www.wackergroup.

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Trench Roller
RT 56-SC
RT 82-SC


REPAIR MANUAL
0160393en 004
1006
0 1 6 0 3 9 3 E N
Foreword
wc_tx000397gb.fm i
Operating / Parts Information
You must be familiar with the operation of this machine before you
attempt to troubleshoot or repair it. Basic operating and maintenance
procedures are described in the Operators Manual supplied with the
machine. Keep a copy of the Operators Manual with the machine at all
times. Use the separate Parts Book supplied with the machine to order
replacement parts. If you are missing either of the documents, please
contact Wacker Corporation to order a replacement.
Damage caused by misuse or neglect of the unit should be brought to
the attention of the operator to prevent similar occurrences from
happening in the future.
This manual provides information and procedures to safely repair and
maintain the above Wacker model(s). For your own safety and
protection from injury, carefully read, understand, and observe all
instructions described in this manual. THE INFORMATION
CONTAINED IN THIS MANUAL IS BASED ON MACHINES
MANUFACTURED UP TO THE TIME OF PUBLICATION. WACKER
CORPORATION RESERVES THE RIGHT TO CHANGE ANY
PORTION OF THIS INFORMATION WITHOUT NOTICE.
This manual covers machines with Item Number:
0009025, 0009026
Foreword
wc_tx000397gb.fm ii
CALIFORNIA
Proposition 65 Warning:
Engine exhaust, some of its constituents, and certain vehicle
components, contain or emit chemicals known to the State of
California to cause cancer and birth defects or other reproductive
harm.
All rights, especially copying and distribution rights, are reserved.
Copyright 2006 by Wacker Corporation
No part of this publication may be reproduced in any form or by any
means, electronic or mechanical, including photocopying, without
express written permission from Wacker Corporation.
Any type of reproduction or distribution not authorized by Wacker
Corporation represents an infringement of valid copyrights, and
violators will be prosecuted. We expressly reserve the right to make
technical modifications, even without due notice, which aim at
improving our machines or their safety standards.
WARNING
RT SC Repair Table of Contents
wc_br0160393en_004TOC.fm 1
1. Safety Information 5
1.1 Laws Pertaining to Spark Arresters ...................................................... 5
1.2 Operating Safety .................................................................................. 6
1.3 Operator Safety while using Internal Combustion Engines .................. 8
1.4 Service Safety ...................................................................................... 8
1.5 Label Locations .................................................................................. 10
1.6 Warning and Informational Labels ...................................................... 11
2. Technical Data 15
2.1 Engine ................................................................................................ 15
2.2 Roller .................................................................................................. 16
2.3 Lubrication .......................................................................................... 17
2.4 Sound and Vibration Measurements .................................................. 18
2.5 Dimensions ......................................................................................... 18
3. Operation 19
3.1 Information Regarding Operation ....................................................... 19
3.2 Operation and Service Locations ....................................................... 20
3.3 Control Panel ...................................................................................... 24
3.4 SmartControl Transmitter ............................................................... 26
3.5 Infra-red System and Control Channels ............................................. 30
3.6 Before Starting ................................................................................... 32
3.7 Starting ............................................................................................... 33
3.8 Stopping ............................................................................................. 34
3.9 Operation ............................................................................................ 35
4. Maintenance 36
4.1 Transporting Machine ......................................................................... 36
4.2 Lifting Machine ................................................................................... 36
4.3 Job Site Storage ................................................................................. 37
4.4 Storage ............................................................................................... 38
4.5 New Machines .................................................................................... 38
4.6 Periodic Maintenance Schedules ....................................................... 39
4.7 Hydraulic Oil Requirements ................................................................ 40
Table of Contents RT SC Repair
wc_br0160393en_004TOC.fm 2
4.8 Hydraulic Oil Level ..............................................................................40
4.9 Changing Hydraulic Oil & Filter ...........................................................41
4.10 Articulated Joint, Steering Cylinder, and Hood Hinges .......................42
4.11 Cleaning SmartControl Transmitter .................................................42
4.12 Drive Gearcase ...................................................................................43
4.13 Exciter Lubrication ...............................................................................44
4.14 Scrapers ..............................................................................................45
4.15 Shockmounts .......................................................................................45
4.16 Changing Drums .................................................................................46
4.17 Battery .................................................................................................47
4.18 Engine Oil System ...............................................................................48
4.19 Engine Oil and Filter ............................................................................49
4.20 Air Cleaner ..........................................................................................50
4.21 Engine Fuel Delivery System Maintenance .........................................51
4.22 Fuel Filter ............................................................................................51
4.23 Priming the Fuel System .....................................................................52
4.24 Engine Coolant ....................................................................................52
4.25 Valve Clearances ................................................................................53
4.26 Adjusting Engine Fan Belt ...................................................................54
4.27 Wiring Schematic ................................................................................56
4.28 Basic Troubleshooting .........................................................................58
5. Engine Starting Troubleshooting 60
5.1 Component Locations .........................................................................60
5.2 Troubleshooting Flowcharts ................................................................61
5.3 Engine Does Not CrankFlowchart 1A ..............................................62
5.4 Checking 20A Fuse .............................................................................64
5.5 Checking Starter Circuit at Trailer Plug ...............................................64
5.6 Checking Receiving Eyes ....................................................................65
5.7 Replacing Receiving Eye/Light Ring ...................................................66
5.8 Checking Power to Starter Solenoid ...................................................68
5.9 Replacing Keyswitch ...........................................................................70
5.10 Checking NiCad Battery Charge .........................................................71
5.11 Engine Cranks But Does Not StartFlowchart 2A ............................72
5.12 Checking Fuel Line at Fuel Rail Inlet ...................................................74
5.13 Checking 50A Circuit Breaker .............................................................74
5.14 Checking Power to Glow Plugs ...........................................................75
5.15 Checking Glow Plugs ..........................................................................75
5.16 Checking Relay Wiring ........................................................................76
5.17 Confirming a Malfunctioning Relay ......................................................77
RT SC Repair Table of Contents
wc_br0160393en_004TOC.fm 3
5.18 Testing ECM ....................................................................................... 78
5.19 Checking Fuel Solenoid ..................................................................... 79
5.20 Replacing Battery ............................................................................... 80
5.21 Replacing Trailer Plug ........................................................................ 81
6. Hydraulic System 83
6.1 Hydraulic Manifold .............................................................................. 84
6.2 Hydraulic Valves ................................................................................. 85
6.3 Hydraulic System Pressures .............................................................. 85
6.4 Hydraulic Schematics ......................................................................... 86
6.5 Hydraulic Diagram .............................................................................. 90
6.6 Hydraulic Diagram Components ........................................................ 91
6.7 Exciter Circuit ..................................................................................... 92
6.8 Drive and Brake Circuit ...................................................................... 96
6.9 High-Speed Drive and Brake Circuit ................................................ 100
6.10 Steering Circuit ................................................................................. 102
7. Hydraulic Troubleshooting 105
7.1 No VibrationFlowchart 3A ............................................................. 105
7.2 Checking Power to, and Operation of, Decoder Module .................. 106
7.3 Replacing Decoder Module .............................................................. 108
7.4 Checking Solenoid Lead .................................................................. 110
7.5 Checking Solenoids .......................................................................... 110
7.6 Replacing Solenoid .......................................................................... 111
7.7 Checking Pressure at Gauge Port 1 (G-P1) ..................................... 112
7.8 Checking Function of Exciter Motors ................................................ 113
7.9 No Steering TroubleshootingFlowchart 4A ................................... 114
7.10 No Travel TroubleshootingFlowchart 5A ...................................... 115
7.11 Checking Pressure at Gauge Port 2 (G-P2) ..................................... 116
7.12 Checking Function of Brake ............................................................. 116
7.13 Checking Function of Drive Motors .................................................. 117
7.14 No High Speed Travel TroubleshootingFlowchart 6A ................... 118
Table of Contents RT SC Repair
wc_br0160393en_004TOC.fm 4
8. Disassembly/Reassembly Procedures 119
8.1 Tools ..................................................................................................119
8.2 Ordering Parts ...................................................................................119
8.3 Reference Numbers ( ) ......................................................................119
8.4 Weight Block .....................................................................................119
8.5 Articulated Joint .................................................................................120
8.6 Drum Support Exploded View ...........................................................122
8.7 Drum Support Components ...............................................................123
8.8 Identifying Drum Supports .................................................................124
8.9 Removing Drums ...............................................................................125
8.10 Installing Drums .................................................................................126
8.11 Opening Drum ...................................................................................126
8.12 Closing Drum .....................................................................................127
8.13 Disassembling Drive Hub ..................................................................128
8.14 Reassembling Drive Hub ...................................................................130
8.15 Disassembling Slave Hub .................................................................132
8.16 Reassembling Slave Hub ..................................................................134
8.17 Rebuilding Brake ...............................................................................136
8.18 Exciter Exploded View .......................................................................138
8.19 Exciter Parts List ...............................................................................139
8.20 Disassembling Exciter .......................................................................140
8.21 Reassembling Exciter ........................................................................142
8.22 Removing Drum Support ...................................................................144
8.23 Installing Drum Support .....................................................................146
8.24 Replacing Steering Cylinder ..............................................................148
8.25 Replacing Valve Block .......................................................................150
8.26 Replacing Fuel Tank .........................................................................152
8.27 Replacing Hydraulic Tank .................................................................154
8.28 Replacing Hydraulic Pumps ..............................................................156
8.29 Replacing Hydraulic Oil Cooler .........................................................158
8.30 Replacing Radiator and Shroud ........................................................160
8.31 Replacing Engine ..............................................................................164
8.32 Engine Alternator ...............................................................................168
9. Rebuilding Control Box 170
9.1 Removing/Rebuilding Joysticks .........................................................170
9.2 Removing and Installing Circuit Boards ............................................172
9.3 Removing & Testing Control Button Circuit Board ............................174
RT /... Safety Information
wc_si000080gb.fm 5
1. Safety Information
This manual contains DANGER, WARNING, CAUTION, and NOTE
callouts which must be followed to reduce the possibility of personal
injury, damage to the equipment, or improper service.
This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that follow this
symbol to avoid possible injury or death.
DANGER indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
CAUTION: Used without the safety alert symbol, CAUTION indicates
a potentially hazardous situation which, if not avoided, may result in
property damage.
Note: Contains additional information important to a procedure.
1.1 Laws Pertaining to Spark Arresters
Notice: State Health Safety Codes and Public Resources Codes
specify that in certain locations spark arresters be used on internal
combustion engines that use hydrocarbon fuels. A spark arrester is a
device designed to prevent accidental discharge of sparks or flames
from the engine exhaust. Spark arresters are qualified and rated by
the United States Forest Service for this purpose.
In order to comply with local laws regarding spark arresters, consult
the engine distributor or the local Health and Safety Administrator.
DANGER
WARNING
CAUTION
Safety Information RT /...
wc_si000080gb.fm 6
1.2 Operating Safety
Familiarity and proper training are required for the safe operation of
equipment. Equipment operated improperly or by untrained personnel
can be dangerous. Read the operating instructions contained in both
this manual and the engine manual and familiarize yourself with the
location and proper use of all controls. Inexperienced operators should
receive instruction from someone familiar with the equipment before
being allowed to operate the machine.
1.2.1 ALWAYS operate machine with all safety devices and guards in place
and in working order. DO NOT modify or defeat safety devices. DO
NOT operate machine if any safety devices or guards are missing or
inoperative.
1.2.2 ALWAYS disengage and stow the locking bar for the articulated
steering joint before operating the machine. The machine cannot be
steered when the locking bar is engaged.
1.2.3 ALWAYS check that all controls are functioning properly immediately
after start-up! DO NOT operate machine unless all controls operate
correctly.
1.2.4 ALWAYS remain aware of changing positions and the movement of
other equipment and personnel on the job site.
1.2.5 ALWAYS remain in visual contact with machine at all times while
operating controls.
1.2.6 ALWAYS remain aware of changing surface conditions and use extra
care when operating over uneven ground, on hills, or over soft or
coarse material. The machine could shift or slide unexpectedly.
1.2.7 ALWAYS use caution when operating near the edges of pits, trenches
or platforms. Check to be sure that the ground surface is stable enough
to support the weight of the machine with the operator and that there
is no danger of the roller sliding, falling, or tipping.
1.2.8 ALWAYS position yourself safely when operating machine in reverse
or on hills. Leave enough space between yourself and the machine so
you will not be placed in a hazardous position should the machine slide
or tip.
1.2.9 ALWAYS use the SmartControl transmitter neck strap provided by
Wacker while operating with the control cable connected. This neck
strap is designed to break away so that the operator will not be
dragged by the machine should the machine slide, tip, or fall.
1.2.10 ALWAYS wear protective clothing appropriate to the job site when
operating equipment.
1.2.11 ALWAYS remain aware of moving parts and keep hands, feet, and
loose clothing away from the moving parts of the equipment.
WARNING
RT /... Safety Information
wc_si000080gb.fm 7
1.2.12 ALWAYS read, understand, and follow procedures in the Operators
Manual before attempting to operate the equipment.
1.2.13 ALWAYS store the equipment properly when it is not being used.
Equipment should be stored in a clean, dry location out of the reach of
children.
1.2.14 NEVER allow anyone to operate this equipment without proper
training. People operating this equipment must be familiar with the
risks and hazards associated with it.
1.2.15 NEVER touch the engine or muffler while the engine is on or
immediately after it has been turned off. These areas get hot and may
cause burns.
1.2.16 NEVER use accessories or attachments that are not recommended by
Wacker. Damage to equipment and injury to the user may result.
1.2.17 NEVER leave machine running unattended.
1.2.18 NEVER start a defective unit in need of service or repair.
1.2.19 NEVER operate the machine with the fuel cap loose or missing.
1.2.20 NEVER operate multiple rollers within 45 feet (14 meters) of one
another, unless you are certain that each roller and its accompanying
transmitter have been set to a different control channel than the other
rollers/transmitters being used within the area. Refer to section Setting
Control Channels for additional information.
Safety Information RT /...
wc_si000080gb.fm 8
1.3 Operator Safety while using Internal Combustion Engines
Internal combustion engines present special hazards during operation
and fueling. Read and follow the warning instructions in the engine
owners manual and the safety guidelines below. Failure to follow the
warnings and safety guidelines could result in severe injury or death.
1.3.1 DO NOT run the machine indoors or in an enclosed area such as a
deep trench unless adequate ventilation, through such items as
exhaust fans or hoses, is provided. Exhaust gas from the engine
contains poisonous carbon monoxide gas; exposure to carbon
monoxide can cause loss of consciousness and may lead to death.
1.3.2 DO NOT smoke while operating the machine.
1.3.3 DO NOT smoke when refueling the engine.
1.3.4 DO NOT refuel a hot or running engine.
1.3.5 DO NOT refuel the engine near an open flame.
1.3.6 DO NOT spill fuel when refueling the engine.
1.3.7 DO NOT run the engine near open flames.
1.3.8 ALWAYS refill the fuel tank in a well-ventilated area.
1.3.9 ALWAYS replace the fuel tank cap after refueling.
1.3.10 ALWAYS check the fuel lines and the fuel tank for leaks and cracks
before starting the engine. Do not run the machine if fuel leaks are
present or the fuel lines are loose.
1.3.11 ALWAYS keep the area around a hot exhaust pipe free of debris to
reduce the chance of an accidental fire.

1.4 Service Safety
Poorly maintained equipment can become a safety hazard! In order
for the equipment to operate safely and properly over a long period of
time, periodic maintenance and occasional repairs are necessary.

