cracked, or if they do not conform to specific tensile
WARNING standards.

(7) Replace screws or nuts with damaged threads

Compressed air used for drying or cleaning or rounded comers. Replace lockwashers.
purposes must not exceed 30 psi (207 kPa).
Wear protective clothing (goggles and (8) Replace keys if damaged.
gloves) and use caution to avoid Injury to per-
sonnel. (9) During assembly, subassemblies should be
assembled first. The subassemblies can then be combined
(2) If compressed air is used to clean parts, you into major components and installed to make a complete
should make sure it is free of dirt and other contaminants. major assembly.

5-11
TM 9-2330-356-14

d. Care of Bearings. (2) Read and observe all safety precautions in the
Warning Summary before performing any welding
operation.
WARNING
b. Surface Protection.

Dry cleaning solvent P-D-680 is toxic and (1) Clean and repaint all surfaces on which paint
flammable. Always wear protective has deteriorated or become damaged.
goggles and gloves, and use only in a well-
ventllated area. Avoid contact with skin, (2) Do not paint grounding studs or electrical
eyes, and clothes, and DO NOT breathe va- harnesses or leads.
pors. DO NOT use near open flame or ex-
cessive heat. The solvents flash point Is (3) Paint exterior of vehicle olive drab in
1OOF-138F (38C-59C). If you be- accordance with TT-E-529 or TT-E-485.
come dizzy while using cleaning solvent,
Immediately get fresh air and medical help. c. Repairing Damaged Threads.
If solvent contacts eyes, immediately wash
your eyes with water and get medical aid. (1) When determined feasible by inspection,
damaged threads should be repaired by retapping, by use
Compressed air used for drying or clean- of a thread die or a thread restorer file.
ing purposes must not exceed 30 psi
(207 kPa). Wear protective clothing (2) Tapped holes for screw thread inserts that
(goggles and gloves) and use caution to have mutilated threads may be repaired by:
avoid Injury to personnel.
(a) Drilling and tapping holes oversize, then
NOTE installing larger screws.

Refer to TM 9-214 for further Information on (b) Filling tapped hole by welding, then
the inspection, care, and maintenance of redrilling and tapping hole to original size.
bearings.
d. Removing Burrs, Scratches, and Raised Metal.

(1) Clean ball and roller bearings by placing them

in a wire basket and immersing in a container of fresh dry WARNING
cleaning solvent (item 11, Appendix E). Agitate the
bearings in the solvent to remove all traces of old Dry cleaning solvent P-D-680 Is toxic and
lubricant. flammable. Always wear protective goggles
and gloves, and use only In a well-ventilated
(2) After cleaning the bearings, dry them with area. Avoid contact with skin, eyes, and
clean compressed air. Take care to prevent spinning the clothes, and DO NOT breathe vapors. DO
bearings when using a compressed air jet. NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F
(3) Dip the cleaned bearings in clean engine oil (38C-59C). If you become dizzy while us-
and immediately wrap them in a lint-free cloth (item 24, ing cleaning solvent, immediately get fresh
Appendix E) to protect them from dust and other foreign air and medical help. If solvent contacts eyes,
matter. immediately wash your eyes with water and
get medical aid.

5-9. Specific Procedures

(1) Use fine mill file, soft stone, or crocus cloth
(item 4, Appendix E) dipped in dry cleaning solvent
a. Welding. (item 11, Appendix E) to remove burrs, scratches, or
raised metal.
(1) Refer to TM 9-237 for welding instructions
and materials. All welds must reflect good workmanship (2) When filing aluminum, clean file often with
and approved welding procedures. Welds must be secure, steel file brush to avoid loading file with aluminum
free from cracks, excessive spatter, and obvious defects. particles which will gouge work surface.

5-12
 TM 9-2330-356-14

e. Cleaning Materials and Methods. Submerge and agitate the basket in a tank containing dry
cleaning solvent (item 11, Appendix E). Repeat, using a
second tank with clean solvent. Extent of treatment in
WARNING each tank will depend on ease with which parts are
cleaned.
Dry cleaning solvent P-D-680 is toxic and
flammable. Always wear protective goggles (b) Vapor-degreaser Method. Tanks
and gloves, and use only in a well-ventliated containing a heated solution of trichlorethylene or
area. Avoid contact with skin, eyes, and perchlorethylene (type 11) are used for decreasing items
clothes, and DO NOT breathe vapors. DO that are very greasy or oily and are not readily cleaned by
NOT use near open flame or excessive heat. the dip-tank method. Place parts in a perforated metal
The solvents flash point Is 100F-138F basket and submerge below the vapor in the tank. Keep
(38C-59C). If you become dizzy while the basket in this position until all the grease, oil, or dirt
using cleaning solvent, immediately get fresh melts and runs off the parts. If necessary, material maybe
air and medical help. if solvent contacts eyes, washed with decreasing spray unit.
Immediately wash your eyes with water and
get medical aid.
(c) Steam Method. Place parts in a
perforated metal basket and steam treat until clean. This
(1) Refer to TM 9-247 for cleaning materials to method is less efficient than the vapor-degreaser method,
be used. and parts may require additional cleaning to remove final
traces of grease, oil or dirt, particularity from recesses.
(2) Cleaning is normally done by the dip-tank
and/or vapor-degreaser methods, or by cleaning with (2) If some time is to elapse before the start of
cloths soaked in dry cleaning solvent (item 11, repair or overhaul operations, apply a coat of light grade
Appendix E).
PE-10 preservative oil to all finished metal surfaces to
prevent rusting.
f. Cleaning of Material Received From Storage.

WARNING WARNING

Dry cleaning solvent P-D-680 Is toxic and Compressed air used for drying or cleaning
flammable. Always wear protective goggles purposes must not exceed 30 psi (207 kPa).
and gloves, and use only in a weii-ventilated Wear protective clothing (goggles and
area. Avoid contact with skin, eyes, and gloves) and use caution to avoid injury to
clothes, and DO NOT breathe vapors. DO personnel.
NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F
(38C-59C). if you become dizzy while g. Cleaning After Shop Inspection. After inprocess
using cleaning solvent, immediately get fresh shop inspections, dip parts in a tank containing fingerprint
air and medical help. If solvent contacts eyes, remover oil (item 9, Appendix E). Remove parts (with
immediately wash your eyes with water and rubber gloves), and dry thoroughly with compressed air or
get medical aid. by wiping with clean, lint-free cloths (item 24,
Appendix E). Apply preservatives as soon as possible after
cleaning.
(1) Material received from storage by direct and
general support maintenance units will be cleaned by the
dip-tank, vapor-degreaser, or steam method; whichever is h. Lubrication. Refer to Chapter 3, Section I for
applicable or available. Descriptions of these methods are lubrication instructions.
as follows:
i. Installation of Split Couplings. When installing
(a) Dip-tank Method. Disassemble as couplings and gaskets, use the procedure described in
required and place parts in a perforated metal basket. paragraph 4-85.

5-13
TM 9-2330-356-14

Section IV. REMOVAL AND INSTALLATION OF MAJOR COMPONENTS

5-10. Upper Coupler (Kingpin) Plate Replacement 5-11. Torque Rods (Up r and Lower) M967,
(Later Models) (Fig. 5-1) M969, and M970 except 970 SN TC-0843, TC-
0844, and TC-103 thru TC-178) (Fig. 5-2).
a. Removal. a. Removal.
(1) Remove cotter pins and slotted nuts from
(1) Provide a balanced support for upper coupler threaded end of ball assemblies.
plate (4).
(2) Tap threaded end of ball assembly with a soft
(2) Remove twelve locknuts (1), bolts (3), and hammer to loosen ball assembly from bracket.
washers (2). Discard locknuts.
(3) Use a crowbar or cold chisel to pry the torque
(3) Remove upper coupler plate (4) from under rod from the brackets. The ball assemblies are mounted in
semitrailer. robber and can be moved out of normal alinement for
removal or installation.
b. Installation. b. Installation.
(1) Place upper coupler plate (4) on a (1) insert threaded end of ball assembly in hole
suitable support. of bracket on the bogie assembly. Using torque rod as a
lever, bend the ball assembly out of normal alinement so
(2) Lift upper coupler plate (4) into position ball assembly on other end is near the hole in the axle
under semitrailer. Loosely install twelve bolts (3), washers bracket.
(2), and new locknuts (l).
(2) Use a crowbar or cold chisel to bend the ball
(3) Ensure that upper coupler plate (4) is flush assembly so it can be pushed into hole in axle bracket. Use
against semitrailer. Tighten twelve locknuts (1) to care not to damage the ball assembly.
130-140 lb.-ft. (3) Install slotted nuts on lower torque rod and
(4) Lubricate upper coupler plate (4) (Chapter 3, tighten to 350-400 lb.-ft.
Section I). (4) Install cotter pins to secure the slotted nuts.

Figure 5-1, Upper Coupler (Kingpin) PIate (Later Models)

5-14 Change 3
 TM 9-2330-356-14

Figure 5-2. Upper and Lower Torque Rods (M967, M969, and M970 except M970
-
SN TC-0843, TC-0844, and TC-103 thru TC-178).
5-12. positioned as close as possible to the lower torque rod
M970 except M970 SN TC-0843, TC-0844, and TC- brackets on the axles.
103 thru T-178).
a. Removal (FIgs. 5-3 and 5-4). (3) Position a jack under the torque rod bracket
on the trunnion cross tube. Jack up the trunnion cross tube
(1) Position semitrailer on hard level surface with until the weight of the vehicle is removed from the spring
front resting on landing gear. to be removed, Put supports or cribbing under the rear
corners of the semitrailer frame.
(2) Jack Up the front and rear axles on the side
where the spring is to be removed until wheels arc
approximately l-inch off the ground. The jacks should be (4) Remove wheels from both axles (para 4-49).

Change 3 5-15
TM 9-2330-356-14

Figure 5-3. Suspension Assembly (M967, M969, and M970 except M970
SN TC-0843, TC-0844, and TC-103 thru TC-178).

Figure 5-4. Suspension Spring (M967, M969, and M970 except M970
SN TC-0843, TC-0844, and TC-103 thru TC-178).

5-16 Change 3
 TM 9-2330-356-14

WARNING (6) Connect four hoses to broke air chambers as

tagged.
Release air pressure from both air reservoirs (7) Install wheels (pars 4-49).
before doing any work on brake lines or other
pressurized air lines. (8) Remove supports and jacks.
5-13. Suspension M967A1, M969A1, and
(5) Release air from both air reservoirs by M970A1 including M970 SN TC-0843, TC-0844,
opening drain cocks on bottom of reservoirs (fig. 4-79). and TC-103 thru TC-178).
Tag and disconnect the four hoses from brake chambers on
both axles on side which is raised to allow for removal of a Removal (Fig. 5-5).
the spring assembly.
(1) Position semitrailer on hard level surface with
front resting on landing gear.
WARNING
WARNING
If spring assembly Is seized in spring seat,
jack the rear axle higher to lift the spring. Be Release air pressure from both air reservoirs
careful not to lift semitrailer off the supports before doing any work on brake lines or other
under the frame. pressurized air lines.

(6) Remove four nuts and washers from the two (2) Release air from both air reservoirs by
U-bolts. Remove the U-bolts and spring saddle. Loosen opening drain cocks on bottom of reservoirs (fig. 4-79).
two screws which clamp the spring assembly in the spring
seat. Pry spring assembly from spring seat. (3) Loosen wheel lug nuts while wheels are on
ground.
(7) Disconnect upper torque rod (para 5-11)
from rear axle and revolve the axle rearward to allow for (4) Jack up rear of semitrailer and support under
removal of the spring. frame securely until weight of semitrailer is removed from
springs and axles.
(8) Use a lifting device to lift the spring from the
spring guide bracket on the axle, and remove it from the (5) Remove wheels from both axles (pars 4-49).
semitrailer.
(6) Remove both axles (para 5-15).
b. Installation (Figs. 5-3 and 5-4).
(7) Position a jack under the trunnion tube close
(1) Lubricate the spring bearing plate. Insert end to the inside of each trunnion hanger.
of spring, larger leaf down, into spring guide bracket on
forward rude. (8) Raise jacks just enough to support trunnion
tube.
(2) Position spring on spring seat so center, bolt of
(9) Remove four nuts, four washers, and four
spring is over reccess in spring seat. Press or drive the spring bolts which fasten the trunnion hanger to the mounting
into place. Ensure that the spring center bolt is in the bracket. Repeat for opposite side.
recess and the spring is firmly seated.
(10) Slowly lower suspension and support
(3) Put the spring saddle in position on the trunnion tube.
spring. The nut on the center bolt fits into the recess on
the saddle. Install U-bolts over saddle and through holes b. Disassembly (Fig. 5-5).
in spring seat. Install four washers and nuts on U-bolts and
tighten evenly to 200-320 lb.-ft. Tighten the two screws (1) Use lifting device to support spring.
which clamp the spring to the spring seat to 650-750 lb.-ft.
(2) Remove four nuts and four washers from
(4) Using jacks under rear axle, revolve the rude u-bolts.
rearward so end of spring will enter guide bracket on axle.
Release jacks after spring clears the guide bracket. (3) Remove two U-bolts and wear plate.

(5) Connect the upper torque rod to bracket on (4) Using lifting device, lift spring from upper
rear axle (para 5-11). trunnion hub and remove it from the suspension.

Change 3 5-17
TM 9-2330-356-14

Figure 5-5. Suspension Assembly (M967A1, M969A1, and M970A1 including M970
SN TC-0843, TC-0844, and TC-103 thru TC-178).

(5) Remove upper and lower trunnion hubs and (5) Put wear plate in position on the spring. The
trunnion tube. nut on the center bolt of the spring fits into hole in the
wear plate.
(6) Remove rubber bushing and trunnion washer
from trunnion tube. (6) Install two U-bolts over wear plate and
through holes in upper and lower trunnion hubs.
(7) Loosen two trunnion hanger capscrews and
nuts, and slide hanger off trunnion tube. (7) Install four washers and four nuts on U-bolts,
and tighten evenly to 200--320 lb.-ft.
(8) Repeat steps (1) through (7) for opposite side.
(8) Repeat steps (1) through (7) for opposite side.
c. Assembly.
d. Installation.
(1) Slide trunnion hanger onto trunnion tube. Do (1) Place a jack under trunnion tube close to
not tighten trunnion hanger capscrews and nuts at this inside of each trunnion hanger, and slowly raise
time. suspension into position under trunnion support brackets.
(2) Slide trunnion washer and rubber bushing (2) Aline holes in the trunnion hanger with holes
onto trunnion tube. in the mounting bracket.

(3) Install the upper and lower trunnion hubs on (3) Install four bolts, four washers, and four nuts.
the trunnion tube. As the nuts are tightened, jack up the suspension to seat
the trunnion hanger. Tighten nuts evenly to 90 lb.-ft.
(4) Using lifting device, position spring on upper
trunnion hub so that center bolt of spring is in recess of (4) Tighten two trunnion hanger capscrews and
trunnion hub. nuts.

5-18 Change 3
 TM 9-2330-356-14

(5) Repeat steps (2) through (4) for opposite side. (2) Connect upper and lower torque rods
(pars 5-11).
(6) Install both axles (para 5-15).
(3) Connect air lines to brake chambers as
(7) Install wheels on both axles (para 4-49). tagged.

(8) Remove supports and jacks, and lower rear (4) Install wheels (para 4-49).
end of semitrailer to ground.
(5) Remove supports and jacks.
5-14. Axle M967, M969, and M970 except M970
SN TC-0843, TC-0844, and TC-103 thru T -178).
(6) Tighten wheel nuts to proper torque and in
a. Removal (Fig. 5-3). proper sequence (pars 4-49).
5-15. Axle M967A1, M969A1, and M970A1
(1) Position semitrailer on hard, level surface including M970 SN TC-0843, TC-0844, and TC-103
with front resting on landing gear. thru TC-78).
a. Rcmoval (Fig. 5-5).

WARNING (1) Position semitrailer on hard, level surface

with front resting on landing gear.
Release air pressure from both air reservoirs
before doing any work on brake lines or other WARNING
pressurized air lines.
Release air pressure from both air reservoirs
before doing any work on brake lines or other
pressurized air lines.
(2) Release air from both air reservoirs by
opening drain cocks on bottom of reservoirs (fig. 4-79).

(3) Loosen wheel nuts while wheels are on

(2) Release air from both air reservoirs by
ground.
opening drain cocks on bottom of reservoirs (fig. 4-79).
(4) Position jacks approximately 18-inches to the
(3) Loosen wheel nuts white wheels are on
inside of lower torque rod brackets on axle. Jack up axle to
ground.
be removed until wheels are 1-inch off the ground.
(4) Position jacks just inboard of the spring end
(5) Remove wheels (para 4-49). up on axle. Jack up axle to be removed until wheels clear
the ground.
(6) Raise rear of semitrailer with an overhead
crane or A-frame support until weight of sprigs has been (5) Remove wheels (para 4-49).
removed from axle. Block frame securely (fig. 5-3).
(6) Raise rear of semitrailer with an overhead
(7) Tag and disconnect air lines from brake crane or A-frame support until weight of springs has been
chambers on axle being removed. removed from axle. Block frame securely (fig. 5-5).
(8) Disconnect upper and lower torque rods from (7) Remove brake air chambers (para 4-38).
the axle being removed (para 5-11).
(8) Remove four nuts, four washers. and four
(9) Revolve axle away from the springs until free. bolts which fasten the spring end cap to spring seat on axle.
Use a dolly jack and remove axle.
(9) Remove four nuts, four washers, and two
b. Installation (Fig. 5-3). U-bolts which fasten the spring seat on axle to the spring
end cap.
(1) Move axle into position under semitrailer.
Upper torque rod bracket on axle should be toward right (10) Remove leaf spring seats.
(curbside) of semitrailer. Position jacks approximately
18-inches to the inside of lower torque rod brackets on (11) Remove cushioning pads.
axle. Raise and revolve the axle into position on ends of
suspension springs. (12) Remove adjustment plates.

Change 3 5-19
TM 9-2330-356-14

(13) Repeat steps (8) through (12) for other side. (5) Remove jacks from under trunnion cross
tube. Raise semitrailer another 16-inches, or until there is
(14) Slowly lower axle. enough clearance to roll the bogie assembly and wheels
out from under rear of semitrailer (fig. 5-6).
b. Installation (Fig. S-S).
(6) Lower semitrailer onto supports or cribbing
(1) Move axle into position under semitrailer. after bogie assembly is removed (fig 5-3).
Raise and revolve axle into position on ends of suspension
springs.

(2) At each end of axIe, loosely install spring

seats, adjustment plates, cushioning pads, and spring end
caps with two U-bolts, four washers, and four nuts.

(3) At each end of axle, loosely install spring end

cap to spring seat on axle with four bolts, four washers, and
four nuts.

(4) Tighten all nuts evenly to 200-320 lb.-ft.

(5) Install brake air chambers (para 4-38).

(6) Install wheels (para 4-49).

(7) Remove supports and jacks.

(8) Tighten wheel nuts to proper torque and in Figure 5-6. Bogie Assembly Removed from Semi-
proper sequence (pars 4-49).
5-16. Bogie Assembly (M967, M969, and M970
except M970 SN TC-0843, TC-0844, and TC-103 b. Installation.
thru TC-178).
a. Removal. NOTE
(1) Position semitrailer on hard, level surface The upper torque rods on the front and rear
with front resting on landing gear. Raise rear of axles will be toward the right aide (curbside)
semitrailer with an overhead crane or A-frame support of the semitrailer If the bogie assembly Is
until all wheels are approximately l-inch off the ground. installed correctly.
Block the frame securely (fig. 5-3).
(1) Raise rear of semitrailer to allow bogie
assembly to roll under frame from rear. With front of
WARNING bogie assembly toward front of semitrailer, roll bogie
assembly into position under support brackets for
Release air pressure from both air reservoirs trunnion cross tube.
before doing any work on brake lines or other
pressurized air lines. (2) Lower the semitrailer to within 1-inch of the
trunnion cross tube bracket. Ensure that the holes of the
(2) Release air from both air reservoirs by support brackets are in line with holes in trunnion cross
opening drain cocks on bottom of reservoirs (fig. 4-79). tube bracket.
Tag and disconnect eight hoses from brake air chambers
(3) Install eight bolts, washers, and nuts. As you
on both axles. Manually release the fail-safe springs
tighten the nuts, jack up the trunnion cross tube brackets
(para 2-4).
to seat the support brackets. Tighten nuts to
450-650 lb.-ft. Remove jacks.
(3) Remove two upper torque rods (para 5-11).
(4) Install upper torque rods (para 5-11).
(4) Position jacks under mounting brackets of
trunnion cross tube (one jack under each bracket) to (5) Connect hoses to brake chambers as tagged.
support weight of trunnion cross tube. Remove four nuts, Manually release fail-safe springs (pars 2-4).
washers, and bolts which fasten each mounting bracket to
support bracket (fig. 5-3). (6) Remove supports and jacks.

5-20 Change 3
 TM 9-2330-356-14

5-17. Bogie Assembly M967A1, M969A1, and (8) Connect eight hoses to brake air chambers on
M970A1 including M970 SN TC-0843, TC-0844, and both axles as tagged. Manually release the fail-safe springs
TC-103 thru TC-178). (pars 2-4).
a. Removal.
(9) Remove jacks and supports, and lower
(1) Position semitrailer on hard, level surface semitrailer to ground.
with front resting on landing gear.
5-18. Engine and Pump Assembly
(2) Jack up rear of semitrailer and support under
frame securely until weight of semitrailer is removed from NOTE
springs and axles (fig. 5-5).
The engino and pump assembly is re-
(3) Release air from both air reservoirs by moved and installed as a unit power plant.
opening drain cocks on bottom of reservoirs (fig. 4-79). Removal of the complete module is neces-
sary to remove the engine.
(4) Tag and disconnect eight hoses from brake air
The pump can be removed without remov-
chambers on both axles. Manually release the fail-safe
springs para 2-4). ing the complete module.

(5) Position a jack under the trunnion tube close a. Removal (Fig 5-7).
to the inside of each trunnion hanger to support weight of
trunnion tube. (1) Disconnect negative, then positive battery
cables from batteries (l).
(6) Remove four nuts, four washers, and four
bolts which fasten the trunnion hanger to the mounting (2) Remove self-tapping screws from muffler
bracket. Repeat for opposite side. shroud (2). Remove muffler shroud.

(7) Remove jacks from under trunnion tube. (3) Remove the alternator adjusting bracket (3) .
Raise semitrailer until there is enough clearance to roll from the alternator to get clearance for removal of
the bogie assembly and wheels out from under rear of throttle cable.
semitrailer (fig. 5-5).
(4) Loosen wing screws and remove panel door
(8) Lower semitrailer onto supports or cribbing (5) on air housing. Remove throttle cable (4) (para 4-75).
after bogie assembly is removed (fig 5-5).
(5) Remove -inch oil pressure tube (7) for oil
b. Installation. pressure gage from oil adapter. Remove -inch fuel
pressure tube (6) from primary filter. Cut the tie straps,
(1) Raise rear of semitrailer to allow bogie then pull oil pressure tube and fuel pressure tube from the
assembly to roll under frame from rear. With front of engine compartment.
bogie assembly toward front of semitrailer, roll bogie
assembly into position under mounting brackets for the (6) Disconnect control panel wiring harness plug
trunnion hangers. (8) from junction box on engine frame by turning
counterclockwise with hook-type spanner wrench.
(2) Position a jack under trunnion tube as close as
possible to the inside of each trunnion hanger.
CAUTION
(3) Lower the semitrailer to within l-inch of the
trunnion hangers. Ensure that fuse has been removed first to
prevent damage.
(4) Aline holes in mounting bracket with holes in
trunnion hanger. (7) Disconnect electrical lead for hose reels
(M969, M969A1, M970, and M970A1) above and to right
(5) Install four capscrews, four washers, and four of fuse (para 4-27). Follow control panel wiring harness
nuts. As the nuts are tightened, jack up trunnion tube to disconnected above, and remove two nuts and capscrews
seat the trunnion hanger. Tighten nuts to 90 lb.-ft. securing conduit mounting plate to middle of engine
frame behind engine.
(6) Tighten two trunnion capscrews and nuts.
(8) Remove split couplings, and disconnect pump
(7) Repeat steps (4) through (6) for opposite side. inlet and outlet lines from the centrifugal pump (10).

Change 3 5-21
TM 9-2330-356-14

Figure 5-7. Engine and Pump Assembly InstaIled on Semitrailer.

(9) Remove four locknuts and capscrews

(fig. 5-8) which secure rear cross brace to engine frame.
Remove six locknuts and capscrews which fasten the
support bracket for the engine frame to the tank frame
near front of semitrailer. The support bracket should
remain on the engine frame.

(10) Position lift truck forks under engine frame to

take up the weight of the engine module. Remove
locknuts and capscrews which fasten engine module to
tank. Slowly remove module by backing the lift truck
straight away from the semitrailer.

b. Installation.

(1) Move pump and engine module into position

with forklift truck. Attach engine frame to semitrailer with
capscrews and locknuts.

(2) Attach front support bracket (fig. 5-8) to

semitrailer frame with six capscrews and locknuts. Attach
rear cross brace to engine frame with four capscrews and
locknuts. Tighten all nuts. Remove forklift truck. Figure 5-8. Engine Frame Mounting Brackets.

5-22
 TM 9-2330-356-14

(3) Install split couplings to connect pump inlet

and outlet lines to tank piping (para 4-85).

(4) Attach conduit mounting plate to middle of

engine frame with two screws and locknuts (para 4-25).
Connect wiring harness plug (8, fig. 5-7) to junction box.
Connect electrical lead for hose reels (M969, M969A1,
M970, and M970A1) to buss bar, and install cover.

(5) Install -inch oil pressure tube (7, fig. 5-7) to

oil adapter. Install -inch fuel pressure tube (6) to primary
falter.

(6) Install throttle cable (para 4-75). Install

panel door (5) on air housing. Install alternator adjusting
bracket (3) to alternator.

(7) Install muffler shroud (2) over muffler and

secure with self-tapping screws.
Figure 5-9. Engine and Pump Assembly Removed From
(8) Connect positive, then negative battery Semitrailer
cables to batteries.
(8) Remove two screws and nuts from base of
5-19. Centrifugal Pump pump. Mark the location of shims used in pump mounting.

a. Removal (Fig. 5-10). (9) Remove four capscrews and lockwashers

which fasten pump intermediate housing to engine.
(1) Remove batteries (para 4-23).
(10) Pull pump and intermediate housing straight
(2) Drain piping. Drain filter/separator (M969, away from engine and remove them through rear of
M969A1, M970, M970A1). Make sure tank is empty of frame.
fuel.
b. Installation (Fig. 5-10).
(3) Remove drain plug on bottom of pump and
drain fuel from pump. (1) Position pump and intermediate housing on
engine, alining pump half of coupling with engine half of
(4) Remove pump inlet and outlet lines pump drive coupling. Install four capscrews and
(para 4-91). lockwashers to fasten intermediate housing to engine.
Install two capscrews and nuts to secure two halves of
(5) Remove screws which fasten two halves of pump coupling (fig. 5-10).
rear firewall (fig. 5-9) to engine frame. Move the
half-sections aside to allow for removal of the pump. Do NOTE
not remove the fuel pumps or buss bar assembly from
firewall sections. If Installing same pump, use same shims In
same positions.
(6) Remove alternator (para 4-78).
(2) Position shims (fig. 5-10) under pump as
NOTE required to aline pump mounting with engine mounting to
within .03-inch. Install two screws and nuts, and tighten to
It will be necessary to turn engine crankshaft 142-158 lb.-ft.
clockwise with a socket wrench Inserted
through grille on flywheel housing to reach (3) Install pump inlet and outlet lines
both capscrews on pump coupling. (para 4-90). Use new gaskets on pump mounting flanges.

(7) Remove two capscrews and nuts from engine (4) Position half-sections of rear firewall (12 and
half of pump coupling (fig. 5-10). The engine half of pump 14, fig. 5-1 1), and fasten together and to engine frame.
coupling will remain on engine. The pump half of the
coupling will be removed with the pump. (5) Install alternator (para 4-78).

5-23
TM 9-2330-356-14

Figure 5-10. Pump Installation, 4-Inch {Also Typical of 3-Inch Pump).

(6) Install batteries and connect battery cables (2) Remove pump assembly from engine
(para 4-23). (para 5-19).

NOTE (3) Remove ten nuts (29, fig. 5-11), twenty

The pump Is self-priming. Filling the pump is washers (28), ten capscrews (27), and top panel (26).
necessary only when the pump has been
drained. (4) Tag and disconnect wiring harness and
electrical leads from engine (para 4-16).
(7) Ensure that drain plug is installed at bottom
of pump. Remove filler plug near top of pump and fill (5) Remove fuel lines from fuel tank and engine
pump with fuel that is to be pumped. Install filler plug, (para 4-73).

5-20. Engine (Fig. 5-1 1) (6) Remove air cleaner hose from engine intake
manifold (para 4-74). The air cleaner and mounting
a. Removal. bracket can be removed with the engine fan shroud.

(1) Remove engine and pump as a unit from the (7) Remove muffler and exhaust pipe
semitrailer (para 5-18). (para 4-77).

5-24
 TM 9-2330-356-14

(8) Remove two capscrews (13) and nuts (5) that b. Installation.
fasten rear firewall sections (14 and 12) to rear panel (6).

(9) Remove capscrews (9 and 8) and nuts (10) that (1) If engine was removed from base frame,
fasten panels (6 and 7) to base frame (11). fasten engine base to frame with four mounting screws
and nuts.
(10) Remove two capscrews (25), lockwashers
(24), and nuts (23) from bottom of fan shroud (22). (2) Install rear firewall sections (14 and 12), and
fasten to base frame with screws (13) and nuts (5).
(11) Using a hoist, remove panels (6 and 7),
muffler stand (1), and fan shroud (22) from base frame as
an assembly. (3) Position panels (6 and 7), muffler stand (1),
and fan shroud (22) as an assembly over engine. Position
(12) Remove remaining capscrews (13) and nuts support bracket (18) on front panel (7), and fasten to base
(5), and remove rear firewall sections (14 and 12). frame (11) with six capscrews (9) and nuts (10). Install
remaining capscrews (9 and 8) and nuts (10) to fasten
(13) The base frame can be used as a holding panels to base frame. Do not install the four capscrews (9)
fixture for the engine. If engine is to be removed from base and nuts (10) for the rear cross brace until the engine and
frame, remove four mounting screws and nuts. pump module is installed on the semitrailer (para 5-18).

Figure 5-11. Engine, Base Frame, and Attaching Parts.

5-25
TM 9-2330-356-14

(4) Install two capscrews (25), lockwashers (24), (2) Open drain valve Non sump to remove fuel
and nuts (23) to fasten fan shroud (22) to base frame. and sediment from filter/separator. Also remove drain
plugs on bottom of filter/separator.
(5) Fasten rear firewall sections (14 and 12) to
rear panel (6) with two screws (13) and nuts (5). (3) Tag and disconnect four lines from filter
separator (fig. 5-12).
(6) Install pump assembly (para 5-19).
(4) Remove split couplings from inlet and outlet
(7) Install fuel lines to fuel tank and engine lines at filter/separator.
(para 4-73).
(5) Position either lift truck forks or dolly jack
(8) Install muffler and exhaust pipe (para 4-77). under filter/separator to take up weight. Use care not to
damage sump components. Remove four nuts and
(9) Install air cleaner and intake hose washers from mounting straps. Remove mounting straps
(para 4-74). and webbing. Remove filter/separator.
(10) Install wiring harness and electrical leads b. Installation.
(para 4-16).
(1) Position filter/separator at center of two
(11) Ensure that engine crankcase is filled to mounting brackets with drain valve at bottom and service
proper level with correct oil (para 4-71). port opening toward outboard side.
(12) Install top panel (26) to panels (6 and 7). (2) Position webbing on mounting straps. Install
Secure with ten capscrews (27), twenty washers (28), and mounting straps with washers and nuts. Tighten nuts to
ten nuts (29). 142-158 lb.-ft.
(13) Install engine and pump module on (3) Connect four lines for filter/separator as
semitrailer (para 5-18). tagged. Two lines for filter/separator gage are connected
(14) Install capscrews (9) and nuts (10) for the rear to elbows at front and rear of filter/separator. Fuel line is
cross brace. connected to elbow at top of filter/separator. Pilot line is
connected to control valve on sump.
5-21. Filter/Separator (M969, M969A1, M970, and
M970A1) (Fig. 5-12) (4) Install split couplings to connect
filter/separator inlet and outlet to tank piping (para 4-85).
a.. Removal. Tighten two bolts on split couplings to 95-105 lb.-ft.

(1) Close valve M on curbside of semitrailer. (5) Close drain valve N and open valve M.

Figure 5-12. Filter/Separator Installation (M969, M969A1, M970, and M970A1).

5-26
 TM 9-2330-356-14

5-22. Hose Reel Cabinet (M969, M969A1, M970, (b) Disconnect the control cable from the
and M970A1) trip bar on the top left side of the cabinet (fig. 5-13).
NOTE (c) Remove the cabinet door and frame by
The hose reel cabinet must be removed to removing the ten capscrews, flatwashers, and self-locking
remove the hose reels. nuts. Two people will then be able to lift the door and
frame off.
Tag all lines as they are disconnected for
ease of installation. (d) Disconnect three lines on the parking
a. Removal. brake control valve (para 4-47).

(1) Position semitrailer on level surface with (e) Disconnect line to deadman hose reel.
front resting on landing gear.
(f) Disconnect line to the flow control
(2) Open valves and drain piping in cabinet area. valve.
(3) Disconnect the negative cables from (g) Pull disconnected lines through the hole
batteries. in the rear of cabinet.
(4) Disconnect the lead inside the electrical
junction box on the rear of the cabinet (para 4-27). (7) On the M969 and M969A1, disconnect the
two meter inlet pipes by removing the split couplings from
(5) Disconnect the conduit at the electrical inside the cabinet. On the M970 and M970A1, disconnect
junction box on the rear of the cabinet (para 4-27). the meter inlet pipe by removing the split coupling from
(6) On the M970 and M970A1 only, perform the outside the rear of cabinet.
following steps:
(8) On the M969 and M969A1, remove the
(a) Disconnect the line that runs to the cabinet door and frame by removing the ten capscrews,
accumulator (fig. 4-151). This can be done at a fitting at washers, and self-locking nuts. Two people will then be
the rear of the cabinet. Pull line into the cabinet. able to lift the door and frame off.

Figure 5-13, Hose Reel Cabinet (M970 and M970A1).

5-27
TM 9-2330-356-14

(4) Thread lead to the inside of the junction box

WARNING
on rear of cabinet.

Ensure that forklift is properly positioned (5) On the M970 and M970A1, do the following
under cabinet. The entire weight of the (fig. 5-13):
cabinet is now on the forklift. Failure to follow
this warning may result In cabinet falling and (a) Thread disconnected lines through the
injuring personnel. hole at the rear of cabinet.

(9) Position a forklift and lift the cabinet slightly (b) Connect line to the flow control valve.
to relieve pressure on the mounting screws and nuts.
(c) Connect line to the deadman hose reel.
(10) Remove eighteen mounting screws and
self-locking nuts (7, top left side; 8, top right side; and 3, (d) Connect three lines to the parking brake
bottom left side). control valve (para 4-47).

(e) Install cabinet door and frame assembly.

CAUTION Attach frame to hose trough and cabinet hose with ten
capscrews, flatwashers, and self-locking nuts.
Before removing the cabinet, ensure that all (f) Connect the control cable to the trip bar
disconnections have been made. on the top, left side of the cabinet.

(11) Lower the cabinet slightly and pull the lead (g) Connect the line that runs to the
from the junction box at the rear of the cabinet. accumulator (fig. 4-151).

(12) Remove cabinet. (6) Connect the conduit to the junction box,

(7) Connect the lead to the inside of the junction

b. Installation.
box on the rear of the cabinet (para 4-27).

(8) Connect negative battery cables to batteries.

WARNING
(9) Operate dispensing equipment and check for
Ensure that forklift is properly positioned leaks (table 2-1).
under cabinet. The entire weight of the
cabinet is now on the forklift. Failure to follow 5-23. Hose Reel Assembly-2-inch (Fig. 5-14)
this warning may result In cabinet falling and
Injuring personnel. a. Removal.

NOTE NOTE
Ensure that all lines are connected as tagged. The 2-inch hose reel, hose reel motor, and
electrical junction box will be removed as a
(1) Position a forklift under the hose reel cabinet. unit in this procedure.

(2) Position hose reel cabinet under semitrailer (1) Remove hose reel cabinet from semitrailer
and fasten with eighteen capscrews and self-locking nuts (para 5-22).
(7, top left side; 8, top right side; and 3, bottom left side).
Remove forklift. (2) Remove 2-inch hose from reel by releasing
quick disconnect coupling.
(3) On M969 and M969A1, install split couplings
to connect both inlet piping to meter inlet tubes (3) Remove cover from motor junction box
(para 4-85). On M970 and M970A1, install split coupling (fig. 5-14).
behind hose reel cabinet to connect inlet piping to meter
inlet tube. Tighten split coupling capscrews to (4) Tag and disconnect leads that enter from the
95-105 lb.-ft. top and bottom of the box.

5-28
 TM 9-2330-356-14

Figure 5-14. Hose Reel Cabinet, (M970 and M970A1) Roadside View.

CAUTION (2) Replace four mounting screws, nuts, and

washers. Do not tighten mounting screws until valve R is
fitted into place.
Do not disconnect the motor junction box
from the motor. Nipple is specially packed for
explosion resistance. NOTE
Hose reel will slide slightly from side to side to
allow room for valve R.
(5) Disconnect conduit at the top and bottom of
the junction box.
(3) Fit valve R and two split couplings in place
between hose reel and meter (para 4-85).
(6) Remove valve R.
(4) When valve R is in place, tighten mounting
(7) Remove pilot fuel flow line (fig. 5-14). Have screws and nuts to 20-35 lb.-ft.
a container ready to catch the flow when disconnection is
made. (5) Tighten split coupling to 95-105 lb.-ft.

(6) Connect pilot fuel flow line (fig. 5-14) to hose

(8) Remove four mounting screws, nuts, and reel inlet.
washers on bottom of hose reel assembly.
(7) Connect leads and conduit to motor junction
(9) Two people can now lift the hose reel, motor, box as tagged. .
and motor function box from the cabinet.
(8) Install cover on junction box.
b. Installation.
(9) Install hose on hose reel.

(1) Have two people lift the hose reel assembly (10) Install hose reel cabinet to semitrailer
back into cabinet. (para 5-22).

5-29
TM 9-2330-356-14

5-24. Hose Reel Assembly- 1-inch and 1 -inch (3) Connect electrical leads and conduit to motor
(Figs. 5-14 and 5-15) junction box as tagged. Install cover on junction box.
a. Removal. (4) Install hose assembly on hose reel
(para 4-89).
(1) Remove hose reel cabinet from semitrailer
(para 5-22). (5) Install hose reel cabinet to semitrailer
(para 5-22).
(2) Remove hose assembly from hose reel using a
pipe wrench or spanner wrench (para 4-89). 5-25. Meter Assembly (M969 and M969A1)
(Fig. 5-1 5)
(3) Remove cover on motor junction box. Tag and
a. Removal.
disconnect electrical leads and conduit from motor
junction box. (1) Remove split couplings on meter inlet and
outlet lines. Slide the coupling gaskets towards the meter
(4) Remove split coupling to disconnect hose reel to expose the joint in the piping.
from meter (M969 and M969A1) or gate valve P (M970
and M970A1). (2) From under cabinet, remove three mounting
screws. Use a suitable lifting device and remove meter.
(5) Remove mounting screws, washers, and nuts.
TWO people can then lift the hose reel from the cabinet. (3) Remove flanged connections from meter
inlet and outlet after meter is removed from cabinet.
b. Installation. Discard gaskets from flanges.
(1) Have two people position hose reel in b. Installation.
cabinet. Install mounting screws, washers, and nuts.
Tighten nuts to 25-35 lb.-ft. (1) Use new gaskets, and install flanged
connections on inlet and outlet ports of meter. Tighten
(2) Install split coupling (para 4-85). Tighten four nuts on each flange to 50-75 lb.-ft. Install gaskets for
coupling to 57-63 lb.-ft. split couplings.

Figure 5-15. Hose Reel Cabinet Assembly, (M969 and M969A1) Roadside View.

5-30
 TM 9-2330-356-14

(2) Position meter assembly in cabinet. Ensure c. Installation.

that spacers are in position under meter. Install three
mounting screws and washers from under cabinet. (1) Observe all applicable warning/safety
precautions (inside front cover and safety summary).
(3) Install split couplings (para 4-85). Tighten
couplings to 57-63 lb.-ft. (2) Refer to paragraph 4-85 for general
information on maintenance of dispensing equipment.
5-26. Aqua-Glo Probe and Adapter Installation
(M969 and M969A1) (3) Close meter shut-off valves P or R, and drain
fuel from fuel hoses (fig. 5-15).
a. General.
(4) Scribe location of opening to be drilled in
meter outlet nipple approximately 3-inches from the
(1) The Aqua-Glo probe and adapter may be flanged end on a 45 angle (fig. 5-16).
installed on the meter outlet nipple
.. of either meter
(fig. 5-15). (5) Remove meter outlet nipple (para 5-25) and
flush thoroughly with water to eliminate fumes.
(2) The installation provides a port downstream
of the filter/separator to draw fuel samples for water (6) Fabricate ferrule from aluminum rod
(Aqua-Glo) test. 6061-6063 (fig. 5-17).

(3) Refer to TM9-237 for information on welding (7) Drill a -inch diameter hole in the meter
procedures to be followed. outlet nipple as described in step (4).

b. Materials and Parts. (8) Insert ferrule into meter outlet nipple
approximately -inch. This will allow the assembled
(1) Probe and adapter assembly, NSN 4930-01- probe to extend approximately halfway into the meter
013-7589. outlet nipple (fig. 5-18). Weld ferrule in place.

(9) Install meter outlet nipple (para 5-25).

(2) Aluminum rod, alloy, 6061-6063, for fabrica-
tion of ferrule. (10) Use thread sealing compound and install
Aqua-Glo probe and adapter. Tighten until the probe
(3) Aluminum welding rod compatible with alu- angle is in line with direction of flow (fig. 5-18).
minum alloy, 6061-6063.
(11) Check for fuel leaks. No leaks are permitted.
(4) Thread sealing compound, NSN 8030-01-
009-2590. (12) Paint adapter and reworked areas.

Figure 5-16. Location of Ferrule on Meter Outlet Nipple.

5-31
TM 9-2330-356-14

Figure 5-17, Fabrication Instructions for Ferrule.

(2) Remove four mounting screws and nuts,

Remove meter.

(3) Flanged nipples on meter inlet and outlet

ports can be removed after meter is removed from
cabinet.

b. Installation.

(1) Use new gaskets. Install flanged nipples on

outlet ports of meter. Fasten flange to meter with four
capscrews and lockwashers. Tighten capscrews to
50-75 lb.-ft.

(2) Put new gasket over studs on meter inlet port.

Position meter in cabinet and connect to inlet piping with
four self-locking nuts. Tighten nuts to 50-75 lb.-ft. Install
four screws, flatwashers, and self-locking nuts to fasten
meter to cabinet. Tighten to 67-74 Ib.-ft.

(3) Install split couplings (para 4-85). Tighten

2-inch coupling to 57-63 Ib.-ft. Tighten 3-inch coupling to
95-105 lb.-ft.
Figure 5-18. Probe Assembly Installed in Meter 5-28. Deadman Hose Reel (M970 and M970A1)
Outlet Nipple. (Fig. 5-19)

5-27. Meter Assembly (M970 and M970A1) a. Removal.

(Fig. 5-1 4)
(1) Deactivate deadman system per instructions
a. Removal. on plate inside hose reel cabinet.

(2) Remove meter assembly (para 5-27) and

(1) Remove split couplings from nipples on both valve R (fig. 5-14) for access to deadman hose reel.
sides of meter. Slide the coupling gaskets onto pipe ends
away from the meter. At rear of meter, remove four nuts (3) Disconnect air lines from ports on both sides
from studs on meter inlet. of hose reel (para 4-89).

5-32
 TM 9-2330-356-14

(4) Remove four mounting capscrews, washers,

and nuts from base of hose reel. Use a suitable lifting
device and remove hose reel from reel stand.

b. Installation.

