Kubota M100GX Instruction manual

M100GX,M110GX,M126GX,
M128GX,M128GX-FS,
M135GX,M135GX-FS
WORKSHOP MANUAL
TRACTOR
KiSC issued 03, 2016 A

TO THE READER
This Workshop Manual tells the servicing personnel about the mechanism, servicing and
maintenance of the M100GX, M110GX, M126GX, M128GX, M128GX-FS, M135GX and M135GX-FS. It
contains 4 parts: "Information", "General", "Mechanism" and "Servicing".
Information
This section primarily contains information below.
• Safety First
• Safety Decal
• Specification
• Dimension
General
This section primarily contains information below.
• Engine Identification
• Model Identification
• General Precautions
• Maintenance Check List
• Check and Maintenance
• Special Tools
Mechanism
This section contains information on the structure and the function of the unit. Before you continue
with the subsequent sections, make sure that you read this section.
Refer to the latest version of Workshop Manual (Code No. 9Y021-01870 / 9Y021-18200) for the
diesel engine / tractor mechanism that this workshop manual does not include.
Servicing
This section primarily contains information below.
• Troubleshooting
• Servicing Specifications
• Tightening Torques
• Checking, Disassembling and Servicing
Regarding the servicing of Common Rail System (CRS), refer to "DIAGNOSIS MANUAL"
(9Y120-01920, 9Y120-01860).
Regarding the servicing of Diesel Particulate Filter (DPF), refer to "DIESEL PARTICULATE FILTER
HANDLING MANUAL" (9Y121-08130).
All illustrations, photographs and specifications contained in this manual are of the newest
information available at the time of publication.
KUBOTA reserves the right to change all information at any time without notice.
Since this manual includes many models, information or illustrations and photographs can show
more than one model.
August, 2012
© KUBOTA Corporation 2012
KiSC issued 03, 2016 A

Record of Revisions
For pdf, use search function {Search word} to find all the revised locations.
Last digit
of the
Code No.
Issue
month Main Revised Point and Corrective Measures {Search word} Reference
Page
22014.07 • Correct specifications
• Adding the informations (DPF regeneration system of Default
Version)
• Adding the information (When reassembling)
• Correcting the tightening torque
• Correcting tightening torque
• Correcting tightening torque
• Correcting the flow rate
• Correcting the relief pressure
• Correcting the clearance
• Correcting errors of DTC (Diagnostic Trouble Code)
• Adding the informations
• Correcting errors
• Adding Tightening torque
I-21, I-22,
I-26
1-M42
2-S47,
7-S17
2-S50
3-S3
3-S5
7-S3,7-S6,
7-S8,
7-S10
7-S4,
7-S10
7-S26
8-S12,
8-S16
8-S17
8-S100,
8-S101,
8-S102,
8-S103,
8-S104
9-S8,
9-S55
32015.03 • Changing the title from "M100GX, M110GX, M126GX, M135GX,
M135GX-FS" to "M100GX, M110GX, M126GX, M128GX,
M128GX-FS, M135GX, M135GX-FS"
• Adding M100GX, M128GX, M128GX-FS for Europe
• Adding the maintenance for Europe
–
42015.07 • Balancer shaft bearing replacing tool changed. G-122,
G-124,
G-125,
G-126,
1-S145
52015.11 • Wrong Correction
The topic "Adjusting Air Conditioner Belt Tension [M100GX,
M110GX]" was moved to [4] CHECK POINTS OF EVERY 100
HOURS from [5] CHECK POINTS OF EVERY 200 HOURS G-31
• Wrong Correction
Rated pressure for hydraulic flow test was corrected. 7-S3, 7-S4,
7-S6,
7-S8
• Wrong Correction
Engine speed as a condition for checking relief valve setting
pressure was corrected.
7-S4,
7-S10
KiSC issued 03, 2016 A

