REV.

3
OM521
612 TRENCHER

6175
3-POINT HITCH CAT. 1

9-20-04-4

OPERATOR'S
MANUAL
75421

BRADCO ®
P.O. Box 266 · Delhi, Iowa 52223 USA
(563) 922-2981 ·(800) 922-2981
Fax 563-922-2130

Printed in U.S.A.
COPYRIGHT
 TABLE OF CONTENTS

SECTION
TO THE OWNER .......................................................................................... A

SAFETY PRECAUTIONS ............................................................................. B

To The Operator
Before You Start
During Trencher Operation
Transporting The Trencher
Maintaining The Trencher

INTERNATIONAL SYMBOLS ...................................................................... C

PREOPERATION .......................................................................................... D
General Information
Hydraulics
Preparing The Tractor
Options
Trencher Major Nomenclature

MOUNTING KIT INSTALLATION ................................................................. E

Hydraulic Kits
Mounting Instructions

TRENCHER INSTALLATION ....................................................................... F

OPERATING INSTRUCTIONS ..................................................................... G

Controls
Operating Techniques

LUBRICATION .............................................................................................. H

TRENCHER ASSEMBLY ................................................................................I

DIGGING CHAIN OPTIONS.......................................................................... J

MAINTENANCE ............................................................................................ L

STORAGE.....................................................................................................M

TROUBLE SHOOTING ................................................................................. N

BOLT TORQUE ............................................................................................ O

SPECIFICATIONS ........................................................................................ P

DECALS ........................................................................................................ Q

PREDELIVERY CHECK LIST ....................................................................... R

LIMITED WARRANTY .................................................................................. S

6230
9-23-93
A A
TO THE OWNER

GENERAL COMMENTS

Congratulations on the purchase of your new trencher! Your trencher was

carefully designed and manufactured to give you many years of dependable
service. Your trencher will require some minor maintenance (such as cleaning
and lubricating) to keep it in top working condition. Be sure to observe all safety
precautions and maintenance procedures as described in this manual.

ABOUT THIS MANUAL

This manual has been designed to help you do a better, safer job. Read
this manual carefully and become familiar with it's contents. Remember, never
let anyone operate this trencher without reading the "Safety Precautions"
and "Operating Instructions" sections of this manual. (See Sections B and
G respectively.)
Unless noted otherwise, "right-hand" and "left-hand" sides are determined
from the position of the operator sitting in the tractor seat facing forward.

SAFETY ALERT SYMBOL

This is the "Safety Alert Symbol" used by this industry. This sym-
bol is used to warn of possible injury. Be sure to read all warnings
carefully. They are included for your safety and for the safety of
others working with you.

SERVICE

When servicing your trencher, remember to use only manufacturer re-

placement parts. Substitute parts may not meet the standards required for safe,
dependable operation.

To facilitate parts ordering, record the model and serial number of your
trencher in the space provided on this page. This information may be obtained
from the trencher identification plate located on the left hand side of the 3-point
hitch mounting frame.

MODEL DATE PURCHASED

SERIAL NO.

MOUNTED ON

Your parts dealer needs this information to insure that you receive the correct
parts for your specific trencher.

6176
7-26-93
B B
SAFETY PRECAUTIONS

TAKE NOTE! THIS SAFETY ALERT SYMBOL FOUND THROUGHOUT THIS

MANUAL IS USED TO CALL YOUR ATTENTION TO INSTRUCTIONS IN-
VOLVING YOUR PERSONAL SAFETY OR OTHERS. FAILURE TO FOLLOW
THESE INSTRUCTIONS CAN RESULT IN INJURY OR DEATH.

THIS SYMBOL MEANS:

ATTENTION!
BECOME ALERT!
YOUR SAFETY IS INVOLVED!

SIGNAL WORDS: Note the use of signal words DANGER, WARNING, and CAU-
TION with the safety messages. The appropriate signal word for each has been
selected using the following guidelines:

DANGER: Indicates an imminently hazardous situation, which if not avoided, will

result in death or serious injury. This signal word is to be limited to the
most extreme situations, typically for machine components
which, for functional purposes, cannot be guarded.

WARNING: Indicates a potentially hazardous situation, which if not avoided, could

result in death or serious injury, and includes hazards that are
exposed when guards are removed. It may also be used to
alert against unsafe practices.

CAUTION: Indicates a potentially hazardous situation, which if not avoided, may

result in minor or moderate injury. It may also be used to alert
against unsafe practices.

6621
5-18-95
B B
SAFETY PRECAUTIONS
TRENCHERS

GENERAL INFORMATION

This section is composed of various warnings and safety tips. Read and
learn all the information in this section before you attempt to use your tren-
cher. Also read your vehicle owner's manual before using your equipment. This
knowledge will help you operate your unit safely. Do not take this information
lightly, it is presented for your own benefit and for the benefit of others
working around you.

The "Safety Alert Symbol" , as previously described, will be used throughout

this manual. It will appear with one of the words DANGER, WARNING, or CAU-
TION above it, and a safety message pertaining to the specific topic being covered.
Take the time to read these messages as you come across them.

TO THE OPERATOR

The primary responsibility for safety with the equipment falls to the
operator. It is the skill, care, common sense, and good judgment of the
operator that will determine how efficiently and safely the job is performed.
Know your equipment before you start. Know its capabilities, dimensions,
and how to operate all the controls. Visually inspect your equipment before
you start, and never operate equipment that is not in proper working order
with all safety devices intact.

BEFORE YOU START

1. Wear the right clothing and gear for the job. Protective equipment
such as hard hat, steel toed shoes, leather gloves, or safety glasses
may be in order. They can protect you from needless injury.

2. Do not wear loose clothing, or things such as rings and watches

around the equipment. They could get caught in moving parts, and
lead to serious injury or death.

3. Know your equipment inside and out. Know how to operate all con-
trols, and know emergency shutdown procedures. Make sure all
safety devices are in place and working.

4. Keep all step plates, grab bars, pedals, and controls free of dirt,
grease, and oil. Keep equipment clean to help avoid injury from a fall
when getting on or off equipment.

4213
4-14-05-3
B B
SAFETY PRECAUTIONS
TRENCHERS

5. Do not use the trencher or crumber bar as a step, or grab the digging
chain when climbing on or off the trencher. Damage to the equip-
ment or personal injury could result.

6. Know your work area before you begin. Observe any potential hazard
areas such as soft ground, drop-offs, rocks and other obstacles.

7. Know where all utility lines are. Observe overhead electrical and
phone lines. Be sure equipment will safely clear them. Know the
location of underground cables, wires, gas and water lines, tanks,
etc. Contact with electrical lines could cause electrocution. Hitting a
gas line or underground tank could cause an explosion.

8. Be alert to others in the work area. Be sure others know when and
where you will be working. Make sure no one is underneath or behind
equipment.

9. Never try to board equipment while it's moving.

10. Always use your seatbelt and safety ROPS (Roll-Over-Protective

Structure) that are on the equipment. They could save your life in the
event of a mishap.

11. Never take passengers on your equiment. There is no safe place for
riders.

12. Test all controls before you start. This includes safety equipment and
devices.

DURING TRENCHER OPERATION

1. Be alert to what is going on around you. Watch for others who may
not be watching out for themselves.

2. Never operate equipment while under the influence of alcohol, or

prescription drugs which could inhibit physical and or mental capac-
ity.

3. Stop the trencher and shut off the engine if anyone approaches the
equipment while it's in motion. They may not be familiar with the
equipment and get in the way of moving parts.

4. Be alert to changes in the work area. Changes in weather and soil

conditions could turn a safe work site into a hazardous area.
4214
2-25-92-2
B B
SAFETY PRECAUTIONS
TRENCHERS
5. Keep equipment away from the trencher after it has been dug. The
weight of the unit could cause a cave-in.

6. Never drop a boom with a rapidly moving digging chain on the

ground. The force of the trencher may cause the vehicle to move
suddenly and unexpectedly. Have the chain moving slowly, and
lower the boom carefully when starting a new cut.

7. Use caution when digging on a slope. The natural vibration of the

trencher will make the unit creep sideways downhill. Try to dig with
the trencher in a level position.

8. Never try to make sharp turns while trenching. The trencher boom
could become wedged in the trench and damaged.

9. Never attempt to free a stuck chain with the unit running. If the
trencher does become jammed, stop the unit and visually inspect the
situation.

10. Check the trencher frequently for loose hardware and fittings. The
natural vibration of the unit will cause fasteners to loosen during
operation.

TRANSPORTING THE TRENCHER

1. Follow all federal, state, and local regulations when transporting the
unit on public roads.

2. Use a SMV (Slow Moving Vehicle) sign on the vehicle when trans-
porting. This will help alert others to your presence.

3. Be sure all lights and turn signals are in working order. Use them as
required.

4. When parking, park the unit on hard level ground and lower the tren-
cher boom. Block the wheels, and set the parking brake. Shut off the
engine.

5. Follow factory recommended shut down procedures for equipment.

6. Stop the trencher and vehicle before dismounting.

4215
2-26-92-2
B B
SAFETY PRECAUTIONS
TRENCHERS
MAINTAINING THE TRENCHER

1. Replace all safety shields and guards when performing maintenance.

Do not operate the trencher with protective equipment removed.

2. Lower the trenching boom, and shut off the engine before working on
the unit. Never perform maintenance on a trencher while it is run-
ning.

3. Make sure all operating and residual pressures are relieved before
working on a hydraulic system. Shut engine off, and operate all the
controls to relieve any pressure.

4. Use only manufacturer recommended replacement parts. Other parts

may be substandard in fit and quality.

5. Do not set any relief valve higher than recommended by the manufac-
turer. Relief valves should be checked and adjusted only by a trained
service technician. Do not remove or block a relief valve.

6. Observe proper maintenance schedules. Proper maintenance can help

prevent a hazardous condition.

7. Always wear safety goggles or glasses when working on equipment.

WARNING! Escaping fluid under pressure can have sufficient force to pen-
etrate the skin, causing serious personal injury. Fluid escaping
from a very small hole can be almost invisible. Use a piece of
cardboard or wood, rather than hands to search for suspected
leaks.
Keep unprotected body parts, such as face, eyes, and arms as
far away as possible from a suspected leak. Flesh injected
with hydraulic fluid may develop gangrene or other permanent
disabilities.
If injured by injected fluid, see a doctor at once. If your doctor
is not familiar with this type of injury, ask him to research it
immediately to determine proper treatment.

CARDBOARD

HYDRAULIC HOSE MAGNIFYING GLASS

OR FITTING

4216
2-26-92-2
C C
INTERNATIONAL SYMBOLS
As a guide to the operation of your equipment, various international
symbols have been utilized on the instruments and controls. The symbols
are shown below with an indication of their meaning.

Engine speed Alternator charge

Hours recorded Power take-off (on)

Engine water temperature Power take-off (off)

Lights "Tortoise," slow or minimum setting

Horn "Hare," fast or maximum setting

Engine oil pressure Caution

Hazard warning Control lever operating direction

Axle connect Rock shaft (raised)

Axle disconnect Rock shaft (lowered)

Continuously variable Remote cylinder (extended)

Increase Remote cylinder (retracted)

Decrease Remote cylinder (FLOAT)

Diesel fuel Differential lock

Creeper range Read operators manual

High range Neutral

Low range Forward

Reverse

3869
4-14-94-2
D D
PREOPERATION
612 TRENCHER

GENERAL INFORMATION

The 612 trencher mounts directly to the 3-point hitch system on your
tractor the same as any other 3-point hitch attachment. However, your tractor
will require a trencher hydraulic kit to adapt it's hydraulic system for trencher
use. A diagram of the trencher hydraulic kit for your tractor is shown in Section
"E". Use this diagrame to install the kit on the tractor before you attempt to
install the trencher itself.

HYDRAULICS

The hydraulic kit is furnished complete for proper hook up on the tractor
model specified with your order. These kits are "tractor specific" - Do Not Ex-
pect Them To Be Interchangeable.

PREPARING THE TRACTOR

Bradco 612 trenchers are used on 3-point hitch (Category 1) hydrostatic

tractors. Remote hydraulics between 4 and 7 GPM flow and a minimum working
pressure of 1800/2250 PSI, 540 RPM, and rear PTO drive are also required.

A front counterweight (such as a loader or dozer blade) may be necessary

to proper transportation and operation of the tractor and trencher. A minimum of
20% of the gross vehicle weight must be on the tractor's front axle. (See
"Weight and Balance" in Section "L".)

When mounting a 612 trencher on a Kubota 2150, 8200, or 9200 tractor

without loader, order the following hydraulic parts from Kubota parts department:
(3) 54203-3615 Bolts; (6) 6711-37180 Gaskets; (3) 70726-63612 Tubes.

When mounting on a John Deere 855 and 955 the tractor must be
equipped with an optional auxiliary hydraulic system.

OPTIONS

Eventually you may wish to dig a trencher of a depth or width other than
what your unit was originally equipped to dig. The trencher can be fitted with
optional booms, digging chains, sprockets, and crumber assemblies to allow you
to dig a variety of different sized trenches. The chart on the following page will
give you an idea of the different trench depths and widths a properly equipped
unit is capable of digging. For more detailed information on trencher options see
Sections "I" & "J" of this manual.

6227
9-21-93
D D
PREOPERATION
612 TRENCHER

TRENCH DEPTHS * TRENCH WIDTHS

30" Depth 4.25" 6.00" 8.00" 10.00" 12.00"

36" Depth 4.25" 6.00" 8.00" 10.00" -------
48" Depth 4.25" 6.00" 8.00" ------- -------
60" Depth 4.25" 6.00" ------- ------- -------

* Trencher depths are given with the digging boom at an optimum

65° digging angle and the auger touching the ground. Trenches of
various depths can be made by varying the digging angle and
raising the trencher up higher. These methods are less efficient
however.

NOTE: The illustrations and data used in this manual were current (according to
the information available to us) at the time of printing, however, we reserve the
right to redesign and change the trenchers as may be necessary without notifica-
tion.

6228
9-21-93
D D
PREOPERATION
612 TRENCHER
MAJOR COMPONENT NOMENCLATURE

GENERAL INFORMATION

The purpose of this page is to acquaint you with the 3-point hitch system,
the trencher, and the names of the various components. This knowledge will be
helpful when reading through this manual or when ordering service parts.

TRACTOR 3-POINT HITCH

SYSTEM COMONENTS LIFT ARM

LEVELING
ROCKSHAFT LIFT LINKAGE
TOP LINK
LIFT LINKAGE

UPPER HITCH
POINT

ANTI-SWAY CHAIN
LOWER LINKS
LOWER HITCH
POINT

PIVOT CYLINDER

612 TRENCHER
SYSTEM COMPONENTS MAINFRAME
GEARBOX

CRUMBER BOOM ADJUSTMENT

CRUMBER BAR/PERSONAL
RESTRAINT BAR

HEADSHAFT
AUGER
CRUMBER END
DIGGING BOOM

DIGGING TOOTH

CRUMBER WEAR STRIP

SHOE
BOOM END IDLER
6229
9-23-93
E E
MOUNTING KIT INSTALLATION
CASE IH 1140

FROM TRACTOR
AUXILIARY
HYDRAULICS

1 TO TRACTOR
AUXILIARY
HYDRAULICS

TO TRENCHER
CYLINDER

6208
9-15-93
E E
MOUNTING KIT INSTALLATION
CASE IH 1140

NO REQ'D PART NO. DESCRIPTION

1 2 35871 Hose Assembly .38" X 50"

(SAE 100R2-2Wire) 6FJX-6MP-HS

NOTE: Tractor must be equipped with auxiliary hydraulics.

IMPORTANT: The arrows used on this diagram show the direction of hy-
draulic flow through the hydraulic system. This fow pattern must be main-
tained for proper operation of the trencher. Improper hose routing could
result in possible damage to the trencher or vehicle.

6209
9-15-93
E E
MOUNTING KIT INSTALLATION
KUBOTA 2150 Without Loader
KUBOTA 8200/9200 Without Loader
HYDRAULIC ASSEMBLY #60359

1 2 3 4

FLOW DIVIDER
TRENCHER VALVE
5
7
6
PARTS SUPPLIED
BY KUBOTA DEALER
POWER 8
IN BEYOND 9
OUT IMPORTANT! 10
CONNECT HOSES TOGETHER
WHEN DISCONNECTING TRENCHER 11
12

13
14

15 3 2 4

NOTE: Arrows indicate flow direction.

When replacing hoses, always use original equipment parts or equal. Never
change to a lower grade hose than specified. Hose lengths are important to hose
routing and clearance requirements. Keep hoses away from operating person-
nel.