(1) Position hose reel on reel stand. Loosely

install four mounting screws, washers, and nuts. Do not
tighten until valve R is in place.

(2) Connect air lines to hose reel (para 4-89).

(3) Install valve R (fig 5-14) and meter assembly

(para 5-27).

(4) Tighten mounting nuts to 25-35 lb.-ft.

Figure 5-19. Deadman Hose Reel (M970 and M970A1).

5-33/(5-34 Blank)
 TM 9-2330-356-14

CHAPTER 6
REPAIR OF FRAME AND BODY PARTS

Section I. GENERAL

6-1. scope 6-2. Reference

a. Safety. Ensure that all safety precautions listed in

This chapter contains instructions for repair and
the Warning Summary are followed while performing
replacement of frame and body parts, including the bogie maintenance. Pay close attention to all WARNINGS and
assembly, which are beyond the scope of the using CAUTIONS.
organization. These repairs, with the exception of repairs
to tank body or main frame, are allocated to direct support b. Procedures. Procedures for repairs involving
maintenance. Particular attention must be given to proper welding, surface preparation, cleaning, and painting are
purging of the tank before repairs are made (Chapter 4, included under General Maintenance Procedures
Section XX). (para 5-8).

Section Il. BODY ASSEMBLY AND SUSPENSION

6-3. Spring Seat Bearings, Wiper and Seals area. Avoid contact with akin, eyes, and
M967, M969 and M970 except M970 SN TC-0843, clothes, end DO NOT breathe vapors. DO
TC-0844, and TC-103 thru T-178). NOT use near open flame or excessive heat
a. Disassembly. The solvents flash point is 100F-138F
(38C-59C). If you become dizzy while
(1) Remove suspension spring (para 5-12). using cleaning solvent immediately get fresh
air and medical help. if solvent contacts eyes,
(2) Remove six screws (1) and washers (2) from immediately wash your eyes with water and
cap (3). Remove cap and gasket (4). get medical aid.

(3) Remove jam nut (5), key washer (6), and (1) Clean spring seat, spindle of trunnion cross
bearing adjusting nut (8) from end of trunnion cross tube tube, and bearings with dry cleaning solvent (item 11,
(30). Appendix E). Use soft bristle brush to remove old
lubrication.
(4) Tap the spring seat with a soft hammer to
loosen outer bearing cone (9). Remove the bearing cone (2) Inspect seat for cracks or damage. Inspect
and spring seat (12). Inner bearing cone (16) and seal bearing cups and replace if worn, pitted, or scored.
assembly (17) will remain in seat. With offset screwdriver,
pry seal assembly out of spring seat. Remove inner bearing (3) Apply thin coating (not over 1/16-inch thick) of
cone. Do not remove packing retainer (18), felt seals, seal grease (item 17, Appendix E) to inside of seat and to
retaining washer, or wiper seal from trunnion cross tube spindle of tube.
unless damaged.
(4) Inspect bearing cones for serviceability and
(5) If bearings are being replaced, use a bearing lubricate as specified in Section I of Chapter 3.
puller or a hammer and punch to remove bearing cups (10
and 15) from spring seat. The bearing cone and cup must (5) Inspect oil seal (17) for damage or lack of
always be replaced as an assembly. pliability of sealing material.

b. Cleaning and Inspection. c. Assembly (Fig. 6-1).

(1) Install packing retainer (18), oil seal (19), and

WARNING wiper (20) onto trunnion cross tube (30) if removed during
disassembly.
Dry cleaning solvent P-D-680 is toxic and
flammable. Always wear protective goggles (2) If bearing cups (10 and 15) were removed,
and gloves, and use only in a well-ventilated press new cups into spring seat.

Change 3 6-1
TM 9-2330-356-14

Figure 6-1. Spring Seal and Trunnion Cross Tube Assembly (M967, M969, and M970 except
M970 SN TC-0843, TC-0844, and TC-103 thru TC-178).
(3) Position inner bearing cone (16) in spring seat (7) Install gasket (4) and cap (3). Secure cover
and press seal assembly (17) into position. Use wooden with six screws and washers.
block or discarded seal to press seal squarely into place.
(8) Install suspension spring (para 5-12).
(4) Slide spring seat (12) onto trunnion cross tube 6-4. Trunnion Cross Tube M967, M969, and
(30). Hold seat level with tube. With a rocking motion, M970 except M970 SN TC-0843 , TC-0844, and TC-
push seat carefully into position so seat slides over packing 103 thru T-178) (Fig. 6-1).
retainer (18) and oil seal (19) slips over wiper (20) without a. Removal.
damage. Seat should cover retainer when fully positioned.
(1) Remove spring and spring seat (para 6-3). Do
this at both ends of trunnion cross tube.
(5) Install outer bearing cone (9) and bearing
adjusting nut (8). Tighten nut to approximately 25 lb.-ft. to (2) Remove screw (28) washer (27} and
ensure that bearings seat properly. Back off nut until seat self-locking nut (26) securing trunnion cross tube to
can be rotated by hand but without noticeable lateral mounting bracket (22) on both ends of tube.
movement.
(3) Remove torque rods (para 5-11) from
mounting bracket (22) on one end of trunnion cross tube.
(6) Install keywasher (6) on spindle of tube so pin Remove four screws (25), washers (24), and nuts (23).
(7) in bearing adjusting nut (8) engages hole in washer. If Remove mounting bracket (22).
adjustment is not satisfactory, slide washer outward and
turn nut to engage next hole in washer. Install bearing jam (4) Remove trunnion cross tube from opposite
nut (5), tighten, and check bearing adjustment again. mounting bracket.

6-2 Change 3
 TM 9-2330-356-14

b. Inspection and Repair. tube with hole in mounting bracket, and install retaining
screw (28), washer (27), and self-locking nut (26).
(1) Inspect spindle ends on trunnion cross tube
for damaged threads, pitting, scoring, or wear on finished (2) Install mounting bracket (22), and fasten to
surfaces. Hand chase the threads to remove minor support bracket with four screws (25) washers (24), and
damage or burrs. nuts (23). Tighten to 450-650 lb.-ft. Install retaining screw
(28), washer (27), and self-locking nut (26).
(2) Use straightedge and check for bends in the (3) Install torque rods on mounting bracket
trunnion cross tube. Replace the tube if not serviceable. (para 5-11).
(3) Check that plugs (29) are installed in both (4) Install spring seat and spring (para 6-3).
ends of tube.
6-5. Trunnion Cross Tube (M967A1, M969A1,
and M970A1 including M970 SN TC-0843, TC-
c. Installation. 0844, and TC-103 thru TC-178) (Fig. 6-2).
a. Removal. Refer to paragraph 5-13.
(1) Insert one end of trunnion cross tube into
mounting bracket attached to semitrailer. Aline hole in b. Installation. Refer to paragraph 5-13.

Figure 6-2. Spring Seal and Trunnion Cross Tube Assembly (M967A1, M969A1, and M970A1
including M970 SN TC-0843, TC-0844, and TC-103 thru TC-178).

Change 3 6-3
TM 9-2330-356-14

Section III. BRAKES AND BRAKE SYSTEM COMPONENTS

6-6. Brake Shoes (Fig. 6-3) to shoe clearance is excessive if gage can be inserted
between shoe and lining.
a. Disassembly.

WARNING

Due to asbestos hazard, do not grind off rivet

heads. Failure to follow this warning may re-
sult in injury or death to personnel.

(1) Punch rivets out from back side of shoe using

a hammer and a drift or punch.

(2) Remove linings from brake shoes.

b. Inspection and Repair.

(1) Oil or grease saturated linings are not

reusable. Saturated linings indicate leakage in the axle
shaft seals.

(2) Grooving or uneven wear in brake linings in-

dicates a need for refacing or replacement of brake drum. Figure 6-3. Brake Lining Riveting Sequence.

(3) Inspect brake shoe for distortion, cracks or 6-7. Brake Drums
damage. Replace the brake shoe if these conditions are
found. Lining and shoe contact surfaces should be clean a. Removal. Refer to paragraph 4-49.
and smooth.
b. Reboring of Brake Drums.
(4) Use new rivets of the correct body diameter,
head size and shape, length, and material. (1) Reboring is not recommended due to reduced
strength of refaced drums. If it is necessary to rebore a
c. Assembly. drum, remove as little metal as necessary to true the
friction surface.
NOTE
Do not use combination linings. (2) If reboring requires removal of more than
1/16-inch of material, replace the drum.
(1) Make sure lining and shoe contact surfaces c. Installation. Refer to paragraph 4-49.
are clean.
6-8. Brake Air Chamber M867, M969, and
(2) Clamp lining to brake shoe with C-clamps M970 except M970 SN TC-0843, TC-0844, and TC-
with rivet holes in both pieces alined. 103 thru T -178) (Standard) (Fig. 6-4).

a. Removal. Refer to paragraph 4-37.

(3) Drive the rivets squarely into the holes with a
7/16-inch flat head drift. Disassembly.
b.
(4) Position the C-clamps as close to the rivet
holes as possible and make certain the lining is tight (1) Remove nut (2) and bolt (1) from clamp ring
against the shoe. (3). Spread the clamp ring and remove it from the air
chamber.
(5) Working from heel to toe of brake shoe, form
the rivet heads with the correct tubular rivet set. Follow (2) Hold diaphragm (5) to non-pressure housing
the order shown in figure 6-3. (8) and remove pressure housing (4).

(6) Check lining installation with a 0.002-inch (3) Carefully remove the diaphragm (5) from the
feeler gage to ensure that lining and shoe contact. Lining non-pressure housing (8).

6-4 Change 3
 TM 9-2330-356-14

d. Inspection and Repair.

(1) Inspect wedge guide (7) for damage or wear.

If wedge guide is worn more than 25% of its thickness,
replace it.

(2) Check tube on non-pressure housing for pits,

grooves, or stripped threads. Replace housing if damage is
found.

(3) Inspect and replace diaphragm if it is tom or

cracked, or if rubber at sealing edge has become set or
distorted.

(4) Inspect diaphragm plate for bent push rod or

worn or cracked boot. Replace if not serviceable.

e. Assembly.

(1) Install wedge guide (7) all the way onto end of
push rod of diaphram plate (6).

(2) Install collet nut (9).

Figure 6-4. Brake Air Chamber (M967, M969, (3) Clean non-pressure housing (8) with cement
and M970 except M970 SN TC-0843, TC-0844, thinner or similar material in area where boot on
and TC-103 thru TC-178) (Standard). diaphragm plate is to be cemented. Apply cement to
housing around tube end, then insert the diaphragm plate
(4) Remove diaphragm plate (6) and wedge guide and push rod assembly into tube. Press boot into position
(7) from non-presure housing (8). for cementing. Screw non-pressure housing (8) in place.

(5) Unscrew collet nut (9). (4) Install new diaphragm (5) over plate and onto
non-pressure housing.
(6) Unscrew non-pressure housing (8).
(5) Install pressure housing (4), and secure with
clamp ring (3), bolt (1) and nut (2).
c. Cleaning.
f. Installation. Refer to paragraph 4-37. Test for
leakage after installation by making full brake application
WARNING and applying soapy water around clamp ring and
connections.
Dry cleaning solvent P-D-680 is toxic and
6-9. Brake Air Chamber M967, M969, and
flammable. Always wear protective goggles M970 except M970 SN TC-0843, TC-0844, and TC-
and gloves, end us. only in a well-ventilated 103 thru T -178) (Fail-Safe Unit) (Fig. 6-5).
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO a. Removal. Refer to paragraph 4-39.
NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F b. Disassembly.
(38C-59C). If you become dizzy while
using cleaning solvent, Immediately get fresh (1) Remove nut (5) and bolt (4) from clamping
air and medical help. If solvent contacts eyes, ring (6). Spread the clamping ring and remove from air
immediately wash your eyes with water end chamber.
get medical aid.
(2) Carefully separate the fait-safe unit (1) from
the non-pressure housing (8). DO NOT disassemble the
(1) Clean metal parts with dry cleaning solvent fail-safe unit. No repairs are authorized for this assembly.
(item 11, Appendix E).
(3) Carefully remove diaphragm (2) from
(2) Clean diaphragm with mild soap solution. non-pressure housing (8).

Change 3 6-5
TM 9-2330-356-14

e. Assembly.
(1) Perform steps 1 through 4 under para-
graph 6-8.

(2) Assemble fail-safe unit (1) to non-pressure

housing, and secure with clamp ring (6), bolt (4), and nut
(5).

f. Installation. Refer to paragraph 4-39. Test for

leakage after installation by making full brake application
and applying soapy water around clamp ring and
connections.
6-10. Non-adjusting Brake Plunger M967
M969, and M970 except M970 SN TC-843, TC-
0844, and TC-103 thruTC-178) (Fig. 6-6).
a. RemovaI. Refer to paragraph 4-36.

b. Seal Replacement.

(1) Pry or cut old seal from plunger. Use care not
to damage plunger.

(2) Apply film of grease (item 17, Appendix E) to

Figure 6-5. Brake Air Chamber (M967, M969, and inside surfaces of new seal assembly.
M97O except M970 SN TC-0843, TC-0844, and TC-103
thru TC-178) (Fail-Safe Unit). (3) Put apiece of masking tape over slot for brake
shoe web in plunger to protect seal during installation.
(4) Remove diaphragm plate (3) and wedge guide (4) Carefully push the double-lip seal assembly
(7) from housing. onto the plunger. The outer seal lip must be stretched
over nose of plunger. Continue to push on seal until inner
(5) Remove collet nut (9). seal is completely in the second plunger groove and outer
seal lip is in the first plunger groove.
c. Cleaning. Refer to paragraph 6-8.
(5) Remove masking tape from plunger nose.
d. Inspection and Repair. Refer to paragraph 6-8. c. Installation. Refer to paragraph 4-36.

Figure 6-6. Installing Seal on Non-Adjusting Plunger

6-6 Change 3
 TM 9-2330-356-14

Section IV. FRAME AND BODY PARTS

6-11. Frame, Bumpers, and Brackets 6-14. Control Panel Assembly

a. Repair. a. Removal.

(1) Observe all applicable safety precautions (1) Remove all gages, controls, and instruments
listed in the Warning Summary if the possibility of creating from control panel assembly (para 4-24).
sparks exists. (2) Remove panel mounting screws and panels.
(2) All repairs should be done outside where b. Repair. If control panel cannot be repaired by
adequate ventilation and circulation of air will prevent straightening or welding, replace the control panel.
fuel vapor accumulation.
c. installation.
(3) Repair of minor damage such as straightening
of bent or dented parts can be accomplished with a pry bar (1) Position control panel on semitrailer and
or anvil and heavy hammer. install mounting screws.

b. Replacement. Frame and body parts that are (2) Install decals, gages, instruments, and
integral parts of the semitrailer require replacement of controls (para 4-24).
the next higher assembly (TM 9-2330-356-24P). 6-15. Hose Real Cabinet (M969, M969A1, M970,
and M970A1)
6-12. Hose Troughs
a. Removal. Refer to paragraph 5-22.
a. Repair. Repairs are limited to straightening and
removal of dents (para 6-11). b. Repair. Straighten bent or dented metal. Repair
cracks by welding (TM 9-237).
b. Replacement. The hose troughs are welded to the
tank and require replacement of the next higher assembly c. Installation. Refer to paragraph 5-22.
(TM 9-2330-356-24P).
6-16. Cabinet Door (M969, M969A1, M970, and
M970A1 ) (Figs. 6-7 and 6-8)
6-13. Piping Control Cabinet
a. Removal. Remove cabinet door (para 5-22).
a. Removal.
b. Repair.
(1) Refer to paragraphs 4-84,4-85, and 4-91, and
remove piping and valves inside cabinet. (1) The door hinge is tack welded to the door
frame. Break the tack weld with a steel chisel and grind
(2) Remove hose reel cabinet (M969, M969A1, surfaces smooth.
M970, and M970A1) (para 5-22).
(2) Attach new door to door frame by tack
(3) Position lift truck forks or dolly jack under welding in same locations as original welds.
piping control cabinet to take up weight. Remove cabinet
c. Replacement of Latching Cable (M970 and
mounting screws and nuts and remove cabinet.
M70A1).
b. Repair. Straighten bent or dented metal. Repair (1) Loosen cable clamps at ends of cable, and pull
cracks by welding (TM 9-237). cable from latches and guides.

c. Installation.
WARNING
(1) Position cabinet under semitrailer and install
mounting screws and nuts. DO NOT use an acetylene torch to fuse cable
ends unless tank has been cleaned and
(2) Install hose reel cabinet (M969, M969A1, purged. Failure to follow this warning may
M970, and M970A1) (para 5-22). result in serious injury or death to personnel.

(3) Install valves and piping (para 4-84,4-85, and (2) Before installing new cable, fuse the cable
4-91). ends with an acetylene torch to prevent unraveling.

6-7
 TM 9-2330-356-14

Figure 6-7. Hose Reel Cabinet Door Assembly (M970 and M970A1).

(3) Install cable through the guides and latches, e. Replacement of Door Spring (M970 and M970A1).
and secure with cable clamps. Adjust length of cable to
ensure full release and engagement of both latches.
(1) Remove cotter pin (14) and washer (15) from
d. Replacement of Trip Bar (M970 and M970A1). one end of pin (17). Remove pin (17) from spring (16).
Repeat at other end of spring (16).
(1) Remove nut (6), washer (5), screw (1), washer
(2), trip bar (3), and washer (4). (2) Aline spring (16) in either door or frame
bracket. Push pin (17) through spring (16) and bracket,
(2) Assemble screw (1), washer (2), trip bar (3),
and washer (4). Secure with washers (15) and cotter pins (14). Repeat at
other end of spring (16).
(3) Push screw (1) through hole in frame (7) and
secure with washer (5) and nut (6). f. Installation. Install cabinet door (para 5-22).

6-8
 TM 9-2330-356-14

Figure 6-8. Hose Reel Cabinet Door Assembly (M969 and M969A1).
6-17. Landing Gear Leg (2) Drive out the two roll pins (2 and 3) from
pinion shaft (4).
a. Removal. Remove the leg assembly (para 4-54). (3) Drive out pinion shaft (4) from upper leg (5),
being careful not to damage the two seals (6).
b. Disassembly (Fig. 6-9).
(4) Pinion gear (7) and washer (8) will now be
(1) Pry under cover (1) and remove cover. free. Remove these two parts.

6-9
TM 9-2330-356-14

(10) Remove ring seal (16) from lower leg.

c. Cleaning, Inspection, and Repair.

WARNING

Dry cleaning solvent P-D-680 Is toxic and

flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat.
The solvents flash point Is 100F-138F
(38C-590C). If you become dizzy while
usingcleaning solvent, Immediately get fresh
air and medical help. if solvent contacts eyes,
immediately wash your eyes with water and
get medical aid.

(1) Clean all metal parts in dry cleaning solvent

(item 11, Appendix E) and dry thoroughly.

(2) Inspect the thrust bearing. Replace corroded

or pitted bearing. Revolve bearing slowly by hand. Replace
bearing which has rough or tight spots.

(3) Inspect all gears for nicked, cracked, scored,

broken, or worn teeth. Remove burrs or nicks from gear
teeth with a soft honing stone or crocus cloth (item 4,
Appendix E). Replace badly damaged or worn gears.

(4) Inspect seals for damage. Replace worn or

damaged seals.

d. Assembly (Fig. 6-9).

(1) Install ring seal (16) onto lower leg (10).

(2) Install screw bushing (15) and thrust bearing

(14) onto shaft of lower leg. Coat bearing with grease
(item 11, Appendix E).

(3) Slide lower leg into upper leg until thrust

Figure 6-9. Landing Gear Leg. bearing (14) is seated against internal bracket inside of
upper leg.
(5) Remove locknut (9) from shaft on lower leg
(10). (4) Install screw bushing (13) onto shaft of lower
leg.
(6) Using a puller, remove bevel gear (11) and (5) Install bevel gear onto shaft and aline key
key (12). ways. Install key (12).

(7) Remove screw bushing (13). (6) Push pinion shaft (4) through seal (6) until it
protrudes into the upper leg. Install washer(8) and pinion
gear (7) onto the pinion shaft. Push shaft through other
(8) Secure upper leg (5) and pull lower leg (10) seal (6).
from upper leg.
(7) Aline holes in pinion shaft and pinion gear,
(9) Remove thrust bearing (14) and screw and install roll pin (3). Be sure pinion gear(7) meshes with
bushing (15) from shaft on lower leg. the bevel gear (11).

6-10
 TM 9-2330-356-14

(8) Slide washer (8) up against bushing inside (4) On M970, M970A1 only, loosen the U-bolt
upper leg, and install roll pin (2). connection securing cable to cabinet door shut-off lever.
Remove cable.
(9) Coat grease (item 17, Appendix E) heavily on
pinion and bevel gear teeth. (5) Pull cables through cable guides and remove
(10) Apply a continuous 1/8-inch diameter bead of cables.
adhesive to inside of cover (1). Install cover (1) to upper b. Installation.
leg (5).
(1) Slide nut (3) over one end of the 120-inch
e. In.stallation. Install landing gear leg (para 4-54).
cable. Insert end of cable into end of adjusting bolt (4) and
6-18. Emergency Valve Control Cables (Fig. 6-10) tighten nut onto adjusting bolt.
a. Removal. (2) Thread cable through cable guide on cabinet
and U-bolt connection on emergency valve.
(1) Remove nut (3) and loosen u-bolt
connections (9) securing cable(s) 10 valve operator A. (3) Adjust cable (para 4-51).
Remove cables.
(4) Connect the 168-inch cable to U-bolt
(2) Loosen U-bolt connection securing cable to connection on valve operator A.
emergency valve.
(5) Thread cable through cable guides and
(3) Loosen U-bolt securing control cable to connect to emergency valve shut-off.
emergency valve shut-off on curbside of trailer and
remove cable. (6) Adjust cable (para 4-51).

Figure 6-10. Emergency Valve Control and Cables.

6-11
TM 9-2330-356-14

(7) On the M970 and M970A1 only, connect the attempt to inspector repair tank until it has been drained
75-inch cable to the U-bolt connection on valve operator and purged (Chapter 4, Section XX).
A.
b. Inspection. Inspect tank for leaks, punctures, or
(8) Thread cable through cable guide on cabinet dents.
and connect cable to hose reel cabinet door shut-off.
(9) Adjust cable (para 4-51). c. Repair. Straighten dented metal with rubber
mallet or a block of wood and heavy hammer. Repair
(10) Cut excess cable 1-inches from all U-bolt cracks by welding (TM 9-237).
connect ions.
6-20. Alternator Drive Belt (M967, M969, and
M970)
WARNING
a. Removal (Pig. 6-11).
Do not use an acetylene torch to fuse cable
ends unless tank has been cleaned and (1) Remove alternator (para 4-78).
purged. Failure to follow this warning may
result in serious Injury or death to personnel. (2) Check pulley in pump intermediate housing
to ensure that the two bolts attaching flex plates to pulley
(11) Unless the tank has been cleaned and purged are accessible for removal. If bolts cannot be removed,
for other maintenance, crimp the cable ends to keep them remove center plug from engine grille (fig. 6-12). Use a
from unraveling. DO NOT fuse them unless tank has been 5/8-inch socket on a long extension, and insert it through
purged. the hole and onto fan bolt. With a socket wrench, turn
6-19. Tank Components engine clockwise until bolts can be removed.

a. Cleaning and Purging. Observe safety precautions (3) Remove two bolts and four washers holding
given in the Warning Summary at front of manual. Do not flex plates to pulley.

Figure 6-11. Removal of Alternator Drive Belt (M967, M969, and M970).

6-12
 TM 9-2330-356-14

(4) Using the 5/8-inch socket, extension, and (4) Turn engine clockwise until the remaining
socket wrench, turn engine clockwise until the two two bolts and four washers can be installed.
remaining bolts can be removed.
(5) Apply thread sealant to two remaining bolts,
(5) Remove the two remaining bolts and washers. and install two bolts and four washers. Tighten bolts to
25 lb.-ft.
(6) Using alternator belt, lift pulley out of
intermediate housing and remove belt. (6) Install alternator drive belt over alternator
pulley.

(7) Install alternatorand adjust drive belt tension

(para 4-78).

6-21. Buss Bar

a. Removal. Refer to paragraph 4-81.

b. Replacement of Fuse Clip (Fig. 6-13).

(1) Use a bench grinder to remove crimped end

of rivet.

(2) Use a hammer and punch to drive rivet from

buss bar and fuse clip.

(3) Install fuse clip to the buss bar with a rivet.

Use a rivet punch to install rivet.

c. Installation. Refer to paragraph 4-81.

Figure 6-12. Turning Engine in Crankshaft Clockwise
Direction.

b. Installation (Fig. 6-11).

(1) Position alternator drive belt on pulley.

(2) Position pulley and belt in intermediate

housing between the two hubs.

CAUTION

Be sure curved side of washers are against

flex plates. Bolts holding pulley to flex plates
must be tightened to 25 Ib.-ft.

(3) Apply thread sealant to two holes, and install

two bolts and four washers to hold flex plates to pulley.
Tighten bolts to 25 lb.-ft. Figure 6-13. Installing Fuse Clip.

6-13/(6-14 Blank)
 TM 9-2330-356-14

CHAPTER 7
REPAIR OF ENGINE ASSEMBLY

Section 1. DESCRIPTION AND SPECIFICATIONS

7-1. Scope d. The following systems and components comprise
the Model DJCMS 4118W Diesel Engine:
a. This chapter contains instructions for direct and
general support maintenance of the engine and related (1) Air cooling system (para 7-3)
parts which are beyond the scope of using organization.
(2) Fuel system (para 7-4)
b. The terms right, left, front, and rear used in this
technical manual, with reference to the engine and its (3) Lubrication system (para 7-5)
components, are determined as viewed from the front or (4) Starting system (para 7-6)
flywheel end of engine.
(5) Charging system (para 7-7)
7-2. General
(6) Governor system (para 7-8)
The diesel engine assembly, Model DJCMS
4118W (fig. 5-9) is a 4-cylinder, 4-cycle, valve-in-head, (7) Power train (para 7-9)
aircooled engine. 7-3. Air Cooling System (Fig. 7-1)
b. The engine is used as a power source to drive a
a. The engine has a pressure air cooling system. Fins
pump assembly for fueling and defueling operations.
on the engine blower (flywheel) draw air into the front of
c. Physical and technical characteristics are the engine housing and force it past the cylinders and out
tabulated in table 7-1. the right side of the engine.

Figure 7-1. Air Cooling System.

7-1
TM 9-2330-356-14

b. A thermostatic element controls shutter opening b. In the low pressure system, two fuel pumps (in
which limits air flow when the engine is cold. series) draw fuel from the fuel tank and force the fuel
through two fuel filters to the injection pump.
c. When the engine air temperature reaches
approximately 120F (49C) the shutter begins to open.
c. In the high pressure system, the fuel injection
The shutters are completely open at 140F pump forces fuel, under high pressure, to the fuel
(60C) under full-rated load. inject ion nozzles.
7-4. Fuel System (Fig. 7-2)
d. The injection nozzles provide fuel to each
a. The engine fuel system consists of two pressure combustion chamber of the engine. A small quantity of
systems: the low pressure system and the high pressure unused fuel is returned from the injectors and injector
system. pump to the fuel tank.

Figure 7-2. Fuel System.

7-2
 TM 9-2330-356-14

e. A cam and gear on the camshaft drive the fuel 7-5. Lubrication System (Fig. 7-3)
injection pump. The gear drives the pump face gear,
a. The diesel engine has pressure lubrication to all
providing fuel distribution to each cylinder in the proper
working parts.
order. The cam operates the pump plunger, pressurizing
fuel to the nozzles. b. The oil system includes oil intake cup, gear-type
oil pump, bypass valve, oil pressure gage, low oil pressure
shut-off, full-flow oil filter, oil cooler, and passages to
f. A control sleeve meters fuel by controlling the
deliver oil throughout the engine.
length of time the plunger spill port is closed, maintaining
pressure, and therefore, the amount of fuel delivered in c. Oil is held in the oil base, and forced through the
each stroke. oil filter and oil cooler by the pump.
d. Lines leading to the reeker housing, passages
g. The pintle-type injection nozzles are through the block to crankshaft and to front camshaft
conventional inward opening with adjustable opening bearing, crankshaft passages to connecting rod bearings,
pressure. They are factory adjusted to open at and connecting rod passages to piston pin bushings
1900-1950 psi. complete the oil system network.

Figure 7-3. Lubrication System.

7-3
TM 9-2330-356-14

e. The bypass valve controls oil pressure by allowing c. An overrunning clutch protects the starting
excess oil to flow directly back to the crankcase. motor from overspeeding by the engine.

7-6. Starting System (Fig. 7-4) d. The energized solenoid also closes a set of
contacts to provide a circuit for the starting motor.
a. The engine is cranked by a 12V starting motor.
e. The starting motor remains engaged until the
b. When the solenoid of the starting motor is starting switch is released by operator.
energized, the solenoid core pulls inward and shifts the
pinion into engagement with the ring gear on the engine f. Refer to paragraph 2-10 for starting and operating
flywheel. procedures.

Ftgure 7-4. Starting System.

7-4
 TM 9-2330-356-14

7-7. Charging System (Fig. 7-5) (4) Alternator output is controlled by the voltage
regulator.

CAUTION (5) The voltage regulator senses the difference

between battery voltage and output voltage and regulates
Instantaneous damage will be caused to the the amount of current that is sent to the field windings in
voltage regulator if system polarity is the alternator according to the demand from the batteries.
reversed. Installing a battery backwards,
boosting or jump starting with jumper
connected backwards, or reversing the
positive (+) and negative (-) output leads of
the alternator will damage the regulator.
Although the polarity reversal may only be
momentary, and may not damage the
alternator diodes, the voltage regulator will
still be damaged.

a. Description.

(1) The charging system supplies approximately

14V of direct current for recharging the batteries and
operating the components of the engine electrical system.

(2) The system includes two 12V batteries

connected in parallel, an alternator with integral voltage
regulator, a voltmeter, and wiring to connect these
components together.

(3) The self-load-limiting alternator has a Figure 7-5. Charging System.

built-in solid state voltage regulator.
7-8. Governor System (Fig. 7-6)
(4) The voltage regulator is a J-type regulator a. The purpose of the engine governor is to maintain
equipped with transient voltage protection to withstand a constant engine speed during changes in power
instantaneous opening of the charging circuit under demands. The governor responds to changes in power
full-load conditions. demands by varying the throttle position.
b. Operation. b. The constant-speed governor maintains engine
speed up to 2400 rpm. The speed-sensing device is a ball
(1) The alternator is belt driven off the pump and cup mechanism on the camshaft gear. A yoke, resting
drive coupling. on the cup, is connected to the governor arm which, in
turn, is connected to the throttle lever. Any change in
(2) As the rotor (field) of the alternator turns engine speed is transmitted from the cup to the yoke, and
inside the stator, an alternating current is made in the then to the throttle.
stator windings. The current is rectified or changed into
direct current by positive and negative diodes fastened to c. Tension on the governor spring determines the
the stator. speed at which the engine is governed. A stud screwed into
the spring is used to vary the number of effective cots for
(3) The direct current leaves the alternator at the getting the desired sensitivity-the speed drop from
positive output terminal and is sent to the batteries. no-load to full-load.

7-5
TM 9-2330-356-14

Figure 7-6. Governor System.

7-9. Power Train (Flg. 7-7) (4) The valve opening and closing is timed by the
camshaft gear and crankshaft gear. The sequence is as
The power train includes the cylinder head and cylinder follows:
block assemblies:
(a) Intake open, exhaust closed: Air is
a. Cylinder Head Assembly. drawn into cylinder while piston is moved down.

(1) The cylinder head assembly consists of the (b) Intake closed, exhaust closed: Piston
intake and exhaust valves, valve springs, rocker arms, moves upon compression stroke. Ignition occurs near top
shields, push rods, injection nozzles, and glow plugs. dead center when fuel is injected.

(2) The valve lifters are driven by the camshaft, (c) Intake closed, exhaust closed: Piston
and transfer motion to the intake and exhaust valves moves down on power stroke, transferring force to
through the push rods and the rocker arms. crankshaft.

(3) When the push rod moves down, the valve (d) Intake closed, exhaust open: Piston
spring forces the valve to close against the valve seat and moves up, forcing burned gases out of open valve to
seal off the combustion chamber. exhaust system.

7-6
 TM 9-2330-356-14

Figure 7-7. Power Train.

b. Cylinder Block Assembly. 7-10. Specifications and Tolerances

(1) The cylinder block houses the crankshaft,

pistons, camshaft, and oil pump. a. Tabulated Data.

(2) The crankshaft rotates on front center and (1) Table 7-2 itemizes the dimensions and
rear main bearings, and has a flywheel (fig. 7-1) on one clearances applicable to the DJCMS diesel engine
end and the power takeoff shaft on the other. components. The dimensions and clearances shown are
(3) A gear, located on the crankshaft, drives the for new parts.
camshaft and oil pump.
(2) Where greater tolerances are allowed, they
(4) Power is supplied to the crankshaft by the will be shown in the applicable maintenance paragraph.
four pistons and the connecting rods.

(5) A ring gear (fig 7-1), mounted on the b. Torque Specifications. The torque values shown in
flywheel, is engaged by the starter motor pinion gear when table 7-3 will ensure proper tightness without danger of
the starter solenoid relay is energized. stripping threads.

7-7
TM 9-2330-356-14

Table 7-1. Physical and Technical Characteristics, Model DJCMS Diesel Engine.

Physical Dimensions: Electrical Characteristics:

Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..26 in. Batteries . . . . . . . . . . . . . . . . . . 2, connected in parallel
Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..19.5 in. Battery voltage . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Vdc
Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..34.5 in.
Weight . . . . . . . . . . . . . . . . . . . . . . . . . .440 lb. (approx.) Miscellaneous Data:
Cooling air at 2400 ram . . . . . . . . . . . 1l135 cu. ft./min.
Fuel pump lift . . . . . . . . . . . . . . . . . . . . . . . . . .6ft./max.
Physical Characteristics: Combustion air at 2400 rpm . . . . . . . . ..64 cu. ft./min.
Number of cylinders . . . . . . . . . . . . . . . . . . . . . . . . ...4
Displacement . . . . . . . . . . . . . . . . . . . . . . ...120 cu. in. Power Takeoff
Horsepower at 2400 ram . . . . . . . . . . . . . . . . . . . . . 27.5 Shaft length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..4in.
Governor setting . . . . . . . . . . . . . . . 2400 rpm+/-100 Shaft diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.75 in.
Ignition order of cylinders . . . . . . . . . . . . . ...1,2,4,3 Keyway length . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..3 in.
Keyway width . . . . . . . . . . . . . . . . . . . . . . . . ...0.375 in.
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.250 in. dia.
Keyway depth . . . . . . . . . . . . . . . . . . . . . . . . ...0.188 in.
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..3.625 in.
Compression ratio . . . . . . . . . . . . . . . . . . . . . . . . . . 19:1 Starting Aids:
Oil capacity, including 1/2quart Starting motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12V
for filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61/2 quarts Glow plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...4
Fuel, diesel . . . . . . . . . . . . . . . . . Fed. SpecVV-F-800 Manifold heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2

Table 7-2. Repair and Replacement Standards.

(All values in inches unless otherwise specified.)

Manufacturers Dimensions
Component and Tolerances Maximum Allowable
Wear Limit
Minimum Maximum
CAMSHAFT
Beating journal diameter front 2.500 2.505 0.002
Bearing journal diameter rear 1.1875 1.1880 0.002
Bearing clearance limit 0.0012 0.0037 0.0057
Camshaft end play 0.007 0.039 0.045
Cam tappet hole diameter 0.7.505 0.7515 N/A
Cam tappet diameter 0.7475 0.7480 N/A
CONNECTING RODS:
Largebearingbore 2.1871 2.1876 2.1886
Small bushing bore 1.044 1.045 1.0455
Length - center to center 5.998 6.002 6.002
Bearing to crankshaft clearance 0.0010 0.0033 0.0040
CRANKSHAFT
Main bearing journal diameter 2.2430 2.2435 0.001
Crankshaft main bearing clearance 0.0024 0.0049 N/A
Connecting rod journal diameter 2.0600 2.0605 N/A
End play, crankshaft 0.010 0.015 0.015**
CYLINDER BLOCK:
Cylinder bore 3.2495 3.2505 0.005

Clearance in cylinder bore 0.0050 0.0070 0.005

Bore, piston pin 0.9900 0.9903 0.9903
Ring groove width top 0.0970 0.0980 0.005
Ring groove width 2nd & 3rd compression 0.0965 0.0975 0.005
Ring groove width 4th oil control 0.1880 0.1895 0.005

7-8
 TM 9-2330-356-14

Table 7-2. Repair and Replacement Standards (Cont).

(All values in inches unless otherwise specified.)

Manufacturers Dimensions
Component and Tolerances Maximum Allowable
Wear Limit
Minimum Maximum
PISTON PIN:
Length 2,753 2.756 N/A
Diameter 0.9699 0.9901 0.001
Piston clearance Thumb push fit
Connecting rod bushing clearance 0.0002 0.007 0.0006
PISTON RING:
Clearance in groove top 0.0035 0.0075 0.0100
Clearance in groove 2nd & 3rd compression 0.0030 0.0050 0.0080
Clearance in groove 4th oil control 0.0020 0.0030 0.0050
Gap 0.0100 0.0200 0.0400
VALVE, INTAKE:
Stem diameter 0.3415 0.3410 N/A
Stem guide clearance 0.0025 0.0028 N/A
Stem to rocker arm clearance Cold 0.008 0.0005
Seat diameter in head 1.361 1.362 N/A
Top of valve recessed below cylinder head deck 0.433 0.439 0.500
Seat width 0.0468 0.0625 N/A
Valve seat angle 45 N/A N/A
Valve face angle 42 N/A N/A
VALVE, EXHAUST
Stem diameter 0.3415 0.3410 N/A
Stem guide clearance 0.0045 0.005 N/A
Stem to rocker arm clearance 0.007 0.0005
Seat diameter in head 1.361 1.362 N/A
Top of valve recessed below cylinder head deck 0.433 0.439 0.500
Seat width 0.0466 0.0625 N/A
Valve seat angle 45 N/A N/A
Valve face angle 45 N/A N/A
VALVE GUIDE:
Length 1.7812
Outside diameter 0.4690 0.4695 0.4695
Bore diameter intake reamed 0.3425 0.3435 0.003
Bore chameter exhaust reamed 0.3445 0.3455 0.003
VALVE LIFTER:
Body diameter 0.8725 0.8730 0.003
overall length 1.510 1.550 1.500
Lifter bore 0.8755 0,8765 0.006
VALVE SPRINGS INTAKE & EXHAUST
Free length 1,875 N/A
Total coils 5.75 N/A
Length, valve closed 1.528 N/A
Length, valve open 1.214 N/A
Load, valve closed 45 lb. 49 lb. 40 lb.
Load, valve open 83 lb. 93 lb. N/A
CYLINDER HEAD.
Warpage (longitudinally) 0.001 0.0015
Warpage (laterally) 0.001 0.0015

* Replacement bearing only

** Shim controlled

7-9
TM 9-2330-356-14

Table 7-3. Torque Values.

Torque Range (Lb. -Ft.)

Item
Minimum Maximum
Center main bolt 97 102
Connecting rod bolt 27 29
Rocker-box cover 8 10
Cylinder head bolt 44 46
Exhaust manifold nuts 13 *15
Flyweel mounting screw 65 70
Hub to flywheel.screws 17 21
Fuel pump mounting screws 15 20
Gear case cover 15 20
Glow plug 10 15
Injection nozzle mounting screws 20 21
Injection pump mounting screws 15 16
Intake manifold 13 15
Oil base mounting screws 45 50
Oil pump mounting screws 15 20
Rear bearing plate 40 45
Rocker arm nut 4 **10
Rocker arm stud 35 40
* Exhaust nuts must be tightened evenly.
** This torque is due to friction between the threads only and locks the nuts in
place. Use the rocker arm nut to adjust valve lash.

Section II. REMOVAL AND INSTALLATION OF MAJOR COMPONENTS

7-11. General c. Refer to table 5-1, Special Tools, Test and Support
Equipment, and ensure that the necessary tools are
a. This section contains step-by-step procedures for available. Always use the right tool for the job; do not
removal and installation of the auxiliary engine major improvise.
components and subassemblies.
7-13. Removal Procedures
b. Do not disassemble the engine beyond the
procedures described in this chapter. a. General.

c. Any further breakdown of the major components (1) Using clean rags and diesel fuel, remove all
or subassemblies for repair of the engine will be found grease, oil, and dirt from the engine prior to disassembly.
under the appropriate headings in Section III, Repair
(2) Remove drain plug and drain crankcase oil
Instructions.
completely. Tip engine toward drain plug side while
draining,
7-12. Preparation
(3) Drain fuel from fuel lines and empty the fuel
Prior to disassembly of the engine, the following sediment bowl.
conditions should be established.
b. Removal.
Provide a clean work area. Many diesel engine
parts are intolerant of even minute particles of dirt. A (1) The following paragraphs contain the
clean area is required for placement of parts as they are instructions necessary to disassemble the engine to
removed. replace damaged or worn components. If each procedure
is followed in order, the engine will be disassembled for
b. Ensure availability of proper cleaning materials complete overhaul.
such as solvents, lint-free cloths, soft brushes, pans, waste
containers, etc. Do not use volatile solvents for cleaning. (2) Prior to assembly of the engine, certain
Diesel fuel is a suitable cleaning solvent, but must be inspections and repairs should be accomplished as
handled and stored properly. described in Section IV, Test and Adjustments.

7-10
 TM 9-2330-356-14

7-14. Air Cooling Shrouding

a. Top Air Housing Covering (2, Fig. 7-9) .
(1) Remove muffler (para 4-77).
(2) Disconnect air cleaner hose at the air intake
manifold (para 4-74).
(3) Remove five capscrews (1, fig. 7-10) and nuts
(2) to securing muffler stand (3) to panels (4 and 5).
(4) Remove capscrew (7, fig. 7-9) and spacer (8)
from the lifting bracket brace (9). Remove two capscrews
(13), washers (14), vibration cushions (15), and spacers
(16). Remove lifting bracket (17) and lifting bracket brace
(9).
(5) Remove four capscrews (18) and washers (19)
and remove top air housing cover (2). Figure 7-8. Shutter Assembly.

1. Rear cylinder housing 13. Capscrew (2) 24. Capscrew (2)

2. Top air housing cover 14. Washer (2) 25. Washer (2)
3. Bottom cylinder pan 15. Vibration cushion (2) 26. Capscrew
4. Cover panel 16. Spacer 27. Screw (2)
5. Grille 17. Lifting bracket 28. Capscrew (3)
6. Blower housing 18. Capscrew (4) 29. Washer (3)
7. Capscrew 19. Washer (4) 30. Capscrew (2)
8. Spacer 20. Capscrew 31. Grille retainer (3)
9. Lifting bracket brace 21. Capscrew (3) 32. Capscrew
10. Capscrew 22. Lockwasher (3) 33. Lockwasher
11. Lockwasher 23. Capscrew (8) 34. Baffles (2)
12. Nut

Figure 7-9. Blower Housing and Air Shrouding

7-11
TM 9-2330-356-14

b. Blower Housing (6, Fig. 7-9). (5) Remove top capscrew (21), lockwasher (22),
and grille retainer (31) from the blower housing grille (5).
NOTE
(6) Remove eight capscrews (23), two capscrews-
To remove blower housing only, the top air (24), two washers (25), and capscrew (26). Remove blower
housing cover (2, fig. 7-9) need not be housing (6).
removed. The two capscrews (18) and
washers (19) securing air housing cover to c. Air Shutter (Fig. 7-8).
blower housing must be removed to remove
blower housing. (1) Remove the high temperature switch
(para 7-17).
(1) Disconnect air cleaner hose at the engine air (2) Pull high temperature switch leads out
intake manifold, if not previously removed (para 4-74). through hole in air shutter box.
(2) Disconnect the fuel hoses from the fuel tank (3) If blower housing was not previously
(para 4-73). Pull hoses through holes in engine fan shroud removed, remove two capscrews (29, fig. 7-44).
(8, fig. 7-10).
(4) Remove three capscrews (30) and washers
(3) Remove four screws (6, fig. 7-10) and nuts(7) (31), and remove air shutter assembly. Remove forward
securing engine fan shroud (8) to frame (9) and panel (5). rocker cover for clearance.
Remove engine fan shroud.
d. Rear Cylinder Housing (1, Fig. 7-9).
(4) Loosen capscrew (20, fig. 7-9), but do not
remove. (1) Remove throttle cable only at engine
(para 4-75).

