Komatsu D85EX-15, D85PX-15 User Manual

EEAM022804

Operation &
Maintenance Manual

D85EX

D85PX

BULLDOZER

SERIAL NUMBER

D85EX-15 - 10001
D85PX-15 - 1001

and up

and up

-15

-15

WARNING

Unsafe use of this machine may cause serious injury or
death. Operators and maintenance personnel must read
this manual before operating or maintaining this
machine. This manual should be kept inside the cab for
reference and periodically reviewed by all personnel who
will come into contact with the machine.

FOREWORD

11

FOREWORD FOREWORD

FOREWORD 0.

This manual provides rules and guidelines which will help you use this machine safely and effectively. The pre­cautions in this manual must be followed at all times when performing operation and maintenance. Most acciden ts
are caused by the failure to follow fundamental safety rules for the operation and maintenance of machi nes. Acci­dents can be prevented by knowing beforehand conditio ns that may cause a haz ard when performing op eration
and maintenance.

WARNING

Operators and maintenance personnel must always do as follows before beginning operation or mainte­nance.

Always be sure to read and understand this manual thoroughly before performing operation and

maintenance.

Read the safety messages given in this manual and the safety labels affixed to the machine thor-

oughly and be sure that you understand them fully.

Keep this manual at the storage location for the Operation and M aintenance Manual given below, and
have all personnel read it periodically.

If this manual has been lost or has become dirty and can not be read, request a replacement manual
immediately from Komatsu or your Komatsu distributor.

If you sell the machine, be sure to give this manual to the new owners together with the machine.

Komatsu delivers machines that comply with all applicable regulations and standards of the country to
which it has been shipped. If this machine has been purchased in another country or purchased from
someone in another country, it may lack certain safety devices and specifications that are necessary for
use in your country. If there is any question about whether your product complies with the applicable
standards and regulations of your country, consult Komatsu or your Komatsu distributor before operat­ing the machine.

Location to Keep Operation & Maintenance Manual
In Door Pocket Inside of Cab Door

1-2

FOREWORD SAFETY INFORMATION

SAFETY INFORMATION 0.

To enable you to use this machine safely, safety precautions and labels are given in this manual and affixed to the
machine to give explanations of situations involving potential hazards and of the methods of avoiding such situa­tions.

Signal words

The following signal words are used to inform you that there is a potential hazardous situation that may lead to per­sonal injury or damage.
In this manual and on machine labels, the following signal words are used to express the potential level of hazard.

DANGER

WARNING

CAUTION

Example of safety message using signal word

Indicates an imminently hazardous situation which, if not avoided, will result in death
or serious injury.

Indicates a potentially hazardous situation which, if not avoided, could result in death
or serious injury.

Indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury. This word is used also to alert against unsafe practices that may
cause property damage.

WARNING

When standing up from the operator's seat, always place the safety lock lever in the LOCK position.
If you accidentally touch the control levers when they are not locked, this may cause a serious injury or
death.

Other signal words

In addition to the above, the following signal words are used to indicate precaution s that shou ld be followed to pro­tect the machine or to give information that is useful to know.

NOTICE
REMARKS

This word is used for precautions that must be taken to avoid actions which could shorten
the life of the machine.

This word is used for information that is useful to know.

1-3

SAFETY INFORMATION FOREWORD

Safety labels
Safety labels are affixed to the machine to inform the operator or maintenance worker on the spot when carrying
out operation or maintenance of the machine that may involve hazard.
This machine uses “Safety labels using words“ and “Safety labels using pictograms“ to indicate safety pr ocedur es.

Example of safety label using words

Part No.

Safety labels using pictogram

Safety pictograms use a picture to expre ss a level of hazard­ous condition equivalent to the signal word. These safety picto­grams use pictures in order to let the operator or maintenance
worker understand the level and type of h azardous condition at
all times. Safety pictograms show the type of hazardous condi­tion at the top or left side, and the method of avoiding the haz­ardous condition at the bottom or right side. In addition, the
type of hazardous condition is displayed inside a triangle and
the method of avoiding the hazardous condition is shown
inside a circle.

Part No

Komatsu cannot predict every circumstance that might involve a potential hazard in operation and maintena nce.
Therefore, the safety messages in this manual and on the machine may not include all po ssible safety precau­tions.
If any procedures or actions not specifically recommended or allowed in this manual are used, it is your responsi­bility to take the necessary steps to ensure safety.
In no event should you engage in prohibited uses or actions described in this manual.

The explanations, values, and illustrations in this manual were prepared based on the latest information available
at that time. Continuing improvements in the design of this machine can lead to changes in detail which may not
be reflected in this manual. Consult Komatsu or your Komatsu distributor for the latest available information of
your machine or for questions regarding information in this manual.

The numbers in circles in the illustrations correspond to the numbers in ( ) in the text. (For example: 1 -> (1))

1-4

FOREWORD SAFETY INFORMATION

Noise emission levels 0.

Two labels ind icating the machine noise level a re affixed on the
machine.
Sound pressure level at the operator's station, measured

according to ISO6396 (Dynamic test method, simulated
working cycle)

Sound power level emitted by the machine, measured

according to ISO 6395 (Dynamic test method, simulated
working cycle). This is the guaranteed value as specified in
European directive 2000/14/EC.

Vibration levels 0.

When used for its intended purpose, levels of vibration for the earth-moving machine transmitted from the opera­tor’s seat are lower than or equal to the tested vibrations for the relative machinery class in compliance with ISO

7096.
If equipped with air suspension seat

The actual acceleration value for the hands and arms is less than or equal to 2.5 m/s². The actual acceleratio n
value for the body is less than or equal to 0.5 m/s².

If equipped with mechanical suspension seat
The actual acceleration value for the hands and arms is less than or equal to 2.5 m/s². The actual acceleratio n
value for the body is 0.52 m/s².

These values were determined using a representative machine and measured during the typical operating condi­tion indicated below according to the measurement procedures that are defined in the standards ISO 2631/1 and
ISO 5349.

1-5

SAFETY INFORMATION FOREWORD

Operating condition:

(WHEEL LOADER:) V-shape loading
(HYDRAULIC EXCAVATORS:) Excavating (Digging-loading-rotating-unloading-rotating)
(TRACTOR DOZER:) Dozing and spreading material through forward/reversing motion
(Rigid/Articulate dumper:) Work cycle (including waiting, travelling, loading, travelling with load, unloading, and

travelling without load)

Guide to Reduce Vibration Levels on Machine

The following guides can help an operator of this machine to reduce the whole body vibration levels:

1. Use the correct equipment and attachments.

2. Maintain the machine according to this manual

Tire pressures (for wheeled machines), tension of crawler (for crawler machines)
Brake and steering systems
Controls, hydraulic system and linkages

3. Keep the terrain where the machine is working and traveling in good condition

Remove any large rocks or obstacles
Fill any ditches and holes
Site manager should provide machine operators with machine and schedule time to maintain terrain condi-

tions

4. Use a seat that meets ISO 7096 and keep the seat maintained and adjusted

Adjust the seat and suspension for the weight and size of the operator
Wear seat belt
Inspect and maintain the seat suspension and adju stment mechanisms

5. Steer, brake, accelerate, shift gears (for wheeled machines), and move the attachment levers and pedals
slowly so that the machine moves smoothly

6. Adjust the machine speed and travel path to minimize the vibration level

When pushing with bucket or blade, avoid sudden loading; load gradually
Drive around obstacles and rough terrain conditions
Slow down when it is necessary to go over rough terrain
Make the curve radius of traveling path as large as possible
Travel at low speed when traveling around sharp curves

7. Minimize vibrations for long work cycle or long distance traveling

Reduce speed to prevent bounce
Transport machines long distances between worksites

8. The following guidelines can be effective to minimize risks of low back pain

Operate the machine only when you are in good health.
Provide breaks to reduce long periods of sitting in the same posture
Do not jump down from the cab or machine
Do not repeatedly handle and lift loads

1-6

FOREWORD INTRODUCTION

INTRODUCTION 0.

This Komatsu machine is designed to be used mainly for the following work:

Dozing
Cutting into hard or frozen ground or ditching
Felling trees, removing stumps
Pushing
Ripping

For further details, see “WORK POSSIBLE USING BULLDOZER ( 3-92 )“.

FRONT/REAR, LEFT/RIGHT DIRECTIONS OF MACHINE 0.

Front

Left

Operator’s seat

Rear

In this manual, the terms front, rear, left, and right refer to the travel direction as seen from the operator's seat
when the operator's seat is facing the front and the sprocket is at the rear of the machine.

Right

Sprocket

1-7

NECESSARY INFORMATION FOREWORD

NECESSARY INFORMATION 0.

When requesting service or ordering replacement parts, please inform your Komatsu distributor of the following
items.

MACHINE SERIAL NO. PLATE AND POSITION 0.

Under the front of the console box on the right side of the operator's seat.

ENGINE SERIAL NO. PLATE AND POSITION 0.

This is at the rear of the starting motor on the rights side of the engine.
(The EMISSION CONTROL INFORMATION LABEL is at the front surface of the engine oil filler on the left side of
the engine.)

EPA: Environmental Protection Agency, U.S.A.

1-8

FOREWORD NECESSARY INFORMATION

BLADE SERIAL NO. PLATE POSITION 0.

This is located at the upper right of blade back surface.

RIPPER SERIAL NO. PLATE POSITION 0.

This is located at the left side surface of ripper beam.

ROPS, FOPS NO. PLATE POSITION 0.

This is located at the top left.

FOPS

ROPS

POSITION OF SERVICE METER 0.

On top of the machine monitor

1-9

NECESSARY INFORMATION FOREWORD

TABLE OF ENTER SERIAL NO. AND DISTRIBUTOR 0.

Machine serial No.

Engine serial No.

Product Identification Number
Manufacturers name:

Address:

Distributor
Address

Phone
Service personnel for your

machine:

KOMATSU LTD.
3-6 Akasaka
Minato-ku, 101 Tokyo
Japan

1-10

FOREWORD NECESSARY INFORMATION

MACHINE SERIAL NUMBER PLATE

Valid until 31 December 2003

Model

Seriel Number

Manufacturing year

Weight

Engine power

Manuafacturer

Valid as of 1 January 2004

Seriel Number

Manufacturing year

Weight

Engine power

Komatsu Ltd. Tokyo, Japan

Produced by Komatsu Tokyo, Japan

Model

Product Identification Number

Manuafacturer

1-11

CONTENTS

CONTENTS

FOREWORD

FOREWORD.........................................................................................................................................................1-2

SAFETY INFORMATION...................................................................................................................................... 1-3

Noise emission levels ...................................... ... ... ... ... .... ... ... ... .... ..............................................................1-5

Vibration levels............................................................................................................................................ 1-5

Guide to Reduce Vibration Levels on Machine..................................................................................1-6

INTRODUCTION................................................................................................................................................... 1-7

FRONT/REAR, LEFT/RIGHT DIRECTIONS OF MACHINE....................................................................... 1-7

NECESSARY INFORMATION .............................................................................................................................1-8

MACHINE SERIAL NO. PLATE AND POSITION ....................................................................................... 1-8

ENGINE SERIAL NO. PLATE AND POSITION............................................................ ... ... .... ... .................1-8

BLADE SERIAL NO. PLATE POSITION .................................................................................................... 1-9

RIPPER SERIAL NO. PLATE POSITION...................................................................................................1-9

ROPS, FOPS NO. PLATE POSITION ........................................................................................................ 1-9

POSITION OF SERVICE METER ..............................................................................................................1-9

TABLE OF ENTER SERIAL NO. AND DISTRIBUTOR ............................................................................ 1-10

MACHINE SERIAL NUMBER PLATE . ... ... ... .... ... ... ... ... .......................................... .... ... ... ... .... ... ...............1-11

SAFETY

SAFETY................................................................................................................................................................2-2

SAFETY LABELS.................................................................................................................................................2-4

POSITIONS OF SAFETY PICTOGRAMS ..................................................................................................2-4

SAFETY LABELS ........................ ... .... ... ... ... .... ...................................... .... ... ... ... ... .... .................................2-5

GENERAL PRECAUTIONS .................................................................................................................................2-9

PRECAUTIONS FOR OPERATION................................................................................................................... 2-16

BEFORE STARTING ENGINE ........................................... ... ... .... .......................................... ... ... ............2-16

OPERATION............................................................................................................................................. 2-17

TRANSPORTATION................................................................................................................................. 2-20

BATTERY .................................................................................................................................................2-20

TOWING ................................................................................................................................................... 2-22

PRECAUTIONS FOR MAINTENANCE.............................................................................................................. 2-23

OPERATION

GENERAL VIEW .................................................................................................................................................. 3-2

1-12

CONTENTS

GENERAL VIEW OF MACHINE............................................................ ... ... ... .... ... ... .................................. 3-2

GENERAL VIEW OF CONTROLS AND GAUGES..................................................................................... 3-3

EXPLANATION OF COMPONENTS.................................................................................................................... 3-5

FRONT PANEL........................................................................................................................................... 3-5

CHECK MONITOR GROUP............................................... ... .... ... ... .......................................... ........3-7

CAUTION MONITOR GROUP .......................................................................................................... 3-8

EMERGENCY CAUTION ITEMS .................................................................................................... 3-10

METER GROUP....... ... ... .......................................... .......................................... ............................. 3-12

SWITCH........................................................................................................................................... 3-16

LAMP............................................................................................................................................... 3-19

METHOD OF USING DISPLAY PANEL B (Multi-information) ........................................................ 3-21

SWITCH.................................................................................................................................................... 3-28

CONTROL LEVERS, PEDALS................................................................................................................. 3-31

DUST INDICATOR ................................................................................................................................... 3-36

FUSE BOX.. .... ... ... ... ... .... .......................................... .......................................... ...................................... 3-37

CIRCUIT BREAKER........................................................................................................................ 3-38

FUSE CAPACITY AND NAME OF CIRCUIT................................................................................... 3-38

FUSIBLE LINK...... ... ... .... ... ... .......................................... .......................................... ................................ 3-39

DOOR OPEN LOCK................................................................................................................................. 3-40

SASH GLASS INTERMEDIATE LOCK..................................................................................................... 3-40

DOOR POCKET ....................................................................................................................................... 3-41

ASHTRAY................................................................................................................................................. 3-41

CAR STEREO, HANDLING...................................................................................................................... 3-42

EXPLANATION OF COMPONENTS............................................................................................... 3-42

METHOD OF OPERATION.............................................................................................................3-47

PRECAUTION WHEN USING................................................................... ... ... ... .... ... ... ................... 3-49

AIR CONDITIONER.................................................................................................................................. 3-50

GENERAL LOCATIONS AND FUNCTION OF CONTROL PANEL .......... ... ... ... .... ... ... ... ... .... ... ... ... 3-50

METHOD OF OPERATION.............................................................................................................3-52

PRECAUTIONS WHEN USING ...................................................................................................... 3-53

SET SO THAT COLD AIR DOES NOT DIRECTLY BLOW ONTO THE GLASS SURFACE.......... 3-53

CHECKS DURING OFF-SEASON.................................................................................................. 3-53

PROCEDURE FOR REPLACING RECEIVER................................................................................ 3-53

CHECK COMPRESSOR BELT TENSION AND REFRIGERANT (GAS) LEVEL............................ 3-54

CLEANING AIR FILTER.................................................................................................................. 3-54

ACCUMULATOR, HANDLING.................................................................................................................. 3-54

METHOD OF RELEASING PRESSURE IN OPERATING CIRCUIT ON MACHINE EQUIPPED WITH

ACCUMULATOR............................................................................................................................. 3-54

OPERATION....................................................................................................................................................... 3-55

CHECK BEFORE STARTING ENGINE, ADJUST.................................................................................... 3-55

WALK-AROUND CHECK ................................................................................................................ 3-55

CHECK BEFORE STARTING...................................................................... ... ... .... ... ... ... ................ 3-56

ADJUSTMENT................................................................................................................................. 3-65

OPERATIONS AND CHECKS BEFORE STARTING ENGINE....................................................... 3-69

STARTING ENGINE....... ... ... ... .... ... .......................................... ... ... .......................................................... 3-71

NORMAL STARTING................................................................................................................