1.4.1 ALWAYS replace the safety devices and guards after repairs and
maintenance.
1.4.2 ALWAYS turn engine off and remove key from machine before
performing maintenance or making repairs. This is required to prevent
unintentional remote starting.
1.4.3 ALWAYS secure the articulated steering joint using the locking bar
before lifting, jacking, and servicing the machine. Machine halves
could swing together unexpectedly and cause a serious injury.
1.4.4 ALWAYS replace missing and hard-to-read labels. See Parts Manual
for ordering information.
DANGER
WARNING
RT /... Safety Information
wc_si000080gb.fm 9
1.4.5 ALWAYS make sure slings, chains, hooks, ramps, jacks and other
types of lifting devices are attached securely and have enough weight-
bearing capacity to lift or hold the machine safely. Always remain
aware of the location of other people around when lifting the machine.
1.4.6 ALWAYS keep the area around the muffler free of debris such as
leaves, paper, cartons, etc. A hot muffler could ignite the debris and
start a fire.
1.4.7 ALWAYS replace worn or damaged components with spare parts
designed and recommended by Wacker Corporation.
1.4.8 ALWAYS keep the machine clean and labels legible. Replace all
missing and hard-to-read labels. Labels provide important operating
instructions and warn of dangers and hazards.
1.4.9 DO NOT open hydraulic lines or loosen hydraulic connections while
engine is running! Hydraulic fluid under pressure can penetrate the
skin, cause burns, blind, or create other potentially dangerous
hazards. Set all controls in neutral and turn engine off before loosening
hydraulic lines.
1.4.10 DO NOT attempt to clean or service the machine while it is running.
Rotating parts can cause severe injury.
1.4.11 DO NOT use gasoline or other types of fuels or flammable solvents to
clean parts, especially in enclosed areas. Fumes from fuels and
solvents can become explosive.
1.4.12 DO NOT modify the equipment without the express written approval of
the manufacturer.
1.4.13 DO NOT leave SmartControl transmitter unattended while servicing
machine.
1.4.14 ALWAYS turn the engine off before servicing the machine. If the
engine has electric start, disconnect the negative terminal on the
battery before servicing the machine.
Safety Information RT /...
wc_si000080gb.fm 10
1.5 Label Locations
T
RT /... Safety Information
wc_si000080gb.fm 11
1.6 Warning and Informational Labels
Wacker machines use international pictorial labels where needed.
These labels are described below:
Ref. Label Meaning
A WARNING!
Pressurized contents. Do not open
when hot!
B WARNING!
Hot surface!
C WARNING!
Pinch point
D Hydraulic oil reservoir fill tube
E Radiator/Engine Oil
RADIATOR
KUEHLER
RADIADOR
RADIATEUR
ENGINE OIL
MOTOROEL
ACEITE DE MOTOR
HUILE MOTEURS
wc_sy0154325
Safety Information RT /...
wc_si000080gb.fm 12
F DANGER!
Engines emit carbon monoxide; operate
only in well-ventilated area.
WARNING!
Read and understand the supplied
Operators Manual before operating this
machine. Failure to do so increases the
risk of injury to yourself or others.
WARNING!
To prevent hearing loss, wear hearing
protection when operating this machine.
G WARNING!
Infrared signal: Always aim transmitter
directly at receiving eye on machine.
1. No forward/reverse travel within 1
meter.
2. Machine may receive stray signals if
operated near solid objects.
H CAUTION!
Clean transmitter and receiving ele-
ments prior to operation.
Use only breakaway neck strap pro-
vided by Wacker to avoid possible oper-
ator injury.
I Operators Manual must be stored on
machine. Replacement Operators Man-
ual can be ordered through your local
Wacker distributor.
Ref. Label Meaning
Clean transmitter
and receiving
elements prior
to operation.
Use only breakaway neck strap
provided by Wacker to avoid
possible operator injury.
Nur den von Wacker ausgestatteten
ausloeseschultergurt verwenden,
um moegliche verletzung der
bedienungsperson zu vermeiden.
Solo use la correa al cuello
proporcionada por Wacker para
evitar posibles lesiones al
operador.
Utiliser seulement la bretelle
munie par Wacker pour eviter
blessures eventuelles a
L'utilisateur.
Vor Inbetriebnahme
Sendegert
und Empfnger
reinigen.
Limpie el aparato
emisor-receptor
antes del
funcionamiento.
Nettoyer
l'metteur et le
rcepteur avant
l'opration.
CAUTION
VORSICHT
PRECAUCION
PRECAUTION
RT /... Safety Information
wc_si000080gb.fm 13
J WARNING!
Disconnect battery before servicing.
Read the Operator's Manual.
K Tie-down point
L CAUTION!
Lifting point
M A nameplate listing the model number,
item number, revision number, and
serial number is attached to each unit.
Please record the information found on
this plate so it will be available should
the nameplate become lost or dam-
aged. When ordering parts or request-
ing service information, you will always
be asked to specify the model number,
item number, revision number, and
serial number of the unit.
N This machine may be covered by one or
more patents.
Ref. Label Meaning
Safety Information RT /...
wc_si000080gb.fm 14
O Torque battery hold-down nuts to 3.5
Nm (2.5 ft.lbs.) max.
P CAUTION!
Engine oil may enter the cylinders if
machine tips over, causing possible
engine damage.
Q Guaranteed sound power level in dB(A)
R WARNING!
Pinching hazard. Rotating machinery.
S CAUTION!
Do not stand within 1m (3ft) of the
machine when the amber control lights
are flashing. The roller will respond to
remote signals when the light is flash-
ing.
T Hydraulic oil drain
Ref. Label Meaning
HYDRAULIC OIL
HYDRAULIKL
ACEITE HIDRULICO
HUILE HYDRAULIQUE
RT /... Technical Data
wc_td000077gb.fm 15
2. Technical Data
2.1 Engine
Item No.:
RT 56-SC (0009026),
RT 82-SC (0009025)
Revisions 108 and
lower
RT 56-SC (0009026),
RT 82-SC (0009025)
Revisions 109 and
higher
Engine
Engine Type 3-cylinder, 4-cycle,
liquid-cooled, diesel engine
Engine Make Lombardini
Engine Model LDW 903 LDW 1003
Rated Power
kW (Hp)
15.6 (21.2) @ 3600
rpm
15.5 (20.8) @ 2600
rpm
Alternator
Amp / V
23.8 / 16.5 @ 2600 rpm
Engine Speed - full load
rpm
2600
Engine Speed - idle
rpm
1300
Valve Clearance (cold)
intake:
exhaust:
mm (in.)
0.15 (0.006)
0.20 (0.008)
Air Cleaner
type
Dry pleated paper elements
Battery
V / CCA
12V - Sealed / 800
Fuel
type
No. 2 Diesel
Fuel Tank Capacity
l (gal.)
18.9 (6.3)
Fuel Consumption
l (gal.)/hr.
5.64 (0.67)
Radiator Capacity
l (gal.)
4.75 (1.25)
Technical Data RT /...
wc_td000077gb.fm 16
2.2 Roller
Item No:
RT 56-SC
0009026
RT 82-SC
0009025
Roller
Operating Weight
kg (lb.)
1391 (3068) 1473 (3247)
Area Capacity
m (ft) / hr.
668 (7260) 972 (10560)
Inside Turning Radius
m (in.)
1.9 (73) 1.6 (63)
Travel Speed
m (ft.)/min.
41.66 (136.7) High
20 (65.6) Low
Vibration Frequency
Hz (vpm)
41.7 (2500)
Gradeability with
Vibration
%
50
Gradeability w/o
Vibration
%
45
RT /... Technical Data
wc_td000077gb.fm 17
2.3 Lubrication
Item No:
RT 56-SC
0009026
RT 82-SC
0009025
Lubrication
Engine Crankcase
type
l (qt.)
SAE 15W40 Class CD rated
2.5 (2.5)
Hydraulic System
type
l (gal)
Premium grade, anti-wear hydraulic fluid SAE 10W30
40 (8)
Exciter
type
ml (oz.)
SAE 10W30
950 (32)
Drum Drive Gearcase
type
ml (oz.)
SAE 10W30
370 (12.5)
Articulated Joint
type
qty.
Shell Alvania No. 2 Grease
as required
Steering Cylinder
type
qty.
Shell Alvania No. 2 Grease
as required
Radiator
type
qty. %
Water / Glycol
50 / 50
Technical Data RT /...
wc_td000077gb.fm 18
2.4 Sound and Vibration Measurements
Products are tested for sound pressure level in accordance with EN
ISO 11204. Sound power level is tested in accordance with European
Directive 2000/14/EC - Noise Emission in the Environment by
Equipment for use outdoors.
The sound pressure level at operator's location (L
pA
) = 83 dB(A).
The guaranteed sound power level (L
WA
) = 109 dB(A).
Because this machine is operated using remote control the operator is
not exposed to vibration.
2.5 Dimensions
mm(in.)
RT /... Operation
wc_tx000518gb.fm 19
3. Operation
3.1 Information Regarding Operation
The information regarding the operation of the machine included in this
manual is condensed. Refer to the Operators Manual for complete
operating instructions. Always read, understand, and follow the
procedures in the Operators Manual when operating the machine.
Operation RT /...
wc_tx000518gb.fm 20
3.2 Operation and Service Locations
See Graphic: wc_gr000234 and wc_gr000235
Ref. Description Ref. Description
1 Oil dipstick 25 Exciter fill plug
2 Engine oil drain plug 26 Exciter drain plug
3 Tie-down lugs 27 Exciter oil level plug
4 Air cleaner 28 Display panel
5 Scraper bar 29 SmartControl transmitter
6 Drive case fill plug 30 Charge cable
7 Drive case drain plug 31 Receiving eye/light ring
8 Drive case oil level plug 32 Oil cooler
9 Exciter pump 33 Docking port
10 Drive pump 34 Steering cylinder
11 Radiator 35 Decoder module
12 Hood latch 36 Engine control module
13 Lifting eye 37 Latch
14 Articulated joint locking bar 38 Manual holder
15 Hydraulic tank 39 Hood locking tab
16 Hydraulic tank return line filter 40 System fuse - 20A
17 Hydraulic oil level sight gauge 41 Self-resetting circuit breaker - 50A
18 Hydraulic tank drain plug 42 Charge cord / Service box recepta-
cle
19 Articulated joint grease fitting 43 Oil PSI switch
20 Steering cylinder grease fittings 44 Air filter restriction switch
21 Fuel tank - ---
22 Radiator drain plug 46 High water temperature switch /
Glow plug timer
23 Hydraulic manifold 47 Hood hinge grease fitting
24 Battery
RT /... Operation
wc_tx000518gb.fm 21
Operation RT /...
wc_tx000518gb.fm 22
Ref. Description Ref. Description
1 Oil dipstick 25 Exciter fill plug
2 Engine oil drain plug 26 Exciter drain plug
3 Tie-down lugs 27 Exciter oil level plug
4 Air cleaner 28 Display panel
5 Scraper bar 29 SmartControl transmitter
6 Drive case fill plug 30 Charge cable
7 Drive case drain plug 31 Receiving eye/light ring
8 Drive case oil level plug 32 Oil cooler
9 Exciter pump 33 Docking port
10 Drive pump 34 Steering cylinder
11 Radiator 35 Decoder module
12 Hood latch 36 Engine control module
13 Lifting eye 37 Latch
14 Articulated joint locking bar 38 Manual holder
15 Hydraulic tank 39 Hood locking tab
16 Hydraulic tank return line filter 40 System fuse - 20A
17 Hydraulic oil level sight gauge 41 Self-resetting circuit breaker - 50A
18 Hydraulic tank drain plug 42 Charge cord / Service box recepta-
cle
19 Articulated joint grease fitting 43 Oil PSI switch
20 Steering cylinder grease fittings 44 Air filter restriction switch
21 Fuel tank - ---
22 Radiator drain plug 46 High water temperature switch /
Glow plug timer
23 Hydraulic manifold 47 Hood hinge grease fitting
24 Battery
RT /... Operation
wc_tx000518gb.fm 23
Operation RT /...
wc_tx000518gb.fm 24
3.3 Control Panel
See Graphic: wc_gr001728
The control panel is mounted to the dash under the back hood access
cover of the machine. It contains the following features:
3.3.1 Charging System Light (a)
The engine is equipped with an alternator and voltage regulator to
maintain the battery charge. The charging system warning light
illuminates when there is a malfunction of the system. Although the
machine will run with the light on for a short period of time, continued
operation will drain the battery and eventually cause the machine to
lose all operating functions.
If the system warning light illuminates while operating the machine in
a narrow trench or other confined area, drive machine into a safer area
as soon as possible to avoid stranding it in a hazardous or inaccessible
location.
3.3.2 Glow Plug Light (b)
The engine is equipped with an automatic glow plug system that pre-
heats the combustion chambers to improve normal and cold weather
starts. The glow plug light illuminates when the keyswitch and the
transmitter ON/OFF switch are placed in the l (ON) positions. It will go
off when the combustion chambers are pre-heated.
Note: Allow 5 minutes for the engine to warm up before operating the
roller.
3.3.3 Air Cleaner Light (c)
The air cleaner warning light illuminates when the air filter cartridge
needs to be replaced.

3.3.4 Hour Meter (d)
The hour meter records the actual running time of the engine. Use the
hour meter when planning scheduled maintenance.
CAUTION
RT /... Operation
wc_tx000518gb.fm 25

3.3.5 Engine Oil Pressure Light (e)
The oil pressure warning light illuminates when oil pressure falls below
the engine manufacturer's recommended value. During such a
condition, the engine will automatically shut down.

3.3.6 Coolant Temperature Light (f)
The cooling temperature warning light illuminates when engine coolant
temperature exceeds 230F (110C). During such a condition, the
engine will automatically shut down.
Note: Allow temperature to drop below 212F/100C before attempting
to restart.

3.3.7 Coolant Level Light (g)
The cooling level warning light illuminates when coolant level is too
low. During such a condition, the engine will automatically shut down.
\
3.3.8 Stability Light (h)
The stability warning light illuminates when the pitch of the roller
exceeds 45. The machine is equipped with safety switches that shut
down the engine during such a condition.

3.3.9 Keyswitch (j)
Turning the keyswitch to the I (ON) position supplies power to the
machine. The green power-on indicator (k) illuminates indicating
power is on.
The keyswitch has an automatic shutoff feature that after 1 hour of
non-engine run time, the electronics will power off. To reset the
machine, turn the keyswitch to the O (OFF) position and then back to
the I (ON) position.
Note: The machine can be restarted within this 1-hour period if the
transmitter is turned off and then on. The glow plugs will be activated
if needed.
All shutdown functions have the feature that when a fault is detected,
the warning light and red LED light rings will remain on after the
machine shuts down, until the fault is corrected, and the keyswitch is
turned to the O (OFF) position.
All shutdown functions and the air filter restriction circuit have built-in
circuitry to detect a possible bad sensor, unplugged sensor, or a cut or
damaged wire to the sensor. Whenever any of these sensor faults
occur, the corresponding control panel light will flash on and off.
Operation RT /...
wc_tx000518gb.fm 26
3.4 SmartControl Transmitter
See Graphic: wc_gr001660
Wireless control
Line of sight operation
3 control channels
Clear transmissions into direct sunlight, up to 100,000 LUX
Maximum Range: 14 m (45 ft.)
Transmitting time: 8 hours
Recharge time: 40 minutes
Batteries: Ni-Cad battery pack
The standard operating controls include:
Ref. Description Ref. Description
a Cable connector h Engine START pushbutton
b Infra-red emitting diodes j ON/OFF toggle switch
c Joysticks k LOW vibration pushbutton
d Battery charge indicator
(green LED)
l Vibration OFF pushbutton
e Battery failure indicator (red LED) m HIGH vibration pushbutton
f Power ON indicator (green LED) n Signal transmission indicator
g Charging required indicator
(red LED))
RT /... Operation
wc_tx000518gb.fm 27
3.4.1 Cable connector (a)
The cable connector provides battery charging capabilities.
Transmitter batteries can be recharged using the cord while the engine
is running, or during non-working hours using the docking port.
3.4.2 Infra-red emitting diodes (b)
The diodes are used to transmit the coded infra-red signal to the
receiving eye on the machine. Keep the window in front of the diodes
clean to ensure maximum signal strength.

3.4.3 Joysticks (c)
Two joysticks control low- and high-speed directional motion of the
roller. The left joystick controls left/right motion. The right joystick
controls forward/reverse motion. Move the joysticks in the direction
desired. The roller will change to high speed whenever the right
joystick is placed fully in the forward or fully in the reverse position.

3.4.4 Battery charge indicator (green LED) (d)
When this light is OFF and transmitter is in use, it indicates that the
batteries are charged. If this light is blinking, it indicates that there is
no battery present, that there is an internal failure (Temp sensor), or
that the battery is too hot. When the light is ON (steady), it means the
batteries are being charged through the charging cable or docking
port.

3.4.5 Battery failure LED (red) (e)
This LED illuminates when the battery has failed due to discharge,
damage, or breakdown.
Operation RT /...
wc_tx000518gb.fm 28
3.4.6 Power ON indicator (green LED) (f)
When the ON/OFF toggle switch (j) is in the I (ON) position, this light
blinks, indicating that the SmartControl transmitter is ON and ready
for operation.

3.4.7 Charging required indicator (red LED) (g)
This red LED is used to indicate the capacity of the battery in the
SmartControl transmitter module. When the battery capacity falls to
20% of full charge, the LED will begin to blink, indicating that the
battery needs recharging. At this stage, transmission distance may
begin to diminish. If the battery charge falls to 10% or less, the red LED
changes from a blinking light to a continuously-on light and
transmission is shut off. This avoids possible malfunctions caused by
weak signals.
Light Off: Battery charged
Light Blinks: Battery charge at 20%
Light On: Battery at 10%, machine shuts down.
When the control cable is connected to the SmartControl transmitter,
the battery will automatically charge as needed.
Note: If the transmitter battery is completely discharged, neither the
red LED nor green LED will illuminate.

3.4.8 Engine START pushbutton (h)
Pushing this button causes the engine to crank. An override prevents
the engine from cranking if it is already running.

3.4.9 ON/OFF toggle switch (j)
Placing this switch in the O (forward) position causes the roller to stop
all motion and the engine to shut down.
Placing this switch in the l (backward) position supplies power to the
SmartControl transmitter. In this position, the Power ON indicator
(green LED) (f) illuminates.

3.4.10 Low vibration pushbutton (k)
Pressing this button causes the vibration to come on in LOW.

3.4.11 High vibration pushbutton (m)
Pressing this button causes the vibration to come on in HIGH.

3.4.12 Vibration pushbuttons (k or m)
Pressing either vibration pushbutton will cause the roller to drop out of
high speed travel; conversely, when vibration is on, the roller cannot
go to high speed.
RT /... Operation
wc_tx000518gb.fm 29
When shifting from one vibration mode to the other, the exciter weights
must come to a complete stop and reverse direction. Therefore, a 7-
second delay has been built into the control circuit.

3.4.13 No vibration pushbutton (l)
Pressing this button causes all vibration to stop.

3.4.14 Signal transmission indicator (n)
To aid in diagnostics, this LED blinks any time a signal is sent to the
roller.
Operation RT /...
wc_tx000518gb.fm 30
3.5 Infra-red System and Control Channels
See Graphic: wc_gr003061
The infra-red (IR) system consists of three main components: the
SmartControl
TM
transmitter (a), the receiving eyes (b), and the
decoder module (c).
The receiving eyes are positioned on the top of the machine enclosed
within protective lenses. They receive, filter and amplify the infra-red
transmission. They include:
An integrated pre-amp to strengthen signal input
IR correction, to filter outside light interference
A frequency range of 500 kHz
There is a green LED (d) on the base (bottom) of each eye. When
illuminated, the green LED indicates:
That electric power is being supplied to the eye. The LED
illuminates for the first 12 seconds after power has been applied
(key switch is turned on).
That the eye is receiving a signal from the SmartControl
TM

transmitter module. The LED will remain on during operation.
The decoder module is positioned behind the hydraulic manifold at the
back of the machine. It receives, decodes, and outputs the signal from
the transmitter module. It is also the electric power supply for all
hydraulic solenoids.
The IR system can be set to one of three different control channels.
Using different channels allows multiple rollers to operate in the same
area without interference. Whenever multiple rollers are operated
within 45 feet (14 meters) of one another, make certain each roller and
its accompanying transmitter is set to a different control channel than
the other rollers/transmitters being used within the area.
Channel selection microswitches (e
1
and e
2
) are included on both the
transmitter module and on the decoder module. The microswitches
come from the factory set randomly. For proper operation, BOTH
microswitches must be set to the SAME channel. The channel is
determined by the position of the microswitch.