(2) If air shutter was not previously removed,

remove three capscrews (30, fig. 7-44).

(3) Remove two screws (27, fig. 7-9), three

capscrews (28), and three washers (29). Remove rear
cylinder housing (1).

e. Bottom Cylinder Pan (3, Fig. 7-9).

NOTE
To remove bottom cylinder pan (3, fig. 7-9),
the top air housing cover (2), rear cylinder
housing (1), and blower housing (6) must be
removed.

(1) Disconnect the hot lead from the fuel shutoff

solenoid, the two leads from the oil pressure switch, and
the nylon tube from the oil pressure switch (para 4-22).
Disconnect large lead from the manifold heaters
(para 4-20).

(2) Disconnect the governor arm (3, fig. 7-14)

1. Capscrew (5) 6. Screw (4)
2. Nut (5) 7. Nut (4) from the governor linkage (1) by removing nut (21) from
3. Muffler stand 8. Fan shroud the ball joint (22).
4. Panel 9. Frame
5. Panel (3) Remove all fuel lines (para 7- 19).
TA100C83
Figure 7-10. Removal of Muffler Stand and Fan Engine (4) Remove two screws (30, fig. 7-9), and remove
Shroud. bottom cylinder pan (3).

7-12
 TM 9-2330-356-14

7-15. Oil Cooler and Lines (Fig. 7-11) Remove four capscrews (3), lockwashers (4), and
nuts (5) attaching oil cooler (6) to mounting bracket (7),
a. Remove blower housing (para 7-14). and remove cooler.

NOTE 7-16. Tachometer Sensor (M967, M969, and

M970) (fig. 7-12)
Oil cooler and lines maybe filled with oil. Use
care to prevent spillage.
a. Remove blower housing (pars 7-14).
b. Disconnect oil cooler hoses at valve of oil filter
adapter (11). b. Unscrew bottom jam nut on sensor and remove
sensor from mounting bracket. Disconnect two electrical
c. Drain cooler into a suitable container. leads from sensor and remove sensor.

Figure 7-12. Tachometer Sensor

7-17. High Temperature Switch (Fig. 7-13)

a. Replacement of high temperature switch is done

from under the vehicle. The switch is attached to the
exhaust manifold behind the air shutter assembly on the
left side of engine.
1. Capscrew 7. Bracket
2. Clamp (2) 8. Hose
3. Capscrew (4) 9. Hose b. Block open louvers on air shutter.
4. Lockwasher (4) 10. Capscrew (2)
5 Nut (4) 11. Oil filter adapter
6. Oil cooler Tag and disconnect two leads (1 and 2) from high
TA100084 temperature switch (13).
Figure 7-11. Oil Cooler and Lines.
d. Remove two capscrews (3) and two washers (4)
CAUTION holding switch bracket (10) to the exhaust manifold.
Remove bracket with pressure switch attached.
Do not bend or damage the aluminum cooling
fins when removing cooler. Remove the nut (5), star washers (6), terminal (7),
flatwasher (8), insulated washer (9), switch bracket (10),
d. Remove self-locking screw (1) and two retaining insulated sleeve (11), insulated washer (12), and high
clamps (2). temperature switch (13).

7-13
TM 9-2330-356-14

Figure 7-13. High Temperature Switch Installation.

7-18. Governor Linkage (Fig. 7-1 4) d. Remove cotter pin (5), and remove throttle rod
(7) and two washers (20) from control arm (19).
a. Disconnect governor linkage (1) from injector e. Remove bracket (12) from engine back plate by
pump (2) and governor arm (3). removing two screws (13), lockwashers (14), and nuts (15).

7-19. Fuel Lines (Fig. 7-15)

Remove spring (17) and disconnect governor arm
(3) from governor shaft (4). a. Tag and remove injector nozzle return lines (3).
b. Remove manifold (4) and return line (5).
Remove cotter pin (8) and clevis pin (9), and
disconnect yoke (10) from throttle rod (7). c. Tag and remove injector lines (7).

7-14
 TM 9-2330-356-14

Figure 7-14. Speed and Governor Control.

Figure 7-15. Injection Fuel Lines.

7-15
TM 9-2330-356-14

7-20. Fuel Stop Solenoid (Fig. 7-16)

a. Remove engine shroud panel.

b. Remove the two screws fastening the solenoid to

the bottom cylinder pan. Remove solenoid.

c. Remove electrical lead to control.

Figure 7-17. Exhaust Manifold.

7-23. Oil Filler Tube

a. Remove the fuel filter adapter (1, fig. 7-18) and

fuel filters (2) as an assembly by removing three capscrews
(3) and lockwashers (4). Lower assembly enough to expose
the two filler tube mounting capscrews (1, fig. 7-19).

b. Remove two capscrews (1) and lockwashers (2)

that secure filler tube (3) to engine block.

c. Remove filler tube (3) and gasket (4). Discard

gasket.

Figure 7-16. Removal of Fuel Stop Solenoid.

7-21. Engine Junction Box and Electrical Wiring

Refer to paragraph 4-19 for removal

7-22. Exhaust Manifold (Fig. 7-17)

a. Remove air shutter assembly (para 7-14).

b. Remove exhaust pipe (para 4-77).

c. Remove high temperature switch (para 7-17).

d. Bend tabs (1, fig. 7-17) down, and remove eight

capscrews (2) and washers (3) attaching exhaust manifold
(4) to cylinder heads. Remove manifold and four gaskets
(5). Figure 7-18. Removal of Fuel Filter Adapter

7-16
 TM 9-2330-356-14

b. Disconnect oil line (2) from adapter (1) and

restricted tee (3). Remove oil line (2).

Disconnect oil line (4) from adapter (5) and

restricted tee (3). Remove oil line (4).

d. Disconnect oil line (6) at elbow (7), and remove

oil line (6).

7-25. Oil Filter Adapter (Fig. 7-20)

a. Remove blower housing (para 7-14).

Disconnect oil cooler hoses from oil filter adapter

(para 7-15).

c. Remove oil filter (para 4-72).

Disconnect oil lines from oil filter adapter

(para 7-24).
Figure 7-19. Removal of Filter Tube.
e. Remove elbow (15, fig. 7-20).
7-24. Oil Lines (Fig. 7-20)
f. Remove three screws (17) and washers (18), and
Disconnect oil line (9) at elbow (10) and restricted remove oil filter adapter (19) and gasket (20). Discard
tee (14). Remove oil line (9). gasket.

Figure 7-20. OiI Lines, Oil Filter Adapter and Oil Cooler Thermostat.

7-17
TM 9-2330-356-14

7-26. Fuel Injection Pump (Fig. 7-21 ) f. Remove four hexagon nuts (2, fig. 7-21),
lockwashers (3), and flatwashers (4), holding injection
pump (1) to crankcase, and remove pump. Be careful to
CAUTION retain the shims (5) from between the crankcase and
pump. The correct thickness of shims as stamped on the
All fuel connections must be plugged or crankcase, above the injection pump, is important to
capped to prevent contamination. proper pump operation; it provides the proper gear
backlash.
a. Snap off governor linkage (1, fig. 7-14) from
injection pump (2, fig. 7-14) and governor control arm (3, g. When removing a pump for replacement, record
fig. 7-14), and remove linkage. the button thickness and port closing dimensions as
stamped on the side of the pump mounting flange
b. Tag and disconnect high pressure lines at injector (fig. 7-76). These values are important in timing a new
nozzles and at injection pump (fig. 7-15). pump to the engine. If there is a standard button in the
pump, it may not be stamped or it will have the number 11
c. Tag and disconnect inlet and fuel return lines
stamped on the flange.
from injection pump (para 4-73).

d. Prior to removing the injection pump, position 7-27. Flywheel Assembly (Fig. 7-22)
the number one piston on the compression stroke by
placing the PC mark on the flywheel in line with timing a. Remove blower assembly (para 7-14).
mark on gear case cover (fig. 7-78).

e. Remove the timing hole screw on the left side of b. Remove screw (1) and washer (2) attaching
pump mounting flange. Insert a 1/8-inch diameter brass flywheel to crankshaft.
wire in the timing index hole. If the piston is on the
compression stroke, the wire will enter the index hole in c. Install two screws in flywheel hub from puller(8)
the gear face. (Depth approximate 1 1/8-inch -GO, to remove flywheel (3), ring gear (5), and key (6).
7/8-inchNO GO.) If not, rotate the flywheel one
complete revolution and reinsert the wire.

Figure 7-21. Fuel Injection Pump. Figure 7-22. Flywheel Assembly.

7-18
 TM 9-2330-356-14

7-28. Fuel Injectors (Fig. 7-23) a Remove fuel lines (3 and 7, fig. 7-15) at fuel
injectors.
CAUTION
b. Remove screws (1, fig. 7-23), washers (2), and
All injector openings and nozzles must be retaining flange (3).
capped when the injector is removed from
the engine to prevent contamination.
c. Remove fuel injector (4), gasket (5), adapter (6),
NOTE gasket (7), and heat shield (8) as an assembly, and remove
To remove injectors behind air intake man- gasket (9). Separate fuel injector (4) from other parts by
ifold, remove air intake manifold (para 4-82). pressing it out.

Figure 7-23. Fuel Injector Removal.

7-19
TM 9-2330-356-14

7-29. Rocker Arm Covers (Fig. 7-24)

a. Remove all necessary shrouding, and remove

lifting bracket (para 7-14) to gain access to rocker arm
covers.

b. Remove four screws (1, fig. 7-24) and

lockwashers (2) attaching each rocker arm cover (3) to
cylinder head (5), and remove cover carefully.

c. Remove and discard rocker arm cover gasket (4).

7-30. Cylinder Head and Rocker Arms (Fig. 7-25)

a. Remove all engine shrouding (para 7-14).

b. Remove exhaust manifold (para 7-22). Remove

intake manifold (para 4-82).

Remove fuel injectors (para 7-28) and

connecting oil lines (para 7-24) to head.

d. Remove glow plugs (para 4-21).

Figure 7-24. Rocker Arm Covers.

Figure 7-25. Cylinder Head Removal,

7-20
 TM 9-2330-356-14

e. Remove rocker arm cover and gasket (para 7-29). may have to be removed before attaching
engine.
f Remove the two baffles (34, fig. 7-9) by removing
capscrew (32) and washer (33).
(1) Remove engine from engine mounting frame
Remove stand pipe vent (20, fig. 7-25). (para 5-20) and attach to an engine maintenance stand, if
g.
not done previously.
h. Remove reeker arms by removing self-locking
arm nuts (1, fig. 7-25) and reeker arm balls (2) on each (2) Drain crankcase oil (para 4-71).
rocker arm (3). Lift reeker arm (3) off.
(3) Remove cylinder heads (para 7-30).
i. Remove five capscrews (4), push rod guide plate
(5), six screws (6), and washers (7) holding each cylinder
NOTE
head (8) to cylinder block (9).
Do not set the cylinder assembly upright until
j. Remove push rod (15) and remove cylinder heads. after removal of the oil pump pick-up cup
If heads stick, rap sharply with a soft hammer. Do not use a assembly, camshaft, and valve tappets
pry. Do not strike cooling fins. described In the following paragraphs.
k. Remove push rod shields (17) and seals (16),
spring (18), washers (19), and tappets (20). (4) Turn cylinder block and oil base on its side.

l. Remove cylinder head gaskets (10).

CAUTION
7-31. Piston and Connecting Rod
Do not attempt to pry the oil base free of the
a. General (Fig. 7-26). cylinder block assembly. If necessary, use a
soft mallet to separate the oil base.
(1) Each piston (7) is fitted with three
compression rings and an oil control ring (4).
(5) Remove ten capserews (3, fig. 7-27) and
(2) Full floating piston pins (6) connect the piston lockwashers (4) and remove the oil base (1) from cylinder
to the connecting rod (12). The pins are held in place with block (38).
a retaining ring (5) at each end.
(6) Remove screws (4, fig. 7-32), lockwasher (3),
(3) The lower end of each connecting rod and bracket (2), and remove oil cup assembly (1).
contains half-shell, precision bearings (11), and the upper
end contains reamed bushings (13). (7) Remove ridge from cylinder bore with a ridge
reamer before removing piston.
b. Removal (Fig. 7-27).
(8) Remove bolts (5, fig. 7-27), cap (7), and two
NOTE bearings (6) from each connecting rod (8). Push piston
assembly (9) upward through top of cylinder bore with a
The connecting rod and cap are stamped
for Installation in the proper cylinder. When soft wooden tool to prevent rod bearing damage. If piston
removing piston assemblies, check the assembly cannot be removed, turn crankshaft to aline
connecting rod with the crankshaft.
marking so each piston can be Installed in
the proper cylinder.
(9) Loosely install cap (7) and bearings (6) on the
When using some maintenance stands, the corresponding removed piston assembly to maintain
engine starter and air shutter assembly proper grouping.

7-21
TM 9-2330-356-14

Figure 7-26. Piston Connecting Rod.

7-22
 TM 9-2330-356-14

Figure 7-27. Crankshaft, Pistons, and Connecting Rod.

7-23
TM 9-2330-356-14

7-32. Gear Cover Assembly cover, tap it with a soft hammer. Remove gasket (6,
fig. 7-31).
Remove blower housing (para 7-14) if removal is
done with engine attached to vehicle. 7-33. Governor Cup (Figs. 7-29 and 7-30)

b. Remove governor arm (3, fig. 7-14) by loosening a. Remove retaining ring (fig. 7-30) from camshaft
screw (3, fig. 7-28). center pin.

c. Remove flywheel assembly (para 7-27).

NOTE
Remove four screws (1, fig. 7-31), lockwashers Be sure to catch the ten flyballs that will fall
(2), screw (3), and lockwasher (4) holding gear cover(5) to out when cup is removed.
crankcase. Remove two screws (31), lockwashers (30),
cover (29), and gasket (28). Tape crankshaft keyway to
prevent damage to seal (11, fig. 7-28). To loosen gear b. Slide governor cup off camshaft center pin.

Figure 7-28. Gear Cover Components.

7-24
 TM 9-2330-356-14

7-34. Camshaft and Tappets

a. Remove engine (para 5-20). Install engine in an

engine maintenance stand.

b. Remove blower housing (para 7-14).

c. Remove rocker arm covers (para 7-29).

d. Remove gear cover assembly (para 7-32).

e. Remove fuel injection pump (para 7-26).

f Remove crankshaft gear retaining washer (8,

fig. 7-31) by removing retaining ring(7) on the crankshaft.

g. Remove rocker arms and push rods (para 7-30).

h. Remove oil base (para 7-31).

CAUTION

When removing camshaft be careful not to

damage bearings (24, 25, and 26, fig. 7-31).

i. Lay engine on side to avoid dropping tappets (27)

and remove camshaft assembly (14) as a group. If
necessary, pry it out with a screwdriver between camshaft
gear and crankcase. Remove retaining ring (15) and press
gear (16) off camshaft.

j. Remove the valve tappets (27). These can be

removed only from bottom of crankcase.

k. Refer to paragraph 7-36j and 7-36k, and remove

crankshaft gear.

l. Camshaft Bearings. The camshaft bearings (24,

25, and 26, fig 7-31) should be replaced if clearance to
camshaft is greater than specified in table 7-2, or if
bearings show cracks, breaks, burrs, excessive wear, or
other defects. The camshaft-to-bearing clearance should
be 0.0012- to 0.0037-inch. To check rear bearing (24),
remove expansion plug (23) at rear of crankcase.
Figure 7-30. Governor Cup Assembly.

7-25
TM 9-2330-356-14
fig 7-31.
7-26
 TM 9-2330-356-14

7-35. Oil Pump f Remove gear cover assembly (para 7-32).

a. Remove gear cover assembly TM (para 7-32). g. Remove cylinder heads (para 7-30),
Remove oil base assembly and oil cup assembly h. Remove oil base (para 7-31).
(para 7-31).
1. Remove oil pump cup assembly (para 7-35).
Remove crankshaft gear lock ring (5, fig. 7-32)
and retaining washer (6). At this time crankshaft gear (7) Remove retaining ring (14, fig. 7-27) and
should be inspected for signs of wear. retaining washer (15) in front of crankshaft gear (16).

d. Hold the oil pump (10) while removing attaching k. Pull off crankshaft gear. It has two -20 NC
screws (8) and lockwashers (9). Remove oil pump (10). tapped holes for attaching a gear pulling ring (fig. 7-33).
Use care not to damage teeth if gear is to be re-used.
7-36. Crankshaft and Main Bearings (Fig. 7-27) Remove woodruff keys (26 and 27, fig, 7-27).
a. Remove engine (para 5-20). Install engine in an 1. Remove three capscrews (32, fig. 7-31),
engine maintenance stand. lockwashers (37), and starter and mounting bracket (34).
b. Remove blower housing (para 7-14), Remove capscrew (18), lockwasher (19), and
c. Remove oil cooler and lines (para 7-15). baffle (35).

d. Remove oil filter adapter (para 7-25). Remove capscrew (36), lockwasher (37), two flat
head screws (20), and backplate (21). Remove connecting
e. Remove flywheel (para 7-27). rod and piston assemblies (para 7-31).

Figure 7-32. Oil Pump Removal.

7-27
TM 9-2330-356-14

Failure to follow this caution may result In

damage to engine components.

e. During reassembly of internal engine compo-

nents, coat all components heavily with oil of the same
grade to be used in the crankcase. During the first few mo-
ments of operation, the engine will depend upon this lu-
brication. Refer to Section I Chapter 3 for proper
lubricants.

7-38. Crankshaft and Main Bearing Blocks

(fig. 7-27)

After each Installation step, check crankshaft

Figure 7-33. Cra.nhshaft Gear Removal. to be sure it is not frozen In place.

o. Remove bolt (41, fig. 7-27) and washer (40) from

Heat cylinder block (38, fig. 7-27) and bearing
end of crankshaft. Using a puller, remove pump coupling
plate (18) at 325F in oven for 30 minutes, then press front
(39). Remove woodruff key (25).
and rear main bearings (21) into place, alining bearing
housing oil holes (fig. 7-34).
Remove rear bearing plate (18) from crankcase.
Remove gasket (22) and shims (23).
b. Install thrust washers (24, fig. 7-27) over end of
crankshaft.
Remove two bolts (30), washers (31), bottom
center main bearing housing (32), and center bearing (34).
Rotate crankshaft and remove upper center bearing Oil the bearings surfaces and install crankshaft
housing (36) and center bearing (35). Remove crankshaft (37, fig. 7-27) from rear of crankcase through rear bearing
plate hole. Aline slots in front thrust washer (24) with
(37) through rear opening in crankcase.
locating pins (fig. 7-34).
7-37. Instruction Procedures
d. Install bearing (34, fig. 7-27) into lower center
main bearing housing (32). Install bearing (35) into upper
a. The following paragraphs contain step-by-step
center bearing housing (36). Set the upper half of the
instructions necessary to reassemble the engine following
center main housing (36) on the crankshaft (37) and rotate
maintenance procedures.
it into place. Be sure it is installed with the side marked
front toward the crankshaft gear. Set the two positioning
b. Prior to undertaking engine reassembly, certain
dowels (33) on the upper bearing mount. Install the center
major components such as the crankshaft, camshaft and
main bearing housing (32) and tighten the center main
governor, fuel pumps, and cylinder head should be bolts (30) per specifications in table 7-3.
inspected and repaired as described in Section III, Repair
Instructions.
Place gasket (22) on each side of shim (23) and
place on rear bearing plate (18).
c. During reassembly of the engine, the work area
should be as clean as possible to reduce engine
contamination which can cause engine failure. NOTE

d. Use only clean, lint free cloth (item 24, Appen- Before tightening capscrews(19) ensure that
dix E) for wiping engine parts. Oil and diesel fuel used thrust washers (24) are in position over
during the reassembly process must be clean. Handle all locating pins.
parts carefully, especially bearings and machined surfaces.
f. Before installing bearing plate, tape keyway and
sharp edges on crankshaft to protect the oil seal during
CAUTION installation. Place rear thrust washer (24) over locating
pins on rear bearing plate (18). Mount and secure rear
Ensure that all components are coated with bearing plate (18) with six capscrews (19) and flatwashers
the proper grade of oil as they are assembled. (20).

7-28
 TM 9-2330-356-14

Figure 7-34. Crankshaft Bearing Installation.

g. Check crankshaft end play (fig. 7-35). Use

enough rear bearing plate shims (23, fig. 7-27) to provide
0.010- to 0.015-inch end play. If more than 0.010-inch total
thickness is required, use a steel shim of proper thickness
and a 0.005-inch thick gasket on each side of shim. This
avoids excessive gasket compression and maintains bolt
torque.

h. Install new gasket (22, fig. 7-31) and backplate

(21). Secure with capserew (36), lockwasher (37), and two
flat head screws (20).

i. Install baffle (35) onto backplate (21). Secure with

capscrew (18) and lockwasher (19).

j. Install starter and mounting bracket (34) onto

backplate (21) with three capscrews (32) and lockwashers
(33).

Figure 7-35. Crankshaft End Play Measurement.

7-29
TM 9-2330-356-14

NOTE
CAUTION
DO NOT install crankshaft washer (15) or
retaining ring (14) if camshaft has to be Fallure to allow clearance can damage oil
installed in crankcase. Camshaft gear will not pump.
clear the retaining washer.
c. Mount oil pump (10) on engine using screws (8)
Install keys (26 and 27, fig. 7-27) on crankshaft and lockwashers (9). Allow pump drive gear to crankshaft
(37), Use fabricated tool (table 5-2) to drive gear (16) into gear clearance. Clearance must be 0.005-inch backlash.
place, with beveled side facing engine crankcase. Fully
seat gear. Install crankshaft washer (15) and retaining ring d. Install oil cup assembly (1) into oil pump (10).
(14) only if camshaft has not been removed. Install bracket (2) on center main bearing housing
l. Install key (25) on crankshaft. Drive pump and secure with lockwasher (3) and screw (4).
coupling flange (39) onto end of crankshaft. Install washer f. Install oil base (para 7-43).
(40) and capscrew (41).
g Install gear cover (para 7-42).
m. Install rod and piston assemblies (para 7-43).
7-40. Camshaft Assembly and Tappets
n. Install oil pump cup assembly (para 7-39). (Fig. 7-31)
o. Install oil base (para 7-43).
NOTE
p. Install gear cover assembly (para 7-42). Expansion plug must not protrude from rear
q. Install flywheel (para 7-47). face of crankcase.
r. Install cylinder heads (para 7-44). a. Press new camshaft bearings into place using
s. Install blower housing (para 7-60). bearing driver 420-0326 (table 5-1). See figure 7-36 for
proper placement. Press bearing flush with bottom of
7-39. Oil Pump (Fig. 7-32) expansion plug recess. Press front bearing flush with
a. Install gear (7, fig. 7-32), retaining washer (6), crankcase front surface with oil passages alined. Do not
and lock ring (5). attempt to ream bearings; they are a precision type. After
rear bearing is installed, insert a new expansion plug in
b. Fill pump intake and outlet with oil to ensure that recess, using sealing compound, and expand it into place
it is primed. with sharp blows at its center.

Figure 7-36. Camshaft Bearing Installation.

7-30
 TM 9-2330-356-14

b. With engine laid on its side, install tappets (27,

fig. 7-31).

c. Install key (17, fig. 7-31) on camshaft (14). Press

on gear (16) and install retaining ring (15).

d. Install camshaft assembly (14) in engine, and

ensure that tappets (27) are in place. Aline timing marks
on camshaft gear and crankshaft gear (fig. 7-37). Install
retaining washer (8) and retaining ring (7). Use a pinch bar
and pry up on crankcase gear (fig. 7-28). Using a feeler
gage, measure the gap between the camshaft gear and
crankshaft retainer washer. Gap should be .007- to
.039-inches.

TA502326
Figure 7-38. Timing Gear End Play.
k. Install reeker arm covers (para 7-45).

l Install blower housing (para 7-60).

m. Install engine (para 5-20).

7-41. Governor Cup (Fig. 7-30)

a. Fill flyball recesses with grease (item 16, Appen-

dix E) and install flyballs.

b. Position governor cup on shaft and install

retaining ring.
TA502325
Figure 7-37. Crankshaft and Camshaft Gear 7-42. Gear Cover Assembly (fig. 7-28)
Timing Marks.
a. Pack the cavity between the two oil seal lips (6,
e. Turn engine with oil base down and install push fig. 7-28) with grease (item 16, Appendix E).
rods (para 7-43).
b. Tape keyway and sharp edges on crankshaft to
Install oil base (para 7-43). protect the oil seal during installation.
f.
c. Mount gear cover (5, fig. 7-31) on engine using
g. Install crankshaft gear retaining washer (8, new gasket(6), screws (1 and 3), and lockwashers (2 and 4).
fig. 7-31) and retaining ring (7) on the crankshaft. Tighten mounting screws to specified torque (table 7-3).
Before tightening screws, ensure that stop pin is in
h. Install rocker arms (para 7-44). governor cup hole.

d. Install cover (29, fig. 7-31) and gasket (28) with

i. Install fuel injection pump (para 7-48).
two capscrews (31) and lockwashers (30).

j. Install gear cover assembly (para 7-42). e. Install flywheel assembly (para 7-47).

7-31
TM 9-2330-356-14

f. Replace governor arm (3, fig. 7-14) by tightening 7-44. Cylinder Head and Rocker Arms (Fig. 7-25)
screw (3, fig. 7-28).
a. Place head assemblies (8, fig. 7-25) and gaskets
g. Install blower housing (para 7-60). (10) on cylinder block (9). Install springs (18), washers (19),
and seals (16) on push rod shields (17), and install
7-43. Pistons and Connecting Rods (Fig. 7-27) assembled push rod shields in cylinder block. Lift backside
of cylinder head in place. Use an anti-seize compound
a. Hone cylinder walls. Clean and oil the cylinder (item 5, Appendix E) on head bolt threads, and thread
walls. Install each piston in proper cylinder using a bolts (4 and 6) and washers (7) into cylinder block (9). Do
suitable piston ring compressor. Each piston assembly not tighten head bolts at this time.
should be installed with notch on piston toward front of
engine. NOTE
b. Position each connecting rod on crankshaft, oil Installing exhaust manifold now alines all four
the journal, and install rod cap with bearing half. When exhaust ports with exhaust manifold before
installing rod cap, position so raised witness mark on the the heads are torqued down.
forging matches the mark on connecting rod (figs. 7-27
and 7-39). Piston witness mark should face front, and rod b. Install exhaust manifold (para 7-52). Tighten
witness marks toward camshaft side of engine. mounting screws to 1315 Ib.-ft. (table 7-3). Now tighten
head bolts to 44-46 lb.-ft. (table 7-3) following sequence in
figure 7-40.

c. Install the intake manifold (para 4-82).

d. Install eight push rods (15, fig. 7-25), rocker arms

(3),rocker arm balls (2), and rocker arm nuts (1).

e. Set valve clearance (para 7-89).

f. Replace rocker arm cover and gasket (para 7-45).

g. Install fuel injectors (para 7-46).

h. Install the two baffles (34, fig. 7-9), and secure

with capscrew (32) and washer (33).

i. Install engine shrouding (para 7-60).

7-45. Rocker Arm Covers (Fig. 7-24)

CRANKSHAFT a. Place gasket (4, fig. 7-24) in position on each

TA100111 cylinder head.
Figure 7-39. Connecting Rod Installation.
b. Install each rocker arm cover (3) to cylinder head
c. Tighten capscrews to specified torque (table 7-3). and secure with four screws (1) and lockwashers (2).
Tighten screws to 8-10 Ib.-ft.
NOTE c. Replace shrouding previously removed
After installation of new connecting rod or (para 7-60).
main bearings, clearances should be
7-46. Fuel Injectors (Fig. 7-23)
checked using plastic gage.
a. Ensure that old gasket material has been
d. turn engine over by hand to see that all bearings removed from injector (4, fig. 7-23).
are free.
b. Assemble new nozzle gasket (5) adapter (6),
e. Install oil base (1, fig. 7-27) with a new gasket (2) gasket (7), and heat shield (8) on injector (4) and press
using ten screws (3) and lockwashers (4). Tighten to together.
specified torque (table 7-3).
c. Install gasket (9) and injector and assembled parts
f. Install cylinder heads (para 7-44). into cylinder head (10).

7-32
 TM 9-2330-356-14

TA100112
Figure 7-40. Cylinder Head Bolt Tightening Sequence.

d. Install retaining flange (3), and tighten down with g. Connect flexible fuel inlet line to pump inlet.
screws (1) and washers (2). Connect fuel return line.

e. Reconnect fuel lines (para 7-55). h Connect each fuel outlet line to the proper pump
outlet (para 4-73 and 7-55)
7-47. Flywheel Assembly (Fig. 7-22)
i. Connect governor linkage to governor arm.
a. Mount ring gear (5), flywheel (3), and hub (4) to
crankshaft using screw (1) and washer (2). j. Start and run engine. Adjust governor linkage if
required (para 4-76).
b. Install blower housing (para 7-60).

7-48. Fuel Injection Pump (Fig. 7-21 )

a. Tune engine flywheel to the port closing mark

(PC) on the front cylinder (closest to blower wheel)
compression stroke (fig. 7-78).

b. If new injection pump is being installed, remove

timing hole screw located on pump mounting flange
(fig. 7-41). Insert a 1/8-inch diameter wire into the hole.

c. Rotate pump face gear until wire slips into place,

locking the gear in position.

d. Mount pump on crankcase (fig. 7-21), ensuring

that shims (5) are in place, and secure in position using
four hexagon nuts (2), flatwashers (4), and lockwashers
(3). If O-ring seal between pump and crankcase is worn,
cracked, or otherwise defective, replace it.

e. Remove wire. Install timing hole screw and

copper gasket.
TA100113
Time injection pump (para 7-86). Figure 7-41. Injection Pump Installation.
f.

7-33
TM 9-2330-356-14

7-49. Oil Filter Adapter (Fig. 7-20) c. Replace air shutter assembly (para 7-60),

a. Clean all gasket material from oil filter adapter 7-53. Engine Junction Box and Electrical Wiring
(19, fig. 7-20) and cylinderblock. Attach oil filter adapter
Refer to paragraph 4-19 for installation.
(19) and new gasket (20) to cylinder block with three
capscrews (17) and lockwashers (18). Tighten capscrews to 7-54. Fuel Stop Solenoid (Fig. 7-16)
45-50 lb.-ft.
a. Connect lead from control switch terminal on
b. Attach all oil lines to oil filter adapter solenoid.
(para 7-50).
b. Position solenoid on bottom cylinder pan and
c. Install oil filter (para 4-72). install two screws. Be sure ground lead is installed by one
of the screws.
d. Install elbow (15). Tighten elbow securely to
c. Adjust solenoid plunger (para 7-85).
position 90 right of top center.
7-55. Fuel Lines (Fig. 7-15)
e. Attach oil cooler hoses 10 oil filter adapter
(para 7-59). a. Install injector lines (7).

f Replace blower housing (para 7-60). b. Install manifold (4) and return lines (5).

7-50. Oil Lines (Fig. 7-20) c. Install injector nozzle return lines (3).
7-56. Governor Linkage (Fig. 7-1 4)
a. Connect oil line (6, fig. 7-20) to elbow (7).
a. Using screws (13), lockwashers (14), and nuts (15),
b. Connect oil line (4) to adapter (5) and restricted attach governor control bracket (12) to engine backplate.
tee (3).
b. Insert end of throttle rod (7) through two washers
c. Connect oil line (2) to adapter (1) and restricted (20) and into hole in control arm (19). Secure with cotter
tee(3). pin (5).

d. Connect oil line (9) to elbow (10) on oil filter c. Attach throttle cable (11) to throttle arm (10)with
adapter (19) and restricted tee (14). clevis pin (9) and cotter pin (8).

7-51. Oil Filler Tube (Figs. 7-18 and 7-19) NOTE

If new ball joints are used on linkage, position
a. Apply adhesive (item 2, Appendix E) to both the new joints to obtain the same length or
sides of new gasket (4, fig 7-19). 1/32 inch more than the old linkage (one turn
equals 1/32 inch). If old linkage length is not
b. Position gasket (4) on filler tube (3). available, position new ball joints about
midway on each end of linkage, then lengthen
c. Position both gasket and filler tube on engine 1/8-inch.
crankcase. Install two capscrews (1) and lockwashers (2),
and tighten. d. Attach governor arm (3) to governor shaft (4) and
install spring (17). Attach opposite end of governor arm to
d. Position fuel filter adapter (1, fig. 7-18) and fuel governor linkage (1). Connect governor linkage (1) to
filters (2) onto engine crankcase. Install three capscrews injector pump (2).
(3) and lockwashers (4), and tighten.
7-57. High Temperature Switch (Fig. 7-1 3)
7-52. Exhaust Manifold (Fig. 7-17)
a. Assemble items 5-13 in order shown in figure
a. Install exhaust manifold (4) and four new gaskets 7-13.
(5) to cylinder heads. Secure with four lock tabs (1), eight
b. Install assembled pressure switch by securing
capscrews (2), and eight washers (3). Tighten capscrews
switch bracket (10) with two capscrews (3) and washers(4).
evenly to 1315 lb.-ft. Bend lock tabs (1) up to prevent
capscrews (2) from loosening. c. Connect two leads (1 and 2) to high temperature
switch.
b. Replace high temperature switch (para 7-57).
Replace exhaust pipe (para 4-77). d. Remove block from louvers on air shutter.

7-34
 TM 9-2330-356-14

7-58. Tachometer Sensor (M967, M969, and e. Attach hoses (8 and 9) to valve of oil filter adapter
M970) (Fig. 7-12) (11).

a. Position sensor in mounting bracket and install f. Replace self-locking screw (1) and retaining
bottom jam nut. clamps (2).

b. Connect two electrical leads to terminals on 7-60. Air Cooling Shrouding (Figs. 7-9 and 7-1 0)
sensor.
a. Bottom Cylinder Pan (3, Fig. 7-9)
c. Loosen top jam nut. Using a feeler gage between
sensor head and flywheel, adjust sensor to obtain a gap of (1) Position bottom cylinder pan (3, fig. 7-9) on
.030- to .035-inch (fig. 7-42). Tighten both jam nuts engine. Install two screws (30).
securely. Recheck gap setting.
(2) Replace all fuel lines (para 7-55).
d. Install blower housing (para 7-60).
(3) Connect governor arm (3, fig. 7-14) to
e. Recalibrate the tachometer para 7-82). governor linkage ball joint (22).

(4) Connect the large lead to the manifold heater

(para 4-20). Connect the fuel shutoff linkage at the
injector pump lever, nylon tube to the oil pressure switch,
the two leads to the oil pressure switch, and the hot lead to
the fuel stop solenoid (para 4-22).

(5) Attach rear cylinder housing, blower housing,

and top air housing cover. Refer to steps b, d, and e.

b. Rear Cylinder Housing (1, Fig, 7-9).

(1) Position rear cylinder housing (1, fig. 7-9) on

engine. Install three capscrews (28) and three washers
(29). Install two screws (27).

(2) If air shutter (fig. 7-8) is installed on engine,

install three capscrews (30, fig. 7-44). If air shroud is not
installed, do not install capscrews (30).

(3) Attach throttle cable to engine throttle

linkage (para 4-75).
TA100114
Figure 7-42. Tachometer Sensor Gap. c. Air Shutter (Fig. 7-8).

7-59. Oil Cooler and Lines (Fig. 7-1 1) (1) Position air shutter on engine and install
three capscrews (30, fig. 7-44).
a. Attach hoses (8 and 9, fig. 7-11) to oil cooler if
previously removed. (2) If blower housing is installed, install two
screws (29) and washers (31). If blower housing is not
b. Install oil cooler (6) on mounting bracket (7) and installed, do not install the capscrews and washers.
secure with capscrews (3), lockwashers (4), and nuts (5).
(3) Thread high temperature switch leads
c. Mount mounting bracket (7) to engine using two through hole in bottom of shutter box and attach to high
capscrews (10). temperature switch (para 7-57).

d. Insert hoses (8 and 9) through governor control (4) Replace high temperature switch
mounting bracket (12, fig. 7-14). (para 7-57).

7-35
TM 9-2330-356-14

d. Blower Housing (6, Fig. 7-9). (4) Attach fuel hoses to fuel tank (para 4-73) and
air cleaner hose to air intake manifold (para 4-74).
NOTE e. Top Air Housing (2, Fig. 7-9).
Be sure to attach the starter shroud to blower (1) Position top air housing cover (2, fig. 7-9),
housing. and secure to engine with four capscrews (18) and washers
(19).
(1) Position blower housing (6, fig. 7-9) on
(2) Position lifting bracket (17) and lifting bracket-
engine. Attach to engine using eight capscrews (23), two
capscrews (24), two washers (25), capscrews (26), capscrew brace (9) on engine head covers. Secure to engine using
(21), and lockwasher (22). spacer (8), capscrew (7), two spacers (16), two vibration
cushions (15), two washers (14), and two capscrews (13).
(2) Tighten capscrew (20). (3) Replace muffler stand (3, fig. 7-10). Attach
with five capscrews (1) and nuts (2).
(3) Attach engine fan shroud (8, fig. 7-10) to
frame (9) and panel (5) with four capscrews (6) and nuts (4) Install muffler (para 4-77). Attach air cleaner
(7). hose to air intake manifold para 4-74).

Section III. REPAIR INSTRUCTIONS

7-61. General c. Maintain cleanliness throughout the overhaul

procedures. Diesel engines are intolerant to even minute
a. This section contains the procedures and particles of dirt. Tools and equipment should also be clean.
specifications for overhaul, reassembly, and checkout of
the auxiliary diesel engine components. The procedures d. Cover all cleaned components to protect them
require use of precision instruments and machinery, and from dust or dirt.
should only be undertaken by qualified technicians.
Special tools are referenced by National Stock Number CAUTION
and Part Number in table 2-1, and should be used where
specified. The overhaul procedures are based on the Ensure that all components are coated with
premise that the engine will be restored to a completely the proper grade of oil as they are assembled.
serviceable condition as prescribed by maintenance Failure to follow this caution may result in
serviceability standards. damage to engine.

b. The diesel engine is a precision-built engine and, During assembly of internal engine components,
e.
therefore, the repair and overhaul standards for coat all components heavily with oil of the same grade to
component parts have been fixed at extremely close be used in the crankcase. During the first few moments of
tolerances. The following should apply to all inspection operation, the engine will depend upon this lubrication.
procedures: Refer to Section I of Chapter 3 for proper lubricants.
(1) The latest inspection equipment, methods, 7-63. Inspection - General
and procedures should be used during component repair
and overhaul. a. Clean all parts before inspection.

(2) Extreme care must be exercised during all NOTE

phases of inspection. Repair and overhaul standards must If the cylinder block Is cracked, the engine
be followed exactly. cannot be overhauled. Be certain to save all
salvageable components.
7-62. Cleaning - General
b. Use Magnaflux or die penetrating technique to
a. Disassemble engine to major components in detect cracks.
accordance with instructions in Section II of Chapter 7.
c. Inspect all milled surfaces for pitting, burrs, and
b. Clean all parts thoroughly and identify location in carbon or dirt buildup. Remove all burrs from bolt holes
engine. on machined or milled surfaces.

7-36
 TM 9-2330-356-14

d. Inspect all mating surfaces. Be certain that they NOT use near open flame or excessive heat.
are clean and smooth to ensure proper gasket sealing. The solvents flash point Is 100F-138F
(38C-59C). If you become dizzy while
7-64. Air Cooling Shrouding using cleaning solvent, immediately get fresh
air and medical help. If solvent contacts eyes,
a. Inspect On Equipment. Immediately wash your eyes with water and
get medical aid.
(1) Shutter Assembly. Inspect shutter assembly
(fig. 7-43) for physical damage. Check for debris within (1) Shutter Assembly. Refer to paragraph c(1) to
assembly. Check for smooth operation of shutters when replace defective components. Repair physical damage by
moved manually. Check for chipped paint or rust. removing dents and welding breaks in shutter assembly
box. Clean repaired area with dry cleaning solvent
(item 11, Appendix E). Paint as required.

(2) Bracket Assemblies. Replace bracket (4, 5, and

6, fig. 7-44) or bearings (7) if required.

(3) Shutters. Bump out dents and straighten

shutters (3, fig. 7-44) if required. Clean with dry cleaning
solvent (item 11, Appendix E) and repaint if necessary.

(4) Air Shrouding and Door. Clean shrouding and

door with dry cleaning solvent (item 11, Appendix E) and
paint if necessary.

(5) Grille. Inspect grille (5, fig. 7-9) or secure

mounting to blower housing (6).

TA502327 (6) Blower Housing. Bump out dents in blower

Figure 7-43. Shutter Assembly. housing (6, fig. 7-9), repair cracks with welds if necessary,
and clean with dry cleaning solvent (item 11,
(2) Bracket Assembly. Inspect that brackets Appendix E). Paint as required.
(fig. 7-43) are securely mounted to shutters. Check that
bracket bearings are not excessively worn. c. Disassembly of Shutter Assembly (Fig. 7-44).

(1) Shutters. Remove eight screws (1, fig. 7-44)

(3) Shutters. Inspect shutters (fig. 7-43) for
physical damage and secure mounting to brackets. and nuts (2) attaching shutters (3) to bracket assemblies (4,
5, and 6). Remove shutters.
(4) Air Shrouding Door. Inspect rear cylinder (2) Brackets.
housing (1, fig. 7-9), top air housing cover (2), air housing
bottom pan (3), and panel door (4) for physical damage. (a) Remove brackets (4). Remove bearings
(7) by removing screw (9) and washers (8).
(5) Grille. Inspect grille (5, fig. 7-9) for secure
mounting to blower housing (6). (b) Remove clips (10) that retain lower rod
(11) in bracket (6) and pivot arm (12). Remove lower rod
(6) Blower Housing. Inspect blower housing (6, and bracket (6). Remove bearing (7) by removing screw(9)
fig. 7-9) for physical damage. Check for secure mounting and washer (8).
of blower housing to engine.
(c) Remove nut (13), clip (14), and ball arm
b. Repair. assembly (15). Remove bracket (5) and associated bearing
(7), screw (9), and washer (8).
WARNING (d) Disconnect springs (16 and 17) from
pivot arm (12). Remove pivot arm (12) by removing nut
Dry cleaning solvent P-D-680 is toxic and (18), lockwasher (19), flatwasher (20), washer (21), bearing
flammable. Always wear protective goggles (22), and bolt (23).
and gloves, and use only In a well-ventilated
area. Avoid contact with skin, eyes, and (3) Shutter Thermo Power Unit. Compress spring
clothes, and DO NOT breathe vapors. DO (24) and remove washers (25) and thermo power unit (26).

7-37
TM 9-2330-356-14

1. Screw (8) 9. Screw (4) 17. Spring 25. Washer (2)

2. Nut (8) 10. Clip (2) 18. Nut 26. Thermopower unit
3. Shutter (2) 11. Lower rod 19. Lockwasher 27. Bracket
4. Bracket (2) 12. Pivot arm 20. Flatwasher 28. BOX
5. Bracket 13. Nut 21. Washer 29. Capscrew (2)
6. Bracket 14. Clip 22. Bearing 30. Capscrew (3)
7, Bearing (4) 15. Ball arm assembly 23. Bolt 31. Washer (3)
8. Washer (4) 16. Spring 24. Spring
TA1OO115
Figure 7-44. Disassembled Air Shutter.

d. Reassembly of Shutter Assembly. (b) Mount bracket (5) to box (28) using
bearing (7), screw (9), and washer (8). Be careful not to
(1) Shutter Thermo Power Unit. Insert thermo confuse bracket (5) with bracket (6). Connect ball arm
power unit in bracket (27, fig. 7-44). Place two washers assembly (15) to bracket (5) and pivot arm (12), using clip
(14) and nut (13).
(25) over end of power unit. Compress spring (24) and
install between bracket (27) and washers (25). (c) Mount bracket (6), along with bearing
(7), screw (9), and washer (8). Mount lower rod (11) to
(2) Brackets. bracket (6) and pivot arm (12) using clips (10).