...... 3-71

1-13

CONTENTS

STARTING IN COLD WEATHER.................................................................................................... 3-72

OPERATIONS AND CHECKS AFTER STARTING ENGINE...................................................................3-75

BREAKING IN THE MACHINE........................................................................................................ 3-75

NORMAL OPERATION ... ... ... .... ... ... ... .......................................... .......................................... .........3-75

IN COLD AREAS................................................ .... ... ... .......................................... ... .... ... ...............3-77

STOPPING ENGINE . ... ... ... ................................................................................. ...................................... 3-78

CHECK AFTER STOPPING ENGINE ......................................................................................................3-78

MOVING MACHINE OFF.......................................................................................................................... 3-79

STOPPING MACHINE. ... ... .... ... ... .......................................... .......................................... .........................3-81

SHIFTING GEAR......................................................................................................................................3-82

SHIFTING BETWEEN FOEWARD AND REVERSE ................................................................................3-84

STEERING MACHINE.............................................................................................................................. 3-86

NORMAL TURNING............................... ... ... ... ... .... ...................................... .... ... ... ... .... ... ... ............3-86

TURNING WHILE DESCENDING A SLOPE............................. ... .... ... ... ... ... .... ... ... ... .... ... ... ... ... ......3-87

PRECAUTIONS FOR OPERATION .........................................................................................................3-88

PAY ATTENTION TO GAUGES...................................................................................................... 3-88

PERMISSIBLE WATER DEPTH...................................................................................................... 3-88

PRECAUTIONS WHEN TRAVELING UP OR DOWN HILLS..........................................................3-88

PRECAUTIONS ON SLOPE ...........................................................................................................3-88

METHOD OF USING BRAKES ........................................................................................... ............ 3-88

PROHIBITED TO KEEP THE DOOR OPEN DURING OPERATIONS ...........................................3-89

IT IS PROHIBITED TO MODIFY THE CAB GLASS IN ANY WAY THAT WILL OBSTRUCT THE VIEW

3-89

PRECAUTIONS FOR BLIND SPOTS CAUSED BY CAB STAY AND ROPS STAY.......................3-89

PARKING MACHINE ............................................................................. .... ... ... ... ... .... ...............................3-89

CHECK AFTER FINISHING WORK ... .......................................... ... ... ... .... ... ... ......................................... 3-91

LOCKING.................................................................................................................................................. 3-91

WORK POSSIBLE USING BULLDOZER ................................................................................................. 3-92

DOZING........................................................................................................................................... 3-92

CUTTING INTO HARD OR FROZEN GROUND OR DITCHING....................................................3-92

FELLING TREES, REMOVING STUMPS .......................................................................................3-92

PUSHER OPERATIONS .................................................................................................................3-92

SMOOTHING...................................................................................................................................3-93

ADJUSTING POSTURE OF WORK EQUIPMENT................................................................................... 3-94

BLADE ADJUSTMENT....................................................................................................................3-94

However, the more the digging angle is changed, the more the chang e become s in the am oun t of tilt on th e

left and right sides provided by the tilt cylinder. .. ... ... ... .... ... ... ... .... .......................................... ... ...............3-95

ADJUSTING RIPPER......................................................................................................................3-96

TIPS FOR LONGER UNDERCARRIAGE LIFE ........................................................................................ 3-98

OPERATION METHOD...............................................................................................................

INSPECTION AND ADJUSTING.....................................................................................................3-98

INSPECTION AND REPAIR............................................................................................................3-99

....3-98

TRANSPORTATION.........................................................................................................................................3-100

TRANSPORTATION PROCEDURE.......................................................................................................3-100

LOADING, UNLOADING WORK ............................................................................................................3-100

PRECAUTIONS FOR LOADING ............................................................................................................3-100

METHOD OF LIFTING MACHINE.......................................................................................................... 3-101

1-14

CONTENTS

PRECAUTIONS FOR TRANSPORTATION ................... ... .... .......................................... ... ... ... ... .... ... ... . 3-102

TRAVELING ON ROADS .................................................. .... ... ... ... .... ... ... ... ... .... .................................... 3-102

REMOVAL OF CAB................................................................................................................................ 3-102

INSTALLATION OF CAB........................................................................................................................ 3-103

INSTALLATION OF ROPS..................................................................................................................... 3-103

COLD WEATHER OPERATION...................................................................................................................... 3-104

PRECAUTIONS FOR LOW TEMPERATURE.................................................... ... ... ... .... ... ... ... ... .... ... ... . 3-104

FUEL AND LUBRICANTS .............................................................................................................3-104

COOLANT ..................................................................................................................................... 3-104

BATTERY...................................................................................................................................... 3-104

AFTER COMPLETION OF WORK......................................................................................................... 3-105

AFTER COLD WEATHER...................................................................................................................... 3-105

LONG-TERM STORAGE.................................................................................................................................. 3-106

BEFORE STORAGE............................................................................................................................... 3-106

DURING STORAGE............................................................................................................................... 3-106

AFTER STORAGE.................................................................................................................................. 3-106

TROUBLESHOOTING...................................................................................................................................... 3-107

AFTER RUNNING OUT OF FUEL.......................................................................................................... 3-107

PROCEDURE FOR BLEEDING AIR............................................................................................. 3-107

METHOD OF TOWING MACHINE.........................................................................................................3-108

IF BATTERY IS DISCHARGED.............................................................................................................. 3-109

STARTING ENGINE WITH BOOSTER CABLE ............................................................................ 3-109

OTHER TROUBLE ................................................................................................................................. 3-112

ELECTRICAL SYSTEM................................................................................................................. 3-112

MONITOR PANEL......................................................................................................................... 3-113

CHASSIS....................................................................................................................................... 3-114

ENGINE......................................................................................................................................... 3-116

MAINTENANCE

GUIDES TO MAINTENANCE............................................................................................................................... 4-2

OUTLINES OF SERVICE..................................................................................................................................... 4-5

HANDLING OIL, FUEL, COOLANT, AND PERFORMING OIL CLINIC ............................................. ... ... .. 4-5

OIL..................................................................................................................................................... 4-5

FUEL.................................................................................................................................................. 4-5

COOLANT ......................................................................................................................................... 4-5

GREASE............................................................................................................................................ 4-6

CARRYING OUT KOWA (Komatsu Oil Wear Analysis) .................................................................... 4-6

STORING OIL AND FUEL................................................................................................................. 4-7

FILTERS............................................................................................................................................ 4-7

OUTLINE OF ELECTRIC SYSTEM............................................................................................................ 4-7

WEAR PARTS LIST............................................................................................................................................. 4-8

WEAR PARTS LIST.................................................................................................................................... 4-8

1-15

CONTENTS

USE OF FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE....................... 4-9

PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS ...........................................................4-9

STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS.....................................................................4-13

TORQUE LIST..........................................................................................................................................4-13

PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS .......................................................................... 4-14

SAFETY CRITICAL PARTS................................... ... ... .... ... ... ... .... ... ... ... ................................................... 4-15

MAINTENANCE SCHEDULE CHART ............................................................................................................... 4-17

MAINTENANCE SCHEDULE CHART......................................................................................................4-17

INTIAL 250 HOURS SERVICE(ONLY AFTER THE FIRST 250 HOURS) ...................................... 4-17

WHEN REQUIRED.......................................................................................................................... 4-17

CHECK BEFORE STARTING .........................................................................................................4-17

EVERY 250 HOURS SERVICE....................................................................................................... 4-17

EVERY 500 HOURS SERVICE....................................................................................................... 4-17

EVERY 1000 HOURS SERVICE............................ .........................................................................4-18

EVERY 2000 HOURS SERVICE............................ .........................................................................4-18

EVERY 4000 HOURS SERVICE............................ .........................................................................4-18

EVERY 8000 HOURS SERVICE............................ .........................................................................4-18

SERVICE PROCEDURE ....................................................................................................................................4-19

INITIAL 250 HOURS SERVICE(ONLY AFTER THE FIRST 250 HOURS)...............................................4-19

WHEN REQUIRED............................................................................. ......................................................4-19

CHECK BEFORE STARTING ......................................................................... ... ... .... ... ... ... ......................4-37

EVERY 250 HOURS SERVICE................................................................................................................ 4-38

EVERY 500 HOURS SERVICE................................................................................................................ 4-45

EVERY 1000 HOURS SERVICE.............................................................................................................. 4-49

EVERY 2000 HOURS SERVICE.............................................................................................................. 4-53

EVERY 4000 HOURS SERVICE.............................................................................................................. 4-58

EVERY 8000 HOURS SERVICE.............................................................................................................. 4-61

SPECIFICATIONS

SPECIFICATIONS................................................................................................................................................5-2

ATTACHMENTS, OPTIONS

GENERAL PRECAURIONS.................................................................................................................................6-2

PRECAUTIONS RELATED TO SAFETY ...................................................................................................6-2

SELECTION OF TRACK SHOE........................................................................................................................... 6-3

SELECTION OF TRACK SHOES...............................................................................................................6-3

PROCEDURE FOR SELECTING RIPPER POINT...............................................................................................6-4

PROCEDURE FOR SELECTING RIPPER POINT..................................................................................... 6-4

1-16

CONTENTS

CAP WITH LOCK, HANDLING............................................................................................................................ 6-5

METHOD OF OPENING AND CLOSING CAP WITH LOCK...................................................................... 6-5

INDEX

COLOPHON

1-17

CONTENTS

1-18

SAFETY

22

WARNING

Please be sure that you fully underst an d this manual an d the
precautions discribed in this manual and the safety labels
on the machine. When operating or servicing the machine,
always follow these precaustions strictly.

SAFETY SAFETY

SAFETY 0.

Safety Labels ............................................ .... ... ... ... .... .......................................... ... ... ... ........................................ 2-4

Positions of Safety Pictograms ...................................................................................................................... 2-4

Safety Labels .................................................................................................................................................2-5

General Precautions

Safety Rules................................................................................................................................................... 2-9

If Abnormalities Are Found.............................. .... ... ... ... ... .... ... ... ... .... ..............................................................2-9

Clothing and Personal Protective Items......................................................................................................... 2-9

Fire Extinguisher and First Aid Kit..................................................................................................................2-9

Fafety Features.............................................................................................................................................. 2-9

Keep Machine Clean......................................................................................................................................2-9

Inside Operator's Compartment................................................................................................................... 2-10

Always Apply Lock When Leaving Operator's Seat................................................................... ... ... ... .........2-10

Handrails and Steps........................................ .... ... ... .......................................... ... ... ................................... 2-11

Mounting and Dismounting .......................................................................................................................... 2-11

No People on Attachments .......................................................................................................................... 2-11

Prevention of Burns...................................................................................................................................... 2-12

Fire Prevention.............................................................................................................................................2-12

Action If Fire Occurs..................................................................................................................................... 2-13

Window Washer Liquid ................................................................................................................................ 2-13

Pecautions for ROPS...................................................................................................................................2-13

Precautions for Attachments........... ... .... .......................................... ... ... ... .... ... ... ... ... .... ... ... .........................2-13

Cab Window Glasses............................................................................. ... .... ............................................... 2-13

Unauthorized Modification............................................................................................................................2-13

Safety at Worksite........................................................................................................................................ 2-14

Working on Loose Ground........................................... ... .... ... ... ... .......................................... ......................2-14

Do Not Go Close to High-Voltage Cables....................................................................................................2-14

Ensure Good Visivility..................................................................................................................................2-15

Ventilation for Enclosed Areas..................................................................................................................... 2-15

Checking Signalman's Signals and Signs.................................................................................................... 2-15

Be Careful About Asbestos Dust..................................................................................................................2-15

Precautions for Operation ................................................................................................................................... 2-16

Before Starting Engine................................................................................................................................. 2-16

Checks Before Starting Engine.............................................................................................................2-16

Precautions When Starting...................... .... ... ... ... ... .... .......................................... ... ... ... .... ..................2-16

Precautions in Cold Areas ....................................................................................................................2-17

Operation .....................................................................................................................................................2-17

Checks Before Operation...................................................................................................................... 2-17

Precautions When Moving Machine Forward or in Reverse........................................................................2-17

Precautions When Traveling........................... ... ... ... .... ... ... ... .... ... ... ... .... ............................................... 2-18

Traveling on Slopes .............................................................................................................................. 2-18

Prohibited Operations ........................................................................................................................... 2-19

Useing Brakes.......................................................................................................................................2-19

Operate Carefully on Snow...................................................................................................................2-19

Parking Machine............................. ... ... ... .... ... ... ... .......................................... ... .... ... .....

Transportation.............................................................................................................................................. 2-20

Shipping................................................................................................................................................2-20

Battery.......................................................................................................................................................... 2-20

Battery Hazard Prevention........................................................................ ... ... ... .... ... ... ... ......................2-20

Starting with Booster Cable .................................................................................................................. 2-21

Towing.......................................................................................................................................................... 2-22

When Towing........................................................................................................................................2-22

Precautions for Maintenance ..............................................................................................................................2-23

Warning Tag................................................................................................................................................. 2-23

Keep Work Place Clean and Tidy................................................................................................................ 2-23

....................... 2-19

2-2

SAFETY SAFETY

Appoint Leader When Working with Others.......................... .... ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... ... ............. 2-23

Stop Engine Before Carrrying Out Inspection and Maintenance ................................................................. 2-24

Two Workers for Maintenance when Engine is Running ............................................................................. 2-24

Proper Tools .. .......................................... .......................................... .......................................................... 2-25

Handling Accumulator.................................................................................................................................. 2-25

Personnel..................................................................................................................................................... 2-25

Attachments................................................................................................................................................. 2-25

Work Under the Machine ............................................................................................................................. 2-26

Noise............................................................................................................................................................ 2-26

Precautions When Using Hammer............................................................................................................... 2-26

Repair Welding ............................................................................................................................................ 2-26

Removing Battery Terminal ...................................................... ... ... ... .... ...................................................... 2-26

Precautions When Using High-Pressure Grease to Adjust Track Tension.. ... ... .......................................... 2-27

Do Not Disassemble Recoil Spring.............................................................................................................. 2-27

Precaution with High-Pressure Oil............................................................................................................... 2-27

Handing High-Pressure Hoses .................................................................................................................... 2-27

Waste Material............................................................................................................................................. 2-28

Maintenance for Air Conditioner .................................................................................................................. 2-28

Compressed Air........................................................................................................................................... 2-28

Periodic Replacement of Safety Critical Parts ............................................................................................. 2-28

2-3

SAFETY LABELS SAFETY

SAFETY LABELS 0.

The following warning signes and safety labels are used on this machine.

Be sure that you fully understand the correct position and content of labels.
To ensure that the content of labels can be read properly, be sure that they are in the correct place and always

keep them clean. When cleaning them, do not use organic solvents or gasoline. These may cause the lab els to
peel off.

There are also other labels in addition to the warning signes and safety labels. Han dle those labels in the same

way.

If the labels are damaged, lost, or cannot be read properly, replace them with new ones. For details of the part

numbers for the labels, see this manual or the actual label, and place an order with Komatsu distributor.

POSITIONS OF SAFETY PICTOGRAMS 0.

2-4

SAFETY SAFETY LABELS



22

SAFETY LABELS 0.