5 2015.11 • Wrong Correction
Additional line was drawn in the electric circuit because a wiring
between battery and starter was missed in the previouse circuit.
Reference page: The diagram at the end of the book.
8-M1,
8-M2,
8-M3,
8-M4,
8-M28,
8-M33
• Wrong Correction
Correct:
Black/White wiring connects to terminal 5 of main key switch.
Reference page: The diagram at the end of the book.
8-M1,
8-M2,
8-M3,
8-M4,
8-S93,
8-S94
• Wrong Correction
Terminal no. of hand throttle lever sensor was corrected.
Reference page: The diagram at the end of the book. 8-M10
• Wrong Correction
Wiring color between shuttle rotation sensor and main ECU was
corrected.
Reference page: The diagram at the end of the book. 8-M10
• Wrong Correction
Electric circuit for front wiper motor was corrected.
Reference page: The diagram at the end of the book. 8-M11
• Wrong Correction
Correct:
(7) Glow Relay, (8) Starter Relay 8-M19
• Wrong Correction
Correct:
(1) Turn Signal Relay LH, (4) Turn Signal Relay Relay RH 8-M26
• Wrong Correction
E-R30 Unload Solenoid --> E-H30 Unload Solenoid 8-S12
• Wrong Correction
"Fail safe control or symptom caused by error" for the item ""N"
blinks at range shift display (2)" was corrected
8-S17
• Wrong Correction
Item no. 64 is "Suspension pressure sensor".
Item no. 65 is "Suspension stroke sensor". 8-S69
• Topic "Sensor Resistance" was added. 8-S108
• Wrong Correction
Correct:
Voltage across the terminal 1 - chassis is approx. battery voltage. 8-S112
• Topic "Temperature Sensor (Build in Air Flow Sensor) Resistance"
was added. 8-S115
• Wrong Correction
Correct:
Wiring color for terminal 1 is Blue/Yellow 8-S122
• Wrong Correction
Correct:
Terminals to measure the hand throttle lever sensor resistance are
terminal 2-3 and terminal 2-4 8-S122
Lastdigit
of the
Code No.
Issue
month Main Revised Point and Corrective Measures {Search word} Reference
Page
KiSC issued 03, 2016 A

5 2015.11 • Table for switch continuity check was changed. 8-S124,
8-S125
• Wrong Correction
Condition for checking connector voltage was corrected. 8-S135
• Wrong Correction
Correct:
Wiring color for terminal 1 is Red/Green
Wiring color for terminal 2 is Black
Wiring color for terminal 3 is Gray/Blue
8-S145
• Wrong Correction
Wiring color for checking connector voltage is Light Green/Red 8-S146
• Wrong Correction
Correct:
Wiring color for terminal 2 is Green/Orange
Wiring color for terminal 3 is Red/Black 8-S153
• Wrong Correction
Correct:
Wiring color for terminal 1 is Red/White
Wiring color for terminal 2 is White/Violet
Wiring color for terminal 3 is Black/White
8-S155
• Wrong Correction
Resistance value in the table was corrected. 8-S161
• Wrong Correction
Terminal No. in the figure was corrected. 8-S165
• Wrong Correction
Correct:
(1) Turn Signal Relay LH, (2) Turn Signal Relay Relay RH 8-S174
• Topic "(3) B2 Power Relay" was added 8-S190
• Wrong Correction
Relay location in the figure was corrected. 9-M8
• Wrong Correction
Table for connector voltage was corrected. 9-S34
• Wrong Correction
Table for connector voltage was corrected. 9-S35
• Wrong Correction
Table for switch continuity check was corrected. 9-S35
• The topic "(3) Wiper Motor" was changed to "(3) Front Wiper Motor". 9-S36
• The topic "(4) Rear Wiper Motor" was added. 9-S37
• The topic "(5) Washer Tank Motor" was added. 9-S38
6 2016.03 • Information Update
Additional fan belt tension information. G-26
• Wrong Correction
Hydraulic pump specification was corrected. 7-S3,
7-S4,
7-S6,
7-S8
Last digit
of the
Code No.
Issue
month Main Revised Point and Corrective Measures {Search word} Reference
Page
KiSC issued 03, 2016 A