(d) Install brackets (4), bearings (7), screws

(a) Reassemble pivot arm (12) using bolt (9), and washers (8).
(23), bearing (22), washer (21), flatwasher (20), lockwasher
(19), and nut (18). Connect springs (16 and 17) to pivot (3) Shutters. Mount shutters using eight screws
arm. (1) and nuts (2). Ensure that adequate clearance between

7-38
 TM 9-2330-356-14

shutters and shutter box sides is maintained and that

WARNING
brackets (4) are seated against shoulder of bearings (7)
prior to tightening screws (1) and nuts (2). Check shutters
to ensure that they fully open and close without bending. Particles blown by compressed air can be
dangerous. Be certain to direct air stream
7-65. Oil Cooler and Lines away from the user and other personnel in the
area.

WARNING (2) Using compressed air at 15 psi, test oil cooler

under water for leaks. Dry outside of oil cooler using
Dry cleaning solvent P-D-680 is toxic and compressed air under moderate pressure, and flush inside
flammable, Always wear protective goggles of oil cooler using diesel fuel. Drain thoroughly and flush
and gloves, and use only in a well-ventilated again with clean oil (para 7-62).
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO (3) Straighten all bent cooling fins.
NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F 7-66. Governor Linkage
(38C-590C). If you become dizzy while
using cleaning solvent, immediately get fresh a. Inspect governor linkage components (fig. 7-14)
air and medical help. If solvent contacts eyes, for damaged threads, bent linkage rod, defective spring,
immediately wash your eyes with water and and excessive wear. Replace damaged components.
get medlical aid.
b. Inspect snap-in ball joints for tightness. If ball
joints are worn and come apart easily, replace ball joints.
a. Cleaning. Clean oil cooler (fig, 7-45) inside and
out using dry cleaning solvent (item 11, Appendix E). 7-67. Fuel Stop Solenoid
Flush piping by forcing diesel fuel through oil cooler inlet.
Drain thoroughly and flush again with clean oil a. Disassembly (Fig. 7-16).
(para 7-62).
(1) Remove screw and lockwasher securing
b. Inspection and Repair. ground lead to solenoid, and remove lead (fig. 7-16).

(1) Inspect on cooler (fig. 7-45) for bent or (2) Remove adjusting screw and jam nut.
damaged cooling fins, and cracked or defective welds
which may result in loss of oil. If defective, replace oil (3) Remove retaining rings and plunger cover.
cooler.
(4) Remove spring.

(5) Remove plunger, retainer, and gasket.

b. Cleaning and Inspection.

(1) Wipe all components clean, and inspect for

damaged threads, excessive wear, and defective spring.

(2) Inspect waterproof solenoid plunger cover

for deterioration, cracks, and small holes. Replace all
defective components.

(3) Inspect ground lead for damage due to sharp

bends, kinks, or excessive wear.

c. Assembly (Fig. 7-16).

(1) Position upper retaining ring in waterproof

solenoid plunger cover, and insert plunger spring into
cover over the retaining ring.
TA100116 (2) Insert grooved end of solenoid plunger into
Figure 7-45. Oil Cooler. retainer.

7-39
TM 9-2330-356-14

immediately wash your eyes with water and

CAUTION
get medical aid.
The bottom of the plunger cover must be
sandwiched between the two retainers to (1) Clean gasket mating surfaces using dry
ensure a watertight installation. cleaning solvent (item 11, Appendix E). Wipe dry using a
clean, lint-free cloth (item 24, Appendix E).
(3) Slide the spring, retaining ring, and solenoid
plunger cover over the plunger. Position bottom retaining WARNING
ring over the plunger and against bottom of cover.
Particles blown by compressed air can be
(4) Secure assembled components with external dangerous. Be certain to direct air stream
retaining ring. away from the user and other personnel in the
area.
NOTE
During final installation of the fuel stop sole- (2) Flush oil ports and thread holes clean with
noid, the gasket must be installed between diesel fuel (item 14, Appendix E). Air dry ports using
the solenoid retainer and the solenoid. clean, filtered, compressed air under moderate pressure
of approximately 15 psi.
(5) Connect ground lead to solenoid with screw (3) Soak all metal parts in a clean receptacle
and lockwasher. containing hydraulic fluid (item 18, Appendix E). Wipe
dry using a clean, lint-free cloth (item 24, Appendix E).
7-68. Oil Filter Adapter Clean parts with compressed air as in step (2).

a. Disassembly (Fig. 7-20). (4) Coat all components with oil before
assembly. Refer to Section I, Chapter 3 for the proper
(1) Remove the two 90 tube elbows (11, lubricant.
fig. 7-20).
c. Inspection and Repair.
(2) Remove inverted elbow (10), elbow (15), and
elbow (27). (1) Visually inspect adapter assembly for nicks or
dents on the gasket mating surfaces. Inspect for cracks.
(3) Remove three screws (21) and lockwashers
(22) securing oil bypass cover (23) to the adapter (19). (2) Inspect threaded holes for damaged or
Remove the cover. excessively worn threads. Replace adapter if defective.

(4) Remove the spring (25) and thermostat (26). d. Assernbly (Fig. 7-20).
Discard the thermostat.
(1) Install spring (25, fig. 7-20) and new
(5) Remove and discard the bypass cover gasket thermostat (26) in the adapter assembly.
(24).
(2) Position the cover (23) and new cover gasket
b. Cleaning. (24) over the thermostat and spring. Secure gasket and
cover to adapter assembly with three screws (21) and
lockwashers (22). Tighten screws securely.
WARNING
(3) Install inverted elbow (10). Tighten elbow
Dry cleaning solvent P-D-680 is toxic and securely.
flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated (4) Install two elbows (11). Tighten elbows
area. Avoid contact with skin, eyes, and securely to a position approximately 20 left of top center.
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat. (5) Install elbow (15). Tighten elbow securely to a
The solvents flash point is 100F-138F position 90 right of top center.
(38C-590C). if you become dizzy while
using cleaning solvent, Immediately get fresh (6) Install elbow (27). Tighten elbow securely to
air and medical help. If solvent contacts eyes, the position shown in figure 7-20.

7-40
 TM 9-2330-356-14

7-69. Fuel Injection Pump (Fig. 7-46) (6) Remove the delivery valve holder(9), then lift
out the delivery valve spring (10), delivery valve (11),
a. Disassembly (Fig. 7-46). All work on injection delivery valve body (42), and delivery valve spacer (12).
equipment MUST be performed in the cleanest location
possible. No filing, scraping, or sawing should be done on (7) Remove the hydraulic head locating screw
the bench where repairs are made. (13) and copper gasket (14).

(8) Remove four head retaining screws (15) and

four head retaining clamps (16). Carefully rest tappet on
WARNING clean surface and using shaft head, hammer pump body
assembly until hydraulic head assembly separates from
Dry cleaning solvent P-D-680 is toxic and body assembly.
flammable. Always wear protective goggles
and gloves, and use only In a well-ventilated (9) Remove the O-rings (18 and 19) from the
area. Avoid contact with skin, eyes, and hydraulic head and the pump housing.
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat. (10) Remove the tappet (20) and related O-ring
The solvents flash point is 10OF-138F (21) from the face gear bore.
(38C-590C). if you become dizzy while
using cleaning solvent, immediately get fresh (11) Remove the spring ring (22) and the plunger
air and medical help. if solvent contacts eyes, button (23) from the end of the plunger (the plunger is
immediately wash your eyes with water and part of hydraulic head assembly).
get medical aid.
(12) Invert the hydraulic head assembly and place
it in a suitable arbor press (fig. 7-47).
(1) Clean all external dirt and grease from the
pump. (13) Position tool TSE 76215 (table 5-1) over the
lower spring seat washer (24, fig. 7-46) and depress the
plunger spring, then remove the lower seat (25).
CAUTION
(14) Remove lower spring seat washer (24,
fig. 4-46) and plunger spring (26).
The pump housing must NEVER be clamped
in a vise.
(15) Place the hydraulic head assembly on a
bench. Use two screwdrivers to pry off the face gear (28),
NOTE then remove the thrust washer (29).

A special mounting fixture (table 5-2) must be

made to adequately secure the pump NOTE
housing. The plunger, plunger sleeve and hydraulic
head are mated parts and must always be
kept together. -
(2) Clamp the mounting fixture in a suitable vise.

(16) Do not remove the plunger (35) from the

(3) Install the pump housing into the mounting hydraulic head
fixture with two two - 18 UNC hex head screws.
b. Inspection (Fig. 7-46).
(4) Release lock tabs (2) and remove the two
control unit retaining plate screws (1), tab washers (2, (1) Place the delivery valve assembly in test
fig. 7-46), and the control unit retaining plate and stop fixture TSE 76226 (table 5-l), and secure in a suitable vise
assembly (3). Carefully pull the control unit assembly (4) (fig, 7-48).
with plunger sleeve pin (5) out of the pump housing (6).
Plunger sleeve pin Occasionally may have to be removed (a) Insert the delivery valve spring (1) and
separately. Use needle nose pliers or magnetic pencil. the delivery valve holder (2). Tighten the delivery valve
holder to 70-75 Ib.-ft. Figure 7-77 illustrates the
(5) Remove the delivery valve cap nut (7) and components that are to be assembled to test fixture TSE
gasket (8). 76226 (3).

7-41
TM 9-2330-356-14

1. Retaining plate screw (2)

2. Tab washer (2)
3. Control unit retaining plate
and stop assembly
4. Control unit assembly
5. Plunger sleeve pin
6. Pump housing
7. Cap nut
8. Gasket
9. Delivery valve holder
10. Valve spring
11. Delivery valve
12. Valve spacer
13. Locating screw
14. Copper gasket
15. Head retaining screws (4)
16. Head retaining clamps (4)
17. Head assembly
18. Head O-ring
19, Head O-ring
20. Tappet
21. O-ring
22. Button spring ring
23. Plunger button
24. Lower spring seat washer
25. Seat
26. Plunger spring
27. Spring ring
28. Face gear
29. Thrust washer
30. Plunger drive pin
31. Timing screw
32. Gasket
33. O-ring
34. Plunger sleeve
35. Plunger
36. Control unit bore
37. Pin
38. Flatwasher
39. Lockwasher
40. Nut
41. Control unit lever
42. Delivery valve body
43. Fitting (4)
44. Elbow

TA502328
Figure 7-46. Disassembly of Fuel Injection Pump.

7-42
 TM 9-2330-356-14

(c) Delivery valve opening pressure is

300-600 psi. Delivery valve must hold 275 psi for 30
seconds. Remove delivery valve assembly from test
fixture. The delivery valve spring (1) must be free of nicks
or wear (flat spots). Replace fuel injection pump if springs
are nicked or worn.

CAUTION

Lapping compound must not come in contact

with the relief piston during the lapping
operation, and all lapping compound must be
removed before installing the delivery valve
assembly into the hydraulic head.

(d) If the delivery valve assembly is leaky,

the delivery valve seat may be lapped to its corresponding
seat in the delivery valve body with a small quantity of
suitable lapping compound.
(2) If the plunger bottom (23, fig. 7-46) is
grooved, ridged, scored, or exhibits an uneven wear
pattern, it must be replaced.
(3) Inspect the tappet (20) for possible wear at
TA100118 the contact areas. The primary contact areas are the
Figure 7-47. Removing Lower Spring Seat. tappet contact area and the cam contact area (fig. 7-49).
Replace the tappet if wear indentations exceed
0.002-inch. The tappet thickness measured between the
plunger button contact surface and the cam contact area
must be 0.207-inch or larger.

TA100119
Figure 7-48. Delivety Valve Test Assembly. TA100120
Figure 7-49. Inspecting Tappet
NOTE
(4) The pump housing (6, fig. 7-46) should be
Always check to ensure that all external washed in a cleaning solvent. Check all the screw threads
connections are tight and that the nozzle test in the housing; damaged threads can be repaired using
stand is in good order. thread inserts:
(5) Examine the pump housing for cracks or
(b) Attach test fixture TSE 76226 (3) to a other damage which will cause oil leakage. Replace
manually operated Nozzle Test Stand. complete pump if pump housing is damaged.

7-43
TM 9-2330-356-14

(6) Rotate lever (41) while holding sleeve of (4) Apply a thin coat of petrolatum (item 23,
control unit assembly (4). Shaft must turn freely. If a Appendix E) to the thrust washer (29, fig. 7-46) and
binding condition exists, wash assembly in a cleaning assemble it to the hub on the face gear (28).
agent, and repeat procedure. If binding condition is still
present, injection pump must be replaced. Also ensure (5) Carefully center spring ring (27) on hydraulic
that weld holding lever to shaft is intact. head assembly.

(7) The flat end of plunger sleeve pin (5) must be (6) Position the face gear (28) and thrust washer
checked for clearance in the mating slot of the plunger (29) over the end of the plunger (35), and aline the head of
sleeve. If the clearance is greater than 0.0015-inch, the the plunger sleeve pin (5) with its mating slot located on
injection pump must be replaced. the inside of the face gear (28).

c. Reassembly (Fig. 7-46). CAUTION

Do not use extreme pressure. If gear will not

CAUTION snap Into place easily, remove gear and
check to see that spring ring (27) Is centered,
and that plunger drive pin (1, fig. 7-50) is
Be careful not to damage O-ring gaskets.
properly alined.

(1) After all parts have been thoroughly cleaned (7) Press the face gear (28, fig. 7-46) onto the
and inspected, dip the individual parts in clean diesel fuel hydraulic head (17). Ensure that the spring ring (27) snaps
(item 14, Appendix E). into its mating groove in the face gear (28). Manually
operate the plunger up and down. Free movement of the
(2) Invert the hydraulic head (17, fig. 7-46) and plunger indicates that the face gear has been correctly
place it on a clean bench so that the head locating slot is assembled to the hydraulic head.
forward.
(8) With head still in an inverted position, raise
plunger (35) to its highest position.
(3) Aline the plunger drive pin (1, fig. 7-50) into
the plunger (2) so that the head of the plunger drive pin is (9) Apply grease (item 17, Appendix E) to
in line with the distributor slot. Turn the plunger drive pin exposed portion of plunger to keep it in its highest
until its long side is parallel to the length of the plunger position.
with long end up.
(10) Install spring (26) and spring retaining washer
LONG SIDE OF HEAD PIN 1. Plunger drive pin (24). Snap spring seat (25) into place on the head of
MUST BE PARALLEL TO 2. Plunger plunger (35).
LENGTH OF PLUNGER 3. Hydraulic head
AND UPWARD 4. Plunger sleeve (11) Install the plunger button (23) onto the end of
the plunger and secure it by snapping the spring ring (22)
into its mating groove in the lower spring seat (25).

(12) Ensure that the button spring ring (22) fits

tightly into its groove in the lower spring seat (25). Loose
spring rings (22) must be replaced.

(13) Apply thin coat of petrolatum (item 23,

Appendix E) to inside of tappet (20). Insert the tappet (20)
into the face gear (28).

(14) Apply a thin coat of petrolatum (item 23,

Appendix E) to the hydraulic head O-rings (18 and 19).
Insert O-ring into the head bore of the pump housing (6).
Install the O-ring into its groove on the upper portion of
the hydraulic head. Ensure that O-rings seat properly.
TA100121 (15) Clamp pump mounting fixture in a vise,
Figure 7-50. Assembling Hydraulic Head. install pump housing fixture, then carefully insert the

7-44
 TM 9-2330-356-14

hydraulic head into the pump housing so that the locating plunger sleeve pin (5) is not engaging the
slot in the hydraulic head is in line with the locating screw plunger sleeve slot.
hole in the pump housing (not seating).
If control unit will not seat, pull it out and
repeat steps (20) through (22).
(16) Install the head locating screw gasket (14) and
the head locating screw (13) into the locating screw hole in
the pump housing (6). Slight repositioning of the hydraulic (22) Insert control unit assembly (4) into housing
head may be necessary to properly install the head (6), pressing gently until control unit seats.
locating screw. Do not use force. Tighten screw (13) to
90-100 lb.-in. Install head retaining clamps (16) and screws (23) Install control unit assembly retaining plate,
(15). Alternately tighten screws (15) at opposite comers of as shown in figure 7-51, using two tab washers and two
screws. Tighten screws to 20-25 lb.-in., and bend locking
housing (6) to properly seat the head assembly (17) in the
tabs over screws.
housing. Tighten screws (15) to 13-15 lb.-ft. Insert the
timing screw (31) and its gasket (32) into the timing screw
hole in the pump housing. Tighten the timing screw to
20-25 lb.-in.

(17) Install the delivery valve spacer (12), delivery

valve assembly (11), delivery valve spring (10), and delivery
valve holder (9). Tighten delivery valve holder to
70-75 lb.-ft. Install delivery valve cap nut (7) and gasket
(8). Tighten nut to 55-60 lb.-ft.

(18) Insert pin (37, fig. 7-46) and flatwasher (38)

into lower hole of lever on control unit assembly (4), and
secure with lockwasher (39) and nut (40). Tighten nut to
20-25 lb.-in.

(19) Ensure that O-ring (33) is seated in control

unit. Apply oil to plunger sleeve pin (5) and insert the
plunger sleeve pin (5) into the control unit assembly (4). Figure 7-51. Control Unit Assembly.

(20) Place pump in horizontal position with 7-70. Fuel Injectors

control unit bore (36) facing up.
a. Disassembly (Fig. 7-52).
(21) Center the plunger sleeve (34) in the control
unit bore (36). Position plunger sleeve pin (5) so that the CAUTION
flats aline with the groove in the control sleeve (34), and
the electric pencil mark (dot) faces the top of the pump.
Never clamp injector in a vise which has hard-
ened jaws. Damage to Injector would result.

CAUTION NOTE
When removing and disassembling fuel in-
Do not use force. If flange is not seated on
jectors, separate and label components of
pump housing, rotate arm both ways with each injector. Never Interchange compo-
finger pressure pushing control unit in. nents of injectors.
DO not remove nozzle unless replacement
NOTE
is required.
Rotate the control unit lever (41, fig. 7-46)
through a 360 arc to ensure that the con- (1) Secure fuel injector in a soft-jawed holding
trol unit assembly is correctly installed. fixture, and remove nozzle cap (1), valve (2), and nozzle
Failure to rotate 360 Indicates that the (3).

7-45
TM 9-2330-356-14

(2) Should nozzle be removed, replace nozzle (3) If necessary, clean outer surfaces of nozzle
cap (1) onto nozzle holder (4) loosely to protect lapped cap with a brass brush, but do not attempt to scrape carbon
surfaces of nozzle holder. from nozzle surfaces because severe damage to spring
hole can result.
(3) Remove plug (5) from protective cap (6).
(4) Use a soft, oil-soaked cloth to clean nozzle
(4) Unscrew protective cap (6) from adjusting valve. Clean interior of nozzle cap nut.
screw (8). Remove copper gasket (7). c. Inspection. Inspect tappet surfaces of nozzle
holder for nicks or roughening. If damaged, replace nozzle
(5) Unscrew adjusting screw (8) from nozzle
holder.
holder (4). Be careful-adjusting screw is under spring
pressure. d. Repair. If cleaning will not eliminate an injector
defect, replace injector.
(6) Remove spring (9) and nozzle spindle (10).
e. Assembly (Fig. 7-52).
b. Cleaning.
(1) Secure nozzle holder in a suitable holding
(1) Clean fuel injector parts in a clean room on a fixture.
clean bench. Provide a pan of clean diesel fuel (item 14, (2) Install nozzle spindle (10) into nozzle holder
Appendix E) and a supply of lint-free cloths (item 24, (4).
Appendix E).
(3) Install spring (9) into nozzle holder and then
(2) Never use hard or sharp tools, emery paper, screw adjusting screw (8) into nozzle holder. Do not
grinding powder, or abrasives of any kind. tighten.

Figure 7-52. Disassembled Fuel Injector

7-46
 TM 9-2330-356-14

(4) Install copper gasket (7) over the adjusting 7-71. Rocker Arm Covers
screw (8).

(5) Screw protective cap (6) onto adjusting screw WARNING

(8), but do not tighten.
Dry cleaning solvent P-D-680 is toxic and
(6) Rinse valve (2) and nozzle (3) thoroughly in flammable. Always wear protective goggles
clean diesel fuel (item 14, Appendix E) before assembly.
and gloves, and use only In a well-ventilated
Valve should slide back to seat without aid when nozzle is
area. Avoid contact with skin, eyes, and
held at 45 angle.
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat.
(7) Remove all pressure on nozzle spring (9) by The solvents flash point is 100F-138F
loosening adjusting screw (8). (38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh
(8) Install valve (2) and nozzle (3) into nozzle cap air and medical help. If solvent contacts eyes,
(1). immediately wash your eyes with water and
get medical aid.
(9) Install nozzle cap (1) onto nozzle holder
loosely.
a. Cleaning.

CAUTION (1) Clean rocker arm cover gasket mating surface

(fig. 7-54) using dry cleaning solvent (item 11,
When tightening nozzle cop nut, do not Appendix E). Ensure that mating surface is cleaned free
contact valve in nozzle. of all excess gasket material. Wipe dry using a lint-free
cloth (item 24, Appendix E).
(10) Place centering sleeve TSE 773 (table 5-1 and
fig. 7-53) over nozzle for initial tightening. Remove (2) Flush rocker arm cover oil line with diesel
centering sleeve after initial tightening to prevent it from fuel (item 14, Appendix E) and clean out four drain holes
binding between nozzle and cap nut, and tighten nozzle using a fine cleaning wire (fig. 7-54).
cap nut to 50-55 lb.-ft.

(11) Adjust opening pressure of nozzle

(para 7-87).

Figure 7-53. Centering Sleeve Installation. Figure 7-54. Cleaning Rocker Arm Cover.

7-47
TM 9-2330-356-14

WARNING unless inspection shows that they are

defective,
Particles blown by compressed air can be
dangerous. Be certain to direct air stream b. Cleaning.
away from the user and other personnel In the
area.
WARNING
(3) Dry oil inlet using clean, filtered, compressed
air under moderate pressure of approximately 15 psi. Dry cleaning solvent P-D-680 is toxic and
flammable. Always wear protective goggles
b. Inspection and Repair. and gloves, and use only In a well-ventilated
area. Avoid contact with skin, eyes, and
(1) Visually inspect rocker arm cover for nicks or clothes, and DO NOT breathe vapors. DO
dents on the gasket mating surface. Inspect cover for NOT use near open flame or excessive heat.
cracks, particularly around the area of the lifting bracket The solvents flash point Is 100F-138F
bolt hole. Inspect bolt holes for damaged or excessively (38C-59C). If you become dizzy while
worn threads, Replace rocker arm cover assembly if using cleaning solvent, Immediately get fresh
damaged. air and medical help. If solvent contacts eyes,
Immediately wash your eyes with water and
(2) Inspect oil line for deep nicks or dents that get medical aid.
may obstruct oil flow. Inspect line for cracks or punctures.
Replace oil line if defective. (1) Thoroughly clean all components of the
cylinder head assembly (fig. 7-55) using dry cleaning
7-72. Cylinder Head solvent (item 11, Appendix E) and a stiff brush.
a. Disassembly (Fig. 7-55). (2) Check out oil inlet port (15) using a cleaning
wire, and flush clean with cleaning solvent.
(1) Remove valve stem cap (1).

(2) Using a valve spring compressor (fig. 7-55), WARNING

depress the valve spring (5, fig. 7-55) and remove both
halves of the valve stem lock (2).
Particles blown by compressed air can be
(3) Release valve spring compressor and remove dangerous. Be certain to direct air stream
spring retainer (3), valve spring (5), and valve (8 or 10) away from the user and other personnel in the
area.

NOTE
(3) Dry all tapped holes and oil ports using clean,
The seal assemblies with retainers are dry, compressed air under moderate pressure of 15 psi.
installed on the intake valve guides only.
c. Inspection and RepairCylinder Head Compo-
(4) Remove seal assemblies (4). nents.

(5) Repeat steps (1) through (4) to disassemble studs (1) Cylinder Head Casting and Rocker Arm
remaining intake and exhaust valve components.

(6) Remove the rocker arm studs (11) only if (a) Inspect cylinder head casting (16,
defective. fig. 7-55) using Magnaflux or die penetrating technique to
detect cracks.
NOTE
(b) Inspect all finished surfaces for nicks,
Removal procedures for the valve guides (6 scratches, pitting, or excessive wear.
and 9) and the valve seats (7) will be found in
paragraph 7-72c, Inspection and Repair. Do (c) Inspect all tapped holes for worn or
not remove the valve guides or valve seats damaged threads.

7-48
 TM 9-2330-356-14

Figure 7-55. Cylinder Head Assembly.

7-49
TM 9-2330-356-14

(d) Repair minor damage to the cylinder tool. Allow valve guide to remain 0.3437-inch from top of
head castings using a fine file, emery cloth, or crocus cloth cylinder head.
(item 4, Appendix E) dipped in dry cleaning solvent
(item 11, Appendix E). Repair minor damage to threads (d) Ream the replacement valve guide, if
using a proper size tap. Do not enlarge the threaded hole. necessary, to obtain proper valve stem-to-valve guide
If minor damage cannot be repaired, replace cylinder head clearances shown in table 7-2.
casting (16) and valve seats (7). Salvage all other usable
components. (e) Inspect valve (8 and 10, fig. 7-55) for
warped stem, pitting, evidence of burning and excessive
(e) Inspect studs (11) for stripped or worn wear. Replace valves if badly damaged or if valve stem is
threads, or a bent or loose connection. Replace studs if worn beyond tolerances shown in table 7-2.
damaged, using anti-seize compound (item 5, Appen-
dix E). Tighten rocker arm studs to 35-40 lb.-ft.
CAUTION
(2) Valve Guide and Valve.
If grinding on valve face produces a valve
(a) Check for valve stem-to-valve guide with a thin edge, replace with a new valve.
allowable clearance by measuring inside diameter of valve
guide (6 and 9, fig. 7-55) and outside diameter of the valve (f) Repair valves that can be refaced
stem. Refer to table 7-2 for correct dimensions. grinding to the requirements shown in figure 7-56.

(3) Valve Seat.

NOTE
If valve stem Is worn below minimum toler- (a) Inspect valve seats. Reface valve seats if
ances, replace the valve. If new valve fails to seat face is slightly pitted, burned, or worn and can be
correct stem-to-valve guide clearance, re- refaced to requirements in figure 7-56. If valve seats are
place valve guide. loose, they must be replaced as follows:

(b) Secure valve seat remover cutter tool

(b) Using Correct size valve guide driver tool (fig. 7-57) in a drill press chuck and adjust tool to cut
(table 5-1 and 13, fig. 7-55), remove the valve guide. 1/64-inch from outside edge of valve seat.

(c) Install new replacement valve guide (c) Apply oil to pilot end of cutting tool to
through top of cylinder head using the valve guide driver prevent seizing in the valve guide (fig. 7-55).

Figure 7-56. Valve Face and Valve Seat Grinding Requirements.

7-50
 TM 9-2330-356-14

NOTE (4) Valve Spring.

If the counterbore is damaged, it must be
(a) Inspect valve spring (5, fig. 7-55) for
machined for an oversized valve seat. Valve
evidence of damage. Replace spring if cracked, pitted, or if
seats are available in 0.005- and 0.010-inch ends are out-of-square.
oversize diameters.
(b) Check valve spring for 1.875-inch free
(d) Cut valve seat to a narrow, 1/64-inch rind length.
(fig. 7-57) and remove rind using a sharp tool. Do not
damage valve seat counterbore. (c) Inspect valve spring under load
conditions using a compression scale as follows:

1. Compress spring to 1.528-inch

(valve closed), and check scale for 45-49 lb. compression.

2 . Compress spring to 1.182-inch

(valve open), and check scale for 87-97 lb. compression.

(d) Discard springs that fail to meet above

requirements.

d. Assembly (Fig. 7-55).

NOTE
The valve stem seal assemblies (4) are
installed on the Intake valve guides only.
Figure 7-57, Removing Exhaustt Valve Seat.
(1) Position a new replacement valve stem seal
(e) Clean out valve scat counterbore, re- assembly (4, fig. 7-55) on the intake valve guides only.
move burrs from edges, and check counterbore diameter Apply a film of oil to inside surface of the valve stem seal.
(fig. 7-56).
(2) Apply a film of oil to the valve stem and insert
valve stem up into the valve guide. Check valve for tight
NOTE seal by making pencil marks at intervals on the valve face
and observe if pencil marks rub off uniformly when valve is
To facilitate valve seat installation, heat the rotated 1/4 turn. If not a tight seal, regrind the valves.
cylinder head in an oven at 325F for
approximately thirty minutes and cool the
(3) Using a valve spring compressor, compress
replacement valve seat in dry ice.
the valve spring (5) and spring retainer (3) sufficiently to
permit installation of the valve stem locks (2). Be certain
(f) Install new replacement valve seat. Use the valve spring locks are properly seated before releasing
the valve seat driver tool (table 5-1 and 14, fig. 7-55) to the spring compressor.
ensure that valve seat sets evenly in the counterbore.
(4) Repeat steps (1) through (3) to install
(g) After installation, face each new valve remaining intake and exhaust valve components.
seat to a 45 angle for exhaust valve and a 42 angle for
intake valve, and a width of approximately 3/64- to 1/16-inch 7-73. Piston and Connecting Rod
(fig. 7-56). The finished seat face should contact
approximate center of valve face. Use Prussion Blue dye a. Disassembly (Fig. 7-26).
(item 12, Appendix E) on the valve face to check contact
points with refaced valve seats. Make any corrections to (1) Usings ring expander, remove piston rings (1,
the valve seat, not the valve face. 2, and 4, fig. 7-26) and oil ring expander (3) from each
piston.
(h) Check for 0.0300-inch minimum
clearance between valve head and cylinder head surface (2) Remove two retaining rings (5) and push
(fig. 7-56). If necessary, regrind valve seat. piston pin (6) from each piston.

7-51
TM 9-2330-356-14

b. Inspection and Repair. c. Assembly (Fig. 7-26).

(1) Pistons. Thoroughly clean and inspect each NOTE

piston. Clean carbon from ring grooves and ensure that all
The piston witness mark (notch) must face
oil holes are open. If any piston is badly scored or buffed, front of engine and rod witness marks (num-
loose in cylinders, has badly worn ring grooves, or bers) must face toward camshaft side of en-
otherwise is not in good condition, replace it. Check the gine.
piston clearance in cylinder 90 from axis of piston pin and
below oil control fig (4, fig. 7-26). Clearance should be
(1) Install connecting rods (12, fig. 7-26) on each
0.0055- to 0.0075-inch. If not, replace piston and check
piston (7) with pins (6) and retaining rings (5). If new
cylinder wall for possible reconditioning. bushings (13) were installed, check to see that ends are
flush with the connecting rod (12) to provide for oil
passage in center (fig. 7-58).
NOTE

Piston and pins are matched sets and are not

procured separately.

(2) Piston Pins. Each piston pin should be a thumb

push fit into its piston at room temperatures. If pin is
excessively loose, install a new piston and pin assembly.

(3) Rings. Place each piston ring into its cylinder

bore and using a feeler gage, measure gap where indicated
in figure 7-59. Gap is shown in table 7-2. If gap is under
0.010-inch, file as follows:

(a) Place file in vise.

(b) Grasp piston ring in both hands.

(c) Insert file into ring gap and move ring

down the entire length of file. Be sure to apply equal
pressure on the ring.
Figure 7-58. Connecting Rod and Bushings.
(4) Connecting Rods (Fig. 7-58). Clean connect-
ing reds and check each for defects. Check connecting rod (2) Refer to figure 7-59 and install rings and oil
bushings for proper clearance with piston pin. Clearance ring expander (1,2,3, and 4, fig. 7-26) on each piston (7).
is given in table 7-2. If bushings (13, fig. 7-26) are exces- Compression rings will be marked TOP or identified in
sively worn, press them out and install one new bushing some other manner. Place this mark toward the closed end
from each side of bushing bore. Press new bushings only of piston. Space ring gaps 1/4 of the way around piston from
until flush with sides of rod to leave 1/16-7/64-inch oil groove one another. No gap should be in line with piston pin. Oil
the rings (1,2, and 4) and pistons (7).
in center. Ream bushing I.D. to obtain the proper clear-
ante. Check bore in connecting rod. Bore must be open.
Check connecting rod alinement on a standard alinement NOTE
fixture. Ensure that rod bearings are Installed In the
same position they were In before they were
(5) Connecting Rod Bearings (Fig. 7-26). Inspect removed.
connecting rod bearings for burrs, breaks, pits, and wear.
Measure clearance between bearings and crankshaft (3) Position a bearing half (11) in connecting rod
journal (table 7-2). If necessary, replace with new standard (12) and cap (10). Be sure there is no dirt under bearing.
or under size precision bearings. This could cause high spots and early bearing failure.

7-52
 TM 9-2330-356-14

using cleaning solvent, immediatety get fresh

air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and
get medical aid.

(1) Clean oil bypass valve (3), spring (2), and plug
(1), using dry cleaning solvent (item 11, Appendix E).
Wipe dry using a clean, lint-free cloth (item 24, Appen-
dix E).
(2) Flush oil port clean using clean diesel fuel
(item 14, Appendix E). Wipe external surfaces dry using a
clean, lint-free cloth (item 24, Appendix E).

WARNING

Particles blown by compressed air can be

dangerous. Be certain to direct air stream
away from the user and other personnel In the
area.

(3) Air dry oil bypass valve port, using clean,

filtered, compressed air under moderate pressure of
approximately 15 psi.

Figure 7-59. Piston Ring Installation.

7-74. Oil Bypass Valve (Fig. 7-60)

a. Disassembly.

CAUTION

Use care when unscrewing recessed plug in

rear bearing plate. Tension on the bypass
spring may cause it to fly out.

(1) Unscrew recessed plug (1) in rear bearing

plate (4).

(2) Lift out bypass spring (2) and valve plunger

(3).

b. Cleaning.

WARNING

Dry cleaning solvent P-D-680 is toxic and Figure 7-60. Oil Bypass ValveDisassembled.
flammable. Always wear protective goggles (4) Soak all metal parts in a clean container
and gloves, and use Only in a well-ventilated containing hydraulic fluid (item 18, Appendix E). Wipe
area. Avoid contact with skin, eyes, and dry using a clean, lint-free cloth (item 24, Appendix E)
clothes, and DO NOT breathe vapors. DO and clean filtered air as in step (3) above.
NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F (5) Coat all components with oil prior to
(38C-59C). If you become dizzy while assembly (para 7-62).

7-53
TM 9-2330-356-14

c. Inspection and Repair. b. Cleaning.

(1) Measure diameter of bypass valve (3). If

WARNING
measurement shows less than 0.3365-inch minimum
diameter, replace valve. Maximum diameter should not
Dry cleaning solvent P-D-680 Is toxic and
exceed 0.3380-inch.
flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated
(2) Measure free length of valve spring (3). If area. Avoid contact with skin, eyes, and
free length is less than 2.3125-inch (+/- 0.0625-inch), clothes, and DO NOT breathe vapors. DO
replace valve spring. NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F
(3) Inspect valve spring tension under load (38C-59C). If you become dizzy while
conditions. Using a compression scale, compress valve using cleaning solvent, Immediately get fresh
spring to 1.1875-inch, and check the scale for 2.225 lb. air and medical help. If solvent contacts eyes,
(+ /-0.110 lb.) compression. Immediately wash your eyes with water and
get medical aid.
(4) Inspect plug (1) for evidence of worn or
damaged threads. Replace plug if defective. (1) Clean gearcase gasket mating surface using
dry cleaning solvent (item 11, Appendix E). Ensure that
d. Assembly. mating surface is cleaned free of all excess gasket
material. Wipe dry using a clean, lint-free cloth (item 24,
(1) Assemble bypass spring (2, fig. 7-60) and Appendix E).
valve plunger (3), and install in bearing plate (4).
(2) Flush gearcase clean with diesel fuel
(item 14, Appendix E) and clean out the oil passages using
(2) Install recessed plug (1). Tighten plug
a fine cleaning wire.
securely.

7-75. Gear Cover Assembly WARNING

a. Disassembly (Fig. 7-28). Particles blown by compressed air can be

dangerous. Ensure that air stream is directed
(1) Remove external retaining ring (1, fig. 7-28) away from the user and other personnel in the
securing governor yoke (2) to the governor shaft (5), and area.
remove the yoke (2).
(3) Dry oil passages using clean, filtered com-
(2) Slide governor shaft free of the gearcase. pressed air under moderate pressure of approximately
15 psi.

NOTE c. Inspection and Repair.

Do not remove pressed-in components such (1) Visually inspect gearcase for nicks or dents on
as bearings, seals, and plugs unless there is the gasket mating surface. Inspect for cracks. Inspect bolt
evidence of damage, excessive wear or holes for damaged or excessively worn threads. Replace
looseness. gearcase if damaged.

(2) Inspect all components for evidence of

(3) Set the gearcase on wood supports. excessive wear, scratches, and nicks. Replace defective
components.
(4) Using the combination main and cam bearing
driver tool (table 5-1 and fig. 7-36) and the oil seal driver (3) Measure distance from end of roll pin to
tool (table 5-1 and 13, fig. 7-28), drive out the oil seal (11). mounting face of gearcase. The distance should be
0.781-inch. If necessary to replace pin, the pin should be
positioned with open end facing crankshaft seal.
(5) Using the valve guide driver tool (table 5-1),
drive out the needle bearing (7) and oil seal (6). d. Assembly (Fig. 7-28).

(6) Remove thrust bearing (8) and ball (9) if (1) Install thrust bearing (8, fig. 7-28) and ball
defective. (9), and press bearing into position.

7-54
 TM 9-2330-356-14

(2) Install needle bearing (7) and oil seal (6) from (2) Bearings. Replace bearings if clearances are
outside of gearcase. Ensure that oil seal is flush with greater than limits (table 7-2), or if bearings are worn,
outside surface of gearcase. grooved, or broken.

(3) Join the oil seal loader and driver tool (13) (3) Rear Oil Seal. Inspect seal (17, fig. 7-27) for
together, and slide the oil seal (11) into position with lip wear or damage which might cause it to leak. Use oil seal
toward the driver tool. Remove oil seal loader. driver 420-0250 (table 5-1 and fig. 7-34) to install new seal.

(4) Place the gearcase on a firm flat surface and b. Rebuild Crankshaft. If crankshaft requires
install the oil seal flush with the gearcase outer surface. regrinding, metallize and regrind to standards. Special
procedures must be observed when reworking diesel
(5) Install the governor shaft (5) and check shaft crankshafts. In addition to regrinding, the crankshaft must
for binding. be shot-peened and super-finished. Failure to shot-peen
the crankpin fillets is likely to cause early failure. When
(6) Install the governor yoke (2) on the shaft with the crankshaft is reground, follow this data and figure 7-61
smooth side toward the governor cup, and secure with to shot-peen each crankpin fillet.
external retaining ring (1).
(1) Peen with 0.019-inch diameter cast steel shot.
e. Test and Adjustment.
(2) Peen for 30 seconds on each crankpin fillet.
(1) Work the governor shaft to check for binding.
(3) Mask off connecting rod bearing arms.
(2) Coat all components with oil (para 7-62).

7-76. Governor Cup (Fig. 7-30)

a. Replace any flyballs that have flat spots or

graves.

b. Replace cup if race surface is grooved or rough.

The governor cup must be a free spinning fit on camshaft
center pin, but should be replaced if excessively loose or
wobbly.

c. Check distance the center pin extends from the

camshaft gear. This distance must be 0.781-inch to give
proper travel distance for the cup. If it is less, the engine
may race; if more, the cup will not hold the balls properly.

d. If distance is too great, drive or press center pin

in. If it is too small, replace pin; it cannot be removed
without damaging the surface.

e. If aluminum ball spacer openings are badly worn,

replace ball spacer (camshaft gear must be removed for
this).
Figure 7-61. Crankshaft Peening.
7-77. Crankshaft
7-78. Starter Assembly (Fig. 7-62)
a. Cleaning and Inspection.
a. Disassembly.
(1) Crankshaft. Clean crankshaft and clear out all
oil passages. Check journals for out-of-round, taper, (1) Remove nut (1) and lockwasher (2) from
grooving, or ridges. Pay particular attention to ridges or solenoid (9). Tag and remove lead (3). Disconnect
grooves on either side of oil hole areas. Unusual connector and grommet (4).
conditions here often point to previous neglect of oil
changes. If journal dimensions are not within limits or (2) Remove cotter pin (5) and pin (6) from yoke
journals are scored, metallize and regrind crankshaft to (26). Remove screws (7), lockwashers (8), and remove
standards (table 7-2). solenoid switch (9).

7-55
TM 9-2330-356-14

Figure 7-62. Electric Starter Assembly.

(3) Remove through bolts (10) and lockwashers accessible. Remove lock ring (28) and drive assembly (29)
(11), and remove backplate assembly (12) and thrust from armature (27). Do not disassemble drive assembly.
washers (21). Remove nuts and washers (13) from brush
assembly (15). Raise brush spring (14), and lift brushes (15) b. Cleaning and Inspection.
from brush holder. Remove screws (16) and lockwashers
(17), and remove brush holder (18). Raise springs (14) and
lift other brushes from brush holder. Remove springs (14) WARNING
from brush holder.
Dry cleaning solvent P-D-680 Is toxic and
flammable. Always wear protective
(4) Remove retainer (23), boot (24), and pin (25). goggles and gloves, and use only in a
Separate pinion housing (22) and frame assembly (19). Do well-ventilated area. Avoid contact with
not lose thrust washer (21). Remove other set of brushes skin, eyes, and clothes, and DO NOT
(20) by cutting leads l-inch on each side of welded breathe vapors. DO NOT use near open
connection (fig. 7-63). flame or excessive heat. The solvents
flash point is 100F-138F (38C-59C).
(5) Remove yoke (26), and remove armature (27) If you become dizzy while using cleaning
and drive assembly (29). Remove lock ring and stop (28) by solvent, immediately get fresh air and
pressing stop toward armature until lock ring becomes medical help. If solvent contacts eyes,

7-56
 TM 9-2330-356-14

Immediately wash your eyes with water brush face for deep surface pits, cracks, or chipping.
and get medical aid. Measure brush length. When brush is worn to less than
Particles blown by compressed air can be X-inch, replace. Clean the area around brushes and
dangerous. Be sure to direct air stream commutator with dry, low pressure compressed air.
away from the user and other personnel in (5) Solenoid Switch. Inspect solenoid switch (9)
the area. for cracks, dents, or other damage. Ensure that electrical
terminals are clean and free of corrosion. Check that the
CAUTION rubber boot on the plunger and yoke is in good condition.
After installation, ensure that plunger and yoke move
Do not saturate armature or field coils with freely.
solvent as wire Insulation may be dam-
aged. Do not dip drive assembly in solvent (6) Armature. Inspect armature (27) for wear.
as It Is packed in grease and cannot be re- Inspect commutator for wear. If worn, replace starter.
placed.
(7) Yoke. Inspect yoke (26) for damage or wear.
Never use emery cloth to clean commuta-
tor. (8) Frame Assembly. Inspect frame assembly (19)
for damage. If frame assembly is bad, replace starter.
(1) Cleaning. Clean dust off parts with
compressed air or soft brush. Remove grease and oil with c. Assembly.
dry cleaning solvent (item 11, Appendix E). Remove
discoloration or oxidation from commutator with fine (1) Slide drive assembly (29) onto shaft of
sandpaper grade 00. Clean off sand with compressed air. armature (27). Install stop and lock ring (28) on end of the
Use only sandpaper. armature shaft (27).

(2) Bearings. Inspect bearing in pinion housing (2) Install thrust washer (21) on the end of the
for wear. Replace pinion housing (22) if bearing is armature shaft (27). Slip yoke (26) onto drive assembly
excessively worn. Inspect bearing in backplate assembly (29), and install both in pinion housing (22). Install pin (25)
(12). If excessively worn, replace backplate assembly. in pinion housing (22) to hold yoke (26) in place.

(3) Drive Assembly. Inspect starter drive (29) for (3) If brushes (20) are excessively worn, cut brush
cracks or chipped teeth. Ensure that shaft and spring leads l-inch from the welded connection (fig. 7-63).
under drive moves freely and returns to rear position Install new brushes as follows:
when released.
(a) Using rosin core solder and soldering
(4) Brushes. Lift brush tension springs (14) and iron, or heavy duty soldering gun, tin the remaining
lift each brush (20) from holder for inspection. Check sections of the original brush lead.

Figure 7-63. Brush Replacement,

7-57
TM 9-2330-356-14

(b) Position the new brush lead next to the (4) Remove lead from diode trio (42) to terminal
tinned sections of the original brush lead. Install and on regulator housing (37). Loosen the inner nut (34) and
crimp the brass strip connectors (included) around both pull blue wire (35) from under head of terminal screw.
leads to hold the new brushes in place (fig. 7-63). Remove the regulator (43).