4235
7-23-02-2
E E
MOUNTING KIT INSTALLATION
KUBOTA 2150 Without Loader
KUBOTA 8200/9200 Without Loader
HYDRAULIC ASSEMBLY #60359

NO REQ'D PART NO. DESCRIPTION

1 1 35845 Hose Assembly .25" x 45"

(SAE 100R1-1Wire) 6FJX-4MP-HS
2 2 61464 Female Coupler
3 2 61465 Male Coupler
4 2 35547 Hose Assembly .25" x 52"
(SAE 100R1-1Wire) 6FJX-4MP-HS
5 1 3002 90° Elbow

6 1 3089 Bushing
7 1 3088 90° Adapter - Long
8 2 3320 90° Street Elbow
9 1 61538 Dust Plug
10 1 3197 Nipple

11 1 60355 Female Coupler

12 1 60356 Male Coupler
13 1 61537 Dust Cap
14 1 35430 Hose Assembly .25" x 88"
(SAE 100R1-1Wire) 6FJX-6MP-HS
15 1 3633 Hose Assembly .25" x 26"
(SAE 100R1-1Wire) 6FJX-4MP-HS

The following parts must be obtained from your Kubota dealer

REQ'D PART NO. DESCRIPTION
3 54203-36150 Banjo Bolt
6 67111-37180 Gasket
3 70726-63612 Hydraulic Tube

4236
7-23-02-2
E E
MOUNTING KIT INSTALLATION
KUBOTA 2150 With 350A Loader
KUBOTA 8200/9200 With 350 Loader
HYDRAULIC ASSEMBLY #62059
USE EXISTING HOSES TO LOADER
IMPORTANT!
HOOK UP WHEN TRENCHER
IS DISCONNECTED
IN OUT

FLOW DIVIDER LOADER

VALVE
PB

TRENCHER VALVE
1 2 3 4 5 6
7 4
IN 8

PB 10 3
9
OUT
1
6

11

4237
7-23-02-2
E E
MOUNTING KIT INSTALLATION
KUBOTA 2150 With 350A Loader
KUBOTA 8200/9200 With 350 Loader
HYDRAULIC ASSEMBLY #62059

NO REQ'D PART NO. DESCRIPTION

1 2 3880 Hose Assembly .25" x 104"

(SAE 100R1-1Wire) 6FJX-6MP-HS
2 1 61537 Dust Cap
3 2 60356 Male Coupler
4 2 60355 Female Coupler
5 1 3197 Nipple

6 2 3320 90° Street Elbow

7 1 3135 Tee
8 1 3178 Close Nipple
9 1 61538 Dust Plug
10 6 7104 Hose Tie

11 2 35547 Hose Assembly .25" x 118"

(SAE 100R1-1Wire) 6FJX-6MP-HS

NOTE: Arrows indicate flow direction.

When replacing hoses, always use original equipment parts or equal. Never
change to a lower grade hose than specified. Hose lengths are important to hose
routing and clearance requirements. Keep hoses away from operating person-
nel.

4238
7-23-02-2
E E
MOUNTING KIT INSTALLATION
FORD 1320 & 1520 With 7108 LOADER
HYDRAULIC ASSEMBLY #68590

FROM LOADER VALVE

POWER BEYOND
12

TO OIL RETURN PORT

(LOCATED UNDER
TRACTOR SEAT) 11

5
TRENCHER
VALVE

10

POWER
HYDRAULIC
BEYOND 7
MANIFOLD 2
BLOCK
9
3
TO
INLET 8 B
1

FROM 7
OUTLET 5

4
3 6

2
A

ASSEMBLY SHOWN WITH HIDROVER VALVE.

6192
9-1-93
E E
MOUNTING KIT INSTALLATION
FORD 1320 & 1520 With 7108 LOADER
HYDRAULIC ASSEMBLY #68590

NO REQ'D PART NO. DESCRIPTION

1 2 37324 Hose Assembly .25" X 84"

(SAE 100R2-2Wire) 6FJX-6MP-HS
2 2 60356 Male Coupler .38"
3 2 60355 Female Coupler .38"
4 1 3178 Nipple 6MP X CL-XH
5 2 3320 90° Street Elbow 6MP-6FP

6 1 35871 Hose Assembly .38" X 50"

(SAE 100R2-2Wire) 6FJX-6MP-HS
7 2 3007 Bushing 8MP-6FP
8 1 51339 Male Coupler .50"
9 1 51338 Female Coupler .50"
10 1 3130 Nipple 6MP X 4"-XH

11 1 35817 Hose Assembly .38" X 20"

(SAE 100R2-2Wire) 6FJX-6MP-HS
12 1 3269 Straight Adaptor 6MJ-8MBo

IMPORTANT: The arrows used on this diagram show the direction of hy-
draulic flow through the hydraulic system. This fow pattern must be main-
tained for proper operation of the trencher. Improper hose routing could
result in possible damage to the trencher or vehicle.

NOTE: This hydraulic kit comes complete with quick couplers for easy hook up.
When the trencher is removed, be sure to connect male coupler "A" to female
coupler "B" to complete the trencher hydraulic circuit. For the tractor/loader
hydraulic circuit, connect the male coupler of the loader valve "power beyond"
port hose to the coupler on the hydraulic manifold block. Install a dust cap and
plug on the remaining couplers to keep all systems free of dust and contami-
nants.
6193
9-1-93
E E
MOUNTING KIT INSTALLATION
DEUTZ ALLIS 5220 With 436 LOADER &
MASSEY FERGUSON 1020 With 1014 LOADER
HYDRAULIC ASSEMBLY #69586

TRENCHER VALVE

EXISTING HOSE
TO LOADER
1 EXISTING VALVE INLET
HYDRAULIC PORT
5
MANIFOLD
6
1 BLOCK
3
7

8 B
2

12 EXISTING HOSE
10 11 RETURN FROM
2 9 LOADER VALVE

13
3 6

11
4

EXISTING HOSE
FROM LOADER
VALVE POWER
BEYOND

ASSEMBLY SHOWN WITH HIDROVER VALVE

6196
9-7-93
E E
MOUNTING KIT INSTALLATION
DEUTZ ALLIS 5220 With 436 LOADER &
MASSEY FERGUSON 1020 With 1014 LOADER
HYDRAULIC ASSEMBLY #69586

NO REQ'D PART NO. DESCRIPTION

1 2 37066 Hose Assembly .25" X 37"

(SAE 100R2-2Wire) 6FJX-6MP-HS
2 2 60355 Female Coupler .38"
3 2 60356 Male Coupler .38"
4 1 3138 Straight Adaptor 6MP-8MJIC
5 1 37064 Hose Assembly .25" X 16"
(SAE 100R2-2Wire) 6FJX-6MP-HS
6 2 3007 Bushing 8MP-6FP
7 1 51753 .50" Dust Cap
8 1 51339 Male Coupler .50"
9 1 51754 .50" Dust Plug
10 1 51338 Female Coupler .50"

11 2 37065 Hose Assembly .25" X 27"

(SAE 100R2-2Wire) 6FJX-6MP-HS
12 1 3469 45° Adaptor 6MJIC-6FJX
13 1 3346 Tee 6MJIC-6MJIC-6FJX

IMPORTANT: The arrows used on this diagram show the direction of hy-
draulic flow through the hydraulic system. This fow pattern must be main-
tained for proper operation of the trencher. Improper hose routing could
result in possible damage to the trencher or vehicle.

NOTE: Hydraulic manifold bolts onto tratctor between differential casting and a
hydraulic port cover. This hydraulic port is located on the left side of the tractor
under the edge of the rear fender mounting by the 3-point lift arm.

This hydraulic kit comes complete with quick couplers for easy hook up. When
the trencher is removed, be sure to connect male coupler "A" to female coupler
"B" to complete the tractor/loader hydraulic circuit. For the trencher valve hoses,
connect the male coupler of the "power beyond" port hose to the coupler on the
"in" port hose. Install the dust cap and plug on the remaining couplers to keep
all systems free of dust and contaminants.

6197
9-7-93
E E
MOUNTING KIT INSTALLATION
JOHN DEERE 855 SERIAL NO. 820001 - UP
HYDRAULIC ASSEMBLY #69603

TRACTOR
AUXILIARY
HYDRAULICS

MALE COUPLER
SUPPLIED BY
DEALER

HOOK TRACTOR
AUXILIARY HYDRAULIC
COUPLERS TOGETHER
WHEN TRENCHER IS
NOT ATTACHED.

TRENCHER
VALVE 2

FEMALE COU-
PLER SUPPLIED
BY DEALER

TO
INLET

FROM
OUTLET

6194
9-2-93
E E
MOUNTING KIT INSTALLATION
JOHN DEERE 855 SERIAL NO. 820001 - UP
HYDRAULIC ASSEMBLY #69603

NO REQ'D PART NO. DESCRIPTION

1 1 35871 Hose Assembly .38" X 50"

(SAE 100R2-2Wire) 6MP-6FJX-HS
2 1 37072 Hose Assembly .38" X 27"
(SAE 100R2-2Wire) 6MP-6FJX-HS

IMPORTANT: The arrows used on this diagram show the direction of hy-
draulic flow through the hydraulic system. This fow pattern must be main-
tained for proper operation of the trencher. Improper hose routing could
result in possible damage to the trencher or vehicle.

NOTE: When the trencher is removed, be sure to connect the male and female
couplers (supplied by dealer) together, also hook tractor auxiliary hydraulic
couplers together to keep both tractor and trencher hydraulic circuits free of dust
and contaminants.
6195
9-2-93
E E
MOUNTING KIT INSTALLATION
DEUTZ ALLIS 5220 Without Loader
MASSEY FERGUSON 1020 Without Loader
HYDRAULIC ASSEMBLY #72569

ORIGINAL HYDRAULIC
PORT COVER

4 3 1
10

5
6 7
10
8

10 12
B
14 13
15 13
16 A
TRENCHER VALVE 17 12
15
18

10

11 11

IMPORTANT: The arrows used on this diagram show the direction of hydraulic flow
through the hydraulic kit. This flow pattern must be maintained for proper operation of
the trencher. Improper hose routing could result in possible damage to the trencher or
tractor.

6198
8-2-02-2
E E
MOUNTING KIT INSTALLATION
DEUTZ ALLIS 5220 Without Loader
MASSEY FERGUSON 1020 Without Loader
HYDRAULIC ASSEMBLY #72569

NO REQ'D PART NO. DESCRIPTION

1 2 3002 90° Elbow 6MP-6MJ

2 1 3430 90° Adapter 6MJ-6FJX
3 1 52203 Hydraulic Manifold
4 3 45003 O-Ring
5 3 2612 M8 x 80mm Hex Capscrew DIN 931

6 3 2531 8mm Lock Washer

7 3 2511 8mm Flat Washer
8 1 3089 Bushing 6MP-4FP
9 1 3120 45° Adapter 4MP-6MJ
10 4 37065 Hose Assembly .25" x 27" 6MP-6FJX-HS

11 2 37066 Hose Assembly .25" x 37" 6MP-6FJX-HS

12 2 60355 Female Coupler
13 2 60356 Male Coupler
14 1 51754 Dust Plug
15 2 3007 Bushing 8MP-6FP

16 1 51338 Female Coupler

17 1 51339 Male Coupler
18 1 51753 Dust Cap

NOTE: Hydraulic manifold bolts onto tractor between differential

casting and a hydraulic port cover. This hydraulic port is located on the left
side of the tractor under the edge of the rear fender mounting by the 3-
point lift arm.

This hydraulic kit comes complete with quick couplers for easy hook up.
When the trencher is removed, be sure to connect male coupler "A" to
female coupler "B" to complete the tractor hydraulic circuit. For the tren-
cher valve hoses, connect the male coupler of the "power beyond" port
hose to the female coupler on the "in" port hose. Install the dust cap and
plug on the remaining couplers to keep all systems free of dust and con-
taminants.
6199
8-2-02-2
E E
MOUNTING KIT INSTALLATION
612 TRENCHER

GENERAL INFORMATION
The 612 trencher mounts directly to the 3-point hitch system on your
tractor. However, a trencher hydraulic kit is required to provide power to your
trencher. Diagrams and parts lists are located at the beginning of this section.
Study the hydraulic diagram for the hydraulic kit you have received, and major
component nomenclature (Section "D") to familiarize yourself with the names of
the various components. This knowledge will assist you in understanding these
instructions and also the Trencher Installation Instructions "Section "F".
The hydraulic kit is furnished complete for proper hook up on the tractor
model specified with your order. These kits are "tractor specific" and are not
interchangeable.

HYDRAULIC SYSTEM INSTALLATION

Install hydraulic hoses, fittings, and couplers needed to obtain power to
the trencher as shown in the hydraulic kit diagram at the beginning of this sec-
tion.

IMPORTANT: The arrows used on the hydraulic kit diagrams show the
direction of hydraulic flow through the hydraulic system. This flow pattern
must be maintained for proper operation of the trencher. Improper hose
routing could result in possible damage to the trencher or tractor.

After installation is complete, couple power beyond and pressure hoses

together while making sure all other hose ends are capped or plugged, Start the
tractor.
Check the hydraulic system for leaks.
Check 3-point hitch for correct operation.

NOTE: Return hose will not be hooked up at this time. 3-point operation
indicates the connections have been properly completed.

WARNING! Escaping fluid under pressure can have sufficient force to

penetrate the skin causing serious personal injury. Fluid
escaping from a very small hole can be almost invisible. Use a
piece of cardboard or wood, rather than hands to search for
suspected leaks.
Keep unprotected body parts, such as face, eyes, and arms as
far away as possible from a suspected leak. Flesh injected
with hydraulic fluid may develop gangrene or other permanent
disabilities.
If injured by injected fluid, see a doctor at once. If your doctor
is not familiar with this type of injury, ask him to research
immediately to determine proper treatment.
6231
9-30-93
F F
TRENCHER INSTALLATION
612 TRENCHER

GENERAL INFORMATION

The following instructions will help you to mount the trencher onto your
tractor. The trencher uses the 3-point hitch system for ease of installation,
therefore if you have ever installed 3-point hitch equipment before, installing the
trencher should prove no problem.

You must install the appropriate "Trencher Hydraulic Kit" prior to installing
the trencher. If you have not installed the hydraulic kit, turn to Section "E" and
do so now. Remember to read all safety warnings, decals, and operating in-
structions before operating the tractor or trencher.

IMPORTANT: A front counterweight may be necessary for proper transpor-

tation and operation of the tractor and trencher. A minimum of 20% of the
gross vehicle weight must be on the tractor's front axle. (Refer to the infor-
mation on Weight and Balance at the end of this section.)

MOUNTING INSTRUCTIONS

1. If you have not done so already, remove the steel shipping banding from
around the trencher and skid.

2. Install the PTO drive assembly to the trencher by installing the key #5661
in the input shaft #59960 of the trencher gear box and sliding the clutch
end of the PTO drive assembly onto the shaft.

3. Secure drive assembly to input shaft with set screw #1575, capscrew
#1044, lock washer #1503 and PTO keeper #62089.

4. Following the proper start up and backing procedures as noted in your

tractor operator's manual, back the tractor up to the rear of the trencher
and skid.

5. Adjust the tractor's 3-point hitch system to accept the trencher. Continue
backing the tractor up to the trencher and then attach the trencher by
positioning the lower links onto the trencher's hitch pins. Secure with klik
pins #57496.

NOTE: Since the trencher is fairly heavy, we recommend you position the
lift links of the lower links in the position offering the greatest lift capabili-
ties. If there is more than one hole in the lower link, position the lift link in
the rear most hole.

6223
9-21-93
F F
TRENCHER INSTALLATION
612 TRENCHER

6. Position the top link of the tractor in place between the ears of the gear
box assembly's top linkage. Use the mounting hole in the linkage that will
allow ALL THREE 3-POINT LINKS TO RUN PARALLEL. Secure the top
link using the capscrew #1151 and nut #1534 provided. See Figure #1

FIGURE #1

Okay for digging. Okay for transport. Too low. Too

Too much bend for much bend for
PTO operation. PTO operation.

7. Adjust the lower link anti-sway chains and center the trencher.

8. Complete the hydraulic plumbing by connecting the hydraulic couplers

together as shown on your "Trencher Hydraulic Kit" diagram.

NOTE: In most cases a single spool valve operates the trencher pivot
cylinder and thus the trencher boom lift. If your tractor is so equipped
refer to your tractor operator's manual to ensure correct plumbing between
the valve and the tractor's external auxiliary hydraulic service.

WARNING! Escaping fluid under pressure can have sufficient force to

penetrate the skin causing serious personal injury. Fluid
escaping from a very small hole can be almost invisible. Use a
piece of cardboard or wood, rather than hands to search for
suspected leaks.

Keep unprotected body parts, such as face, eyes, and arms as

far away as possible from a suspected leak. Flesh injected
with hydraulic fluid may develop gangrene or other permanent
disabilities.

If injured by injected fluid, see a doctor at once. If your doctor

is not familiar with this type of injury, ask him to research it
immediately to determine proper treatment.
6224
9-21-93
F F
TRENCHER INSTALLATION
612 TRENCHER

NOTE:
When connecting trencher to tractor, route the hydraulic hoses as
far away as possible from the operator. Also use care to route away from
sharp corners and from dragging on the ground.
When disconnecting trencher from tractor either plug, cap or con-
nect hose ends to keep system free from contaminants. (Refer to your
"Trencher Hydraulic Kit" diagram in Section "E".)

9. With the hydraulics hooked up, raise the trencher and remove the skid.

10. Lower the trencher to the ground. Disconnect the top link from the tractor
and tilt the trencher away from the tractor. (It may also be necessary to
raise the trencher into the extreme UP position to gain sufficient clearance
to connect PTO drive assembly to tractor.)

11. Turn the tractor engine off and set the parking brake.

NOTE: To protect PTO shaft and operator, the up travel must be limited to
keep at least 3" of the two halves of the PTO shaft together. To assist the
operator in maintaining this limitation measure in 3" from the telescopic
tube on the trencher half of the PTO shield and make a permanent mark
around the diameter.

12. Connect the PTO drive assembly to the tractor.

13. Attach PTO shield and safety chains as shown in Figure #2.

FIGURE #2 CAUTION! Always install PTO drive

guard safety chains before
operating trencher.

Safety chains are used to hold the PTO drive

guard from spinning. There are two chains to
hold both halves of the PTO drive.
To mount chains:
A. Wrap chain around left 3-point hitch
arm and clip it back to it leaving some
slack for free movement when raising
and lowering trencher.
B. It may be necessary if the chain is too
short to clip the chain to a loop on the
side of the 3-point arm. Care should
A be taken not to have too much loop in
the chain so it does not wrap around
B the PTO drive when it is rotating.

6225
9-21-93
F F
TRENCHER INSTALLATION
612 TRENCHER

14. Adjust 3-point lever upper stop to limit the travel to a point where trencher
will clear the ground sufficient for transport and still keep at least 3" of
shaft telescoped together.

15. Start the tractor and raise the trencher boom UP. Operate the 3-point
hitch lifts to determine if its capacity is sufficient and all points work prop-
erly. Observe hydraulic hoses for correct routing as 3-point moves up
and down. Adjust tractor (see tractor operator's manual) to limit rate of
drop of 3-point to a safe speed.