(1) Precautions for operation, inspection and
maintenance (09651-A0641)

Warning!

Read manual before operation, maintaince, disassembly,

assembly and transportation.

(2) Precautions when traveling in reverse
(09802-13000)

Warning
To prevent SEVERE INJURY or DEATH, do the following
before moving machine or its attachments:

Honk horn to alert people nearby.
Be sure no one is on or near the machine.
Use spotter if view is obstructed.

Follow above even if the machine is equipped with back-up
alarm and mirrors.

(3) Precautions for leaving operator's seat
(09654-B0641)

32

To prevent SEVERE INJURY or
DEATH, do the following before
moving machine or its attach­ments
. Honk horn to alert people
nearby.
. Be sure no one is on or near
the machine.
. Use spotter if view is ob-
structed.
Follow above even if the
machine is equipped with
back-up alarm and mirrors.

09802-13000

Sign indicates a hazard of unexpected moving of stopped

machine.

Lower working device to ground, move safety lever to lock

position and take engine key with you before leaving
machine.

2-5

SAFETY LABELS SAFETY

(4) Precautions for high-temperature cooling water
(09653-A0481)

Never remove the cap when the engine is at operating

(High) temperature. Stream or high temperature oil blowing
up from the radiator or hydraulic tank, will cause personal
injury and or burns.

Never remove the radiator or hydraulic tank oil filler when

cooling water or hydraulic oil is at high temperatures.

5. Precautions when adjusting track tension
(09657-A0881)

Safety label is attached on the back side of the inspection
cover of the track frame
Plug coming from track shoe tension adjustment device

causing injury.

Read the operation and maintenance manual and carrying

out the correct method when looseing track tension.

(6) Precautions for handling electric wires
(09808-A0881)

There is the hazard to electric shock when handling electric

wires.

Read the operation and maintenance manual and carrying

out the correct method when handling.

(7) Caution for engine running (09667-A0481)

Sign indicates a hazard of rotating parts, such as belt.
Turn off before inspection and maintenance.

2-6

SAFETY SAFETY LABELS

(8) Precautions for handling accumulator
(09659-A057B)

There is the hazard of explotion causing injury.
Do not disassemble the accumulator, make holes in it, weld

it, cut it, hit it, roll it or bring it near flame.

(9) Caution for approach when machine moving
(09806-B1683)

Sign indicates a hazard of being run over by moving equip-

ment.

Keep a safe distance from equipment when it is moving.

(10) ROPS (09620-B2000)

1

4

ROPS CERTIFICATION
This protective structure complies with the standard provided that us properly equipped on the machine which
mass is less than the specified maximum mass.

1. MODEL 3. FOPS LEVEL No. 5. MAX. MASS kg (Lb)

2. MACHINE MODEL 4. SERIAL NO.

WARNING
If some modification is applied to the ROPS. It might not enough strength and might not be complied with the

standard. Consult Komatsu Distributor before altering.

ROPS may provide less protection if it has been structurally damaged or involved roll-over. Consult Komatsu

Distributor in that case.

Always wear seat belt when moving.

2

5

3

2-7

SAFETY LABELS SAFETY

(11) FOPS (09620-C2000)

1

2

3

4

FOPS CERTIFICATION
This protective structure was provided to comply with the following standard.

1. MODEL 2. MACHINE MODEL

3. SERIAL NO. 4. FOPS LEVEL No.

If some modification is applied to the FOBS. It might not enough strength and might not be complied with the

standard. Consult Komatsu Distributor before altering.

FOBS may provide less protection if it has been structurally damaged or involved roll-over. Consult Komatsu

Distributor in that case.

Always wear seat belt when moving.
(12) Precaution for avoiding falling down (09805-C0881)

Sign indicates a hazard of falling
Do not stand on this place here

(13) Jump start prohibited (09842-A0481)
Start the engine only after sitting down in the operator’s

seat.

Do not attempt to start the engine by short-circuiting the

engine starting circuit. Such an act may cause a serious
bodily injury or fire.

2-8

SAFETY GENERAL PRECAUTIONS

GENERAL PRECAUTIONS 0.

SAFETY RULES 0.

Only trained and authorized personnel can operate and maintain the machine.
Follow all safety rules, precautions and instructions when operating or performing maintenance on the

machine.

If you are under the influence of alcohol or medication, your ability to safely operate or repair your machine may

be severly impaired putting yourself and everyone else on your jobsite in danger.

When working with another operator or with a person on worksite traffic duty, be sure that all personnel under-

stand all hand signals that are to be used.

IF ABNORMALITIES ARE FOUND 0.

If you find any abnormality in the machine during operation or maintenance (noise, vibration, smell, incorrect
gauges, smoke, oil leakage, etc., or any abnormal display on the warning devices or monitor ), rep ort to the pe rson
in charge and have the necessary action taken. Do not operate the machine until the abnormality has been cor­rected.

CLOTHING AND PERSONAL PROTECTIVE ITEMS 0.

Do not wear loose clothing and accessories. There is a hazard that they may catch on control levers or other

protruding parts.

If you have long hair and it hangs out from your hard hat,

there is a hazard that it may get caugh t up in the machin e,
so tie your hair up and be careful not to let it get caught.

Always wear a hard hat and safety shoes. If the nature of

the work requires it, wear safety glasses, mask, gloves, ear
plugs, and safety belt when operating or maintaining the
machine.

Check that all protective equipment functions properly

before using it.

FIRE EXTINGUISHER AND FIRST AID KIT 0.

Always follow the precautions below to prepare for action if any injury or fire should occur.
Be sure that fire extinguishers have been provide d and rea d

the labels to ensure that you know how to use them in
emergencies.

Carry out periodic inspection and maintenance to ensure

that the fire extinguisher can always be used.

Provide a first aid kit at the storage point. Carry out p eriodic

checks and add to the contents if necessary.

SAFETY FEATURES 0.

Be sure that all guards and covers are in their proper position. Have guards and cover s repaired immediately if

they are damaged.

Understand the method of use of safety features and use them properly.
Never remove any safety features. Always keep them in good operating condition.

KEEP MACHINE CLEAN 0.

If water gets into the electrical system, there is a hazard that it will cause malfunctions or misoperation. Do not

use water or steam to wash the electrical system (sensors, connectors).

2-9

GENERAL PRECAUTIONS SAFETY

If inspection and maintenance is carried out when the

machine is still dirty with mud or oil, there is a hazard that
you will slip and fall, or that dirt or mud will get into your
eyes. Always keep the machine clean.

INSIDE OPERATOR'S COMPARTMENT 0.

When entering the operator's compartment, always remove all mud and oil from the soles of your shoes.

If you operate the pedal with mud or oil affixed to your shoes, your foot may slip and this may cause a serious
accident.

Do not leave parts or tools lying around the operator's compartment.
Do not stick suction pads to the window glass. Suction pads act as a lens and may cause fire.
Do not use cellular telephones inside the operator's compartment when driving or operating the machine.
Never bring any dangerous objects such as flammable or explosive items into the operator's compartment.

ALWAYS APPLY LOCK WHEN LEAVING OPERATOR'S SEAT 0.

Before standing up from the operator's seat, lower the work

equipment completely to the ground, set safety lock lever
and parking lever securely to the LOCK position, then stop
the engine.
If you accidentally touch the levers when they are not
locked, there is a hazard that the machine may suddenly
move and cause serious injury or property damage.

Free

Lock

When leaving the machine, always lower the work equip-

ment completely to the ground, set safety lock lever and
Parking lever securely to the LOCK position, then stop the
engine. Use the key to lock all the equipment. Always
remove the key, take it with you, and keep it in the specified
place.

Free

Lock

2-10

SAFETY GENERAL PRECAUTIONS

HANDRAILS AND STEPS 0.

To prevent personal injury caused by slipping or falling off the machine, always do as follows.
Use the parts marked by arrow A in the diagrams when get-

ting on or off the machine.
Never use the parts marked by arrow B when getting on or
off the machine. Use them only when moving along the top
of the track or when checking or carrying out maintenance
inside the side cover, or when filling the tank with oil.

Never jump on or off the machine. In particular, never get on

or off a moving machine. This may cause serious injury.

To ensure safety, always face the machine and maintain

three-point contact (both feet and one hand, or both ha nds
and one foot) with the handrails and steps (inc luding the
track shoe) to ensure that you support yourself.

Do not grip the control levers when getting on or off the

machine.

Never climb on the engine hood or covers where there are

no non-slip pads.

Before getting on or off the machine, check the handrails

and steps (including the track shoe). If there is any oil,
grease, or mud on the handrails or steps (including the track
shoe), wipe it off immediately. Always keep these parts
clean. Repair any damage and tighten any loose bolts.

Do not get on or off the machine while holding tools in your hand.

MOUNTING AND DISMOUNTING 0.

Never jump on or off the machine. Never get on or off a moving machine.
If the machine starts to move when there is no operator on the machine, do not jump on to the machine and try

to stop it.

NO PEOPLE ON ATTACHMENTS 0.

Never let anyone ride on the work equipment, or other att achments. There is a hazard of falling and suffering seri­ous injury.

2-11

GENERAL PRECAUTIONS SAFETY

PREVENTION OF BURNS 0.

Hot coolant

To prevent burns from hot water or steam spurting out when

checking or draining the coolant, wait for the water to cool to
a temperature where it is possible to touch the radiator cap
by hand before starting the operation. Even when the cool­ant has cooled down, loosen the cap slowly to relieve the
pressure inside the radiator before removing the cap.

Hot oil

To prevent burns from hot oil spurting out when checking or

draining the oil, wait for the oil to cool to at temperature
where it is possible to touch the cap or p lug by hand before
starting the operation. Even when the oil has cooled down,
loosen the cap or plug slowly to relieve the internal pres­sure before removing the cap or plug.

FIRE PREVENTION 0.

Fire caused by fuel or oil

Fuel, oil, antifreeze, and window washer liquid are particu­larly flammable and can be hazardous. To prevent fire,
always observe the following:

Do not smoke or use any flame near fuel or oil.
Stop the engine before refueling.
Do not leave the machine while adding fuel or oil.
Tighten all fuel and oil caps securely.
Do not spill fuel on overheated surfaces or on parts of

the electrical system.

Use well-ventilated areas for adding or storing oil and

fuel.

Keep oil and fuel in the determined place and do not

allow unauthorized persons to enter.

After adding fuel or oil, wipe up any spilled fuel or oil.
When carrying out grinding or welding work on the chas-

sis, move any flammable materials to a safe place
before starting.

When washing parts with oil, use a non-flammable oil.

Diesel oil and gasoline may catch fire, so do not use
them.

Put greasy rags and other flammable materials into a

safe container to maintain safety at the work place.

Do not weld or use a cutting torch to cut any pipes or

tubes that contain flammable liquids.

Fire caused by accumulation of flammable material.

Remove any dry leaves, chips, pieces of paper, dust, or any other flammable materials accumulated or affixed
around the engine, exhaust manifold, muffler, or battery, or inside the undercove rs.

Fire coming from electric wiring

Short circuits in the electrical system can cause fire.

Always keep electric wiring connections clean and securely tightened.
Check the wiring every day for looseness or damage. Tighten any loose connectors or wiring clamps.

Repair or replace any damaged wiring.

2-12

SAFETY GENERAL PRECAUTIONS

Fire coming from hydraulic line

Check that all the hose and tube clamps, guards, and cushions are securely fixed in position.
If they are loose, they may vibrate during operation and rub against other parts. This may lead to damage to the
hoses, and cause high-pressure oil to spurt out, leading to fire damage or serious injury.

Explosion caused by lighting equipment

When checking fuel, oil, battery electrolyte, window washer fluid, or coolant, always use lighting with anti-

explosion specifications. If such lighting equipment is not used, there is danger of explosion that may cause
serious injury.

When taking the electrical power for the lighting from the machine itself, follow the instructions in this man-

ual.

ACTION IF FIRE OCCURS 0.

If a fire occurs, escape from the machine as follows.

Turn the start switch OFF to stop the engine.
Use the handrails and steps to get off the machine.

WINDOW WASHER LIQUID 0.

Use an ethyl alcohol base washer liquid.
Methyl alcohol base washer liquid may irritate your eyes, so do not use it.

PRECAUTIONS WHEN USING ROPS (Roll Over Protective Structure) 0.

Install ROPS when carrying out operations in places where
there is danger of the machine rolling over or where there is
danger of falling rocks, such as in mines and quarries.
If ROPS is installed, do not remove it when operating the

machine.

ROPS is installed to protect the operator when machine

rolls over. When machine rolls over, ROPS supports its
weight and absorbs its impact energy.

If ROPS is modified, its strength may lower. When modify-

ing it, consult your Komatsu distributor.

If ROPS is deformed by falling objects or by rolling over, its strength lowers and its design functions cannot be

maintained. In this case, be sure to ask your Komatsu distributor about repair method.
Even when the ROPS is installed, if you do not fasten your seat belt securely, it cannot protect you properly.
Always fasten your seat belt when operating the machine.

PRECAUTIONS FOR ATTACHMENTS 0.

When installing optional parts or attachments, there may be problems with safety or legal restrictions. There-

fore contact your Komatsu distributor for advice.
Any injuries, accidents, or product failures resulting from the use of unauthorized attachments or parts will not

be the responsibility of Komatsu.
When installing and using optional attachments, read the instruction manual for the attachment, and the gen-

eral information related to attachments in this manual.

CAB WINDOW GLASSES 0.

If the cab glass on the work equip ment side is br oken, t here is a hazard that the work equipment may contact the
operator's body directly. Stop operation immediately and replace the glass.

UNAUTHORIZED MODIFICATION 0.

Any modification made without authorization from Komatsu can create hazards. Before making a modification,
consult your Komatsu distributor.
Komatsu will not be responsible for any injuries, accidents, product failures or other property damages resulting

from modifications made without authoriza tion fro m Kom atsu.

2-13

GENERAL PRECAUTIONS SAFETY

SAFETY AT WORKSITE 0.

Before starting operations, thoroughly check the area for any unusual conditions that could be dangerous.
When carrying out operations near combustible material s su ch as thatch ed roofs, dry leaves or dry grass, there

is a hazard of fire, so be careful when operating.

Check the terrain and condition of the ground at the worksite, and determine the safest method of operation.

Do not carry out operations at places where there is a hazard of landslides or falling rocks.

If water lines, gas lines, or high-voltage electrical lines may

be buried under the worksite, contact each utility and iden­tify their locations. Be careful not to sever or damage any of
these lines.

Take necessary m e as ur es to prevent any unauthorized pe r -

son from entering the operating area.

In particular, if you need to operate on a road, protect

pedestrian and cars by designating a person for worksite
traffic duty or by installing fences around the worksite.

When traveling or operating in shallow water or on soft

ground, check the shape and condition of the bedrock, and
the depth and speed of flow of the water before starting
operations.

WORKING ON LOOSE GROUND 0.

Avoid traveling or operating your machine too close to the edge of cliffs, overhangs, and deep ditches. The

ground may be weak in such areas. If the ground should collapse under the weight or vibration of the machine,
there is a hazard that the machine may fall or tip over. Remember that the soil after heavy rain or blasting or
after earthquakes is weak in these areas.

When working on embankments or near excavated ditches, there is a hazard that the weight and vibration of

the machine will cause the soil to collapse. Before starting operations, take steps to ensure that the ground is
safe and to prevent the machine from rolling over or falling.

DO NOT GO CLOSE TO HIGH-VOLTAGE CABLES 0.

Do not travel or operate the machine near electric cables. There is a hazard of electric shock, which may cause
serious injury or property damage. On jobsites where the machine may go close to electric cables, always do as
follows.
Before starting work near electric cables, inform the local power company of the work to be performed, an d ask

them to take the necessary action.