(c) Solder the new brushes in place. Position (5) Lift the brush and spring assemblies (44) from
the brush leads so they do not contact the frame or the regulator housing (37).
interfere with through bolt installation.
(6) Remove three nuts and lift diode trio (42)
(4) Install brush assembly (15, fig. 7-62) and from AC terminal studs (fig. 7-65).
brush washers (13) in frame assembly (19), and install
previously removed lockwasher and nut on stud of brush (7) Remove three self-locking nuts (32,
assembly (15). fig. 7-64), through bolts (5), and washers (6). Carefully
separate the rotor (12) and drive end housing (7) from the
(5) Install brushes (15 and 20) in brush holder stator (14) and slip ring end housing (31). See figure 7-66
(18). Attach brush holder (18) to frame assembly (19) with for typical disassembly. If drive end housing binds on
screws (16) and lockwashers (17). stator, loosen by tapping with a soft hammer. Ensure that
drive end housing separates from stator and that stator
(6) Assemble armature (27), drive assembly (29), remains attached to slip ring end housing to avoid damage
and pinion housing (22) with frame assembly (19). to stator leads.

(7) Install brush springs (14). (8) Remove three nuts (fig. 7-67) which secure
stator leads to terminals and remove stator from slip ring
end housing.
(8) Install thrust washers (21) on the end of the
armature shaft (27) and install backplate assembly (12) on
(9) Remove two nuts (40), washers (39), and nuts
the frame assembly (19) with through bolts (10) and
(38) from positive and negative output terminal bolts (19
lockwashers (11).
and 20). Remove terminal bolts (19 and 20). Tag the
location of the red and black regulator leads on the heat
(9) Install solenoid switch (9) on frame assembly
sinks.
(19) with screws (7) and lockwashers (8) so that bottom
terminal of solenoid (9) goes through connector (4). (10) Remove regulator housing (37). Note the
Attach terminal to connector with hardware on the location of gasket (36) which seals the brush
solenoid switch (9). Connect plunger of solenoid (9) and compartment.
yoke (26) with pin (6). Retain pin (6) with cotter pin (5).
Install boot (24) and retainer (23) over yoke (26). Check (11) Remove three screws (23, fig. 7-64), clamp
that plunger and yoke move freely when solenoid switch is (24), and capacitor (25) connected between the heat sinks
securely fastened to starting motor. (21 and 22).
(10) Connect tagged lead (3) between solenoid (12) Remove two capscrews (15), lockwashers
switch (9) and brush assembly (15). Install nut (1) and (16), and guard washers (17) which retain lower end of
lockwasher (2). Remove tags. heat sinks (21 and 22). Remove heat sinks, and remove
insulating bushings (26) from heat sinks.
7-79. Alternator (Fig. 7-64)
(13) Remove terminal stud insulating bushings
a. Disassembly. (27, 28,29, and 30) from slip ring end housing (31). There
are two bushings in each terminal hole.
(1) Hold the pulley of the alternator in a vise with
soft jaws and remove pulley nut (1, fig. 7-64). Use a (14) Remove slip ring end bearing (13) only if
suitable puller and remove pulley (2) and fan (3). replacement is necessary. Pry flanged dust cap (33) out of
slip ring end housing (31). Press bearing from the inside of
(2) Using a brass drift and hammer, remove the housing outward.
woodruff key (11) from keyway in rotor shaft. Remove
spacer (4). (15) If bearing (8) must be replaced, use a puller to
remove the drive end housing (7) and bearing assembly (8,
(3) Remove four screws which fasten regulator 9, and 10) from the rotor shaft.
(43) in housing (37). Lift regulator from housing and
disconnect red and black leads from regulator. Tag the (16) Remove four screws (10) and bearing retainer
position of the leads for correct assembly. (9), and press bearing (8) out of drive end housing.

7-58
 TM 9-2330-356-14

Figure 7-64. Alternator Assembly.

7-59
TM 9-2330-356-14

Figure 7-67. Removing Stator

Figure 7-65. Removing Diode Trio.
b. Cleaning and Inspection.

WARNING

Particles blown by compressed ah can be

dangerous. Be sure to direct air stream away
from-the user and other personnel in the area.

(1) Use low pressure, moisture-free compressed

air to remove dust and residue.

(2) Carefully inspect all parts for wear, cracks,

breakage, or other defects.

(3) Rotate bearings by hand and check for

binding or wear.

c. Assembly.

(1) If slip ring end bearing (13, fig. 7-64) has been
removed, press a new bearing in place from the outside of
the slip ring end housing (31). Bearing should be installed
with seal facing in toward the slip rings. When properly
installed, the manufacturers part number stamped on the
end of the bearing will be facing toward the outside of the
housing. Bearing should seat against lip on inside end of
bearing bore. After bearing is installed, apply a small
amount of SRI 2 grease to rollers.

(2) Install insulating bushings (27, 28,29, and 30,

Figure 7-66. Dismantling Alternator. fig. 7-64) into slip ring end housing (fig. 7-68).

7-60
 TM 9-2330-356-14

(9) Tighten lower heat sink screws (15) and check

all leads for proper routing. Ensure that no lead is pinched
under heat sink.
(10) Reinstall stator and terminal nuts. It is
advisable to aline stator (14) and housing (31) by
temporarily installing the through bolts (5).
(11) Press drive end bearing (8) into housing (7),
and reinstall bearing retainer (9) and four screws (10).

Figure 7-68. Heat Sink Mounting.

(3) Install insulating bushings (26) into heat sinks

(21 and 22). Position heat sinks in the slip ring end housing
(31) and fasten with two capscrews (15), lockwashers (16),
guard washers (17), and insulating washers (18). Do not
tighten (fig. 7-68).

(4) Install capacitor (25), clamp (24), and three

screws (23). Figure 7-69. Installing Regulator Leads.
(12) Press drive end housing (7) and bearing (8)
(5) Replace the gasket (36) and regulator housing
onto rotor shaft.
(37).
(13) Install rotor (12) and housing (7) assembly
NOTE into stator (14) and slip ring end housing (31) assembly,
being sure to aline mounting ears.
Be sure mating surfaces of heat sinks,
terminals, and terminal screws are clean and (14) Install three through bolts (5), washers (6),
free of paint to ensure a good electrical and self-locking nuts (32). Tighten nuts to 50-60 lb.-in.
connection. Place a small amount of SRI 2 grease in housing and
reinstall the metal dust cap (33) by carefully pressing it
into place.
(6) Install the regulator lead wires to the
terminal bolts. Red wire goes on the positive terminal (15) Install diode trio and three nuts (fig. 7-65).
screw (19), and black wire goes on negative terminal screw
(20). (16) Insert outer brush and spring assembly (44)
into the housing (37), and compress the brush spring. Use
(7) Install terminal bolts through heat sinks, slip a small screwdriver or similar tool. While holding the
ring end housing (31), and regulator housing (37). Ensure spring compressed, insert a pin through the hole in the
that red and black regulator leads (fig. 7-69) are properly rear of the housing so the spring will be held in a
routed through cutaway section of end housing (31). compressed position. (A suitable pin can be made from a
piece of 1/16-inch drill rod.) Install and compress the
(8) Install two nuts (38) on terminal screws (19 remaining brush and spring assembly (44) in a similar
and 20). Tight en nuts. Loosely install two washers (39) and manner. Hold the spring in a compressed position by
nuts (40). pushing the pin farther into the housing (fig. 7-70).

7-61
TM 9-2330-356-14

(17) Attach red and black leads (fig. 7-69) to

regulator (43, fig. 7-64). Attach blue regulator lead to
diode terminal screw by placing the spade terminal under
the head of the screw. Tighten nut on terminal screw
(fig. 7-64). Install regulator, and ensure that the red and
black leads are properly routed through their slots in the
regulator housing (37, fig. 7-64). Install the four screws to
fasten regulator in housing. Remove brush retaining pin
before tightening the screws.

(18) Install diode trio lead and nut.

NOTE
Due to the design of the alternator, a certain
amount of shaft end play will be present in
new or rebuilt units. This end play Is designed
Into the unit and will vary between .004- and
.012-inch.

(19) Install spacer (4), key (11), fan (3), pulley (2),
and nut (1). Tighten nut to 70-80 lb.-ft.

Figure 7-70. Installing Brush Assemblies.

Section IV. TEST AND ADJUSTMENTS

7-80. General exhaust pipe or use sweeping, large radius elbows. Use a
section of seamless, flexible tubing between the engine
a. This section contains the test and adjustment and any rigid pipe to restrict vibration. Increase exhaust
procedures that are required to be performed on a rebuilt pipe one size larger for each additional 10 feet of length.
or repaired engine. These tests must be performed with
engine installed on semitrailer, and with batteries, control c. For engine operating instructions, refer to
boxes, fuel supply filters, and electrical supply hooked up paragraph 2-10.
to the engine.
7-81. Air Shutter Test and Adjustment

WARNING a. Thermo Power Unit Assembly Test. Immerse the

thermo unit (26, fig. 7-44) into a container of oil while
Carbon monoxide is a colorless, odorless, monitoring the oil temperature. Plunger of thermo unit
and deadly poisonous gas which occurs in should start to extend when temperature reaches 120F.
the exhaust fumes of the auxillary power en- Total extension at 140F should be at least 13/64-inch.
gine. Exposure to air contaminated with car- Replace thermo unit if it does not operate properly.
bon monoxide produces symptoms of
headache, dizziness, loss of muscular con- b. Adjustments.
trol, apparent drowsiness, and coma. Perma-
nent brain damage or death can result from
severe exposure to carbon monoxide gas. (1) Shutters (Fig. 7-71). Disconnect ball joint
from upper shutter. Adjust ball joint until upper shutter
closes tightly on lower shutter when lower shutter is held
b. Engine must be properly vented to exhaust the closed. Reattach ball joint to upper shutter.
engine to outside air. If possible, avoid sharp bends in

7-62
 TM 9-2330-356-14

7-82. Tachometer Recalibration

a. Remove six screws which secure the instrument

panel and tilt the panel outward for access to the back of
the tachometer (fig. 4-39).

b. Start engine. Use a stroboscope and flash on

engine-pump coupling. Increase engine speed until
stroboscope reads 2000 rpm.

c. Using a small screwdriver, turn adjusting screw

on tachometer (fig. 7-73) until the tachometer reads
2000 rpm.

d. Release throttle and stop engine.

e. Close the instrument panel and fasten with six

screws.

Figure 7-71. Adjusting Shutters.

(2) Thermo Unit(Fig. 7-72). With engine at room

temperature, loosen thermo unit guide mounting screws.
The mounting holes in the shutter box are slotted. Slide
the assembly to a position where the thermo unit plunger
rests on roll pins with shutters closed. Tighten mounting
screws.

Figure 7-73. Tachometer Calibration.

7-83. High Temperature Switch Test

Refer to paragraph 4-23 for proper test procedures.

7-84. Governor Speed and Sensitivity Adjustment

Refer to paragraph 4-76 for proper adjustment proce-

dures.

7-85. Fuel Stop Solenoid Adjustment (Fig. 7-16)

a. The solenoid plunger should be adjusted so it

fully stops injection when in the de-energized position.

b. To adjust the plunger length, turn the adjusting

screw and jamnut on the plunger bottom in or out.

c. If the plunger sticks, remove the fuel stop

solenoid from its mounting plate (para 7-20). Clean the
Figure 7-72. Adjusting Thermo Unit. plunger and recess in the solenoid.

7-63
TM 9-2330-356-14

7-86. Fuel Injection Pump indicates that a leak is present. The pressure must remain
above 250 psi for at least 30 seconds.
a. Test, After Rebuilding.

(1) Turn pump upside down and depress tappet

with thumb. Tappet should recede 1/16-inch into face gear
(fig. 7-74). If tappet cannot be depressed 1/16-inch into face
gear, plunger sleeve pin (5, fig. 7-46) is improperly alined.
Disassemble pump and re-aline pin (para 7-69).

Figure 7-74. Checking Plunger Sleeve Alinement.

(2) Remove the overflow valve assembly from

the fuel outlet hole in the pump housing. Install a 1/4-inch
pipe plug (fig. 7-75) into the fuel outlet hole.

(3) Secure the pump close to a nozzle test stand.

Figure 7-75. Pressure Testing Injection Pump.
(4) Cap outlet ports (fig. 7-75).
(9) Visual inspection should be as follows:
(5) Install C-clamp on injection pumps to retain (a) Check for leakage by the head locating
face gear (fig. 7-75). screw (13, 7-46).
(6) Aline holes in face gear and housing (b) Fuel leakage at the control unit (4)
(fig. 7-75). indicates that either the O-ring (33) is damaged or the
control unit is defective. Replace entire injection pump.
NOTE
(c) Check for leakage of fuel around the
A fuel inlet stud can be fabricated with a 1/4-18 face gear (28). If leakage is evident, disassemble pump and
NPT pipe die. High pressure tubing must be inspect O-ring (19). If O-ring is damaged, replace injection
used between test stand and the pump pump.
assembly. Always ensure that all external
connections are tight and that the nozzle test (d) Check for fuel leakage between top of
stand is in good order. housing and head flange. Disassemble and check O-ring.
If O-ring is damaged, replace injection pump.
(7) Connect the nozzle test stand to the fuel inlet
b. On Equipment Adjustment and Timing.
hole in the pump housing.
(1) Timing. Time the injection pump to the
CAUTION engine by using the proper thickness timing button
between the pump plunger and tappet (fig. 7-76). Use
method 1 when replacing an old pump if the port closing
Do not exceed a pressure of 400 psi. dimensions and button number of the old pump were
recorded. Use method 2 if the dimensions are-lost; an old
(8) Slowly operate the nozzle test stand until a pump is being timed, or when replacing either camshaft or
pressure of 400 psi is achieved. A rapid drop in pressure crankshaft.

7-64
 TM 9-2330-356-14

(2) Timing Method 1. This is a means for Table 7-4. Button Code Letter and Size.
calculating the correct button thickness before the pump
is installed. It requires the port closing dimensions and
button thickness from the pump being replaced.
Code
Substitute the dimensions for those in the formula below No. Or Letter Part No Size
and calculate the new button thickness. Determine the
button code letter from table 7-4. 16 s 147-0186 0.134
15 R 147-0187 0.131
14 P 147-0188 0.128
Example Formula: 13 N 147-0189 0.125
Port closing dimension of old pump 12 M 147-0190 0.122
(removed from engine) . . . . . . . . . . . . . . . . . . . 1.109 1 A 147-0147 0.119
Button thickness of old pump . . . . . . . . . . . . . + 0.107 2 B 147-0148 0.116
1.216 3 c 147-0149 0.113
Port closing dimension of new pump . . . . . . . . -1.103 4 D 147-0150 0.110
Button thickness of new pump . . . . . . . . . . . . . . 0.113 5 E 147-0151 0.107
Use button C 11 None 147-0161 0.104
6 F 147-0152 0.101
NOTE 7 H 147-0153 0.098
8 J 147-0154 0.095
Always use button thickness closest to this 9 K 147-0155 0.092
dimension. 10 L 147-0158 0.089

Install the correct button in pump (fig. 7-76). Install pump

(para 7-48).

Figure 7-76. Injection Pump Adjustment and Button Removal.

7-65
TM 9-2330-356-14

(3) Timing Method 2. Flow Timing the Pump. injection pump. This can be done on the unit by turning
engine switch to RUN. Rotate flywheel about l-inch
counterclockwise so that P.C. mark (fig. 7-78) is below
CAUTION timing pointer hole.

When removing tappets which contain timing (e) Rotate blower flywheel clockwise until
buttons, do not allow the portion of the injec- fuel flows from Number 1 cylinder fuel line. Continue
tion pump which has the face gear to be lifted rotating slowly clockwise until fuel stops flowing. The
from its position. point at which fuel stops flowing from Number 1 cylinder
fuel delivery line is the injection pump port closing point.
Stop rotation of engine at exactly the port closing point (1
(a) Install a Number 11 or standard timing
to 2 drops in 5-10 seconds).
button in injection pump. Install pump on engine
(para 7-48). (f) Check timing pointer in the timing port
on the side of the generator adapter (fig. 7-78). If timing
(b) Remove delivery valve cap nut and pointer coincides with the P.C. mark stamped on flywheel,
delivery valve holder (fig. 7-77). A 12-point socket or box the injection pump button thickness is correct. If the P.C.
wrench must be used on delivery valve holder to keep mark on the flywheel is below the pointer, injection pump
from damaging this part. Lift out delivery valve spring is closing early, and will require a thinner button. If the
only, and leave it out, replacing delivery valve holder and P.C. mark on flywheel is above the pointer, injection pump
delivery valve cap nut and gasket. is closing late and will require a t bicker button. Each mark
on flywheel indicates a difference of 0.006-inch button
(c) Turn flywheel (fig. 7-78) clockwise until thickness or two steps in button code number. (Example:
Number 1 cylinder (closest to blower wheel) is on com- The P.C. mark on flywheel is above pointer. The pointer
pression stroke, which follows closing of intake valve. indicates 1 marks difference. A button 0.009-inch
thicker or three steps difference in button number code is
(d) Set control unit lever on injection pump indicated. Since Number 11 button is installed, a letter C
to wide open or up position (compress stop solenoid button is needed.)
plunger spring or remove stop solenoid assembly).
Connect Number 1 cylinder fuel line to Number 1 pump (g) Remove injection pump and insert
outlet so that fuel line projects from the engine, hanging proper timing button, taking the same precautions not to
down (fig. 7-15). Position receptacle for fuel under the lift the assembly containing face gear when removing
line. Connect lines from fuel supply to transfer pumps, timing button.
transfer pumps to filter, and filter to injection pump.
Operate fuel transfer pumps to obtain fuel pressure at (h) Repeat injection pump installation.

Figure 7-77. Delivery Valve.

7-66
 TM 9-2330-356-14

Figure 7-78. Top Center and Port Closing Marks

7-67
TM 9-2330-356-14

(i) Check injection port closing point by d. Remove Number 2, Number 3, and Number 4
repeating steps (c) through (f). The timing pointer should cylinder injection nozzles and holder assemblies from
indicate the PC mark on flywheel. In no case should engine, and reconnect fuel inlet and return lines. Use
pointer be more than mark away from the P.C. mark. additional lines and fittings of same gage and material as
required to direct nozzle away from engine.
(j) Install delivery valve components. Be
sure all parts are clean, and assembled carefully and prop-
erly. The delivery valve holder must be assembled with a WARNING
twelve-point wrench, and retightened to 70-80 lb.-ft. The
cap nut must be retightened to 55-60 lb.-ft. Do not allow nozzle spray to contact skin.
Diesel fuel under pressure can penetrate
7-87. Nozzle Assembly Test and Adjustment flesh and cause serious injury and infection.
The nozzle and holder assemblies are designed to open at
1900-1950 psi. However, after several hundred hours of e. Crank engine and observe pressure gage at
operation, the nozzle pressure will decrease to an moment fuel is ejected from nozzle. The pressure gage
acceptable 1750 psi. To test and adjust the nozzle should read at least 1750 psi opening pressure.
assemblies, it will be necessary to use a nozzle pressure
f. To adjust opening pressure, remove set-screw and
tester or pressure gage that reads at least 2000 psi. The
following steps describe test procedures using a pressure back off adjusting nut cover several turns. Insert allen
wrench through adjusting nut cover and into adjusting
gage.
nut. Turn adjusting nut clockwise to increase pressure and
a. Remove Number 1 cylinder nozzle and holder counterclockwise to decrease pressure. Some chattering
assembly from the engine. of the nozzle is normal during pressure test.
b. Disconnect fuel inlet line at nozzle and holder NOTE
assembly. Attach nozzle inlet line from fuel injection
pump to inlet end of pressure gage. If streamers of fuel are visible or the nozzle
drips before It reaches opening pressure of
c. Attach a flexible line to outlet end of pressure 1750 psi minimum, the nozzle is either dirty or
gage and to inlet end of nozzle. Be certain nozzle-to-fuel defective. If dirty, clean nozzle and valve. If
injection return line is attached. defective, replace nozzle and valve together.

CAUTION g. After adjusting nozzle opening pressure,

continue to crank the engine and observe the nozzle spray
During nozzle test procedures, all nozzles pattern. A good spray pattern (fig. 7-79) will be cone
must be removed from the engine. Failure to shaped with a solid appearing center surrounded by
do so may result In damage to the engine. cloud-like fog, with the spray evenly atomized.

Figure 7-79. Nozzle Spray Pattern.

7-68
 TM 9-2330-356-14

h. Disconnect pressure gage from Number 1 is on its compression stroke, which follows the closing of
cylinder nozzle and holder assembly. Attach fuel inlet and its intake valve. See figure 7-80 for identification of intake
return lines, and then repeat above procedures to test and valve assembly.
adjust Number 2 cylinder nozzle and holder assembly.
(2) Continue clockwise rotation until TC (top
i. Repeat step h for Number 3 and Number 4 center) mark on flywheel lines up with timing pointer on
cylinder nozzle and holder assemblies. gear cover (fig. 7-78). Then turn flywheel in a clockwise
direction for an additional 10-450. The timing mark for
7-88. Valve Rocker Arm Adjustment this position must be established. In this position, the
piston will be in its power stroke with both valves
NOTE completely closed.
Readjust rocker arm-to-valve clearance after
the first 50 hours of operation on a new or (3) Using a feeler gage, check the clearance
rebuilt engine. between the rocker arm and the valve stem cap (fig. 7-80).
Increase or reduce the clearance until the proper gap is
a. Check and adjust the rocker arm to proper valve established, adjusting the lock nut which secures the
clearance every 500 operating hours. rocker arm to the cylinder head. Correct valve clearance is
0.009-inch for intake valves and 0.007-inch for exhaust
b. Always check and adjust the valve tappet valves.
clearance when the engine is at an ambient temperature
of approximately 70F. Remove rocker cover and proceed (4) To adjust the valve clearance for Number 2
as follows: cylinder, turn the blower wheel clockwise 180 until the
flywheel is 10-450 past the BC (bottom center) mark and
adjust valves as given in step (3).
CAUTION
7-89. Cylinder Head Compression Test, On
Turn blower wheel clockwise only. Equipment

(1) Using a 5/8-inch socket wrench and extension, a. Remove shroud door panel on engine to gain
turn the blower wheel clockwise until Number 1 cylinder access to the air intake manifold.

Figure 7-80. Checking and Adjusting Rocker Am-to- Valve Clearance.

7-69
TM 9-2330-356-14

b. Remove air intake manifold (para 4-82). 7-90. Starter Tests

c. Remove four fuel injectors (para 7-28). a. On Equipment Test. Refer to paragraph 4-79 for on
d. Insert a compression gage and adapter (table 5-1 equipment test.
and fig. 7-25) into the Number 1 cylinder fuel injector
b. Bench Tests.
opening in the cylinder head. Secure the adapter to the
cylinder head with two 5/16-18 NC x 3/4 capscrews. (1) Testing Starter.
NOTE (a) If starting motor tests are required,
The best indication of compression leakage remove the motor from the engine and test it on a bench.
is the pressure difference between cylinders. Test the free-running voltage and current.
Compression of a standard new engine
cranking at about 300 rpm is approximately (b) Using a spring scale and torque arm, test
350-400 psi. Maintenance should be the stall torque (Fig. 7-81). Multiply the spring scale
considered If pressure is below 325 psi or If reading by the arm length for the torque value.
there Is a 15% or more difference between
cylinders. (c) If free running speed is low, and starter
has a high current draw with low stall torque, check for
e. Turn the engine START switch to the start tight, dirty or worn bushings, bent armature shaft, or loose
position to crank the engine. Record the compression field pole screws, allowing armature to drag. Check also
reading on the gage as the engine is being cranked. for shorted or grounded armature and field.

f. Remove the compression gage and adapter. (d) A low free speed with low torque and
Insert adapter in Number 2 cylinder fuel injector opening. low current draw indicates an open field winding, high
Secure with two capscrews. internal resistance due to poor connections defective
Turn the engine START switch to the start leads, broken or worn brushes, or scored, worn, or dirty
g. commutator.
position and crank engine. Record the compression
reading on the gage as the engine is being cranked. (e) High free speed with low developed
h. Repeat steps f and g for Number 3 and Number 4 torque and high current draw indicates shorted fields.
cylinders. Since there is no easy way to detect shorted field coils,
replace and check for improved performance.
i. Install fuel injectors (para 7-46).
Install air intake manifold (para 4-82). (f) The voltage drop across the solenoid on
j. the starting motor should be less than 1.5 volts. If not,
k. Replace shroud door panel. remove it for repair.

Figure 7-81. Testing Stall Torque.

7-70
 TM 9-2330-356-14

(2) Testing Armature. (c) Testing Amature for Open Coils. Test coils
for continuity with ohmmeter. A resistance reading
(a) Testing Armature for Grounds (Fig. 7-82). indicates open coil.
Touch armature shaft and the end of each commutator bar
with a pair of ohmmeter leads. There should be no conti- (d) Tessting Commutator Runout (Fig. 7-84).
nuity. If continuity is indicated between any commutator Place armature in a test bench and test runout with a dial
bar and shaft, it indicates a grounded armature. Replace indicator. When commutator runout exceeds 0.004-inch,
starter. replace starter.

Figure 7-82. Testing Armature for Grounds.

(b) Testing Armature for Shorted Coils Figure 7-84. Checking Commutator Runout.
(Fig. 7-83). A growler is necessary to test for shorted coils.
With the armature in the growler, turn the growler on and (e) Testing Armature Shafl Runout
run a steel strip (such as a hacksaw blade) over the arma- (Fig. 7-85). Place armature in a test bench and check shaft
ture surfaces. If a coil is shorted, the steel strip will be- runout with a dial indicator. If the shaft is bent or worn,
come magnetized and vibrate. Rotate the armature starter must be replaced. Runout should not exceed
slightly and repeat the test. Do this for one complete revo- 0.006-inch.
lution of the armature. If the armature has a short, replace
starter.

Figure 7-85. Checking Armature Shaft Runout.

(3) Testing Field Coils.

(a) Using a test lamp and probes, check the

field coils for grounding to the motor frame or open
Figure 7-83. Testing Armature for Shorted Coils. circuit.

7-71
TM 9-2330-356-14

(b) Inspect all connections to be sure that ment. Press on solenoid core to shift the pinion into full
they are properly clinched and soldered. Inspect the mesh. Measure the clearance between pinion and pinion
insulation for evidences of damage. stop (fig. 7-87). Clearance should be 0.07 to 0.12-inch. Ad-
just the link screw on the end of the solenoid plunger for
(c) The only way to check for field coil
proper clearance.
shorts is to use the starting motor bench test.

(4) Testing Brush Springs (Fig. 7-86). Measure

brush spring tension with a tension meter. Push the brush
and take a reading just as the brush projects a little from
the brush holder. On a new brush the spring tension
should be 32-40 ounces. If brush spring tension is below 20
ounces, replace. Spring tension can be changed by twisting
the spring at the holder with long nose pliers.

Figure 7-86. Testing Brush Spring Tension.

(5) Testing Solenoid Switch (Fig. 7-87).

(a) Ensure that plunger moves freely in coil.

Measure the pull-in coil current draw by using Test A.
Current should not exceed 16 amps.
Figure 7-87. Testing Solenoid Switch.
(b) Measure the hold-in draw using Test B.
Current should not exceed 6 amps.

(c) Total hold and pull current draw using

Test C is 22 amps. Total current draw should not exceed 25
amps.

(d) Replace a solenoid that does not meet

these test specifications.

c. Test After Reassembly.

(1) After the motor is assembled, check the

armature end play by inserting thickness gage between
thrust washer (21, fig. 7-62) and pinion housing (22). End
play should be between 0.005-inch and 0.030-inch. Adjust
end play by adding or removing thrust washers (21,
fig. 7-62) on the commutator end of the armature.

(2) Before installing, check the pinion clearance.

Proper clearance is important to ensure starter engage- Figure 7-88. Checking Pinion Clearance.

7-72
 TM 9-2330-356-14

7-91. Alternator Test and Adjustments

a. Test, On Equipment. Before doing the following

test, check battery condition (para 3-6 and 4-23),
alternator drive belt (para 4-78), and wiring and
connections (para 4-16).

(1) Connect an accurate voltmeter across the

batteries and check battery voltage with engine not
running. Record the voltage.

(2) Now start the engine and run it at

approximately 1000 rpm. The voltmeter should show an
increase from the reading obtained in step (l). If the
voltage rises excessively (over 14.2V), the charging system
may be defective or the voltage regulator needs
adjustment.

NOTE
Do not attempt to adjust regulator voltage if
Figure 7-89. Voltage Adjustment.
batteries are in low state of charge. System
voltage will Increase as the batteries receive
c. Bench Test. This test can be performed to
a charge.
determine if the fault is in the alternator, voltage
regulator, or diode trio. Because the voltage regulator is
b. Voltage Adjustment. If batteries are constantly built into the alternator, the test block arrangement is
undercharging or overcharging, and all other causes, such simple. If a commercial test block is not available. use the
as bad connections, damaged wiring, or slipping drive belt arrangement shown in figure 7-90.
have been checked, make the following adjustment:

(1) Connect an accurate voltmeter across the

batteries and run engine at approximately 1000 rpm.

CAUTION

Do not attempt to turn the adjustment screw

past its internal stops or damage will result.

(2) Remove nylon screw (fig. 7-89) from voltage

regulator. Turn adjustment screw with a small screwdriver
and attempt to bring voltage to proper setting
(13.6-14.2V). The ideal setting will be a value which
maintains the batteries in a fully charged condition
without excessive water usage.

(3) Install nylon screw after adjusting to prevent

entrance of dirt and water. Figure 7-90. Test Block Arrangement.

(4) If output voltage is excessively high and (1) Connect one end of a short jumper lead to
cannot be lowered by turning the adjustment screw, negative output terminal. Connect opposite end of
replace voltage regulator. jumper lead to a short stiff piece of wire at least 11/2-inches
long. Insert this wire into the small hole in end of brush
(5) If output voltage is low and cannot be holder so that it firmly contacts the outer brush terminal
increased by turning the adjustment screw, remove the (fig. 7-91). This procedure overrides the voltage regulator
alternator for further testing and repair. and gives a full field condition.

7-73
TM 9-2330-356-14

and their contact screws for dirt or corrosion, and clean as

necessary. Retest alternator. If problem still exists, disas-
semble the alternator for further tests and inspections.

(4) The alternator may also be checked for

output across each phase by using a test light (fig. 7-92).
The test light should be a two filament sealed beam unit
connected so the filaments are in parallel. Such a light will
act as a load as well as an indicator. The test light should
illuminate with equal brilliance on each phase (Test A, B,
and C). If the light is noticeably dimmer on one or two
phases, a defective diode trio, stator, or power diode is
indicated.

Figure 7-91. Full Field Test.

(2) With alternator turning at approximately

1000 rpm, note the voltmeter reading. If the voltmeter
rises as contact is made between the short piece of wire
and the outer brush terminal, the alternator is good.
Remove the diode trio and test. If the diode trio tests okay,
the voltage regulator should be replaced.

(3) If the voltage fails to rise during the full field

test, remove the voltage regulator and carefully inspect it
for a printed circuit path that is burned open. This will
generally be the track from the positive regulator terminal
to one brush terminal. If this condition is found, replace
the voltage regulator. Also check the brush spring caps Figure 7-92. Three Phase Test.

7-74
 TM 9-2330-356-14

CHAPTER 8
REPAIR OF PUMP, VALVES, AND DISPENSING EQUIPMENT

Section 1. GENERAL

8-1. Scope warning may result in serious injury or death

to personnel.
This section contains procedures for disassembly,
cleaning, repair, and assembly of the pump, valves, and
dispensing equipment which are beyond the scope of the a. Read and observe all safety precautions in the
using organization. Warning Summary before beginning work.

8-2. Precautions b. Drain all valves and piping in the area before
attempting to remove or disassemble valves or system
components.
WARNING
c. Ground semitrailer to an approved (earth)
Read and observe all safety precautions in ground.
Warning Summary before performing mainte-
nance on pump, valves, and dispensing d. The area must be rated safe.
equipment. Ensure that semitrailer is
grounded to an approved (earth) ground and e. Ensure that work area is kept clean. Cleanup any
it is safe to proceed. Failure to follow this fuel spills IMMEDIATELY.

Section II. CENTRIFUGAL PUMPS

8-3. Pump, 4-inch (M967, M967A1, M969, and (5) If leakage is indicated, tighten flange
M969A1) (Fig. 8-1) connections and repeat test before removing pump for
repairs.
a. Air Leakage Test. Before removal, the following b. Removal. Remove pump and coupling (para 5-22).
test can be performed to determine whether pump or a
loose connection is the cause of problem. Air leaks at the c. Disassembly (Fig. 8-1).
inlet of pump will cause noisy operation and decreased
pump outlet. A vacuum gage is needed for this test. (1) Remove pipe plug (30) on bottom of
intermediate housing (3) and drain the lubricant.
(1) Remove a pipe plug (31) in the suction side of (2) Remove eight nuts (1) and lockwashers (2).
the pump. Use pipe seal compound on the pipe threads. Use a soft hammer to loosen the intermediate housing (3)
Install a vacuum gage in the plug. and seal plate (15). Carefully remove the intermediate
housing, seal plate, and impeller (20) as an assembly from
(2) Make sure the pump is filled with fluid, and volute (23). Discard gasket (19).
start the pump.
(3) The impeller (20) is threaded on the impeller
shaft (8). The impeller will unscrew in the same direction
(3) At operating speed, the pump should pull a as the pump runs. To remove impeller:
minimum of 20-inches of vacuum. This indicates that the
gaskets and seals are good. (a) Put a strap wrench around discharge
surface of the impeller as near as possible to the seal plate
(15).
(4) Stop the pump. Observe whether vacuum
remains at the maximum developed by the pump. If (b) If pump coupling was removed earlier,
vacuum falls off rapidly, an air leak exists. Be sure that temporarily install the pump coupling and wedge a pry bar
leakage is not coming from pipe plug or vacuum gage between coupling and intermediate housing to hold the
connection. impeller shaft.

8-1
TM 9-2330-356-14

Figure 8-1. Centrifugal Pump, 4-inch (M967, M967A1, M969, and M969A1).

8-2
 TM 9-2330-356-14

(b) Then remove enough shims to move the

WARNING
impeller away from the wear plate a distance of 0.015-inch.
Be careful when removing the Impeller from (c) Rotate the pump by hand to make sure
the pump. The spring load on the mechanical the impeller is not binding or scraping.
seal may cause the impeller to fly off the shaft
as it is being removed, causing serious injury (d) Minor nicks on edges of impeller vanes
to personnnel. can be removed by finishing with a fine stone.

(e) If the impeller and wear plates are worn

(c) Apply force to strap wrench in a
excessively, they must be replaced.
count counterclockwise direction. Using a block of hard wood
and a hammer, hit the hub of impeller to loosen it on the (f) After replacement of the impeller, wear
shaft. Remove the impeller by unscrewing it from the plate, or impeller shaft, check for clearance between the
impeller shaft. BACK of the impeller and the seal plate. If the impeller
scrapes when the seal plate (15) is installed, add another
(4) Pull the seal plate (15) and the mechanical gasket (19) of sufficient thickness between the seal plate
seal (16) from the impeller shaft. and the pump casing.
(5) Remove four capscrews (12) and lockwashers (2) Mechanical Seal (16). Inspect the mating
(13) from bearing cap (11). Remove the bearing cap and surfaces of the seal for wear, scoring, grooves or other
discard gasket (10). damage which can cause leakage. If any of the seal parts
are worn, replace the entire seal. Never mix old and new
(6) Remove pump coupling (28) and key (29) parts of a seal.
from opposite end of shaft, if these items were not already
removed. (3) Impeller Shaft (8). Inspect the impeller shaft
for nicks, scratches, scoring or other damage. Replace the
(7) Using a soft hammer, hit the keyed end of the shaft if damaged.
impeller shaft to remove the shaft (8), bearings (9 and 6),
and spacer (7) from intermediate housing (3). (4) Bearings (6 and 9). Rotate bearings by hand
and check for binding or wear. Replace bearings if wear is
(8) Remove seal (5) from intermediate housing. found. The bearings are a light press fit on the impeller
Discard the seal. shaft and a snug push fit in the housing. If the shaft is worn
so the bearing slips on and off easily, the shaft must be
(9) Remove the seal (14) from the bearing cap replaced. Replace the housing if the bearings do not fit
(11). Discard the seal. snugly into the bearing bore.

(10) Remove snap ring (27), bearing (9), and (5) Gaskets and Seals. Whenever a pump is
bearing (6) from impeller shaft (8). overhauled, ail gaskets should be replaced. However, if
old gaskets must be reused, soak the gaskets in water to
(11) The wear plate (21) is fastened to the volute prevent them from drying out and shrinking. Inspect all
with two nuts (25) and lockwashers (26). Remove the wear seals carefully and replace any that are damaged.
plate only if excessive wear is evident and replacement is
Assembly (Fig 8-1).
necessary (step e).
(1) Install new seal (5) in bore of intermediate
d. C[eaning. Refer to paragraph 5-8. housing. Lip of seal must be toward the impeller.
e. Inspection and Repair (Fig. 8-1). NOTE
(1) Impeller and Wear Plate. The open impeller Loading groove in bearings must be installed
(20) uses a wear plate (21) in front of the impeller vanes to toward the shoulder or center (largest
minimize internal pump leakage. This wear plate normally diameter) of the impeller shaft.
receives most of the wear. Pump efficiency will decrease
considerably when the clearance between the wear plate (2) Press bearing (9) over threaded end of
and impeller exceeds 0.035-inch. Normally, shims (18) can impeller shaft (8) and install snap ring (27).
be added to bring clearance within limits.
(3) Put spacer (7) onto impeller shaft against
(a) Add shims until rubbing just starts to bearing just installed. Press bearing (6) with loading
occur when the impeller and wear plate are secured in groove towards spacer onto keyed end of impeller shaft
place. (fig. 8-2).

8-3
TM 9-2330-356-14

Figure 8-2. Pump Intermediate Housing Assembly.

(4) Install impeller shaft and bearing assemblv. into the seal plate (4, fig. 8-3). Push the seal assembly
into intermediate housing (fig. 8-2). Use a soft hammer to squarely and firmly into the bore of the seal plate.
tap the shaft and bearings into position.
(b) Make sure the impeller shaft is clean
(5) Install new seal (14, fig. 8-1) in bearing cap and smooth. Apply light oil to the surface of the shaft
(11). Lip of seal must be towards the inside of cap. where the seal will contact it.

(6) Put anew gasket (10) on flange of bearing cap (c) Slide the seal plate onto end of impeller
(11) and carefully slide the bearing cap over threaded end shaft, using care not to damage the stationary seal.
of the impeller shaft. Use care not to damage the seal (14).
Fasten bearing cap to intermediate housing with four (d) Slide the rotating seal parts on the
capscrews (12) and lockwashers (13). impeller shaft as far as they will go.

(7) Install mechanical seal and seal plate (e) Install the spring of the rotating seal,
(fig. 8-3). Use care to keep the seal parts free from dirt and making sure that it is seated properly.
other foreign material.
(f) Install spring seat (2, fig. 8-3) and
(a) Apply coating of lightweight oil to the impeller, using shims (1, fig. 8-3) as required to obtain
O-ring of the stationary seal, then install the seal assembly proper running clearance on the impeller (step e).

8-4
 TM 9-2330-356-14

Carefully separate the intermediate housing and seal

plate as an assembly from the volute (7). Discard gasket
(11).
(a) To remove impeller (10), use
instructions in paragraph 8-3c.
(b) The enclosed impeller uses a wear ring
(9) to keep internal pump leakage at a minimum. When
the clearance exceeds the limits shown in figure 8-4, the
impeller and/or wear ring must be replaced.
(c) To remove wear ring (9), use a suitable
puller.

Figure 8-3. Installation of Mechanical Seal.

(8) After adjustment for proper running

clearance is made, tighten impeller securely.

(9) If wear plate (21, fig. 8-1) was removed, install

new wear plate in pump casing and fasten with two nuts
(25) and lockwashers (26).

(10) Put anew gasket (19) over studs (22) of volute.

Install seal plate assembly and intermediate housing
assembly (3). Check and adjust the clearance between the
impeller vanes and the wear plate (step e). Install
lockwashers (2) and nuts (1) and tighten securely.

(11) Install pipe plug (13, fig. 8-2). Refer to Section

I, Chapter 3, and fill the intermediate housing with the
proper lubricant. Figure 8-4. Wear Limits of Impeller and Wear Ring.
(2) Seal Plate and Mechanical Seal. The
g. Installation. Install pump and coupling
arrangement for the mechanical seal is the same as the
(para 5-22). 4-inch pump. Use the following procedure to remove the
seal:
8-4. Pump, 3-inch (M970 and M970A1)
(a) Remove pipe plug (34) on bottom of
a. Air Leakage Test. Perform preliminary test before intermediate housing and drain lubricant.
removing pump (para 8-3a).
(b) Remove impeller (10) using instructions
b. Removal. Remove pump and coupling (para 5-22). in paragraph 8-3c.

c. Disassembly (Fig. 8-5). (c) Remove eight capscrews (28) and

lockwashers (27) and pull the seal plate (15) and
(1) Impeller (10) and Wear Ring (9). For access to mechanical seal (14) from the impeller shaft as an
the impeller, remove nuts (17) and lockwashers (16). assembly.

8-5
TM 9-2330-356-14

Figure 8-5. Centrigual Pump, 3-inch (M970 and M970A1).

8-6
 TM 9-2330-356-14

(3) Intermediate Housing Assembly. The (3) If wear ring (9) is being replaced, install new
arrangement of the bearings, spacer, seals, and impeller wear ring in bore of volute (7). Make sure the ring is
shaft in the intermediate housing are the same as the squarely and firmly seated in the bore.
4-inch pump. To disassemble the intermediate housing,
use instructions in paragraph 8-3c. (4) Install impeller (10) on impeller shaft and
tighten securely.
d. Cleaning. See paragraph 5-8.
(5) Install new gasket (11) over studs (8) on
e. Inspection and Repair. Refer to figure 8-4 for wear volute (7). Carefully install the seal plate and
limits on impeller wear ring. Refer to paragraph 8-3e for intermediate housing assembly over studs (8) on volute,
inspection and repair of remainder of parts. and fasten with twelve nuts (17) and lockwashers (16).

(6) Rotate the pump by hand to make sure the

f. Assembly (Fig. 8-5). impeller is not binding or scraping. Shims (12) can be
added behind the impeller to center the impeller in the
(1) Assemble seals, bearings, spacer, and volute. The clearance between the front of the impeller
impeller shaft in intermediate housing (para 8-3f). and the seal plate should be equal to the clearance
between the back of the impeller and the pump casing
(2) Install mechanical seal and seal plate using (fig. 8-4).
instructions in paragraph 8-3f, step 7. Fasten seal plate (15,
fig. 5-5) to intermediate housing with eight capscrews (28) g. Installation. Install pump and pump coupling
and lockwashers (27). (para 5-22).

Section Ill. HOSE REELS

8-5. Hose Reels 2-inch (Fig. 8-6) (e) Remove the six screws (25) and
lockwashers (26). Remove the ring gear (27) and six
a. Removal. Remove hose reel (para 5-23). spacers (28).

(f) Remove six capscrews (29) securing the

b. Disassembly (Fig. 8-6). bevel gear (30) to the disc (22). Remove the bevel gear.

(1) Drum Disassembly. (g) Remove capscrew (31), lockwasher (32),

and nut (33) securing the adapter elbow (34) to the axle
(a) Remove two capscrews (1), lockwashers shaft (35). Remove the adapter elbow (34). Remove four
(2), and flat washers (3) securing the pinion bearing capscrews (36) and lockwashers (37), and remove the
assembly (hose reel lock) (5) to the front frame (6). outlet elbow (38) and O-ring (39). Discard the O-ring.
Remove the pinion bearing assembly (5), spacer (4), and Remove four capscrews (40) and lockwashers (41), and
guard (75). remove outlet adapter (42) and O-ring (43), Discard the
O-ring.
(b) Attach a suitable hoist to drum (48), and (h) Remove drum (48).
remove two capscrews (7), flat washers (8), lockwashers
(9), and nuts (10). Then remove two capscrews (11), flat (i) Loosen set screw (44), and pull axle shaft
washers (12), lockwashers (13), and nuts (14). Lift drum (35) and bearing and collar (45) from the disc (46) and
assembly from front and rear frame (6 and 15), and place collar (47). Put axle shaft in a bench vise and loosen set
on a suitable workbench. Be sure to keep the two spacers screw on bearing collar. Use a punch to rotate collar
(16 and 17) with the drum assembly. clockwise to release bearing and collar from axle shaft.