To change the control channel:
3.5.1 Remove the four screws holding the transmitter module together and
carefully pull it apart. Place the microswitch on the transmitter module
in any of the three positions. Close the box and secure with four
screws.
3.5.2 Place the microswitch on the decoder module in the same position as
that of the microswitch on the transmitter module.
RT /... Operation
wc_tx000518gb.fm 31
3.5.3 To determine if the decoder module and the transmitter module are set
to the same channel, turn the key switch to the ON position and place
the transmitter modules ON/OFF toggle switch in the ON position. The
amber lights on the machines light ring should blink at a slow rate
indicating that the machine is receiving signals from the transmitter
module. If the amber lights illuminate but do not blink, the transmitter
module and the decoder module are not set to the same channel. Try
another position until the LEDs do blink.
3.5.4 Once set, label the control channel setting on both the roller and its
accompanying transmitter.

e
1
e
2
wc_gr003061
c
a
e
2
e
1
d
b
Operation RT /...
wc_tx000518gb.fm 32
3.6 Before Starting
See Graphic: wc_gr0003062
Before starting the machine check the following:
Engine oil level
Hydraulic fluid level
Condition of fuel lines
Condition of air cleaner
Fuel level
Water level
Scraper bars are clean and properly adjusted
Check that the SmartControl
TM
transmitter module and the
machines decoder module are set to the same control channel.
Note: All fluid levels should be checked with the machine on a level
surface.
Ensure that regular maintenance has been carried out.
wc_gr003062
RT /... Operation
wc_tx000518gb.fm 33
3.7 Starting
See Graphic: wc_gr0001662 and wc_gr001727
3.7.1 Place the throttle switch (b) in the idle (slow) positon.
3.7.2 Turn the key switch (a) to the I (ON) position. All lights on the display/
control panel and light ring will illuminate for a 5-second LED test. After
5 seconds, the power ON indicator (h), charge indicator (i), and engine
oil pressure indicator (l) will remain illuminated. The light ring (q) will
have a steady amber color.
3.7.3 Place the SmartControl transmitter ON/OFF toggle switch (d) in the
I (ON) position. Make sure the amber indicator lights in the light rings
(q) are flashing at a slow rate. This indicates infra-red reception and
that the transmitter is at the correct distance from the machine. If they
are not flashing or they are flashing at a fast rate, reposition the
SmartControl transmitter so that they do flash at a slow and steady
rate. If you are operating multiple rollers, check to make certain each
roller and its accompanying transmitter are set to a different control
channel.
3.7.4 After approximately 2 seconds, if engine conditions dictate (coolant
temperature too cool), the glow plug indicator (j) will illuminate
signifying the glow plugs are on. The colder the engine coolant
temperature, the longer the glow plugs and thus, the glow plug
indicator (j) will stay on; approximately 30 seconds at 0C (32F). Do
not start the engine until the indicator light goes out.
Note: A red flashing ring of lights will also come on in the light ring (q)
to indicate the glow plugs are on.
3.7.5 Immediately after the glow plug light (j) and red LED rings (q) go out,
press the engine start button (g) and hold it down until the engine
starts. If the unit fails to start within 20 seconds of cranking, place the
ON/OFF toggle switch in the O (OFF) position. Wait 30 seconds before
going through the start procedure again.
Note: A 30-second wait time is required so the anti-restart cycle can
reset.
3.7.6 Once started and sufficient oil pressure is sensed, the oil pressure
indicator will go out.
3.7.7 Allow the unit to warm up a minimum of 5 minutes before engaging the
throttle switch (b) to the high (fast) position.
Operation RT /...
wc_tx000518gb.fm 34
3.8 Stopping
See Graphic: wc_gr001662 and wc_gr001727
3.8.1 Using the vibration off pushbutton (f), turn vibration off.
3.8.2 Place the throttle switch (b) in the idle (slow) positon.
Note: The engine cannot be shut down using the throttle control alone.
The throttle switch only changes the engine speed from high (fast) to
idle (slow).
3.8.3 Place the transmitter ON/OFF switch (d) in the O (OFF) position to
stop the engine.
3.8.4 Turn the key switch (a) to the O (OFF) position.
Note: The key switch has a built-in shutoff timer. If left in the ON
position when the engine is not running, after one hour, the timer will
shut off the power to the control panel.
A parking brake is located in the rear drum. The brake is connected to
the hydraulic system through the brake valve of the control manifold.
The brake is spring activated and hydraulically disengaged. Hydraulic
oil flow to the brake is enabled as soon as the engine starts. Thus,
when the engine is running, the brake is disengaged; when the engine
is not running, the brake is engaged.
RT /... Operation
wc_tx000518gb.fm 35
3.9 Operation
See Graphic: wc_gr000959
Keep the transmitter pointed at either of the receiving eyes on the
machine to continue operation. The light ring amber LEDs will blink to
show that the machine is receiving signals from the transmitter.
Note: Clean transmitter and receiver eyes prior to operation.
The infra-red system is equipped with an operator distance sensing
system. If the operator is standing within 1 m (3.3 ft) of the machine,
the amber light ring will flash rapidly. The machine will not travel
forward/reverse or vibrate until the operator moves outside this
distance. The amber lights will flash slowly to indicate the machine can
be operated.
Note: The control cable is not needed for using the infra-red system.
The SmartControl transmitter battery can be recharged at the end of
operation by connecting the transmitter receptacle (b) to the battery
docking port (c). See Charging Transmitter Batteries.
The Cable Control System will only charge the transmitter battery if the
control cable is connected to the transmitter receptacle (b) and
plugged into the port (a) in the back of the roller.
Multiple rollers are not to be operated within 45 feet (14 meters) of one
another, unless you are certain you have each roller and its
accompanying transmitter set to a different control channel than the
other rollers/transmitters being used within the area. Refer to section
Setting Control Channels for additional information. Failure to assign
different control channels can, in certain circumstances, cause one
transmitter to inadvertently take control of multiple rollers.
Always use the SmartControl transmitter neck strap provided by
Wacker while operating with the control cable connected. This neck
strap is designed to break away so that the operator will not be
dragged by the machine should the machine slide, tip, or fall.

CAUTION
WARNING
a
c
b
wc_gr000959
Maintenance RT /...
wc_tx000419gb.fm 36
4. Maintenance
4.1 Transporting Machine
See Graphic: wc_gr000980
When transporting the machine, place blocks in front of and behind
each drum and use the tie down lugs (a) provided to securely fasten
the machine to the trailer.
Make sure that the joint locking bar (b) is engaged.
4.2 Lifting Machine
See Graphic: wc_gr000980
Lock front and rear machine halves together using the joint locking bar
(b) at the articulated steering joint on the machine. Use a lifting device
with sufficient weight-bearing capacity. Lift machine from lifting eye (c).
ALWAYS lock the articulated steering joint before lifting the machine.
RT /... Maintenance
wc_tx000419gb.fm 37
4.3 Job Site Storage
See Graphic: wc_gr000983
Never allow the roller to sit overnight in a ditch, trench or other low-
lying area which might fill with water during a heavy rain. Park the roller
on a flat level surface, out of the way of traffic patterns and congestion.
If the roller must be parked on an incline, chock the drums to prevent
any chance of movement.
If leaving the roller on the job site, remember to remove the key and
lock the control panel cover and engine hood to prevent tampering.
Both the front and rear hoods and access cover are equipped with a
locking ring (a) for use with a padlock for this purpose.
If desired, the SmartControl can be removed from the roller and
stored separately.
Maintenance RT /...
wc_tx000419gb.fm 38
4.4 Storage
If storing unit longer than 30 days, the following steps are
recommended:
4.4.1 Change the engine oil.
4.4.2 Clean or change air cleaner elements.
4.4.3 Drain any water that may have collected at the bottom of the fuel tank.
Replace the fuel filter. Refill the tank with fresh No. 2 diesel fuel.
Note: Diesel fuel is subject to bacterial growth which can contaminate
fuel lines. Allowing the tank to sit dry for a long period of time helps
promote such growth. The addition of a biocide to the fuel is
recommended to inhibit bacterial growth and protect the engine fuel
system.
4.4.4 Store the unit indoors in a clean dry area. If the unit must be stored
outdoors, cover it.
4.5 New Machines
Perform initial oil and filter changes as listed below. Follow Periodic
Maintenance Schedules thereafter.
4.5.1 Change engine oil and replace oil filter after first 50 hours.
4.5.2 Replace hydraulic return line filter after first month or 100 hours.
RT /... Maintenance
wc_tx000419gb.fm 39
4.6 Periodic Maintenance Schedules
The chart below lists basic engine maintenance. Refer to the engine
manufacturers Operation Manual for additional information on engine
maintenance.
Roller
Daily
before
starting
Every
100
hrs.
Every
500
hrs.
Once
A
Year
Every
2
Years
Check hydraulic oil. Fill to correct
level.

Clean control box / transmitter.

Grease articulated joint.
Grease steering cylinder.
Grease hood hinges.
Change oil in drive gearcase.
Change hydraulic system return line
filter.

Change hydraulic fluid.

Change exciter oil.
Lombardini Engine
Daily
before
starting
Every
100
hrs.
Every
125
hrs.
Every
250
hrs.
Every
300
hrs.
Every
500
hrs.
Check engine oil. Fill to correct level.
Replace air filter if indicator light is on.
Check condition and tension on fan belt.
Clean engine head and cylinder fins.
Change oil in engine crankcase.
Replace engine oil filter.
Check and adjust fan belt.
Replace fuel filter cartridge.
Clean injectors and check injector pres-
sure.

Replace fan belt.

Check valve clearance.
Maintenance RT /...
wc_tx000419gb.fm 40
4.7 Hydraulic Oil Requirements
Wacker recommends the use of a good petroleum-based, anti-wear
hydraulic oil in the hydraulic system of this equipment. Good anti-wear
hydraulic oils contain special additives to reduce oxidation, prevent
foaming, and provide for good water separation.
When selecting hydraulic oil for your machine, be sure to specify anti-
wear properties. Most hydraulic oil suppliers will provide assistance in
finding the correct hydraulic oil for your machine.
Avoid mixing different brands and grades of hydraulic oils.
Most hydraulic oils are available in different viscosities.
The SAE number for an oil is used strictly to identify viscosityit does
not indicate the type of oil (engine, hydraulic, gear, etc.).
When selecting a hydraulic oil be sure it matches the specified SAE
viscosity rating and is intended to be used as a hydraulic oil. See
Technical DataLubrication.
4.8 Hydraulic Oil Level
See Graphic: wc_gr000979
A hydraulic oil level sight gauge (c) is located on the hydraulic tank
inside the rear section of the machine.
Check that the oil level is within 25 mm (one inch) of the top of the sight
gauge. Add oil as required through the filter housing on top of
hydraulic tank.
If hydraulic oil continually needs to be added, inspect hoses and
connections for possible leaks. Repair hydraulic leaks immediately to
prevent damage to hydraulic components.
RT /... Maintenance
wc_tx000419gb.fm 41
4.9 Changing Hydraulic Oil & Filter
See Graphic: wc_gr000979
Note: In the interests of environmental protection, place plastic
sheeting and a container under the machine to collect the liquid which
drains off. Dispose of this liquid properly.
To change hydraulic oil:
4.9.1 Remove drain plug from bottom of frame and allow hydraulic fluid to
drain.
4.9.2 Clean filter housing cover. Remove cover from the filter housing and
remove the filter element (a).
Be extremely careful to avoid dropping anything into the filter housing
while cover is off.
4.9.3 Install drain plug.
4.9.4 Fill hydraulic tank through filter housing (b) using clean hydraulic fluid.
4.9.5 Install new filter element (a) as shown in illustration. Replace housing
cover.
CAUTION
Maintenance RT /...
wc_tx000419gb.fm 42
4.10 Articulated Joint, Steering Cylinder, and Hood Hinges
See Graphic: wc_gr001665
Lubricate top and bottom bearing blocks (a), cylinder knuckles (b), and
hood hinges (d) every 100 hours using a hand-held grease gun.
Cylinder knuckles can be accessed through holes on side of machine
(c).
Use Shell Alvania No. 2 or an equivalent No. 2 general purpose
grease.
4.11 Cleaning SmartControl Transmitter
The transmitter and switches are completely sealed to keep dust and
moisture out; however, contact with water should be kept to a
minimum. Even a small amount of moisture can cause connections
and contacts to corrode. Avoid immersing transmitter in water and do
not clean using a pressure wash.
To clean the transmitter:
4.11.1 Wash off the transmitter using a damp cloth. Allow it to air dry.
4.11.2 To remove dirt and dust trapped around switches, use low-pressure
compressed air.
RT /... Maintenance
wc_tx000419gb.fm 43
4.12 Drive Gearcase
See Graphic: wc_gr000479
Any disassembly of the drive gearcase should be done on the opposite
side of machine from that shown in graphic wc_gr000479.
Change the oil in the drive gearcase once a year or every 500 hours of
operation.
Note: In the interests of environmental protection, place plastic
sheeting and a container under the machine to collect the liquid which
drains off. Dispose of this liquid properly.
To change the oil:
4.12.1 Remove drum from drivecase side of machine. On the front drum this
will be on the left side, on the rear drum it is the right side.
4.12.2 Open fill plug (c) for venting and then remove drain plug (b) from
bottom of drum assembly.
4.12.3 Install drain plug and remove level plug (a) from gearcase.
4.12.4 Add SAE 10W30 oil through fill plug opening until oil flows out of level
plug opening, approximately 12.5 oz. (370 ml).
4.12.5 Replace plugs and install drum.
CAUTION
Maintenance RT /...
wc_tx000419gb.fm 44
4.13 Exciter Lubrication
See Graphic: wc_gr000975
The exciter is a sealed unit and under normal conditions should not
require any periodic maintenance; however, an oil change once every
two years is recommended to ensure bearing life.
Exciter maintenance should be done on the right front drum and left
rear drum only.
Changing the exciter oil requires special tools and should be
performed by an experienced mechanic.
Ref. Note
a Oil fill plug
b Oil drain plug
c Oil level plug (Maintain oil at this level.)
CAUTION
RT /... Maintenance
wc_tx000419gb.fm 45
4.14 Scrapers
See Graphic: wc_gr000976
Scraper bars are provided on all four drums to prevent dirt from
building up on the drum surfaces. These scrapers should be inspected
and adjusted as required to remove as much dirt from the drums as
possible.
To adjust a scraper:
Loosen the three screws (a) holding each scraper to the drum casting.
Position the scraper 1/81/4" (36 mm) from the drum. Tighten screws
and run machine to check that the scraper does not rub against the
drum surface.
4.15 Shockmounts
See Graphic: wc_gr000978
Inspect the drum shockmounts (a) every 300 hours for cracking,
splitting or tearing. Replace shockmounts as needed.
CAUTION: The shockmounts isolate the upper part of the machine
from the heavy vibrations produced in the drums. Operating the
machine with damaged shockmounts for an extended period of time
may eventually damage other machine parts.
Maintenance RT /...
wc_tx000419gb.fm 46
4.16 Changing Drums
See Graphic: wc_gr000981
The drums can be changed to adjust the working width of the machine.
Drums are available in two standard sizes that provide a working width
of 560 mm (22 in.) or 820 mm (32 in.).
To change drum:
4.16.1 Lock the articulated joint.
4.16.2 Remove scraper bars.
4.16.3 Use a screw jack, hoist or other type of lifting device to lift drums 25
50 mm (12 inches) off the ground. Lift only one end of the machine.
Keep the other end in contact with the ground for stability.
4.16.4 Use a 22 mm wrench and remove the six screws which hold the drum
to the drum support.
4.16.5 Remove the three plugs (a) covering the pusher holes.
4.16.6 Insert three of the mounting screws into the pusher holes and thread
them in evenly to push drum off.
4.16.7 Install new drum and fasten to support. Secure mounting screws with
a medium-strength threadlocking adhesive.
4.16.8 Replace pusher hole plugs. Install the correct size scraper bars.
RT /... Maintenance
wc_tx000419gb.fm 47
4.17 Battery
The battery supplied on this machine is rated at 12V with 800 Amp cold
cranking capacity. It features a sealed, ventless design, and is
constructed to resist vibration and provide longer service life.
DO NOT use automotive-type batteries on this machine. Automotive-
type batteries are not designed to withstand the heavy vibration
produced by this machine. The case on automotive-type batteries
could fail, causing battery acid to leak.
Inspect battery periodically. Keep battery terminals clean and
connections tight.
Maintain the battery at full charge to improve cold weather starting.
CAUTION: Observe the following to prevent serious damage to the
machines electrical system:
Never disconnect the battery with the machine running.
Never attempt to run the machine without a battery.
Never attempt to jump-start a machine.
In the event that the machine has a dead battery, either replace
the battery with a fully charged battery or charge the battery
using an appropriate battery charger.
Explosion hazard. Batteries can emit explosive hydrogen gas. Keep all
sparks and flames away from the battery. Do not short-circuit battery
posts. Do not touch the machine frame or the negative terminal of the
battery when working on the positive terminal.
CAUTION
WARNING
Maintenance RT /...
wc_tx000419gb.fm 48
4.18 Engine Oil System
See Graphic: wc_gr000971
Check the engine oil level daily. Add oil as required.
To check oil:
Place the machine on a level surface, remove the dipstick and check
that the oil level is at the top mark. Add oil through the oil filler cap (a)
on top of engine, checking occasionally with dipstick; DO NOT overfill.
Suggested oil grades:
Use only diesel engine oil API service rating CD or equivalent.
RT /... Maintenance
wc_tx000419gb.fm 49
4.19 Engine Oil and Filter
See Graphic: wc_gr000971
Change oil and oil filter (b) every 125 hours. On new machines,
change oil after first 50 hours of operation. Drain oil while engine is still
warm.
Note: In the interests of environmental protection, place plastic
sheeting and a container under the machine to collect the liquid which
drains off. Dispose of this liquid properly.
To change oil:
4.19.1 Remove oil filler cap (a) and oil drain plug (c). Drain oil into a suitable
container.
4.19.2 Reinstall the drain plug and tighten.
4.19.3 Remove and replace oil filter (b).
4.19.4 Remove oil filler cap (a) and fill engine crankcase with recommended
oil. See Technical Data for oil quantity and type.
4.19.5 Install oil filler cap.
Maintenance RT /...
wc_tx000419gb.fm 50
4.20 Air Cleaner
See Graphic: wc_gr000968
Replace the air filter cartridge when the air filter warning light
illuminates. See Section Control Panel Features.
The air cleaner assembly contains a one-piece single element air filter
cartridge (a).
To replace the air filter cartridge:
4.20.1 Remove the end cover (b), then discard the entire air filter cartridge.
4.20.2 Insert a new air filter cartridge, then:
4.20.3 Re-install the end cover, making sure that the dust cap (c) is clean and
is pointing downward.
Periodically, make sure the inlet pipe (d) is free from obstructions.
Check all connections and make sure they are snug. An air leak at the
neck clamp or intake pipe can quickly lead to expensive engine
repairs.
Make sure that the intake piping (e) is fully engaged over the neck
of the filter to ensure a good seal.
If the filter housing, neck, or inlet pipe are crushed or damaged,
replace them immediately.
CAUTION
RT /... Maintenance
wc_tx000419gb.fm 51
4.21 Engine Fuel Delivery System Maintenance
Maintenance to the engine fuel delivery system should be performed
by an experienced mechanic familiar with diesel engines. For detailed
maintenance procedures on the engine fuel system, refer to the engine
manual supplied with the machine at the time of shipment.
4.22 Fuel Filter
See Graphic: wc_gr000973
Change engine fuel filter every 300 hours of operation.
To change fuel filter:
4.22.1 Remove filter (a) from engine block.
4.22.2 Install new filter. If necessary, prime fuel lines as described in next
section.
Maintenance RT /...
wc_tx000419gb.fm 52
4.23 Priming the Fuel System
See Graphic: wc_gr000973
If the fuel tank has been run completely dry or drained for service, it will
be necessary to manually prime the fuel system.
To prime the fuel system:
4.23.1 Turn both the key switch on the machine, and the on-off switch on
control box, on. This will open the fuel valve.
4.23.2 Loosen the bleed screw on the fuel filter and pump the lever on the fuel
pump (b) until fuel flows freely from the bleed screw. Tighten the bleed
screw.
4.23.3 Repeat this procedure for the fuel line bleed screw (c).
4.24 Engine Coolant
Check the coolant level of the radiator daily while the engine is cold
The coolant level should be at the cold level mark (lower line) on the
overflow bottle. Add coolant in a 50% water/50% glycol mixture if
required.
NEVER remove the radiator cap or drain plug while the engine is hot!
Pressurized coolant can cause serious burns.
If it is necessary to open the radiator, only do so with the engine off,
and only when coolant is cool enough to touch with bare hands. Slowly
loosen cap to relieve pressure first, before removing it completely.
WARNING
RT /... Maintenance
wc_tx000419gb.fm 53
4.25 Valve Clearances
See Graphic: wc_gr002366
Check and adjust valve clearance every 500 hours. Set clearance with
engine cold. Replace the valve/rocker arm cover gasket when
checking the valve clearances. Refer to the engine manufacturers
service manual for detailed information.
To adjust valve clearances:
4.25.1 Remove valve/rocker arm cover
4.25.2 Bring each cylinder piston to top dead center on the compression
stroke and set clearance.
4.25.3 Valve clearance (A): 0.20mm (0.008 in.).
Valve clearance (B): 0.15mm (0.006 in.).
4.25.4 Clean gasket material from cylinder head.
4.25.5 Place a small bead of RTV Silicone on cylinder head to secure ends of
new gasket. Gently place gasket on cylinder head.
4.25.6 Replace valve/rocker arm cover. Torque bolts to 9 Nm (7 ft.lbs.).
wc gr002366
Maintenance RT /...
wc_tx000419gb.fm 54
4.26 Adjusting Engine Fan Belt
See Graphic: wc_gr002377
4.26.1 Remove the hydraulic oil cooler. See Section Replacing Hydraulic Oil
Cooler.
4.26.2 Remove radiator and shroud. See Section Replacing Radiator and
Shroud.
4.26.3 Remove the four screws (a) securing the fan to the engine and remove
the fan.
4.26.4 Remove the outer pulley plate (b).
4.26.5 Insert the appropriate amount of shims (c) to give you the required
tension on the belt. The fewer the number of shims, the tighter the belt
will be. Approximately 612 mm (1/41/2 in.) deflection is
recommended.
4.26.6 Place unused shims between outer pulley plate and fan when
reinstalling the fan. Secure the fan to the engine with the four screws
(a).
RT /... Maintenance
wc_tx000419gb.fm 55
Maintenance RT /...
wc_tx000419gb.fm 56
4.27 Wiring Schematic
RT /... Maintenance
wc_tx000419gb.fm 57
wc_gr003353
Maintenance RT /...
wc_tx000419gb.fm 58
4.28 Basic Troubleshooting
Problem / Symptom Reason / Remedy
ENGINE DOES NOT START Fuel tank empty. Fill with No. 2 diesel fuel and prime
fuel lines.
Wrong type of fuel.
Old fuel. Drain tank, change fuel filter and fill with
fresh fuel.
Fuel system not primed.
Fuel filter restricted or plugged. Replace filter.
Battery connections loose or corroded. Battery
dead.
Engine oil level too low.
Air cleaner element plugged.
Starter motor defective.
Starter button on control box or transmitter defective.
Fuel valve solenoids on engine inoperative.
Starter relay inoperative.
Electrical connections loose or broken.
Machine out of infrared signal range.
ENGINE STOPS BY ITSELF Fuel tank empty.
Fuel filter plugged.
Fuel lines broken or loose.
Machine out of infra-red range.
NO VIBRATION Machine in high speed travel mode.
Defective switch or poor connection in control box or
transmitter.
Solenoid on vibration valve inoperative.
Exciter assembly damaged.
Exciter motor coupling damaged.
Exciter motor damaged.
Exciter pump damaged.
RT /... Maintenance
wc_tx000419gb.fm 59
NO TRAVEL or TRAVEL
ONLY IN ONE DIRECTION
Defective switch or poor connection in control box or
transmitter.
Solenoid on travel valve inoperative.
Drive gearcase assembly damaged.
Loose, broken or corroded wire connections.
Drive motor damaged.
Drive pump damaged.
NO HIGH SPEED TRAVEL Defective switch or poor connection in control box or
transmitter.
Solenoid on manifold inoperative.
Loose, broken or corroded wire connections.
Exciter pump worn or damaged.
Vibration is turned on.
NO STEERING Defective switch or poor connection in control box or
transmitter.
Solenoid on steering valve inoperative.
Loose, broken or corroded wire connections.
Steering cylinder damaged.
Locking bar is engaged.
Problem / Symptom Reason / Remedy
Engine Starting Troubleshooting RT SC Repair
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5. Engine Starting Troubleshooting
5.1 Component Locations