Even going close to high-voltage cables can cause electric

shock, which may cause serious burns or even de ath.
Always maintain a safe distance (see the table on the right)
between the machine and the electric cable. Check with the
local power company about safe operating procedure
before starting operations.

To prepare for any possible emergencies, wear rubber

shoes and gloves. Lay a rubber sheet on top of the seat,
and be careful not to touch the chassis with any exposed
part of your body.

Use a signalman to give warning if the machine approaches

too close to the electric cables.

When carrying out operations near high voltage cables, do

not let anyone come close to the machine.

If the machine should come too close or touch the electric

cable, to prevent electric shock, the operator should not
leave the operator's compartment until it has been con­firmed that the electricity has been shut off.
Also, do not let anyone come close to the machine.

Voltage of Cables Safety Distance

100 V - 200 V Over 2 m

6,600 V Over 2 m
22,000 V Over 3 m
66,000 V Over 4 m

154,000 V Over 5 m
187,000 V Over 6 m
275,000 V Over 7 m
500,000 V Over 11 m

2-14

SAFETY GENERAL PRECAUTIONS

ENSURE GOOD VISIBILITY 0.

Check for any persons or obstacles in the area around the machine and check the conditions of the jobsite to

ensure that operations and travel can be carried out safely. Always do as follows.

Position a signalman if there are areas at the rear of the machine where the visibility is not good.
When working in dark places, turn on the working lamp and front lamps installed to the machine, and set up

additional lighting in the work area if necessary.

Stop operations if the visibility is poor, such as in mist, snow, rain, or dust.

VENTILATION FOR ENCLOSED AREAS 0.

Exhaust fumes from the engine can kill.
If it is necessary to start the engine within an enclosed area,

or when handling fuel, flushing oil, or paint, open the doors
and windows to ensure that adequate ventilation is provided
to prevent gas poisoning.

CHECKING SIGNALMAN'S SIGNALS AND SIGNS 0.

Set up signs to inform of road shoulders and soft ground. If the visibility is not good, position a signalman if

necessary. Operators should pay careful attention to the signs and follow the instructions from the signalman.

Only one signalman should give signals.
Make sure that all workers understand the meaning of all signals and signs before starting work.

BE CAREFUL ABOUT ASBESTOS DUST 0.

Asbestos dust in the air can cause lung cancer if it is inhaled.
There is danger of inhaling asbestos when working on jobsites
handling demolition work or work handling industrial waste.
Always observe the following.
Spray water to keep down the dust when cleaning. Do not

use compressed air for cleaning.

If there is danger that there may be asbestos dust in the air,

always operate the machine from an upwind position. All
workers should use an approved respirator.

Do not allow other persons to approach during the opera-

tion.

Always observe the rules and regulations for the work site

and environmental standards.
This machine does not use asbestos, but there is a danger that
imitation parts may contain asbestos , so always use genuine
Komatsu parts.

2-15

PRECAUTIONS FOR OPERATION SAFETY

PRECAUTIONS FOR OPERATION 0.

BEFORE STARTING ENGINE 0.

If there is a warning tag hanging from the work equipment con­trol lever, do not start the engine or touch the levers .

CHECKS BEFORE STARTING ENGINE 0.

Carry out the following checks before starting the engine at the beginning of the day's work.
Completely remove all flammable materials accumulated around the engine and battery, and remove any dirt

from the windows, mirrors, handrails and steps.

Remove all dirt from the surface of the lens of the front lamps and working lamps, and check that they light up

correctly.

Check the coolant level, fuel level, and oil level in engine oil pan, check for clogging of the air cleaner, and

check for damage to the electric wiring.

Adjust the operator's seat to a position where it is easy to carry out operations, and check that there is no dam-

age or wear to the seat belt or mounting clamps.

Check that the gauges work properly, check the angle of the lights and working lamps, and check that the con-

trol levers are all at the neutral position.

When starting the engine, check that the parking lever and safety lock lever are at the LOCK position.
Adjust the mirrors so that you can get a good rear-view from the operator's seat.

For the details of adjustment, see “ADJUST MIRROR ( 3-66 )“.

Check that there are no persons or obstacles above, below, or in the area around the machine.

PRECAUTIONS WHEN STARTING 0.

Start and operate the machine only while seated.
Do not attempt to start the engine by short-circuiting the

engine starting circuit. Such an act may cause a serious
bodily injury or fire.

When starting the engine, sound the horn as a warning.
Do not allow anyone apart from the operator to ride on the

machine.

2-16

SAFETY PRECAUTIONS FOR OPERATION

PRECAUTIONS IN COLD AREAS 0.

Carry out the warming-up operation thoroughly. If the machine is not thoroughly warmed up before the control

levers are operated, the reaction of the machine will be slow, and this may lead to unexpected accidents.
If the battery electrolyte is frozen, do not charge the battery or start the engine with a different power source.

There is a hazard that this will ignite the battery and cause the battery to explode.

Before charging or starting the engine with a different power source, melt the battery electrolyte and check that

there is no leakage of electrolyte before starting.

OPERATION 0.

CHECKS BEFORE OPERATION 0.

When carrying out the checks, move the machine to a wide area where there are no obstructions, and operate
slowly. Do not allow anyone near the machine.

Always fasten your seat belt.
Check the operation of travel, steering and brake systems,

and work equipment control system.
Check for any abnormality in the sound of the machine,

vibration, heat, smell, or gauges; check also that there is no

leakage of oil or fuel.
If any abnormality is found, carry out repairs immediately.

PRECAUTIONS FOR MOVING MACHINE FORWARD OR IN REVERSE 0.

Before travelling, check again that there is no one in the sur-

rounding area, and that there are no obstacles.

Before travelling, sound the horn to warn people in the area.
Always operate the machine only when seated.
Do not allow anyone apart from the operator to ride on the

machine.
Check that the back-up alarm (alarm buzzer when machine

travels in reverse) works properly.
Always lock the door and windows of the operator's com-

partment in position (open or closed).

On jobsites where there is a hazard of flying ob jects or of

objects entering the operator's compartment, check that the

door and windows are securely closed.
If there is an area to the rear of the machine where the visi-

bility is obstructed, use a flagman. Be extremely careful not

to hit anything and drive the machine slowly.
Always be sure to carry out the above precautions even when the machine is equipped with mirrors.

2-17

PRECAUTIONS FOR OPERATION SAFETY

PRECAUTIONS WHEN TRAVELING 0.

Never turn the starting switch to the OFF position when traveling. It is dangerous if the engine stops when the

machine is traveling. When the engine is off, it is impossible to operate the steering. Apply the brakes and stop
the machine immediately, if the engine stops.

When traveling on flat ground, keep the work equipment 40 to 50 cm high above the ground.
When traveling on rough ground, travel at low speed and do

not operate the steering suddenly. There is danger that the
machine may turn over. The work equipment may hit the
ground surface and cause the machin e to lose its balance,
or may damage the machine or structures in the area.

Avoid traveling over obstacles when possible. If the

machine has to travel over an obstacle, keep the work
equipment close to the ground and travel at low speed.
Never travel over obstacles which make the machine tilt
strongly to one side.

When traveling or carrying out operations, always keep a

safe distance from people, structures, or other machines to
avoid coming into contact with them.

When passing over bridges or structures, check first that the

structure is strong enough to support the weight of the
machine. When traveling on public roads, check first with
the relevant authorities and follow their instructions.

When operating in tunnels, under bridges, under electric wires, or other places where the height is limited,

operate slowly and be extremely careful not to let the work equipment hit anything.

Do not approach the edge of a cliff carelessly. When dropping soil over a cliff for banking or reclamation, leave

soil of one scoop at the edge of the cliff and push it with the next scoop.

When the machine passes over the top of a hill or when a load is dumped over a cliff, the load is suddenly

reduced, and there is danger that the travel speed rises suddenly. To prevent this, lower the travel speed.

If the machine moves with only either side of the blade loaded, its tail may swing. Take care.

TRAVELING ON SLOPES 0.

To prevent the machine from tipping over or slipping to the side, always do as follows.
When traveling on slops, keep the blade approxmately 20 to

30 cm above the ground. In case of emergency, quickly
lower the blade to the ground to help the machine to stop.
Apply the brake and use the engine as a brake, if neces­sary.

Always travel straight up or dow n a slope. Traveling at an

angle or across the slope is extremely dangerous.

Do not turn on slopes or travel across slopes. Always go

down to a flat place to change the position of the machine,
then travel on to the slope again.

Travel on grass, fallen leaves, or wet steel plates with low

speed. Even with slight slopes there is a hazard that the
machine may slip.

When driving down a slope, never shift gear or place the transmission in neutral. The engine brake cannot be

used and this creates a dangerous condition. Always travel downhill in the same speed range as when travel­ing uphill.

When turning on a downhill ground, lower the travel speed.

2-18

SAFETY PRECAUTIONS FOR OPERATION

PROHIBITED OPERATIONS 0.

To make it easier to escape if there is any problem, set the tracks at right angles to the road shoulder or cliff

with the sprocket at the rear when carrying out operations.
When operating the machine, take care that it will not exceed its performance values such as stability, maxi-

mum using load, etc. to prevent rolling of the machine caused by an overload and disasters caused by break-

age of the work equipment.

USING BRAKES 0.

When the machine is traveling, do not rest your foot on the brake pedal. If you travel with your foot resting on

the pedal, the brake will always be applied, and this will cause the brakes to overheat and fail.
Do not depress the brake pedal repeatedly if not necessary. If this is neglected, the brake will be overheated

and will not work when required.
When traveling downhill, use the braking force of the engine.

OPERATE CAREFULLY ON SNOW 0.

Snow-covered or frozen surfaces are slippery, so be extremely careful when traveling or operating the

machine, and do not operate the levers suddenly. Even a slight slope may cause the machine to slip, so be par-

ticularly careful when working on slopes.
With frozen ground surfaces, the ground becomes soft when the temperature rises, and this may cause the

machine to tip over .
If the machine enters deep snow, there is a hazard that it may tip over or become buried in the snow. Be careful

not to leave the road shoulder or to get trapped in a snow dr ift.
When clearing snow, the road shoulder and objects placed beside the road are buried in the snow and cannot

be seen. There is a hazard of the machine tipping ove r or hitting covered objects, so always car ry out opera-

tions carefully.
When traveling on snow-covered slopes, never apply the brakes suddenly. Reduce the speed and use the

engine as a brake while appling the foot brake intermittently (depress the brake intermittently several times). If

necessary, lower the blade to the ground to stop the machine.

PARKING MACHINE 0.

Park the machine on level ground where there is no danger

of falling rocks or landslides, or of flooding if the land is low,

and lower the work equipment to the ground.
If it is necessary to park the machine on a slope, set the

blocks under the tracks to prevent the machine from mov-

ing, then dig the work equipment into the grou nd .

Thrust the edge

Lock

When leaving the machine, set the safety lock lever and

parking lever to the LOCK position, stop the engine, and

use the key to lock all the equipment. Always remove the

key and take it with you.
Work equipment posture: See “PARKING MACHINE ( 3-89 )“.

Locks: See “LOCKING ( 3-91 )“
Always close the door of the operator's compartment.

Block

Thrust the edge

Free

Lock

Free

2-19

PRECAUTIONS FOR OPERATION SAFETY

TRANSPORTATION 0.

The machine can be divided into parts for transpo rtation, so when transportating the machine, please contact your
Komatsu distributor to have the work carried out.

SHIPPING 0.

When shipping the machine on a trailer, do as follows.
The weight, transportation height, and overall length of the machine differ according to the work equipment, so

be sure to confirm the dimensions.

When passing over bridges or structures on private land, check first that the structure is strong enough to sup-

port the weight of the machine. When traveling on public roads, check first with the relevant authorities and fol­low their instructions.

For details of the shipping procedure, see “TRANSPORTATION ( 3-100 )“ in the OPERATION section.

BATTERY 0.

BATTERY HAZARD PREVENTION 0.

Battery electrolyte contains sulphuric acid, and batteries generate flammable hydrogen gas, which may explode.
Mistaken handling can lead to serious injury or fire. For this reason, always observe the following precautions.
When the battery electrolyte is below LOWER LEVEL, don't either use or charge the battery. Otherwise, that

may cause explosion. Always carry out periodic checks of the battery electrolyte, and add distilled water up to
UPPER LEVEL.
For the method of checking the battery electrolyte, see CHECK LEVEL OF BATTER Y ELECTROLYTE ( 4-41 ).

When working with batteries, always wear safety glasses and rubber gloves.
Never smoke or use any flame near the battery.

If you spill acid on your clothes or skin, immediately flush

the area with large amount of water.

If acid gets into your eyes, flush them immediately with

large amount of water and seek medical attent ion .

Before working with batteries, turn the starting switch to the OFF position.
As there is a hazard that sparks will be generated, always do as follows.

Do not let tools or other metal objects make any contact between the battery terminals. Do not leave tools or

other metal objects lying around near the battery.

Always disconnect the negative (-) terminal (ground side) first when removing the battery; when installing the

battery, connect the positive (+) terminal first, and connect the ground last. Tighten the battery terminals
securely.

Tighten the battery terminals securely.
Flammable hydrogen gas is genera ted when the battery is charged, so remove the battery from the chassis,

take it to a well-ventilated place, and remove the battery caps before charging it.

Tighten the battery caps securely.
Install the battery securely to the determined place.

2-20

SAFETY PRECAUTIONS FOR OPERATION

STARTING WITH BOOSTER CABLE 0.

If any mistake is made in the method of connecting the booster
cables, it may cause the battery to explode, so always do as
follows.
When starting with a booster cable, carry out the starting

operation with two workers (one worker sitting in the opera-

tor's seat and the other working with the battery).
When starting from another machine, do not allow the two

machines to touch.
When connecting the booster cables, turn the starting

switch OFF for both the normal machine and p roblem

machine. There is a hazard that the machine will move

when the power is connected.
Be sure to connect the positive (+) cable first when installing

the booster cables. Disconnect the negative (-) cable

(ground side) first when removing them.
When removing the booster cables, be careful not to let the

booster cable clips touch each other or to let the clips touch

the machine.
Always wear safety goggles and rubber gloves when start-

ing the engine with booster cables.
When connecting a normal machine to a problem machine

with booster cables, always use a normal machine with the

same battery voltage as the problem machine.
For the procedure of starting the engine with booster

cables, see STARTING ENGINE WITH BOOSTER CABLE

( 3-109 ).

2-21

PRECAUTIONS FOR OPERATION SAFETY

TOWING 0.

WHEN TOWING 0.

Injury or death could result if a disabled machine is towed
incorrectly. Always observe the following rules.
Never use a towing method different from the one descr ibed

in this manual.
For the method of towing, see METHOD OF TOWING
MACHINE ( 3-108 ).

When handling a wire rope, always wear leather gloves.
When working with others to prepare for towing, signals

should be agreed upon beforehand.

If your machine is towed by another machine, stop the

engine and release the brake. Please cont act your Komat s u
distributor to have the brake released.

If this machine cannot travel under its own power, release

the brakes, then tow the machine with another machine.
Please contact your Komatsu distributor to have the brakes
released.

Towing on slopes is dangerous. When doing so, choose a

gentle slope. If no gentle slope is available, make such a
slope by earth-removal work.

When connecting up a towing machine, do not let anyone

enter the area between the towing machine and the equip­ment being towed.

Do not straddle the towing cable or wire rope.
When your machine is towed by another machine, ALWAYS

use a wire rope with a sufficient towing capacity.

Set the towing machine and the towing connection of the

equipment being towed in a straight line when connecting it.