(c) Remove six capscrews (18) and NOTE

lockwashers (19) securing the swivel joint (20) to the
adapter elbow (34). Remove the swivel joint (20) and Take note of how many thrust washers, If any,
O-ring (21). Discard the O-ring. are used between spacers and disc.

(d) Remove six nuts (76), lockwashers (77), (j) Remove six nuts (78), lockwashers (77),
and studs (23) securing the disc (22) to the six spacers (24). studs (49), and thrust washers (50). Remove six spacers
Remove the disc. (24).

8-7
TM 9-2330-356-14

(k) Remove six capscrews (51), lockwashers (4) Disassembly of Frame.

(52), and nuts (53) securing the collar (47) to the disc (46).
Remove the collar. NOTE
Drum and motor must be removed before
(2) Removal of Motor.
complete disassembly of frame can be
accomplished.
NOTE
(a) Remove four capscrews (68), washers
Hose reel need not be removed from cabinet (69), lockwashers (70), and nuts (71). Remove two tie rods
to remove motor. (72).

(b) Remove eight capscrews (73), lock-

(a) Remove four machine screws (54). washers (70), and nuts (71). Remove two side angles (74).
Remove cover (55). Tag and disconnect electrical leads
from motor (56) at the motor junction box (57), and Legend for figure 8-6:
remove all conduit connections (para 4-27). Disconnect
1. Capscrew (2) 40. Capscrew (4)
the motor junction box from bushing (58) and bushing
2. Lockwasher (2) 41. Lockwasher (4)
from motor.
3. Flatwasher (2) 42. Outlet adapter
4. Spacer 43. O-ring
5. Pinion bearing assembly 44. Set screw
WARNING 6. Front frame 45. Bearing and collar
7. Capscrew (2) 46. Disc
DO NOT remove nipple from motor. Nipple is 8. Flatwasher (2) 47. Collar
packed in place with plaster. If nipple Is 9. Lockwasher (2) 48. Drum
removed, motor will no longer be explosion 10. Nut (2) 49. Stud (6)
proof. Failure to follow this warning may 11. Capscrew (2) 50. Thrust washer (as reqd)
result in serious injury or death to personnel. 12. Flatwasher (2) 51. Capscrew (6)
13. Lockwasher (2) 52. Lockwasher (6)
14. Nut (2) 53. Nut (6)
(b) Remove four screws (59), lockwashers 15. Rear frame 54. Machine screw (4)
.(60), and nuts (61) securing motor (56) to mounting 16, Spacer 55. Cover
bracket (62) and to frame (6). Remove motor (56). 17. Spacer 56. Motor
18. Capscrew (6) 57. Motor junction box
(c) Remove two screws (59), lockwashers 19. Lockwasher (6) 58. Bushing
(60), and nuts (61). Remove mounting bracket (62). 20. Swivel joint 59. Screw (6)
21. O-ring 60. Lockwasher (6)
(d) Loosen set screw (63) and remove pinion 22. Disc 61. Nut (6)
gear (64). 23. Stud (6) 62. Mounting bracket
24. Spacer (6) 63. Set screw
25. Screw (6) 64. Pinion gear
(3) Removal of Terminal Board in Motor Junction 26. Lockwasher (6) 65. Terminal board
Box. 27. Ring gear 66. Capacitor (2)
28. Spacer (6) 67. Machine screw (2)
(a) If motor was not previously removed 29. Capscrew (6) 68. Capscrew (4)
under paragraph (2) above, remove the four machine 30. Bevel gear 69. Washer (4)
screws (54) and cover (55). Remove two leads with 31. Capscrew 70. Lockwasher (12)
terminals (11, fig. 8-7) that come from motor at the 32. Lockwasher 71. Nut (12)
terminal board. Tag and disconnect all electrical leads 33. Nut 72. Tie rod (2)
from the terminal board (65) (para 4-27). Remove the two 34. Adapter elbow 73. Capscrew (8)
capacitors (66). 35. Axle shaft 74, Side angle (2)
36. Capscrew (4) 75. Pinion guard
(b) Remove the two machine screws (67) 37. Lockwasher (4) 76. Nut (6)
securing the terminal board (65) to the junction box and 38. Outlet elbow 77. Lockwasher (6)
remove the terminal board. 39. O-ring 78. Nut (6)

8-8
TM 9-2330-356-14
8-9
TM 9-2330-356-14

c. Cleaning, Inspection, and Repair. (d) Reconnect hose reel wiring in motor
junction box (para 4-27).

WARNING (e) Replace motor junction box cover (55,

fig. 8-6) and secure in place with four machine screws (54).
Dry cleaning solvent P-D-680 Is toxic and
flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F
(38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh
air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and
get medical aid.

(1) Clean metal parts with dry cleaning solvent

(item 11, Appendix E) and dry thoroughly.

(2) Inspect gears for worn, damaged, or missing

teeth. Replace gears if damaged.

d. Assembly (Fig. 8-6).

(1) Assembly of Frame.

(a) Position one side angle (74) onto the two

frames (6 and 15). Secure in place with four capscrews
(73), lockwashers (70), and nuts (71),

(b) Install other side angle (74) onto the two

frames (6 and 15). Secure in place with four capscrews
(73), lockwashers (70), and nuts (71).

(c) Install both tie rods (72) onto the frames Figure 8-7. Terminal Board Installation.
(6 and 15). Secure with four capscrews (68), washers (69),
lockwashers (70), and nuts (71). (3) Installation of Motor (Fig. 8-6).

(2) Installation of Terminal Board in Motor NOTE

Junction Box (Fig. 8-7).
Be sure pinion gear teeth mesh properly with
the ring gear teeth.
(a) Install the two nuts (2, fig. 8-7) on studs
(1) on the terminal board (3). Install the middle capscrew
(4) and one nut (5) onto the terminal board. (a) Install pinion gear (64) on motor shaft.
Tighten set screw (63). - -
(b) Position the terminal in the motor (b) Position motor between mounting
junction box (6). Install screw (7) but do not tighten. Install bracket (62) and frame (6). Install four capscrews (59),
capacitors (8 and 9) onto screw (7). Be sure capacitors are lockwashers (60), and nuts (61).
installed with marking in position shown in figure 8-7.
Tighten screw (7). (c) Install bushing (58) into junction box
(57). Install assembly onto motor.
(c) Install lead with terminal (11) from
motor, along with capacitor lead, to terminal board. (d) Connect the two motor leads to the
Secure with screw (10). Install motor lead with terminal terminal board (65) in the junction box. Connect leads to
(11) and capacitor lead to screw (4). Install second nut (5) terminal board and install conduit (para 4-27). Replace
and tighten. cover (55) and secure with four machine screws (54).

8-10
 TM 9-2330-356-14

(4) Drum Assembly. capscrews (1), lockwashers (2), and flatwashers (3). Ensure
that pinion-on-pinion bearing assembly (5) mates properly
(a) Using six capscrews (51), lockwashers with bevel gear (30).
(52), and nuts (53), fasten the collar (47) to the disc (46).
e. Installation. Install hose reel (para 5-23).
NOTE
8-6. Hose Reel - 1 and 1-inch (Fig. 8-8)
Install original number of thrust washers that
were removed at disassembly. a. Removal. Remove hose reel (para 5-24).

(b) Install six spacers (24) and thrust b. Disassembly (Fig. 8-8).
washers (50) to disc (46). Secure with six nuts (78),
lockwashers (77), and studs (49). (1) Drum Assembly.

(c) Install bearing and collar (45) onto rude (a) Remove two capscrews (1), lockwashers
shaft (35). Rotate collar counterclockwise to lock bearing (2), and flatwashers (3) securing the pinion bearing
and collar on axle shaft. Install axle shaft through collar assembly (hose reel lock) (5) to the frame (6). Remove the
(47) until bearing and collar (45) is against collar (47). pinion bearing assembly (5) and the guard (4).
Tighten set screw (44).
(b) Attach a suitable hoist to drum (26), and
(d) Assemble the outlet elbow (38) by remove the two capscrews (7), flatwashers (8),
installing a new O-ring (43) between the outlet elbow (38) lockwashers (9), and nuts (10). Then remove two
and the outlet adapter (42). Use four capscrews (40) and capscrews (11), flatwashers (12), lockwashers (13), and
lockwashers (41) to secure the outlet elbow (38) and outlet nuts (14). Lift drum assembly from front and rear frame (6
adapter together. Assemble the outlet elbow (38) to the and 15) and place on a suitable work bench. Be sure to
adapter elbow (34) by installing a new O-ring (39) between keep the two spacers (16) with the drum assembly.
the outlet elbow (38) and the adapter elbow (34). Use four
(c) Loosen set screw on bearing collar. Use
capscrews (36) and lockwashers (37) to secure the two
elbows (34 and 38) together. punch to rotate collar clockwise to release bearing and
collar from shaft.
(e) Install the drum (48) over the six spacers
(24). Install the adapter elbow (34) onto axle shaft (35). (d) Remove four nuts (73), lockwashers (74),
Install the capscrew (31), lockwasher (32), and nut (33). and studs (18) from disc (20). Remove six capserews (21),
lockwashers (22), and nuts (23). Remove collar (24).
(f) Position the bevel gear (30) on disc (22)
and secure with six capscrews (29). (e) Remove drum (26).

(g) Position the ring gear (27) and six spacers NOTE
(28) on the disc (22), and secure with six screws (25) and
lockwashers (26). Take note of how many thrust washers (25)
are used between spacers and disc.
(h) Install the disc (22) onto the six spacers
(24) by securing with six studs (23), lockwashers (77), and (f) Remove four nuts (75), lockwashers (76),
nuts (78). studs (27), thrust washers (25), and spacers (28).

(i) Put a new O-ring (21) between the (g) Unscrew adapter elbow (29) from the
adapter elbow (34) and the swivel joint (20), and fasten the swing joint (30).
elbow and swivel joint together with six capscrews (18) and
lockwashers (19). (h) Remove capscrew (31), lockwasher (32),
and nut (33). Remove axle shaft (34). Remove four
(j) Attach a suitable hoist to the drum (48) capscrews (35) and lockwashers (36) securing outlet elbow
and raise drum to position over frame. Install spacers (16 (37) to adapter elbow (29). Remove outlet elbow (37) and
and 17) between bearing and collar (45) and frame (15). O-ring (38). Discard O-ring.
Install two capscrews (7), flat washers (8), lockwashers (9),
and nuts (10). Next, install two capscrews (11), flat washers (i) Loosen set screw (39) and remove swing
(12), lockwashers (13), and nuts (14). joint (30) from the support collar (40).

(k) Position spacer (4) and pinion and (j) Remove six capscrews (41), lockwashers
bearing assembly (5) onto frame (6), and secure with two (43), and nuts (42). Remove support collar (40).

8-11
TM 9-2330-356-14

(k) Remove six screws (44) and lockwashers (4) Disassembly of Frame.
(45) securing the ring gear (46) to the disc (47). Remove six
spacers (48) and ring gear (46). Remove six capscrews (49) NOTE
and shakeproof washers (50), and remove bevel gear (51),
Drum and motor must be removed before
(2) Removal of Motor. complete disassembly of frame can be
accomplished.

NOTE (a) Remove four capscrews (66), washers

(67), lockwashers (68), and nuts (69). Remove two tie rods
Hose reel need not be removed from cabinet (70).
to remove motor.
(b) R e m o v e e i g h t c a p s c r e w s ( 7 1 ) ,
lockwashers (68), and nuts (69). Remove two side angles
(a) Remove four machine screws (52) and (72).
then remove cover (53). Tag and disconnect electrical
leads from motor (54) at the motor junction box (55) and Legend for figure 8-8:
remove all conduit connections (para 4-27). Disconnect
the motor junction box from bushing (56) and bushing 1. Capscrew (2) 39. Set screw
from motor. 2. Lockwasher (2) 40. Support collar
3. Flatwasher (2) 41. Capscrew (6)
4. Pinion guard 42. Nut (6)
5. Pinion bearing assembly 43. Lockwashers (6)
WARNING 6. Front frame 44. Screw (6)
7. Capscrew (2) 45. Lockwasher (6)
Do not remove nipple from motor. Nipple is 8. Flatwasher (2) 46. Ring gear
9. Lockwasher (2) 47. Disc
packed in place with plaster. if nipple is 48. Spacer (6)
10. Nut (2)
removed, motor will no longer be explosion 11. Capscrew (2) 49. Screw (6)
proof. Failure to follow this warning may 12. Flatwasher (2) 50. Shakeproof washers (6)
result in serious injury or death to personnel. 13. Lockwasher (2) 51. Bevel gear
14. Nut (2) 52. Machine screw (4)
15. Rear frame 53. Cover
(b) Remove four screws (57), lockwashers 16. Spacer 54. Motor
(58), and nuts (59) securing motor (54) to mounting 17. Bearing and collar 55. Motor junction box
bracket (60) and to frame (6). Remove motor (54). 18. Stud (4) 56. Bushing
19. Set screw 57, Screw (4)
20. Disc 58. Lockwasher (4)
(c) Loosen set screw (61) and remove pinion 21. Capscrew (6) 59. Nut (4)
gear (62). 22. Lockwasher (6) 60. Mounting bracket
23. Nut (6) 61. Set screw
(3) Removal of Terminal Board in Motor Junction 24. Collar 62. Pinion gear
Box. 25. Thrust washer (as reqd) 63. Terminal board
26. Drum 64. Capacitor (2)
27. Stud (4) 65. Machine screw (2)
(a) If motor was not previously removed 28. Spacer (4) 66. Capscrew (4)
under paragraph (2) above, remove the four machine 29. Adapter elbow 67. Washer (4)
screws (52) and cover (53). Remove two leads with 30. Swing joint 68. Lockwasher (12)
terminals (11, fig. 8-7) that come from motor at the 31. Capscrew 69. Nut (4)
terminal board. Tag and disconnect all electrical leads 32. Lockwasher 70. Tie rod (2)
from the terminal board (63) (para 4-27). Remove the two 33. Nut 71. Capscrew (8)
34. Axle shaft 72. Side angle (2)
capacitors (64). 73. Nut (6)
35. Capscrew (4)
36. Lockwasher (4) 74. Lockwasher (6)
(b) Remove the two machine screws (65) 37. Outlet elbow 75. Nut (6)
securing the terminal board (63) to the junction box and 38. O-ring 76. Lockwasher (6)
remove the terminal board.

8-12
TM 9-2330-356-14
8-13
TM 9-2330-356-14

c. Cleaning, Inspection, and Repair. (d) Reconnect hose reel wiring in motor
junction box (para 4-27).

WARNING (e) Replace motor junction box cover (53,

fig. 8-8) and secure in place with four machine screws (52).
Dry cleaning solvent P-D-680 is toxic and
flammable. Always wear protective goggles (3) Installation of Motor (Fig. 8-8).
and gloves, and use only in a well-ventilated
area. Avoid contact with skin, eyes, and NOTE
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat. Be sure pinion gear teeth mesh properly with
The solvents flash point is 100F-138F the ring gear teeth.
(38C-59C). if you become dizzy while
using cleaning solvent, immediately get fresh (a) Install pinion gear (62) on motor shaft.
air and medical help. If solvent contacts eyes, Tighten set screw (61).
immediately wash your eyes with water and
get medical aid. (b) Position motor between mounting
bracket (60, fig. 8-8) and frame (6). Install four capscrews
(57), lockwashers (58), and nuts (59).
(1) Clean all metal parts with dry cleaning
solvent (item 11, Appendix E) and dry thoroughly. (c) Install bushing (56) into junction box
(55). Install assembly onto motor.
(2) Inspect gears for worn, damaged, or missing
teeth. Replace gears if damaged. (d) Connect the two motor leads to the
terminal board (63) in the junction box. Connect leads to
d. Assembly (Fig. 8-8). terminal board and install conduit (para 4-27). Replace
cover (53) and secure with four machine screws (52).
(1) Assembly of Frame.
(4) Drum Assembly.
(a) Position one side angle (72) onto the two
frames (6 and 15). Secure in place with four capscrews (a) Attach bevel gear (51, fig. 8-8) to disc
(71), lockwashers (68), and nuts (69). (47) with six screws (49) and shakeproof washers (50).
Attach ring gear (46) to disc (47). Use six spacers (48)
(b) Install other side angle (72) onto the two between the ring gear and disc, and secure with six screws
frames (6 and 15). Secure in place with four capscrews (44) and lockwashers (45).
(71), lockwashers (68), and nuts (69).
(b) Position the support collar (40) on disc
(c) Install both tie rods (70) onto the frames (47), and secure with six capscrews (41), lockwashers (43),
(6 and 15). Secure with four capscrews (66), washers (67), and nuts (42).
lockwashers (68), and nuts (69).
(c) Install swing joint (30) through support
collar (40) and tighten set screw (39).
(2) Installation of Terminal Board in Motor
Junction Box.
(d) Install a new O-ring (38) between
adapter elbow (29) and outlet elbow (37). Secure the
(a) Install the two nuts (2, fig. 8-7) on studs outlet elbow to the adapter elbow with four capscrews (35)
(1) on the terminal board (3). Install the middle capscrew and lockwashers (36).
(4) and one nut (5) onto the terminal board.
(e) Screw adapter elbow (29) onto swing
(b) Position the terminal board in the motor joint (30).
junction box (6). Install screw (7), but do not tighten.
Install capacitors (8 and 9) onto screw (7). Be sure (f) Install axle shaft (34) to adapter elbow
capacitors are installed with marking in position shown in (29) with capscrew (31), lockwasher (32), and nut (33).
figure 8-7. Tighten screw (7).
(g) Install four spacers (28) onto disc (47)
(c) Install lead with terminal (11, fig. 8-7) using four studs, lockwashers (76), and nuts (75).
from motor along with capacitor lead to terminal board.
Secure with screw (10). Install motor lead and capacitor (h) Install drum (26) over the four spacers
lead to screw (4). Install second nut (5) and tighten. (28), lockwashers (76), and nuts (75).

8-14
 TM 9-2330-356-14

(i) Install original number of thrust washers (m) Attach a suitable hoist to the drum (26)
(25) over spacer (28). and raise drum into position over frame. install spacer (16)
between bearing and collar (17), and frame (15). Install
(j) Install collar (24) onto disc (20) using six two capscrews (11), flatwashers (12), lockwashers (13), and
capscrews (21), lockwashers (22), and nuts (23). nuts (14). Next, install two capscrews (7), flatwashers (8),
lockwashers (9), and nuts (10).
(k) Install disc (24)) over axle shaft (34), and (n) Position pinion guard (4) and pinion
attach disc to four spacers (28) with four studs (18), bearing assembly (5) onto frame (6), and secure to frame
lockwashers (74), and nuts (73). Tighten set screw (19). with two capscrews (l), lockwashers (2), and flatwashers
(3). Be sure pinion-on-pinion bearing assembly (5) mates
(l) Install bearing and collar (17) onto axle properly with bevel gear (51).
shaft (34). Lock onto shaft by rotating coIIar
counterclockwise. Tighten set screw. e. Installation. Install hose reel (para 5-24).

Section IV. METERS

8-7. Meter (M970 and M970A1) b. Meter Head Seal Replacement.

a. General. The meters on the M969, M969A1,

M970, and M970A1 semitrailers are not to be repaired (1) Cut security wire (fig. 8-9) and remove four
except for replacement of the meter head seal on the capscrews holding register head to meter body. Remove
M970 and M970A1 meter. register.

Figure 8-9. Meter (A1970 and M970A1).

8-15
TM 9-2330-356-14

(2) Remove four flat head screws securing (7) Remove the two screws (9) from the retainer
adapter ring (fig. 8-10) 10 caliration section. Remove plate. Position gasket (4) and retainer plate (5) onto
adapter ring. counter baseplate (1), and attach with two screws (9).

(3) Remove four filister head screws and lift off (8) Install snap ring (8) onto the shaft.
calibration section along with the bottom rubber gasket.
(9) Position the calibration section (fig. 8-10) and
gasket over the counter base plate (1, fig. 8-11). Fasten the
calibration section with four filister head screws.

(10) Attach adapter ring @g. 8-10) to the

calibration section with four flat head screws.

(11) Position register (fig. 8-9) onto adapter plate

and secure with four capscrews. Install new security wire.

Figure 8-10. Meter With Register Removed.

(4) Remove small snap ring (8, fig. 8-11) from

drive shaft. Remove two screws (9) and insert them into
the two tapped holes in the retainer plate (5). The two
screws will lift the retainer plate from the counter base
plate (1), exposing O-ring (3).

(5) Remove O-ring (3) and replace.

(6) If shims (6) and washers (7) were dislodged

from retainer plate (5), install them into the retainer
plate. Figure 8-11. Replacing O-ring in Metez.

Section V. EMERGENCY VALVE VENT AND FLOAT ASSEMBLY

8-8. Emergency Valve Vent (2) Remove manhole cover to aid in removal of
the emergency valve vent (para 4-59).
a. General. The emergency valve vent is attached to
the top of the tank near the manhole cover. It is connected WARNING
to the emergency valve by an actuating rod (fig. 8-12).
Before the vent can be removed or adjusted, the fuel must Ladder has narrow tread. Use care when climbing.
be completely drained from the semitrailer tank and the
interior of the tank must be purged. For draining and NOTE
purging instructions, refer to Section XX, Chapter 4.
When vent is being removed the connector
and tube will separate from the vent. Hold the
b. Removal (Fig. 8-12).
tube while the vent is being removed to keep
it from falling Into tank, then remove the tube.
(1) Make sure emergency valve is closed.

(3) Remove eight capscrews that fasten the vent

to the top of the tank. Remove the vent and gasket.

8-16 Change 1 * U.S. GOVERNMENT PRINTING OFFICE: 1992 643-016/60119

PIN: 045819-000
 TM 9-2330-356-14

Figure 8-12. Emergency Valve Vent Installation.

8-17
TM 9-2330-356-14

(b) Close the emergency valve.

WARNING
(c) Loosen jam nut and turn adjusting nut _
Dry cleaning solvent P-D-680 Is toxic and (fig. 8-12) until tube has 1/8-inch vertical travel.
flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated (d) Tighten jam nut.
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO (e) Open emergency valve and ensure that
NOT use near open flame or excessive heat. emergency valve vent also opens.
The solvents flash point is 100F-136F
(38C-59C). If you become dizzy while 8-9. Float Assembly
using cleaning solvent, immediately get fresh
air and medical help. If solvent contacts eyes,
Immediately wash your eyes with water and WARNING
get medical aid.
Do not climb into tank unless Interior of tank
has been drained and purged and an
c. Cleaning and Inspection. Clean vent assembly with
explosive meter check Indicates it is safe to
dry cleaning solvent (item 11, Appendix E). Inspect O-ring
do so. Adequate forced air ventilation or
under vent cap for physical damage. Inspect for broken or
self-contained breathing apparatus must be
damaged spring. Inspect gasket for physical damage.
used. Person entering tank must have an
Discard if damaged.
attached lifeline. An observer must be
stationed at the manhole opening so that
d. Installation. assistance may be summoned in the event of
an emergency. Failure to follow this warning
(1) Install tube and connector into adapter. Hold may result in serious injury or death to
in place by hand. personnel.

(2) Position gasket on top of vent mounting

a. General.
flange on top of tank. Lower vent into place on top of tank,
aligning the connector with the vent. Hold complete
(1) The float assembly is located inside the
assembly in place and install eight capscrews.
semitrailer tank. It can only be removed by a person from
inside the tank.
e. Adjustment.
(2) Before the float assembly can be removed,
(1) Emergency valve vent must be open the fuel must be drained from the semitrailer tank and the
whenever the emergency valve is opened. interior must be purged. For draining and purging
instructions refer to Section XX, Chapter 4.
(2) If vent does not open, adjust vent as follows:
b. Float Replacement (Fig. 8-13).

WARNING (1) Disconnect the two tubes (1 and 2) from the

elbows (3 and 4). Be sure not to lose the two inserts (5 and
Do not climb into tank unless interior of tank 6).
has been drained and purged and an
explosive meter check indicates It Is safe to (2) Remove capscrew (7), flatwasher (8), and
do so. Adequate forced air ventilation or float valve (9).
self-contained breathing apparatus must be
used. Person entering tank must have an (3) Remove bushing (10), elbow (3), bushing (11),
attached lifeline. An observer must be elbow (4), and bushing (12).
stationed at the manhole opening so that
(4) Replace bushing (10), elbow (3), bushing (11),
assistance may be summoned In the event of
an emergency. Failure to follow this warning elbow (4), and bushing (12) on the float valve (9).
may result In serious injury or death to
(5) Install float valve (9) onto the mounting
personnel.
bracket with capscrew (7) and washer (8).

(a) Adjustment must be done from inside (6) Reconnect the two tubes (1 and 2) to elbows (3
tank. and 4). Be sure inserts (5 and 6) are in place in tubes.

8-18
 TM 9-2330-356-14

Figure 8-13. Float Installation.

c. Replacement of Drain Box. (3) Remove adapter (17) from the drain box.
(1) Remove two capserews (13), flatwashers (14), d. Replacement of Tubing. Remove tubing from
and nuts (15). Remove drain box (16). fittings (para 4-91).
(2) Disconnect tube (18) from adapter (17). Be
sure not to lose insert (19).

8-19
TM 9-2330-356-14

Section VI. VALVES

8-10. Gate Valve (Fig. 8-14)

NOTE
It is not necessary to remove valve to repair.

a. Removal. Remove valve (para 4-85).

b. Disassembly.

(1) Secure valve.

(2) Remove eight capscrews (1), lockwashers (2),

and nuts (3). Lift upper hand wheel assembly from valve
body. Remove gasket (4), and clean mating edges of valve
body and hand wheel assembly.

(3) Loosen packing nut (5) and turn hand wheel

counterclockwise. This will force the spring (6), gland (7),
and packing (8) free of the bonnet (9).

(4) Secure stem (10), and remove nut (11) and

hand wheel (12).

c. Cleaning and Inspection.

WARNING

Dry cleaning solvent P-D-680 Is toxic and

flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F
(38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh
air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and
get medical aid.

(1) Clean metal parts with dry cleaning solvent Figure 8-14. Gate Valve,
(item 11, Appendix E) and dry thoroughly.
(2) Place gasket (4) in position, and install bonnet
(2) Inspect for cracks and pitting. assembly on body. Ensure that disc assembly (13) is at a
right angle to pipe opening. Install eight capscrews (1),
(3) If disc assembly (13) or its mating surfaces in
valve body are pitted or scored, replace entire valve. lockwashers (2), and nuts (3).

d, Assembly. (3) Place hand wheel (12) and nut (11) on stem.
Turn hand wheel clockwise to seat valve.
(1) Place packing (8), gland (7), spring (6), and
packing nut (5) on stem (10). Tighten packing nut two full
turns only. e. Installation. Install gate valve (para 4-85).

8-20
 TM 9-2330-356-14

8-11. Gate Valve, M970 and M970A1 (Fig. 8-15) c. Cleaning and Inspection.

NOTE
WARNING
It is not necessary to remove valve to replace
packings. Dry cleaning solvent P-D-680 is toxic and
flammable. Always wear protective goggles
a. Removal. Remove valve (para 4-85). and gloves, and use only in a well-ventilated
area. Avoid contact with skin, eyes, and
b. Disassembly. clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat.
(1) Secure valve. The solvents flash point is 100F-138F
(38C-59C). If you become dizzy while
(2) Loosen packing nut (1). Turn hand wheel (2) using cleaning solvent, immediately get fresh
counterclockwise to force packing (3) and packing gland air and medical help. If solvent contacts eyes,
(4) free from the valve body (5). Remove nut (6) and hand immediately wash your eyes with water and
wheel (2). get medical aid.

(1) Clean all metal parts with dry cleaning

solvent (item 11, Appendix E).

(2) Inspect for cracks. If valve is removed from

the semitrailer, check sealing surfaces for pitting or
scoring. If any damage is noticed, replace valve.

d. Assembly.

(1) Install new packing (3). Install packing gland

(4) and packing nut (1). Tighten nut two full turns.

(2) Install hand wheel (2) and nut (6). Tighten

nut.

e. Installation. Install valve (para 4-85).

8-12. Gate Valve, M970 and M970A1 (Fig. 8-16)

NOTE
It is not necessary to remove valve to replace
packings.

a. Removal. Remove valve (para 4-85).

b. Disassembly.

(1) Secure valve.

(2) Loosen packing nut (1). Turn hand wheel (2)

counterclockwise to force packing (3) and packing gland
TA502308 (4) free from the bonnet (5). Remove nut (6) and hand
Figure 8-15. Gate Valve. wheel (2).

8-21
TM 9-2330-356-14

(2) Install hand wheel (2) and nut (6). Tighten

nut.

e. Installation. Install valve (para 4-85).

8-13. Butterfly Valve (Fig. 8-17)

a. Removal. Remove valve (para 4-85).

b. Disassembly.

(1) Secure valve.

(2) Remove cotter pin (1) from top pin (2).

Remove top pin and handle (3). Clip (4) may remain in
handle.

(3) Remove two socket head screws (5) and stop

plate (6).

(4) Remove top stem (7), split bearing (8), two

packings (9), and seal (10).

(5) Remove spring pin (11). Remove bottom stem

(12) and O-ring (13).
TA502309 (6) Remove bearing (16) from bottom stem (12).
Figure 8-16. Gate Valve.
(7) Remove disc (14) and sleeve (15).
c. Cleaning and Inspection.
c. Cleaning and Inspection.

WARNING
WARNING
Dry cleaning solvent P-D-680 is toxic and Dry cleaning solvent P-D-680 is toxic and
flammable. Always wear protective goggles flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated and gloves, and use only in a well-ventilated
area. Avoid contact with skin, eyes, and area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat. NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F The solvents flash point is 100F-138F
(38C-59C). If you become dizzy while (38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh using cleaning solvent, immediately get fresh
air and medical help. If solvent contacts eyes, air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and immediately wash your eyes with water and
get medical aid. get medical aid.

(1) Clean all metal parts with dry cleaning (1) Clean all metal parts in dry cleaning solvent
solvent (item 11, Appendix E). (item 11, Appendix E).

(2) Inspect for cracks. If valve is removed from (2) Inspect for cracks, scoring, and pitting.
the semitrailer, check sealing surfaces for pitting or
(3) Replace any damaged part.
scoring. If any damage is noticed, replace valve.
d. Assembly.
d. Assembly.
(1) Install bearing (16) on bottom stem (12).
(1) Install new packing (3). Install packing gland
(4) and packing nut (1). Tighten nut two full turns. (2) Replace sleeve (15) and disc (14).

8-22
 TM 9-2330-356-14

NOTE
Ensure that top stem (7) mates up with disc
(14).

(5) Replace top stem (7), split bearing (8), and

packings (9).

(6) Install seal (10) and stop plate (6) with two
socket head screws (5).

(7) Position handle (3) on top stem (7), alining

holes for installation of top pin (2) and cotter pin (1).
Ensure that clip (4) is in position.

e. Installation. Install valve (para 4-85).

8-14. Check Valve (M967, M967A1, M969, and

M969A1) (Fig. 8-18)

a. Removal. Remove valve (para 4-85).

b. Disassembly.

(1) Secure valve.

(2) Remove retaining ring (l), cap (2), and O-ring

(3).

(3) Remove the two plugs (4) and pin (5) from
body (6).

(4) Lift disc assembly (7) out of valve body.

(5) Secure lever (8) and remove retaining ring

(10), washer (9), disc (11), packing (12), and bushing (13).

c. Cleaning and Inspection.

WARNING

Dry cleaning solvent P-D-680 is toxic and

flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
TA502310
NOT use near open flame or excessive heat.
Figure 8-17. Butterfly Valve. The solvents flash point is 100F-138F
(38C-59C). If you become dizzy while
(3) Replace bottom stem (12) and O-ring (13). using cleaning solvent, immediately get fresh
air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and
NOTE
get medical aid.
Ensure that bottom stem (12) mates up with
disc (14). (1) Clean all metal parts with a dry cleaning
solvent (item 11, Appendix E).

(4) Replace spring pin (11). (2) Inspect for cracks, pitting, and scoring.

8-23
TM 9-2330-356-14

(3) Replace any damaged part. 8-15. Angle Valve (M969, M969A1, M970 and
M970A1) (Fig. 8-19)
d. Assembly.
NOTE
(1) Place packing (12) on disc (11) and assemble It is not necessary to remove valve to repair.
with lever (8). Lock disc in place with washer (9) and
retaining ring (10). a. Removal. Remove valve (para 4-85).

b. Disassembly.
(2) Push bushing (13) into lever and position disc
assembly (7) into valve body (6). Install pin (5) into body, (1) Secure valve.
alining it with disc assembly (7). Install the two plugs (4).
(2) Loosen packing nut (1), and turn hand wheel
(3) Position O-ring (3) on cover(2) and place into (2) counterclockwise to force packing (3) and packing
valve body (6). Secure with retaining ring (1). gland (4) free of bonnet (5).

(3) Remove nut (6) and hand wheel (2).

e. Installation. Install valve (para 4-85):
(4) Remove packing nut (1), spring (13), packing
gland (4), and packing (3).

(5) Unscrew bonnet (5) from body (7).

(6) Unscrew disc nut (8) from the stem (9).

Remove disc seat (10) from disc holder (11).

c. Cleaning and Inspection,

WARNING

Dry cleaning solvent P-D-680 is toxic and

flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F
(38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh
air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and
get medical aid.

(1) Wash all metal parts in dry cleaning solvent

(item 11, Appendix E) and dry thoroughly.

(2) Inspect for cracks and pitting.

d. Assembly.

(1) Install disc ring (12), disc holder (11), disc seat
(10), and disc nut (8) to stem (9). Tighten disc nut.

(2) Place the assembled stem and disc assembly

inside body (7). Install bonnet (5) and tighten.
TA502311 (3) Install packing (3), packing gland (4), spring
Figure 8-18. Check Valve (M967, M967A1, M969, (13), and packing nut (1). Tighten packing nut two full
and M969A1). turns.

8-24
 TM 9-2330-356-14

(4) Replace hand wheel (2) and nut (6) onto stem (2) Remove cover (1), gasket (2), spring (3), and
(9). plunger (4). Remove insert (5).

e. Installation. Install valve (para 4-85).

TA113223
Figure 8-20. Pump Bypass Valve (M970 and M970A1).

c. Cleaning and Inspection.

WARNING

Dry cleaning solvent P-D-680 is toxic and

flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F
(38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh
air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and
get medical aid.

(1) Clean all metal parts in dry cleaning solvent

(item 11, Appendix E).
TA113222
Figure 8-19. Angle Valve (M969, M969A1, M970, (2) Inspect valve for cracks. Check insert (5) and
and M970A1). plunger (4) for scoring and pitting.
8-16. Pump Bypass Valve (M970 and M970A1) (3) Replace any damaged parts.
(Fig. 8-20)
d. Assembly.
a. Removal. Remove valve (para 4-85).
(1) Install insert (5). Install plunger (4), spring
b. Disassembly. (3), gasket (2), and cover (1).

(1) Secure valve. e. Installation. Install valve (para 4-85).

8-25
TM 9-2330-356-14

8-17. Manifold Drain Valve (Fig. 8-21) c. Cleaning and Inspection.

NOTE WARNING
It is not necessary to remove valve to replace Dry cleaning solvent P-D-680 is toxic and
packing. flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated
a. Removal. Remove valve (para 4-90). area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
b. Disassembly. NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F
(1) Secure valve. (38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh
(2) Loosen packing nut (1) and turn hand wheel air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and
(2) counterclockwise to force packing (3) and packing
get medical aid.
gland (4) free of bonnet (5).
(1) Clean all metal parts in dry cleaning solvent
(3) Remove nut (6) and hand wheel (2).
(item 11, Appendix E) and dry thoroughly.
(4) Remove packing nut (1), packing gland (4), (2) Inspect for cracks in valve.
and packing (3).
d. Assembly.
(1) Install packing (3), packing gland (4), and
packing nut (1). Tighten packing nut two full turns.
(2) Assemble hand wheel (2) and nut (6).
e. Installation. Install valve (para 4-90).
8-18. Filter/Separator Automatic Drain Valve
(M969, M969A1, M970, and M970A1)
(Fig. 8-22)
a. Test. A leak from the drain valve is an indication
that either the diaphragm valve or the separator control
valve is leaking. To determine which valve is leaking:
(1) Disconnect the tube fitting at rear of
diaphragm assembly (fig. 8-22).
(2) Dispense fuel through filter/separator and
visually watch for leakage.
(3) If leakage continues, the problem is in the
diaphragm valve and could be:
(a) Dirt under seat.
(b) Damaged O-rings.

(c) Stem hanging up. If the stem is hung up, a

moderate blow with a rawhide mallet to the bottom cap of
the diaphragm valve might free the sticking stem.
(d) Vent plugged. If vent is plugged, clean
hole in vent plug (fig. 8-22) with a .020- to .030-inch
diameter wire.
TA502312 (4) If leaking stops, this is an indication that the
Figure 8-21. Manifold Drain Valve. problem is in the separator control valve.

8-26
 TM 9-2330-356-14

TA113225
Figure 8-22. Filter/SeparatorDrainValve (M969, M969A1, M970, and M970A1).

b. Diaphragm Valve. (b) Unscrew bottom cover (3) from

diaphragm valve. Remove cover (3), O-ring (4), and spring
(1) Removal. (5).

(a) Disconnect the two lines (fig.8-22) from (c) Remove nut (6) from top of diaphragm
the diaphragm valve. (7). Remove two washers (8 and 9), O-ring (10), and
diaphragm (7).
(b) Unscrew the diaphragm valve from the
nipple at the separator valve.
(d) Remove stem (11) with items (13 and 17)
(2) Disassembly (Fig. 8-23). attached, through bottom of valve body.

(a) Remove eight screws (1, fig. 8-23) and (e) Remove nut (13), retainer (14), O-ring
remove cover (2). (15), O-ring (16), and washer (17).

CAUTION (f) Unscrew bearing retainer (18) and

remove O-rings (19 and 20).
Use caution when removing bottom cover
(3). Bottom cover is spring loaded. (g) Remove seat (12) from body (21).

8-27
TM 9-2330-356-14

(3) Cleaning and Inspection. (4) Assembly (Fig. 8-23).

(a) Screw seat (12) into body (21),
WARNING (b) Install O-ring (19) onto bearing retainer
(18). Install O-ring (20) into bearing retainer.
Dry cleaning solvent P-D-680 is toxic and
flammable. Always wear protective goggles (c) Install washer (17), O-ring (16), O-ring
and gloves, and use only in a well-ventilated (15), and retainer (14) onto stem (11). Retain these parts
area. Avoid contact with skin, eyes, and with nut (13).
clothes, and DO NOT breathe vapors. DO (d) Install the assembled stem through
NOT use near open flame or excessive heat. bottom of body (21). Install washer (9), O-ring (10),
The solvents flash point is 100F-138F diaphragm (7), washer (8), and nut (6).
(38C-59C). If you become dizzy while
using cleaning solvent, Immediately get fresh (e) Install spring (5) into body (21). Screw
air and medical help. If solvent contacts eyes, cover (3) with O-ring (4) into body.
immediately wash your eyes with water and
(f) Install cover (2) and secure with eight
get medical aid.
screws (1).
(a) Clean all metal parts in dry cleaning (5) Installation.
solvent (item 11, Appendix E) and dry thoroughly. (a) Screw diaphragm valve onto nipple at
the separator valve.
(b) Inspect all parts for damage. If parts
other than O-rings and the diaphragm need replacement, (b) Connect the two lines to the diaphragm
replace entire valve. valve.

TA113226
Figure 8-23. Diaphragm Valve.

8-28
 TM 9-2330-356-14

c. Separator Valive (Fig. 8-24). (d) Disconnect tubes (fig. 8-22) from body
(10).
NOTE
(e) Remove four screws (11). Remove body
It Is not necessary to remove valve to (10) and O-ring (12). Remove O-ring (13).
disassemble.
(3) Cleaning and Inspection.
(1) Removal. Remove valve from filter/separator
(para 4-83). WARNING
(2) Disassembly. Dry cleaning solvent P-D-680 is toxic and
flammable. Always wear protective goggles
(a) Remove cover (1) from the body (10). and gloves, and use only in a well-ventilated
Remove O-ring (2). area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
NOTE NOT use near open flame or excessive heat.
Spring (3), retainer (5), and disc (6) are loose The solvents flash point is 100F-138F
items. Ensure that they do not become lost. (38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh
(b) Remove spring (3), retainer (5), and disc air and medical help. If solvent contacts eyes,
(6). Bearing (4) is pressed into cover (1). immediately wash your eyes with water and
get medical aid.
(c) Unscrew seat (7) from body (10).
Remove O-ring (9). Bearing seat (8) is pressed into seat (a) Clean all metal parts in dry cleaning
(7). solvent (item 11, Appendix E) and dry thoroughly.

TA113227
Figure 8-24. Separator Valve.

8-29
TM 9-2330-356-14

(b) Inspect all parts for damage. If parts NOT use near open flame or excessive heat.
other than O-rings and the disc (6) need replacement, The solvents flash point is 100F-138F
replace entire valve. (38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh
(4) Assembly. air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and
(a) Install O-ring (13) onto stem (15), then get medical aid.
install O-ring (12) into groove on body (10). Install O-ring
and body onto the valve body (16). Secure with four screws
(11). (1) Clean all metal parts with dry cleaning
solvent (item 11, Appendix E).
(b) Install O-ring (9) into seat (7) and screw
seat (7) into body (10). (2) Inspect for cracks in valve body and bonnet.

(c) Install disc (6), retainer (5), and spring (3) Inspect valve seat in body for pitting and
(3) into body (10). scoring.

(d) Install O-ring (2) onto cover (1) and

screw cover into the body.

(e) Connect the tubes (fig. 8-22) to the body

(10).

(f) Install O-ring (14) into groove on valve

body (16).

(5) Installation. Install valve to filter/separator

(para 4-83).

8-19. Filter/Separator Manual Drain Valve (M969,

M969A1, M970, and M970A1) (Fig. 8-25)

a. Removal. Remove valve (para 4-83).

b. Disassembly.

(1) Secure valve.

(2) Loosen packing nut (1). Turn hand wheel (2)

counterclockwise to force packing gland (3) and packing
(4) free from bonnet (5).

(3) Remove nut (6) and hand wheel (2).

(4) Remove nut (7) to free bonnet (5) from valve

body (8).

(5) Remove nut (9). Pry washer (10) free from

stem (11).

c. Cleaning and Inspection.

TA113228
Figure 8-25. Manual Drain Valve.
WARNING
d. Assembly.
Dry cleaning solvent P-D-680 is toxic and
flammable. Always wear protective goggles (1) Install washer (10) and nut (9).
and gloves, and use only in a well-ventilated
area. Avoid contact with skin, eyes, and (2) Fit bonnet (5) into valve body (8), and install
clothes, and DO NOT breathe vapors. DO nut (7).

8-30
 TM 9-2330-356-14

(3) Install packing (4), packing gland (3), and (2) Inspect all parts for damage and replace any
packing nut (1). damaged part.

(4) Install hand wheel (2) and nut (6).

e. Installation. Install valve (para 4-83).

8-20. Emergency Valve (Fig. 8-26)

a. Removal. Remove emergency valve from bottom

of tank sump (para 4-85).

b. Disassembly.

(1) Remove lever (1) from stem (7) by loosening

nut (3) and screw (2), and pulling lever from shaft.

(2) Unscrew stuffing box nut (4), and remove

O-ring (5) and two packing glands (6) from stuffing box nut
(4).

(3) Pull stem (7) from body (8). Cam (9) will fall
into body. Remove cam.

(4) Loosen set screw (10) and remove adapter

(11).

(5) Loosen three set screws (12) and remove

bonnet (13).

(6) Remove spring (14), then pull stem (15),

along with assembled disc assembly, out through top of
valve. TA502313
Figure 8-26. Emergency Valve.
(7) Remove nut (16), washer (17), retaining plate
(18), plunger disc (19), and disc holder (20) from stem (15). d. Assembly.

c. Cleaning and Inspection. (1) Position cam (9) inside the body (8), and
install stem (7) into body.

