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
FOREWORDFOREWORD
FOREWORD1
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 opera tion 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 thoroughly
and be sure that you understand them fully.
Keep this manual in the storage location f or the opera tion and ma intenance ma nual given below, and have
all personnel read it periodically.
If this manual has been lost or has become dirty and cannot be read, request a replacement manua l 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 count ry, consult Komatsu or your Komatsu distributor before operating
the machine.
Location to Keep Operation & Maintenance Manual
Operation and Maintenance Manual pocket at the rear of the
operator's seat
1-2
FOREWORDSAFETY INFORMATION
SAFETY INFORMATION1
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 lock lever in the LOCK position.
If you accidentally touch the control lev ers 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 INFORMATIONFOREWORD
q 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
Safety labels using pictogram
Part No.
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 me thod 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 corres pond to the numbers in ( ) in the text. (For example: 1 -> (1))
1-4
FOREWORDSAFETY INFORMATION
Noise emission levels1
Two labels ind icating the machine noise level a re affixed on the
machine.
q Sound pressure level at the operator’s station, measured
according to ISO6396 (Dynamic test method, simulated
working cycle).
q 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 levels1
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.
q 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.
q 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 acceleration value for the body is 0.52 m/s².
1-5
SAFETY INFORMATIONFOREWORD
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.
Operating condition:
(TRACTOR DOZER:) Dozing and spreading material through
forward/reversing motion
Guide to Reduce Vibration Levels on Machine1
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
q Tire pressures (for wheeled machines), tension of
crawler (for crawler machines)
q Brake and steering systems
q Controls, hydraulic system and linkages
3. Keep the terrain where the machine is working and traveling in good condition
q Remove any large rocks or obstacles
q Fill any ditches and holes
q Site manager should provide machine operators with
machine and schedule time to maintain terrain conditions
4. Use a seat that meets ISO 7096 and keep the seat maintained and adjusted
q Adjust the seat and suspension for the weight and size
of the operator
q Wear seat belt
q Inspect and maintain the seat suspension and adjust-
ment mechanisms
5. Steer, brake, accelerate, shift gears (for wheeled
machines), and move the attachment levers and pedals
slowly so that the machine moves smoothly
1-6
FOREWORDSAFETY INFORMATION
6. Adjust the machine speed and travel path to minimize the
vibration level
q When pushing with bucket or blade, avoid sudden
loading; load gradually
q Drive around obstacles and rough terrain conditions
q Slow down when it is necessary to go over roug h ter-
rain
q Make the curve radius of traveling path as large as
possible
q Travel at low speed when traveling around sharp
curves
7. Minimize vibrations for long work cycle or long distance
traveling
q Reduce speed to prevent bounce
q Transport machines long distances between worksites
8. The following guidelines can be effective to m inimize risks
of low back pain
q Operate the machine only when you are in good
health.
q Provide breaks to reduce long periods of sitting in the
same posture
q Do not jump down from the cab or machine
q Do not repeatedly handle and lift loads
1-7
INTRODUCTIONFOREWORD
INTRODUCTION1
This Komatsu machine is designed to be used mainly for the following work:
q Dozing
q Cutting into hard or frozen ground or ditching
q Felling trees, removing stumps
q Pushing
q Ripping
For further details, see “WORK POSSIBLE USING BULLDOZER (3-127)“ and “RIPPER OPERATION (3-120)“.
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.
1-8
FOREWORDINTRODUCTION
VISIBILITY FROM OPERATOR'S SEAT1
The visibility standards (ISO 5006) for this machine require a view shown in the diagram below.
PROXIMITY VISIBILITY1
The visibility of this machine in the area 1 m from the outside surface of the machine at a height of 1.5 m is shown
in the diagram below. The hatched area (A) shows the area where the view is blocked by part of the machine when
mirrors or other aids to visibility are installed as standard. Please be fully aware that there are places that cannot
be seen when operating the machine.