Ref. Description Ref. Description
a Fuel rail input line e Self-resetting, 50A circuit breaker
b Power relay f Glow plug wiring
c Throttle relay g 20A Fuse
d Glow plug relay -- --
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5.2 Troubleshooting Flowcharts
The troubleshooting flowcharts are designed to step you through the
process of determining the source of a problem with starting the engine
should a problem exist. Many of the tests involve live voltages and
therefore should only be attempted by qualified personnel. The
procedures for carrying out the tests are included in this manual. Each
flowchart includes references (by section number) to the location of the
specific procedure(s) in the manual.
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wc_tx000430gb.fm 62
5.3 Engine Does Not CrankFlowchart 1A

Check positions of keyswitch
and control box ON/OFF switch.
Place switches in
correct positions.
Are
switches in correct
positions?
Yes
No
Replace/rebuild
control button
card.
Is
button functioning
properly?
No
Is
signal being
transmitted?
No
Yes
Does
machine crank?
Yes
Recharge/
replace battery.
Does
battery measure
1113V?
Yes
No
No
Yes
Check charge of machine battery.
Replace
20A fuse.
Is
20A fuse
OK?
Yes
No
Recharge
control box
battery.
Is
control box battery
charged?
Check channel consistency
between control box and machine.
Synchronize
channels.
Are both
set to the same
channel?
Yes
Yes
No
See Flowchart 1B
wc_gr003240
No
Checking 20A fuse
Check condition of 20A fuse.
Checking starter circuit at trailer plug
Check function of starter circuit
with jumper at trailer plug.
Checking receiving eyes
Check transmission of infrared
signal from box to machine.
Yellow LEDs should be flashing
and green LED on back of eye
should be lit.
Checking NiCad battery charge
Check charge of control box
battery.
Removing & testing control
button circuit board
Check function of starter
button.
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Flowchart 1B
Check continuity of black
wire to starter solenoid.
Is there
12V on black
wire?
No
Yes
Is there
12V on pink
wire?
No
Yes
Does wire
have continuity?
No
Yes
Continued from Flowchart 1A
wc_gr003241
Replace
starter.
Replace
the ECM.
Call Wacker
Service.
Call Wacker
Service.
Check function of starter solenoid.
Check function of keyswitch.
Is
solenoid functioning
properly?
Yes
No
Check for 12V on pink wire
from keyswitch to ECM.
Check continuity of pink wire
from keyswitch to ECM.
Refer to Lombardini repair
manual for starter motor
repair/replace procedures.
Call Wacker Service.
Repair/replace
wire.
Does wire
have continuity?
Yes
No
Repair/replace
keyswitch.
Is
keyswitch functioning
properly?
Yes
No
Checking power to starter solenoid
Place key switch in ON position.
Remove black wire from starter
solenoid. Check for 12V on wire
when start button is pressed.
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5.4 Checking 20A Fuse
See Graphic: wc_gr002211

The 20A fuse (b) in the keyswitch circuit is located in the front section
of the machine as shown. It is enclosed in a plastic protective
enclosure. Remove the enclosure cover to access the fuse.
5.5 Checking Starter Circuit at Trailer Plug
See Graphic: wc_gr002335

The functions of the decoder and ECM can be tested at the trailer plug.
Testing at the trailer plug by-passes the control box and aids in
determining if the control box is functioning properly.
To test the crank circuit:
5.5.1 Place the keyswitch in the ON position.
5.5.2 Attach a jumper wire across pins 1 and 3 for two seconds.
If the engine cranks with the jumper wire but not through the control
box, the problem lies within the control box.
If the engine does not crank with the jumper wire, the problem could be
in the decoder module or its wiring. Check power to and from decoder
module, then continue testing the start circuit if necessary.
wc_gr002335
4
1
8
7
5
3 2
6
9
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5.6 Checking Receiving Eyes
See Graphic: wc_gr002179

To check infrared transmission between receiving eyes and control
box:
5.6.1 Turn both the machine and the control box ON.
5.6.2 Position the control box within 20 m (65 feet) of the machine. The
amber LEDs of the light ring should flash on and off. They will flash
rapidly when the control box is held too close to the machine. The
amber LEDs will not flash when the control box is held further away
than 20 m (65 feet); instead, the amber LEDs will remain illuminated.
5.6.3 If the amber LEDs do not flash, try several different positions until they
do flash. Also check the charge of the NiCAD battery and the function
of the starter button. If the amber LEDs still dont flash, open the hood
and check the green LED (a) on the back of the light ring. If the
receiving eye is receiving a signal, the green LED will illuminate.
5.6.4 If the green LED is not illuminated, check the wiring between the
receiving eye and the decoder module for continuity. Replace the
wiring if no continuity is measured.
If neither receiving eye is functioning, disconnect one of the receiving
eyes and check if the other now operates. If it does, replace the non-
functioning eye. Check each eye in this manner.
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5.7 Replacing Receiving Eye/Light Ring
See Graphic: wc_gr002344
Removal:
5.7.1 Cut the wire tie (a).
5.7.2 Disconnect the wiring connectors (b & c).
5.7.3 Remove the four screws (d) securing the light ring to the cover. Take
note that the left hand side screws are longer and with two lock nuts
(e), are used to secure the latch. After the screws are removed, the
receiving eye/light ring assembly may be removed from the machine.
To separate the receiving eye (f) from the light ring (g):
5.7.4 Lift off the outer securing ring (h) and the globe (i).
5.7.5 Remove the plastic nut (j) and the two components may be separated.
Installation:
5.7.6 Insert the receiving eye (f) through the light ring (g) and secure them
together using the plastic nut (j).
5.7.7 Add the globe (i) and the securing ring (h).
5.7.8 Insert the wiring through the cover and secure the assembly with the
four screws (d). Use the longer screws on the left hand side; the
shorter on the right.
5.7.9 Open the cover and reconnect the wiring (b & c).
5.7.10 Secure the hood latch with the two lock nuts (e).
5.7.11 Secure the wiring with a wire tie (a).
Note: The LED light ring does not have to be connected for the
receiving eye to function. The LED light ring is merely an indicator.
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Engine Starting Troubleshooting RT SC Repair
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5.8 Checking Power to Starter Solenoid
See Graphic: wc_gr002180
To check power to starter solenoid:
5.8.1 Turn keyswitch to ON position.
5.8.2 Place control box ON/OFF switch to the ON position.
5.8.3 Disconnect the black wire (a) to the starter solenoid. Press the crank
button on the control box and check the wire for 12V.
If 12V is measured on the black wire, check function of starter
solenoid. Refer to Lombardini repair manual for starter replacement
procedures.
If 12V is not measured, check the wire for continuity. If the wire has
continuity, continue.
5.8.4 Check the pink wire (b) from the keyswitch to the ECM for 12V.
If 12V is measured on the pink wire at the ECM and not on the black
wire, the problem is in the ECM. See Section Testing ECM. Call
Wacker Service before replacing the ECM.
If 12V is not measured on the pink wire, check the wire for continuity.
If the wire has continuity, continue.
5.8.5 Check function of keyswitch. Remove screws (c), remove connector
(d), place the switch in the ON position and test the switch for
continuity.
If the keyswitch is not functioning properly, replace it.
If the keyswitch is functioning properly, call Wacker Service.
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Engine Starting Troubleshooting RT SC Repair
wc_tx000430gb.fm 70
5.9 Replacing Keyswitch
See Graphic: wc_gr002210

Removal:
5.9.1 Turn machine OFF and disconnect battery.
5.9.2 Remove screws securing faceplate and pull faceplate from machine.
5.9.3 Disconnect plug (a) from back of keyswitch (b).
5.9.4 Remove retaining nut (c) and spacer and remove keyswitch.
Installation:
5.9.5 Secure keyswitch (b) to faceplate with spacer and retaining nut (c).
5.9.6 Connect plug (a) to keyswitch.
5.9.7 Secure faceplate to machine.
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5.10 Checking NiCad Battery Charge
See Graphic: wc_gr002336

To check the charge of the NiCad battery, remove the battery and
check for voltage as shown. A fully charged battery will have a
minimum of 7.2 Volts.
To charge the battery:
5.10.1 Plug the transmitter box into the charging jack on the machine for a
minimum of 40 minutes. When doing so, check that the green charging
LED illuminates, indicating that a good connection has been made.
Note: The charge connector is always on and connected to the
machines 12V battery.
5.10.2 The low battery charge LED will flash red when the battery needs to be
recharged. A battery will need to be recharged when it reaches
approximately 6.5Vdc.
5.10.3 Replace the battery when it is only able to operate for three or four
hours.
Do not allow a discharged battery to sit in the transmitter box.
Discard the battery if it shows signs of leaking.

Engine Starting Troubleshooting RT SC Repair
wc_tx000430gb.fm 72
5.11 Engine Cranks But Does Not StartFlowchart 2A
Check condition of
fuel filter; replace
if necessary.
If air is present in
fuel, check condition
of fuel hoses and
clamps. Then, bleed
the fuel system.
Does fuel
squirt out during
cranking?
No
Refer to
Lombardini repair
manual for fuel
system repairs.
Yes
Replace
glowplug.
Is
glow plug
OK?
No
Yes
Is
there 12V on
wire?
Yes
No
Replace
circuit breaker
Is
circuit breaker
OK?
No
Yes
Refer to Lombardini repair manual.
Investigate the following:
Fuel Injectors
Valves
Injection timing
Piston
Governor linkage
Cylinder head gasket
Cylinder and piston
See Flowchart 2B.
wc_gr003242
Checking fuel flow at fuel rail inlet
Remove fuel line at fuel rail and
check for flow.
Checking 50A circuit breaker
Check condition of the 50A
circuit breaker.
Checking power to glow plugs
Check pink wire at glow
plugs for 12V during cranking
Checking glow plugs
Check condition of glow plug.
Check fuel level, engine oil level
and condition of air filter. Fill fuel
tank with fresh fuel, add oil, and
change air filter as needed.
RT SC Repair Engine Starting Troubleshooting
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Flowchart 2B
Check continuity of pink/red wire
between ECM and glow plug relay.
Check connection and
continuity of brown
wire to engine ground.
Repair/replace
wire.
Is
there 12V on
the wire?
Replace
glow plug relay.
Yes
No
Is
there 12V on
the wire?
No
Yes
Does
wire check
OK?
No
Yes
Continued from Flowchart 2A.
wc_gr003243
Replace/repair
wire.
Check for 12V at pin 11 of
ECM during cranking cycle.
Is
there 12V on
the pin?
No
Yes
Call Wacker Service.
See Section
Testing ECM
Checking relay wiring
Check pink/red wire at
glow plug relay for 12V.
Confirming a malfunctioning relay
Confirm relay fault by checking
for 12V across contacts 30 and
87 during cranking. If 12V is
measured, relay is OK.
Engine Starting Troubleshooting RT SC Repair
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5.12 Checking Fuel Line at Fuel Rail Inlet
See Graphic: wc_gr002212

5.12.1 Have a container ready to catch fuel. Remove the fuel line (a) at the
rail inlet.
5.12.2 With the keyswitch and the control box ON/OFF switch in the ON
positions, press the engine crank button and observe the fuel line. Fuel
should flow from the fuel line.
If fuel does not flow from line, check for a clogged fuel filter or fuel lines.
If air is in the fuel stream, check fuel lines and clamps. Then, bleed the
fuel system.
If you still have no flow, refer to the Lombardini repair manual.
5.13 Checking 50A Circuit Breaker
See Graphic: wc_gr002213

Burn hazard. The 50A circuit breaker can be hot to the touch. Allow the
circuit breaker to cool before handling it.
The 50A circuit breaker (b) in the starter solenoid circuit is located in
the front section of the machine mounted on the left side of the engine.
It is a self-resetting-type circuit breaker and is enclosed by a red rubber
boot. The circuit breaker is tripped by heat and automatically resets
itself once cool. When cool, a working 50A circuit breaker will have 12V
incoming and 12V outgoing. If you measure less than 12V outgoing,
replace the 50A circuit breaker.
CAUTION
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5.14 Checking Power to Glow Plugs
See Graphic: wc_gr002214

The pink (power) wire (a) runs to the glow plugs as shown. Check the
wire for 12V. If 12V is not measured, check the continuity of the wire
and replace or repair the wire as needed.
5.15 Checking Glow Plugs
See Graphic: wc_gr002033

5.15.1 Remove the glow plug from the engine.
Burn hazard. Glow plugs can reach temperatures up to 1200F
(649C). Do not touch the element of the glow plug. Be extremely
careful when testing the glow plug.
5.15.2 Using 10-gauge wire, apply 12VDC to the glow plugpositive on the
upper portion and ground the base. If the glow plug does not heat
(glow) within five seconds, replace the glow plug.
Note: If any one of the glow plugs needs replacing, replace all of them.
WARNING
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wc_tx000430gb.fm 76
5.16 Checking Relay Wiring
See Graphic: wc_gr002215

5.16.1 Turn the keyswitch and the control box ON/OFF switch to the ON
positions. When checking the glow plug relay, do so immediately after
turning the ON/OFF switch to the ON position during the glow plug
warm-up period.
5.16.2 Slide the connector (a) down the spade of the relay just enough to
allow a multimeter probe to contact the spades. Or, remove the
connector completely.
5.16.3 Check for 12V between the connector power lead and ground. The
power lead will be the pink wire with striping: pink/red on glow plug
relay, pink/green on throttle relay, and pink/gray on power relay.
If 12V is not measured, check the wire for continuity and repair or
replace the wire as needed.
Also check that the brown wire(s) provide a good ground for the relay.
Check the brown wire(s) for continuity. Repair or replace the wires as
needed.
5.16.4 If the wire continuity is OK and 12V is still not measured, the problem
lies within the ECM (engine control module) or the wiring to the ECM.
Check the power into the ECM.
RT SC Repair Engine Starting Troubleshooting
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5.17 Confirming a Malfunctioning Relay
See Graphic: wc_gr002330

If the power lead to the relay measures 12 Volts and the brown wire to
the relay supplies a good ground, confirm the relay is malfunctioning
by:
5.17.1 The power (a), throttle (b), and glow plug relays (c) are identical.
Temporarily exchange the suspect relay (power, throttle, or glow plug)
with one known to be working (throttle or glow plug). Do not disconnect
the power relay and use it as a test relay. The power relay is required
for all functions.
5.17.2 Place the keyswitch and the control box ON/OFF switch in the ON
positions. If testing the throttle relay, press the throttle switch.
If the function (glow plug, throttle, or power) works with a known-to-be-
working relay, the suspect relay is bad; replace it.
Alternative method:
5.17.3 Disconnect the relay in question.
5.17.4 Place a jumper (d) across the connector as shown and check if the
function works (power, throttle, or glow plugs). If the function works
with the jumper in place, the relay is bad; replace it. Power to the
throttle relay is only momentary. Repeat test if necessary.
Note: Simply listening for the relay to click when power is supplied to
it, is not an adequate test.