Take up the slack in the wire rope and tow the machine.
When lifting the machine up, use the towing hook.
If the machine is stuck in sandy soil, dig out the soil around

the towing hook, then use the towing hook to pull the
machine out.
Permissible load for towing hook: 21,800 kg (213,780 N).

Do not use a broken (A), kinked (B) or frayed (C) wire rope.

2-22

SAFETY PRECAUTIONS FOR MAINTENANCE

PRECAUTIONS FOR MAINTENANCE 0.

WARNING TAG 0.

When carrying out inspection or maintenance, ALWAYS

attach the “DO NOT OPERATE“ warning tag to the blade

control lever in the operator's cab to alert others that you

are working on the machine. Attach additional warning tags

around the machine in necessary.

Warning tag Part No. 09963-A1640

This tag is placed in the same case as is this operation and

maintenace manual.
If others start the engine, or touch or operate the work

equipment control lever while you are performing service or

maintenance, you could suffer serious injury or property

damage.

KEEP WORK PLACE CLEAN AND TIDY 0.

Do not leave hammers or other t ools lying around in the work place. Wipe up all grease, oil, or other sub-

stances that will cause you to slip. Always keep the work place clean and tidy to enable you to carry out opera-

tions safely.

If the work place is not kept clean and tidy, there is the danger that you will trip, slip, or fall over and injure your-

self.

APPOINT LEADER WHEN WORKING WITH OTHERS 0.

When repairing the machine or when removing and installing the work equipment, appoint a leader and follow

his instructions during the operation.

2-23

PRECAUTIONS FOR MAINTENANCE SAFETY

STOP ENGINE BEFORE CARRYING OUT INSPECTION AND MAINTENANCE 0.

Stop the machine on firm, level ground.
Select a place where there is no hazard of falling rocks or

landslides, or of flooding if the land is low.

Lower the work equipment completely to the ground and

stop the engine.

After stopping the engine, operate the work equipment con-

trol lever to the RAISE and LOWER positions 2 or 3 times to
release the pressure remaining in the hydraulic circuit, then
set the safety lock lever and Parking lever to LOCK position.

Free

Lock

Free

Put blocks under the track to prevent the machine from

moving.

Block

Lock

TWO WORKERS FOR MAINTENANCE WHEN ENGINE IS RUNNING 0.

To prevent injury, do not carry out maintenance with the engine
running. If maintenance must be carried out with the engine
running, carry out the operation with at least two workers and
do as follows.
One worker must always sit in the operator's seat and be

ready to stop the engine at any time. All workers must
maintain contact with the other workers.

Place the parking lever and safety lock lever at the LOCK

position to prevent the work equipment from moving.

When carrying out operations near the fan, fan belt, or other

rotating parts, there is a hazard of being caught in the parts,
so be careful not to come close.

Do not touch any control levers. If any control lever must be

operated, give a signal to the other workers to warn them to
move to a safe place.

Never drop or insert tools or other objects into the fan or fan

belt. Parts may break or be sent flying.

Free

2-24

Lock

Free

Lock

SAFETY PRECAUTIONS FOR MAINTENANCE

PROPER TOOLS 0.

Use only tools suited to the task and be sure to use the to ols
correctly . Using damaged, low quality, faulty, makeshift tools or
improper use of the tools could cause serious personal injury.

HANDLING ACCUMULATOR 0.

On machines equipped with an accumulator, for a short time after the engine is stopped, if the blade control

lever is moved to the LOWER position, the work equipment will move down under its own weight.

After stopping the engine, always place the safety lock lever and Parking lever in the LOCK position.
When releasing the pressure inside the work equipment circuit on machines equipped with an accumulator, fol-

low the procedure given in the following section.

Method of releasing pressure : See “ACCUMULATOR, HANDLING ( 3-54 )“.
The accumulator is charged with high-pressure nitrogen gas.
When handling the accumulator, careless procedure may
cause an explosion which could lead to serious injury or prop­erty damage. For this reason, always observe the following
precautions.

Do not disassemble the accumulator.
Do not bring it near flame or dispose of it in fire.
Do not make holes in it, weld it, or use a cutting torch.
Do not hit or roll the accumulator, or su bject it to any imp act.
When disposing of the accumulator, the gas must be

released. Please contact your Komatsu distributor to have

this work performed.

PERSONNAL 0.

Only authorized personnel can service and repair the machine. Do not allow unauthorized personnel into the
area. If necessary, employ an observer.

ATTACHMENTS 0.

Appoint a leader before starting re moval or inst allatio n oper-

ations for attachments.
Place attachments that have been removed from the

machine in a stable condition so that they do not fall. And

take steps to prevent unauthorized persons from entering

the storage area.

2-25

PRECAUTIONS FOR MAINTENANCE SAFETY

WORK UNDER THE MACHINE 0.

If it is necessary to go under the work equipment or the

machine to carry out service and maintenance, support the
work equipment and machine securely with blocks and
stands strong enough to support the weight of the work
equipment and machine.

It is extremely dangerous to work under the machine if the

track shoes are lifted off the gr ound and the machine is sup­ported only with the work equipment. If any of the control
levers is touched by accident, or there is damage occurring
to the hydraulic piping, the work equipment or the machine
will suddenly drop. This is extremely dangerous. Never
work under the work equipment or the machine.

NOISE 0.

When carrying out maintenance of the engine and you are expo sed to noise for long peri ods of time, wear ear cov­ers or ear plugs while working.
If the noise from the machine is too loud, it may cause temporary or permanent hearing problems.

PRECAUTIONS WHEN USING HAMMER 0.

When using a hammer, pins may fly out or metal particles may
be scattered. This may lead to serious injury. Always do as
follows.
If hard metal parts such as pins, bucket te eth, cutting edges,

or bearings are hit with a hammer, there is a hazard that
pieces might be scattered and cause injury. Always wear
safety goggles and gloves.

When hitting pins or bucket teeth, there is a hazard that bro-

ken pieces might be sent flying and injure people in the sur­rounding area. Always check that there is no one in the
surrounding area.

There is a hazard that the pin hit with strong force m ay fly ou t an d inju re peop le in th e s urro u nd ing are a .

REPAIR WELDING 0.

Welding operations must always be carried out by a qualified welder and in a place equipped with proper equip­ment. There is a hazard of gas, fire, or el ectrocution when carrying out welding, so never allow any unqualified
personnel to carry out welding.

REMOVING BATTERY TERMINAL 0.

When repairing the electrical system or when carrying out electrical welding, remove the negative (-) terminal of
the battery to prevent the flow of current.

2-26

SAFETY PRECAUTIONS FOR MAINTENANCE

PRECAUTIONS WHEN USING HIGH-PRESSURE GREASE TO ADJUST TRACK TENSION 0.

Grease is pumped into the track tension adjustment system

under high pressure. If the specified procedure for mainte-

nance is not followed when making adjustment, grease

drain valve (1) may fly out and cause serious injury or dam-

age.
When loosening grease drain valve (1) to loosen track ten-

sion, never loosen it more than one turn. In doing so, loosen

the valve slowly.
Never put your face, hands, feet, or any other part of your

body directly in front of grease drain valve (1).

DO NOT DISASSEMBLE RECOIL SPRING 0.

Never attempt to disassemble the recoils spring assembly. It contains a spring under high pressure which serves
as a shock absorber for the idler. If it is disassembled by mistake, the spring will fly out and cause serious injury.
When it becomes necessary to disassemble it, ask your Komatsu distributor to do the work.

PRECAUTION WITH HIGH-PRESSURE OIL 0.

The hydraulic system is always under internal pressure. When inspecting or replacing piping or hoses, always
check that the pressure in the hydraulic circuit has been released. If the circuit is still under pressure, it will lead to
serious injury, so always do as follows.

Do not carry out inspection or replacement work when the hydraulic system is under pressure.
If there is any leakage from the piping or hoses, the surrounding area will be wet, so check for cracks in the pip-

ing and hoses and for swelling in the hoses.

When carry out inspection, wear safety glasses and leather gloves.
There is a hazard that high-pressure oil leaking from small

holes may penetrate your skin or cause blindness if it con-

tacts your eyes directly. If you are hit by a jet of high-pres-

sure oil and suffer injury to your skin or eyes, wash the

place with clean water, and consult a doctor immediately for

medical attention.

PRECAUTION FOR HIGH FUEL PRESSURE 0.

When the engine is running, high-pressure is generated in the en gin e fuel pip ing. Whe n carrying ou t inspection or
maintenance of the fuel piping system, stop the engine and wait for at least 30 seconds to allow the internal pres­sure to go down before starting the operation.

HANDLING HIGH-PRESSURE HOSES 0.

If oil or fuel leaks from high-pressure hoses, it may cause fire or defective operation, which may lead to serious

injury. If any loose bolts are found, stop work and tighten to the specified torque. If any damaged hoses are

found, stop operations immediately and contact your Komatsu distributor.
Replace the hose if any of the following problems are found.

2-27

PRECAUTIONS FOR MAINTENANCE SAFETY

Damaged or leaking hydraulic fitting.
Frayed or cut covering or exposed reinforcement wire layer.
Covering swollen in places.
Twisted or crushed movable portion.
Foreign material embedded in covering.

PRECAUTION FOR HIGH VOLTAGE 0.

When the engine is running and immediately after it is stopped, high voltage is generated inside the engine

controller and the engine injector, and there is danger of electrocution. Never touch the inside of the controller
or the engine injector portion.
If it is necessary to touch the inside of the controller or the engine injector portion, please contact your Komatsu
distributor.

WASTE MATERIAL 0.

To prevent pollution, pay careful attention to the method of disposing of waste materials.
Always put oil drained from your machine in containers.

Never drain oil directly onto the ground or dump into the
sewage system, rivers, the sea, or lakes.

Obey appropriate laws and regulations when disposing of

harmful objects such as oil, fuel, coolant, solvent, filters, and
batteries.

MAINTENANCE FOR AIR CONDITIONER 0.

If air conditioner refrigerant gets into your eyes, it may cause blindness; if it touches your skin, it may cause frost­bite.
Never touch refrigerant.

COMPRESSED AIR 0.

When carrying out cleaning with compressed air, there is a hazard of serious injury caused by flying particles.
When using compressed air to clean elements or the radiator, always wear safety goggles, dust mask, gloves,

and other protective equipment.

PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS 0.

To enable the machine to be used safely for long periods, always periodically add oil and carry out inspection

and maintenance. However, to further increase safety, perio dically repl ace the seat b elt, hoses, and other p art s
which have a close relationship to safety.
See Replacing critical parts: PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS ( 4-14 )

The material of these components naturally ch anges over time, and repeated use causes deterioration, wear,

and fatigue. As a result, there is a hazard that these comp onents may fail and cause serious injury or death. It
is difficult to judge the remaining life of these components from external inspection or the feeling when operat­ing, so always replace them at the specified interval.

Replace or repair safety-critical parts if any defect is found, even when they have not reached the time speci-

fied interval.

2-28

OPERATION

43

WARNING

Please read and make sure that you understand the safety
volume before reading this section.

GENERAL VIEW OPERATION

GENERAL VIEW 0.

GENERAL VIEW OF MACHINE 0.

(1) Blade (6) Sprocket
(2) Blade lift cylinder (7) Track frame
(3) Cab (8) Frame
(4) ROPS (9) Track shoe
(5) Ripper

3-2

OPERATION GENERAL VIEW

GENERAL VIEW OF CONTROLS AND GAUGES 0.

(1) Parking lever (12) Fan selector switch
(2) Safety lock lever (13) Starting switch
(3) Cigarette lighter (14) Information switch
(4) Fuel control dial (15) Buzzer cancel switch
(5) Joystick (Steering, directional and gear shift lever) (16) Brake pedal
(6) Auto shift down switch (17) Deceleration pedal
(7) Preset mode switch (18) Blade control lever
(8) Head lamp switch (19) Horn switch
(9) Air conditioner panel or heater panel (20) Ripper control lever
(10) Display panel A (Speed range, Engine speed) (21) Wiper switch
(11) Rear lamp switch (22) Room lamp switch

3-3

GENERAL VIEW OPERATION

FRONT PANEL

(1) Engine cooling water temperature gauge (10) Hydraulic oil temperature caution lamp
(2) Power train oil temperature gauge (11) Engine preheating pilot lamp
(3) Hydraulic oil temperature gauge (12) Maintenance caution lamp
(4) Fuel gauge (13) Warning lamp
(5) Radiator coolant level caution lamp (14) Filter, oil change interval lamp
(6) Charge caution lamp (15) Display panel A (Speed range, Engine speed)
(7) Engine oil pressure caution lamp (16) Display panel B (Multi-information)
(8) Engine cooling water temperature caut ion lamp (17) Fan reverse rotation lamp
(9) Power train oil temperature caution lamp

3-4

OPERATION EXPLANATION OF COMPONENTS

EXPLANATION OF COMPONENTS 0.

The following is an explanation of the devices needed for operating the machine.
To carry out suitable operations correctly and safely, it is important to understand fully the methods of oper ating the
equipment and the meanings of the displays.

FRONT PANEL 0.

A: Check monitor group D: Meter gr ou p
B: Caution monitor group E: Switch
C: Emergency caution group F: Lamp

A: Basic check items (see CHECK MONITOR GROUP ( 3-7 ))
Before the engine is started, the basic items among the check before starting items that must be checked are dis ­played.
If there is any abnormality, the caution lamp for the location of the abnormality flashes.

NOTICE
When carrying out the check before starting, do not rely only on these monitors. Always carry out the
inspection items according to the Maintenance section or Section OPERATION ( 3-55 ).

B: CAUTION MONITOR GROUP (see “CAUTION MONIT OR GROUP ( 3-8 )“)

CAUTION

If these caution lamp flash, check and repair the appropriate location as soon as possible.

These are items, which need to be observed while the engine is running. If any abnormality occurs, items, which
need to be repaired as soon as possible, are displayed.
If there is any abnormality, the appropriate monitor lamp will flash to indicate the location of the abnormality.

3-5

EXPLANATION OF COMPONENTS OPERATION

C: EMERGENCY CAUTION ITEMS (See “EMERGENCY CAUTION ITEMS ( 3-10 )“)

CAUTION

If the caution lamp for any of these i tems f lashes, s top the engine immediately or run it at low idling, and
take the following action.

This displays those of the abnormality items for which action must be taken immediately when the engine is run­ning.
If there is any abnormality, the monitor showing the location of the abnormality will flash and the alarm buzzer will
sound.

D: Meter display portion (see “METER GROUP ( 3-12 )“)
This consists of the preheating pilot lamp, power train oil temperature gauge, engine water temperature gauge,
hydraulic oil temperature gauge. fuel gauge, dual/single selector display lamp, display panel A (speed range dis­play, engine speed) and display panel B (multi-information).

E: Switches (for details, see “SWITCH ( 3-28 )“.)
These consist of the starting switch, buzzer cancel switch, front lamp switch, rear lamp switch, auto shift down
switch, Preset mode switch, information switch, and Fan selector switch.

F: Lamps (for details, see “LAMP ( 3-19 )“.)
These consist of the warning lamp and filter, oil change interval lamp and Fan reverse rotation lamp.

3-6

OPERATION EXPLANATION OF COMPONENTS

CHECK MONITOR GROUP 0.

NOTICE
When carrying out checks before starting, do not simply rely on the monitor. Always refer to OPERA-

TION ( 3-55 ) to carry out the checks.

Park the machine on level ground and then check the monitor lamps.
Confirm that the monitor lamp lights up for about 2 seconds after the starting switch is turned to ON. If

any lamp does not light up, please contact your Komatsu distributor to inspect it.

REMARK
When the starting switch is turned ON before starting the engine, the caution lamp flash for 2 seconds,

the warning lamp lights up for 2 seconds, and the alarm buzzer sounds for 2 second.
The caution lamps cannot be checked for breakage until at least 5 seconds after the engine has been

stopped.

