Avance plus WA450-3 Manual

CEAM003800
WA450 3
-
WHEEL LOADER
SERIAL NUMBERS WA450-3MC - A31001 and up
This material is proprietary to Komatsu America International Company and is not to be reproduced, used, or disclosed
except in accordance with written authorization from Komatsu America International Company.
It is our policy to improve our products whenever it is possible and practical to do so. We reserve the right to make
changes or add improvements at any time without incurring any obligation to install such changes on products sold
previously.
Due to this continuous program of research and development, periodic revisions may be made to this publication. It is
recommended that customers contact their distributor for information on the latest revision.
FEB 1999 Copyright 1999 Komatsu America International Company

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VARIOUS PRODUCT PARTS & SERVICE PUBLICATIONS ARE AVAILABLE TO ALL KOMATSU CONSTRUCTION
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MANUALS ARE ALSO AVAILABLE AS WELL AS SELECTED OPERATION & SERVICE MANUALS IN FOREIGN
LANGUAGES.
THE PUBLICATIONS LISTED BELOW ARE AVAILABLE FOR THIS PARTICULAR MACHINE(S).
DESCRIPTION FORM NUMBER
PARTS BOOK - PAPER:
Chassis and Engine .....................................................BEPB005600
PARTS BOOK - MICROFICHE:
Chassis and Engine .....................................................BEPM005600
OPERATION AND MAINTENANCE MANUAL:
Chassis and Engine .....................................................CEAM003700
SHOP MANUAL:
Chassis ..............................................................CEBM003500
Engine ...............................................................CEBM000601
STANDARD MAN-HOUR GUIDE:
Chassis ..............................................................
Engine ...............................................................N/A
SAFETY MANUAL ..........................................................WLT70-1
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WA450-3MC 0-1
INTRODUCTION

INTRODUCTION
WA450-3MC0-2
1. FOREWORD
This manual describes the procedures for the operation, handling,lubrication, maintenance, checking, and adjustment.
The manual will help the operator and maintenance personnel realize peak performance through effective, economical
and safe machine operation and maintenance.
Keep this manual handy and have all personnel read it periodically. If this manual becomes lost or illegible, request a
replacement manual from your local distributor.
If you sell the machine, give this manual to the new owner.
Because of continual design changes in this machine, the changes may not be reflected in this manual. Consult your
local distributor or Komatsu America International Company for the latest available information in this manual.
WARNING
Improper operation and maintenance of this machine can be hazardous and could result in serious injury
or death.
Operators and maintenance personnel must read this manual thoroughly before operating or maintaining
this machine.
This manual should be kept near the machine for reference and periodically reviewed by all personnel who
come across it.
Some actions involved in the operation and maintenance can cause a serious accident, if they are not
performed in the manner described in this manual.
The procedures and precautions given in this manual apply only to intended uses of the machine. If you
use your machine for any unintended uses not specifically prohibited, you must be sure that it is safe for
you and others. In no event should you or others engage in prohibited uses or actions described in this
manual.
Komatsu America International Company 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 features and
specifications that are needed 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 your local distributor or
Komatsu America International Company before operating the machine.
The description of safety is given in SAFETY INFORMATION on page 0-3 and in SAFETY from page 1-1.

INTRODUCTION
WA450-3MC 0-3
2. SAFETY INFORMATION
Most accidents are caused by the failure to follow fundamental safety rules for the operation and maintenance of the
machines. To avoid accidents, read andfollow all precautions and warnings in this manual and on the machine before
performing maintenance and machine operations.
To identify safety messages in this manual and on machine product graphics, the following signal words are used.
DANGER! - This word is used on safety messages and product graphics where thereis a high
probability of serious injury or death if the hazard is not avoided. These safety
messages and product graphics usually describe precautions that must be taken
to avoid the hazard. Failure to avoid this hazard may also result in serious damage
to the machine.
WARNING! - This word is used on safety messages and product graphics where there is a
potentially dangerous situation, which could result in serious injury or death if
the hazard is not avoided. These safety messages and product graphics usually
describe precautions that must be taken to avoid thehazard. Failure to avoid this
hazard may also result in serious damage to the machine.
CAUTION! - This word is used on safety messages and product graphics for hazards, which
could result in minor or moderate injury if the hazard is not avoided. These safety
messages and product graphics might also use this word for hazards where the
only result could be damage to the machine.
NOTE - This word is used for precautions that must be taken to avoid actions, which could
shorten the life of the machine.
Safety precautions are described in SAFETY, which begins on page 1-1.
Komatsu America International Company cannot predict every circumstance that mightinvolve a potential hazard in
operation and maintenance. Therefore, the safety message in this manual and on the machine may not include all
possiblesafety precautions. If any procedures or actions not specifically recommended or allowed in this manual are
used, you must be sure that you and others can do such procedures and actions safely and without damaging the
machine. If you are unsure about the safety of some procedures, contact your local distributor or Komatsu America
International Company.