16. Complete the "Pre-Delivery Checklist" located in Section "R".

17. Trencher installation is now complete. Again you are reminded to read all
safety warnings, decals, and operating instructions before operating the
trencher.

WEIGHT AND BALANCE

After you have completed the mounting procedures, a very important item
to complete before releasing for use is weight distribution for steering control.
Tractor front attachments such as a loader or blade may be sufficient, however,
you must know. Industry recommended practice states that 20% of the gross
vehicle weight should remain on the front axle during transport conditions.
To perform this check, weigh the entire machine with attachments, both
front and rear in transport position. Record results. Next weigh each axle sepa-
rately and record results.
Example A: GVW 2650 lbs
Front 600 lbs
Rear 2050 lbs
2650 X 20% = 530 lbs - recommended front axle weight
You have 600 lbs which exceeds the 530 necessary to meet industry
recommended practice.
Example B: GVW 3275 lbs
Front 595 lbs
Rear 2860 lbs
3275 X 20% = 655 lbs - recommended front axle weight
You have 595 which is 60 lbs less than the recommended 655 lbs. You
will need to add 75 lbs to the front axle to attain the industry recommended
practice weight distribution.
This is calculated as follows:
Old GVW = 3275 lbs New GVW add 75 lbs = 3350
3350 X 20% = 670 lbs - recommended front axle weight
You may use weights or tire ballast to accomplish you goal.

6226
9-21-93
F F
TRENCHER INSTALLATION
612 TRENCHER

POWER (PTO) SHAFT ADJUSTMENT

The power (PTO) shaft assembly may need to be shortened to fit up
to your tractor correctly. The shaft assembly is shortest when the trencher
is engaged into the ground and the shaft is straight inline with the trencher
gearbox.
TRACTOR

TRACTOR
PTO

.25" FULLY
RETRACTED TRENCHER
GEARBOX

There should be a minimum of .25" of free travel before the shaft is

fully retracted. To check:
a. Lower the trencher until the shaft is parallel to the
ground and is straight inline with the trencher gearbox.
b. Detach the shaft at the tractor and pull back to see if
there is a minimum of .25" free travel.

If there is not at least .25" of free travel the shaft must be shortened.

CAUTION FAILURE TO HAVE THE REQUIRED DISTANCE OF CLEARANCE

WILL DAMAGE THE POWER TAKE OFF (PTO) OF YOUR TRAC-
TOR.

TO SHORTEN THE POWER SHAFT:

CUT EQUAL AMOUNTS OFF OF EACH SHAFT HALF TO

ACQUIRE A MINIMUM OF .25" OF FREE TRAVEL WHEN
THE SHAFT IS FULLY RETRACTED.
7539
11-4-98
G G
OPERATING INSTRUCTIONS
CONTROLS
612 TRENCHER

GENERAL INFORMATION
Simplicity of operation is one of the key features of the 612 trencher.
There is only one control on the trencher itself, and just a few adjustments to
check. It is important however to be familiar with, and know the controls and
adjustments on both the trencher and the tractor. Such knowledge is crucial for
safe, efficient operation of equipment. Take the time to learn how they operate
now.

THE TRACTOR
Your trencher mount to the 3-point hitch system of the tractor. Due to this
arrangement, thorough knowledge of the tractor and hitch controls is necessary
for trencher operation. Read your tractor owner's manual for information regard-
ing tractor operation before attempting to use the trencher.

RAISING / LOWERING THE TRENCHER

Raise / lower the trencher unit by raising / lowering the tractor 3-point
hitch arms through their appropriate tractor controls.

CAUTION! Become aware of any overhead power or telephone lines, tree

limbs, etc. that the raised trencher could come into contact
with. Contact with electrical lines could cause electrocution
and death.

TILTING THE TRENCHER

Tilt the trencher unit up or down by operating the control valve located on
the trencher gear box linkage. Pushing the lever to the "down" position (away
from the operator) will tilt the boom toward the ground. Pulling the lever to the
"up" position (toward the operator) will tilt the boom up. See Figure #1

FIGURE #1

CONTROL VALVE DECAL

STARTING AND STOPPING THE TRENCHER

Power to the trencher is supplied by the tractor's PTO. Power is trans-
ferred from the PTO shaft, through the trencher's PTO drive shaft, through the
trencher's PTO drive shaft and gear box, and finally to the trencher's auger,
drive sprocket, and digging chain. Start the digging chain by engaging the
tractor PTO. Stop the digging chain by disengaging the tractor PTO.
6232
9-30-93
G G
OPERATING INSTRUCTIONS
CONTROLS
612 TRENCHER

TRENCHER SPEED CONTROL

Again it may be noted that power to the trencher is supplied by the tractor
PTO. To increase trencher speed, increase the tractor PTO shaft speed. To
decrease trencher speed, decrease PTO speed.

AUGER HEIGHT
The auger is fixed to the trencher mainframe and has no separate adjust-
ment. To raise the auger, raise the trencher as previously described. This will
raise the auger and thus leave the dirt or spoil closer to the trench.

Lowering the trencher will cause the auger to lower, moving the spoil
away from the trench. The auger should NOT be lowered to the extent that the
auger itself starts to dig in the ground. This will greatly reduce efficiency.

It should be noted that raising or lowering the trencher to change the

auger height will also change the trencher depth. You will need to compensate
for this by changing the tilt of the trencher down or up accordingly. See Figure
#2

FIGURE #2
TRENCHER

AUGER
AUGER

SPOIL

SPOIL

6233
9-30-93
G G
OPERATING INSTRUCTIONS
CONTROLS
612 TRENCHER

CRUMBER SHOE / BAR ADJUSTMENT

The purpose of the crumber shoe is to keep any loose dirt in the trencher
close enough to the digging chain so that the digging teeth can grab it and
remove it. This will give you a cleaner finished trench. Your trencher has an
adjustable crumber bar / restraint bar that can be lengthened or shortened to
bring the crumber shoe closer to or farther away from the digging chain.

To adjust the crumber bar length, loosen the two jam nuts found at the
end of the mainframe crumber bar tube. With the jam nuts loose, loosen the set
screws on the tube. Slide the bar in or out to achieve the desired spacing (we
suggest a distance of about 4" between crumber shoe and digging teeth for best
overall results). Tighten the set screws and jam nuts when finished. See Figure
#3

FIGURE #3

SET

MAINFRAME CRUMBER
BAR TUBE

JAM NUT

SCREW
CRUMBER BAR / PERSONAL
RESTRAINT BAR

CHAIN TENSION ADJUSTMENT

Chain tension is maintained by a large spring located inside the boom and
adjusted by moving the boom in or out of the boom clamp plates located at the
trencher end of the boom.

On the shorter booms (30" & 36") loosen the four clamp plate bolts.
Tighten the chain by using a prying action over the pivot rod, located on the
boom clamp plate, and through the holes in the side of the boom with a large
punch, until the boom end is approximately 1.25" - 1.38" from the boom tube.
Tighten the four clamp plate bolts to secure boom in place. Torque to 80 ft. lbs.
See Figure #4
6234
10-1-93
G G
OPERATING INSTRUCTIONS
CONTROLS
612 TRENCHER

BOOM CLAMP
FIGURE #4 PLATES

CLAMP BOLTS

TRENCHER MAINFRAME
1.25" - 1.38"

PIVOT ROD

LARGE PUNCH

BOOM TUBE

(DIGGING CHAIN NOT SHOWN

BOOM END
FOR CLARITY)

For the longer booms (48" & 60") a chain tightener kit is included in the
boom assemblies. To tighten chain loosen the four clamp plate bolts. Turn the
adjusting nut clockwise until proper tension is obtained, the boom end should be
approximately 1.25" - 1.38" from the boom tube. Tighten the four clamp plate
bolts to secure boom in place. Torque to 80 ft. lbs. See Figure #5

FIGURE #5

BOOM CLAMP
PLATES
CLAMP BOLTS

ADJUSTING STUD BOLTS

TRENCHER MAINFRAME
1.25" - 1.38"

GUIDE TUBE
ADJUSTING NUT

ADJUSTING STUD
BOOM TUBE

(DIGGING CHAIN NOT SHOWN BOOM END

FOR CLARITY) 6235
10-1-93
G G
OPERATING INSTRUCTIONS
CONTROLS
612 TRENCHER

If the adjusting stud is too short to obtain proper chain tension tighten the
four clamp plate bolts. Remove the two adjusting stub bolts which hold the
adjusting stud in place. Reposition the adjusting stud to a position closer to the
guide tube. Reinstall the adjusting stud bolts and then repeat the original proce-
dure until proper tension is obtained.

If chain runs off in rocky ground or large roots, tighten further. Chain
tension is important to monitor since excessive tension will cause high wear
rates on the chain and sprockets and less than enough tension will cause run off
problems.

CAUTION! Never work on, or make adjustments to any part of the tren-
cher while the unit is running. You could get caught in the
digging teeth and be severely injured or killed.

It is common for your trencher to need it's digging chain tightened after
the first 10 to 20 minutes of operation as the chain and sprocket seat them-
selves.

6236
10-1-93
G G
OPERATING INSTRUCTIONS
OPERATING TECHNIQUES
3-POINT HITCH TRENCHERS

GENERAL INFORMATION

The design of your trencher makes it relatively simple to use. With the
help of the information in this section and a little practice you should become
proficient in it's operation in no time. Observe the following points to obtain the
best results with the least amount of wear on the machine. Read the "Safety
Precautions" Section "B" before you begin.

CAUTION! Operate the trencher only when seated at the tractor controls.

Do Not operate the tractor without proper ROPS (Roll-Over-

Protective-Structure), seat belt, and hard hat.

Pay attention to the job at hand. Be alert to the possibilities of

others in the work area.

Never let anyone work around, or perform maintenance on the

trencher while it is running.

BEFORE YOU START TRENCHING

Before any excavating is started, it is always a good idea to plan out the
job first. Various things need to be considered and taken into account prior to
the actual trenching. The operator should inspect the job site and take notice of
any potential hazards in the area. He should have a complete understanding of
the tasks he is expected to perform. Figure out what will be done with the spoil
(excavated soil), will it be used to backfill or be trucked out? What are the soil
conditions like? Will you have to work around others? Etc.

WARNING! Check the prospective trenching area for hidden utility lines
before operating the trencher. Contacting a utility line with the
trencher could cause electrocution or possible explosion
resulting in death. Call all utility companies and have them
plot out all their lines first. If you damage a utility line, shut off
the equipment at once and contact the affected utility immedi-
ately.

Once you have become familiar with the job site and understand the job
requirements it is time to set up for the actual trenching. Check the soil type
(hard, soft, rocky, etc.) and the trenching requirements (how deep, wide, etc.).
Install the proper digging chain, boom, crumber boom and shoe for the job at
hand. (Information on chain, boom, crumber boom and shoe may be found in
Section "I" and "J".)
6237
10-4-93
G G
OPERATING INSTRUCTIONS
OPERATING TECHNIQUES
3-POINT HITCH TRENCHERS

Mark off the area to be trenched out. This can be done with powdered
line, chalk, or a guide string and stakes. Block off the area from others if pos-
sible.

STARTING THE TRENCH

Position the tractor with the trencher boom directly over the center of the
trench layout. It will take about 4' of trenching before the trencher will be able to
operate at the desired level, so plan for this and position the trencher about 4'
behind where you want the actual trench to start. Apply the tractor foot brake.
This will prevent the tractor from being pulled backward when the digging teeth
contact the ground.

NOTE: The tractor is driven forward when trenching. You cannot trench
driving the tractor in reverse.

Raise the trencher with the 3-point hitch arms and tilt the trencher down at
a 30° angle. See Figure #6. Position the unit so that the digging teeth are just
above ground level. The PTO drive shaft should be approximately level.

FIGURE #6
TRACTOR

TRENCHER

PTO DRIVE SHAFT

30° ANGLE

Set the tractor engine speed at half throttle. Engage the tractor PTO to
540 RPM to start the digging chain in motion.

CAUTION! When lowering a moving digging chain to the ground the force
of the teeth grabbing the ground will try to pull the tractor
suddenly backwards. BE PREPARED. Have the brake on the
tractor set to help counteract the force. 6238
10-4-93
G G
OPERATING INSTRUCTIONS
OPERATING TECHNIQUES
3-POINT HITCH TRENCHERS

Slowly lower the digging chain into the ground to start the trench. Do this
by lowering the trencher with the 3-point hitch arms. To begin trenching, always
lower the 3-point hitch first, followed by the trencher boom using the trencher
controls. A combination of the 3-point hitch and trencher boom position will give
the desired trench depth and spoil placement. Operate the PTO driveline at the
correct boom approach angle. Greater angles may cause premature component
failure. Continue lowering the unit until the crumber end rolls all the way back on
the crumber bar. See Figure #7.

IMPORTANT: After the crumber end has rolled all the way back, do not
lower the trencher any farther without engaging the tractor forward drive.
Failure to do so could result in bending of the crumber bar, which is NOT
covered by the warranty.

FIGURE #7

BOOM / DIGGING CHAIN BOOM / DIGGING CHAIN

CRUMBER END
ROLLED
BACK

GROUND LEVEL

Once the crumber end has "bottomed out", engage the tractor's forward
drive and begin slowly creeping the tractor forward while continuing to lower the
trencher boom to the desired depth. When nearing the required depth, stop
lowering and tilt the trencher to a 60° - 65° angle. A 60° - 65° angle works best
for general trenching.

WARNING! Be alert to what is happening around you. Look ahead before

moving the tractor to trench. Be aware of any person or thing
in the path of the tractor. Observe any terrain changes such
as drop-offs or soft ground.

When trenching, remember to keep in mind the spoil placement. Position

the trencher so that the auger floats at ground level to move spoil away from the
trench. 6239
10-4-93
G G
OPERATING INSTRUCTIONS
OPERATING TECHNIQUES
3-POINT HITCH TRENCHERS

Raise the trencher so that the auger rides above ground level to leave the
spoil beside the trench. The high the auger the closer to the trench the spoil will
be placed. See Figure #8.
TRENCHER
FIGURE #8
AUGER
TRENCHER AUGER
SPOIL

SPOIL
3" - 6"

You may find that it generally takes less power to run the digging chain if
the auger auger runs 3" - 6" (inches) off the ground, and thus increasing the
potential footage of trench produced per hour. The higher you want the auger,
the more vertical you will have to tilt the trencher to achieve the same trench
depth.

With the desired trench depth reached, advance the tractor throttle to the
desired engine RPM. Continue creeping the tractor forward.

STALLING THE TRENCHER

If the trencher stalls while digging, move the tractor backwards slightly to
free the trencher.

TURNING WHILE TRENCHING

Gradual turns can be made while trenching. However the tightness of the
turn is directly proportional to the angle and length of the boom. In other words,
the greater the angle of the trencher boom to the ground level, the sharper the
turn that can be trenched, See Figures #9 and #10.
6240
10-4-93
G G
OPERATING INSTRUCTIONS
OPERATING TECHNIQUES
3-POINT HITCH TRENCHERS

Also the shorter the boom length the sharper the possible turn. Remem-
ber, the greater the increase in boom angle the higher the unit will have to be
raised out of the trench to keep a unified trench depth. Shallow boom angles will
severely limit turning ability.

IMPORTANT: Turning to tightly while trenching will cause the trencher to

jam in the trench and stall. Turning to tightly can also cause the trencher
boom to bend. Take it easy when turning. Proceed slowly with caution.

FIGURE #9

TURNING WITH THE BOOM

AT A 90° DIGGING ANGLE

TOP VIEW

FIGURE #10

TURNING WITH THE BOOM

AT A 60° DIGGING ANGLE
TOP VIEW

MAKING SHARP TURNS

To make sharp turns and 90° angle you will have to dig two trenches. Dig
the first trench as you normally would. Then reposition the unit and dig the
second trench at the appropriate angle. Be sure to take into account the extra
lead-in space needed for the trencher to get down to the desired trench depth.
See Figure #11. 6241
10-4-93
G G
OPERATING INSTRUCTIONS
OPERATING TECHNIQUES
3-POINT HITCH TRENCHERS

FIGURE #11
1st TRENCH

TOP VIEW

2nd TRENCH
LEAD - IN

RECOMMENDED DIGGING ANGLES

A 90° digging angle is recommended for use in rock and frost conditions,
and when trenching sharp corners. The 90° angle reduces excessive side pres-
sure on the boom and digging chain when trenching corners.

A 60° - 65° digging angle is recommended for normal trenching. At this

angle there will be less carryover, and a cleaner trench bottom than can be
maintained at a 90° angle.

TRENCHING WITHOUT THE CRUMBER BAR / PERSONAL RESTRAINT BAR

WARNING! The crumber bar / personal restraint bar and crumber assem-
bly are there for a reason, YOUR SAFETY! There are a few
instances however, where removal may be necessary. In these
cases operate with extreme caution. Reinstall the crumber bar
/ personal restraint bar and crumber assembly as soon as
possible.

You can use your trencher to dig under obstacles such as sidewalks. To
do so, remove the crumber bar / personal restraint bar and crumber assembly
and start your trench as before within a foot of the sidewalk. With the crumber
bar / personal restraint bar removed you can start the trench vertically without
any lead-in space.

When the desired depth has been reached, tilt the trencher at 60° angle
while digging, then creep the tractor backward and trench under the side walk.
Be careful not to contact the edge of the sidewalk with the digging teeth.
6242
10-4-93
G G
OPERATING INSTRUCTIONS
OPERATING TECHNIQUES
3-POINT HITCH TRENCHERS

After you have gone as far as you can without contacting the sidewalk,
drive the tractor forward to clear the sidewalk and remove the trencher from the
trench. Line up the unit on the other side of the walk and continue to trench as
described above until the two trenches are connected. See Figure #12.

FIGURE #12

CREEP BACKWARD

CRUMBER BAR AND ASSEMBLY

REMOVED. REPLACE AS SOON AS
POSSIBLE.