This displays the basic items among the check befo re starting items that must be checked before starting the
engine. If there is any abnormality, the caution lamp for the location of the abnormality will flash.

A (1) Radiator coolant level monitor

RADIATOR COOLANT LEVEL MONITOR 0.

This lamp (1) warns the operator that the level of the cooling
water in the radiator has gone down.
If the lamp flashes, check the level of the cooling water in the
main radiator, and add water.

3-7

EXPLANATION OF COMPONENTS OPERATION

CAUTION MONITOR GROUP 0.

CAUTION

If these caution lamps item flash, check and repair the appropriate location as soon as possible.

NOTICE

Park the machine on level ground and check the monitor lamps.
Confirm that these monitor lamps light for about 2 seconds after the starting switch is turned to ON. If

any monitor lamp does not light, ask your Komatsu distributor to inspect it.

These are items, which need to be observed wh en the e ngine is running. If any abnormality occurs, the item need­ing immediate repair is displayed. If there is any abnormality, the abnormal location on the caution lamp will flash.

B (1) Charge level monitor B (2) Maintenance caution lamp

CHARGE MONITOR 0.

This lamp (1) indicates an abnormality in the charging system
while the engine is running.
If the monitor lamp flashes, check the V-belt tension. If any
abnormality is found, see “OTHER TROUBLE ( 3-112 )“.

REMARK
This monitor lamp lights, when the starting switch is
turned to ON immediately after the engine is started or
immediately before the engine is stopped. It does not indi­cate an abnormality.

3-8

OPERATION EXPLANATION OF COMPONENTS

MAINTENANCE CAUTION LAMP 0.

This monitor (2) flashes when the filter or oil change interval
has been reached. SWITCH DISPLAY PANEL B (Multi-infor­mation) ( 3-14 ) to the maintenance mode and check o r replace
the applicable filter or oil.

3-9

EXPLANATION OF COMPONENTS OPERATION

EMERGENCY CAUTION ITEMS 0.

CAUTION

If the caution lamp for any of these i tems f lashes, s top the engine immediately or run it at low idling, and
take the following action.

NOTICE

Park the machine on level ground and check the monitor lamps.
Confirm that these caution lamps light for about 2 seconds after the starting switch is turned to ON. If

any monitor lamp does not light, ask your Komatsu distributor to inspect it.

These items need to be observed while the engine is running. If any abnormality occurs, items that need to be
repaired immediately are displayed.
If there is any abnormality, alarm buzzer sounds intermittently and the abnormal location on the caution lamp will
flash.

C (1) Engine oil pressure caution lamp C (2) Engine cooling water temperature caution lamp
C (3) Power train oil temperature caution lamp C (4) Hydraulic oil temperature caution lamp

ENGINE OIL PRESSURE CAUTION LAMP 0.

This lamp (1) indicates a low engine oil pressure.
If the monitor lamp flashes, stop the engine and check it imme­diately.

REMARK
The alarm buzzer sounds, when the starting switch is
turned to ON immediately after th e engine oil changed. It
does not indicate an abnormality.

3-10

OPERATION EXPLANATION OF COMPONENTS

ENGINE COOLING WATER TEMPERATURE MONITOR 0.

This lamp (2) indicates a rise in the cooling water temperature.
When the monitor lamp flashes, run the engine at the low idlin g
speed until the green range of the engine wate r temperature
gauge lights.

POWER TRAIN OIL TEMPERATURE MONITOR 0.

This lamp (3) indicates a rise in the oil temperature of the
torque converter outlet.
When the monitor lamp flashes, run the engine at the low idlin g
speed until the green range of the power train oil temperature
gauge lights.

HYDRAULIC OIL TEMPERATURE MONITOR 0.

This lamp (4) indicates a rise in the hydraulic oil temperature.
When the monitor lamp flashes, stop the machine and run the
engine at the low idling speed until oil temperature falls.

3-11

EXPLANATION OF COMPONENTS OPERATION

METER GROUP 0.

NOTICE
While the engine is at rest, turn the starting switch ON to see if engine cooling water temperature gauge,
power train oil temperature gauge, fuel gauge and monitor lamps all light up.
If they do not, ask your Komatsu distributor to inspect it.

D (1) Engine cooling water temperature gauge D (6) Engine preheating pilot lamp
D (2) Power train oil temperature gauge D (7) Display panel A (Speed range display)
D (3) Hydraulic oil temperature gauge D (7) Display panel B (multi-information)
D (4) Fuel gauge

ENGINE COOLING WATER TEMPERATURE GAUGE 0.

This gauge (1) indicates the temperature of the cooling water.
If the temperature is normal during operation, the green range
(B) will light.
If the red range (C) lights up during operation, move the Fuel
control dial to lower the engine speed to approx. 3/4 of the full
speed, and run until the water temperature enters the green
range (B).
During operation, if red range (C) lights up, the engine water
temperature monitor flashes, and the alarm buzzer sounds,
stop the machine, run the engine at low idling, and wait for the
water temperature to go down to green range (B) .
(A): White range
(B): Green range
(C): Red range

NOTICE
If the water temperature gauge often enters the red range (C), check the radiator for clogging.

3-12

OPERATION EXPLANATION OF COMPONENTS

POWER TRAIN OIL TEMPERATURE GAUGE 0.

This gauge (2) indicates the oil temperature of the torque con­verter outlet. If the temperature is normal during operation, the
green range will light.
If the red range (C) lights up during operation, move the fuel
control lever to lower the engine speed to approx. 3/4 o f the full
speed, reduce the load and run until the oil temperature enters
the green range (B).
If the power train oil temperature enters the red range (C) , and
the power train oil temperature caution lamp flashes and the
alarm buzzer sounds, stop the machine and run at low idling
until the oil temperature enters the green range (B) .
(A): White range
(B): Green range
(C): Red range

NOTICE
If the power train oil temperature gauge often enters the
red range (C), we recommend you to lower the travel
speed one range (for example, F2 → F1) to reduce the load
on the power train when operating.

HYDRAULIC OIL TEMPERATURE GAUGE 0.

This gauge (3) indicates the oil temperature of the hydra ulic oil.
If the temperature is normal during operation, the green range
(B) will light.
If the red range (C) lights up during operation, move the fuel
control lever to lower the engine speed to approx. 3/4 o f the full
speed, reduce the load and run until the oil temperature enters
the green range (B).
(A): White range
(B): Green range
(C): Red range

FUEL LEVEL GAUGE 0.

This meter (4) shows the level of fuel in the fuel tank.
During normal operation, the green range (B) should be lighted
up.
If the red range (A) lights up during operation, add fuel immedi­ately . If this is not done, the engine speed will become irregular
or an error display will be shown on the monitor.
(A): Red range
(B): Green range

REMARK
The display is not proportional to the amount of fuel

remaining.
If only the red range (A) lights up, there is less than 60

liters of fuel remaining.

3-13

EXPLANATION OF COMPONENTS OPERATION

ENGINE PREHEATING PILOT LAMP 0.

This lamp (5) indicates that the engine is being preheated by
the electrical heater during cold weather.
The engine controller detects the water temperature and auto­matically actuates the preheating in low temper atures when
starting the engine.

DISPLAY PANEL A (speed range display, engine speed) 0.

Meter (6) displays the transmission speed range being used on
the machine and engine speed.
When the transmission is in 1st FORWARD, the display

shows F1, and when it is in 1st REVERSE, the display
shows R1.

The peripheral bar graph indicates the engine speed. When

the red range lights up during running, shift the gear to a
lower speed to run the engine at a speed within the gr een
range.

Engine speed Speed range

Red

SWITCH DISPLAY PANEL B (Multi-information) 0.

This monitor (7) displays information related to the condition of
the machine on the top and bottom lines of the display portion.
The content of the display can be switched by operating the
Information switch and Buzzer cancel switch.

(1) Operating mode (normal operation screen)
Use this mode when operating the machine.

REMARK
When the starting switch is turned from the OFF position
to the ON position, the multi-information is set to the oper­ating mode.

The shift mode selected by operation of the GEARSHIFTING OPERATION USING PRESET MODE FUNCTION (
3-83 ) through the shift mode selection is displayed on the left side of the monitor.
The total operating hours of the machine is displayed at the bottom right of the monitor. (Use the service meter
function display to set the interval for periodic maintenance.)
When the engine is running, the service meter advances, even if the machine is not being used.
When the engine is running, the hourglass mark pilot display at the side of the meter lights up to show that the
meter is advancing.
The meter advances by 1 for every hour of operation, regardless of the engine speed.
If there is a failure in the machine, the failure code is also displayed on the top line. If a failure code is displayed,
carry out the remedy given in “OTHER TROUBLE ( 3-112 )“.

3-14

OPERATION EXPLANATION OF COMPONENTS

(2) Maintenance mode
The maintenance mode is displayed by continuing to turn the

information switch in the  direction for 2.5 seconds.
For details, see “METHOD OF USING DISPLAY PANEL B
(Multi-information) ( 3-21 )“.

3-15

EXPLANATION OF COMPONENTS OPERATION

SWITCH 0.

E (1) Starting switch E (5) Rear lamp switch
E (2) Buzzer cancel switch E (6) Fan selector switch
E (3) Preset mode switch E (7) Information switch
E (4) Head lamp switch E (8) Auto shift down switch

STARTING SWITCH 0.

This switch (1) is used to start the engine.
OFF

Key insertion-withdrawal position. None of electrical circuits
activate.

ON
Charging and electric device circuits activate. Keep key at ON
after starting.

START
At this key position, the starting motor will crank the engine.
Immediately after starting the engine, release the key which will
automatically return to the ON position.

3-16

OPERATION EXPLANATION OF COMPONENTS

BUZZER CANCEL SWITCH 0.

When this switch (2) is operated to the left or right, the alarm
buzzer stops.
When the information monitor is in the maintenance mode, this
switch can be operated to move the cursor to the left or right.
(a) position: Cancel
(c) position: Select

PRESET MODE SWITCH 0.

Turn the switch (3) to the right to set the desired transmission
speed range before starting (F1-R1,F1-R2,F2-R2) .
Position (a) : Manual mode
Position (b) : Preset mode

FRONT LAMP SWITCH 0.

This switch (4) lights up when the front lamp, left and right
working lamps on the front fender, and panel lamp light up.
(a) OFF position: Goes out
(b) ON position: Lights up

REAR LAMP SWITCH 0.

This switch (5) lights up when the rear lamp and panel lamp
light up.
(a) OFF position: Lamps are out
(b) ON position: Lamps light up

3-17

EXPLANATION OF COMPONENTS OPERATION

FAN ROTATION SELECTOR SWITCH 0.

Use this switch (6) to switch the fan to reverse or cleaning
mode.
Position (a): Normal mode
Position (b): Reverse mode
Position (c): Cleaning mode

Use the reverse mode to maintain the temperature in cold
areas. Use the cleaning mode to remove dirt when cleaning
the radiator.
In the cleaning mode, the fan always rotates at 100% speed.
Always stop the engine before operating the fan selector
switch.
If the fan selector switch is operated when the engine is run­ning, the fan operation confirmation lamp will flash to indicate
that it is impossible to operate the switch.

INFORMATION SWITCH 0.

This switch (7) is used to carry out the switching of the informa­tion monitor display mode and the switching of the cursor with
the maintenance mode.
(a) position: Cursor moves to left
(c) position: Cursor moves to right

AUTO SHIFT DOWN SWITCH 0.

When this switch (8) is operated to the right, if the travel speed
drops because of the load conditions when traveling, the trans­mission automatically shifts to low speed.
(a) OFF position: Automatic operation canceled
(b) ON position: Automatically shifts down to low speed

For details, see “AUTO SHIFT DOWN OPERATION ( 3-84 )“.

3-18

OPERATION EXPLANATION OF COMPONENTS

LAMP 0.

F (1) Warning lamp F (3) Fan reverse rotation lamp
F (2) Filter, oil change interval lamp

WARNING LAMP 0.

NOTICE
If the alarm buzzer sounds, stop work immediately and
carry out inspection and maintenance of the appropriate
point.

When the caution lamp for the B CAUTION and C CAUTION
groups on the machine monitor system flashes, and an abnor­mality has occurred in the electronic control system, this lamp
(1) also flashes at the same time.
If the lamp flashes, check the monitor panel to locate the
abnormality.
When the monitor inside the C CAUTION group flashes, the
alarm buzzer also sounds continuously.

3-19

EXPLANATION OF COMPONENTS OPERATION

FILTER, OIL CHANGE INTERVAL LAMP 0.

This lamp lights up when it comes near the time for replacing
the filter or oil.

FAN OPERATION CONFIRMATION LAMP 0.

This lamp lights up when the fan is rotating in reverse. If the
fan selector switch is operated when the engine is running, this
lamp flashes to warn the operator that the fan operation cannot
be switched.

3-20

OPERATION EXPLANATION OF COMPONENTS

METHOD OF USING DISPLAY PANEL B (Multi-information) 0.

EXPLANATION OF MODES AND CONTROLS 0.

Display panel B (1) has the function of displaying the follow-

ing four types of mode. (The diagram on the right shows

the normal screen before the mode display.)

Maintenance mode

This displays the time for replacing the filters or oil.

PM clinic auxiliary mode

This displays the engine speed and the oil pressure in the

hydraulic circuits.

Fault display mode

This displays the fault code is related to the electronic con-

trol.

Adjustment mode

This adjusts the brightness and contrast of the display.
There are variations (sub-items) in the four types of mode. For an explanation of the variat ions, se e the follo w-

ing items.

METHOD OF USING MAINTENANCE MODE ( 3-23 )

METHOD OF USING PM CLINIC AUXILIARY MODE ( 3-24 )

METHOD OF USING FAULT CODE DISPLAY MODE ( 3-24 )

METHOD OF USING USER ADJUST MODE ( 3-25 )
Each mode is operated by using information switch (2) and

buzzer cancel switch (3) on the dashboard in front of the

operator's seat.

After operating the switch, release the switch, and the

switch will return automatically to the center position as

shown in the diagram on the right.

The functions of each position of the switches are as fol-

lows.

<: Moves mode to left

>: Moves mode to right

: Selects mode

: Cancels mode
The four types of mode can be selected in a cycle by operating information switch (2) to > and < to give the fol-

lowing sequence: Maintenance mode ←→ PM clinic auxiliary mode ←→ Fault code display mode ←→ Adjust-

ment mode ←→ Maintenance mode.
From the normal mode before giving the mode display, if buzzer cancel switch (3) is operated to  and held for

2.5 seconds, the maintenance mode is displayed. After that, if information switch (2) is operated to >, the mode

changes to the PM clinic auxiliary mode. If information switch (2) is operated to <, the mode changes to the

user adjust mode.
When any mode is being displayed, if the buzzer cancel switch is operated to , the screen returns the normal

screen shown before the mode display.

METHOD OF SELECTING MODES 0.

1. When moving from the normal operation disp lay to a user

mode, the maintenance mode is displayed . Use the con-

trols to change the mode as follows.

> position: Go to PM clinic auxiliary mode

< position: Go to user adjust mode

 position: Go to normal operation screen

 position: Go to maintenance mode selection screen

20.