INTRODUCTION
WA450-3MC0-4
3. INTRODUCTION
3.1 INTENDED USE
This WHEEL LOADER is designed to be used mainly for the following work:
Digging
Leveling
Pushing
Loading
For details of the operating procedures, see 12.10 WORK POSSIBLE USING WHEEL LOADER on page 2-64.
3.2 FEATURES
Curved glass and improved sealing for reduced noise, low vibration cab, viscous mount.
Console and steering post with unencumbered foot area providing the same comfortable feeling as in an
automobile.
Fully hydraulic brake system, which does not require draining water or concerns of rust and freezing.
Maintenance-free, wet-type disc parking brake (acts also as emergency brake).
Large capacity pump and 2-stage hydraulic system for reduced cycle time and increased productivity.
One-touch panel control and air conditioner with new refrigerant installed.
Full fender system installed to help prevent mud or water from splashing on or around the machine.
3.3 BREAKING IN A NEW MACHINE
Your machine has been thoroughly adjusted and tested before shipment. However, operating the machine under severe
conditions at the beginning can adversely affect the performance and shorten the machine life. Be sure to break in the
machine for the initial 100 hours (as indicated by the service meter).
During breaking in:
After starting, let the engine idle for 5 minutes to allow proper engine warm up prior to actual operation.
Avoid operation with heavy loads or at high speeds.
Avoid sudden starts or acceleration, unnecessarily abrupt stops and sharp steering except in cases of
emergency.
The precautions given in this manual for operating, maintenance, and safety procedures are only those that apply when
this product is used for the specified purpose. If the machine is used for a purpose that is not listed in this manual,
Komatsu America International Company cannot bear any responsibility for safety. All consideration of safety in such
operations is the responsibility of the user.
Operations that are prohibited in this manual must never be carried out under any circumstance.

INTRODUCTION
WA450-3MC 0-5
4. LOCATION OF PLATES, TABLE TO ENTER SERIAL NO. AND
DISTRIBUTOR
4.1 MACHINE SERIAL NO. PLATE POSITION
4.1.1 POSITION OF PLATE (A)
On the center right of the front frame.
4.1.2 POSITION OF STAMP (B)
This is stamped on the center of the front frame on the right hand
side of the machine.
4.2 ENGINE SERIAL NO. PLATE POSITION
As viewed from the left-hand side of the machine.
4.3 TABLE TO ENTERSERIAL NO. DISTRIBUTOR
Machine P.I.N.:
Engine serial No.:
Distributor name:
Address: Phone:
Service personnel for your machine:

INTRODUCTION
WA450-3MC0-6
REMARKS

INTRODUCTION
WA450-3MC 0-7
5. TABLE OF CONTENTS
1. FOREWORD ............................................................................0-2
2. SAFETY INFORMATION ...................................................................0-3
3. INTRODUCTION .........................................................................0-4
3.1 INTENDED USE ......................................................................0-4
3.2 FEATURES ..........................................................................0-4
3.3 BREAKING IN A NEW MACHINE .........................................................0-4
4. LOCATION OF PLATES, TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR ......................0-5
4.1 MACHINE SERIAL NO. PLATE POSITION .................................................0-5
4.1.1 POSITION OF PLATE (A) ........................................................0-5
4.1.2 POSITION OF STAMP (B)........................................................0-5
4.2 ENGINE SERIAL NO. PLATE POSITION...................................................0-5
4.3 TABLE TO ENTER SERIAL NO. DISTRIBUTOR ............................................0-5
5. TABLE OF CONTENTS ....................................................................0-7
6. GENERAL PRECAUTIONS ................................................................0-16
7. PRECAUTIONS DURING OPERATION ......................................................0-22
7.1 BEFORE STARTING ENGINE ..........................................................0-22
7.2 OPERATING MACHINE ...............................................................0-23
7.3 TRANSPORTATION ...............................................................0-32
7.4 BATTERY .......................................................................0-33
7.5 TOWING ........................................................................0-35
8. PRECAUTIONS FOR MAINTENANCE .......................................................0-36
8.1 BEFORE CARRYING OUT MAINTENANCE ...........................................0-36
8.2 DURING MAINTENANCE............................................................0-41
8.3 TIRES ..........................................................................0-46
10. GENERAL VIEW .........................................................................2-2
10.1 GENERAL VIEW OF MACHINE.......................................................2-2
10.2 GENERAL VIEW OF CONTROLS AND GAUGES ........................................2-3
11. COMPONENT EXPLANATION ..............................................................2-4
11.1 MACHINE MONITOR ...............................................................2-4
11.1.1 WARNING DISPLAYS ...........................................................2-6
11.2 SWITCHES ......................................................................2-15
11.3 CONTROL LEVERS, PEDALS ......................................................2-23
11.4 STEERING COLUMN TILT LEVER ...................................................2-28
11.5 CAP WITH LOCK .................................................................2-29
11.5.1 METHOD OF OPENING AND CLOSING THE CAP WITH LOCK .......................2-29
11.6 SAFETY BAR ....................................................................2-30
11.7 TOWING PIN.....................................................................2-30
11.8 GREASE PUMP ..................................................................2-31
11.9 BACKUP ALARM .................................................................2-31
11.10 FUSE ...........................................................................2-32
11.10.1 FUSE CAPACITY AND CIRCUIT NAME ...........................................2-32
11.11 SLOW-BLOW FUSE ...............................................................2-33
11.12 MANUAL STORAGE PLACE ........................................................2-34
11.13 ELECTRIC POWER (with ROPS CAB) ................................................2-34
12. OPERATION ............................................................................2-35
12.1 CHECKS BEFORE STARTING ......................................................2-35