12M CIRCUMFERENCE VISIBILITY1
The visibility at a radius of 12 m from the machine is as shown in the diagram below. The hatched areas (B) show
the areas where the view is blocked when mirrors or other aids to visibility are installed as standard. Please be
fully aware that there are places that cannot be seen when operating the machine.
1-9
INTRODUCTIONFOREWORD
BREAKING IN THE MACHINE1
NOTICE
Your Komatsu machine has been thoroughly adjusted and tested before shipment from the factory. However, ope rating the machine under full load before bre aking the machine in can adverse ly affect the perf ormance and shorten the machine life.
Be sure to break in the machine for the initial 100 hours (as indicated on the service meter).
Make sure that you fully understand the content of this manual, and pay careful attention to the following points
when breaking in the machine.
q Run the engine at idle for 15 seconds after star ting it. During this time, do not oper ate the control levers or fuel
control dial.
q Idle the engine for 5 minutes after starting it up.
q Avoid operation with heavy loads or at high speeds.
q Immediately after starting the engine, avoid sudden starts, sudden acceleration, unnecessary sudden stops,
and sudden changes in direction.
1-10
FOREWORDNECESSARY INFORMATION
NECESSARY INFORMATION1
When requesting service or ordering replacement parts, please inform your Komatsu distributor of the following
items.
PRODUCT IDENTIFICATION NUMBER (PIN), MACHINE SERIAL NO. PLATE 1
Under the front of the console box on the right side of the operator's seat.
The design of the nameplate differs according to the territory.
1-11
NECESSARY INFORMATIONFOREWORD
EPA REGULATIONS, EN GINE NUMBER PLATE1
q On the upper of the engine starting motor on the right side of the machine.
q This also acts as the EPA plate.
q This is on the top surface of the muffler mounting bracket on the left side of the machine.
q This also acts as the EPA plate.
EPA: Environmental Protection Agency, U.S.A.
1-12
FOREWORDNECESSARY INFORMATION
BLADE SERIAL NO. PLATE POSITION1
This is located on the upper right of blade back surface.
RIPPER SERIAL NO. PLATE POSITION1
This is located on the left side surface of ripper beam.
ROPS, FOPS NO. PLATE POSITION1
This is at the top rear of the cab.
POSITION OF SERVICE METER1
On top of the machine monitor
1-13
NECESSARY INFORMATIONFOREWORD
TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR1
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
GENERAL PRECAUTIONS ................................................................................................................................. 2-9
PRECAUTIONS FOR OPERATION................................................................................................................... 2-18
BEFORE STARTING ENGINE ................................................................................................................. 2-18
PRECAUTIONS FOR MAINTENANCE.............................................................................................................. 2-27
1-17
CONTENTS
OPERATION
GENERAL VIEW .................................................................................................................................................. 3-2
GENERAL VIEW OF MACHINE................................................................................................................. 3-2
GENERAL VIEW OF CONTROLS AND GAUGES..................................................................................... 3-3
EXPLANATION OF COMPONENTS....................................................................................................................3-5
CIRCUIT BREAKER FOR MAIN POWER SUPPLY........................................................................ 3-63
FUSE CAPACITY AND NAME OF CIRCUIT................................................................................... 3-64
DOOR POCKET .......................................................................................................................................3-65
POINT OF CONTACT TO TELEPHONE WHEN ERROR OCCURS............................................ 3-162
MAINTENANCE
GUIDES TO MAINTENANCE...............................................................................................................................4-2
OUTLINES OF SERVICE .....................................................................................................................................4-5
HANDLING OIL, FUEL, COOLANT, AND PERFORMING OIL CLINIC......................................................4-5
OUTLINE OF ELECTRIC SYSTEM............................................................................................................ 4-8
1-20
CONTENTS
WEAR PARTS LIST........................................................................................................................................... 4-10
WEAR PARTS LIST.................................................................................................................................. 4-10
RECOMMENDED FUEL, COOLANT, AND LUBRICANT ................................................................................. 4-12
RECOMMENDED BRANDS, RECOMMENDED QUALITY FOR PRODUCTS OTHER THAN KOMATSU
EVERY 250 HOURS SERVICE....................................................................................................... 4-18
EVERY 500 HOURS SERVICE....................................................................................................... 4-18
EVERY 1000 HOURS SERVICE..................................................................................................... 4-19
EVERY 2000 HOURS SERVICE..................................................................................................... 4-19
EVERY 4000 HOURS SERVICE..................................................................................................... 4-19
EVERY 8000 HOURS SERVICE..................................................................................................... 4-19
SERVICE PROCEDURE .................................................................................................................................... 4-20