SIDEWALK

2nd TRENCH 1st TRENCH

AVOID CONTACTING SIDEWALK

Reinstall the crumber bar / personal restraint bar and crumber assembly
immediately. Some spoil will be left in the trench since the crumber was re-
moved during the operation.

ENDING THE TRENCH

When you have dug your trench, remember that the trencher boom is at
an angle, and that you must continue trenching until the end of the boom has
dug past the proposed end of the trench. Once the end of the trench has been
dug, keep the trencher running and lift the unit clear of the trench. When the
trencher has cleared the trench, disengage the PTO to stop the trencher. Drive
the tractor away from the trench.
6243
10-4-93
G G
OPERATING INSTRUCTIONS
OPERATING TECHNIQUES
3-POINT HITCH TRENCHERS

TRANSPORTING THE TRENCHER

When transporting the trencher, remember to keep the trencher as low to

the ground as is practical. The lower the trencher rides, the more stable the
tractor will be. You do not want the trencher so low that the digging teeth touch
ground in rough terrain. Shut off the trencher before moving it away from the
trench. Never transport the trencher around the job site or anywhere else while
the digging chain is moving.

TRENCHER PERFORMANCE

Trencher performance is related to how well it's maintained, digging tooth

wear, and type and size of digging chain, crumber boom and shoe used. For
information on chain, boom, and crumber options see Section "I" and "J". If
problems arise see "Trouble Shooting" Section "N".

6244
10-4-93
H H
LUBRICATION

GENERAL INFORMATION
Economical and efficient operation of any machine is dependent upon
regular and proper lubrication of all moving parts with a quality lubricant. Ne-
glect leads to reduced efficiency, heavy draft, wear, breakdown, and needless
replacement parts.
All parts provided with grease fittings should be lubricated as indicated. If
any grease fittings are missing, replace them immediately. Clean all fittings
thoroughly before using grease gun.

IMPORTANT: Avoid excessive greasing. Dirt collects on exposed grease

and greatly increases wear. After greasing, wipe off excessive grease from
fittings.

LUBRICATION
Lubricate grease zerks at mainframe / gear box pivot and also at end of lift
cylinder, every (8) eight hours.
Grease PTO Drive before putting trencher into operation and at specified
intervals thereafter.

GREASE INSIDE OF OUTER TELESCOPING TUBE (EVERY 20 HOURS)

Frequency of Lubrication:
(Swing joint sideways for greasing.)
8H 8H 8H 8H

* When used in winter the outer tube must be greased to prevent it freezing
solid!
EVERY 40 HOURS OF OPERATION
The oil level in the gear box should be checked once a week. Proper
level of lubricant in the gear box is approx. 3.50" (about 6 pints). Fill as neces-
sary with #90 transmission oil.

The previously mentioned areas are the only ones that require lubrication.
No lubrication is needed on any other part of the trencher. Boom assemblies do
not require any lubricating. DO NOT lubricate the digging chain. Lubricating the
chain will only cause dirt to collect on the chain resulting in increased chain
wear. 6178
9-17-93
I I
TRENCHER ASSEMBLY
ASSEMBLY #60969
DIAGRAM 1 OF 2

1
6
5
4 17
3 18
7
2
16
15
8 14
9
10
19
20
11

12

13 21

38
51
37
36 49
26 27 50
35
25
24
23
22 34
33
32
31 16
16
15
30 15
28
29 42
44 48
41 47
46
43
45
39 40

6200
3-7-95-2
I I
TRENCHER ASSEMBLY
ASSEMBLY #60969
LIST 1 OF 2

NO REQ'D PART NO. DESCRIPTION

1 1 60964 Lift Cylinder

2 2 1534 .75" UNC Nylock Nut
3 1 59943 Cylinder Mounting Ear
4 1 57457 Pin
5 2 57462 Thrust Washer

6 2 6612 Snap Ring

7 2 1151 .75" UNC X 6.00" Hex Capscrew
8 1 1054* .38" UNC X 3.75" Hex Capscrew
9 1 1503 .38" Lock Washer
10 1 82784* PTO Retainer

11 1 1575 .38" Set Screw

12 1 5661 Key .31" X 1.38"
13 2 57496 Hitch Pin
14 1 60544 Pipe Spacer
15 9 1228 .50" UNC Hex Nut

16 9 1505 .50" Lock Washer

17 1 60005 Mounting Plate
18 4 1089 .50" UNC X 1.25" Hex Capscrew
19 1 1765 Retaining Ring
20 1 6623 Thrust Washer

21 1 59994 Gear Box

22 1 1113 .62" UNC X 1.25" Hex Capscrew
23 1 1506 .62" Lock Washer
24 1 1517 .62" Flat Washer
25 1 59998 Sprocket

26 1 5662 Key .38" x 1.38"

27 1 59950 Spacer Tube
28 1 53298 Connecting Link
29 1 53297 Chain No. 80
30 1 53743 Key .50" x 1.50"

* PTO retainer #82784 and #1054 capscrew replaced PTO keeper #62089
and #1044 capscrew on 2-8-95.
6201
12-13-99-3
I I
TRENCHER ASSEMBLY
ASSEMBLY #60969
DIAGRAM 2 OF 2

1
6
5
4 17
3 18
7
2
16
15
8 14
9
10
19
20
11

12

13 21

38
51
37
36 49
26 27 50
35
25
24
23
22 34
33
32
31 16
16
15
30 15
28
29 42
44 48
41 47
46
43
45
39 40

6202
3-7-95-2
I I
TRENCHER ASSEMBLY
ASSEMBLY #60969
LIST 2 OF 2

NO REQ'D PART NO. DESCRIPTION

31 1 8564 Plate
32 1 58784 Chain Tightener Plate
33 1 53442 Spacer
34 1 59982 Spacer Plate
35 3 1096 .50" UNC X 3.00" Hex Capscrew

36 2 1516 .50" Flat Washer

37 2 1094 .50" UNC X 2.50" Hex Capscrew
38 1 60953 Inner Boom
39 1 1682 Snap Ring
40 1 59999 Sprocket

41 1 60001 Headshaft Assembly

42 1 61353 Chain Guard
43 5 1513 .31" Flat Washer
44 5 1021 .31" UNC X .75" Hex Capscrew
45 5 1502 .31" Lock Washer

46 4 1542 .50" UNC Nylock Nut

47 2 1769 .50" UNC X 1.00" Set Screw
48 2 1242 .50" UNC Jam Nut
49 1 53279 Boom Clamp
50 4 1984 .50" UNC X 5.50" Hex Capscrew - Grade 8

51 1 6616 Grease Zerk

6203
12-13-99-3
I I
TRENCHER ASSEMBLY
ASSEMBLY #60969

SERIAL #6GH394 AND UP

1
2
3
4

PART #78850 (WELDED TO

GEAR BOX HOUSING)

6251
11-8-93
I I
TRENCHER ASSEMBLY
ASSEMBLY #60969

SERIAL #6GH394 AND UP

NO REQ'D PART NO. DESCRIPTION

1 4 1021 .31" UNC X .75" Hex Capscrew

2 4 1502 .31" Lock Washer
3 4 1513 .31" Flat Washer
4 1 78852 Trencher PTO Guard

6252
11-8-93
I I
TRENCHER ASSEMBLY
GEAR BOX
ASSEMBLY #59994

2 4

5
6
7
27 8
5 10
3
11
12
13
9

15
14
17
16

25
13
12

26
24
20
23
22
21
20
19
18

6206
9-15-93
I I
TRENCHER ASSEMBLY
GEAR BOX
ASSEMBLY #59994

NO REQ'D PART NO. DESCRIPTION

1 1 7781 Vented Plug

2 1 59960 Input Shaft
3 1 59997 Gear Box Housing
4 1 8857 Sealer
5 2 59995 Bearing

6 1 62072 Spacer Tube

7 1 45203 O'Ring
8 1 45205 Seal
9 Varies 5334 Shim .002
Varies 5335 Shim .005
Varies 5336 Shim .010
10 1 5661 Key .31" sq. X 1.38"

11 1 5311 Input Gear

12 2 8627 1.00" Washer
13 2 1483 1.00" Hex Nut
14 1 59955 Gear Box Cover
15 6 1513 .31" Flat Washer

16 6 1502 .31" Lock Washer

17 6 1021 .31" UNC X .75" Hex Capscrew
18 1 59947 Output Shaft
19 1 1734 Snap Ring
20 2 59996 Bearing

21 1 45206 Seal
22 2 45204 O'Ring
23 1 62071 Seal Adapter Ring
24 Varies 7296 Shim .002
Varies 7297 Shim .005
Varies 7298 Shim .010
25 1 5662 Key .38" sq. X 1.38"

26 1 5319 Output Gear

27 1 3189 Oil Check Plug

6207
9-15-93
I I
VALVE ASSEMBLY
ASSEMBLY #2108
EFFECTIVE 1-1-95

4 7

3
7
8

9
8
10

6595
3-7-95
I I
VALVE ASSEMBLY
ASSEMBLY #2108
EFFECTIVE 1-1-95

NO REQ'D PART NO. DESCRIPTION

1 2 1007 .25" UNC X 2.00" Hex Capscrew

2 1 82660 Valve Mounting Plate
3 2 3430 90° Street Elbow
4 2 3457 Straight Adapter
5 1 62090 1-Spool Metro Valve

6 1 3434* 90° O'Ring Adapter

7 2 1501 .25" Lock Washer
8 2 1224 .25" UNC Hex Nut
9 2 3363 O'Ring Adapter
10 2 37174 Hose Assembly .25" X 26"
(SAE 100R2-2Wire) 6MP-6MP-HS

* NOTE: Part #3434 (90° O'Ring Adapter) is not required with John
Deere applications.

6596
3-7-95
I I
TRENCHER ASSEMBLY
CONTROL VALVE
ASSEMBLY #62090

3 7

2 RETURN

1 POWER 1

5
6

6684
11-9-95
I I
TRENCHER ASSEMBLY
CONTROL VALVE
ASSEMBLY #62090

NO REQ'D PART NO. DESCRIPTION

1 1 45235 Spool Seal Kit

2 1 45230 Spring Center Cover Assembly
3 1 45231 Power Beyond Plug Assembly
4 1 45236 Seal Kit
5 1 45232 Seal

6 1 45234 Plug Assembly

7 1 45233 Handle Assembly

6685
11-9-95
I I
VALVE ASSEMBLY
ASSEMBLY #2180

13

6 14
12
7 15

8 12

OUTLET
INLET
9
9
10
10

11
11

6186
8-30-93
I I
VALVE ASSEMBLY
ASSEMBLY #2180

NO REQ'D PART NO. DESCRIPTION

1 3 1023 .31" UNC X 1.25" Hex Capscrew

2 1 62087 Valve Mouting Plate
3 1 67801 Handle
4 1 45317 Lever Support Kit
5 1 61887 1-Spool Hidrover Valve

6 3 1524 .31" SAE Flat Washer

7 3 1502 .31" Lock Washer
8 3 1225 .31" UNC Hex Nut
9 2 3331 Straight Reducer 8MBo-6FP
10 2 3363 Straight Adaptor 6MP-6FP

11 2 37174 Hose Assembly .25" x 26"

(SAE 100R2-2Wire) 6MP-6MP-HS
12 2 3362 Straight Adaptor 10MBo-6MJ
13 1 45320 Power Beyond Sleeve
14 1 3336 Straight Adaptor 10MBo-4FP
15 1 3001 90° Elbow 6MJ-4MP

6187
8-30-93
I I
VALVE ASSEMBLY
JOHN DEERE 855 SERIAL NO. 820001 - UP
ASSEMBLY #2187

6 12
12
7

OUTLET
INLET 9

9
10
10
11
11

6188
8-30-93
I I
VALVE ASSEMBLY
JOHN DEERE 855 SERIAL NO. 820001 - UP
ASSEMBLY #2187

NO REQ'D PART NO. DESCRIPTION

1 3 1023 .31" UNC X 1.25" Hex Capscrew

2 1 62087 Valve Mouting Plate
3 1 67801 Handle
4 1 45317 Lever Support Kit
5 1 61887 1-Spool Hidrover Valve

6 3 1524 .31" SAE Flat Washer

7 3 1502 .31" Lock Washer
8 3 1225 .31" UNC Hex Nut
9 2 3331 Straight Reducer 8MBo-6FP
10 2 3363 Straight Adaptor 6MP-6FP

11 2 37174 Hose Assembly .25" x 26"

(SAE 100R2-2Wire) 6MP-6MP-HS
12 2 3362 Straight Adaptor 10MBo-6MJ

6189
8-30-93
 CYLINDER ASSEMBLY
ASSEMBLY #60964
10
9

8
7
6

5
4
3
2

15

14

13
12

11

6190
8-31-93
 CYLINDER ASSEMBLY
ASSEMBLY #60964

NO REQ'D PART NO. DESCRIPTION

1 1 60965 Cylinder Tube

2 1 7165* Gland Retainer Rod/Ring
3 1 1483 Hex Nut
4 1 4644* Teflon Piston Ring
5 1 4645* O'Ring

6 1 50252 Piston
7 1 4641* O'Ring
8 1 5421 Spacer Washer
9 1 4509* O'Ring
10 1 4510* Back-Up Washer

11 1 62770 Cylinder Gland

12 1 45219* Cylinder Rod Seal
13 1 4974* Rod Wiper
14 1 60967 Cylinder Rod
15 1 6616 Grease Zerk

NOTE: Seal Kit #45258 includes all parts marked with an asterisk (*). Parts
are not sold separately.

6191
8-31-93
I I
TRENCHER ASSEMBLY
PTO DRIVE ASSEMBLY #69217

1 2

6210
9-16-93
I I
TRENCHER ASSEMBLY
PTO DRIVE ASSEMBLY #69217

NO REQ'D PART NO. DESCRIPTION

1 1 70170 PTO Drive - Trencher Half Assembly

2 1 70169 PRO Drive - Tractor Half Assembly

6211
9-16-93
I I
TRENCHER ASSEMBLY
PTO DRIVE - TRENCHER HALF
ASSEMBLY #70170
1

4
7

8
5

10

6212
9-16-93
I I
TRENCHER ASSEMBLY
PTO DRIVE - TRENCHER HALF
ASSEMBLY #70170

NO REQ'D PART NO. DESCRIPTION

1 1 61684 Sleeve Profile

2 1 61690 Support Bearing
3 1 61689 Inner Shield Tube
4 1 61679 Safety Chain
5 1 62732 Screw

6 1 77368 Friction Clutch Assembly

7 1 4285 Decal
8 1 61687 Bearing Ring
9 1 61680 Cross & Bearing Kit
10 1 61686 Shield Cone

6213
9-16-93
I I
TRENCHER ASSEMBLY
PTO DRIVE - TRACTOR HALF
ASSEMBLY #70169

Quick-disconnect Compression Washer

1
pin spring

8
6

7 9

10

11

12
6214
9-16-93
I I
TRENCHER ASSEMBLY
PTO DRIVE - TRACTOR HALF
ASSEMBLY #70169

NO REQ'D PART NO. DESCRIPTION

1 1 69196 Yoke
2 -- 81179 Replacement Q.D. Pin Kit
3 1 61680 Cross & Bearing Kit
4 1 61681 Inboard Yoke
5 1 61686 Shield Cone

6 1 61682 Spring Pin

7 1 61679 Safety Chain
8 1 62732 Screw
9 1 61687 Bearing Ring
10 1 4586 Decal

11 1 61688 Outer Shield Tube

12 1 61683 Inner Profile

6215
9-16-93
I I
TRENCHER ASSEMBLY
PTO DRIVE - FRICTION CLUTCH
ASSEMBLY #77368

3 4 5

2
6

1
7

6216
9-16-93
I I
TRENCHER ASSEMBLY
PTO DRIVE - FRICTION CLUTCH
ASSEMBLY #77368

NO REQ'D PART NO. DESCRIPTION

1 1 61667 Clutch Housing

2 4 61651 Friction Disk
3 1 61664 Drive Plate
4 1 61665 Drive Plate
5 1 62736 Thrust Plate

6 4 2696 Hex Nut

7 1 61553* Belleville Spring (Dot Color - Red)
61654* Belleville Spring (Dot Color - White)
79439* Belleville Spring (Dot Color - Green)
8 1 69195 Hub

* When replacing Belleville Spring, replace with same dot color as existing
one.

6217
9-16-93
I I
TRENCHER ASSEMBLY
30" BOOM AND CRUMBER
ASSEMBLY #52992

2 4
5
6

6
5
4 8
3

9
10
4

13
14
12

15 4
11
CRUMBER SHOE
(PART OF CHAIN ASSEMBLY.
NOT INCLUDED IN BOOM &
CRUMBER ASEMBLY.)

16

13

17

5046
7-22-02-2
I I
TRENCHER ASSEMBLY
30" BOOM AND CRUMBER
ASSEMBLY #52992

NO REQ'D PART NO. DESCRIPTION

1 2 40161 Decal - Stand Clear

2 1 53070 30" Crumber Bar / Restraint Bar
3 2 1536 .38" UNC Nylock Nut
4 8 1514 .38" Flat Washer
5 4 53038 Crumber Roller

6 4 53039 Crumber Roller Bushing

7 2 1054 .38" UNC X 3.75" Hex Capscrew
8 1 53087 Crumber End
9 2 1226 .38" UNC Hex Nut
10 2 1503 .38" Lock Washer

11 2 1044 .38" UNC X 1.25" Hex Capscrew

12 1 53009 30" Boom
13 2 53115 30" Wear Strip
14 4 1087 .50" UNC X .75" Hex Capscrew
15 4 1505 .50" Lock Washer

16 1 53188 Spring
17 1 53138 Boom Bushing

5047
7-14-93-3
I I
TRENCHER ASSEMBLY
36" BOOM AND CRUMBER
ASSEMBLY #52993

2 4
5
6

6
5
4 8
3

9
10
4

13

12 4
11
14
CRUMBER SHOE
(PART OF CHAIN ASSEMBLY.
15 NOT INCLUDED IN BOOM &
CRUMBER ASEMBLY.)