(2) Install O-ring (5) and two packing glands (6)

WARNING
into stuffing box nut (4). Install stuffing box nut by sliding
over stem (7), and screw into body.
Dry cleaning solvent P-D-680 is toxic and
flammable. Always wear protective goggles (3) Install lever (1) onto stem (7), and tighten
and gloves, and use only in a well-ventilated screw (2) and nut (3).
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO (4) Install disc holder (20), plunger disc (19),
NOT use near open flame or excessive heat. retaining plate (18), and washer (17) onto stem (15). Install
The solvents flash point is 100F-138F and tighten nut (16).
(38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh (5) Install assembled stem and disc into top of
air and medical help. If solvent contacts eyes, body. Install spring (14).
immediately wash your eyes with water and
get medical aid. (6) Install bonnet (13) and secure in place by
tightening three set screws (12).

(1) Clean all metal parts with dry cleaning (7) Install adapter (11), and tighten set screw (10)
solvent (item 11, Appendix E) and dry thoroughly. to secure adapter to stem (15).

8-31
TM 9-2330-356-14

e. Installation. Install emergency valve to tank sump (4) Drive out roll pin securing the lever to the
(para 4-85). handle guard and remove lever.

8-21. Deadman Control Valve (M970 and b. Assembly and Installation.

M970A1) (Fig. 8-27)
(1) Aline holes in lever (fig. 8-27) and handle
a. Removal and Disassembly. guard. Drive in roll pin to secure lever.

(2) Thread red hose through opening in handle

(1) Pull hose reel hoses out far enough to remove guard (fig. 5-27), and attach to OUT port of valve
deadman control. assembly. Attach green hose to IN port of valve assembly.
(2) Remove two screws and nuts (fig. 8-27) on the (3) Replace valve assembly in handle guard of
deadman control to free the valve assembly. deadman control. Secure with two screws and nuts.

(3) Disconnect the two hoses from the valve (4) Pull hoses to release latch on hose reel and
assembly and remove valve. rewind the hoses.

TA113230
Figure 8-27. Deadman Control.

8-32
 TM 9-2330-356-14

Section VII. NOZZLES AND COUPLINGS

8-22. Vehicle Nozzle (M969 and M969A1)

a. Removal. Remove nozzle (para 4-96).

b. Disassembly (Fig. 8-28).

(1) Place nozzle assembly on a clean work area.

(2) Unscrew ground wire from nozzle handle.

(3) Disconnect the chain for the cap from the

nozzle.

(4) Unscrew the spout from nozzle handle and

remove the strainer.

c. Cleaning and Inspection.

WARNING

Dry cleaning solvent P-D-680 is toxic and

flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F
(38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh
air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and
get medical aid.
TA223050
Figure 8-28. Vehicle Nozzle (M969 and M969A1).
(1) Clean the strainer, spout, and nozzle handle
with dry cleaning solvent (item 11, Appendix E) and dry 8-23. Overwing Nozzle (M970 and M970A1)
thoroughly.
a. Removal. Remove overwing nozzle (para 3-15).
(2) Check spout, screen, rubber cap and chain,
and ground wire and connector for damage. Disassembly (Fig. 8-29).
b.
(3) Replace any damaged part.
(1) Place nozzle assembly on a clean work area.
d. Assembly (Fig. 8-28).
(2) Unscrew ground wire from nozzle handle.
(1) Insert strainer into spout and screw spout
onto handle. (3) Disconnect the chain for the cap from the
nozzle.
(2) Reconnect cap and chain to the nozzle.
(4) Unscrew the spout from nozzle handle and
(3) Screw ground wire into nozzle handle. remove the strainer.

e. Installation. Install vehicle nozzle to hose (5) Loosen thumb screw and slide protector ring
(para 4-96). off end of spout.

8-33
 TM 9-2330-356-14

c. Cleaning and Inspection. (2) Check spout, screen, protector ring, rubber
cap and chain, and ground wire and connector for damage.

WARNING (3) Replace any damaged part.

d. Assembly (Fig. 8-29).

Dry cleaning solvent P-D-680 is toxic and
flammable. Always wear protective goggles
(1) Attach the protector ring onto the spout.
and gloves, and use only in a well-ventilated
area. Avoid contact with skin, eyes, and (2) Insert strainer into spout and screw spout
clothes, and DO NOT breathe vapors. DO onto handle.
NOT use near open flame or excessive heat.
The solvents flash point is 100F-138F (3) Reconneet cap and chain to the nozzle.
(38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh (4) Screw ground wire into nozzle handle.
air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and e. Installation. Install overwing nozzle (para 3-15).
get medical aid.
8-24. Underwing Nozzle (M970 and M970A1)
(1) Clean the strainer, spout, and nozzle handle
a. Removal. Remove underwing nozzle (para 3-17).
with dry cleaning solvent (item 11, Appendix E) and dry
thoroughly. b. Disassembly (Fig. 8-30).

(1) Remove adapter (1) from body (2) by grasping

knurled portion of adapter and turning counterclockwise.

(2) Remove screen (3) from body (2).

(3) Remove six socket head capscrews (4) and six

washers (5) securing body (2) to regulator (6). Remove
body (2).

(4) Remove O-ring (33) from body (2).

(5) Remove six socket head capscrews (7) and six

washers (8) securing regulator (6) to nozzle body (9).
Remove regulator (6).

(6) Remove O-ring from regulator (6).

(7) Remove two capscrews (10), four washers

(11), and two lock nuts (12) securing two handles (13) to
nozzle collar (29). Remove handles (13).

(8) Remove cover assembly (14) by disconnecting

cable latch at the nozzle body.

(9) Remove socket head capscrew (15) and

lockwasher (32) securing crank handle (16) to crank (17).
Remove crank handle (16).

(10) Remove fiber washer (18) from crank (17).

(11) Remove safety wire (19) attached between

bushing (20) and nozzle body (9).

(12) Loosen bushing (20) and slide off crank.

TA221939
Figure 8-29. Overwing Nozzle (M970 and M970A1). (13) Remove spacer (21) from inside bushing (20).

8-34
 TM 9-2330-356-14

TA113231

Figure 8-30. Underwing Nozzle (M970 and M970A1).

8-35
TM 9-2330-356-14

(14) Remove O-ring (22) from inside bushing (20), (11) Insert spacer (21) into bushing, over O-ring
taking care not to disturb the two flatwashers (23) and two (22).
wave washers (24) located directly behind O-ring.
(12) Install fiber washer (18) over crank (17). Turn
(15) Remove external O-ring gasket (25) from crank counterclockwise with a wrench to fully close the
beneath the head of the bushing. valve.

(16) Remove hairpin (26) from end of crank (17) (13) Install crank handle (16) over crank. Aline
and remove crank. groove in crank with screw hole in crank handle. Install
socket head capscrew (15) and lockwasher (32).
(17) Remove bumper (27) by prying off nozzle
assembly with screwdrivers. It may be necessary to apply (14) Install cover assembly (14) by securing cable
heat to the bumper using heat lamps for a period sufficient latch to nozzle body.
to soften the bumper. This usually takes from one to two
hours. (15) Install two handles (13) to collar with two
capscrews (10), four washers (11), and two lock nuts (12).
(18) Remove bearing (28) by applying force to one
end of bearing, visible through opening of collar (29), with (16) Install O-ring to regulator (6) outlet,
a straight punch until opposite end of bearing protrudes indicated with arrow pointing in the direction of flow.
through collar. Grasp this end with pliers and remove
bearing. (17) Install regulator (6) to nozzle body(9) with six
socket head capscrews (7) and six washers (8), observing
(19) Remove collar (29). direction of flow.

(20) Push shaft assembly (30) to move valve as far (18) Install O-ring to adapter body (2).
out of nozzle body as possible.
(19) Install body (2) to regulator(6) with six socket
(21) Remove packing (31) from inside nozzle now head capscrews (4) and six washers (5)
visible with valve fully open.
(20) Insert screen (3) into body (2).
c. Assembly (Fig. 8-30).
(21) Screw adapter (1) into body (2).
(1) With valve in the full open position, install
d. Installation. Install underwing nozzle (para 3-17).
packing (31) into nozzle body (9).
8-25. Closed Circuit Nozzle (M970 and M970A1)
(2) Install collar (29) onto nozzle, alining the
groove in the collar with the boss on the nozzle body. Refer to TM 5-4930-226-12&P manual for disassembly,
inspection, and repair of closed-circuit nozzle.
(3) Install bearing (28) by pushing bearing
through opening in collar into groove in nozzle body. 8-26. Hose Coupling, 2-inch
(4) Install bumper (27). It may be necessary to a. Removal. Remove nozzle and coupling
heat bumper with heat lamps before installation. (para 3-17).
(5) Insert crank (17) through shaft assembly (30), b. Disassembly (Fig. 8-31).
positioning shaft at 12:00 oclock when crank is at 3:00
oclock. (1) Set sleeves (1 and 2) in disconnected position.

(6) Install hairpin (26) into crank (17). (2) Remove ring (3).

(7) Install O-ring gasket (25) over bushing (20). (3) Remove sleeve assembly (2).

(8) Install bushing (20) into nozzle body (9). (4) Remove bumper (4) from sleeve assembly (2).

(9) Install safety wire (19) between bushing and (5) Remove spring (5).
nozzle body.
(6) Remove three retainers (6).
(10) Insert O-ring (22) into bushing, over washers
(23). (7) Remove lock sleeve (1).

8-36
 TM 9-2330-356-14

TA157205
Figure 8-31. 2-inch Hose Coupling.
(8) Remove eight balls (8) from lock sleeve (1). (2) Install valve assemblies (14) into body. Using
needle nose pliers, move springs (13) into position from
(9) Remove ring (9) securing sleeve (10) to body outside of valve. Aline holes and install two pins (12).
(7).
(3) Install two packings (11) to body.
(10) Slide sleeve (10) off body (7).
(4) Slide sleeve (10) onto body and secure with
(11) Remove two packings (11) from body. ring (9).

(12) Remove two pins (12) securing two springs (5) Install eight balls (8) into lock sleeve (10) and
(13) to two valve assemblies (14). then install lock sleeve (10) onto body.

(13) Remove two springs (13) and valve assemblies (6) Install three retainers (6) into body (7).
(14).
(7) Install spring (5).
(14) Remove bumper (15) and packing (16) from
body (7). (8) Install bumper (4) on sleeve assembly (2) and
then install sleeve on body.
c. Assembly (Fig. 8-31).
(9) Install ring (3).
(1) Install packing (16) and bumper (15) on body
(7). d. Installation. Install coupling (para 3-17).

8-37/(8-38 Blank)
 TM 9-2330-356-14

APPENDIX A
REFERENCES

A-1. Scope
This appendix lists forms, field manuals, technical manuals, and other publications referenced in this manual and which
apply to the operation, organizational maintenance, and direct and general support maintenance of the semitrailers.
A-1. Department of the Army Pamphlets
Consolidated Index of Army Publications and Blank Forms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DA Pam 25-30
Index and Description of Army Training Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DA Pam 310-12
Using Unit Supply System (Manual Procedures) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DA Pam 710-2-1
The Army Maintenance Management System (TAMMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DA Pam 738-750
A-3. Forms
Recommended Changes to Publications and Blank Forms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DA Form 2028
Recommended Changes to Equipment Technical Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DA Form 2028-2
Organizational Control Record for Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DA Form 2401
Equipment Inspection and Maintenance Worksheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. DA Form 2404
Maintenance Request . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. DA Form 2407
Preventive Maintenance Schedule and Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D . D Form 314
Processing and Reprocessing Record for Shipment, Storage,
and Issue of Vehicles and Spare Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DD Form 1397
Report of Discrepancy (ROD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SF 364
Product Quality Deficiency Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SF 368
A-4. Field Manuals
NBC Contamination Avoidance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 3-3
NBC Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 3-4
NBC Decontamination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 3-5
Field Behavior of NBC Agents (Including Smoke and Incendiaries) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 3-6
Camouflage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .FM 5-20
Route Reconnaissance and Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 5-36
Ammunition Handbook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 9-13
Operation and Maintenance of Ordnance Material in Cold Weather
(0 0to -650F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 9-207
Organizational Maintenance of Military Petroleum Pipelines,
Tanks and Related Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 10-20
Aircraft Refueling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 10-68
Petroleum Supply Point Equipment and Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 10-69
Petroleum Tank Vehicle Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 10-71
Vehicle Recovery Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 20-22
First Aid for Soldiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 21-11
Manual for the Wheeled Vehicle Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 21-305
Training in Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 25-3
Basic Cold Weather Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 31-70
Northern Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 31-71
Army Motor Transport Units and Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 55-30
Desert Operations (How to Fight) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 90-3
Mountain Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 90-6
Operational Terms and Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 101-5-1

A-1
TM 9-2330-356-14

A-5. Supply Bulletins

Storage Serviceability Standard: Tracked Vehicles,

Wheeled Vehicles, and Component Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SB 740-98-1

A-6. Technical Bulletins

Hand Portable Fire Extinguishers Approved for Army Users . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4200-200-100

Tactical Wheeled Vehicles: Repair of Frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB 9-2300-247-40
Air Pollution Control Procedures for Military Vehicles: Construction
Equipment and Materials Handling Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB 9-2300-402-10
Equipment Improvement Report and Maintenance Digest (US Army Tank-
Automotive Command) Tank and Automotive Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB 43-0001-39 Series
Maintenance Expenditure Limits for Tactical Wheeled Vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB 43-0002-81
Purging, Cleaning and Coating Interior Ferrous and Terne Sheet
Vehicle Fuel Treks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. TB 43-0212
Color, Marking, and Camouflage Painting of Military Vehicles, Construction
Equipment, and Materiels Handling Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB 43-0209
Corrosion Prevention and Control Including Rustproofing Procedures
for Tactical Vehicles and Trailers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. TB 43-0213
Maintenance in the Desert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB 43-0239
Description, Use, Bonding Techniques, and Properties of Adhesives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB ORD 1032

A-7. Technical Manuals

Operator and Organizational Maintenance Manual (Including

Repair Parts and Special Tools List) for Nozzle Assembly,
Closed-Circuit Refueling w/Strainer Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 5-4930-226-12&P
Inspection, Care, and Maintenance of Antifriction Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-214
Operators Manual for Welding Theory and Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-237
Deepwater Fording of Ordnance Materiel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-238
Materials Used for Cleaning, Preserving, Abrading, and Cementing
Ordnance Materiel and Related Items Including Chemicals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-247
Unit, Direct Support, and General Support Maintenance Repair
Parts and Special Tools Lists for Semitrailer, Tank: 5000 Gallon,
M967, M967A1, M969, M969A1, M970, M970A1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-2330-356-24P
Organizational, Direct Support, and General Support Care,
Maintenance, and Repair of Pneumatic Tires and Inner Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-2610-200-24
Operators, Organizational, Direct Support and General Support
Maintenance Manual for Lead-Acid Storage Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-6140-200-14
Painting Instructions for Field Use.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 43-0139
Railway Operating and Safety Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 55-200
Railcar Loading Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 55-601
Storage and Materials Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 743-200-1
Procedures for Destruction of Trek-Automotive Equipment to Prevent Enemy Use . . . . . . . . . . . . . . . . . TM 750-244-6
Direct Support and General Support Quality Control for Inspectors
Inspection Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 750-245-4

A-8. Other Publications

Army Medical Department Expendable/Durable Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CTA 8-100

Expendable/Durable Items (Except Medical, Classy Repair Parts, and Heraldic Items) . . . . . . . . . . . . . . CTA 50-970

A-2
 TM 9-2330-356-14

APPENDIX B
MAINTENANCE ALLOCATION CHART

Section I. INTRODUCTION
B-1. General measuring, and diagnostic equipments used in precision
measurement. Consists of comparisons of two
a. This section provides a general explanation of all instruments, one of which is a certified standard of known
maintenance and repair functions authorized at the accuracy, to detect and adjust any discrepancy in the
various maintenance levels. accuracy of the instrument being compared.

b. The Maintenance Allocation Chart (MAC) in g. Removel/Install. To remove and install the same
Section II designates overall authority and responsibility item when required to perform service or other
for the performance of maintenance functions on the maintenance functions. Install may be the act of
identified end item or component. The application of the emplacing, seating, or fixing into position a spare, repair
maintenance functions to the end item or component will part, or module (component or assembly) in a manner to
be consistent with the capacities and capabilities of the allow the proper functioning of an equipment or system.
designated maintenance levels. h. Replace. To remove an unserviceable item and
install a serviceable counterpart in its place. Replace is
c. Section III lists the tools and test equipment authorized by the MAC and is shown as the third position
(both special tools and common tool sets) required for of the SMR code.
each maintenance function as referenced from Section II.
i. Repair. The application of maintenance services,
d. Section IV contains supplemental instructions including fault location/troubleshooting, removal/ instal-
and explanatory notes for a particular maintenance func- lation, and disassembly/assembly procedures, and mainte-
tion. nance actions to identify troubles and restore
serviceability to an item by correcting specific damage,
B-2. Maintenance Functions fault, malfunction, or failure in a part, subassembly, mod-
ule (component or assembly), end item, or system.
Maintenance functions will be limited to and defined as
j. Overhaul. That maintenance effort (service/ac-
follows:
tion) prescribed to restore an item to a completely servi-
ceable/operational condition as required by maintenance
a. Inspect. To determine the serviceability of an item
standards in appropriate technical publications (i.e.,
by comparing its physical, mechanical, and/or electrical
DMWR). Overhaul is normally the highest degree of
characteristics with established standards through
maintenance performed by the Army. Overhaul does not
examination (e.g., by sight, sound, or feel).
normally return an item to like new condition.
b. Test. To verify serviceability by measuring the me- k. Rebuild. Consists of those services/actions
chanical, pneumatic, hydraulic, or electrical characteris- necessary for the restoration of unserviceable equipment
tics of an item and comparing those characteristics with to a like new condition in accordance with original
prescribed standards. manufacturing standards. Rebuild is the highest degree of
materiel maintenance applied to Army equipment. The
c. Service. Operations required periodically to keep rebuild operation includes the act of returning to zero
an item in proper operating condition, i.e., to clean those age measurements (hours/miles, etc.) considered in
(includes decontaminate, when required), to preserve, to classifying Army equipment/components.
drain, to paint, or to replenish fuel, lubricants, chemical
fluids, or gases. B-3. Explanation of Columns In the MAC,
Section II
d. Adjust. To maintain or regulate, within prescribed a. Column 1, Group Number. Column 1 lists
limits, by bringing into proper or exact position, or by set- functional group code numbers, the purpose of which is to
ting the operating characteristics to specified parameters. identify maintenance significant components, assemblies,
subassemblies, and modules with the next higher
e. Aline. To adjust specified variable elements of an assembly. End item group number shall be 00.
item to bring about optimum or desired performance.
b. Column 2, Component/Assembly. Column 2 con-
f. Calibrate. To determine and cause corrections to tains the names of components, assemblies, subassem-
be made or to be adjusted on instruments or test, blies, and modules for which maintenance is authorized.

B-1
TM 9-2330-356-14

B-3. Explanation of Columns in the MAC, tools) and special tools, TMDE, and support equipment
Section II (Cont) required to perform the designated function.
c. Column 3, Maintenance Function. Column 3 lists f. Column 6, Remarks. This column shall, when
the functions to be performed on the item listed in applicable, contain a letter code, in alphabetic order,
Column 2. (For a detailed explanation of these functions, which shall be keyed to the remarks contained in Section
see paragraph B-2.) IV.
d. Column 4, Maintenance Level. Column 4 specifies, B-4. Explanation of Columns in Tool and Test
by the listing of a work time figure in the appropriate subco- Equipment Requirements, Section III
lumn(s), the level of maintenance authorized to perform
the function listed in Column 3. This figure represents a. Column 1, Tool or Test Equipment Reference Code.
the active time required to perform that maintenance The tool and test equipment reference code correlates
function at the indicated level of maintenance. If the num- with a code used in the MAC, Section II, Column 5.
ber or complexity of the tasks within the listed mainte-
nance function vary at different maintenance levels, b. Column 2, Maintenance Level. The lowest level of
appropriate work time figures will be shown for each level. maintenance authorized to use the tool or test equipment.
The work time figure represents the average time re-
quired to restore an item (assembly, subassembly, compo- c. Column 3, Nomenclature. Name or identification
nent, module, end item, or system) to a serviceable of the tool or test equipment.
condition under typical field operating conditions. This
time includes preparation time (including any necessary d. Column 4, National/NATO Stock Number. The
disassembly/assembly time), troubleshooting/fault loca- National or NATO Stock Number of the tool or test
tion time, and quality assurance/quality control time in ad- equipment.
dition to the time required to perform the specific tasks
identified for the maintenance functions authorized in the e. Column 5, Tool Number. The manufacturers part
Maintenance Allocation Chart. The symbol designations number.
for the various maintenance levels are as follows:
B-5. Explanation of Columns in Remarks,
C .... Operator or Crew Section IV
O .... Unit Maintenance
F .... Direct Support Maintenance a. Column 1, Reference Code. The code recorded in
H .... General Support Maintenance Column 6, Section II.
D .... Depot Maintenance
b. Column 2, Remarks. This column lists information
e. Column 5, Tools and Equipment. Column 5 pertinent to the maintenance function being performed as
specifies, by code, those common tool sets (not individual indicated in the MAC, Section II.

Section II. MAINTENANCE ALLOCATION CHART

(1) (2) (3) (4) (5) (6)

Maintenance Level
Unit DS GS Depot
Group Maintenance Tools and
Number Component/Assembly Function C O F H D Equipment Remarks

06 ELECTRICAL SYSTEM
0607 Instrument or Engine
Control Panel
Wiring, Switches, Test 0.6
Decals, Connectors, Replace 0.5
Conduits, Etc. Repair 1.0
Tachometer, Voltmeter, Test 0.6
Hourmeter Replace 1.0

B-2
 TM 9-2330-356-14

Section II. MAINTENANCE ALLOCATION CHART - Continued

(1) (2) (3) (4) (5) (6)

Maintenance Level
Unit DS GS Depot
Group Maintenance Tools and
Number Component/Assembly Function C O F H D Equipment Remarks

0608 Miscellaneous Items

Box, Triple Marker Rear: Test 0.6
Wiring, Connectors, Repair 1.0
Etc.
0609 Lights
Marker, Composite, Tail, Test 0.6
Stop Replace 1.0
Repair 1.0
0610 Sending Units and Test 0.6
Warning Switches Replace 1.0
0612 Batteries, Storage
Battery, Cover, Box, Service 0.3
Terminals, Cables Test 0.5
Replace 1.0
Repair 1.0
0613 Chassis Wiring
Harness
Chassis Wiring, Test 0.6
Connectors, Vehicle Replace 3.0
Coupling Repair 3.0

11 REAR AXLE
1100 Rear Axle Assembly
Complete Rear Bogie Service 4.0
Attaching Parts: Replace 6.0
Mounting, Gaskets, Repair 4.0
Seals, and Bearings.
Tandem Tubes and
Spring Seats

12 BRAKES
1202 Service Brakes
Service Brake Shoe Test 1.5
Assemblies and Adjust 1.0
Adjusting Parts Replace 4.0
Repair 8.0

B-3
TM 9-2330-356-14

Section II. MAINTENANCE ALLOCATION CHART - Continued

(1) (2) (3) (4) (5) (6)

Maintenance Level
Unit DS GS Depot
Group Maintenance Tools and
Number Component/Assembly Function C O F H D Equipment Remarks

1208 Air Brake System

Coupling, Air Lines and Test 0.6
Fittings, Dummy Replace 0.5
Couplings Repair 0.5
Chamber, Air, Standard Test 0.2
Replace 2.0
Repair 2.0
Chamber, Air, Fail Safe Test 0.2
Replace 2.0
Valve Emergency Relay Test 0.6
Replace 2.0
Reservoir, Air and Service 0.2
Drain Cock Replace 1.0
13 WHEELS 1,2,3,4,8 A,B
1311 Wheel Assembly
Wheel Assembly, Nuts,
Studs, Rings Replace 0.3
Hub and Drum Replace 1.0
Repair 1.0
Bearings Service 0.5
Replace 1.0
Seals and Wipers Service 0.5
Replace 1.0
1313 Tires, Tubes
Tubes Service 1.0
Replace 0.5
Repair 1.0
Tires Replace 0.5
Repair 1.0
15 FRAME, TOWING
ATTACHMENTS 1,2,3,4,5 A,B
1501 Frame Assembly
Frame Bumpers, Repair 2.0
Brackets

B-4
 TM 9-2330-356-14

Section II. MAINTENANCE ALLOCATION CHART - Continued

(1) (2) (3) (4) (5) (6)

Maintenance Level
Unit DS GS Depot
Group Maintenance Tools and
Number Component/Assembly Function C O F H D Equipment Remarks

1501 Frame Assembly (Cont)

Control, Emergency Service 0.5
Valve, Cables Adjust 1.0
Replace 2.0
1503 Pintles and Towing At-
tachments
Bolt-on Kingpin Service 0.3
Replace 0.5
Upper Coupler (Kingpin) Service 0.3
Plate Replace 2.0
1504 Spare Wheel Carrier and
Tire Lock
Carrier, Spare Wheel Service 0.3
Replace 1.0
1507 Landing Gear, Leveling
Jacks
Landing Gear, Crank, Service 0.2
Jack, Pad and Replace 2.0
Brackets Repair 6.0
Board Assembly, Replace 0.5
Landing Gear
16 SPRINGS 1,2,3 A,B
1601 Springs
Springs and Attaching Replace 4.0
Parts
1605 Torque, Radius, and Replace 2.0
Stabilizer Rods Repair 2.0
18 BODY 1,2,3,4 A,B
1801 Body
Brackets, Splash Plates, Replace 0.6
Mudflaps Repair 2.0

B-5
TM 9-2330-356-14

Section II. MAINTENANCE ALLOCATION CHART - Continued

(1) (2) (3) (4) (5) (6)

Maintenance Level
Unit DS GS Depot
Group Maintenance Tools and
Number Component/Assembly Function C O F H D Equipment Remarks

1808 Stowage Racks, Boxes,

Straps, Carrying Cases,
Cable Reels, Hose Re-
els, Etc.
Stowage Racks Service 0.2
Repair 1.0
Cabinets Service 0.2
Repair 1.0
Replace 8.0
Hose Reels Service 0.2
Replace 1.5
Repair 8.0
Tool Box Service 0.1
Replace 0.5
Repair 0.3
Cabinet Doors Service 0.2
Replace 0.6
Repair 1.0
1811 Tank Bodies
Cover Manhole Service 0.2
Replace 0.5
Clamp, Gasket Manhole
Cover Replace 0.5
Drain, Ladder Service 0.2
Tank Service 0.6
Repair 8.0
22 BODY ACCESSORY
ITEMS 1,2,3 A,B
2202 Accessory Items
Accessories, Transfer Replace 1.0
Hoses, Caps, Fuel Repair 2.0
Servicing, Reflectors,
Plugs

B-6
 TM 9-2330-356-14

Section II. MAINTENANCE ALLOCATION CHART - Continued

(1) (2) (3) (4) (5) (6)

Maintenance Level
Unit DS GS Depot
Group Maintenance Tools and
Number Component/Assembly Function C O F H D Equipment Remarks

2210 Data Plates and Instruc-

tion Holders
Plates, Instruction Data Replace 1.0
Decals, Identification
Caution
29 ENGINE ASSEMBLY 1.2,3,4, A,B
5,6,7,9
2910 Engine Assembly
Engine Test 2.0
Service 1.8
Replace 4.0
Repair 6.0
2911 Crankcase, Cylinder
Sleeve, Cylinder Head
and Block
Crankcase, Cylinder Test 2.0
Head and Block Service 2.0
Replace 4.0
Repair 6.5
2912 Crankshaft Replace 8.0
2913 Flywheel Assembly
Flywheel and Ring Gear Replace 3.0
2914 Pistons and Connecting
Rods Replace 5.0
2915 Valves, Camshaft, Adjust 2.0
and Timing System Replace 4.0
Repair 4.0
2916 Engine Lubrication Sys-
tem
Engine Lubrication Test 0.5
System, Oil Filter Repair 2.0
Replace 0.2
2932 Engine Fuel Pump
Engine Fuel Injection Test 1.5
Pump, and Electric Service 0.5
Fuel Pumps Replace 2.0
Repair 2.0

B-7
TM 9-2330-356-14

Section II. MAINTENANCE ALLOCATION CHART - Continued

(1) (2) (3) (4) (5) (6)

Maintenance Level
Unit DS GS Depot
Group Maintenance Tools and
Number Component/Assembly Function C O F H D Equipment Remarks

2933 Engine Air Cleaner Service 0.5

Replace 0.5
2935 Engine Fuel Tank
Engine Fuel Tank, Lines Test 1.0
Service 0.5
Replace 1.0
2937 Engine Fuel Filter
Engine Fuel Filter, Service 0.5
Primary and Replace 0.5
Secondary
2939 Engine Throttle and Adjust 1.0
Choke Controls Service 1.0
Replace 3.0
2941 Engine Muffler Exhaust
and Tall Pipes
Engine Muffler Exhaust Replace 1.0
2952 Engine Cowling Deflec-
tors, Air Ducts, and
Shrouds
Engine Cowling and Replace 1.0
Shroud Repair 1.0
2961 Generator
Engine Alternator Adjust 0.5
Replace 1.0
Repair 1.5
Drive Belt (M967A1
M969A1, M970A1), Replace 1.0
Drive Belt (M967, M969
M970) Replace 1.0
2963 Starter, Solenoids, Cir-
cuit Breakers, Wiring,
and Switches
Starter, Solenoids, Test 0.5
Wiring, Switches, Service 0.1
Control Panel Replace 1.0
Repair 1.0

B-8
 TM 9-2330-356-14

Section II. MAINTENANCE ALLOCATION CHART - Continued

(1) (2) (3) (4) (5) (6)

Maintenance Level
Unit DS GS Depot
Group Maintenance Tools and
Number Component/Assembly Function C O F H D Equipment Remarks

33 SPECIAL PURPOSE
KITS
3307 Special Purpose Kits
Vapor Recovery Piping Service 1.O
Replace 8.0
Repair 4.0

47 GAGES (NONELECTRI-
CAL), WEIGHING AND
MEASURING DEVICES
4702 Gages, Mountings,
Lines, and Fittings
Oil, Fuel, Pump Test 0.1
Replace 0.3
56 FILTERS, SEPARA-
TORS 1,2,3,4,5 A,B
5600 Fuel, Water, Air, Filter/
Separation or Purifier
Assembly
Filter/Separator Service 1.0
Assembly Elements Replace 1.0
and Go-No-Go Fuses Repair 1.0
Filter/Separator Tank Replace 3.0

5601 Automatic Discharge

and Relief Valve
Sump Components, Service 0.5
Valve and Float Replace 2.0
Repair 2.0
72 DISPENSING AND SER-
VICING EQUIPMENT
COMPONENTS 1,2,3,4,5 A,B

7202 Pumps and Meters

Pump, Centrifugal Service 1.0
Replace 3.0
Repair 4.0

B-9
TM 9-2330-356-14

Section II. MAINTENANCE ALLOCATION CHART - Continued

(1) (2) (3) (4) (5) (6)

Maintenance Level
Unit DS GS Depot
Group Maintenance Tools and
Number Component/Assembly Function C O F H D Equipment Remarks
7202 Pumps and Meters
(Cont)
Meter Replace 3.0
7203 Valves, Fittings, Lines
Valves, Fittings, Lines, Service 1.5
Piping and Controls, Replace 3.0
Including Deadman Repair 3.0
7204 Miscellaneous Parts and
Accessories
Nozzles Test 1.0
Service 1.0
Replace 0.5
Repair 4.0

B-10
 TM 9-2330-356-14

Section III. TOOL AND TEST EQUIPMENT REQUIREMENTS

(1) (2) (3) (4) (5)

Tool or lost
Equipment
Reference Maintenance National/NATO Tool
Code Level Nomenclature Stock Number Number

1 O Tool Kit, General, Mechanics 5180-00-177-7033

Automotive
2 O Shop Equipment, Automotive 4910-00-754-0654
Maintenance and Repair,
Organizational Maintenance,
Common No. 1
3 O Shop Equipment, Automotive 4910-00-754-0653
Maintenance and Repair,
Organizational Maintenance,
Common No. 1, Less Power
4 F Shop Equipment, Automotive 4910-00-754-0705
Maintenance and Repair Field
Maintenance
5 H Shop Equipment, Wheeled Field 4910-00-348-7696
Maintenance Post, Camp and
Station
SPECIAL TOOLS:
6 F Driver, Bearing, Front and Rear 5120-00-125-4402 420-0326
Camshaft and Main Drive
7 F Driver, Oil Seal Rear Crankshaft 5120-00-125-4411 420-0250
8 F Gage, Compression Test 4910-00-870-6283 10699180

Section IV. REMARKS

(1) (2)

Reference Code Remarks

A Direct Support (F) maintenance includes replacement of repairable assemblies, repair

of components or assemblies considered uneconomical to evacuate further. Performs
adjustments of systems for which organizational maintenance does not possess skills
or test equipment.
B General Support (H) maintenance includes repair of most replaceable assemblies.
Overhaul of assemblies which require extensive work in terms of man-hours, skills, and
testing of overhauled assemblies will be accomplished at depots.

B-11/(B-12 Blank)
 TM 9-2330-356-14

APPENDIX C
COMPONENTS OF END ITEM AND BASIC ISSUE ITEMS LISTS

Section I. INTRODUCTION

C-1. Scope a. Column (1) Illustration Number (Illus Number).

This column indicates the number of the illustration in
This appendix lists components of the end item and basic which the item is shown.
issue items for the semitrailers to help you inventory items
required for safe and efficient operation. b. Column (2) National Stock Number. Indicates
the National stock number assigned to the item and will be
C-2. General
used for requisitioning purposes.
These components of End Item and Basic Issue Items
Lists are divided into the following sections: c. Column (3) Description. Indicates the National
item name and, if required, a minimum description to
a. Section II. Integral Components of End Item. identify and locate the item. The last line for each item
This listing is for informational purposes only, and is not indicates the FSCM (in parenthesis) followed by the part
authority to requisition replacements. These items are number. If item needed differs for different models of this
part of the end item, but are removed and separately equipment, the model is shown under the Usable On
packaged for transportation or shipment. As part of the Code heading in this column. These codes are identified
end item, these items must be with the end item whenever as:
it is issued or transferred between accounts. Illustrations
are furnished to assist you in identifying the items. Code Used On

b. Section III. Basic Issue Items. These are the C70, C90 Model M967, M967A1
minimum essential items required to place the semitrailer C72, C92 Model M969, M969A1
in operation, to operate it, and to perform emergency C73, C91 Model M970, M970A1
repairs. Although shipped separately, packaged BII must
be with the semitrailer during operation and whenever it is
transferred between property accounts. The illustrations d. Column (4) Unit of Measure (U/M). Indicates
will assist you with hard-to-identify items. This manual is the measure used in performing the actual
your authority to request/requisition replacement BII, operational/maintenance function. This measure is
based on TOE/MTOE authorization of the end item. expressed by a two-character alphabetical abbreviation
(e.g., ea, in, pr).
C-3. Explanation of Columns
e. Column (5)Quantity required (Qty. rqr).
The following provides an explanation of columns found Indicates the quantity of the item authorized to be used
in the tabular listings. with/on the equipment.

C-1
TM 9-2330-356-14

Section II. COMPONENTS OF END ITEM

(1) (2) (3) (4) (5)

Illus National Description Usable on Qty
Number Stock Number FSCM and Part Number Code U/M Rqr
1 1560-00-949-2087 ADAPTER, D-1 C73, C91 EA 1
(96906) MS24484-2
2 2510-00-741-7585 BOARD, GROUND (at landing legs) EA 2
(19207) 7417585
3 2610-00-262-8653 TIRE, SPARE (rear bracket) EA 1
(81349) MIL-T-12459
4 2610-00-051-9450 TUBE, INNER, PNEUMATIC (rear bracket) EA 1
(81348) ZZ-1-550/G2/11.0

C-2
 TM 9-2330-356-14

Section III. BASIC ISSUE ITEMS

(1) (2) (3) (4) (5)

Illus National Description Usable on Qty
Number Stock Number FSCM and Part Number Code U/M Rqr
1 4930-00-333-6573 ADAPTER, OVERWING (tool box) C73, C91 EA 1
(19207) 11668856-1
2 5140-00-772-4142 BAG, TOOL (tool box) C70, C72 EA
(19207) 7724142 C90, C91 , EA 2
C92, C73 EA 3
2 8105-01-283-5710 BAG, TOOL (tool box) C73, C91 EA 2
(19207) 12275300
3 4730-01-065-9388 COUPLING, FUEL SAMPLING (tool box) C72, C92, EA 1
(19207) 11668856 C73, C91

4 4720-01-064-8820 COUPLING, FUEL SAMPLING (tool box) C72, C92, EA 1

(19207) 11668857 C73, C91
5 4730-01468-8675 COUPLING, HALF, QUICK DISCONNECT EA 1
(tool box) (19207) 11668074
6 5330-01-061-5070 GASKET (use with coupling 11668074) EA 1
(19207) 11668581

C-3
TM 9-2330-356-14

(1) (2) (3) (4) (5)

Illus National Description Usable on Qty
Number Stock Number FSCM and Part Number Code U/M Rqr
7 2540-01-080-5597 COVER, FIRE EXTINGUISHER EA 2
(on extinguishers) (19207) 11668081
8 4720-01-072-8355 DUPLEX HOSE, RUBBER C73, C91 EA 2
(19207) 11668581
9 4210-00-808-4544 EXTINGUISHER, FIRE EA 2
(rear and side bracket) (03670) IK10E
10 5210-01-054-9934 GAGE, STICK (stowage tube) EA 1
(19207) 11885988
11 472000-481-3798 HOSE ASSEMBLY 1-1/2 in X 50 ft C73, C91, EA 1
(19207) 11597599
11 4720-00-461-3797 HOSE ASSEMBLY 2-1/2 in X 50 ft C73, C91 EA 1
(19207) 11597598
11 4720-01-058-6032 HOSE ASSEMBLY 1-1/4 in X 50 ft C72, C92 EA 2
(19207) 11685953

C-4
 TM 9-2330-356-14

(1) (2) (3) (4) (5)

Illus National Description Usable on Qty
Number Stock Number FSCM and Part Number Code U/M Rqr
12 4720-01-096-4390 HOSE, TRANSFER (in hose trough) EA 1
(19207) 11685834
13 5330-00-899-4509 GASKET EA 2
(96906) MS27030-9
14 4730-00-643-6166 PLUG, QUICK DISCONNECT EA 2
(96906) MS27029-17
15 472001-067-5676 HOSE, TRANSFER (in hose trough) EA 2
(19207) 11685835
16 4730-00-640-6156 CAP QUICK DISCONNECT EA 2
(96906) MS27028-17
17 5330-00-899-4509 GASKET EA 4
(96906) MS27030-9
18 4730-00-640-6188 PLUG, WICK DISCONNECT EA 2
(96906) MS27029-17

C-5
TM 9-2330-356-14

(1) (2) (3) (4) (5)

Illus National Description Usable on Qty
Number Stock Number FSCM and Part Number Code U/M Rqr
19 4930-01-022-7901 NOZZLE ASSEMBLY (tool box) C72, C92, EA 1
(19207) 12275441-2 C73, C91
20 4730-00-268-7479 BUSHING, PIPE SHOULDER C72, C92, EA 1
(tool box) (96906) MS14315-22 C73, C91
21 5340-01-170-4999 DUST CAP (tool box) C72, C92, EA 1
(19207) 12275443 C73, C91
22 2910-01-170-4937 FILLER NECK PROTECTOR (tool box) C72, C92, EA 1
(use with bushing MS14315-22 only) C73, C91
(19207) 12275446
23 4730-01-170-4973 STRAINER (tool box) C72, C92, EA 1
(19207) 12275444 C73, C91
24 4930-00-204-9452 NOZZLE, CLOSED-CIRCUIT C73, C91 EA 1
(tool box) (97403) 13219E0494
25 4930-01-091-9010 CONNECTOR, ACTUATOR (tool box) C73, C91 EA 1
(use with nozzle 13219E0494 only)
(19207) 12275292
26 4730-01-084-5226 STRAINER (tool box) C73, C91 EA 1
(use with nozzle 13219E0494 only)
(32218) GTP-1534
27 5340-00-912-4086 PADLOCK SET, W/CLEVIS AND CHAIN, EA 1
COMPOSED OF 2 PADLOCKS AND 2 KEYS
(96906) MS21313-160

C-6
 TM 9-2330-356-14

(1) (2) (3) (4) (5)

Illus National Description Usable on Qty
Number Stock Number FSCM and Part Number Code U/M Rqr
28 4730-00-951-3293 REDUCER, QUICK DISCONNECT C70, C90, EA 1
(tool box) (96906) MS49000-1 C72, C92
29 5310-00-812-2414 GASKET REDUCER (tool box) C70, C90, EA 1
(96906) MS27030-6 C72, C92
30 4730-00-951-3295 REDUCER, (QUICK DISCONNECT C70, C90, EA 1
(tool box) (96906) MS49000-5 C72, C92
31 5330-00-899-4509 GASKET, REDUCER (tool box) C70, C90, EA 1
(96906) MS27030-9 C72, C92
32 4730-01484-0560 REDUCER, QUICK DISCONNECT C70, C90, EA 1
(tool box) (96906) MS49000-17 C72, C92
33 5330-00-899-4509 GASKET, REDUCER (tool box) C70, C90, EA 1
(98908) MS27030-9 C72, C92
34 5975-01-050-5707 ROD, GROUND (stowage tuba) EA 1
(97403) 13219E0462
35 4730-01-098-9304 SLEEVE, HOSE (tool box) C73, C91 EA 2
(19207) 12275301

C-7/(C-8 Blank)
 TM 9-2330-356-14

APPENDIX D
ADDITIONAL AUTHORIZATION LIST

Section I. INTRODUCTION
D-1. Scope numbers, descriptions, and quantities are provided to help
you identify and request the additional items you require
a. This appendix lists additional items you are to support this equipment.
authorized for the support of the M967, M967A1, M969,
M969A1, M970, and M970A1 semitrailers. b. If item needed differs for different models of this
b. This list identifies items that do not have to equipment, the model is shown under the Usable on
accompany the semitrailer and that do not have to be Code heading. These codes are identified as follows:
turned in with it. These items are all authorized by CTA,
Code Used On
MTOE, TDA or JTA.
D-2. Explanation of Listing C70, C90 Model M967, M967A1
C72, C92 Model M969, M969A1
a. National stock numbers, FSCM and part C73, C91 Model M970, M970A1

Section II. ADDITIONAL AUTHORIZATION LIST

4930-00-516-0839

2590-00-473-6331

7240-00-222-3088

4930-00-360-0710

5120-00-227-8074

5120-00-230-6385

2590-00-138-8434

4930-00-117-4726

4930-01-068-5100

4730-00-889-2382

4730-01-295-1842

4730-00-936-4584

D-1
TM 9-2330-356-14

Section II. ADDITIONAL AUTHORIZATION LIST - Continued

(1) (2) (3) (4)

National Description Usable on Qty
Stock Number FSCM and Part Number Code U/M Auth
4730-00-929-0787 CAP, 3.00 C72, C92 EA 15
(96906) MS27028-15
4730-00-640-6156 CAP, 4.00 C72, C92 EA 3
(96906) MS27028-17
4730-00-203-1010 COUPLING, 1.5 F to 1-1/2 NPT C72, C92 EA 8
(96906) MS27026-9
4210-00-257-5343 FIRE EXTINGUISHER C72, C92 EA 8
(03670) K20E
5330-00-360-05S5 GASKET, 1.50 C72, C92 EA 8
(96906) MS27030-5
5330-00-088-9166 GASKET 3.00 C72, C92 EA 23
(96906) MS27030-8
5330-00-899-4509 GASKET 4.0 C72, C92 EA 4
(96906) MS27030-9
5975-01-050-5707 GROUND ROD C72, C92 EA 8
(97403) 13219E0462
4720-00-555-8325 HOSE ASSEMBLY, 1.50 I.D. C72, C92 EA 8
(81349) M370B05B2C3000
4720-00-083-0048 HOSE ASSEMBLY 3.00 I.D. C72, C92 EA 8
(73842) 543-419-3-50
4930-00-471-0288 NOZZLE, FUEL C72, C92 EA 8
(19207) 10896274
4730-00-823-5316 PLUG, 1.50 C72, C92 EA 8
(96906) MS27029-9
4730-00-929-0790 PLUG, 3.00 C72, C92 EA 15
(96906) MS27029-15

4730-00-640-6188 PLUG, 4.00 C72, C92 EA 2

(96906) MS27029-17
4730-00-951-3293 REDUCER, 4.0/3.0 F/M C72, C92 EA 1
(24869) MS49000-1
4730-00-951-3296 REDUCER, 4.0/3.0 M/F C72, C92 EA 1
(96906) MS49000-9
4730-01-096-1039 TEE ASSEMBLY QUICK DISCONNECT 3.0 X 1.5 C72, C92 EA 8
(97403) 13222E9884
4730-00-075-2405 TEE ASSEMBLY QUICK DISCONNECT 4.0 C72, C92 EA 1
(97403) 5-14-676C
4820-01-098-4925 VALVE ASSEMBLY 3.00 C72, C92 EA 6
(97403) 13222E9888
5120-00-235-5879 SOCKET, WRENCH C70, C72, C73 EA 1
(93389) 5024

D-2
 TM 9-2330-356-14

APPENDIX E
EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST

Section I. INTRODUCTION

E-1. Scope C - Operator/Crew

O - Unit Maintenance
This appendix lists expendable supplies and materials you F - Direct Support Maintenance
will need to operate and maintain the M967, M967A1, c. Column (3) National Stock Number. This is the
M969, M969A1, M970, and M970A1 tank semitrailers. National stock number assigned to the item; use it to
These items are authorized to you by CTA 50-970, request or requisition the item.
Expendable/Durable Items (Except Medical, Class V
Repair Parts, and Heraldic Items). d. Column (4) Description. Indicates the Federal
item name and, if required, a description to identify the
E-2. Explanation of Columns item. The last line for each item indicates the Federal
Supply Code for Manufacturers (FSCM) in parenthesis,
a. followed by the part number.
Column (1) Item Number. This number is
assigned to the entry in the listing and is referenced in the e. Column (5) Unit of Measure (U/M). Indicates
narrative instructions to identify the material (e.g., Use the measure used in performing the actual maintenance
cleaning compound, (item 5, Appendix E)). function. This measure is expressed by a two-character
alphabetical abbreviation (e.g., pr, ea, in). If the unit of
b. Column (2) Level. This column identifies the measure differs from the unit of issue, requisition the
lowest level of maintenance that requires the listed item. lowest unit of issue that will satisfy your requirements.