INTRODUCTION
WA450-3MC0-8
12.1.1 WALK AROUND CHECK .......................................................2-35
12.1.2 CHECK BEFORE STARTING ....................................................2-39
12.1.3 ADJUSTMENT BEFORE OPERATION ............................................2-45
12.1.4 OPERATIONS AND CHECKS BEFORE STARTING ENGINE ..........................2-48
12.2 STARTING THE ENGINE ...........................................................2-0
12.2.1 COLD WEATHER STARTING ...................................................2-51
12.3 OPERATIONS AND CHECKS AFTER STARTING THE ENGINE ..........................2-52
12.4 MOVING THE MACHINE ...........................................................2-54
12.5 CHANGING GEAR SPEED .........................................................2-56
12.6 CHANGING DIRECTION ...........................................................2-57
12.7 TURNING .......................................................................2-58
12.8 STOPPING THE MACHINE .........................................................2-59
12.9 WORK EQUIPMENT OPERATION
................................................................................2-60
12.9.1 STANDARD WORK EQUIPMENT CONTROLS .....................................2-60
12.9.2 MONO-LEVER WORK EQUIPMENT CONTROLS ...................................2-61
12.10 WORK POSSIBLE USING A WHEEL LOADER .........................................2-63
12.10.1 DIGGING OPERATIONS ........................................................2-63
12.10.2 LEVELING OPERATIONS .......................................................2-66
12.10.3 PUSHING OPERATION ........................................................2-66
12.10.4 LOAD AND CARRY OPERATIONS ...............................................2-66
12.10.5 LOADING OPERATIONS .......................................................2-67
12.11 PRECAUTION FOR OPERATION ....................................................2-67
12.11.1 PERMISSIBLE WATER DEPTH ..................................................2-67
12.11.2 IF WHEEL BRAKES DO NOT WORK .............................................2-68
12.11.3 PRECAUTIONS WHEN DRIVING UP OR DOWN SLOPES ............................2-68
12.11.4 PRECAUTIONS WHEN DRIVING THE MACHINE ...................................2-69
12.12 ADJUSTING THE WORK EQUIPMENT POSTURE ......................................2-70
12.12.1 ADJUSTING THE BOOM KICKOUT ...............................................2-70
12.12.2 ADJUSTING THE BUCKET POSITIONER ..........................................2-71
12.12.3 BUCKET LEVEL INDICATOR ....................................................2-71
12.13 PARKING THE MACHINE ..........................................................2-72
12.14 CHECKS AFTER COMPLETION OF OPERATION ......................................2-73
12.15 STOPPING THE ENGINE ..........................................................2-73
12.16 CHECK AFTER STOPPING THE ENGINE .............................................2-74
12.17 LOCKING .......................................................................2-74
12.18 HANDLING THE TIRES ............................................................2-75
12.18.1 PRECAUTIONS WHEN HANDLING TIRES .........................................2-75
12.18.2 TIRE PRESSURE .............................................................2-75
13. TRANSPORTATION .....................................................................2-77
13.1 LOADING, UNLOADING WORK .....................................................2-77
13.2 LOADING PRECAUTIONS .........................................................2-78
13.3 LIFTING THE MACHINE ...........................................................2-78
13.3.1 POSITION FOR STICKING THE LIFTING POSITION MARK...........................2-79
13.3.2 WEIGHT TABLE ..............................................................2-79
13.3.3 LIFTING PROCEDURE .........................................................2-80
13.4 TRANSPORTATION PRECAUTIONS .................................................2-81
14. COLD WEATHER OPERATION ............................................................2-82
14.1 LOW TEMPERATURE PRECAUTIONS ...............................................2-82
14.1.1 FUEL AND LUBRICANTS .......................................................2-82
14.1.2 COOLANT ...................................................................2-82
14.1.3 BATTERY ....................................................................2-82
14.2 PRECAUTIONS AFTER WORK COMPLETION .........................................2-83
14.3 AFTER COLD WEATHER .........................................................2-83
15. LONG-TERM STORAGE ..................................................................2-83
15.1 BEFORE STORAGE ...............................................................2-83

INTRODUCTION
WA450-3MC 0-9
15.2 DURING STORAGE ...............................................................2-83
15.3 AFTER STORAGE ................................................................2-83
16. TROUBLESHOOTING ....................................................................2-84
16.1 WHEN THE MACHINE RUNS OUT OF FUEL ..........................................2-84
16.2 TOWING THE MACHINE ...........................................................2-84
16.2.1 WHEN ENGINE CAN BE USED ..................................................2-85
16.2.2 WHEN ENGINE CANNOT BE USED ..............................................2-85
16.2.3 RELEASING THE PARKING BRAKE ..............................................2-86
16.2.4 EMERGENCY TRAVEL OPERATION .............................................2-88
16.3 IF BATTERY IS DISCHARGED ......................................................2-89
16.3.1 BATTERY INSTALLATION AND REMOVAL ........................................2-89
16.3.2 PRECAUTION FOR CHARGING THE BATTERY ....................................2-90
16.3.3 STARTING THE ENGINE WITH BOOSTER CABLE..................................2-91
16.4 OTHER TROUBLE ................................................................2-93
16.4.1 ELECTRICAL SYSTEM ........................................................2-93
16.4.2 CHASSIS ....................................................................2-94
16.4.3 ENGINE .....................................................................2-97
17. GUIDES TO MAINTENANCE ...............................................................3-2
18. OUTLINES OF SERVICE ...................................................................3-4
18.1 OUTLINE OF OIL, FUEL, COOLANT ..................................................3-4
18.1.1 OIL ..........................................................................3-4
18.1.2 FUEL .........................................................................3-5
18.1.3 COOLANT ....................................................................3-5
18.1.4 GREASE ......................................................................3-5
18.1.5 STORING OIL AND FUEL ........................................................3-6
18.1.6 FILTERS ......................................................................3-6
18.2 FUEL INJECTION PUMP ............................................................3-6
18.3 OUTLINE OF ELECTRIC SYSTEM ....................................................3-6
18.4 OUTLINE OF HYDRAULIC SYSTEM ..................................................3-7
19. WEAR PARTS LIST .......................................................................3-8
20. FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE ..................3-9
20.1 PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS ...........................3-9
20.2 ENGINE OIL SPECIFICATIONS .....................................................3-10
20.2.1 NORMAL OPERATION .........................................................3-10
20.2.2 ARCTIC OPERATION ..........................................................3-10
20.3 TRANSMISSION, TORQUE CONVERTER, TRANSFER CASE AND OIL COOLER, SERVICE BRAKES
AND HYDRAULIC SYSTEM OIL SPECIFICATIONS .....................................3-11
20.4 DRIVE AXLE OIL SPECIFICATIONS..................................................3-11
20.5 DIESEL FUEL SPECIFICATIONS ....................................................3-11
20.6 COOLANT SPECIFICATIONS .......................................................3-12
20.6.1 GENERAL ...................................................................3-12
20.6.2 WATER ......................................................................3-12
20.6.3 ANTIFREEZE .................................................................3-12
20.6.4 SUPPLEMENTAL COOLANT ADDITIVES ..........................................3-14
21. STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS .................................3-19
21.1 INTRODUCTION OF NECESSARY TOOLS ............................................3-19
21.2 TORQUE LIST ...................................................................3-20
22. PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS .....................................3-21
23. MAINTENANCE SCHEDULE CHART .......................................................3-25
23.1 SCHEDULED MAINTENANCE CHART ...............................................3-25