16

13

17

5048
7-22-02-2
I I
TRENCHER ASSEMBLY
36" BOOM AND CRUMBER
ASSEMBLY #52993

NO REQ'D PART NO. DESCRIPTION

1 2 40161 Decal - Stand Clear

2 1 53069 36" Crumber Bar / Restraint Bar
3 2 1536 .38" UNC Nylock Nut
4 8 1514 .38" Flat Washer
5 4 53038 Crumber Roller

6 4 53039 Crumber Roller Bushing

7 2 1054 .38" UNC X 3.75" Hex Capscrew
8 1 53087 Crumber End
9 2 1226 .38" UNC Hex Nut
10 2 1503 .38" Lock Washer

11 2 1044 .38" UNC X 1.25" Hex Capscrew

12 1 53010 36" Boom
13 2 53116 36" Wear Strip
14 4 1087 .50" UNC X .75" Hex Capscrew
15 4 1505 .50" Lock Washer

16 1 53188 Spring
17 1 53138 Boom Bushing

5049
7-14-93-3
I I
TRENCHER ASSEMBLY
48" BOOM AND CRUMBER
ASSEMBLY #69832

2
7
4
5
6

6
5
4 8
3

9
10
4

13 4
11
19
18 24 CRUMBER SHOE
12 (PART OF CHAIN ASSEMBLY.
21 14 NOT INCLUDED IN BOOM &
24
CRUMBER ASEMBLY.)
21 15
20 22
23
15

23 15 22

13 16

17

5050
9-16-04-3
I I
TRENCHER ASSEMBLY
48" BOOM AND CRUMBER
ASSEMBLY #69832

NO REQ'D PART NO. DESCRIPTION

1 2 40161 Decal - Stand Clear

2 1 53068 48" Crumber Bar / Restraint Bar
3 2 1536 .38" UNC Nylock Nut
4 8 1514 .38" Flat Washer
5 4 53038 Crumber Roller

6 4 53039 Crumber Roller Bushing

7 2 1054 .38" UNC X 3.75" Hex Capscrew
8 1 53087 Crumber End
9 2 1226 .38" UNC Hex Nut
10 2 1503 .38" Lock Washer

11 2 1044 .38" UNC X 1.25" Hex Capscrew

12 1 53011 48" Boom
13 2 53117 48" Wear Strip
14 6 1087 .50" UNC X .75" Hex Capscrew
15 8 1505 .50" Lock Washer

16 1 53188 Spring
17 1 53138 Boom Bushing
18 2 56417 Guide Tube
19 2 1981 .50" UNC X 6.50" Hex Capscrew GR 8
20 2 1231 .75" UNC Hex Nut

21 2 1980 .50" UNC X 6.00" Hex Capscrew GR 8

22 2 56416 Adjusting Stud
23 4 1228 .50" UNC Hex Nut
24 4 1646 .50" Flat Hard Washer

5051
9-16-04-3
I I
TRENCHER ASSEMBLY
60" BOOM AND CRUMBER
ASSEMBLY #69833

2
7
4
5
6

6
5
4 8
3

9
10
4
13

4
19 11
18 CRUMBER SHOE
24 12 (PART OF CHAIN ASSEMBLY.
21 NOT INCLUDED IN BOOM &
24 14 CRUMBER ASSEMBLY.)

22 15
20
23
15

23 22

13

16

17

5052
9-16-04-3
I I
TRENCHER ASSEMBLY
60" BOOM AND CRUMBER
ASSEMBLY #69833

NO REQ'D PART NO. DESCRIPTION

1 2 40161 Decal - Stand Clear

2 1 53067 48" Crumber Bar / Restraint Bar
3 2 1536 .38" UNC Nylock Nut
4 8 1514 .38" Flat Washer
5 4 53038 Crumber Roller

6 4 53039 Crumber Roller Bushing

7 2 1054 .38" UNC X 3.75" Hex Capscrew
8 1 53087 Crumber End
9 2 1226 .38" UNC Hex Nut
10 2 1503 .38" Lock Washer

11 2 1044 .38" UNC X 1.25" Hex Capscrew

12 1 53012 60" Boom
13 2 53118 60" Wear Strip
14 8 1087 .50" UNC X .75" Hex Capscrew
15 10 1505 .50" Lock Washer

16 1 53188 Spring
17 1 53138 Boom Bushing
18 2 56417 Guide Tube
19 2 1981 .50" UNC X 6.50" Hex Capscrew GR 8
20 2 1231 .75" UNC Hex Nut

21 2 1980 .50" UNC X 6.00" Hex Capscrew GR 8

22 2 56416 Adjusting Stud
23 4 1228 .50" UNC Hex Nut
24 4 1646 .50" Flat Hard Washer

5053
9-16-04-4
I I
TRENCHER ASSEMBLY
HEADSHAFT CARTRIDGE
ASSEMBLY #60001

1
2
3
4
5
6
7

10

11
12
13
14
15
16

6204
8-2-02-2
I I
TRENCHER ASSEMBLY
HEADSHAFT CARTRIDGE
ASSEMBLY #60001

NO REQ'D PART NO. DESCRIPTION

1 1 45185 Seal
2 4 1730 Set Screw
3 1 58997 Locking Collar
4 1 1681 Snap Ring
5 VARIES 51737 Metal Shim (2.88" x 3.50" x .002" Thick)
VARIES 51738 Metal Shim (2.88" x 3.50" x .005" Thick)
VARIES 51739 Metal Shim (2.88" x 3.50" x .010" Thick)

6 2 51718 Bearing
7 2 3226 Pipe Plug
8 1 59961 Headshaft Housing
9 1 59946 Headshaft
10 1 50484 Inner Race

11 1 50483 Bearing
12 1 45087 Seal
13 1 60404 Spacer Tube
14 1 45085 O-Ring
15 6 1575 Set Screw

16 1 53220 Cap

6205
8-2-02-2
I I
TRENCHER ASSEMBLY
2.00" PITCH SPROCKET & BOOM END SET
ASSEMBLY #69768

1
2

6
5

8
11

10

9
8

5056
7-23-02-3
I I
TRENCHER ASSEMBLY
2.00" PITCH SPROCKET & BOOM END SET
ASSEMBLY #69768

NO REQ'D PART NO. DESCRIPTION

1 2 1230 .62" UNC Hex Nut

2 2 1506 .62" Lock Washer
3 2 1118 .62" UNC X 2.50" Hex Capscrew
4 1 53975 12 Tooth Drive Sprocket - 2.00" Pitch
5 1 80032 Boom End

6 1 1548 .75" UNC X 1.25" Nylock Capscrew

7 1 53132 1.12" Square Pin
8 2 54067 Idler Spacer
9 1 53988 Idler Bearing Hub
10 1 8085 Idler Bearing

11 1 79106 (1) Idler Wheel

NOTES:

(1) Idler Wheel #79103 replaces Idler Wheel #62718. Effective 6/19/92.

5057
7-14-93-3
I I
TRENCHER ASSEMBLY
20" AUGER
ASSEMBLY #59000

5066
7-23-02-2
I I
TRENCHER ASSEMBLY
20" AUGER
ASSEMBLY #59000

NO REQ'D PART NO. DESCRIPTION

1 1 59001 Auger
2 3 1095 .50" UNC X 2.75" Hex Capscrew
3 3 1505 .50" Lock Washer
4 3 1228 .50" UNC Hex Nut

5067
7-23-02-2
I I
TRENCHER ASSEMBLY
SPOIL AUGER - PADDLE
ASSEMBLY #52923

6253
11-8-93
I I
TRENCHER ASSEMBLY
SPOIL AUGER - PADDLE
ASSEMBLY #52923

NO REQ'D PART NO. DESCRIPTION

1 2 53108 18" Auger

2 1 53109 14" Auger
3 6 1094 .50" UNC X 2.50" Hex Capscrew
4 6 1505 .50" Lock Washer
5 6 1228 .50" UNC Hex Nut

6254
11-8-93
I I
TRENCHER ASSEMBLY
OUTBOARD BEARING KIT
ASSEMBLY #63388

3
2
8
7
6

10

11

2
3

5062
7-23-02-3
I I
TRENCHER ASSEMBLY
OUTBOARD BEARING KIT
ASSEMBLY #63388

NO REQ'D PART NO. DESCRIPTION

1 2 1090 .50" UNC X 1.50" Hex Capscrew

2 9 1505 .50" Lock Washer
3 9 1228 .50" UNC Hex Nut
4 1 63649 Extension Tube
5 1 62408 Tee Clamp

6 3 1094 .50" UNC X 2.50" Hex Capscrew

7 1 62403 Arm
8 1 62406 Shaft
9 4 1092 .50" UNC X 2.00" Hex Capscrew
10 1 62308 Bearing

11 1 62415 Bearing Cap

5063
7-23-02-2
 COMBINATION ROCK AND FROST CHAIN
2.00" PITCH - TOOTH EVERY STATION
SERVICE PARTS

STATION #1 STATION #2 STATION #3

11 11 3
1 2
12 12 13

10 15 15 10
10 15

STATION #4 STATION #5 STATION #6

11 11
4 2 1
13 14 14
10

15
10 16 16 10

STATION #7 STATION #8 STATION #9

3 4 11
6 5
13
13 14

10 10 10 17
15 15

STATION #10 STATION #11 STATION #12

4 3 11 4 3
8 7 14
14 14

10 19
10 18 10
17
9 9

6824
1-26-96
 COMBINATION ROCK AND FROST CHAIN
2.00" PITCH - TOOTH EVERY STATION
SERVICE PARTS

NO PART NO. DESCRIPTION

1 83802 Carbide Bit Holder - 4" Right

2 83801 Carbide Bit Holder - 4" Left

3 54432 Cup Cutter - Right

4 54431 Cup Cutter - Left

5 83804 Carbide Bit Holder - 5" Right

(1) Weld Spot on Top for Identifying Purposes
6 83803 Carbide Bit Holder - 5" Left
(1) Weld Spot on Top for Identifying Purposes

7 83806 Carbide Bit Holder - 6" Right

(2) Weld Spots on Top for Identifying Purposes
8 83805 Carbide Bit Holder - 6" Left
(2) Weld Spots on Top for Identifying Purposes

9 83800 Spacer - 6" Cut

10 1692 .50" UNF Hex Nut

11 51547 Carbide Bit

12 83798 Tube Spacer
(Inside Mount Carbide Bit Holder)

13 54628 Tube Spacer

(Inside Mount Cup Cutter)
14 54440 Tube Spacer
(Outside Cup or Carbide Bit Holder)

15 1347 .50" UNF X 3.25" Hex Capscrew

16 1349 .50" UNF X 3.75" Hex Capscrew

17 1351 .50" UNF X 4.50" Hex Capscrew

18 1348 .50" UNF X 3.50" Hex Capscrew

19 1350 .50" UNF X 4.00" Hex Capscrew

NOTE: There are weld spots located on the top of the 5" and 6" Carbide
Bit Holders to assist in parts identification. One weld spot on the 5" Hold-
ers and two weld spots on the 6" Holders.

6825
1-26-96
J J
DIGGING CHAIN OPTIONS
2.00" PITCH DIGGING CHAIN ASSEMBLIES

GENERAL INFORMATION

This page contains a listing of all of the 2.00" pitch digging chain
assemblies offered for your trencher. Each chain assembly comes with all
necessary teeth and spacers already installed. Just thread the chain onto
the trencher and fasten the two ends together with the pin and keeper pin
included in the assembly. A crumber shoe of the appropriate width is also
included in the chain assembly.

Before you order a new chain, be sure to check for compatibility with
corresponding components. You may need to order more than just a chain
assembly. You must use a digging boom of the same digging depth as the
chain. The crumber bar must also be of the same digging depth. The
digging sprocket must also be of the same pitch as the chain. All of these
components must match for the trencher to function properly.

Bare 2.00" pitch digging chain (without teeth, spacers, or hardware)

can be ordered in any desired length under the part number 79018. Just
use this number and then specify the length desired in pitches (example, 52
pitches of chain would be needed for a 36" boom).

2.00" PITCH DIGGING CHAIN ASSEMBLIES

Complete chain assemblies. Includes chain with all teeth
and spacers attached. Also includes appropriate width crumber
shoe.
CHAIN ASSEMBLIES WITH A TOOTH EVERY STATION
DESCRIPTION LENGTH OF CHAIN TENSILE PART
(boom used X trench width) (in 2.00" pitches) STRENGTH NO.

For 30" Boom 6" Wide 48 Pitch 50,000# 80044

For 30" Boom 8" Wide 46 Pitch 50,000# 80045
For 30" Boom 10" Wide 46 Pitch 50,000# 80046
For 30" Boom 12" Wide 46 Pitch 50,000# 80047

For 36" Boom 6" Wide 52 Pitch 50,000# 80048

For 36" Boom 8" Wide 52 Pitch 50,000# 80049
For 36" Boom 10" Wide 52 Pitch 50,000# 80050

For 48" Boom 6" Wide 66 Pitch 50,000# 80051

For 48" Boom 8" Wide 66 Pitch 50,000# 80052

For 60" Boom 6" Wide 80 Pitch 50,000# 80053

5878
10-10-00-2
J J
DIGGING CHAIN OPTIONS
2.00" PITCH DIGGING CHAIN ASSEMBLIES

2.00" PITCH DIGGING CHAIN ASSEMBLIES

Complete chain assemblies. Includes chain with all teeth
and spacers attached. Also includes appropriate width crumber
shoe.
CHAIN ASSEMBLIES WITH A TOOTH EVERY OTHER STATION
DESCRIPTION LENGTH OF CHAIN TENSILE PART
(boom used X trench width) (in 2.00" pitches) STRENGTH NO.

For 30" Boom 6" Wide 46 Pitch 50,000# 80034

For 30" Boom 8" Wide 46 Pitch 50,000# 80035
For 30" Boom 10" Wide 46 Pitch 50,000# 80036
For 30" Boom 12" Wide 46 Pitch 50,000# 80037

For 36" Boom 6" Wide 52 Pitch 50,000# 80038

For 36" Boom 8" Wide 52 Pitch 50,000# 80039
For 36" Boom 10" Wide 52 Pitch 50,000# 80040

For 48" Boom 6" Wide 66 Pitch 50,000# 80041

For 48" Boom 8" Wide 66 Pitch 50,000# 80042

For 60" Boom 6" Wide 80 Pitch 50,000# 80043

5879
10-10-00-2
J J
DIGGING CHAIN OPTIONS
2.00" PITCH CHAIN REPLACEMENT PARTS

GENERAL INFORMATION
You can purchase individual chain links and pins for your trencher.
These can be used to repair a damaged chain, or lengthen and modify an
existing chain. Below is a diagram of the chain’s basic components with
their descriptions and corresponding part numbers. Use these numbers
when ordering. You can also order a complete bare chain (without teeth
and spacers) in any length desired. The chain is ordered under part number
79018 for 2.00" Pitch. Just specify the length you want in pitches. (See
“2.00” PITCH DIGGING CHAIN ASSEMBLIES” chart located in this section.)
When pinning links of chain together, first tap the pin through the
connector link with the perfectly round holes and then on through the inner
link. Place the second connector link in position, you will note that the end
of the pin has one side flattened. Rotate the pin until its flat side lines up
with the corresponding flat side of the connector link hole and tap the pin
on through. Place the chain keeper pin into the hole at the end of the main
pin and tap down tight. Finally, bend the end of the keeper pin over to
secure it in place.

NO. REQ’D PART NO. DESCRIPTION

1 Varies 54757 Inner Link

2 Varies 54731 Pin
3 Varies 54732 Chain Keeper Pin
4 Varies 54730 Connector Link includes (2) Pins #54731 and (2)
Chain Keeper Pins #54732
5806
10-4-95
J J
DIGGING CHAIN OPTIONS
2.00" PITCH DIGGING TOOTH STATION SEQUENCE

GENERAL INFORMATION
Every second link on a digging chain is a special link called a digging
station. These digging station links are designed so that digging teeth can be
bolted onto them in a variety of configurations. It is the number and the make up
of these different digging stations that make each chain unique.
The following tables show the number of digging stations there are in
each available 2.00" pitch digging chain. The digging tooth make up of each
digging station is given in code. The key to the code is located at the below.
Thus these charts will tell you what kind of digging tooth arrangement is at each
digging station on each digging chain assembly. The actual parts break down
on each digging tooth arrangement is shown on the "Digging Tooth Station
Break Down" diagrams located in this section following the charts.

DIGGING TOOTH STATION KEY

CR - CENTER CUTTER, RIGHT 6R - 6" RIGHT STATION 8R - 8" RIGHT STATION
CL - CENTER CUTTER, LEFT 6L - 6" LEFT STATION 8L - 8" LEFT STATION

10 - 10" STATION 12 - 12" STATION B - BLANK STATION

TOOTH EVERY STATION

TRENCH 30" BOOM

WIDTH DIGGING TOOTH STATIONS

TRENCH 36" BOOM

WIDTH DIGGING TOOTH STATIONS

TRENCH 48" BOOM

WIDTH DIGGING TOOTH STATIONS

5880
7-25-02-2
J J
DIGGING CHAIN OPTIONS
2.00" PITCH DIGGING TOOTH STATION SEQUENCE

TOOTH EVERY STATION

TRENCH 60" BOOM

WIDTH DIGGING TOOTH STATIONS

TOOTH EVERY OTHER STATION

TRENCH 30" BOOM

WIDTH DIGGING TOOTH STATIONS

36" BOOM
TRENCH DIGGING TOOTH STATIONS
WIDTH

TRENCH 48" BOOM

WIDTH DIGGING TOOTH STATIONS

TRENCH 60" BOOM

WIDTH DIGGING TOOTH STATIONS

5881
7-25-02-2
J J
DIGGING CHAIN OPTIONS
2.00" PITCH DIGGING TOOTH STATION BREAK DOWN

GENERAL INFORMATION

The following diagrams are the complete parts break downs of all the
different digging tooth arrangements used on the digging stations for 2.00" pitch
chains. The diagrams are frontal views according to the digging chain direction
of travel. All 2.00" pitch chains are made up of a combination of some or all of
these various digging tooth arrangements. See the "2.00" Pitch Digging Tooth
Station Sequence Charts" (located earlier in this section) to find out how the
arrangements are used for the various digging chains.