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wc_tx000430gb.fm 78
5.18 Testing ECM
An overall test of the ECM can be made by checking for battery voltage
to the following components during the conditions listed. If battery
voltage is not found, the ECM is faulty.
Note: These tests assume that there is power to the ECM (key switch
and control box ON/OFF switch in the ON positions), that all wire
connections are tight, and that all wires have continuity. Check all
connections and wiring before conducting these tests.
Table 1:
Battery Power (12V) at Component Conditions
Power relay connectorpink/grey wire Always
Throttle holdpink/purple wire Always
Glow plug relay connectorpink/red wire During glow plug timer cycle immediately
after machine is switched on.
Throttle relay (pull)pink/green wire Momentarily whenever the throttle switch is
placed in the fast position.
Starter solenoidblack wire Only when the engine crank button is
pressed.
Fuel solenoidyellow/tan wire Always
RT SC Repair Engine Starting Troubleshooting
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5.19 Checking Fuel Solenoid
See Graphic: wc_gr002343

To check the condition of the fuel solenoid, remove the wire (a) from
the fuel solenoid and check its resistance. A functioning solenoid
should measure 17.8 Ohms. The solenoid will draw 0.5 Amps.

Engine Starting Troubleshooting RT SC Repair
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5.20 Replacing Battery
See Graphic: wc_gr002367
Removal:
5.20.1 Remove the nut (a) securing the air cylinder to the hood. This allows
enough room to lift the battery up and out of the compartment.
5.20.2 Remove the two clamp nuts (b) from the rods (c). Remove the clamp
(d) and pull the battery from the frame.
Installation:
Note: Do not connect the battery until all installation steps are
complete.
5.20.3 Place the battery into the machine.
5.20.4 Secure the battery to the frame using clamp (d), rods (c) and clamp
nuts (b).
5.20.5 Reconnect the air piston with nut (a).
5.20.6 Reconnect the battery.
CAUTION: Be certain to connect the battery leads to the correct
terminals of the battery. Incorrect connections may damage the ECM
and other electrical components.
a
d b
c
wc_gr002367
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5.21 Replacing Trailer Plug
See Graphic: wc_gr002345
Removal:
5.21.1 Disconnect and remove the battery.
5.21.2 Remove the four screws (a) and lock nuts (b) securing the trailer plug
(c) to the frame.
5.21.3 Disconnect the wiring harness from the decoder module at the brown
connector.
Installation:
5.21.4 Secure the trailer plug (c) to the frame with the four screws (a) and lock
nuts (b).
5.21.5 Connect the wiring harness to the decoder module.
5.21.6 Re-install the battery.
Engine Starting Troubleshooting RT SC Repair
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Notes:
RT SC Repair Hydraulic System
wc_tx000418gb.fm 83
6. Hydraulic System
See Graphic: wc_gr000990
Pressure in the hydraulic system is generated by two gear pumpsthe
drive pump (4) and the exciter pump (6). Both pumps provide 6 gpm
(24 lpm). The exciter pump is driven by the engines crankshaft, while
the drive pump is driven by the engines camshaft.
A control manifold (8) directs oil flow from the pumps to the motors and
steering cylinder. The control manifold is mounted beneath the control
panel at the rear of the machine. It consists of the main block; exciter
vibration (7), travel (14), high-speed travel (15), brake (2), and
steering (12) valves. All valves are solenoid operated. During
operation, the solenoids respond to the electrical signals being
transmitted by the operator from the control box. There are four relief
valves in the control block: the exciter relief valve limits pressure to
3500 psi (24 mPa); the brake relief valve is set at 90 psi (620 kPa);
drive pressure relief valve is set at 3000 psi (21 mPa); and the steering
circuit relief is set at 1000 psi (7 mPa).
Oil from the hydraulic tank flows through a suction strainer (13) before
it is drawn into the pump suction ports. The suction strainer is mounted
in the tank and is magnetic for removing metal particles. Hoses
connect the output ports of the pumps to the main block on the control
manifold. The main manifold directs oil flow into the vibration and travel
valves. These valves in turn supply hydraulic pressure to operate the
exciter and drive motors.
When operating in low-speed travel, the exciter pump is used to
operate the exciter motors (5) and the drive pump is used to operate
the drive motors (3). When operating in high-speed travel, the vibration
valve and high-speed valve redirect exciter pump oil flow away from
the exciter motors to the drive motors. During high-speed travel the
exciter motors do not operate. The machine may travel in high speed
both forward and reverse.
Return oil from the drive circuit flows to the steering valve (12) which
directs it to the steering cylinder (11).
The hydraulic system is protected by an oil cooler (9) and return line
filter (10). The return line filter removes particles down to 10 microns
and includes a by-pass in case the filter should plug.
A parking brake (1) is located in the rear drum. The brake is connected
to the hydraulic system through the brake valve of the control manifold.
The brake is spring activated and hydraulically disengaged. Hydraulic
oil flow to the brake is enabled as soon as the engine starts. Thus,
when the engine is running, the brake is disengaged; when the engine
is not running, the brake is engaged.
Refer to the circuit diagrams included in this chapter.
Hydraulic System RT SC Repair
wc_tx000418gb.fm 84
6.1 Hydraulic Manifold
12 10 9
4
1
2
3
13
14
11
5
6
(6)
7
wc_gr003248
241 bar
3500 psi
6.2 bar
90 psi
207 bar
3000 psi
69 bar
1000 psi
8
RT SC Repair Hydraulic System
wc_tx000418gb.fm 85
6.2 Hydraulic Valves
See Graphic: wc_gr003248

6.3 Hydraulic System Pressures
Ref. Valve Description Ref. Valve Description
1 High speed drive 8 Counter balance relief A
2 Brake 9 Drive relief (207 bar/3000 psi)
3 Steering 10 Brake relief (6.2 bar/90 psi)
4 Steering relief (69 bar/1000 psi) 11 Check valve
5 Counter balance relief B 12 Exciter relief (241 bar/3500 psi)
6 Reverse drive 13 Low vibration
7 Forward drive 14 High vibration
Operating Pressure
bar (psi)
Relief Pressure
bar (psi)
Drivelow speed
83 (1200) 207 (3000)
Drivehigh speed
103 (1500) 207 (3000)
Exciterlow speed
83 (1200) 241 (3500)
Exciterhigh speed
103 (1500) 241 (3500)
Steering
69 (1000) 69 (1000)
Brake
6.2 (90) 6.2 (90)
Hydraulic System RT SC Repair
wc_tx000418gb.fm 86
6.4 Hydraulic Schematics
BOM 9026 SN 55461321 and lower; BOM 9025 SN 5549417 and lower
10
9
a
A B
b
3500 PSI
P1 G-P1
EM
EP
6 GPM
DP
6 GPM
G-P2 T 1000 PSI / 69 Bar T1
.125
P2
90 PSI
b
S1 S2
a
B
b
a
A
B A
DM DM
13
8
7
15
2
6
5
5
4
11
12
14
wc_gr000990
3 3
1
RT SC Repair Hydraulic System
wc_tx000418gb.fm 87
Hydraulic Schematic Components
See Graphic: wc_gr000990
Ref. Description Ref. Description
1 Parking brake 9 Oil cooler
2 Brake valve 10 Return line filter
3 Drive motor 11 Steering cylinder
4 Drive pump 12 Steering valve
5 Exciter motor 13 Suction strainer
6 Exciter pump 14 Travel valve
7 Exciter (vibration) valve 15 High-speed travel valve
8 Control manifold
Hydraulic System RT SC Repair
wc_tx000418gb.fm 88
BOM 9026 SN 55461322 and higher; BOM 9025 SN 5549418 and higher
10
9
13
8
7
15
2
6
5
5
4
11
12
14
wc_gr002782
3 3
1
a
A B
b
3500 PSI
P1 G-P1
EM
EP
6 GPM
DP
6 GPM
3000 PSI
G-P2 T 1000 PSI / 69 Bar T1
.125
P2
90 PSI
b
S1 S2
a
B
b
a
A
B A
DM DM
RT SC Repair Hydraulic System
wc_tx000418gb.fm 89
Hydraulic Schematic Components
See Graphic: wc_gr002782
Ref. Description Ref. Description
1 Parking brake 9 Oil cooler
2 Brake valve 10 Return line filter
3 Drive motor 11 Steering cylinder
4 Drive pump 12 Steering valve
5 Exciter motor 13 Suction strainer
6 Exciter pump 14 Travel valve
7 Exciter (vibration) valve 15 High-speed travel valve
8 Control manifold
Hydraulic System RT SC Repair
wc_tx000418gb.fm 90
6.5 Hydraulic Diagram

RT SC Repair Hydraulic System
wc_tx000418gb.fm 91
6.6 Hydraulic Diagram Components
See Graphic: wc_gr001693

Ref. Description Ref. Description
1 Parking brake 6 Exciter pump
2 Hydraulic tank 7 Steering cylinder
3 Drive motor 8 Control manifold
4 Drive pump 9 Oil cooler
5 Exciter motor
Hydraulic System RT SC Repair
wc_tx000418gb.fm 92
6.7 Exciter Circuit
BOM 9026 SN 55461321 and lower; BOM 9025 SN 5549417 and lower
22
a
A B
b
3500 PSI
P1 G-P1
EM
EM
6 GPM GP 6 GPM
3000 PSI
G-P2 T T1
.125
P2
90 PSI
b
S1 S2
a
B
b
a
A
B A
wc_gr002126
No Vibration
RT SC Repair Hydraulic System
wc_tx000418gb.fm 93
BOM 9026 SN 55461321 and lower; BOM 9025 SN 5549417 and lower

A B
b
3500 PSI
P1
G-P1
EM EM
6 GPM GP 6 GPM
G-P2 T
90 PSI
wc_gr002128
AA
a
bb
3500 PSI
P11 G-P1
EM EM
6 GPM GP 6 GPM
G-P2 T
90 PSI
wc_gr002127
Low Vibration
High Vibration
Hydraulic System RT SC Repair
wc_tx000418gb.fm 94
BOM 9026 SN 55461322 and higher; BOM 9025 SN 5549418 and higher
22
a
A B
b
P11 G-P1
EM
6 GPM GP 6 GPM
3000 PSI
G-P2 T 1000 PSI / 69 Bar T1
.125
P2
90 PSI
BR S1 S2
a
B
b
a
A
B A
wc_gr002786
No Vibration
RT SC Repair Hydraulic System
wc_tx000418gb.fm 95
BOM 9026 SN 55461322 and higher; BOM 9025 SN 5549418 and higher
22
AA B
b
3500 PSI
P11 G-P1
EM EM
6 GPM GP 6 GPM
G-P2 T
90 PSI
wc_gr002788
AA
a
b
3500 PSI
P11 G-P1
EM EM
EM EM
6 GPM GP 6 GPM
G-P2 T
wc_gr002787
Low Vibration
High Vibration
Hydraulic System RT SC Repair
wc_tx000418gb.fm 96
6.8 Drive and Brake Circuit
BOM 9026 SN 55461321 and lower; BOM 9025 SN 5549417 and lower
2
a
A B
b
P1 G-P1
EM
6 GPM 6 GPM GP
G-P2 T 1000 PSI / 69 Bar T1
.125
P2 BRR
b
S1 S2
a
B
b
a
A
B A
wc_gr002129
No Movement
RT SC Repair Hydraulic System
wc_tx000418gb.fm 97
BOM 9026 SN 55461321 and lower; BOM 9025 SN 5549417 and lower
wc_gr002131
G-P2 1000 PSI / 69 Bar T1
.125
P2 BR
b
S1 S2
a
B
b
a
A
B A
wc_gr002130
G-P2 1000 PSI / 69 Bar T1
.125
P2 BR R S1 S2
a
B A
B A
Forward
Reverse
Hydraulic System RT SC Repair
wc_tx000418gb.fm 98
BOM 9026 SN 55461322 and higher; BOM 9025 SN 5549418 and higher
2
a
A B
b
P1 G-P1
EM
6 GPM 6 GPM GP
3000 PSI
G-P2 T 1000 PSI / 69 Bar T1
.125
P2
90 PSI
BRR S1 S2
a
B
b
a
A
B A
wc_gr002783
No Movement
RT SC Repair Hydraulic System
wc_tx000418gb.fm 99
BOM 9026 SN 55461322 and higher; BOM 9025 SN 5549418 and higher
Forward Reverse
3000 PSI
G-P2 1000 PSI / 69 Bar T1
.125
P2
90 PSI
BR R S1 S2
a
B
B A
wc_gr002784
b
A
3000 PSI
G-P2 1000 PSI / 69 Bar T1
.125
P2
90 PSI
BR R S1 S2
a
B
b
a
A
B A
wc_gr002785
Hydraulic System RT SC Repair
wc_tx000418gb.fm 100
6.9 High-Speed Drive and Brake Circuit
BOM 9026 SN 55461321 and lower; BOM 9025 SN 5549417 and lower
2
a
A B
b
P1 G-P1
EM
6 G 6 GPM GP
G-P2 T 1000 PSI / 69 Bar T1
.125
P2 BR
b
S1 S2
a
B A
B A
wc_gr002132
b
a
RT SC Repair Hydraulic System
wc_tx000418gb.fm 101
BOM 9026 SN 55461322 and higher; BOM 9025 SN 5549418 and higher
22
a
A B
b
P1 1 G-P1
EM
6 GPM GP 6 GPM GP
3000 PSI
G-P2 T 1000 PSI / 69 Bar T1
.125
P2
90 PSI
BRR S1 S2
a
B
b
a
A
B A
wc_gr002789
Hydraulic System RT SC Repair
wc_tx000418gb.fm 102
6.10 Steering Circuit
BOM 9026 SN 55461321 and lower; BOM 9025 SN 5549417 and lower
2
a
A B
b
P1 G-P1
EM
6 GPM 6 GPM GP
G-P2 T 1000 PSI / 69 Bar T1
.125
P2 BR S1 S2
a
B A
B A
wc_gr002133
b
a
3500 PSI
G-P1
.125
P2
90 PSI
4
S1
b
a
wc_gr002135
3500 PSI
1 G-P1
.125
P2
90 PSI
b
S1
a
wc_gr002134
RT SC Repair Hydraulic System
wc_tx000418gb.fm 103
BOM 9026 SN 55461322 and higher; BOM 9025 SN 5549418 and higher
3500 PSI
1 G-P1
.125
P2
90 PSI
wc_gr002792
a
3500 PSI
P1 G-P1
.1
P2
90 PSI
S1
b a
wc_gr002791
2
a
A B
b
P1 G-P1
EM
6 GPM 6 GPM GP
3000 PSI
G-P2 T 1000 PSI / 69 Bar T1
.125
P2
90 PSI
BRR S1 S2
a
B
b
a
A
B A
wc_gr002790
Hydraulic System RT SC Repair
wc_tx000418gb.fm 104
Notes
RT SC Repair Hydraulic Troubleshooting
wc_tx000418gb.fm 105
7. Hydraulic Troubleshooting
7.1 No VibrationFlowchart 3A
Check outgoing signal from
control box.
Does the
machine operate in
high speed?
No
Yes
Does LED
flash when button
is pressed?
No
Yes
See Flowchart 6A
wc_gr003244
Replace
decoder module.
Call Wacker
Service.
Check incoming signal to
decoder.
Does LED
flash when button
is pressed?
No
Yes
Check function of solenoid.
No
Yes
Does
solenoid function
properly?
Check exciter
bearings.
No
Yes
Replace wire.
Replace
solenoid.
Does wire
have continuity?
Yes
Does
solenoid LED
illuminate?
No
No
Replace
button card.
Does
button function
properly?
Yes
Checking power to, and function of
decoder module
With engine ON, check operation
of hydraulic high-speed drive circuit.
Checking solenoid lead
Check continuity of
solenoid lead.
Contrle des solnodes
Check incoming signal
to vibration solenoid.
Checking pressure
at gauge port 1 (G-P1)
Check hydraulic pressure
at gauge port 1.
Checking function of
exciter motors
Check function of
exciter motor.
Removing & testing control
button circuit board
Check function of vibration
button.
Hydraulic Troubleshooting RT SC Repair
wc_tx000418gb.fm 106
7.2 Checking Power to, and Operation of, Decoder Module
See Graphic: wc_gr002196, wc_gr0002340, and wc_gr002335
When the machine and control box are ON, for every command sent
by the control box, the signal transmission indicator LED (a)
illuminates. A corresponding LED (b) on the decoder module flashes
three times for each signal received. An LED on the appropriate
solenoid (c) also illuminates when power is sent to it. By observing
these LEDs, one can determine if an infrared signal is being sent by
the control box, received by the decoder module, and applied to the
corresponding component (solenoid).
The decoder module is fed electric power by the power relay through
the pink/yellow wire within the gray connector. If the decoder module
is receiving power, its green LED will illuminate when receiving a
signal. If the green LED does not illuminate, the decoder module is
malfunctioning or it is not receiving power. To determine if the decoder
module is receiving power, disconnect the grey connector from the
decoder module and with the key switch in the ON position, check pin
2A (d) for 12V (battery voltage).
If 12V is not measured, the decoder module is not receiving electric
power. Trace the wiring to the module and repair as needed.
If 12V is measured at pin 2A, reconnect the grey connector. Check
connection of brown connector on the opposite side of the decoder
module. Check the operation of decoder module by connecting a
jumper wire between the power pin 2 and each of the pins at the trailer
plug, one at a time. As you connect the jumper, observe the LED on
the corresponding solenoid connector. If the LED illuminates, the
decoder module is functioning. If LEDs on two or more of the solenoids
do not illuminate, the decoder module is malfunctioning. Replace the
decoder module.
Pin Purpose Pin Purpose Pin Purpose
1 12Vdc input 4 Ground 7 Reverse
2 5Vdc input 5 Fuel/brake 8 Steer-right
3 Starter 6 Forward 9 Steer-left
RT SC Repair Hydraulic Troubleshooting
wc_tx000418gb.fm 107
wc_gr002335
4
1
8
7
5
3 2
6
9
Hydraulic Troubleshooting RT SC Repair
wc_tx000418gb.fm 108
7.3 Replacing Decoder Module
See Graphic: wc_gr002342

Removal:
7.3.1 Remove the four screws securing the decoder module to the machine
frame.
7.3.2 Rotate the decoder module to aid in removal of the brown connector
plug and remove the brown connector plug (a).
7.3.3 Cut the two wire ties (b) securing the wiring harness.
7.3.4 Remove the green (c) and the grey (d) connector plugs.
7.3.5 Remove the two screws (e) (one also includes ground) from the valve
block securing the block to the block bracket.
7.3.6 Remove the connectors (f) from the left and right turn solenoid valves.
7.3.7 Pull the decoder module (g) from the machine.
Installation:
7.3.8 Slide the decoder module back into position and connect the green (c)
and grey connectors (d).
7.3.9 Re-install the two screws securing the valve block to its bracket (e).
7.3.10 Reconnect the brown connector (a).
7.3.11 Secure the decoder module to the machine frame with four screws.
7.3.12 Secure the wiring harness with two new wire ties (b).
7.3.13 Reinstall the left and right solenoid valve connectors (f).
RT SC Repair Hydraulic Troubleshooting
wc_tx000418gb.fm 109
Hydraulic Troubleshooting RT SC Repair
wc_tx000418gb.fm 110
7.4 Checking Solenoid Lead
See Graphic: wc_gr002197

To check any solenoid lead for continuity:
7.4.1 Disconnect the solenoid lead connector (a) (green connector) from the
decoder module.
7.4.2 Remove the screw securing the LED-end (b) of the solenoid lead to the
solenoid valve.
7.4.3 Trace the wires back through the solenoid lead and test the
appropriate wires between the connector and the LED-end of the
solenoid lead.
7.5 Checking Solenoids
To test the hydraulic valve solenoids:
7.5.1 The high and low vibration solenoids as well as the reverse and
forward solenoids are identical. Replace a suspect coil with a known-
to-be-working coil. If the circuit being tested then works, replace the
suspect coil.
Note: The same test can be carried out between the left and right
steering coils because they are identical.
7.5.2 Measure resistance in the coils. All solenoid coils should measure
between 6.5 and 6.7 Ohms cold; 7.07.5 Ohms warm.
wc_gr002197
a
b
RT SC Repair Hydraulic Troubleshooting
wc_tx000418gb.fm 111
7.6 Replacing Solenoid
See Graphic: wc_gr002199

When replacing a valve, always have the replacement valve ready to
install as soon as the failed valve is removed. This will minimize the
time the hydraulic system is open to contamination.
Removal:
7.6.1 Remove the screw (a) securing the LED connector lead and remove
the lead.
7.6.2 Remove the retaining nut (b) and washer.
7.6.3 Remove the coil (c) from the valve.
7.6.4 Remove the valve (d) from the manifold block.
Installation:
7.6.5 Install the valve (d) into the manifold block. Do not overtighten the
valve.
7.6.6 Slide the coil (c) over the valve.
7.6.7 Position the coil so that the LED connector can be attached, and
secure the LED connector to the coil.
7.6.8 Secure the coil with the washer and retaining nut (b) .