INTRODUCTION
WA450-3MC0-10
24. INITIAL 250 HOURS SERVICE .............................................................3-28
24.1 INITIAL 250 HOURS SERVICE ......................................................3-28
24.2 WHEN REQUIRED ................................................................3-28
24.2.1 CHECK, CLEAN, AND REPLACE AIR CLEANER ELEMENT ..........................3-28
24.2.2 CHECK TRANSMISSION OIL LEVEL, ADD OIL .....................................3-31
24.2.3 CHECK AXLE OIL LEVEL, ADD OIL ..............................................3-32
24.2.4 CLEAN THE AXLE CASE BREATHER ............................................3-33
24.2.5 CLEAN THE RADIATOR FINS ...................................................3-33
24.2.6 REPLACE THE BOLT-ON CUTTING EDGES .......................................3-34
24.2.7 REPLACE BUCKET TEETH .....................................................3-35
24.2.8 CHECK AIR CONDITIONER ....................................................3-36
24.2.9 CLEAN THE AIR CONDITIONER CONDENSER ....................................3-38
24.2.10 LUBRICATE WORK EQUIPMENT CONTROL VALVE LINKAGE .......................3-38
24.2.11 REPLACE THE SLOW-BLOW FUSE ..............................................3-38
24.2.12 DRAIN WATER FROM WATER SEPARATOR (if equipped) ...........................3-39
24.2.13 SELECTION AND INSPECTION OF TIRES.........................................3-39
24.3 CHECKS BEFORE STARTING ......................................................3-41
24.4 EVERY 50 HOURS SERVICE .......................................................3-41
24.4.1 DRAIN WATER, SEDIMENT FROM FUEL TANK ....................................3-41
24.5 EVERY 100 HOURS SERVICE ......................................................3-41
24.5.1 CHECK OIL LEVEL IN HYDRAULIC TANK, ADD OIL.................................3-41
24.5.2 CLEAN ELEMENT IN AIR CONDITIONER FRESH AIR FILTER ........................3-42
24.5.3 LUBRICATE REAR AXLE PIVOT PIN (3 PLACES) ...................................3-43
24.6 EVERY 250 HOURS SERVICE ......................................................3-43
24.6.1 CHANGE OIL IN ENGINE OIL PAN, REPLACE ENGINE OIL FILTER CARTRIDGE ........3-43
24.6.2 CHECK TENSION OF FAN BELT, ALTERNATOR BELT, ADJUST .....................3-45
24.6.3 CHECK FOR LOOSE WHEEL HUB NUTS, TIGHTEN ................................3-46
24.6.4 CLEAN ELEMENT IN AIR CONDITIONER RECIRCULATION FILTER ...................3-46
24.6.5 CHECK AIR CONDITIONER COMPRESSOR BELT TENSION, ADJUST .................3-47
24.6.6 CHECK BATTERY ELECTROLYTE LEVEL
............................................................................3-48
24.6.7 LUBRICATING ................................................................3-49
24.7 EVERY 500 HOURS SERVICE ......................................................3-50
24.7.1 REPLACE THE FUEL FILTER CARTRIDGE ........................................3-50
24.7.2 REPLACE TRANSMISSION OIL FILTER ELEMENT..................................3-51
24.7.3 LUBRICATE CENTER DRIVE SHAFT SPLINE ......................................3-52
24.8 EVERY 1,000 HOURS SERVICE.....................................................3-53
24.8.1 CHANGE OIL IN TRANSMISSION, CLEAN STRAINER ...............................3-53
24.8.2 CLEAN TRANSMISSION CASE BREATHER .......................................3-54
24.8.3 LUBRICATE ..................................................................3-55
24.8.4 CHECK TIGHTENING PARTS OF TURBOCHARGER ................................3-57
24.8.5 CHECK PLAY OF TURBOCHARGER ROTOR ......................................3-57
24.8.6 REPLACE CORROSION RESISTOR CARTRIDGE ..................................3-57
24.9 EVERY 2000 HOURS SERVICE .....................................................3-58
24.9.1 CHANGE OIL IN HYDRAULIC TANK ..............................................3-58
24.9.2 REPLACE THE HYDRAULIC TANK BREATHER ELEMENT ...........................3-60
24.9.3 CHANGE AXLE OIL ............................................................3-61
24.9.4 CHECK BRAKE DISC WEAR ....................................................3-62
24.9.5 CHECK ALTERNATOR, STARTING MOTOR .......................................3-62
24.9.6 CHECK ENGINE VALVE CLEARANCE, ADJUST ....................................3-62
24.9.7 CHECK VIBRATION DAMPER ...................................................3-62
24.9.8 REPLACE THE ELEMENT IN AIR CONDITIONER RECIRCULATION AIR FILTER, FRESH AIR
FILTER ......................................................................3-62
24.9.9 CLEAN AND CHECK TURBOCHARGER ..........................................3-62
24.9.10 CLEAN PPC CIRCUIT STRAINER ................................................3-62
24.9.11 CHECK ACCUMULATOR GAS PRESSURE ........................................3-62
24.10 EVERY 4,000 HOURS SERVICE.....................................................3-63
24.10.1 CHECK WATER PUMP .........................................................3-63
25. SPECIFICATIONS ........................................................................4-2