DIRT TOOTH, LEFT

PART #54431

DIRT TOOTH, RIGHT

PART #54432

1.56" SPACER TUBE

PART #54628

3.25" CAPSCREW
PART #1347
WITH NUT #1692

CENTER CUTTER, LEFT CENTER CUTTER, RIGHT

DIRT TOOTH, LEFT
PART #54431

DIRT TOOTH, RIGHT

PART #54432

1.81" SPACER TUBE

PART #54440

3.25" CAPSCREW
PART #1347
WITH NUT #1692

5809
6" LEFT STATION 6" RIGHT STATION 3-2-92
J J
DIGGING CHAIN OPTIONS
2.00" PITCH DIGGING TOOTH STATION BREAK DOWN

DIRT TOOTH, LEFT

PART #54431

DIRT TOOTH, RIGHT

PART #54432

SPACER BAR
PART #54439

1.81" SPACER TUBE

PART #54440

4.50" CAPSCREW
PART #1351
WITH NUT #1692

8" LEFT STATION 8" RIGHT STATION

DIRT TOOTH, LEFT

PART #54431

DIRT TOOTH, RIGHT

PART #54432

10" CHAIN SPACER

PART #54441

3.25" CAPSCREW
PART #1347
WITH NUT #1692

6.50
10" STATION 5810
3-2-92
J J
DIGGING CHAIN OPTIONS
2.00" PITCH DIGGING TOOTH STATION BREAK DOWN

DIRT TOOTH, LEFT

PART #54431

DIRT TOOTH, RIGHT

PART #54432

12" CHAIN SPACER

PART #54442

4.50" CAPSCREW
PART #1351
WITH FLAT WASHER #1527
AND NUT #1692

8.50
12" STATION

5811
3-2-92
J J
DIGGING CHAIN OPTIONS
2.00" PITCH DIGGING CHAIN WIDTH CONVERSIONS

GENERAL INFORMATION

Digging chains can be modified to dig trenches in a variety of widths. By modifying an

existing chain, it can be used to dig the width you want and thus save going the expense of a whole
new digging chain assembly. This can be a considerable cost savings, however it is more work
than just installing a new digging chain assembly.

The information given below is a complete listing of all the possible chain width conversions
for 2.00" pitch chain for your trencher. Included in the listing is a break down of all the parts
(including part numbers and quantities) needed to make the conversion. Simply install the new
parts (and rearrange the old parts) so that the finished chain construction follows that described
in the “Digging Tooth Station Sequence” chart and the “Digging Tooth Station Break Down”
diagrams for 2.00" pitch chain (located elsewhere in this section).

It should be noted that this information only applies to modifying chains of the same length
and pitch. All components must be of the same pitch. You cannot intermix components of different
pitch.

CHAIN CONVERSIONS FOR 30" BOOMS - TOOTH EVERY STATION

1) FROM 6" WIDE TO 8" WIDE

REQ’D PART NO. DESCRIPTION

20 1351 .50"UNF X 4.50" Capscrew

2 54440 Spacer Tube
10 54439 8" Spacer
1 53055 8" Crumber Shoe

2) FROM 8" WIDE TO 6" WIDE

REQ’D PART NO. DESCRIPTION

20 1347 .50"UNF X 3.25" Capscrew

2 54628 Spacer Tube
1 53054 6" Crumber Shoe

5812
3-3-92
J J
DIGGING CHAIN OPTIONS
2.00" PITCH DIGGING CHAIN WIDTH CONVERSIONS

3) FROM 6" WIDE TO 10" WIDE

REQ'D PART NO. DESCRIPTION

8 1692 .50" UNF High Hex Nut
16 1351 .50"UNF X 4.50" Capscrew
2 54431 Left Tooth
2 54432 Right Tooth
4 54441 10" Chain Spacer
1 53058 10" Crumber Shoe
8 54439 8" Spacer

4) FROM 10" WIDE TO 6" WIDE

REQ'D PART NO. DESCRIPTION

8 1347 .50"UNF X 3.25" Capscrew
4 54628 Spacer Tube
4 54440 Spacer Tube
1 53054 6" Crumber Shoe

5) FROM 6" WIDE TO 12" WIDE

REQ'D PART NO. DESCRIPTION

12 1692 .50" UNF High Hex Nut
26 1351 .50"UNF X 4.50" Capscrew
12 1527 .50" SAE Flat Washer
3 54431 Left Tooth
3 54432 Right Tooth
3 54441 10" Chain Spacer
3 54442 12" Chain Spacer
1 53059 12" Crumber Shoe
7 54439 8" Spacer

6) FROM 12" WIDE TO 6" WIDE

REQ'D PART NO. DESCRIPTION

14 1347 .50"UNF X 3.25" Capscrew
4 54628 Spacer Tube
8 54440 Spacer Tube
1 53054 6" Crumber Shoe

5882
8-13-92
J J
DIGGING CHAIN OPTIONS
2.00" PITCH DIGGING CHAIN WIDTH CONVERSIONS

7) FROM 8" WIDE TO 10" WIDE

REQ'D PART NO. DESCRIPTION

8 1692 .50" UNF High Hex Nut
12 1347 .50"UNF X 3.25" Capscrew
2 54431 Left Tooth
2 54432 Right Tooth
4 54441 10" Chain Spacer
1 53058 10" Crumber Shoe

8) FROM 10" WIDE TO 8" WIDE

REQ'D PART NO. DESCRIPTION

4 1351 .50"UNF X 4.50" Capscrew
2 54628 Spacer Tube
6 54440 Spacer Tube
2 54439 8" Spacer
1 53055 8" Crumber Shoe

9) FROM 8" WIDE TO 12" WIDE

REQ'D PART NO. DESCRIPTION

12 1692 .50" UNF High Hex Nut
6 1347 .50"UNF X 3.25" Capscrew
6 1351 .50"UNF X 4.50" Capscrew
12 1527 .50" SAE Flat Washer
3 54431 Left Tooth
3 54432 Right Tooth
3 54441 10" Chain Spacer
3 54442 12" Chain Spacer
1 53059 12" Crumber Shoe

10) FROM 12" WIDE TO 8" WIDE

REQ'D PART NO. DESCRIPTION

2 54628 Spacer Tube

10 54440 Spacer Tube
3 54439 8" Spacer
1 53055 8" Crumber Shoe

5883
8-13-92
J J
DIGGING CHAIN OPTIONS
2.00" PITCH DIGGING CHAIN WIDTH CONVERSIONS

11) FROM 10" WIDE TO 12" WIDE

REQ'D PART NO. DESCRIPTION

4 1692 .50" UNF High Hex Nut
10 1351 .50"UNF X 4.50" Capscrew
12 1527 .50" SAE Flat Washer
1 54431 Left Tooth
1 54432 Right Tooth
3 54442 12" Chain Spacer
1 53059 12" Crumber Shoe

12) FROM 12" WIDE TO 10" WIDE

REQ'D PART NO. DESCRIPTION

6 1347 .50"UNF X 3.25" Capscrew
4 54440 Spacer Tube
1 54441 10" Chain Spacer
1 53058 10" Crumber Shoe

CHAIN CONVERSIONS FOR 36" BOOMS - TOOTH EVERY STATION

1) FROM 6" WIDE TO 8" WIDE

REQ'D PART NO. DESCRIPTION

20 1351 .50"UNF X 4.50" Capscrew
2 54440 Spacer Tube
10 54439 8" Spacer
1 53055 8" Crumber Shoe

2) FROM 8" WIDE TO 6" WIDE

REQ'D PART NO. DESCRIPTION

20 1347 .50"UNF X 3.25" Capscrew
2 54628 Spacer Tube
1 53054 6" Crumber Shoe

5884
8-13-92
J J
DIGGING CHAIN OPTIONS
2.00" PITCH DIGGING CHAIN WIDTH CONVERSIONS

3) FROM 6" WIDE TO 10" WIDE

REQ'D PART NO. DESCRIPTION

8 1692 .50" UNF High Hex Nut
18 1351 .50"UNF X 4.50" Capscrew
2 54431 Left Tooth
2 54432 Right Tooth
4 54441 10" Chain Spacer
1 53058 10" Crumber Shoe
9 54439 8" Spacer

4) FROM 10" WIDE TO 6" WIDE

REQ'D PART NO. DESCRIPTION

10 1347 .50"UNF X 3.25" Capscrew
2 54628 Spacer Tube
6 54440 Spacer Tube
1 53054 6" Crumber Shoe

5) FROM 8" WIDE TO 10" WIDE

REQ'D PART NO. DESCRIPTION

8 1692 .50" UNF High Hex Nut
10 1347 .50"UNF X 3.25" Capscrew
2 54431 Left Tooth
2 54432 Right Tooth
4 54441 10" Chain Spacer
1 53058 10" Crumber Shoe

6) FROM 10" WIDE TO 8" WIDE

REQ'D PART NO. DESCRIPTION

2 1351 .50"UNF X 4.50" Capscrew
8 54440 Spacer Tube
1 54439 8" Spacer
1 53055 8" Crumber Shoe

5885
8-13-92
J J
DIGGING CHAIN OPTIONS
2.00" PITCH DIGGING CHAIN WIDTH CONVERSIONS

CHAIN CONVERSIONS FOR 48" BOOMS - TOOTH EVERY STATION

1) FROM 6" WIDE TO 8" WIDE

REQ’D PART NO. DESCRIPTION

28 1351 .50"UNF X 4.50" Capscrew

2 54440 Spacer Tube
14 54439 8" Spacer
1 53055 8" Crumber Shoe

2) FROM 8" WIDE TO 6" WIDE

REQ’D PART NO. DESCRIPTION

28 1347 .50"UNF X 3.25" Capscrew

2 54628 Spacer Tube
1 53054 6" Crumber Shoe

CHAIN CONVERSIONS FOR 30" BOOMS - TOOTH EVERY OTHER STATION

1) FROM 6" WIDE TO 8" WIDE

REQ’D PART NO. DESCRIPTION

8 1351 .50"UNF X 4.50" Capscrew

4 54439 8" Spacer
1 53055 8" Crumber Shoe

2) FROM 8" WIDE TO 6" WIDE

REQ’D PART NO. DESCRIPTION

8 1347 .50"UNF X 3.25" Capscrew

1 53054 6" Crumber Shoe

3) FROM 6" WIDE TO 10" WIDE

REQ’D PART NO. DESCRIPTION

4 1692 .50" UNF High Hex Nut

8 1351 .50"UNF X 4.50" Capscrew
1 54431 Left Tooth
1 54432 Right Tooth
2 54441 10" Chain Spacer
1 53058 10" Crumber Shoe
4 54439 8" Spacer 5817
3-3-92
J J
DIGGING CHAIN OPTIONS
2.00" PITCH DIGGING CHAIN WIDTH CONVERSIONS

4) FROM 10" WIDE TO 6" WIDE

REQ’D PART NO. DESCRIPTION

4 1347 .50"UNF X 3.25" Capscrew

2 54628 Spacer Tube
2 54440 Spacer Tube
1 53054 6" Crumber Shoe

5) FROM 6" WIDE TO 12" WIDE

REQ’D PART NO. DESCRIPTION

8 1692 .50" UNF High Hex Nut

16 1351 .50"UNF X 4.50" Capscrew
8 1527 .50" SAE Flat Washer
2 54431 Left Tooth
2 54432 Right Tooth
2 54441 10" Chain Spacer
2 54442 12" Chain Spacer
1 53059 12" Crumber Shoe
4 54439 8" Spacer

6) FROM 12" WIDE TO 6" WIDE

REQ’D PART NO. DESCRIPTION

8 1347 .50"UNF X 3.25" Capscrew

2 54628 Spacer Tube
6 54440 Spacer Tube
1 53054 6" Crumber Shoe

7) FROM 8" WIDE TO 10" WIDE

REQ’D PART NO. DESCRIPTION

4 1692 .50" UNF High Hex Nut

4 1347 .50"UNF X 3.25" Capscrew
1 54431 Left Tooth
1 54432 Right Tooth
2 54441 10" Chain Spacer
1 53058 10" Crumber Shoe

5818
3-3-92
J J
DIGGING CHAIN OPTIONS
2.00" PITCH DIGGING CHAIN WIDTH CONVERSIONS

8) FROM 10" WIDE TO 8" WIDE

REQ’D PART NO. DESCRIPTION

2 54628 Spacer Tube

2 54440 Spacer Tube
1 53055 8" Crumber Shoe

9) FROM 8" WIDE TO 12" WIDE

REQ’D PART NO. DESCRIPTION

8 1692 .50" UNF High Hex Nut

8 1351 .50"UNF X 4.50" Capscrew
8 1527 .50" SAE Flat Washer
2 54431 Left Tooth
2 54432 Right Tooth
2 54441 10" Chain Spacer
2 54442 12" Chain Spacer
1 53059 12" Crumber Shoe

10) FROM 12" WIDE TO 8" WIDE

REQ’D PART NO. DESCRIPTION

2 54628 Spacer Tube

6 54440 Spacer Tube
1 53055 8" Crumber Shoe

11) FROM 10" WIDE TO 12" WIDE

REQ’D PART NO. DESCRIPTION

4 1692 .50" UNF High Hex Nut

8 1351 .50"UNF X 4.50" Capscrew
8 1527 .50" SAE Flat Washer
1 54431 Left Tooth
1 54432 Right Tooth
2 54442 12" Chain Spacer
1 53059 12" Crumber Shoe

5819
3-3-92
J J
DIGGING CHAIN OPTIONS
2.00" PITCH DIGGING CHAIN WIDTH CONVERSIONS

12) FROM 12" WIDE TO 10" WIDE

REQ'D PART NO. DESCRIPTION

4 1347 .50"UNF X 3.25" Capscrew
4 54440 Spacer Tube
1 53058 10" Crumber Shoe

CHAIN CONVERSIONS FOR 36" BOOMS - TOOTH EVERY OTHER STATION

1) FROM 6" WIDE TO 8" WIDE

REQ'D PART NO. DESCRIPTION

10 1351 .50"UNF X 4.50" Capscrew
5 54439 8" Spacer
1 53055 8" Crumber Shoe

2) FROM 8" WIDE TO 6" WIDE

REQ'D PART NO. DESCRIPTION

10 1347 .50"UNF X 3.25" Capscrew
1 53054 6" Crumber Shoe

3) FROM 6" WIDE TO 10" WIDE

REQ'D PART NO. DESCRIPTION

4 1692 .50" UNF High Hex Nut
8 1351 .50"UNF X 4.50" Capscrew
1 54431 Left Tooth
2 54441 10" Chain Spacer
1 53058 10" Crumber Shoe
4 54439 8" Spacer

4) FROM 10" WIDE TO 6" WIDE

REQ'D PART NO. DESCRIPTION

4 1347 .50"UNF X 3.25" Capscrew
4 54440 Spacer Tube
1 53054 6" Crumber Shoe

5886
8-13-92
J J
DIGGING CHAIN OPTIONS
2.00" PITCH DIGGING CHAIN WIDTH CONVERSIONS

5) FROM 8" WIDE TO 10" WIDE

REQ'D PART NO. DESCRIPTION

4 1692 .50" UNF High Hex Nut
6 1347 .50"UNF X 3.25" Capscrew
2 54431 Left Tooth
2 54441 10" Chain Spacer
1 53058 10" Crumber Shoe

6) FROM 10" WIDE TO 8" WIDE

REQ'D PART NO. DESCRIPTION

2 1351 .50"UNF X 4.50" Capscrew
4 54440 Spacer Tube
1 54439 8" Spacer
1 53055 8" Crumber Shoe

CHAIN CONVERSIONS FOR 48" BOOMS - TOOTH EVERY OTHER STATION

1) FROM 6" WIDE TO 8" WIDE

REQ'D PART NO. DESCRIPTION

14 1351 .50"UNF X 4.50" Capscrew
2 54440 Spacer Tube
7 54439 8" Spacer
1 53055 8" Crumber Shoe

2) FROM 8" WIDE TO 6" WIDE

REQ'D PART NO. DESCRIPTION

14 1347 .50"UNF X 3.25" Capscrew
2 54628 Spacer Tube
1 53054 6" Crumber Shoe

5887
8-13-92
L L
MAINTENANCE

GENERAL INFORMATION

Regular maintenance is the key to long equipment life and safe operation.
Maintenance requirements have been reduced to an absolute minimum. How-
ever, it is very important that these maintenance functions be performed as
described below.

CAUTION! Always choose level and hard ground to park the tractor on
and set the brake so that the tractor cannot roll. Never per-
form maintenance on the trencher when the tractor engine is
running.

The main part of the maintenance procedure is proper lubrication. This

information is covered in detail in Section "H". Be sure to follow the recom-
mended lubrication time intervals. This is crucial to your trencher's longevity.

Trenchers are subject to extreme vibration due to their very nature. Be

sure to check the trencher and its mounting daily for loose bolts and hardware.
Tighten according to the bolt torque specification charts found in Section "O".

THE HYDRAULIC SYSTEM

WARNING! Escaping fluid under pressure can have sufficient force to

penetrate the skin causing serious personal injury. Fluid es-
caping from a very small hole can be almost invisible. Use a
piece of cardboard or wood, rather than hands to search for
suspected leaks.

Keep unprotected body parts, such as face, eyes, and arms as

far away as possible from a suspected leak. Flesh injected
with hydraulic fluid may develop gangrene or other permanent
disabilities.

If injured by injected fluid, see a doctor at once. If your doctor

is not familiar with this type of injury, ask him to research
immediately to determine proper treatment.