Hydraulic Troubleshooting RT SC Repair
wc_tx000418gb.fm 112
7.7 Checking Pressure at Gauge Port 1 (G-P1)
See Graphic: wc_gr002358
7.7.1 Using a 5000 psi-rated gauge, check pressure at G-P1 (top fitting,
angled upward, on back side of valve block). The pressure should
spike at 3500 psi upon startup of the exciter motors, then settle in at
normal operating pressure of 1200 psi for low vibration and 1500 psi
for high vibration.
RT SC Repair Hydraulic Troubleshooting
wc_tx000418gb.fm 113
7.8 Checking Function of Exciter Motors
See Graphic: wc_gr002357

7.8.1 Have at the ready two 5-gallon pails. Remove exciter motor drain lines
(a & b) at tank. Plug tank fittings as soon as drain lines are
disconnected to avoid contaminating the hydraulic system. Place the
exciter motor case drain lines, one each, into the 5-gallon pails.
7.8.2 Start the engine and allow the hydraulic oil to warm up for several
minutes.
7.8.3 Turn on low vibration and observe the flow from the exciter motor case
drain lines. Turn on high vibration and observe the flow from the exciter
motor case drain lines.
7.8.4 If you observe more flow from one of the case drain lines than the
other, the motor with the greatest flow is bad; replace it. If you observe
a substantial flow from both case drain lines, both motors are bad.
Replace both motors.
Hydraulic Troubleshooting RT SC Repair
wc_tx000418gb.fm 114
7.9 No Steering TroubleshootingFlowchart 4A

With engine ON, check operation
of travel circuit.
Does the
travel circuit function
properly?
No
Yes
Does
LED flash when
attempting to
steer?
Does
LED flash when
attempting to
steer?
No
Yes
No
Yes
Check condition of joystick brushes.
Check incoming signal to
decoder.
Are
brushes
OK?
No
Yes
Replace
brushes.
Rebuild/replace
steering cylinder.
Rebuild/replace
control box. Call
Wacker Service.
Replace
decoder module.
Call Wacker
Service.
wc_gr003245
See Flowchart 5A
Checking power to, and function of
decoder module
Check outgoing signal from
control box.
Check function of solenoid.
No
Yes
Does
solenoid function
properly?
No
Yes
Replace wire.
Replace
solenoid.
Does wire
have continuity?
Yes
Does
solenoid LED
illuminate?
No
Checking solenoid lead
Check continuity of
solenoid lead.
Checking solenoids
Check incoming signal
to steering solenoid.
RT SC Repair Hydraulic Troubleshooting
wc_tx000418gb.fm 115
7.10 No Travel TroubleshootingFlowchart 5A

Does
LED flash when
attempting to
travel?
Does
LED flash when
attempting to
steer?
No
Yes
No
Yes
Check condition of joystick brushes.
Check incoming signal to
decoder.
Are
brushes
OK?
No
Yes
Replace
brushes.
Rebuild/replace
control box. Call
Wacker Service.
Replace
decoder module.
Call Wacker
Service.
wc_gr003246
Checking power to, and function of
decoder module
Check outgoing signal from
control box.
Check function of solenoid.
No
Yes
Does
solenoid function
properly?
No
Yes
Replace wire.
Replace
solenoid.
Does wire
have continuity?
Yes
Does
solenoid LED
illuminate?
No
Checking solenoid lead
Check continuity of
solenoid lead.
Checking solenoids
Check incoming signal
to travel solenoid.
Replace drive
motor.
Checking pressure
at gauge port 2 (G-P2)
Check hydraulic pressure
at gauge port 2.
Checking function of
drive motors
Check function of
drive motor.
Hydraulic Troubleshooting RT SC Repair
wc_tx000418gb.fm 116
7.11 Checking Pressure at Gauge Port 2 (G-P2)
See Graphic: wc_gr002358
7.11.1 Using a 5000 psi-rated gauge, check pressure at G-P2 (bottom fitting
on back side of valve block). The pressure should spike at 3000 psi
upon startup of the drive motors, then settle in at normal operating
pressure of 1200 psi for low-speed travel and 1500 psi for high-speed
travel.
7.12 Checking Function of Brake
See Graphic: wc_gr002379 and wc_gr002358
7.12.1 On item 9025 serial number 5549418 and above, also on item 9026
serial number 5546132 and above, disconnect the brake solenoid (b).
On all other machines, disconnect the brake hose (a) at the manifold.
Plug the fitting at the manifold and the hose to prevent contamination
of the hydraulic system.
7.12.2 Start the machine and attempt to drive forward, then reverse. A
working brake will prevent movement of the machine in either
direction.
7.12.3 If the machine drives through the brake, the mechanical activation of
the brake is faulty; rebuild the brake. See Section Rebuilding Brake.

RT SC Repair Hydraulic Troubleshooting
wc_tx000418gb.fm 117
7.13 Checking Function of Drive Motors
See Graphic: wc_gr002357

7.13.1 Remove brake hose at manifold and plug it. See Section Checking
Function of Brake.
7.13.2 Have at the ready two 5-gallon pails. Remove drive motor drain lines
(c & d) at tank. Plug tank fittings as soon as drain lines are
disconnected to avoid contaminating the hydraulic system. Place the
drive motor case drain lines, one each, into the 5-gallon pails.
7.13.3 Start the engine and allow the hydraulic oil to warm up for several
minutes.
7.13.4 Turn on forward travel and observe the flow from the drive motor case
drain lines. Turn on reverse travel and observe the flow from the drive
motor case drain lines.
7.13.5 If you observe more flow from one of the case drain lines than the
other, the motor with the greatest flow is bad; replace it. If you observe
a substantial flow from both case drain lines, both motors are bad.
Replace both motors.
Hydraulic Troubleshooting RT SC Repair
wc_tx000418gb.fm 118
7.14 No High Speed Travel TroubleshootingFlowchart 6A

Does
LED flash when
attempting high speed
travel?
Does
exciter function?
No
Yes
No
Yes
Check condition of joystick brushes.
Check exciter operation in
low speed.
Replace drive motor.
Call Wacker Service.
Are
brushes
OK?
No
Yes
Replace
brushes.
wc_gr003247
Rebuild/replace
control box. Call
Wacker Service.
Yes
Replace exciter
pump. Call
Wacker Service.
No
Replace
button card.
Does
button function
properly?
Checking power to, and function of
decoder module
With machine ON and moving, check
outgoing signal from control box.
Removing & testing control
button circuit board
Check function of vibration
button.
Check function of solenoid.
No
Yes
Does
solenoid function
properly?
No
Yes
Replace wire.
Replace
solenoid.
Does wire
have continuity?
Yes
Does
solenoid LED
illuminate?
No
Checking solenoid lead
Check continuity of
solenoid lead.
Check function of high-
speed travel valve.
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 119
8. Disassembly/Reassembly Procedures
8.1 Tools
Because all possible problems encountered while repairing the
equipment cannot be anticipated, it is up to the mechanic to use
common sense and good judgement in tool selection.
The use of any special tools is recommended only for those operations
where the use of conventional tools proves inadequate.
Before substituting another tool or procedure, you should be satisfied
that neither personal injury nor damage to the component will result.
8.2 Ordering Parts
The repair procedures contained in this manual do not include part
numbers. For parts replacement information, refer to the Parts Book
originally supplied with the unit.
If the original Parts Book has been lost, a replacement may be ordered
from Wacker Corporation. When ordering a replacement Parts Book,
please list the model number, item number, revision level, and serial
number of the machine. Parts Books are also available on the Wacker
Corporation Web site. See www.wackergroup.com. Enter the site as a
visitor.
8.3 Reference Numbers ( )
Repair procedures contain reference numbers enclosed in
parentheses ( ). These numbers refer to the item numbers shown on
the assembly drawings and other detailed drawings. They are included
to aid the mechanic in identifying parts and assembling components.
8.4 Weight Block
See Graphic: wc_gr000843
The weight block symbol gives an approximate weight measurement
to aid the mechanic when lifting/hoisting larger components.
250 kg
(550 lbs.)
wc_gr000843
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 120
8.5 Articulated Joint
See Graphic: wc_gr002346

Disassembly:
8.5.1 Position the machine so that the two halves are not straight in-line with
each other; but rather, are off center by approximately 5.
8.5.2 Support the two machine halves with jack screws (a).
8.5.3 Remove the nut (b) scuring the pivot pin (c) and remove the pivot pin.
8.5.4 Remove the four screws (d) securing the bearing bracket (e) and
remove the bearing bracket.
8.5.5 Using an Arbor press, press the bearing (f) from the bearing bracket.
8.5.6 If replacing only the bearing, continue with step 10. If replacing the
entire articulated joint, remove the four screws (g) securing the pivot
block (h) and remove the pivot block.
8.5.7 If replacing screws, place a floor jack or third screw jack underneath
the drum support. Remove the four screws (i) securing the inside
shockmountsthere are two on the left and two on the right hand side
of the machine. Using the jack, jack up the drum support just enough
to lift the shockmount boss out of the way to remove the screws.
Reassembly:
8.5.8 Using blue Loctite 243 or equivalent on the four screws (i), secure the
shockmounts to the frame. Torque screws to 120 Nm (88 ft.lbs.)
8.5.9 Slide the pivot block (h) into the frame and secure it with four screws
(g). Use blue Loctite 243 or equivalent on screws and torque to 120
Nm (88 ft.lbs.)
8.5.10 Using an Arbor press, press the replacement bearing (f) into the
bearing bracket (e), marking-side in first. Press the bearing down until
it seats on the shoulder of the bearing bracket.
8.5.11 Slide the bearing bracket and washer (j) into the frame and secure the
bearing bracket to the frame with four screws (d). Use blue Loctite 243
or equivalent on screws and torque to 120 Nm (88 ft.lbs.)
8.5.12 Insert pivot pin (c) through pivot block (h) and bearing bracket. Secure
the pin with M24 nut (b).
8.5.13 Grease bearing with Shell Alvania #2 or UNIREX #2 grease or
equivalent.
8.5.14 Repeat procedure for upper portion of joint.
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 121
5
c
e
f
j
d
b
g
h
i
a
wc_gr002346
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 122
8.6 Drum Support Exploded View
46
41
45
42
43
40
47
30
34
33
32
31
39
9 10 11
12
13
14
16
16
19
24
7
6
6
4
25
3
1
2
26
27
28
29
wc_gr002097
20
21
22
23
7
6
5
26
27
28
4
3
2
1
17
15
36
35
38
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 123
8.7 Drum Support Components
See graphic: wc_gr002097

Ref. Description Ref. Description
1 2-1/8 nut 25 Seal
2 Washer 26 9/16-18 plug
3 Drum hub 27 O-Ring
4 M10 x 20 screw 28 Cover
5 Cover 29 Drum support
6 Roller bearing 30 Retaining ring
7 Retaining ring 31 M8 x 25 screw
8 O-Ring 32 Shaft seal
9 Plate 33 Ball bearing
10 M8 x 16 screw 34 Retaining ring
11 3/8-16 x 1 screw 35 Retaining ring
12 Washer 36 Ball bearing
13 Pinion gear 37 O-Ring
14 Drive motor 38 Screw
15 M12 x 60 screw 39 Cover
16 Key 40 Plate
17 Drive shaft 41 O-Ring
18 Key 42 Shaft
19 Retaining ring 43 Spring
20 M8 x 20 screw 44 Ring
21 Cover 45 Roll pin
22 Shaft seal 46 Housing
23 Pinion gear 47 Pinion gear
24 Retaining ring -- --
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 124
8.8 Identifying Drum Supports
See graphic: wc_gr002053

8.8.1 The rear drum (1) contains a brake (a), a drive motor (b), an exciter
assembly (c) with exciter motor (d).
8.8.2 The front drum (2) contains a drive motor (b) and an exciter assembly
(c) with exciter motor (d).
8.8.3 When disassembling the drum support, always start on the exciter side
of the drumit can be identified by the bulge (e) in the casting.
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 125
8.9 Removing Drums
See graphic: wc_gr002052

8.9.1 Lock articulated joint.
8.9.2 Lift one end of the machine using an appropriate crane or hoist. Insert
jack stands (x) to support machine from underneath.
8.9.3 Remove the M12 screws (a) and washers and remove the scrapers
(b).
8.9.4 Remove the six M16x55 screws (d) securing the drum (e) to the drum
support (f).
8.9.5 Remove the three M16 screws (c) and washers acting as plugs. In
their place, insert three of the M16x55 removed in the previous step.
Use these screws as pushers to push the drum off the drive housing.
wc_gr002052
a
b
d
c
f
e
x
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 126
8.10 Installing Drums
See graphic: wc_gr002052
8.10.1 Lock articulated joint.
8.10.2 Lift one end of the machine using an appropriate crane or hoist. Insert
jack stands (x) to support machine from underneath.
8.10.3 Place the drum (e) on the drum support (f) and secure it to the hub
using six M16x55 screws (d) and washers. Use Loctite 243 or
equivalent on the screws and torque them to 210 Nm (154 ft.lbs.).
8.10.4 Install the scrapers (b) using M12 screws (a). Use Loctite 243 or
equivalent on the screws and torque them to 120 Nm (88 ft.lbs.).
8.11 Opening Drum
See graphic: wc_gr002347
8.11.1 Loosen the center hub nut (a) so that it is nearly off (23 threads
remaining on). Do so for both sides of the drum.
8.11.2 Remove the scrapers and the drums. See Section Removing Drums.
8.11.3 Position the drum support slightly off the floor and support it with jack
stands.
8.11.4 Starting with the exciter side, remove the outer ring of bolts (b)
securing the slave hub assembly onto the drum support.
8.11.5 Using three pusher bolts in position (c), gradually push the slave hub
assembly off the drum support. When the hub releases from the taper
of the drive shaft a distinct pop will be heard. Be sure to leave the
center hub nut on the shaft 23 threads to prevent the hub assembly
from popping off the drum.
8.11.6 Once the slave hub assembly is free, remove the hub nut and remove
the slave hub assembly (d) from the drum support.
8.11.7 If working on the rear drum support, disconnect the hydraulic line (e)
to the brake. Cap the line immediately after disconnecting it to prevent
contamination of the hydraulic system.
8.11.8 Disconnect the hydraulic lines to the drive motor (f). Cap all lines
immediately after disconnecting them to prevent contamination of the
hydraulic system.
8.11.9 On the opposite side of the drum support, remove the outer ring of
bolts securing the drive hub assembly onto the drum support.
8.11.10 Using three pusher bolts, gradually push the drive hub assembly off
the drum support. With the help of an assistant, pull the drive hub
assembly completely from the drum support. The assembly will include
the shaft, drive motor (g), and the brake (h) on rear drum supports.
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 127

8.12 Closing Drum
See Graphic: wc_gr002347 and wc_gr002097
8.12.1 Reassemble drive and slave hubs. See sections Reassembling Drive
Hub and Reassembling Slave Hub.
8.12.2 With the aid of an assistant, position the drive hub assembly (shaft,
drive hub, drive motor, and brake on rear drums) into the drum support.
Secure the assembly to the drum support using twelve M10 x 20
screws. Use Loctite 243 or equivalent on the screws and torque them
to 49 Nm (36 ft.lbs.).
8.12.3 Tighten the hub nut. Torque the hub nut to 816 Nm (600 ft.lbs.).
8.12.4 Connect the drive motor and brake hydraulic lines.
8.12.5 On the exciter side of the drum support, position the slave hub on the
drum support. Secure the assembly to the drum support using twelve
M10 x 20 screws. Use Loctite 243 or equivalent on the screws and
torque them to 49 Nm (36 ft.lbs.).
8.12.6 Tighten the hub nut. Torque the nut to 816 Nm (600 ft.lbs.).
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 128
8.13 Disassembling Drive Hub
See Graphic: wc_gr002352 and wc_gr002097
8.13.1 Remove drum. See Section Removing Drum.
8.13.2 Open drum. See Section Opening Drum.
8.13.3 Remove drive motor (a) and brake (b) (on rear hubs).
8.13.4 Remove oil from drive hub. Dispose of oil properly.
8.13.5 Remove five screws (c) securing gear cover (d) and remove the gear
cover.
Note: Because gasket eliminator is applied to the mating surfaces of
the hub and the gear cover during assembly, it may be necessary to
tap the gear cover to break it loose.
8.13.6 Press the shaft seal (e) from the gear cover.
8.13.7 Remove the retaining ring (f).
8.13.8 Leave the hub nut (g) on the shaft and using three pusher bolts (h), pull
the gear off the shaft.
8.13.9 Pull the lip seal off the shaft.
8.13.10 With the hub nut loose but still on the shaft, tap the hub from the
opposite side to break the hub loose from the taper on the shaft.
Note: Leaving the hub nut threaded on the shaft prevents the hub from
popping off the shaft when the hub releases from the taper on the
shaft.
8.13.11 Pull the key from the shaft.
8.13.12 Invert the hub as shown and using a propane torch heat the bearing
inner race quickly. When heated to the proper temperature, the
bearing race will slide off the hub. Pull it from the shaft if necessary.
8.13.13 Remove the retaining ring from the gear cover and remove the outer
bearing race.

RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 129
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 130
8.14 Reassembling Drive Hub
See Graphic: wc_gr002355 and wc_gr002097
8.14.1 Insert the replacement bearing outer race (6) (markings side in first)
into the gear cover (5) and secure it with the retaining ring (7).
8.14.2 Press the inner bearing race (a) onto the hub and add a new seal (b)
to the hub. When hub nut is tightened, the seal seats into gear cover
(5).
8.14.3 Insert the key (16) and the retaining ring (19) on the shaft (17). Cool
the shaft with cold water and apply a thin film of oil to the shoulder of
the shaft (c) where the gear will rest. Heat the gear to 400F (use a hot
plate or similar source). Then, slide or press the shaft into the gear (23)
up to the retaining ring.
Note: When heated to the correct temperature, very little pressure is
required to press the shaft into the gear.
8.14.4 Allow the gear and shaft to cool. Slide the shaft assembly through the
gear cover.
8.14.5 Apply Loctite flexible anaerobic gasket or equivalent on the gear cover
and connect the gear casing cover (21) to the gear cover using five
M8x20 screws (4). Use Loctite 243 or equivalent on the screws and
torque the screws to 41 Nm (30 ft.lbs.).
8.14.6 Add key (d) and seal (e) to shaft.
8.14.7 Place the hub (3) onto the shaft and secure it with washer (2) and hub
nut (1).
8.14.8 Fill hub with 12.5 oz. of 10W30. See specification chart.
8.14.9 Apply Loctite flexible anaerobic gasket (f) or equivalent between face
of gear casing cover and the drive motor. Install the drive motor (g)
using three M12 screws. Use Loctite 243 or equivalent on the screws
and torque the screws to 85 Nm (62 ft.lbs.).
8.14.10 Apply Loctite flexible anaerobic gasket or equivalent between face of
gear casing cover and the brake. Install the brake (h) using three M8
screws. Use Loctite 243 or equivalent on the screws and torque them
to 41 Nm (30 ft.lbs.).
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 131
b
wc_gr002355
a
d
g
f
c
e
e
1
2
3
4
8
23
22
9
10
11
12
13
14
15
17
16
19
20
21
18
6
5 7
26
27
28
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 132
8.15 Disassembling Slave Hub
See Graphic: wc_gr002353 and wc_gr002097
8.15.1 Remove the retaining ring (a) and remove the disc (b).
8.15.2 Remove the bearing outer race (c) from the cover.
8.15.3 Press the seal (d) from the cover.
8.15.4 Invert the hub as shown and using a propane torch heat the bearing
inner race quickly. When heated to the proper temperature, the
bearing race will slide off the hub. Pull it from the shaft if necessary.
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 133
59
52
70
71
64
57
62
53
671
672
60
758
b
wc_gr002353
c
d
a
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 134
8.16 Reassembling Slave Hub
See Graphic: wc_gr002356 and wc_gr002097
8.16.1 Press new seal (a) into cover.
8.16.2 Apply a liberal amount of EMB lubriplate white grease or equivalent to
the replacement bearing outer race (b) and insert it into the gear cover.
Secure it with the disc (c) and retaining ring (d).
8.16.3 Press the inner bearing race (e) onto the hub and add new
replacement seal (f).
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 135

59
52
70
71
64
57
62
53
671
672
60
758
b
a
c
d
f
e
wc_gr002356
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 136
8.17 Rebuilding Brake
See Graphic: wc_gr002354
Disassembly:
8.17.1 Open the drum. See Section Opening the Drum.
8.17.2 Remove drive hub. See Section Disassembling Drive Hub.
8.17.3 Remove the three screws (698) securing the brake to the hub and
remove the brake.
Note: Gasket eliminator is applied to the mating surfaces of the hub
and the brake during assembly, it may be necessary to tap the brake
cover to break it loose from the hub.
8.17.4 Remove fitting and drain hydraulic oil from casing; dispose of hydraulic
oil properly.
8.17.5 Remove the retaining ring (90) and remove gear (56).
8.17.6 Remove the six screws (693) securing the cover (81) and remove the
cover.
8.17.7 Remove O-ring (a) from cover.
8.17.8 Remove the plate (83) and inner O-ring (94) from housing (80).
8.17.9 Remove the retaining ring (89) and pull bearing (87) from cover.
8.17.10 Pull the shaft (82) from inside the housing.
8.17.11 Remove the ring spacer (84) and spring (85).
8.17.12 Remove the retaining ring (88) and pry bearing (b) out of housing.
8.17.13 Pull seal (c) from housing.
Reassembly:
8.17.14 Insert the seal (c) into housing.
8.17.15 Insert bearing (86) into housing (80) and secure with retaining ring
(88).
8.17.16 Dip O-ring (94) in hydraulic oil and position on face of housing.
8.17.17 Insert bearing (87) into cover (81) and secure with retaining ring (89).
8.17.18 Align holes in plate (83) with pins and place plate on housing.
8.17.19 Add spring (85) and gear to shaft and insert shaft assembly into
housing.
8.17.20 Apply Loctite 243 or equivalent to six screws (693) and secure cover
(81) to housing.
8.17.21 Add gear (56) to shaft and secure with retaining ring (90).
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 137
80
69
92
82
84
85
83
56
90
88
86
91
698
81
87
69
89
693
b
wc gr002354
c
a
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 138
8.18 Exciter Exploded View
10
5
12
8
2
4
1
13
692
702
12
14
695
14
702
12
71
70
4
13
3
8
11
692
720
12
5
9
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 139
8.19 Exciter Parts List
Ref.
Pos.
Part No.
Artikel Nr.
Qty.
St.
Description
Beschreibung
Descripcin
Description
Measurem./Abm.
Torque/Drehm.
Norm
Sealant
Schmierstoff
1 0116902 1
Drum support
Bandagentrger
Basa del tambor
Support de tambour
2 0119224 1
Exciter shaft
Erregerwelle
Eje del excitador
Arbre de l'excitatrice
3 0119225 1
Exciter shaft
Erregerwelle
Eje del excitador
Arbre de l'excitatrice
4 0119226 2
Eccentric weight
Unwucht
Masa excntrica
Balourd excentrique
5 0119227 2
Eccentric weight
Unwucht
Masa excntrica
Balourd excentrique
8 0116318 2
Gear
Zahnrad
Engranaje
Engrenage
9 0116958 1
Cover
Deckel
Tapa
Couvercle
10 0116959 1
Bearing cover
Lagerdeckel
Tapa del rodamiento
Couvercle du roulement
11 0119314 1
Exciter motor
Erregermotor
Motor excitador
Moteur d'excitatrice
12 0080742 4
Roller bearing
Rollenlager
Rodamiento de rodillos
Roulement rouleaux
14 0080211 2
Cover
Deckel
Tapa
Couvercle
67 0116872 1
Key (square)
Keil
Chaveta
Clavette
A14 x 9 x 50 DIN6885
70 0014398 3
O-Ring
O-Ring
Anillo-O
Joint torique
12 x 2
71 0078269 3
Plug (threaded)
Schraubverschlu
Tapn roscado
Bouchon
9/16-18in
692 0011457 12
Screw
Schraube
Tornillo
Vis
M8 x 25
25Nm/18ft.lbs
DIN933
0029311
695 0011543 2
Screw
Schraube
Tornillo
Vis
M8 x 20
41Nm/30ft.lbs
DIN912
0029311
702 0012361 12
Screw
Schraube
Tornillo
Vis
M8 x 16
25Nm/18ft.lbs 0029311
720 0033988 2
Lockwasher
Federring
Arandela elstica
Rondelle de ressort
10
wc_gr002351
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 140
8.20 Disassembling Exciter
See graphic: wc_gr002349
8.20.1 Open the drum. See Section Opening the Drum.
8.20.2 Remove the two screws (a) securing the exciter motor (b) to the drum
support and remove the exciter motor.
8.20.3 Remove the screws securing the exciter housing cover. Use two of the
longer screws (c) as pushers to push off the exciter housing cover (d).
8.20.4 Pull the exciter shaft (e) and drive gear from the exciter housing.
8.20.5 Remove the screws securing the bearing cover (f) to the exciter
housing. Remove the bearing cover by tapping it from inside the
exciter housing.
8.20.6 On the opposite side of the machine, remove the exciter housing cover
and the bearing cover as stated above.
8.20.7 Pull the second exciter shaft and drive gear from the exciter housing.
8.20.8 Using a properly-sized adapter plug (g), tap the bearing from the
exciter housing.
8.20.9 Using an Arbor press, press the bearing from the exciter housing cover
(h) that the exciter motor mounts to.
8.20.10 Using an inside-style puller, pull the bearing from the other exciter
housing cover (i).
8.20.11 Tap on the small eccentric weight (j) to remove the bearing race from
the exciter shaft.
8.20.12 Using a gear puller (k), pull the gear and the inner bearing race off the
exciter shaft.
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 141
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 142
8.21 Reassembling Exciter
See Graphic: wc_gr002350
8.21.1 Using an Arbor press, press new outer bearing races (a) into the
exciter housing covers.
8.21.2 Install the eccentric weight (b) and key (c) on exciter shaft. Then, press
the gear (d) and the bearing race (e) onto the exciter shaft. Do so for
both exciter shafts.
8.21.3 On the opposite side of each shaft, install the eccentric weight (f) and
press the inner race (g) onto the exciter shaft. Do so for both exciter
shafts.
8.21.4 Insert the bearing outer race (h) into the follower side of the exciter
housing.
8.21.5 Insert the follower-side exciter shaft assembly into the exciter housing.
8.21.6 Apply Loctite 515 gasket eliminator or equivalent to the bearing cover
(i) and secure the follower-side bearing cover to the exciter housing
with six screws. Torque screws to 25 Nm (18 ft.lbs.)
8.21.7 Insert the exciter-side bearing outer race into the exciter housing.
Apply Loctite 515 gasket eliminator or equivalent to the bearing cover
and secure the cover with six M8x16 screws. Use Loctite 243 or
equivalent on screws and torque to 25 Nm (18 ft.lbs.).
8.21.8 Fill exciter housing with oil.
8.21.9 Insert driven exciter assembly into the exciter housing so that weights
are even and level with each other (j).
8.21.10 Apply Loctite 515 gasket eliminator or equivalent to the bearing cover
and secure the cover with six M8x25 screws. Use Loctite 243 or
equivalent on screws and torque to 25 Nm (18 ft.lbs.).
8.21.11 Apply Loctite 515 gasket eliminator or equivalent to the exciter motor
and secure with two M8x20 screws. Use Loctite 243 or equivalent on
screws and torque to 25 Nm (18 ft.lbs.).
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 143
a
wc_gr002350
b
c
d
i
j
e
g
h
f
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 144
8.22 Removing Drum Support
See Graphic: wc_gr002348
8.22.1 Open the drum. See Section Opening the Drum.
8.22.2 Disconnect the hydraulic lines (a) at the exciter motor. Plug hydraulic
lines immediately after disconnecting to prevent contamination of the
hydraulic system.
8.22.3 Remove the exciter components (weights, shafts, covers). See
Section Rebuilding Exciters.
8.22.4 Empty the drum support of oil.
8.22.5 Label positions of all the hoses (b).
8.22.6 Cut the wire tie (c).
8.22.7 Using an appropriate hoist or crane, raise the machine approximately
six inches off the ground. Using an appropriate hoist or crane, secure
the drum support in the raised position (d). Using jack stands (e) or
screw jacks, secure the machine frame in position. Secure the
machine frame and the drum support using separate devices. You
will be required to lower the drum support in upcoming steps while
retaining the position of the machine frame.
8.22.8 Remove the shock mount screws (f) at the outer and the upper inner
locations.
8.22.9 Lower the drum support to gain access to the upper hose clamp.
8.22.10 Loosen the nuts (g) of the hose clamps. Remove the screws (h)
securing the hose clamps to the drum support.
8.22.11 Remove the brake line (i) from the valve block and pull the brake line
from the drum support.
8.22.12 Lower the drum support to the floor. Guide the hoses through it as it is
being lowered.
8.22.13 Remove the screw (j) securing the lower inner shock mount.
8.22.14 Continue guiding the hoses through the drum support and pull the
drum support completely away from the frame.
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 145
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 146
8.23 Installing Drum Support
See Graphic: wc_gr002348 and wc_gr002359
8.23.1 With shock mounts attached to drum support, position drum support on
the floor and under frame of machine. As you position it, guide the
hydraulic hoses into the drum support.
8.23.2 Attach upper and lower hose clamps to drum support. During mounting
of hose clamps on rear drums, attach hose guard (15). Do not tighten
hose clamps around hoses at this time.
8.23.3 Lower the machine frame so that the outer shock mounts can be
secured. Use Loctite 243 or equivalent on the screws and torque them
to 86 Nm (63 ft.lbs.).
8.23.4 Continue lowering machine until innermost shock mounts can be
secured. Use Loctite 243 or equivalent on the screws and torque them
to 86 Nm (63 ft.lbs.).
8.23.5 Cut the head off an M10 screw. Insert it into the drum support in an
upper location and use it as a guide pin. With the aid of an assistant or
appropriate crane, position the drive hub assembly so that the shaft is
approximately halfway in to the drum support. Connect the hydraulic
line leading to the hydraulic fitting (b) on the drive motor that is closest
to the drive hub. Using the pin as a guide, slide the drive hub assembly
the rest of the way into the drum support.
8.23.6 Use Loctite 243 or equivalent on twelve M10x20 screws and secure
the drive hub assembly to the drum support. Torque the screws to 49
Nm (36 ft.lbs.).
8.23.7 Attach the rest of the hydraulic lines and add wire tie.
8.23.8 Tighten hose clamps around hoses.
8.23.9 Grease inner seal (c) with white lithium grease and place it
approximately halfway on the taper portion of the drive shaft.
8.23.10 Install the key on drive shaft and install the hub with hub nut. Torque
hub nut to 816 Nm (600 ft.lbs.). Also torque drive-side hub nut.
8.23.11 Install drums and scrapers. See Section Installing Drums.
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 147
694
709
719
3
680
718
685
682
72
48
704
718
685
682
777
49
371
46
47
16
702
777
15
685
682
wc_gr002359
a
c
b
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 148
8.24 Replacing Steering Cylinder
See Graphic: wc_gr002368
Removal:
8.24.1 Position the roller as shown (1) so that you have adequate access to
the piston head screw (a). If the steering cylinder is not allowing you to
position the roller in this manner, remove the steering hydraulic hoses
(b & c) at the valve. Then, manually position the roller.
8.24.2 Loosen, but do not remove, the screw securing the piston head.
8.24.3 Reposition the roller in the opposite manner as shown (2). This retracts
the piston and allows the cylinder to be removed more readily.
8.24.4 Remove the steering hydraulic hoses (b & c) at the valve.
8.24.5 Remove the drive hydraulic hoses (d & e) at the valve.
8.24.6 Remove the piston head screw (a) and the cylinder head screw.
8.24.7 Pull the cylinder head up and off the mounting stud. Do likewise for the
piston head. If necessary, jack up the machine slightly at the
articulated joint to increase access.
8.24.8 Maneuver the cylinder (f) until you can pull it up and out of the
machine. If necessary, adjust the angle of the machine halves closer
or farther apart.
8.24.9 Once removed, remove the hydraulic hoses from the cylinder.