INITIAL 250 HOURS SERVICE (ONLY AFTER THE FIRST 250 HOURS) ............................................. 4-20
WHEN REQUIRED................................................................................................................................... 4-20
CHECK BEFORE STARTING .................................................................................................................. 4-39
EVERY 250 HOURS SERVICE................................................................................................................4-40
EVERY 500 HOURS SERVICE................................................................................................................4-48
EVERY 1000 HOURS SERVICE.............................................................................................................. 4-55
EVERY 2000 HOURS SERVICE.............................................................................................................. 4-65
EVERY 4000 HOURS SERVICE.............................................................................................................. 4-72
EVERY 8000 HOURS SERVICE.............................................................................................................. 4-76
GENERAL PRECAUTIONS ................................................................................................................................. 6-2
PRECAUTIONS RELATED TO SAFETY ...................................................................................................6-2
INTRODUCTION OF ATTACHMENTS AND OPTIONS ...................................................................................... 6-3
INTRODUCTION OF ATTACHMENTS AND OPTIONS............................................................................. 6-3
CAP WITH LOCK, HANDLING ............................................................................................................................ 6-5
METHOD OF OPENING AND CLOSING CAP WITH LOCK................................. .... ... ... ... .... ... ... ... ... .... ... . 6-5
PROCEDURE FOR SELECTING RIPPER POINT...............................................................................................6-6
PROCEDURE FOR SELECTING RIPPER POINT..................................................................................... 6-6
HANDLING MACHINES EQUIPPED WITH KOMTRAX......................................................................................6-7
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.
Positions of Safety Pictograms ....................................................................................................................2-42
If Abnormalities are Found...........................................................................................................................2-92
Clothing and Personal Protective Items.......................................................................................................2-92
Fire Extinguisher and First Aid Kit................................................................................................................2-92
Mounting and Dismounting ........................................................................................................................ 2-122
No People on Attachments ........................................................................................................................ 2-122
Prevention of Burns.................................................................................................................................... 2-122
Fire Prevention...........................................................................................................................................2-122
Safety at Worksite...................................................................................................................................... 2-152
Working on Loose Ground........................................................ .......................................... ... ....................2-152
Do not Go Close to High-Voltage Cables...................................................................................................2-152
Ensure Good Visibility................................................................................................................................2-162
Ventilation for Enclosed Areas...................................................................................................................2-162
Checking Signalman's Signals and Signs.................................................................................................. 2-162
Be Careful About Asbestos Dust................................................................................................................2-172
Precautions for Operation ................................................................................................................................. 2-182
Before Starting Engine...............................................................................................................................2-182
Checks Before Starting Engine...........................................................................................................2-182
When Towing...................................................................................................................................... 2-262
Warning Tag .............................................................................................................................................. 2-272
Keep Work Place Clean and Tidy... ... ... ... .... ... .......................................... ... ... ........................................... 2-272
Appoint Leader when Working with Others.................. ... ... ... .... ... ... ... .... ... ................................................. 2-272
Stop Engine Before Carrying Out Inspection and Maintenance ................................................................2-282
Two Workers for Maintenance when Engine is Running ........................................................................... 2-282
Work Under the Machine ........................................................................................................................... 2-302