The most common cause of premature wear and malfunctioning of hy-

draulic system components is the ingress of contaminants, incorrect pressure
and pump cavitation.

6218
9-17-93
L L
MAINTENANCE

Observe a high standard of cleanliness when doing valve or cylinder

maintenance. During maintenance cover or plug ends of disconnected hydraulic
lines to prevent contaminants from entering. Use clean oil and a clean container
when adding oil for hydraulic purposes. Use the tractor manufacturer's recom-
mended hydraulic oil.

Refer to your hydraulic hose circuit if in doubt about the correct connec-
tion.

DIGGING CHAIN REMOVAL

1. To remove digging chain, position trencher boom in transport position and

install jack stands under trencher mainframe to achieve ground clearance
and to support trencher.

2. Remove crumber assembly by loosening two jam nuts and set screws.
Pull the crumber bar / personal restraint bar out of its support tube. See
Figure #1

FIGURE #1
SET SCREW

LOOSEN JAM NUTS AND SET

SCREWS TO REMOVE
CRUMBER BOOM
MAINFRAME CRUMBER
BOOM TUBE
JAM NUT
CRUMBER BAR

3. Relieve the chain tension. See Figures #2 and #3

FIGURE #2 BOOM
TRENCHER MAINFRAME CLAMP
PLATES
CLAMP PLATE BOLTS

BOOM TUBE

LOOSEN THE FOUR CLAMP PLATE BOLTS

(THIS ALLOWS THE BOOM TUBE TO SLIDE LOOSENING THE DIGGING
CHAIN.) 6219
9-20-93
L L
MAINTENANCE

FIGURE #3
BOOM
CLAMP
TRENCHER MAINFRAME
PLATES
CLAMP PLATE BOLTS

ADJUSTING NUT
ADJUSTING STUD
BOOM TUBE

LOOSEN THE FOUR CLAMP PLATE BOLTS AND TURN ADJUSTING NUT
COUNTER CLOCKWISE UNTIL TENSION IS RELEASED

CAUTION! Once the digging chain has been removed the boom and boom
end idler are free to come off. Be careful that these compo-
nents do not fall off and possibly injure you or a bystander.

4. Remove one of the chain pins by straightening the chain keeper pin and
removing it with a pliers. The pin can now be pulled or driven out. See
Figure #4

FIGURE #4

PIN

KEEPER PIN

5. Carefully remove the digging chain from the boom end idler and drive
sprocket.

REVERSE THE PROCEDURE TO REINSTALL THE DIGGING CHAIN.

6220
9-20-93
L L
MAINTENANCE

HEADSHAFT DRIVE SPROCKET REMOVAL

1. To remove the headshaft drive sprocket, first remove the digging chain
and boom.

2. Remove the spiral auger by removing the three clamp bolts and slide the
auger off the headshaft. (Use a wedge or screwdriver to spread the
clamp for easy installation or removal.)

3. Remove the headshaft drive sprocket by removing the two clamp bolts
and sliding the sprocket off the headshaft. (Use a wedge or screwdriver
to spread the clamp for easy installation or removal.)

REVERSE THE PROCEDURE TO REINSTALL THE HEADSHAFT DRIVE

SPROCKET.

BOOM END IDLER BEARING REMOVAL

1. To remove the boom end idler bearing first remove the digging chain as
previously described in this section.

2. Remove the nylock capscrew and the square section pin from the boom
end. The idler spacers and wheel will separate from the chain guides
when the pin is removed. See FigureBOOM
#5. END

FIGURE #5
NYLOCK IDLER SPACER

IDLER WHEEL

BEARING
HUB

CAPSCREW

IDLER SPACER
SQUARE SECTION PIN

3. Press out the idler bearing from the idler wheel.

4. Press out the idler hub.

5. Check idler spacer, idler wheel, and bearing for wear and replace as
necessary.

REVERSE THE PROCEDURE TO REINSTALL THE END IDLER.

6221
9-20-93
L L
MAINTENANCE

FRICTION CLUTCH - PTO DRIVE ASSEMBLY

The 612 trencher friction clutches are belleville spring loaded, factory set
units which do not require readjustment over the life of the friction discs. After
each long period of inactivity the clutch must be slipped in order to avoid high
torque settings caused by the friction plates sticking. The clutch can be pur-
posely slipped by tightening the four nuts against the plate springs and then
turning the clutch rapidly. Back off the nut upon completion and the design
torque is automatically restored.
CAUTION! Any overheating caused by too long or too frequent operation
of the clutch must be avoided, since this can damage the
friction discs and clutch parts.
The condition of the friction discs can be determined without disassem-
bling the clutch. See Figure #6
FIGURE #6

Condition when new. If the thrust plate edges are no longer visible,
new friction discs are needed.

DIGGING TOOTH REPLACEMENT

Sharp teeth are important to good performance. When teeth wear out,
production will drop sharply, increasing wear and tear on other components.
Trenching chain costs per foot of trencher will increase dramatically.
Cup teeth wear on the tip and side bulge in varying amounts. Wear
patterns change with different digging conditions. The following patterns and
captions are approximate and should be used as a guide to help you determine
your own best cost / benefit tooth replacement time. Normal replacement should
be made between 30% and 60% reduction in performance. Replacement is a
simple bolt-on procedure.

New 20% Reduced 50% Reduced 70% Reduced Beyond

Performance Performance Performance Use
After the first 8 hours of operation and then at 100 hour intervals the
trencher drive chain should be checked for proper tension adjustment. Chain is
properly adjusted when the long side of chain can be moved by hand ½" either
way from centerline of chain. Improper adjustment will cause excessive wear on
drive chain and drive sprockets. 6222
9-20-93
L L
MAINTENANCE
FRICTION CLUTCH
DISASSEMBLY

BRADCO units not

equipped with warn-
ing device.

See disassembly instructions for quick If the clutch has a warning device, remove
disconnect lock, ball type, on Form #4-QD. the sleeve with the leaf springs by prying it
up with two screw drivers as illustrated.

Tighten the four hex nuts (12) uniformly until Use special tool SW18 to bend all four Remove the thrust plate with Belleville
the clutch pack and hub are loose. retaining lugs back on the edge of the clutch spring(s) and lug ring (if used) to get at the
housing. friction disks, drive plates and hub for
inspection and service. (Note: K92 two plate
ASSEMBLY does not use drive plates #8 & #9)

Place hub and friction disks into the clutch housing. Note that items #8 & #9 are only used in Use special tool SW18 to bend the retaining
the four plate clutch. Next, compress the Belleville spring(s) and the lug ring (if used) to the lugs inward over the Belleville spring edges
pressure plate by tightening the four hex nuts and placing them into the clutch housing as to secure the spring(s) when you back the
illustrated. four hex nuts off. (Note: Wide lugs for one
(1) Belleville spring, narrow lugs for two (2)
Belleville springs.)

With the lugs in place loosen the four hex Replace the quick-disconnect or clamp bolt
nuts completely to the end of the threaded assembly, if so equipped.
studs. (Replace the sleeve with the leaf
springs for the warning device if used.) 2625
7-24-02-2
L L
MAINTENANCE
SAFETY SHIELD
DISASSEMBLY

Use special tool SW21 to release bearing Or, clamp the P.T.O. yoke in the vise as
locking tabs and remove the shield from shown to create pressure on the locking tabs
P.T.O. drive shaft half. and use a flat bladed screw driver to release
one tab at a time to remove shield.

ASSEMBLY

Grease the shield bearing groove on the yoke and the telescoping tube before assembly. Place bearing ring in groove with the locking
tabs nearest the telescoping tube side.

To remove the old shield cone, cut the cone To mount the shield on to the half shaft, place it over the telescoping member, align the
near the bearing cap being careful not to locking tabs on the bearing in the appropriate channels of the bearing cap and push the
damage the cap. Heat the new shield cone shield into place or apply light blows until all three locking tabs are visible in the openings.
by placing the contact portion in water heated
to approximately 180° F. until it is very 1 2 3
flexible. Then, pull it over the tube and on to 1. Shield Cone
the bearing cap. As it cools, the cone will 2. Bearing Ring
return to its natural size and become secure 3. Outer shield tube with bearing cap
for normal function. 4 4. Safety Chain
5. Inner shield tube with bearing cap

2 1
5

Attach safety chain. 2626

7-24-02-2
L L
MAINTENANCE
U-JOINT
DISASSEMBLY

Remove retaining rings (3).

Place joint in the vise as illustrated (do not clamp tight) and with light hammer blows, drive
up the bearing bushing.

3 4
1 2

1. Quick-disconnect yoke coupling

Use special tool SW23 or SW27 to clamp the bearing 2. Cross and bearing kit coupling
bushing in the vise. Using either light hammer blows or by 3. Retaining ring
twisting the yoke, remove the bearing bushing. 4. Inboard yoke
ASSEMBLY

Clamp the yoke in the vise as illustrated. Remove Replace the retaining ring, make sure it is
Using a flat surfaced drift punch or
the bearing bushing from the cross kit and place properly seated.
the cross into one of the yokes. Begin mounting the
special tool SW28 drive the bearing in
bearings by extending the cross journal out through until the annular groove is visible.
the bearing bore. Place a bearing on it and holding
the cross with one hand to position the bearing, tap
with light hammer blows until you notice resistance.
Do the same for the opposite bearing.

When installing the second yoke and bearings, Relieve the stress from the bearings and Grease the joint. Note that all four bearings
make sure the grease zerk is positioned on the yoke by applying several sharp hammer are properly purged and rotate to make sure
proper side for easy access when lubricating. blows to the yoke ears. the U-joint will move freely.
Replace the bearings as described previously
using the cross journal to help guide the 2627
bearings into the bore. 7-24-02-2
MAINTENANCE INSTRUCTIONS
CYLINDER SEAL REPLACE

GENERAL INFORMATION
The following information is provided to assist you in the event you
should need to repair or rebuild a hydraulic cylinder. When working on
hydraulic cylinders, make sure that the work area and tools are clean and
free of dirt to prevent contamination of the hydraulic system and damage to
the hydraulic cylinders. Always protect the active part of the cylinder rod
(the chrome section). Nicks or scratches on the surface of the rod could
result in cylinder failure. Clean all parts thoroughly with a cleaning solvent
before reassembly.

DISASSEMBLY PROCEDURE

IMPORTANT: Do not contact the Pry up the end of the gland retaining
active surface of the cylinder rod with ring with a pointed tool. Rotate the
the vise. Damage to the rod could
result.

RETAINING RING TYPE GLAND

1. Mount the cylinder tube securely in
a vise. CAUTION: Do not clamp too
tight and distort the tube.

gland with a spanner wrench while

removing the retaining ring.

NOTE: On cylinders with gland retain-

ing rings, the gland and piston seal(s)
can be pulled out and cut as they
appear in the milled slot during disas-
2. Rotate the gland with a spanner
sembly. After cutting, pull them on
wrench (available from your dealer)
out through the milled slot.
until the gland retaining ring appears
in the milled slot. KNIFE

HOOK

5615
8-21-91
MAINTENANCE INSTRUCTIONS
CYLINDER SEAL REPLACE

3 . Pull the cylinder rod from the 6. Remove and discard all old seals.
cylinder tube.

THREADED TYPE GLAND

4 . Inspect the piston and the bore of
the cylinder tube for deep scratches or 1 . Rotate the gland with a spanner
galling. If damaged, the piston and wrench counter-clockwise until the
cylinder tube must be replaced. gland is free of the cylinder tube.

5 . Remove the hex nut, piston, flat

washer or spacer tube (if so equipped),
and gland from the cylinder rod. If the
cylinder rod is rusty, scratched, or
bent, it must be replaced.

2 . Pull the cylinder rod from the

cylinder tube same as shown with the
retaining ring type gland.
5608
8-21-91
MAINTENANCE INSTRUCTIONS
CYLINDER SEAL REPLACE
3 . Inspect the piston and the bore of ASSEMBLY PROCEDURE
the cylinder tube for deep scratches or
galling. If damaged, the piston and GENERAL
cylinder tube must be replaced.
IMPORTANT: Replace all seals even if
they do not appear to be damaged.
Failure to replace all seals may result
in premature cylinder failure.

1 . Install the cylinder rod seal in the

gland first. Be carefull not to damage
the seal in the process as it is some-
what difficult to install.
A special installation tool is available
to help with installing the seal. Simply
fit the end of the tool over the seal so
4 . Remove the hex nut, piston, flat that the large prong of the tool is on
washer or spacer tube (if so equipped), the outside of the seal, and the two
and gland from the cylinder rod. If the smaller prongs on the inside. The lip
cylinder rod is rusty, scratched, or of the seal should be facing towards
bent, it must be replaced. the tool.

65349

Rotate the handles on the tool around

to wrap the seal around the end of the
5. Remove and discard all the tool.
old seals.

5609
10-26-92-2
MAINTENANCE INSTRUCTIONS
CYLINDER SEAL REPLACE
RETAINING RING TYPE GLAND
1. After installing the internal
gland seal, install the external O-ring
and backup washer.

O - RING

Now insert the seal into the gland from

the inner end. Position the seal in it's BACKUP WASHER
groove, and release and remove the
tool. Press the seal into its seat the
rest of the way by hand. 2. Slide the gland onto the cylinder rod
being careful not to damage the rod wiper.
Then install the spacer, or flat washer (if so
equipped), small O-ring, piston, and hex
nut onto the end of the cylinder rod.

NOTE: Threaded gland is

shown above for reference.
2. Install the new piston ring, rod wiper,
O-rings, and backup washers, if appli-
cable, on the piston.
Be careful not to damage the seals. 3. Secure the cylinder rod (mounting
Caution must be used when installing end) in a vise, with a support at its
the piston ring. The ring must be center. Torque the nut to the amount
stretched carefully over the piston
with a smooth, round, pointed tool.

5610
8-21-91
MAINTENANCE INSTRUCTIONS
CYLINDER SEAL REPLACE

shown on the chart for the thread Rotate the gland until the gland retain-
diameter of the cylinder rod.(see chart) ing rod forms a ring between the gland
IMPORTANT: Do not contact the and the cylinder tube.
active surface of the cylinder rod with When complete, the bent end of the
the vise. Damage to the rod could gland retainer ring should be hidden
result. (not turned so it is exposed in the slot)
to prevent it from popping out.
4 . Apply a lubricant (such as Lu-
briplate #105) to the piston and teflon
ring. Insert the cylinder rod assembly
into the cylinder tube.

THREADED TYPE GLAND

1. After installing the rod seal

inside the gland as shown in the
IMPORTANT: Ensure that the piston general instructions, install the
ring fits squarely into the cylinder tube external seal.
and piston groove, otherwise the ring
may be damaged and a leak will occur. NOTE: Threaded glands may have
been equipped with a separate O-
5 . Rotate the gland with a spanner ring and backup washer system or a
wrench until the hole (drilled into the polypak (all-in-one) type seal.
retaining slot of the gland) appears in Current seal kits contain a polypak
the milled slot of the cylinder tube. (all-in-one) type seal to replace the
Insert the hooked end of the gland discarded seal types on all threaded
retaining rod into the hole. glands.

5611
8-21-91
MAINTENANCE INSTRUCTIONS
CYLINDER SEAL REPLACE

2 . Slide the gland onto the cylinder INPORTANT: Ensure that the piston
rod being careful not to damage the ring fits squarely into the cylinder tube
rod wiper. Then install the spacer, or and piston groove, otherwise the ring
flat washer (if so equipped), small O- may be damaged and a leak will occur.
ring, piston, and hex nut onto the end
of the cylinder rod.

5 . Use a spanner wrench to rotate

the gland clockwise into the cylinder.
Continue to rotate the gland with the
spanner wrench until it is tight.
3 . Secure the cylinder rod (mount-
ing end) in a vise, with a support at it's
center. Torque the nut to the amount
shown for the thread diameter of the
cylinder rod ( see chart ).

NOTE: Seal kits will service all back-

hoe cylinders of similar bore size and
rod diameter.

WARNING! Cylinders serviced in the

field are to be tested for
IMPORTANT: Do not contact the
leakage prior to the hoe
active surface of the cylinder rod with
being placed in work.
the vise. Damage to the rod could
Failure to test rebuilt cyl-
result.
inders could result in
damage to the cylinder
4 . Apply a lubricant (such as Lu- and/or backhoe, cause
briplate #105) to the piston and teflon severe personal injury, or
ring. Insert the cylinder rod assembly even death.
into the cylinder tube.
5612
8-21-91
MAINTENANCE INSTRUCTIONS
CYLINDER SEAL REPLACE

TORQUE SPECIFICATION CHART

Use the following torque values when tightening the nuts on the cylinder rod threads.

POUNDS - FEET

Thread Diameter Minimum Maximum

7/8 " 150 200

* 1 " 230 325

1-1/8 " 350 480

1-1/4 " 490 670

1-3/8 " 670 900

* 1" Thread Diameter WITH 1.25" Rod Diameter ...... Min. 230 ft. lbs. .......... Max. 250 ft. lbs.

5613
10-16-98-2
M M
TRENCHER STORAGE
612 TRENCHER

GENERAL INFORMATION

The following storage procedures will help you to keep your trencher in
top condition. They will also help you get off to a good start the next time your
trencher is needed. We therefor strongly recommend that you take the extra
time to follow these procedures whenever your trencher will not be used for an
extended period of time.

PREPARATION FOR STORAGE

1. Clean the trencher exterior thoroughly, removing all mud, dirt, and grease.

2. Tighten all loose bolts, nuts, and set screws.

3. Touch up unpainted and exposed areas with paint to prevent rust.

4. Coat the digging chain with a thin covering of oil. Operate chain for a
short period to work the oil into the pins.

5. Check gear box oil level and conditions. If contaminated, drain and refill.

6. Store the trencher in a dry and protected place. Leaving the trencher
outside, exposed to the elements will materially shorten its life.

7. Inspect trencher for visible signs of wear, breakage or damage. Order

any parts required and make necessary repairs to avoid delays when
starting next season.