Installation:
8.24.10 Insert the cylinder (f) with hoses attached into the machine frame and
place over mounting studs. Remove the hydraulic oil cooler and guard
for improved access. See Section Replacing Hydraulic Oil Cooler.
8.24.11 Using Loctite 243 or equivlaent on M12 screws, secure the cylinder to
the mounting studs. Torque screws to 86 Nm (63 ft.lbs.).
8.24.12 Attach the hydraulic hoses (d & e) at the valve.
8.24.13 Attach the steering hydraulic hoses (b & c) at the valve.
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 149
wc_gr002368
a
1
d
e
b
c
f
2
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 150
8.25 Replacing Valve Block
See Graphic: wc_gr002369
Removal:
Note: Shown with fuel tank removed for clarity.
8.25.1 Remove battery. See Section Removing Battery.
8.25.2 Carefully mark all hydraulic hoses (a) and remove them from the valve.
Immediately plug all hydraulic hoses to prevent contamination of the
hydraulic system.
8.25.3 Remove the green connector plug (b) from the decoder module. All
valve block solenoid wires run to this plug.
8.25.4 Remove the screw (c) securing the ground wires and remove the
ground wires from the valve block.
8.25.5 Remove the four screws securing the bracket at its base and remove
the valve and bracket as an assembly (d).
8.25.6 Remove the valve block from the mounting bracket.
Installation:
8.25.7 Secure the valve block to the mounting bracket.
8.25.8 Position the valve block assembly (d) into the machine frame and
secure it with four M12 screws and nuts. Torque the screws to 86 Nm
(63 ft.lbs.).
8.25.9 Secure the ground wires with screw (c).
8.25.10 Connect the green connector plug (b) to the decoder module.
8.25.11 Replace all the hydraulic hoses (a).
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 151
wc_gr002369
a
b
c
d
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 152
8.26 Replacing Fuel Tank
See Graphic: wc_gr002370
Removal:
8.26.1 Remove battery. See Section Removing Battery.
8.26.2 Drain fuel tank.
8.26.3 Close cocks (a) on inlet and outlet lines at tank.
8.26.4 Remove inlet and outlet hoses at cocks.
8.26.5 Remove the two screws (b) on the upper side and the four screws (c)
on the under side of the frame securing the tank.
Note: Access to screws securing tank to frame is substantially
improved by removing the drum.
8.26.6 Remove the screws securing the air cylinder (d) and remove the
cylinder and the bracket.
8.26.7 Pull the fuel tank from the machine.
Installation:
8.26.8 Position the fuel tank into the machine under the hydraulic tank.
8.26.9 Secure the fuel tank with the four screws (c) on the under side of the
frame and the two screws (b) on the upper side.
8.26.10 Reattach the fuel hoses to the tank at the cocks (a).
8.26.11 Reinstall the air cylinder (d) and bracket.
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 153
wc_gr002370
d
c
a
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 154
8.27 Replacing Hydraulic Tank
See Graphic: wc_gr002371
Removal:
8.27.1 Drain hydraulic oil tank.
8.27.2 Remove fuel tank. See Section Replacing Fuel Tank.
8.27.3 Label then remove the five hydraulic hoses (a) leading into the tank.
The hose (d) from the valve block can remain attached and be
removed after the tank is free.
8.27.4 Remove the hardware (b) securing the hood cable.
8.27.5 Remove the two screws (690) at the top of the hydraulic tank.
8.27.6 Remove the two screws (797) securing the tank to the machine frame.
8.27.7 Remove the hoses (c) connected to the under side of the tank. If the
tank is not drained well, there will be significant spillage. Be sure tank
is well drained. Work quickly to avoid oil spillage. When underside
hoses are free, remove tank from machine.
Installation:
8.27.8 Position tank on machine frame.
8.27.9 Connect hydraulic hoses (c) on under side of tank.
8.27.10 Secure tank to frame with the two upper screws (690) and the two
lower screws (797).
8.27.11 Attach hydraulic hoses (a) to appropriate ports.
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 155
wc_gr002371
a
c
b
d
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 156
8.28 Replacing Hydraulic Pumps
See Graphic: wc_gr002373
Removal:
8.28.1 Drain Hydraulic oil.
8.28.2 Remove hydraulic hoses (a or b).
8.28.3 On drive pump, remove nut and screws securing relay bracket (c).
8.28.4 Remove the four screws securing the pump to the engine and remove
the pump.
Installation:
8.28.5 Secure pump to engine using four screwsapply Loctite 243 or
equivalent to screws and torque to 41 Nm (30 ft.lbs.).
8.28.6 On drive pump, secure relay bracket (c).
8.28.7 Attach hydraulic hoses (a or b).
8.28.8 Fill hydraulic tank with oil.
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 157
wc_gr002373
a
b
c
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 158
8.29 Replacing Hydraulic Oil Cooler
See Graphic: wc_gr002374
Removal:
8.29.1 Drain hydraulic oil tank.
8.29.2 Disconnect the two hose clamps (a) securing the air intake hose (b)
and remove the hose.
8.29.3 Disconnect the two hydraulic hoses (c) running to the cooler. Plug the
hoses immediately after disconnecting to prevent contamination of the
hydraulic system.
8.29.4 Remove the four screws (d) securing the guard and remove the guard
and hydraulic oil cooler as an assembly.
8.29.5 Disconnect the hydraulic lines (e) from the guard to the cooler.
8.29.6 Remove the two screws (f) securing the cooler to the guard and
remove the cooler.
Installation:
8.29.7 Install the cooler to the guard using two screws (f).
8.29.8 Connect the hydraulic lines (e) from the guard to the cooler.
8.29.9 Secure the guard/cooler assembly to the machine using four screws
(d). Torque the screws to 25 Nm (18 ft.lbs).
8.29.10 Connect the two hydraulic hoses (c) running to the cooler.
8.29.11 Connect the air intake hose (b) using two hose clamps (a).
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 159
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 160
8.30 Replacing Radiator and Shroud
See Graphic: wc_gr002375
Removal:
8.30.1 Drain coolant.
8.30.2 Remove hydraulic oil cooler. See Section Removing Hydraulic Oil
Cooler.
8.30.3 Remove drain hose (a) from radiator.
8.30.4 Snip wire ties (b) securing overflow tube (c) and disconnect overflow
tube from radiator.
8.30.5 Disconnect input hose (d) from radiator.
8.30.6 Disconnect coolant level sensor at connector (e).
8.30.7 Remove screws securing shroud (f).
8.30.8 Remove the two nuts securing the radiator to the shock mounts (g).
8.30.9 Loosen the hose clamp and remove the hose (h) running to the engine
at the engine.
8.30.10 Remove the hose clamps on green hose (i) and remove green hose
from engine.
8.30.11 Lift radiator up and out of machine.
If removing shroud:
8.30.12 Remove second hose (j) to overflow reservoir at the overflow reservoir.
8.30.13 Remove nut (k) securing shroud on top of engine and remove shroud.
If removing radiator shock mount:
8.30.14 Remove screw securing shock mount from underneath frame and
remove the shock mount.
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 161
wc_gr002375
a
c
b b
h
i
j
d
f
f
g
e
k
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 162
Installation:

If replacing shock mount:
8.30.15 Secure shock mount to frame using Loctite 243 or equivalent on M10
screw. Torque screw to 49 Nm (36 ft.lbs.).
If replacing shroud:
8.30.16 Preassemble components of shroud if necessary.
8.30.17 Secure shroud to top of engine with nut (k).
8.30.18 Attach hose (j) to overflow reservoir.
8.30.19 Insert radiator into machine frame. Secure radiator to shock mounts
with nuts (g).
8.30.20 Connect green hose (i) to engine using hose clamp.
8.30.21 Connect hose (h) to engine using hose clamp
8.30.22 Secure shroud (f) to radiator.
8.30.23 Connect coolant level sensor at connector (e).
8.30.24 Connect input hose (d) using hose clamps.
8.30.25 Connect overflow tube (c) and new wire ties (b).
8.30.26 Connect drain hose (a).
8.30.27 Fill radiator with coolant.
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 163
wc_gr002375
a
c
b b
h
i
j
d
f
f
g
e
k
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 164
8.31 Replacing Engine
See Graphic: wc_gr002376
Removal:
8.31.1 Drain engine coolant.
8.31.2 Drain hydraulic oil.
8.31.3 Drain engine oil.
8.31.4 Remove hydraulic oil cooler. See section Removing Hydraulic Oil
Cooler.
8.31.5 Remove radiator and shroud. See section Replacing Radiator and
Shroud.
8.31.6 Remove hydraulic pumps. See section Replacing Hydraulic Pumps.
8.31.7 Remove the hardware (a) securing the air cleaner bracket. The lower
hardware also secures the muffler.
8.31.8 Loosen the hose clamp (b) securing the air cleaner and remove the air
cleaner and bracket as an assembly.
8.31.9 Remove the screw (c) securing the dipstick and remove the dipstick.
8.31.10 Remove the screws (d) securing the muffler to the engine. Rotate the
muffler toward the engine, so tab clears bell housing. Then, push the
muffler down and towards rear of machine until it can be lifted out of
the machine.
8.31.11 Remove the oil drain tube (e) at the engine.
8.31.12 Disconnect the wiring harness at the oil pressure sensor (f), throttle
solenoid (g), glow plugs (h), starter (i), voltage regulator (j), and fuel
solenoid (k). On the opposite side of the engine disconnect the coolant
temperature sensor (l).
8.31.13 Remove the ground wires (m) at the starter mounting flange.
8.31.14 Remove the fuel hoses (n) at the fuel inlet. Also remove hoses at fuel
filter (o).
8.31.15 Disconnect the screw at the lifting eye and remove the front hood
cable. Reinstall the lifting eye.
8.31.16 Support the engine by the lifting eyes with an appropriate lift or hoist.
Remove the screws (p) securing the engine to the mounting brackets
and lift the engine off the frame enough to disconnect the ground wire
(q) from the voltage regulator. After the ground wire is disconnected,
lift the engine up and out of the machine.
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 165
wc_gr002376
a
f
g
h
i
k
j
n
o
q
m
l
p
b
d
c
e
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 166
Installation:
8.31.17 Support the engine by the lifting eyes with an appropriate lift or hoist
and position the engine over the machine frame. Connect the ground
wire (q) leading to the voltage regulator. Lower the engine into the
frame and secure it to the mounting brackets using four screws (p).
8.31.18 Connect the oil drain tube (e) at the engine.
8.31.19 Connect the fuel hoses (n) at the fuel inlet. Also connect hoses at fuel
filter (o).
8.31.20 Connect the ground wires (m) at the starter mounting flange.
8.31.21 Connect the wiring harness at the oil pressure sensor (f), throttle
solenoid (g), glow plugs (h), starter (i), voltage regulator (j), and fuel
solenoid (k). On the opposite side of the engine, connect the coolant
temperature sensor (l).
8.31.22 Position the muffler inside the frame and secure it to the engine with
two screws (d).
8.31.23 Secure the dipstick with screw (c).
8.31.24 Using hardware (a) secure the air cleaner bracket. The lower hardware
also secures the muffler.
8.31.25 Connect the hose clamp (b).
8.31.26 Secure the front hood cable at the lifting eye.
8.31.27 Remount the hydraulic pumps. See section Replacing Hydraulic
Pumps.
8.31.28 Remount the radiator and shroud. See section Replacing Radiator and
Shroud.
8.31.29 Fill engine with coolant.
8.31.30 Fill tank with hydraulic oil.
8.31.31 Fill engine with oil.
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 167
wc_gr002376
a
f
g
h
i
k
j
n
o
q
m
l
p
b
d
c
e
Disassembly/Reassembly Procedures RT SC Repair
wc_tx000410gb.fm 168
8.32 Engine Alternator
See Graphic: wc_gr002378
Removal:
8.32.1 Remove the exciter pump. See Section Replacing Hydraulic Pumps.
8.32.2 Remove the five screws (a) securing the flywheel to the engine and
remove the flywheel.
8.32.3 Remove the six screws (b) securing the alternator assembly to the
engine. Also remove the screw (c) securing the connector wire.
Remove the connector from the wire. Slide the wire through the access
hole and pull the alternator assembly from the engine.
Installation:
8.32.4 Position the alternator assembly on the engine.
8.32.5 Feed the connector wire through the access hole and secure it with
screw (c). Remount the connector end on the wire.
8.32.6 Secure alternator assembly to engine using six screws (b).
8.32.7 Secure the flywheel to the engine using five screws. Torque screws to
82 Nm (60 ft.lbs).
8.32.8 Remount exciter pump.
RT SC Repair Disassembly/Reassembly Procedures
wc_tx000410gb.fm 169
Rebuilding Control Box RT SC Repair
wc_tx000410gb.fm 170
9. Rebuilding Control Box
9.1 Removing/Rebuilding Joysticks
See Graphic: wc_gr002189

Disassembly:
9.1.1 Remove the four T10 Torx screws (a) and pull the joystick from control
box.
9.1.2 Disconnect the connector (b).
9.1.3 Unscrew the cap (c). Remove the holding ring (d) and boot (e).
9.1.4 Remove the two T8 Torx screws (f) and remove the housing bottom
cover with circuit board (g). Remove T6 Torx screws (k) and separate
the circuit board from the housing bottom cover.
9.1.5 Remove the three T8 Torx screws (h) and remove the housing (i).
9.1.6 Remove the brush assembly (j).
Reassembly:
9.1.7 Position the brush assembly into the indent (l) of the joystick.
9.1.8 Secure the housing to the joystick.
9.1.9 Secure the circuit board to the housing bottom cover and secure the
assembly to the housing.
9.1.10 Attach the boot, boot ring, and cap to the joystick.
9.1.11 Connect the connector.
9.1.12 Secure the joystick to the control box.

RT SC Repair Rebuilding Control Box
wc_tx000410gb.fm 171
Rebuilding Control Box RT SC Repair
wc_tx000410gb.fm 172
9.2 Removing and Installing Circuit Boards
See graphic wc_gr002182
Disassembly:
9.2.1 Remove the four T16 Torx screws and separate the control into its two
halves.
9.2.2 Label the positions of the red (a), brown (b), and blue (c) wires and
disconnect them. Also disconnect the charge plug connector (d).
9.2.3 Remove the four T10 Torx screws (e) and lift off the primary card (f).
9.2.4 Disconnect the joystick connectors (g).
9.2.5 Remove the four T10 Torx screws (h) securing the secondary card (i)
and lift off the secondary card.
9.2.6 Remove the retaining nut (j) and washer securing the ON/OFF switch
(k). Push the switch body through the control box cover. The primary/
secondary card assembly (l) should now be free from the control box.
Reassembly:
9.2.7 Place the ON/Off switch into the control box cover. Secure the switch
to the cover with washer and retaining nut.
9.2.8 Secure the secondary card to the control box.
9.2.9 Reconnect the joystick connectors.
9.2.10 Secure the primary card to the control box.
9.2.11 Reconnect the red, brown, and blue wires.
9.2.12 Reassemble the two halves of the control box.
9.2.13 Re-install the control box battery if removed.
RT SC Repair Rebuilding Control Box
wc_tx000410gb.fm 173
Rebuilding Control Box RT SC Repair
wc_tx000410gb.fm 174
9.3 Removing & Testing Control Button Circuit Board
See Graphic: wc_gr002188

9.3.1 Remove primary/secondary card assembly.
9.3.2 Remove the six T10 Torx screws (a). The button circuit board (b) is
sealed with silicon and may require a small amount of force to break it
loose from the silicon seal. To do so: Replace three or four of the
screws back into the control box cover approximately one revolution.
Tap on the screw heads to break the card from the silicon seal.
9.3.3 To test the card, check for continuity between the button (c) in question
and common (d) while the button is being pressed. In the graphic, the
engine crank button is being tested. If no continuity is measured,
replace the button circuit board.

Threadlockers and Sealants
Threadlockers and Sealants
Threadlocking adhesives and sealants are specified throughout this
manual by a notation of S plus a number (S#) and should be used
where indicated. Threadlocking compounds normally break down at
temperatures above 175C (350F). If a screw or bolt is hard to
remove, heat it using a small propane torch to break down the sealant.
When applying sealants, follow instructions on container. The sealants
listed are recommended for use on Wacker equipment.
TYPE
( ) = Europe COLOR USAGE
PART NO.
SIZE
Loctite 222
Hernon 420
Omnifit 1150 (50M)
Purple Low strength, for locking threads smaller
than 6 mm (1/4).
Hand tool removable.
Temp. range: -54 to 149C (-65 to 300F)
73287 - 10 ml
Loctite 243
Hernon 423
Omnifit 1350 (100M)
Blue Medium strength, for locking threads
larger than 6 mm (1/4).
Hand tool removable.
Temp. range: -54 to 149C (-65 to 300F)
29311 - .5 ml
17380 - 50 ml
Loctite 271/277
Hernon 427
Omnifit 1550 (220M)
Red High strength, for all threads up to 25 mm
(1).
Heat parts before disassembly.
Temp. range: -54 to 149C (-65 to 300F)
29312 - .5 ml
26685 - 10 ml
73285 - 50 ml
Loctite 290
Hernon 431
Omnifit 1710 (230LL)
Green Medium to high strength, for locking
preassembled threads and for sealing
weld porosity (wicking).
Gaps up to 0.13 mm (0.005)
Temp. range: -54 to 149C (-65 to 300F)
28824 - .5 ml
25316 - 10 ml
Loctite 609
Hernon 822
Omnifit 1730 (230L)
Green Medium strength retaining compound for
slip or press fit of shafts, bearings, gears,
pulleys, etc.
Gaps up to 0.13 mm (0.005)
Temp. range: -54 to 149C (-65 to 300F)
29314 - .5 ml
Loctite 545
Hernon 947
Omnifit 1150 (50M)
Brown Hydraulic sealant
Temp. range: -54 to 149C (-65 to 300F)
79356 - 50 ml
Loctite 592
Hernon 920
Omnifit 790
White Pipe sealant with Teflon for moderate
pressures.
Temp. range: -54 to 149C (-65 to 300F)
26695 - 6 ml
73289 - 50 ml
Loctite 515
Hernon 910
Omnifit 10
Purple Form-in-place gasket for flexible joints.
Fills gaps up to 1.3 mm (0.05)
Temp. range: -54 to 149C (-65 to 300F)
70735 - 50 ml
Threadlockers and Sealants
Threadlockers and Sealants (continued)
Threadlocking adhesives and sealants are specified throughout this
manual by a notation of S plus a number (S#) and should be used
where indicated. Threadlocking compounds normally break down at
temperatures above 175C (350F). If a screw or bolt is hard to
remove, heat it using a small propane torch to break down the sealant.
When applying sealants, follow instructions on container. The sealants
listed are recommended for use on Wacker equipment.
TYPE
( ) = Europe COLOR USAGE
PART NO.
SIZE
Loctite 496
Hernon 110
Omnifit Sicomet 7000
Clear Instant adhesive for bonding rubber, metal
and plastics; general purpose.
For gaps up to 0.15 mm (0.006)
Read caution instructions before using.
Temp. range: -54 to 82C (-65 to 180F)
52676 - 1oz.
Loctite Primer T
Hernon Primer 10
Omnifit VC Activator
Aerosol
Spray
Fast curing primer for threadlocking,
retaining and sealing compounds. Must
be used with stainless steel hardware.
Recommended for use with gasket
sealants.
2006124-6 oz.
Torque Values
Torque Values
Metric Fasteners (DIN)
TORQUE VALUES (Based on Bolt Size and Hardness) WRENCH SIZE
Size Nm ft.lb. Nm ft.lb. Nm ft.lb. Metric Inch Metric Inch
M3 1.2 *11 1.6 *14 2.1 *19 5.5 7/32 2.5
M4 2.9 *26 4.1 *36 4.9 *43 7 9/32 3
M5 6.0 *53 8.5 6 10 7 8 5/16 4
M6 10 7 14 10 17 13 10 5
M8 25 18 35 26 41 30 13 1/2 6
M10 49 36 69 51 83 61 17 11/16 8
M12 86 63 120 88 145 107 19 3/4 10
M14 135 99 190 140 230 169 22 7/8 12
M16 210 155 295 217 355 262 24 15/16 14
M18 290 214 405 298 485 357 27 1-1/16 14
M20 410 302 580 427 690 508 30 1-1/4 17
1 ft.lb. = 1.357 Nm * = in.lb. 1 inch = 25.4 mm
8.8 10.9 12.9
Torque Values
Torque Values (continued)
Inch Fasteners (SAE)
Size Nm ft.lb. Nm ft.lb. Nm ft.lb. Metric Inch Metric Inch
No.4 0.7 *6 1.0 *14 1.4 *12 5.5 1/4 3/32
No.6 1.4 *12 1.9 *17 2.4 *21 8 5/16 7/64
No.8 2.5 *22 3.5 *31 4.7 *42 9 11/32 9/64
No.10 3.6 *32 5.1 *45 6.8 *60 3/8 5/32
1/4 8.1 6 12 9 16 12 7/16 3/32
5/16 18 13 26 19 33 24 13 1/2 1/4
3/8 31 23 45 33 58 43 9/16 5/16
7/16 50 37 71 52 94 69 16 5/8 3/8
1/2 77 57 109 80 142 105 19 3/4 3/8
9/16 111 82 156 115 214 158 13/16
5/8 152 112 216 159 265 195 24 15/16 1/2
3/4 271 200 383 282 479 353 1-1/8 5/8
1 ft.lb. = 1.357 Nm * = in.lb. 1 inch = 25.4 mm
Wacker Construction Equipment AG Preuenstrae 41 D-80809 Mnchen Tel.: +49-(0)89-3 54 02 - 0 Fax: +49 - (0)89-3 54 02-3 90
Wacker Corporation P.O. Box 9007 Menomonee Falls, WI 53052-9007 Tel. : (262) 255-0500 Fax: (262) 255-0550 Tel. : (800) 770-0957
Wacker Asia Pacific Operations Skyline Tower, Suite 2303, 23/F 39 Wang Kwong Road, Kowloon Bay, Hong Kong Tel. +852 2406 60 32 Fax: +852 2406 60 21