I INFORMATION
KiSC issued 03, 2016 A

CONTENTS
1. SAFETY FIRST ..............................................................................................................................I-1
2. SAFETY DECALS ..........................................................................................................................I-4
[1] DANGER, WARNING AND CAUTION LABELS ......................................................................I-4
(1) For North America Model ...................................................................................................I-4
(2) For Oceania Model...........................................................................................................I-10
[2] PICTORIAL SAFETY LABELS...............................................................................................I-16
(1) For Europe Model.............................................................................................................I-16
3. SPECIFICATIONS........................................................................................................................I-21
[1] FOR NORTH AMERICA MODEL...........................................................................................I-21
[2] FOR EUROPE MODEL..........................................................................................................I-22
[3] FOR OCEANIA MODEL.........................................................................................................I-26
4. TRAVELING SPEEDS..................................................................................................................I-27
[1] FOR NORTH AMERICA MODEL...........................................................................................I-27
[2] FOR EUROPE MODEL..........................................................................................................I-28
[3] FOR OCEANIA MODEL.........................................................................................................I-29
5. DIMENSIONS...............................................................................................................................I-30
[1] FOR NORTH AMERICA MODEL...........................................................................................I-30
[2] FOR EUROPE MODEL..........................................................................................................I-31
[3] FOR OCEANIA MODEL.........................................................................................................I-32
INFORMATION
KiSC issued 03, 2016 A

INFORMATION
M100GX, M110GX, M126GX, M128GX, M128GX-FS, M135GX, M135GX-FS, WSM
I-1
1. SAFETY FIRST
WSM000001INI0001US1
BEFORE YOU START SERVICE
• Read all instructions and safety instructions in this
manual and on your machine safety decals.
• Clean the work area and machine.
• Park the machine on a stable and level ground, and
set the parking brake.
• Lower the implement to the ground.
• Stop the engine, then remove the key.
• Disconnect the battery negative cable.
• Hang a "DO NOT OPERATE" tag in the operator
station. WSM000001INI0010US0
START SAFELY
• Do not do the procedures below when you start the
engine.
– short across starter terminals
– bypass the safety start switch
• Do not alter or remove any part of machine safety
system.
• Before you start the engine, make sure that all shift
levers are in neutral positions or in disengaged
positions.
• Do not start the engine when you stay on the ground.
Start the engine only from operator's seat.
WSM000001INI0015US0
SAFETY FIRST
• This symbol, the industry's "Safety Alert Symbol", is used throughout this manual and on labels on the
machine itself to warn of the possibility of personal injury. Read these instructions carefully.
• It is essential that you read the instructions and safety regulations before you try to repair or use this
unit.
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, could result in minor or moderate
injury.
IMPORTANT
• Indicates that equipment or property damage could result if instructions are not followed.
NOTE
• Gives helpful information.
KiSC issued 03, 2016 A

INFORMATION
M100GX, M110GX, M126GX, M128GX, M128GX-FS, M135GX, M135GX-FS, WSM
I-2
OPERATE SAFELY
• Do not use the machine after you consume alcohol
or medication or when you are tired.
• Put on applicable clothing and safety equipment.
• Use applicable tools only. Do not use alternative
tools or parts.
• When 2 or more persons do servicing, make sure
that you do it safely.
• Do not operate below the machine that only a jack
holds. Always use a safety stand to hold the
machine.
• Do not touch the hot parts or parts that turn when the
engine operates.
• Do not remove the radiator cap when the engine
operates, or immediately after it stops. If not, hot
water can spout out from the radiator. Only remove
the radiator cap when it is at a sufficiently low
temperature to touch with bare hands. Slowly loosen
the cap to release the pressure before you remove it
fully.
• Released fluid (fuel or hydraulic oil) under pressure
can cause damage to the skin and cause serious
injury. Release the pressure before you disconnect
hydraulic or fuel lines. Tighten all connections before
you apply the pressure.
• Do not open a fuel system under high pressure.
The fluid under high pressure that stays in fuel lines
can cause serious injury. Do not disconnect or repair
the fuel lines, sensors, or any other components
between the fuel pump and injectors on engines with
a common rail fuel system under high pressure.
• Put on an applicable ear protective device (earmuffs
or earplugs) to prevent injury against loud noises.
• Be careful about electric shock. The engine
generates a high voltage of more than DC100 V in
the ECU and is applied to the injector.
WSM000001INI0012US0
PREVENT A FIRE
• Fuel is very flammable and explosive under some
conditions. Do not smoke or let flames or sparks in
your work area.
• To prevent sparks from an accidental short circuit,
always disconnect the battery negative cable first
and connect it last.
• The battery gas can cause an explosion. Keep the
sparks and open flame away from the top of battery,
especially when you charge the battery.
• Make sure that you do not spill fuel on the engine.
WSM000001INI0005US0
KiSC issued 03, 2016 A