3-21

EXPLANATION OF COMPONENTS OPERATION

2. The diagram on the right shows the screen display for the
PM clinic auxiliary mode. Use the controls to change the
mode as follows.
> position: Go to fault code display mode
< position: Go to maintenance mode
 position: Go to normal operation screen
 position: Go to PM clinic auxiliary mode selection item
screen

3. The diagram on the right shows the screen display for the
fault code display mode. Use the controls to change the
mode as follows.
> position: Go to adjustment mode
< position: Go to PM clinic auxiliary mode
 position: Go to normal operation screen
 position: Go to fault code selection item screen

4. The diagram on the right shows the screen display for the
user adjust mode. Use the controls to change the mode as
follows.
> position: Go to maintenance mode
< position: Go to fault code display mode
 position: Go to normal operation screen
 position: Go to user adjust mode selection item screen

3-22

OPERATION EXPLANATION OF COMPONENTS

METHOD OF USING MAINTENANCE MODE 0.

NOTICE
This function is only a guideline. If dirty or oil or filters are found during daily maintenance, replace them
immediately.
If the controllers or monitor panel are replaced, the timer for this function will not work properly. Pleas e
contact your Komatsu distributor for replacement.

The maintenance mode shows the replacement interval for the
oil filters and oil on the monitor.
The content of the display is as follows.
(1) The item is displayed.
(2) The time remaining until replacement is displayed.
(3) The number of times that replacement has been made until

now is displayed.

The display items can be displayed in order by operating the
information switch to the left or right (<, >).

Display Item Time to 1st replacement

1. ENG.OIL Engine oil 500h 500h

2. ENG.FLT Engine oil filter 500h 500h

3. FUEL.FLT Fuel filter 500h 500h

4. HYD.FLT Hydraulic oil filter 500h 2000h

5. CORR.FLT Corrosion resistor 1000h 1000h

6. BYPS.FLT Bypass filter (*) 0h 0h

7. DAMP.OIL Damper oil 2000h 2000h

8. OIL Final drive oil 5 00h 2000h

9. HYD.OIL Hydraulic oil 500h 2000h

10. POWL.OIL Power train oil 500h 1000h

11. POWL.FLT Power train oil filter 500h 500h

12. HSS.FLT HSS charge filter (*) 0h 0h

(*) Although the item of the mark is displayed, it is not used with this machine.
When the oil or filter has been replaced, select the applicable
item, then operate the buzzer cancel switch to .
The screen will ask if you want to display the replacement his­tory.
Operate the information switch to select YES, then operate the
buzzer cancel switch to . Th e replacement account will
increase by 1, the replacement interval will be reset, and the
oil, filter change interval lamp will go out.
When this is done, if the maintenance caution lamp does not
go out, there is another item close to the replacement time, so
check the situation.

Time to 2nd and

following replacements

3-23

EXPLANATION OF COMPONENTS OPERATION

REMARK
To return to the function selection mode, operate the
buzzer cancel switch to .

METHOD OF USING PM CLINIC AUXILIARY MODE 0.

CAUTION

When moving the work equipment or setting the transmission to the travel position when carrying out
measurements, check carefully that the situation is safe.

The PM clinic auxiliary mode displays the engine speed, hydraulic oil pressure, and other items on display panel
B.
Display panel B displays the item on the top line (1), and the
measured value on the bottom line (2).

The display items consist of the six items in the table below.
The items can be selected by operating the information switch (<, >).

Display Item Measured value
01-ENG.SPEED Engine speed Speed (rpm)
02-BOOST PRESSURE Boost pressure Pressure (kPa)
03-HYD.PUMP PRES Hydraulic oil pressure Pressure (MPa)
04-BATTERY VOLT Battery voltage Voltage (mV)

REMARK
Items such as the engine speed fluctuate and are difficult to see during the measurement. In such

cases, operate the buzzer cancel switch to . This makes it possible to hold the display of the value.

To cancel this mode, operate the buzzer cancel switch again to .
To return to the function selection mode, operate the buzzer cancel switch to .

METHOD OF USING FAULT CODE DISPLAY MODE 0.

NOTICE
The fault items observed by this function are connected with the electron ic contr ol, so ev en if a fault code
is not displayed, there is probably some problem with the machine. If the operator feels any abnormality
with the machine, the machine should be stopped immediately and checked.

3-24

OPERATION EXPLANATION OF COMPONENTS

When any disconnection or short circuit in any sensor is detected, th e location and fault co de are displayed by a 6­digit code on display panel B. When contacting your Komatsu distributor, inform your distributor of the code at the
same time.
If the failure observation function has not grasped the condition
of the machine, the display is as shown in the diagram on the
right.

With this function, existing failures can be displayed up to a
maximum of 20 items.
If multiple failures are occurring, the display automatically
changes every 2 seconds, so check the code.
The display is shown repeatedly.

REMARK
To return to the function selection mode, operate the buzzer cancel switch to .

METHOD OF USING USER ADJUST MODE 0.

With the user adjust mode, the brightness of the panel screen backlighting and the contrast of the liquid crystal
panel can be changed, or the cooling fan can be set to maximum speed to clean the radiator when it is clogged.
These are displayed on display panel B.

1. Adjusting backlighting of liquid crystal display
The diagram on the right is the mode for adjusting the
brightness of the backlighting of the liquid crystal panel. On
this screen, operate the buzzer cancel switch to  to switch
to the screen to adjust the brightness.

The brightness can be adjusted by operating the information
switch.
The higher the number, the brighter the screen becomes; the
lower the number, the darker the screen becomes.
> position: Number increases
< position: Number decreases

3-25

EXPLANATION OF COMPONENTS OPERATION

When the buzzer cancel switch is operated to , the bright­ness of the liquid crystal display backlighting is set.

2. Adjusting backlighting of message display
The diagram on the right is the mode for adjusting the
brightness of the backlighting of the message display. On
the screen, operate the buzzer cancel switch to  to switch
to the screen for adjusting the brightness.

The brightness can be adjusted by operating the information
switch.
The higher the number, the brighter the screen becomes; the
lower the number, the darker the screen becomes.
> position: Number increases
< position: Number decreases

When the buzzer cancel switch is operated to , the bright­ness of the message display backlighting is set.

3. Adjusting contrast of liquid crystal message display
The diagram on the right is the mode for adjusting the con­trast of the liquid crystal message display.
On this screen, operate the buzzer cancel switch to  to
switch to the screen to adjust the contrast.

3-26

OPERATION EXPLANATION OF COMPONENTS

The contrast can be adjusted by operating the information
switch.
The higher the number, the deeper the screen becomes; the
lower the number, the lighter the screen becomes.
> position: Number increases
< position: Number decreases

When the buzzer cancel switch is operated to , the contrast
of the liquid crystal display is set.

REMARK

To return to the function selection mode, operate the buzzer cancel switch to .
The brightness of the backlighting of the monitor panel differs according to whether the front lamp is

lighted up or not. Entering this mode when the front lamps are lighted up makes it possible to ad just
the brightness when the front lamps are lighted up. In the same way, entering this mode when the
front lamps are not lighted up makes it possible to adjust the brightness when the front lamps are not
lighted up.

3-27

EXPLANATION OF COMPONENTS OPERATION

SWITCH 0.

(1) Horn switch (4) Cigarette lighter (machines equipped with cab)
(2) Room lamp switch (5) Accessory socket
(3) Wiper switch

HORN SWITCH 0.

The horn sounds when the bu tton (1) at the r ear of the blade
control lever at the right side of the operator's seat is pressed.

ROOM LAMP SWITCH 0.

This (2) lights up the room lamp.
ON position: Lamp lights up
OFF position: Lamp is out

3-28

ON

OFF

OPERATION EXPLANATION OF COMPONENTS

WIPER SWITCH 0.

This (3) activates the wipers.
The wiper switches are as follows.
(LH) Left door
(FF) Front window
(RH) Right door
(RR) Rear window
(INT) Wiper intermittent operation switch
This is also used as the window washer switch.
The switch is operated as follows.

Wiper only

If this is switched on, the wiper will start.

OFF

ON

Wiper and window washer

If this is kept pressed to the ON position while the wiper is
working, water will be sprayed out.

REMARK
When installing the cab, check the colors of the washer
tank and window washer hoses, and be sure to connect
correctly.

A Left door (blue)
B Front window (no color)
C Right door (red)
D Rear window (black)

Front of
machine

ON

OFF

A

B

C

D

3-29

EXPLANATION OF COMPONENTS OPERATION

A Red - Right door
B Blue - Left door
C Black - Rear window
D Colorless - Front window
E Washer tube
F From fuse box red (back up power souce)

Vieuw Y

F

A

B
C
D

E

CIGARETTE LIGHTER 0.

This (4) is used to light cigarettes.
When the cigarette lighter is pushed in, it will return to its origi­nal position after a few seconds, so take it out to light your cig­arette.
Cigarette lighter capacity: 120W

NOTICE
This cigarette lighter is 24V. Do not use it as the power
source for 12V equipment.

ACCESSORY SOCKET 0.

This (5) is used as the power source for a wireless or othe r 12V
equipment.

Accessory socket capacity: 60W (12V x 5A)

3-30

OPERATION EXPLANATION OF COMPONENTS

CONTROL LEVERS, PEDALS 0.

(1) Fuel control dial (5) Parking lever
(2) Joystick (steering, directional and gear shift lever) (6) Safety lever
(3) Brake pedal (7) Blade control lever
(4) Deceleration pedal (8) Ripper control lever

FUEL CONTROL DIAL 0.

This dial (1) is used to control the engine speed and output.
(a) Low idling position: Turn fully to the left
(b) High idling position: Turn fully to the right

REMARK
When stopping the engine, set the s tarting switch to the
OFF position.

MAX

MIN

3-31

EXPLANATION OF COMPONENTS OPERATION

JOYSTICK (STEERING, DIRECTIONAL AND GEAR SHIFT LEVER) 0.

(PCCS lever)
This lever (2) is used to switch between forward and reverse to
steer and gear shift the machine or carry out counter rotation
turns.

REMARK
PCCS: Palm command control system

Forward-reverse shifting

Position (a): FORWARD
Position (b): REVERSE
Position N: Neutral
Operate to the front to drive forward; operate to the rear to
drive in reverse.

Steering

(L) Left turn
(R) Right turn
With the lever operated to the front or rear, operate the lever partially to the left or right to turn the machine. The
machine will turn gradually in the same direction as the lever is operated.
If the lever is operated fully to the left or right, the machine will turn in a small radius.

REMARK
If the lever is released when steering the machine, the lever will return to the (a) position or the (b) posi-

tion and the machine will be returned to straight movement.

Gear shifting

When the steering, directional, and gearshift lever is at the
FORWARD or REVERSE position and switch (c) or switch (d)
is pushed, the transmission speed will change.
UP switch (c): Each time the switch is pressed, the transmis-

sion will shift up one speed.

DOWN switch (d): Each time the switch is pressed, the trans-

mission will shift down one speed.

For details of the maximum speed in each speed range, see
“SPECIFICATIONS ( 5-2 )“.

REMARK
The speed range being used is displayed on the monitor panel according to the gearshift operation.
<Example>
Neutral: N is displayed on the display panel.
FORWARD 2nd: F2 is displayed on the display panel.
REVERSE 3rd: R3 is displayed on the display panel.

When the parking lever is locked, P is displayed.
For details of the method of shifting gear according to the shift mode, see the “SHIFTING GEAR ( 3-82

)“. Shift mode selection means that the selected speed range is display ed at the N position before
starting.

3-32

OPERATION EXPLANATION OF COMPONENTS

Operating counterrotation turn

WARNING

When operating the counterrot ation turn, if the load on the
left and right is not balanced, the machine may make a
pivot turn, so check the ground conditions and be careful
not to hit any obstacles when carrying out the operation.

With the lever at the N position, operate the lever partially in
the direction of turn. The left and right tracks will rotate in
opposite directions, and the machine will make a slow counter­rotation turn. If the lever is operated further, the speed of the
counterrotation turn will increase.
(R): Right counterrotation turn
(L): Left counterrotation turn

BRAKE PEDAL 0.

WARNING

Do not place your foot on this pedal unnecessarily.

Depress the pedal (3) to apply the right and left brakes.

DECELERATION PEDAL 0.

WARNING

Do not place your foot on this pedal unnecessarily.
When passing over the top of a hill or when a load is

dumped over a cliff, the load is suddenly reduced, so
there is danger that the travel speed will also increase
suddenly. To prevent this, depress the decelerator
pedal to reduce the travel speed.

This pedal (4) is used when reducing the engine speed or stop­ping the machine.
When switching between forward and reverse, or when stop­ping the machine, use this pedal to reduce speed.

3-33

EXPLANATION OF COMPONENTS OPERATION

PARKING LEVER 0.

WARNING

When the machine is parked, always set the parking lever
to the LOCK position.

This lever (5) is used to apply the parking brake.

REMARK
When operating the parking lever to the LOCK position,

return the steering, directional, and gearshift lever to
the N position first.

When starting the engine, if the parking lever is not at

the LOCK position, the limit switch is actuated and it is
impossible to start the engine.

Free

Lock

SAFETY LOCK LEVER 0.

WARNING

When standing up from the ope rator's seat , always se t

the safety lever securely to the LOCK position.

If the blade control and ripper control levers are not

locked and are touched by accident, it may lead to
serious injury or damage.

If the safety lever is not set securely to the LOCK po si-

tion, the lock may not be applied.

Check that it is in the position shown in the diagram.
When parking the machine or when carrying out main -

tenance, always lower the blade and ripper to the
ground, then set the safety lever to the LOCK position .

Free

Lock

This safety lever (6) is a device to lock the blade control and ripper control levers.
When it is set to the LOCK position, the TILT, RAISE, LOWER, and FLOAT operations are locked.

REMARK
When starting the engine, to ensure safety, always set the safety lever to the LOCK position.

BLADE CONTROL LEVER 0.

This lever (7) is used to raise the blade.
Single tiltdozer

3-34

OPERATION EXPLANATION OF COMPONENTS

This lever is used to raise or tilt the blade.
Lifting control
(a) RAISE:
(b) HOLD:
Blade is stopped and held in this position.
(c) LOWER:
(d) FLOAT:
Blade will move freely according to external force.

Raise

REMARK
When released form FLOAT position, this lever will not
return to HOLD position, so it must be moved back by
hand.

TILT OPERATION
(A) RIGHT TILT
(B) LEFT TILT

Lower

Right tilt

Left tilt

RIPPER CONTROL LEVER 0.

This lever (8) is used to operate the ripper.
(a) RAISE
(b) HOLD: Ripper is stopped and held in the same position.
(c) LOWER

Raise

Lower

3-35

EXPLANATION OF COMPONENTS OPERATION

DUST INDICATOR 0.

This is on the air cleaner bracket inside the engine room.
This device indicates that the air cleaner element is clogged.
For details on how to clean the element, see “CHECK, CLEAN
AND REPLACE AIR CLEANER ELEMENT ( 4-21 )“.

3-36

OPERATION EXPLANATION OF COMPONENTS

FUSE BOX 0.

NOTICE
Before replacing a fuse, be sure to turn off the starting switch.

The fuses protect the electrical equipment and wiring from burning out.
If the fuse becomes corroded, or white powder can be seen, or the fuse is loose in the fuse holder, replace the
fuse.
Replace a fuse with another of the same capacity.
Fuse boxes is installed under the battery cover.
Circuit breaker is installed the recirculated air filter cover.
(1) Fuse box FS1
(2) Fuse box FS2

(3) Circuit breaker

Cab (machines equipped with cab)
Fuse box is installed at the bottom of the overhead panel.

3-37

EXPLANATION OF COMPONENTS OPERATION

CIRCUIT BREAKER 0.

If the starting switch does not work even when the starting

switch is turned to the ON position, open the recirculated air
filter cover.

If excessive current flows through the circuit breaker, it cuts

off the electric circuit to prevent damage to the electrical
components and wiring.

To restore the electric circuit after it has been cut off, push in

reset button (3). (This springs out when the circuit is cut
off.)
If the electric circuit is normal, reset button (3) will stay
pushed in. If it comes out immediately when it is pushed in,
the electric circuit must be checked.