8. Replace operating decals if damaged or in unreadable condition.

REMOVING FROM STORAGE

1. Remove all protective coverings.

2. Check hydraulic hoses for deterioration and if necessary, replace.

3. Check gear box oil level.

4. Tighten all loose bolts, nuts, and set screws.

5. During cold weather, operate the trencher slowly for a short time before
placing the unit under full load.

6177
7-26-93
N N
TROUBLE SHOOTING
612 TRENCHER

GENERAL INFORMATION

Your trencher was designed to be as simple and trouble free as possible.

The purpose of this section is to help you in the event that a problem does de-
velop. While we cannot possibly cover every problem that might occur, you will
find that those that are most common are covered here.

PROBLEM: 3-POINT WILL NOT RAISE OR LOWER

POSSIBLE CAUSE AND REMEDY:

1. Incorrect tractor hydraulic oil level. Check tractor hydraulic oil level
and maintain proper level.

2. Quick coupler not completely engaged. Check to see that all couplers
are matched pairs and engaged correctly.

3. Quick coupler or hose restriction. Check for dirt, rust, or other contami-
nates and repair or replace as needed.

4. Incorrect hose routing. See operator's manual for correct hose routing.

5. Lift arms not parallel. (This is critical only on small tractors with limited
lift capacity.) Adjust top link length and position all three links as parallel
as possible.

6. Incorrect PTO drive installation. Check PTO for proper length and
installation. (See Mounting Kit Installation)

7. Insufficient pump pressure. Check tractor pump pressure and adjust or

repair as required.

PROBLEM: HYDRAULIC OIL OVERHEATING

POSSIBLE CAUSE AND REMEDY:

1. Tractor relief valve set too low. See tractor operator's manual and/or
dealer for proper relief valve service and adjustment. Adjust relief valve
to proper PSI.

6182
7-27-93
N N
TROUBLE SHOOTING
612 TRENCHER

2. Quick coupler or hose restriction. Check for dirt, rust, or other contami-
nates and repair or replace as needed.

3. Relief valve stuck open. Have relief valve serviced and checked by an
authorized dealer.

4. 3-point control in extreme "UP" position. (Applies only on some tractor

models.) Lower 3-point control lever until system discontinues going over
relief.

5. Creeping in other than low range in transmission. (Hydrostatic trans-

missions only.) Trench only in low range of transmission.

PROBLEM: PTO SHAFT DOES NOT TURN

POSSIBLE CAUSE AND REMEDY:

1. PTO shaft not properly installed. Check shaft for proper installation.

2. Slip clutch or tractor clutch slipping. Check chain for dirt build up and/
or rocks in chain. Turn chain to remove all foreign material.

3. PTO in tractor not properly engaged. Engage PTO properly or repair

tractor.

PROBLEM: HEADSHAFT AND AUGER TURNS - DIGGING CHAIN DOES

NOT

POSSIBLE CAUSE AND REMEDY:

1. Digging chain sprocket slipping on headshaft. Check sprocket and

tighten bolts or replace as necessary.

PROBLEM: PTO TURNS - DIGGING CHAIN \ AUGERS DO NOT TURN

POSSIBLE CAUSE AND REMEDY:

1. Digging chain bound up. Check chain for dirt build up and/or rocks in
chain. Remove foreign material. 6183
7-27-93
N N
TROUBLE SHOOTING
612 TRENCHER

2. PTO clutch slipping. Remove clutch and inspect. (Look for discolored
paint of clutch housing.) Repair or replace as necessary.

3. Key sheared at trencher end of PTO shaft. Remove shaft and replace
key.

4. Broken chain or sprocket slipping inside of chain cover. Remove

cover and check chain and sprocket. Repair or replace as necessary.

5. Sheared key or broken gear in gear box. Remove gear box cover and
inspect. Repair or replace as necessary.

PROBLEM: GEARBOX LEAKING OIL

POSSIBLE CAUSE AND REMEDY:

1. Oil level too high. Drain and fill to proper level.

2. Plugged or wrong vent plug. Clean or replace with correct vent plug.

3. Seals worn or defective. Inspect seal, bearing and housing. Replace as

required.

PROBLEM: POOR TRENCH PRODUCTION

POSSIBLE CAUSE AND REMEDY:

1. Digging teeth worn or missing. See maintenance - Section L in this

manual. Inspect teeth and replace as needed. (Excessively worn teeth
can cut a trench that is too narrow for boom end to slide through.)

2. Augers running on ground. Raise headshaft to keep auger off ground.

3. Incorrect tooth style or spacing for digging conditions. Consult

manual for correct tooth style and spacing. Left/right must be balanced to
within one tooth difference.

6184
7-27-93
N N
TROUBLE SHOOTING
612 TRENCHER

4. Turning too short of radius with tractor. Make wider turns or remove
trencher from the ditch and reposition. See "Operating Instructions" sec-
tion of this manual.

5. Trenching on uneven terrain. Level trench path before trenching.

6. Digging chain too tight. Adjust to proper tension. Digging chain should
be tight enough to remain on sprockets while turning under load. There
should be some sag in the chain. If too tight, loosen chain by the adjust-
ing nut(s) on the boom.

7. Trenching uphill. Trench downhill whenever possible.

8. Incorrect boom angle for trenching conditions. Trench at recom-

mended angle. Refer to "Operating Instructions" section of this manual.

9. Trencher not setting level. Adjust leveling lift linkage.

6185
7-27-93
O O
BOLT TORQUE
BOLT TORQUE SPECIFICATIONS
GENERAL TORQUE SPECIFICATION TABLE
Use the following torques when special torques are not given. These values apply to fasteners as
received from suppliers, dry, or when lubricated with normal engine oil. They do not apply if special
graphited or moly disulphide greases or other extreme pressure lubricants are used. This applies to both
UNF and UNC threads. Remember to always use grade five or better when replacing bolts.

SAE Grade No. 2 5 8*

Bolt head identification
marks as per grade.
NOTE: Manufacturing
Marks Will Vary
TORQUE TORQUE TORQUE

Bolt Size Pounds Feet Newton-Meters Pounds Feet Newton-Meters Pounds Feet Newton-Meters
Inches Millimeters Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
1/4 6.35 5 6 6.8 8.13 9 11 12.2 14.9 12 15 16.3 30.3
5/16 7.94 10 12 13.6 16.3 17 20.5 23.1 27.8 24 29 32.5 39.3
3/8 9.53 20 23 27.1 31.2 35 42 47.5 57.0 45 54 61.0 73.2
7/16 11.11 30 25 40.7 47.4 54 64 73.2 86.8 70 84 94.9 113.9
1/2 12.70 45 52 61.0 70.5 80 96 108.5 130.2 110 132 149.2 179.0
9/16 14.29 65 75 88.1 101.6 110 132 149.2 179.0 160 192 217.0 260.4
5/8 15.88 95 105 128.7 142.3 150 180 203.4 244.1 220 264 298.3 358.0
3/4 19.05 150 185 203.3 250.7 270 324 366.1 439.3 380 456 515.3 618.3
7/8 22.23 160 200 216.8 271.0 400 480 542.4 650.9 600 720 813.6 976.3
1 25.40 250 300 338.8 406.5 580 696 786.5 943.8 900 1080 1220.4 1464.5
1-1/8 25.58 - - - - 800 880 1084.8 1193.3 1280 1440 1735.7 1952.6
1-1/4 31.75 - - - - 1120 1240 1518.7 1681.4 1820 2000 2467.9 2712.0
1-3/8 34.93 - - - - 1460 1680 1979.8 2278.1 2380 2720 3227.3 3688.3
1-1/2 38.10 - - - - 1940 2200 2630.6 2983.2 3160 3560 4285.0 4827.4
* Thick Nuts must be used with Grade 8 bolts

METRIC BOLT TORQUE SPECIFICATIONS

Coarse Thread Fine Thread

Size of Screw Grade No. Ptich (mm) Pounds Feet Newton-Meters Pitch (mm) Pounds Feet Newton-Meters
5.6 3.6-5.8 4.9-7.9 - -
M6 8.8 1.0 5.8-9.4 7.9-12.7 - - -
10.9 7.2-10 9.8-13.6 - -
5.6 7.2-14 9.8-19 12-17 16.3-23
M8 8.8 1.25 17-22 23-29.8 1.0 19-27 25.7-36.6
10.9 20-26 27.1-35.2 22-31 29.8-42
5.6 20-25 27.1-33.9 20-29 27.1-39.3
M10 8.8 1.5 34-40 46.1-54.2 1.25 35-47 47.4-63.7
10.9 38-46 51.5-62.3 40-52 54.2-70.5
5.6 28-34 37.9-46.1 31-41 42-55.6
M12 8.8 1.75 51-59 69.1-79.9 1.25 56-68 75.9-92.1
10.9 57-66 77.2-89.4 62-75 84-101.6
5.6 49-56 66.4-75.9 52-64 70.5-86.7
M14 8.8 2.0 81-93 109.8-126 1.5 90-106 122-143.6
10.9 96-109 130.1-147.7 107-124 145-168
5.6 67-77 90.8-104.3 69-83 93.5-112.5
M16 8.8 2.0 116-130 157.2-176.2 1.5 120-138 162.6-187
10.9 129-145 174.8-196.5 140-158 189.7-214.1
5.6 88-100 119.2-136 100-117 136-158.5
M18 8.8 2.0 150-168 203.3-227.6 1.5 177-199 239.8-269.6
10.9 175-194 237.1-262.9 202-231 273.7-313
5.6 108-130 146.3-176.2 132-150 178.9-203.3
M20 8.8 2.5 186-205 252-277.8 1.5 206-242 279.1-327.9
10.9 213-249 288.6-337.4 246-289 333.3-391.6

3915
6-8-95-2
P P
SPECIFICATIONS
612 TRENCHER
TRENCHER DIMENSIONS

H
L
E

C
D
N
A

B
SPECIFICATIONS AND DESIGN ARE
DESCRIPTION SPEC.
SUBJECT TO CHANGE WITHOUT NO-
TICE AND WITHOUT LIABILITY THERE- A. Trench Depth w/Auger Touching Ground
FORE. WHENEVER APPLICABLE At a 60° Digging Angle
SPECIFICATIONS ARE IN ACCOR-
30" Boom ........................................................... 30.00"
DANCE WITH SAE STANDARDS.
36" Boom ........................................................... 36.00"
48" Boom ........................................................... 48.00"
STANDARD FEATURES 60" Boom ........................................................... 60.00"
B. Trench Width
v 3-Point hitch mounting system (Category All Boom Lengths ................................................. 6.00"
#1) 30", 36", 48" Boom Lengths ................................. 8.00"
30", 36" Boom Lengths ....................................... 10.00"
v Dual pitch convenience
30" Boom Length ................................................ 12.00"
v Remote valve for dual pivot control (power C. Distance from 3-Point to Headshaft .......................... 24.25"
beyond capability) D. Recommended Trenching Angle ........................... 60°- 65°
E. Total Headshaft Movement ...................................... Varies
v Heavy duty gear box
F. Headshaft Height (w/Auger Touching Ground) ......... 10.00"
v Heavy duty headshaft and bearings G. Trencher Length (From 3-Point to End
protected with "CAT" duo cone seal of Crumber Shoe - Transport Position) ..................... 69.00"
H. Trencher Width ......................................................... 43.00"
v Heavy duty roller chain and hardened
sprockets
L. Transport Height ....................................................... Varies
N. Centerline of Trench to Outside of Auger ................. 27.00"
v Drive line protected with slip clutch
3-Point Mounting ..................................................... Category 1
v 43,000# 2.00" pitch trenching chain and Chain Speed @ 540 RPM .......................................... 308 FPM
sprockets Weight w/36" Boom and 6" Chain ................ 850 lbs. (385 kgs)
v Ribbon type discharge auger NOTES:
1. Specifications may vary between tractor models.
v 6.00" - 12.00" digging widths available 2. Trench depths given are as calculated on drawings. Actual depths during
operation will vary due to tractor model, tire size, ground conditions and carryover.
v High profile, high strength trenching teeth 3. Trench depths and widths shown are maximum recommended for general
with hard surfacing service and use. ATI Incorporated makes no claim or warranty that you will be able
to operate satisfactorily at these depths and widths or that you cannot exceed these
v Crumber assembly matched to boom and recommendations in your application.
trench size

v Chain guides to prevent trenching chain

run-off 6249
10-6-93
P P
SPECIFICATIONS
NOISE EMISSIONS DATA

MACHINE TYPE ................................................................................................ TRENCHER ATTACHMENT

BRADCO MODEL NO ........................................................................................................................... 6 1 2
METHOD OF DRIVE ....................................................................................................... POWER TAKE OFF
POWER SOURCE ............................................................................ 14.2 kW (19HP) COMPACT TRACTOR
RATED SPEED DURING TEST .................................................................................................... 2600 RPM
MOUNTING CONDITIONS DURING TEST ........................................................................... 3 POINT HITCH
TO RUBBER TIRED TRACTOR

INSTRUMENT LOCATION (10M HEMISPHERE)

POSITION X Y Z
2 7.1m 7.1m 1.5m
4 -7.1m 7.1m 1.5m
6 -7.1m -7.1m 1.5m
8 7.1m -7.1m 1.5m

OPERATOR'S EAR POSITION COORDINATES (SEE NOTE)

RH 100mm -250mm 760mm
LH 100mm 250mm 760mm
NOTE: X COORDINATE IS FORWARD FROM SEAT BACK
Y COORDINATE IS FROM CENTER AXIS OF SEAT
Z COORDINATE IS FROM LOADED SEAT CUSHION

MEASURED EMISSION SOUND PRESSURE AT

OPERATOR'S EAR (including power unit)
LOCATION LpA (dBA)
RH 88.7 MICROPHONE POSITIONS ON 10m
LH 89.0 HEMISPHERE CENTERED ON MACHINE
ARITHMETIC MEAN VALUE 88.8 (NOT TO SCALE)
CALCULATED EMISSION SOUND PRESSURE AT
OPERATOR'S EAR (excluding power unit)
LOCATION LpA (dBA)
RH 80.7
LH 79.8
ARITHMETIC MEAN VALUE 80.3

MEASURED SOUND POWER @ 10m HEMISPHERICAL

SURFACE (including power unit)
READING LWA (dBA)
1 103.8
2 103.5
3 103.8
ARITHMETIC MEAN VALUE 103.8
CALCULATED SOUND POWER @ 10m HEMISPHERICAL
SURFACE (excluding power unit)
READING LWA (dBA)
1 93.6
2 93.4
3 95.1
ARITHMETIC MEAN VALUE 94.4

MEASUREMENTS CONFORM WITH SAE STANDARD NO J1805 (EQUIVALENT TO ISO 6393) EXCEPT
UPPER POINTS ON HEMISPHERE WERE NOT INCLUDED.

6622
5-25-95
Q Q
DECALS
DECAL PLACEMENT
612 TRENCHER

The diagrams on this page show the location of all the decals used on the
612 trencher. The decals are identified by their part numbers, with reductions of
the actual decals located on the following pages. Use this information to order
replacements for lost or damaged decals. Be sure to read all decals before
operating the trencher. They contain information you need to know for both
safety and trencher longevity.
4338
40158

4084

4495 4132
4285 4286
4291

4494

40092

40157
4498

4105

4084

40161
4056

4350

40092

40157

6245
10-5-93
Q Q
DECALS

BOOM CONTROL
DOWN
BRADCO
612
TRENCHER
BRADCO LOGO
UP #40158 PART #40092

BOOM CONTROL
PART #40158

612
MODEL NUMBER DECAL
PART #40157

DANGER! ROTATING DRIVELINE DANGER! SHIELD MISSING

PART #4286 PART #4285
(LOCATED ON PTO) (LOCATED ON INSIDE PTO SHAFT)

6246
8-2-02-2
Q Q
DECALS

WARNING
PART #4495

QUICK COUPLER HOOK-UP

PART #4291

OPERATOR'S WARNING
PART #4494

TOOTH SET-UP WARNING

PART #4056
SERIAL NUMBER TAG
PART #4350

6247
8-2-02-2
Q Q
DECALS

STAND CLEAR
DANGER
DANGER STAND CLEAR
PART #4105

CHECK OIL LEVEL

PART #4132

MADE IN USA

MADE IN USA
PART #4338

DANGER STAND CLEAR

PART #4498

STAND CLEAR
STAND CLEAR GREASE 8 HOURS
PART #40161 PART #4084

6248
8-2-02-2
R R
PREDELIVERY CHECKLIST

GENERAL INFORMATION

The following is a list of areas that should be inspected by the dealer prior
to delivery of the trencher to the customer. The customer should check the list
and make sure that the dealer has completed the inspection. Completion of this
checklist will help insure that the customer receives the trencher in complete
working order, ready to install.

PREDELIVERY CHECKLIST - CHECK AND ADJUST AS NECESSARY

1. _____ Check the hydraulic system for correct hydraulic fluid level.

2. _____ Check and lubricate trencher, gear box, and PTO shaft if neces-
sary. See "Lubrication" section.

3. _____ Visually inspect the trencher for bent, loose, cracked, damaged or
missing parts. Check for any other irregularities.

4. _____ Remove paint from finished (chrome) surfaces of cylinders and

valve spools.

5. _____ Trencher control levers operate in accordance with the control

lever decals.

6. _____ Run cylinders through their full cycle to purge any air from the
system.

7. _____ Check all hydraulic connections for leaks and all hoses for proper
positioning to reduce chafing and binding.

8. _____ Check the trencher's digging chain adjustment.

9. _____ Check trencher attachment bolts for tightness. Retighten after the
first eight working hours, and after every forty working hour inter-
vals thereafter. See "Bolt Torque" section.

10. _____ Make sure decals are not damaged or missing and are in their
correct location. See "Decals" section.

11. _____ Complete and return the manufacturers "Warranty Validation Form"
and sign your dealership predelivery checklist.

12. _____ Operator to read the Trencher Safety Manual(s) provided, before
operating trencher.

4203
8-1-02-2