Section II. EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST

(1) (2) (3) (4) (5)

Item National
Number Level Stock Number Description U/M
1 C ADHESIVE: General Purpose
(81348) MMM-A-1617
8040-00-262-9025 4 Ounce Tubs oz
2 O ADHESIVE: Sealant
(81349) MIL-A-46106
8040-00-225-4548 12 Ounce Tube oz

3 C CLOTH: Abrasive
(58536) A-A-1048
5350-00-192-5047 50 Sheets -80 Grit EA
5350-00-192-5049 50 Sheets-120 Grit EA
5350-00-192-5051 50 Sheets - 180 Grit EA

4 C CLOTH: Abraeive, Crocus

(81348) P-C-458
5350-00-221-0872 60 Sheets EA

5 O 8030-00-753-4953 COMPOUND: Anti-seize LB

(81349) MIL-A-13881
6 O 8030-01-044-5034 COMPOUND: Anti-seize LB
(81349) MIL-T-5544

E-1
 T

TM g-2330-356-14

Section II. EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST-Continued

(1) (2) (3) (41 (5)

Item Nstlonal
lumber Level Stock Number Descrtptibn U/M
7 C 5610-W-752-5555 COMPOUND: Flighl Dook OT
(81349) ML-D-23003

a F COMPOUND: Lapping and Okding

(5B53B) A-A-1203

5350-00-193-1340 EiOGrlt-1 FbundCan LB

5350-00-193-1341 22OGrtt-1PoundCan
5350-oo-183-1349 4aoGrit-1hlJndCatl i
5359-w-193-1349 509Grit-1PounUCan LB

9 F CORROSION PREVENTIVE: Fkyw@nt Remover

(81349) ML-c-15074

8030-00-664-4917 iouartc6n
8030-00-281-2338 1GdOllCan z
8030-00-252-8300 5Gallorlcan \
NBO-00-252-8301 65 Gallon Drum

CORROBION PREVENTIVE: Grade 3

(81349) ML-C-16173

8030-00-244-1~ lGdlO!lCUl

DRY CLEANING SOLVENT: T!@a II

BQ50-oo-110-4498
@50-00-274-5421 5tsaibIlcatl.
6850-00-295-3011 55 Gallon Druin

DYE: Prussian &IO

(81349) ML-P-30501

6910-00-889-9745 1 ouncenlbe

FUEL OIL. DIESEL: Arc%, OF-A

91~28B-5282
914o-c&28B-5234 55 GalbnDrum

FUEL OIL, DIESEL: Regular, OF-2.

(81343) W-F-800

9140-00-235-5295
9140-00-286-5~

FUEL OIL, DIESEL: Whtw OF-1

(81348) W-F-800 _

9140-00-28B-5287
55GallonDrum

GREASE: Aircraft
(81349) ML-G-23827

E-2
 TM 9-2350-356-14

Section II. EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST- Continued

(1) (2) (3) (4) (61

Item NSUOMI
lumbar tovd StockNumber DOScrlptiOtl U/M
I? c GNEA8E:-Uld~
(81349) MtL-G-IO@24
9150-61-197-7686 2-114 Ounce Tutu 02
915&01-197-7689 6-112 Pound can
9150-01-197-7690 l-314 Pound Can ii
Sl5Ci-W107-7692 3 5 Poundcan
915@01-197-76S3 14 ouw cawdgo ii
18 F WDRAWC FUttD
(8134Q) MIL-H-6063

915040-935-Qm? IGUWtCW GT

19 C Bl-3523 W8RlCATlNG OIL: 02

(81349)MtL-P-48002

20 C. LlJBtCATtNG Ok tnbmd cankwlkn En&u.

blk. OEA (8134@ ha-L-46167

91~4478 louulcal ,I
Bl W-2372 6Gdkulcm E
wspoMo1-71# 88GaonDIwn I GL

2?:. C WBWKtlNGDll:tKMDOlW :~ .,j : :

(81340) MtL-L-2104-.
1
il 07
OIWOO-W-6727 IGuulcm .~
91-1Bb66611 5Gdloncm GL
915o-oo-19%2772 58G6klnDfum : GL

22 C wafucmra ok cmmo3ow
(81349)MtL-L-2104

moukm-8881 IGWtCWl Of
915o-ow88-9858 sGaoncm
mo-oo-1866129 88GatbnDrlun E

23 0 8505-DO-133~8MO PETROlHUM: Whh 02

24 C p&g$yfgg----JnCdbn
- -

7Q2o-o&205-1711 mmJnd8h LB

28 0
~~k~m

Km-Ol-159-4844 a-li2DuncoTuk OZ

28 0 ~~EMG~~PDUND: t&.. &muobto.wt6lTo8on

-

8omo1-054-0740 80 MmbrTl ML

27 0 TAG: Muku
(81349)MIL-T-12755

9##00-537-w 8oE6ch EA

I Change 3 E-3
TM 9-21 -3564 4

. Secti on II. EXPENDABLEKXJ~BLE ~

; SUPPLIES
/ AND MATERIALS LIST- Continued
,*:,, ,:.
0. (S),: ; ,:. . :I (41 (9

Item .NaUMional
umbe
- Level Stock Number .orscriptiQll u/IvII
28 0 TAPE tintbob, IRtnch WldB
(alp) ML-l-2773M

3030-00-689-3535 26oInQhk IN

29 0 YAPE: lltmwal. Ekdrtarl

(8134a) WI-I410
597o-o0-644-3167 85FootRoil , -FT

'."

E-4
 TM 9-2330-356-14

APPENDIX F
TORQUE LIMITS

Table F-1. Standard Torque Specifications.

USAGE MUCH USED MUCH USED USED AT TIMES USED AT TIMES

To 1/2-69,000 To 3/4 120,000 TO 5/8 140,000 150,000
(4850.7000) (8436.0000) (9842.0000) (10545.0000)
CAPSCREW DIAMETER AND
MINIMUM TENSILE STRENGTH To 3/464,000 To 1-115,000 To 3/4 133.000
PSI (KG/SQ CM) (4499.2000) (8084.5000) (9349.9000)
To 1-55,000
(3866.5000)
QUALITY OF MINIMUM MEDIUM BEST
MATERIAL INDETERMINATE COMMERCIAL COMMERCIAL COMMERCIAL
SAE GRADE NUMBER 1 or 2
CAPSCREW HEAD MARKINGS

CAPSCREW BODY SIZE TORQUE TORQUE TORQUE TORQUE

(INCHES) - (THREAD) FT-LB (NM) FT-LB (NM) FT-LB (NM) FT-LB (NM)
1/4-20 5 (7) 8 (11) 10 (14) 12 (16)
-28 6 (8) 10 (14) 14 (19)
5/16-18 11 (15) 17 (23) 19 (26) 24 (33)
-24 13 (18) 19 (26) 27 (37)
3/8-16 18 (24) 31 (42) 34 (46) 44 (60)
-24 20 (27) 35 (47) 49 (66)
7/16-14 28 (36) 49 (66) 55 (75) 70 (95)
-20 30 (41) 55 (75) 78 (106)
1/2-13 39 (53) 75 (102) 85 (115) 105 (142)
-20 41 (56) 65 (115) 120 (163)
9/16-12 (69) 110 (149) 120 (163) 155 (210)
-18 55 (75) 120 (163) 170 (231)
5/8-11 83 (113) 150 (203) 167 (226) 210 (285)
-18 95 (129) 170 (231) 240 (325)
3/4-10 105 (142) 270 (366) 260 (360) 375 (509)
-16 115 (156) 295 (400) 420 (570)
7/8-9 160 (217) (536) 440 (597) (820)
-14 175 (237) 435 (590) 675 (915)
1-8 235 (319) 590 (800) 660 (895) 910 (1234)
-14 250 (339) 660 (695) 990 (1342)
CAUTION: Capscrews threaded into aluminum may require reductions in torque of 30% or more, unless inserts are used.
NOTE: Do not use above values in place of those specified in the engine groups of this manual; special attention should be ob-
served in case of SAE Grade 6, 7, and 8 capscrews,
1. Always use the torque values listed above when specific specifications are not available.
2. The above is based on use of clean and dry threads.
3. Reduce torque by 10% when engine oil is used as a lubricant.
4. Reduce torque by 20% if new plated capscrews are used.

F-1/(F-2 Blank)
 TM 9-2330-356-14

INDEX

Paragraph Page

Adapter, Oil Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-25,7-49,7-68 7-17,7-34,7-40

Adapter, Recirculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-88 4-150
Administrative Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-105,4106, 4170,4-170
4-107,4-109 4171,4-172
Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-109 4-172
Auxiliary Equipment and Basic Issue Items . . . . . . . . . . . . . . . . . . . . . . . . . . 4-106 4-171
Correction of Shortcomings and Deficiencies . . . . . . . . . . . . . . . . . . . . . . . . 4-106 4-171
Exercising . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-107 4-171
Corrective Action . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-107 4-172
scheduled Semites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-107 4-172
Vehicle Major Exercise. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-107 4-172
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-106 4-171
Painting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-106 4-171
Reservation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-106 4-171
Weatherproofing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-106 4-171
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-106 4-171
Maintenance Services and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-106 4-170
Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-107 4-172
Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-109 4-172
Storage Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-106 4-170
Storage Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-106 4-170
Air Chamber, Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-37,4-38, 4-88, 4-89,
6-8,6-9 6-4,6-5
Cleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18,474 3-39,4-124
Cooling shrouding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14,7-60,7-64 7-11,7-35,7-37
Air Shrouding Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-64 7-37
Air Shutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14,7-60,7-64 7-12,7-35,7-37
Blower Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . . 7-14,7-60,7-64 7-127-36,7-37
Bottom Cylinder Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14,7-60 7-12, 7-35
Bracket Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-64 7-37
Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-64 7-37
Rear CylinderHousing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-60 7-35
Shutter Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-64 7-37
Top Housing Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14,7-60 7-11,7-36
Air Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3 7-1
Aircraft Fuel Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 2-39
Aircraft Overwing/Closed-Cirait Fuel Dispensing Operation . . . . . . . . . 2-18 2-42
Aircraft Single Point Underwing Fuel Dispensing Operation . . . . . . . . . . 2-18 2-40
Defueling Operation:
1 1/2-inch Hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 2-45
2 1/2-inch Hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 2-43
2-18 2-39
Fuel Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Index 1
TM 9-2330-356-14

lNDEX-Continued

Paragraph Page

Aircraft Fuel Servicing (Cont):

Recirculation Operation
1 1/2-inch Hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 2-49
2 1/2-inch Hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 2-48
Air Lines, Valves, and Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-48 4-98
Air Line Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-48 4-101
Nylon Tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-48 4-98
Air Reservoirs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7,4-45 3-35,4-96
Air Shutter Test and Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-81 7-62
Thermo Unit, Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-81 7-62
Thermo Power Unit Assembly Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-81 7-62
Alternator, Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-78, 7-79 4-129,7-58
Alternator Drive Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-78 4-131
M967, M969, and M970 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20 6-12
M967A1, M969A1, and M970A1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-78 4-131
Alternator Pulley . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-78 4-131
Test and Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-91 7-73
Angle Valve (M969, M969A1, M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-86, 8-15 4-142,8-24
Aqua-Glo Probe and Adapter (M969 and M969A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-26 5-31
Axle:
M967, M969, and M970 except M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14 5-19
M967A1, M969A1, and M970A1 including M970
SN TC-0843, TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15 5-19

Bar, Buss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-81 4-136

Batteries, Terminals, and Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6,4-23 3-34,4-56
Charging Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23 4-59
Hydrometer Readings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23 4-58
Specific Gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23 4-58
Water Addition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23 4-57
Before Operation Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2-1
Block, Crankcase, Cylinder Head, and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-71 4-121
Board Assembly, Landing Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-55 4-114
Body Parts, Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-57 4-116
Body, Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-59 4-119
Bogie Assembly:
M967, M969, and M970 except M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16 5-20
M967A1, M969A1, and M970A1 including M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17 5-21
Brackets, Splash Plates, and Mudflaps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-56 4-114
Brake Adjusting Parts, Brake Plungers and (M967, M969, M970
except M970 SN TC-0843, TC-0844, and TC-103 thru TC-178) . . . . . . . . . . . . . . . . . . . . . . 4-36 4-85
Brake Air Chamber:
(M967, M969, and M970 except M970 SN TC-0843, TC-0844,
and TC-103 thru TC-178) Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8 6-4
(M967, M969, and M970 except M970 SN TC-0843, TC-0844,
and TC-103 thru TC-178) Fail-Safe Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9 6-5

Index 2 Change 3
 TM 9-2330-356-14

lNDEX-Continued

Paragraph Page

Brake Air Chamber, Test and Replacement, Standard

M967, M969, M970 except M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-37 4-88
M967A1, M969A1, M970A1 including M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-38 4-89
Brake Chamber-Fail-Safe Test and Replacement
M967, M969, M970 except M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-39 4-90
M967A1, M969A1, M970A1 including M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 440 4-92
Brake Camshaft (M967A1, M969A1, M970A1 including M970
SN TC-0843, TC-0844, and TC-103, thru TC-178) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42 4-93
Brake Drums. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7 6-4
Brake Plungers and Brake Adjusting Parts (M967, M969, M970 except
M970 SN TC-0843, TC-0844, and TC-103 thru TC-178) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36 4-85
Adjusting Plunger Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36 4-85
Anchor (Solid) Plunger .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36 4-85
Brake Plunger, Non-adjusting (M967, M969, M970 except M970
SN TC-0843, TC-0844, and TC-103 thru TC-178) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10 6-6
Brake Shoes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6 6-4
Brake System
M967, M969, and M970 except M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28,4-31 4-73,4-74
Actuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31 4-75
Automatic Adjusters . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31 4-75
Brake Air System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31 4-75
Brake Interlock (M970 except M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31 4-77
Emergency Relay Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31 4-75
Fail-Safe Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31 4-75
Service Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31 4-75
M967A1, M969A1, and M970A1 including M970
SN TC-0843, TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29,4-32 4-73,4-77
Actuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32 4-77
Brake Air System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32 4-77
Brake Interlock (M970A1 including M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32 4-80
Emergency Relay Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32 4-78
Fail-Safe Units . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32 4-78
Service Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32 4-78
Slack Adjusters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32 4-80
Brake Wedge Assembly (M967, M969, M970 except M970
SN TC-0843, TC-0844, and TC-103 thru TC-178) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-35 4-84
Breakaway fitting (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13 3-36
Bulk Haul and Fuel Servicing Operations Not Involving Use of
Engine and Pump (All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 2-20
Bottom Loading (Nonfiltered) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 2-23
Gravity Unload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 2-24
Loading With a Hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 2-22
Loading With Rack or Stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 2-20
Top Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 2-20
Water Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 2-24
Bulk Transfer Hose Assembly . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-62 4-120
Bumpers, and Brackets, Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11 6-7

Change 3 Index 3
TM 9-2330-356-14

INDEX-Continued

Paragraph Page

Buss Bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-81 4-136

Buss Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-81 4-136
Butterfly Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-86,8-13 4-143,8-22

C
Cabinet Door (M969, M969A1, M970, M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . 6-16 6-7
Door Sprigs (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16 6-8
Latching Cable (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16 6-7
Trip Bar (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16 6-8
Cabinets and Cabinet Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9 3-35
Hose Reel Cabinet (M969, M969A1, M970, and M970A1) . . . . . . . . . . . . . 3-9 3-35
Piping Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9 3-35
Cabinet, Hose Reel (M969, M969A1, M970, M970A1) . . . . . . . . . . . . . . . . . . . . 5-22,6-15 5-27,6-7
Cabinet, Piping Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13 6-7
Cables, Batteries, Terminal, and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6,4-23 3-34,4-56
Camshaft and Tappets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-34,7-40 7-25,7-30
Centrifugal Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-90,5-19 4-153,5-23
Charging System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7 7-5
Chassis Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12 4-36
Composite Light and Connector Lead Assemblies . . . . . . . . . . . . . . . . . . . 4-12 4-36
Conduit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13 4-41
Connector Lead Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12 4-36
Front Marker Light Lead Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12 4-39
Rear Composite Light Lead Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12 4-36
Receptacle Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12 4-36,4-40
Right Side Marker Light Lead Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12 4-36,4-39
Triple Marker Light Lead Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12 4-36
wiring Harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12 4-36,4-40
Check Valve (M967, M967A1, M969, and M969A1) . . . . . . . . . . . . . . . . . . . . . . 8-14 8-23
Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17 4-50
Cleaner, Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18,4-74 3-39,4-124
Cleaning - General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-62 7-36
Cleaning Tank Interior, Inspecting and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-102 4-169
Closed-Circuit Nozzle (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16,8-25 3-38,8-36
Composite Tail Stop Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15 4-44
Compression Test,Cylinder Head, On Equipment . . . . . . . . . . . . . . . . . . . . . . . 7-89 7-69
Conduit for Chassis Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13 4-41
Connecting Rods, Pistons and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-31,743,7-73 7-21,7-32,7-51
Control Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14 6-7
Control Panel Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26 4-67
Control Panel- Wiring Harness and Conduit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25 4-65
wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25 4-65
Control Panel to Engine Junction Box Conduit . . . . . . . . . . . . . . . . . . . . . 4-25 4-66
Control Panel Wiring Harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25 4-65

Index 4
 TM 9-2330-356-14

lNDEX-Continued

Paragraph Page

Control Tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-92 4-153

Deadman Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-92 4-159
Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-92 4-163
Precheck and Load/Unload Circuit
(M967, M967A1, M969 and M969A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-92 4-153
Float valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-92 4-159
Load/Unload Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-92 4-159
Recheck Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-92 4-154
Precheck Circuit (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-92 4-153
Float Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-92 4-153
Recheck Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-92 4-153
Coupling Semitrailer to Towing Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2-1
Crankcase, Cylinder Head, and Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-71 4-121
Crankshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-77 7-55
Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-77 7-55
Rear Oil Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-77 7-55
Crankshaft and Main Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-36 7-25
Crankshaft and Main Bearing Blocks . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-38 7-26
Cross Tube, Trunnion
M967, M969, and M970 except M970 SN TC-0843,
TC-0844, and TC-103 thru T -178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4 6-2
M967A1, M969A1, and M970A1 including M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5 6-3
Cylinder Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-71,7-72 4-121,7-48
Cylinder Heads Casting and Reeker Arm Studs . . . . . . . . . . . . . . . . . . 7-72 7-48
Valve Guide and Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-72 7-50
Valve Seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-72 7-50
Valve Spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-72 7-51
Cylinder Head and Rocker Arms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-30,7-44 7-20,7-32
Cylinder Head Compression Test, On Equipment . . . . . . . . . . . . . . . . . . . . . . . . 7-89 7-69

DC Volts Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 4-34

Deadman Control Valve (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-21 8-32
Deadman Hose Reel (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-28 5-32
Deadman Release Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-94 4-163
Destruction of Army Materiel to Prevent Enemy USC . . . . . . . . . . . . . . . . . . . . 1-4 1-1
Diagrams Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8 4-29
Differences Between Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 1-1
M967 and M967A1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 1-1
M969 and M969A1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 1-13
M970 and M970A1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 1-13
Recirculation System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 1-13
Underwing Refueling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 1-13
Overwing Refueling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 1-13

Change 3 Index 5
 TM 9-2330-356-14

INDEX-Continued

Paragraph Page

Differences Between Models (Cont)

Upgrades to M967, M969, and M970 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 1-13
M967A1, M969A1, and M970A1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 1-13
M970 (Marine Corps) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 1-13
Dispensing Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-91 4-153
Draining Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-100 4-167
Drums, Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7 6-4

Electrical Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8 4-29

Emergency Relay Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44 4-95
Emergency Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-20 8-31
Control and Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-51 4-110
Control Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18 6-11
Vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8 8-16
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20 5-24
Engine Alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-78 4-129
Drive Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-78 4-131
Drive Belt (M967A1, M969A1, and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . 4-78 4-131
Pulley . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-78 4-131
Engine and Pump Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18 5-21
Engine Controls and Instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 2-7
Control Panel Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 2-8
Engine Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 2-7
Engine Throttle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 2-8
Filter/Separator Gage (M969, M969A1, M970, and M970A1) . . . . . . . . . . 2-9 2-8
Fuel Pressure Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 2-8
Hourmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 2-8
Indicator Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 2-7
Oil Pressure Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 2-8
Reheater Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 2-7
Pump Pressure Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 2-8
Starter Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 2-8
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 2-8
Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 2-8
Engine Fuel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-73 4-122
Bleeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-73 4-124
Draining Fuel Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-73 4-123
Draining Water from Fuel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-73 4-123
Electric Fuel Pumps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-73 4-124
Fuel Lines and Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-73 4-124
Fuel Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-73 4-124

Index 6
 TM 9-2330-356-14

lNDEX-Continued

Paragraph Page

Engine Fuel System (Cont)

Fuel Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-73 4-123
Electric Fuel Pump Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-73 4-123
Primary and Secondary Fuel Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-73 4-124
Testing Electric Fuel Pumps on Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . 4-73 4-122
Engine Junction Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19 4-52
Engine Junction Box and Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-21,7-53 7-16,7-34
Engine Lubrication System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-72 4-122
Engine Muffler/Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-77 4-127
Engine Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 2-9
Engine Preheater Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18 4-52
Engine Throttle Linkage and Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-75 4-125
Engine Servicing, General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-70 4-121
Engine Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16 4-45
Exhaust Manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-22,7-52 7-16,7-34
Extreme Cold Weather Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20 2-53
Extreme Hot Weather Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21 2-53

Fabricated Tools and Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4,5-3 4-2,5-1

Fail-Safe Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2-3
Filtered Fuel Servicing Operations (M969 and M969A1) . . . . . . . . . . . . . . . . . . 2-16 2-33
Filtered Bulk Deliver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 2-33
Filtered Fuel dispensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 2-35
Fuel Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 2-36
Filtered Fuel Servicing Operations (M970 and M970A1) . . . . . . . . . . . . . . . . . . 2-17 2-36
Filtered Bulk Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17 2-38
Filtered Self-Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17 2-36
Filter/Separator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-83 4-139
Automatic Drain Valve (M969, M969A1, M970 and M970A1) . . . . . . . . . . 8-18 8-26
Diaphragm Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-18 8-27
Separator Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-18 8-29
Elements and Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-83 4-139
Manual Drain Valve (M969, M969A1, M970 and M970A1) . . . . . . . . . . . . 8-19 8-30
0peration (M969, M969A1, M970, M970A1) . . . . . . . . . . . . . . . . . . . . . . . . 2-15 2-32
Sump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12 3-36
Fittings, Air Lines, Valves, and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-48 4-98
Fire Extinguisher Mounting Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-68 4-121
Float Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9 8-18
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-103 4-170
Flywheel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-27,7-47 7-18,7-33
Frame, Bumpers, and Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11 6-7

Index 7
 TM 9-2330-356-14

lNDEX-Continued

Paragraph Page

Fuel Handling (All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 2-5

Bonding and Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 2-5
Fire Extinguishers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 2-6
On-vehicle Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 2-6
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 2-5
Spills and Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-8 2-7
Vapor Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 2-7
Fuel Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-73 4-123
Fuel Injection Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... . . . 7-26,7-48, 7-18,7-33,
7-69,7-86 7-41,7-64
On Equipment Adjustment and Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-86 7-64
Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-86 7-64
Timing Method 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-86 7-65
Timing Method 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-86 7-66
Test, After Rebuilding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-86 7-64
Fuel Injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . 7-28,7-46, 7-19,7-32,
7-70 7-45
Fuel Level Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-64 4-120
Fuel Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-19,7-55 7-14,7-34
Fuel Servicing, Aircraft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 2-39
Fuel Stop Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-20,7-54, 7-16,7-34,
7-67,7-85 7-39,7-63
Fuel Stop Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22 4-54
Fuel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-73,7-4 4-123,7-2
Fueling/Defueling Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 2-19
Changing Fuels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 2-20
Operation Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 2-19
Buss, Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-81 4-136

G
Gage, Fuel Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-64 4-120
Gages, and Indicator Light, Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 4-59
Gate Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10 8-20
Valves Band F, All Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10 8-20
Valve P, M970and M970A1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-12 8-21
Valve R, M970 and M970A1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11 8-21
Gear Cover Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-32,7-42,7-75 7-24,7-31,7-54
General Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7,5-8 5-11,5-11
Glow Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21 4-54
Governor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-76 4-127
Governor Sensitivity Adjustment (No Engine Surge) . . . . . . . . . . . . . . . . . . . . . 4-76 4-127
Governor Cup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-33,7-41,7-76 7-24,7-31,7-55
Governor Linkage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . 7-18,7-56,7-66 7-14,7-34,7-39

Index 8
 TM 9-2330-356-14

lNDEX-Continued

Paragraph Page

Governor Speed and Sensitivity Adjustment.. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-84 7-63

Governor System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8 7-5
Grounding Rod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . 4-63 4-120
Grounding Studs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-57 4-116

H
Heaters, Manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20 4-53
High Temperature Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22,7-17, 4-54,7-13,
7-57,7-83 7-34,7-63
Fuel Stop Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22 4-56
High Temperature Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22 4-55
Low Oil Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22 4-56
Hose Coupling, 2 1/2-Inch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-26 8-36
Hose Reel, Deadman (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-28 5-32
Hose Reels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10 3-36
2 1/2-inch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5 8-7
1 1/4-inch and 1 1/2-inch (M969, M969A1, M970 and M970A1) . . . . . . . . 8-6 8-11
Hose Reel Assembly - 1 1/4-Inch and 1 1/2-Inch . . . . . . . . . . . . . . . . . . . . . . . . . 5-24 5-30
Hose Reel Assembly -2 1/2-Inch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-23 5-28
Hose Reel Cabinet (M969, M969A1, M970, M970A1) . . . . . . . . . . . . . . . . . . . . 5-22,6-15 5-27,6-7
Hose Reel Hoses and Fittings.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-89 4-151
1 1/4-inch Hoses (M969 and M969A1)
and 1 1/2-inch Hose (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . 4-89 4-151
2 1/2-inch Hose(M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-89 4-151
Deadman Hose Reel (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . 4-89 4-151
Hose Reel Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27 4-68
Hoses and Fittings, Hose Reel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-89 4-152
Hose Troughs . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8,6-12 3-35,6-7
I
Identification and Instruction Plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11,4-67 1-16,4-121
Identification of Valves, Piping, and Dispensing Components . . . . . . . . . . . . . . 2-11 2-10
Bulk Fuel Servicing Hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-16
Emergency Valve Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-16
Filter/Separator (M969, M969A1, M970, and M970A1) . . . . . . . . . . . . . . . 2-11 2-13
Deadman Release Plunger (M970 and M970A1) . . . . . . . . . . . . . . . . . 2-11 2-13
Hose Reel Cabinet (M969, M969A1, M970, and M970A1) . . . . . . . . . 2-11 2-13
Hose Reels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-14
Meter(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-13
Rewinding Hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-14
Static Reel (M969 and M969A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-16
Valve M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-13
Valve N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-13
Valves P and R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-13
Valve S (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-13
Unwinding Hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-14

Index 9
TM 9-2330-356-14

lNDEX-Continued

Paragraph Page

Identification of Valves, Piping, and Dispensing Components (Cont)

Loading Precheck (All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-17
Load/Unload Selector (M967, M967A1, M969, and M969A1) . . . . . . . . . . 2-11 2-19
Load Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-19
Unload Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-19
Identicationof Valves, Piping, and Dispensing Components:
Nozzles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-16
Piping Control Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-11
Static Reel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-12
Valve A, Emergency Valve Operator (All Models) . . . . . . . . . . . . . . . . 2-11 2-11
Valve B (All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-11
Valve C (M970,M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-11
Valve D, Precheck (All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-11
Valve E (M967, M967A1, M969, M969A1) . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-12
Valve E (M970, M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-12
Valve F (All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-12
Valve G (All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-12
Valve H (All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-12
Valve J (All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-12
Valve K (M969, M969A1, M970, and M970A1) . . . . . . . . . . . . . . . . . . . 2-11 2-12
Indicator Light, Switches, Gages, and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 4-59
Inspecting and Cleaning Tank Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-102 4-169
Inspecting and Servicing the Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-1
Instruction Plates, Identification and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11,4-67 1-16,4-121
Instruments, Engine Controls and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 2-7
Intake Manifold Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-82 4-137
J
Jacking Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 2-5
Junction Box, Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19 4-52
Junction Box and Electrical Wiring, Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-21,7-53 7-16,7-34

K
Kingpin, Upper Coupler Plate... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10 5-14

L
Ladder and Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-61 4-120
Landing Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-54 4-112
Landing Gear Leg Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-54,6-17 4-112,6-9
Landing Gear Shoe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-54 4-112
Light, Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26 4-67
Lights, Marker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14 4-41
Low Oil Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22 4-56
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3-1
Lubrication System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-72,7-5 4-122,7-3

Index 10
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Paragraph Page

M
Main Bearings, Crankshaft and..... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-36 7-27
Maintenance Allocation Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix B B-1
Maintenance Forms and Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2,3-2 1-1,3-21
Manhole and Fill Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-60 4-119
Manifold Drain Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-17 8-26
Manifold Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20 4-53
Marker Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14 4-41
Meter (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7 8-15
Meter Assembly
M969 and M969A1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25 5-30
M970 and M970A1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-27 5-32
Meter Inlet Pressure Gage..... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-95 4-164
Miscellaneous Body Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-57 4-116
Grounding Studs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-57 4-116
Vent Caps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-57 4-116
Motor, Starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-79 4-134
Mounting Bracket, Fire Extinguisher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-68 4-121
Mudflaps, Brackets, Splash Plates, and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-56 4-114
Muffler/Exhaust, Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-77 4-127
Multimeters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9 4-29

N
Non-adjusting Brake Plunger (M967, M969, and M970) . . . . . . . . . . . . . . . . . . . 6-10 6-6
Nonfiltered Fuel Servicing Involving Use of Engine and Pump . . . . . . . . . . . . 2-14 2-27
Bulk Delivery (All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14 2-29
Hose Evacuation (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14 2-31
Nonfiltered Dispensing (M969 and M969A1) . . . . . . . . . . . . . . . . . . . . . . . . 2-14 2-30
Self-Load (M967, M967A1, M969, and M969A1) . . . . . . . . . . . . . . . . . . . . . 2-14 2-27
Nozzle, Adapter, and Sampling Bags (M970 and M970A1) . . . . . . . . . . . . . . . . 4-65 4-120
Nozzle Assembly Test and Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-87 7-68
Nozzle, Closed-Circuit (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16,8-25 3-38,8-36
Nozzle, Overwing (M970 and M970A1).. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15,8-23 3-37,8-33
Nozzle, Underwing (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17,8-24 3-39,8-34
Nozzle, Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22 8-33
Nozzle, Vehicle (M969 and M969A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14,4-97 3-36,4-165

O
Ohms Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10 4-30
Oil Bypass Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-74 7-53
Oil Cooler and Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-15,7-59 7-13,7-35
7-65 7-39
Oil Filler Tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-23,7-51 7-16,7-34
Oil Filter Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-25,7-49,7-68 7-17,7-34,7-40

Index 11
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Paragraph Page

Oil Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-24,7-50 7-17,7-34

Oil pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...... 4-22 4-54
Off Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-35,7-39 7-27,7-30
Operating Towing Vehicle with Semitrailer Coupled . . . . . . . . . . . . . . . . . . . . . 2-5 2-4
Operation on Unusual Terrain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23 2-53
Overwing Nozzle (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-15,8-23 3-37,8-33

P
Painting and Stenciling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7 4-22
Parking Brake Control Valve.... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47 4-97
Piping Control Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13 6-7
Piping, Dispensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-91 4-153
Piping Strainer . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . .. . . . . . . . . . . . . . 4-87 4-150
Piping, Vapor Recover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-98 4-165
Pistons and Connecting Rods... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-31,7-73,7-43 7-21,7-51,7-32
Power Train . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9 7-6
Precheck and/orLoad/Unload Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-93 4-163
Preparation of Equipment for Administrative Storage . . . . . . . . . . . . . . . . . . . . 4-106 4-170
Preparation of Equipment for Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-110 4-172
Pressure Protection Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-46 4-96
Preventive Maintenance Checks and Services (PMCS): . . . . . . . . . . . . . . . . . . . 3-3 3-21
Operator/Crew . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 4-5
Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . 4-5 4-5
Procedures for Common Components and Miscellaneous Items . . . . . . . . . . . 4-108 4-172
Air Lines and Reservoirs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-108 4-172
Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-108 4-172
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-108 4-172
Pump, Centrifugal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-90,5-19 4-153,5-23
Pump, 4-Inch (M967, M967A1, M969,and M969A1) . . . . . . . . . . . . . . . . . . . . . 8-3 8-1
Air Leakage last . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3 8-1
Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .. .. 8-3 8-3
Gaskets and Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8-3 8-3
Impeller and Wear Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3 8-3
Impeller Shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3 8-3
Mechanical Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3 8-3
Pump, Fuel Injection . . . . . . . . . . . . . . . . . . . . . . ... . . . ... . . . . . . . .... 7-26,7-69,7-86 7-18,7-41,7-64
Pump, Fuel Injector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-48 7-33
Pump, 3-Inch (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4 8-5
Air Leakage Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4 8-5
Impeller and Wear Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4 8-5
Intermediate Housing Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4 8-7
Seal Plate and Mechanical Seal.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4 8-5
Pump Bypass Valve (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-16 8-25

Index 12
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Paragraph Page

Pump, Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-35,7-39 7-27,7-30

Purging Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-101 4-167
Chemical Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-101 4-168
Forced Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-101 4-169
Steam Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-101 4-168

Quality Assurance/Quality Control (QA/QC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 1-1

Recalibration, Tachometer . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-82 7-63

Recirculation Adapter . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-88 4-150
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix A A-1
Reflectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-66 4-121
Refuel on the Move (ROM) (M969 and M969A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19 2-51
Releases of Fail-Safe Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2-3
Manual Release (Caging) (M967, M969, and M970 except
M970 SN TC-0843, TC-0844, and TC-103 thru TC-178). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2-3
Manual Release (Caging) (M967A1, M969A1, and M970A1
including M970 SN TC-0843, TC-0844, and TC-103 thru TC-178). . . . . . . . . . . . . . . . . . 2-4 2-4
Reserve Air Release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2-3
Removal of Equipment from Administrative Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-109 4-172
Repair Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3,5-1 4-2,5-1
Reporting of Equipment Improvement Recommendations (EIRs) . . . . . . . . . . . . . . . . 1-5 1-1
Reservoirs, Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7,4-45 3-35,4-96
Rocker Arm Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-29,7-45,7-71 7-20,7-32,7-47
Rocker Arms, Cylinder Head and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-30,7-44 7-20,7-32

Sensor, Tachometer (M967, M969, and M970 except M970

SN TC-0843, TC-0844, and TC-103 thru TC-178). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-16,7-58 7-13,7-35
Service and Emergency Couplings, Air Lines, and Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-43 4-95
Service Brake Shoe Assemblies:
M967, M969, M970 except M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-33 4-80
M967A1, M969A1, and M970A1 including M970
SN TC-0843, TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34 4-82
Shoe, Landing Gear . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-54 4-112
Shoes, Brake . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6 6-4
Shrouding, Air Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14,7-60 7-11,7-35
Slack Adjuster (M967A1, M969A1, M970A1 including
M970 SN TC-0843, TC-0844, and TC-103 thru TC-178) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-41 4-92
Solenoid, Engine Preheater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18 4-52
Solenoid, Fuel Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-20,7-54 7-16,7-34
7-67,7-85 7-39,7-63
Solenoid, Starter . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-80 4-136
Spare Wheel Carrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-53 4-112
Specifications and Tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10 7-7
Tabulated Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10 7-7
Torque Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10 7-7

Change 3 Index 13
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lNDEX-Continued

Paragraph Page

Splash Plates, Brackets, Mudflaps, and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-56 4-114

Spring Seat Bearings (M967, M969, M970 except M970
SN TC-0843, TC-0844, and TC-103 thru TC-178) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30 4-74
Spring Seat Bearings, Wiper, and Seals (M967, M969, and M970 except
M970 SN TC-0843, TC0844, and TC-103 thru TC-178) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3 6-1
Starter Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-78 7-55
Starter Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-79 4-134
Starter Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-80 4-136
Starting System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6 7-4
Starter Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-90 7-70
Static Reel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-96 4-164
Stenciling, Painting and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7 4-22
Strainer, Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-87 4-150
Sump Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-84 4-141
Automatic Drain Valve and Float Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-84 4-141
Manual Drain Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-84 4-141
Sump, Filter/Separator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12 3-36
Suspension (M967A1, M969A1, and M970A1 including M970
SN TC-0843, TC-0844, and TC-103 thru TC-174) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13 5-17
Suspension Springs (M967, M969, and M970 except
M970 SN TC-0843, TC-0844, and TC-103 thru TC-174). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12 5-15
Switch, High Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17,7-57,7-83 7-13,7-34,7-63
Bench Test Armature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-90 7-70
for Grounds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-90 7-71
for Open Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-90 7-71
for Shorted Cods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-90 7-71
Shaft Runout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-90 7-71
Bench Test Brush Springs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-90 7-72
Bench Test Commutator Runout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-90 7-71
Bench Test Field Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-90 7-71
Bench Test Solenoid Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-90 7-72
On Equipment Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-79,7-90 4-134,7-70
Switches, Gages, and Indicator Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 4-59
Preheat Indicator Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 4-65
Preheat Indicator Light Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 4-65
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 4-65
Control Panel Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 4-65
Switches, Instruments and Indicator Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 4-60
Testing Instruments, Switches, and Indicator Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 4-59
Engine Switches (Preheater, Starter, and Engine) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 4-60
Filter/Separator Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 4-62
Fuel Pressure and/or Oil Pressure Gages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 4-62
Tachometer and/or Hourmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 4-61
Voltmeter and/or Pump Pressure Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 4-61

Tabulated Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 1-13

Tachometer Recalibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-82 7-63

Index 14 Change 3
 TM 9-2330-356-14

lNDEX-Continued

Paragraph Page

Tachometer Sensor (M967, M969, and M970) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-16,7-58 7-13,7-35

Tank Body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-59 4-119
Tank, Draining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-100 4-167
Tank Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-19 6-12
Tank, Purging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-101 4-167
Tappets, Camshaft and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-34,7-40 7-25,7-30
Terminals, Cables, Batteries, and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6,4-23 3-34,4-56
Throttle Cable, Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-75 4-126
Throttle Linkage, Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-75 4-125
Tire and Tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-50 4-109
Tool BOX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11,4-58 3-36,4-118
Torque Rods, Upper and Lower (M967, M699, and M970 except
M970 SN TC-0843, TC-0844, and TC-103 thru TC-178) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11 5-14
Troubleshooting
Direct Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4 5-3
General support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4 5-10
Operator/Crew . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 3-28
Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6 4-9
Trunnion Cross Tube
M967, M969, and M970 except M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4 6-2
M967A1, M969A1, and M970A1 including M970
SN TC-0843, TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5 6-3
Tube, Oil Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-23,7-51 7-16,7-34
Tubing, Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-92 4-153

Uncoupling Semitrailer from Towing Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 2-5

Underwing Nozzle (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17,8-24 3-39,8-34
Unusual Terrain, Operation on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23 2-53
Upper Coupler/Kingpin Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-52 4-110
Upper Coupler (Kingpin) Plate Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10 5-14
Using the DC Volts Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 4-34
Measuring DC Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 4-35
Setting Up the Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 4-34
AN/URM-105 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 4-34
Simpson 160 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 4-34
TS 352 B/U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 4-34
Using the Ohms Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10 4-30
Continiutiy Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10 4-31
Testing for Shorts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10 4-32
Testing Resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10 4-33
Zero the Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10 4-30
AN/URM-105 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10 4-30
Simpson 160 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10 4-31
TS 352 B/U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10 4-30

Change 3 Index 15
TM 9-2330-356-14

lNDEX-Continued

Paragraph Page

Valve Rocker Arm Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-88 7-69

Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-48,4-86 4-98,4-142
Angle Valve and Check Valve (M969,
M969A1, M970, and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-86,8-15 4-143,8-24
Butterfly Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-86,8-13 4-143,8-22
Check Valve (M697, M967A1, M969, and M969A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-86,8-14 4-144,8-23
Deadman Control Valve (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-21 8-32
Deadman Release Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-94 4-163
Emergency Relay Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44 4-95
Emergency Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-86,8-20 4-148,8-31
Four-inch Control Valve (Bottom Loading) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-86 4-144
Gate Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-86 4-142
Manifold Drain Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-17 8-26
Oil Bypass Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-74 7-53
Parking Brake Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47 4-97
Precheck and/or Load/Unload Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-93 4-163
Pressure Protection Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-46 4-96
Pump Bypass Valve (M970 and M970A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-86,8-16 4-149,8-25
Three-inch Control Valve (Deadman Valve) (M970 and M970A1) . . . . . . . . . . . . . . . . . . 4-86 4-146
Vapor Recovery Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9 1-13
Vapor Recovery Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-98 4-165
Ground Receptacle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-98 4-165
Vapor Recovery Hood and Hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-98 4-165
Vehicle Nozzle (M969 and M969A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14,4-97 3-36,4-165
Vehicle Nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22 8-33

Wheels, Hubs, and Drums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49 4-101

Installation and Adjustment as an Assembly
M967, M969, and M970 except M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49 4-104
M967A1, M969A1, and M970A1 including M970 SN TC-0843
TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49 4-108
Removal as an Assembly:
M967, M969, and M970 except M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49 4-101
M967A1, M969A1, and M970A1 including M970 SN
TC-0843, TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49 4-105
Tire and Wheel Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49 4-101
Wheel Bearings:
M967, M969, and M970 except M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49 4-104
M967A1, M969A1, and M970A1 including M970 SN
TC-0843, TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49 4-106
Wheel Studs:
M967, M969, and M970 except M970 SN TC-0843,
TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49 4-109
M967A1, M969A1, and M970A1 including M970
SN TC-0843, TC-0844, and TC-103 thru TC-178 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49 4-109

Index 16 Change 3 *U.S. GOVERNMENT PRINTING OFFICE 1993 -746-017780200 PIN: 045819-003
 TM 9-2330-356-14

lNDEX-Continued

Paragraph Page

Wiring, Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12 4-36

Wiring, Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16 4-45
Wiring Harness and Conduit, Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25 4-65
Wiring, Hose Reel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27 4-68

Index 17/(Index 18 Blank)

 By Order of the Secretary of the Army:

CARL E. VUONO
General, United States Army
Chief of Staff

Official:

THOMAS F. SIKORA
Brigadier General, United States Army
The Adjutant General

Distribution:

To be distributed in accordance with DA Form 12-37-E (Block 1560) Direct Support and General Sup-
port maintenance requirements for TM92330-356-14.

*U.S. GOVERNMENT PRINTING OFFICE: 1990 543-016/40001

PIN: 045819-000