INFORMATION
M100GX, M110GX, M126GX, M128GX, M128GX-FS, M135GX, M135GX-FS, WSM
I-3
KEEP A GOOD AIRFLOW IN THE WORK AREA
• If the engine is in operation, make sure that the area
has good airflow. Do not operate the engine in a
closed area. The exhaust gas contains poisonous
carbon monoxide. WSM000001INI0006US0
DISCARD FLUIDS CORRECTLY
• Do not discard fluids on the ground, down the drain,
into a stream, pond, or lake. Obey related
environmental protection regulations when you
discard oil, fuel, coolant, electrolyte and other
dangerous waste. WSM000001INI0007US0
PREVENT ACID BURNS
• Keep electrolyte away from your eyes, hands and
clothing. Sulfuric acid in battery electrolyte is
poisonous and it can burn your skin and clothing and
cause blindness. If you spill electrolyte on yourself,
clean yourself with water, and get medical aid
immediately. WSM000001INI0008US0
PREPARE FOR EMERGENCIES
• Keep a first aid kit and fire extinguisher ready at all
times.
• Keep the emergency contact telephone numbers
near your telephone at all times.
WSM000001INI0009US0
KiSC issued 03, 2016 A

INFORMATION
M100GX, M110GX, M126GX, M128GX, M128GX-FS, M135GX, M135GX-FS, WSM
I-4
2. SAFETY DECALS
[1] DANGER, WARNING AND CAUTION LABELS
(1) For North America Model
The following safety decals are installed on the machine. If a decal becomes damaged, illegible or is not
on the machine, replace it. The decal part number is listed in the parts list. WSM000001INI0013US0
9Y1210684INI0001US0
KiSC issued 03, 2016 A

INFORMATION
M100GX, M110GX, M126GX, M128GX, M128GX-FS, M135GX, M135GX-FS, WSM
I-5
9Y1210684INI0002US0
KiSC issued 03, 2016 A

INFORMATION
M100GX, M110GX, M126GX, M128GX, M128GX-FS, M135GX, M135GX-FS, WSM
I-6
9Y1210684INI0003US0
KiSC issued 03, 2016 A

INFORMATION
M100GX, M110GX, M126GX, M128GX, M128GX-FS, M135GX, M135GX-FS, WSM
I-7
9Y1210684INI0004US0
KiSC issued 03, 2016 A

INFORMATION
M100GX, M110GX, M126GX, M128GX, M128GX-FS, M135GX, M135GX-FS, WSM
I-8
9Y1210684INI0005US0
KiSC issued 03, 2016 A

INFORMATION
M100GX, M110GX, M126GX, M128GX, M128GX-FS, M135GX, M135GX-FS, WSM
I-9
9Y1210684INI0006US0
CARE OF DANGER, WARNING AND CAUTION LABELS
1. Keep danger, warning and caution labels clean and free from obstructing material.
2. Clean danger, warning and caution labels with soap and water, dry with a soft cloth.
3. Replace damaged or missing danger, warning and caution labels with new labels.
4. If a component with danger, warning and caution label(s) affixed is replaced with new part, make sure new label(s)
is (are) attached in the same location(s) as the replace component.
5. Mount new danger, warning and caution labels by applying on a clean dry surface and pressing any bubbles to
outside edge. 9Y1210684INI0007US0
KiSC issued 03, 2016 A

INFORMATION
M100GX, M110GX, M126GX, M128GX, M128GX-FS, M135GX, M135GX-FS, WSM
I-10
(2) For Oceania Model
The following safety decals are installed on the machine. If a decal becomes damaged, illegible or is not
on the machine, replace it. The decal part number is listed in the parts list. WSM000001INI0013US0
9Y1210684INI0021US0
KiSC issued 03, 2016 A

INFORMATION
M100GX, M110GX, M126GX, M128GX, M128GX-FS, M135GX, M135GX-FS, WSM
I-11
9Y1210684INI0022US0
KiSC issued 03, 2016 A

INFORMATION
M100GX, M110GX, M126GX, M128GX, M128GX-FS, M135GX, M135GX-FS, WSM
I-12
9Y1210684INI0023US0
KiSC issued 03, 2016 A

INFORMATION
M100GX, M110GX, M126GX, M128GX, M128GX-FS, M135GX, M135GX-FS, WSM
I-13
9Y1210684INI0024US0
KiSC issued 03, 2016 A