No

(1) 20A Starting switch
(2) 20A Air conditioner

REMARK
The circuit breaker is a device installed in electric circuits where a large current flows. It is installed to
protect the electric circuit. It protects the electric components and wiring from damage caused by an
abnormal current in the same way as a normal fuse. After repairing and restoring the location of the
abnormality, there is no need to replace the breaker. It can be used again.

Fuse

capacity

Circuit

FUSE CAPACITY AND NAME OF CIRCUIT 0.

FUSE BOX I 0.

(1) Fuse box fs1

No.

1 30A Additional heater, Spere power source
2 20A Horn, Intake air heater

Fuse

capacity

Circuit

320AHead lamp
420ARear lamp
5 20A Transmission Steering controller

(2) Fuse box fs2

No.

(1) 15A Monitor panel
(2) 20A Fuel pump
(3) 30A Air conditioner
(4) 20A Backup alarm
(5) 30A Battery power source (direct from battery)

3-38

Fuse

capacity

Circuit

OPERATION EXPLANATION OF COMPONENTS

FUSE BOX II 0.

No.

(1) 10A Radio memory
(2) 20A Radio, lamp, cigarett e ligh te r
(3) 20A Rear heating wire glass (If equipped)
(4) 10A Rear wiper
(5) 10A Front wiper
(6) 10A Left and right door wiper

Fuse

capacity

Circuit

FUSIBLE LINK 0.

If the starting motor does not work even when the starting
switch is turned to the ON position, there may be a disconnec­tion in fusible links (2) and (3) on top of the wiring, so remove
the cover (1) at the side of the battery box cover on the left
side of the machine and check or replace.

Capacity of (2): 32 A
Capacity of (3): 96 A

REMARK
A fusible link refers to the large-sized fuse wiring inst alled in the high current flow portion of the circuit to
protect electrical components and wir ing from burning, similarly to an ordinary fuse.

3-39

EXPLANATION OF COMPONENTS OPERATION

DOOR OPEN LOCK 0.

Use this when your want to keep the door held open.

1. Push the door against door catch (1). The door will be held
by the door catch.

2. To release the door, move lever (2) inside the cab to the
front of the cab. This will release the catch.

NOTICE
When keeping the door open, fix it securely to the

catch.

Always close the door when traveling or carrying out

operations. Leaving the door open will cause the door
to break.

Keep the door locked open securely. The door may

swing closed because of the vibration.

SASH GLASS INTERMEDIATE LOCK 0.

When working with the cab sash glass open, use this lock to
prevent the glass from chattering.
When the lever is at the FREE position, the glass can be

opened or closed.

When the lever is moved to the LOCK (up or down) positio n,

the glass is fixed in position.

NOTICE
Always close the window when traveling or carrying out
operations. Leaving the window open will cause the win­dow to break.

Free

Lock

3-40

OPERATION EXPLANATION OF COMPONENTS

DOOR POCKET 0.

This is inside the left and right doors. Use it for keeping things.
Do not put the heavy tools or other heavy objects in it.
If the pocket is dirty, loosen three bolts (1), then remove the
pocket and rinse it.

ASHTRAY 0.

This is on the left side of the operator's seat.
Always make sure that you extinguish the cigarette before clos­ing the lid.

3-41

EXPLANATION OF COMPONENTS OPERATION

CAR STEREO, HANDLING 0.

EXPLANATION OF COMPONENTS 0.

(1) Power switch/volume (8) Cassette door
(2) Auto-store/preset scan button (9) Fast forward, rewind buttons
(3) Bass control knob (10) Preset buttons
(4) Treble control knob (11) Metal tape button
(5) Loudness button (12) Manual tuning buttons
(6) Time/radio display se lector button (13) Seek tuning buttons
(7) Tape eject button (14) Band selector button

(A) Band display (E) Tape direction display
(B) Metal tape display (F) Preset channel display
(C) FM stereo reception display (G) Time/frequency display
(D) Loudness display

3-42

OPERATION EXPLANATION OF COMPONENTS

POWER SWITCH/VOLUME 0.

Turn this knob (1) to the right until it clicks to turn the power on.
Turn it further to increase the volume.

AUTO-STORE/PRESET SCAN BUTTON 0.

Use this button (2) to actuate the preset scan and auto-store
functions.
Auto-store

Each time this button is pressed for more than 2 seconds
while in radio reception, this auto-store function automati­cally starts to search for the desired station within a receiv­able band, and memorize the frequency in the preset
memory. During this scanning process, the frequency
shown in the right side of display continues to change. This
indicates that each frequency is memorized in the auto­store.

REMARK
The auto-store function cannot be used when the channel
display is flashing.
When the display is flashing, the preset scan function is
being used.

BASS CONTROL KNOB 0.

Turn this button (3) to the left to reduc e the low tone s ; tu rn it to
the right to emphasize the low tones.
Direction (a) : Low tone reduced
Direction (b) : Low tone emphasized

TREBLE CONTROL KNOB 0.

Turn this button (4) to the left to reduce the low tones; turn it to
the right to emphasize the high tones.
Direction (a): High tone reduced
Direction (b): High tone emphasized

3-43

EXPLANATION OF COMPONENTS OPERATION

LOUDNESS BUTTON 0.

This button (5) is used when pl aying at low volume. It makes it
possible to hear more easily by emphasizing the low tone when
the low tones are weak.
Push button : Actuated (ON)
Push button again : Canceled (OFF)

TIME/RADIO DISPLAY SELECTOR BUTTON 0.

This button (6) is used to switch between the “Radio/tape dis­play“ and the “Time display“.

Correcting time

Press the button to set to the time display.

(A) Correcting hour :

Keep the DISP button pressed and press the bottom tuning
button (H) to correct the hour.

(B) Correcting minute :

Keep the DISP button pressed and press the top tuning but­ton (M) to correct the minute.

TAPE EJECT BUTTON 0.

This button (7) is used to stop the tape and to eject the cas­sette.
When this button is pressed, the tape is ejected and the radio
plays.

3-44

OPERATION EXPLANATION OF COMPONENTS

CASSETTE DOOR 0.

Set the cassette with the exposed portion of the tape on the
right side and insert it in cassette door (8).

FAST FORWARD, REWIND BUTTONS 0.

These buttons (9) are used to fast forward or rewind the tape.
Fast forward/rewind

If you press the button pointing in the same direction as the
arrow indicating the direction of play, the tape will be fast
forwarded; if you press the button pointing in the opposite
direction, the tape will be rewound.
To stop the tape, lightly press the button that is not locked.
The fast forward or rewind operation will be canceled.

PRESET BUTTONS 0.

These buttons (10) are used to call up the broadcast station
frequencies preset in memory for each of buttons No.1 to No.6.
It is possible to preset 18 stations (FM:12; AM:6) with these
buttons.

METAL TAPE BUTTON 0.

(used also for preset button No.5)
This button (11) is used when playing a metal or chrome tape.
This button is used also for preset button No.5. When it is
pressed, “MTL“ appears on the display.

3-45

EXPLANATION OF COMPONENTS OPERATION

MANUAL TUNING BUTTONS 0.

These buttons (12) are used for manual tuning.
When “TUN /\“ button is pressed, th e frequ ency goes up 9 kH z
for AM or 0.1 MHz for FM; when “TUN \/“ button is pressed, the
frequency goes down 9 kHz for AM or 0.1 MHz for FM.
If the button is pressed down and held, the frequency will
change continuously.

SEEK TUNING BUTTONS 0.

These buttons (13) are used to seek tuning.
When the “SEEK UP“ button is pressed, the frequency auto­matically goes up; when the “SEEK DOWN“ button is pressed,
the frequency automatically goes down.
When the next station that can be received is found, it automat­ically stops.

BAND SELECTOR BUTTON 0.

When this button (14) is pressed, the band is switched between
FM1, FM2, and MW (AM). The band is shown on the display.

3-46

OPERATION EXPLANATION OF COMPONENTS

METHOD OF OPERATION 0.

METHOD OF SETTING PRESET BUTTONS 0.

To listen to a preset station, use band selector button (1) to
select AM, FM1, or FM2, then press the preset switch number
to listen to the desired station.
It is possible to preset six AM stations and 12 FM stations
(FM1: 6, FM2: 6).

1. If you are playing a cassette, press the tape eject button to
stop the tape.

2. Select the station to be preset.
Use band selector button (1) to select MW (AM), FM1, or
FM2, then use the manual tuning button to select the fre­quency of the broadcasting station.

3. Press manual memory button (2) or seek tuning button (3).

4. Press preset button (4) of the number to be preset for 2 sec­onds while the frequency display is being shown on the dis­play. (The preset channel and frequency are displayed and
the presetting is completed).

5. Repeat Steps 2 to 4 to preset other stations.

REMARK
Use Steps 2 to 4 also when changing the setting of a

preset switch to another station.

When the power is disconnected, such as when the bat -

tery is replaced, all the settings are deleted, so preset
the stations again.

MANUAL MEMORY BUTTON 0.

Select the station to be preset with manual tuning button (1) or
seek tuning button (2), then ke e p button No.1 to button No .6 of
button (3) pressed for 2 seconds while the frequency is being
displayed to preset the station.

3-47

EXPLANATION OF COMPONENTS OPERATION

LISTENING TO RADIO 0.

1. Turn the starting switch ON, then turn power switch (1) ON.

2. Set band selector button (2) to AM or FM.

3. Select the station with the preset buttons or manual tuning
button (3).

4. Adjust the volume, balance, and tone as desired.

5. When turning the radio OFF, turn power switch (1) to the left
until there is a click.

REMARK

T o switch to the radio when listening to a cassette, press the cassette eject button to stop the tape.
If you insert a cassette when listening to the radio, the tape will start to play.

LISTENING TO CASSETE TAPE 0.

1. Turn the starting switch ON, then turn power switch (1) ON.

2. Set the cassette with the exposed portion of the tape on the
right side and push it into the cassette door. The tape will
automatically start playing.
If the arrow indicating the direction of play is pointing to the
right, the top side is being played; if the arrow is pointing to
the left, the bottom side is being played.
When the tape reaches the end, it is au tomat ically r ever sed
and the other side starts to play.

3. When finishing with the tape, press the cassette eject button
to eject the tape and automatically switch to the radio.

3-48

OPERATION EXPLANATION OF COMPONENTS

REVERSING TA PE 0.

When listening to the tape, press both FAST FORWARD,
REWIND buttons (A) and (B) at the same time lightly.
When this is done, the tape direction display will be reversed.

PRECAUTION WHEN USING 0.

WARNING

If a voltage greater than the sp ecified voltage is input, it may cause fire, electrocution, or other failure.

Never input any voltage other than the specified voltage.

Places inside the radio are under high voltage. Do not remove the cover.
Do not carry out any modification. This may cause fire, electrocution, or other failure.
If the sound cannot be heard, no display is given, or any other abnormality occurs, turn off the power

switch and ask your Komatsu distributor as soon as possible to carry repairs.

Stow the antenna when traveling in places with low overhead clearance.
To ensure safety during operations, keep the volume at a level where it is possible to hear other machines.
If water gets inside the speaker case or radio (a uto tunin g) , it may cau se a ser ious pr ob lem, take care not to let

water get in these items.

Do not wipe the scales or buttons with benzene, thinner, or any other solvent. W ipe with a soft dry clot h. Us e

a cloth soaked in alcohol if the equipment is extremely dirty.

NOTICE
Handling cassette ta pe

Clean the tape head approx. once a month with a commercially available head cleaning tape.
Do not leave the tape any place where it is exposed to direct sunlight, any place that is excessively

dusty, or any place where there is a magnetic field.

Do not use 120-minute tapes. The tape is thin and it easily gets caught up inside the machine.
If the tape is slack, it easily gets caught up inside the machine. Use a pencil to wind in the tape to

remove any slack.

Do not use any cassette tape if the label has started to come off. It may cause defective rotation, or it

may be impossible to get the tape out of the machine.

3-49

EXPLANATION OF COMPONENTS OPERATION

AIR CONDITIONER 0.

GENERAL LOCATIONS AND FUNCTION OF CONTROL PANEL 0.

DEF

DEFDEF

DEF

Temperature lev el
indicator lamp

(1) Fan switch (3) Fresh/recirc selector switch
(2) Air conditioner switch (4) Temperature co nt ro l swit ch

FOOT

DEF

FAN SWITCH 0.

This switch (1) can be used to adjust the air flow to four stages.
It also acts as the main switch for the air conditioner . When the
OFF switch is pressed, the fan stops.
When the switch is pressed, the indicator lamp above the
switch lights up to display the air flow.

3-50

OPERATION EXPLANATION OF COMPONENTS

AIR CONDITIONER SWITCH 0.

This switch (2) is used to start or stop the cooling or dehumidi­fying function.
When the fan switch is turned ON and the air conditioner
switch is pressed, the indicator lamp above the switch lights up.
When the switch is pressed again, the switch is turned OFF
and the indicator lamp goes out.

REMARK
When fresh air is taken into t he cab, a ir pressur e in the cab
increases, which prevents the dust from entering. When
neither heating nor cooling is needed, bring in clean fresh
air to prevent the dust from coming in with your preferred
air flow.

FRESH/RECIRC SELECTOR SWITCH 0.

This switch (4) changes between internal air circ ula tio n an d ex te rn al air intake.
When pressing the switch, the indicator lamp on the top of switch lights up.

Internal air circulation
This switch (4) is used when wishing to quickly cool or warm
the cab or when the air inside the cab is stale.

External air intake
This switch (4) is used to cool or warm the cab with the external
air intake. Also, it is used for fresh air intake or to remove con­densation on windows.

TEMPERATURE CONTROL SWITCH 0.

The temperature can be adjusted with this switch (5) by press­ing and holding the up or down button.
The temperature level indicator lamps light up to display the
temperature of the air coming from the vents.
The more the blue lamps light up, the lower the temperature is.

The color of the indicator lamp changes while the switch is
being pressed.
When the temperature reaches the desired level, release the
switch to set the temperature.

The settings for each mode are retained in memory even when the starting switch is turned OFF.
However, in the following cases, the settings must be made again.

When the machine has been out of use for more than 7 days
When the battery voltage is extremely low
When there has been abnormal interference from outside

3-51

EXPLANATION OF COMPONENTS OPERATION

When the fan switch is turned OFF (the setting is not kept in memory with only the air conditioner switch)
If the air conditioner is used at the FRESH position, the inside of the cab will be pressurized and this will prevent

the entry of dust.
The higher the position of the fan switch, the more effective the pressurizing becomes.

METHOD OF OPERATION 0.

Switch

Condition of use

Rapid HI ON All blue RECIRC

Cooling

Normal HI - LO ON

Fan switch

Air conditioner

switch

Temperature

control switch

More than half

are blue

FRESH/RECIRC

selector switch

FRESH

Dehumidifying,

heating

Rapid HI OFF All red RECIRC

Heating

Normal HI - LO OFF

Defroster HI ON

Vetilation or pres-

surizing

When carrying out the defrosting, if the temperature control
switch is set so that all lamps are red, this will improve the per­formance for defrosting and demisting.

HI - LO ON

HI - LO OFF All blue FRESH

More than half

More than half

More than half

are red

are red

are red

FRESH

FRESH

FRESH

WHEN NOT USING THE AIR CONDITIONER REGULARLY 0.

Run the air conditioner at cooling or dehumidification + heating for several minutes from time to time to prevent the
loss of the oil film at various parts of the compressor.

REMARK
If the temperature inside the cab is low, the air conditioner may not work. In such cases, use the reci rcu­lated air to heat up the inside of the cab, then turn the air conditioner switch on to run the air conditioner.

3-52