INTRODUCTION
WA450-3MC 0-11
25.1 GENERAL ........................................................................4-2
26. OPTIONAL PARTS AND ATTACHMENTS ....................................................5-2
27. SELECTING BUCKETS AND TIRES .........................................................5-3
28. AIR CONDITIONING ......................................................................5-4
28.1 GENERAL LOCATIONS AND FUNCTION OF CONTROL PANEL ...........................5-0
28.1.1 FAN SWITCH .................................................................5-76
28.1.2 AIR CONDITIONER SWITCH ....................................................5-76
28.1.3 MODE SELECTOR SWITCHES ..................................................5-77
28.1.4 FRESH/RECIRC SELECTOR SWITCH ............................................5-77
28.1.5 TEMPERATURE CONTROL SWITCH .............................................5-77
28.2 METHOD OF OPERATION .........................................................5-78
28.2.1 WHEN NOT USING THE AIR CONDITIONER REGULARLY ...........................5-78
28.3 COOL BOX ......................................................................5-78
29. HANDLING ECSS .......................................................................5-79
29.1 STRUCTURE AND FUNCTION OF ECSS .............................................5-79
29.2 METHOD OF OPERATING ECSS ....................................................5-80
29.3 PRECAUTIONS WHEN OPERATING ECSS SWITCH ...................................5-80
29.4 PRECAUTIONS WHEN HANDLING ACCUMULATOR ...................................5-81
29.5 DISCONNECTING THE ECSS PIPING ................................................5-82
30. OPTION DISPLAY .......................................................................5-83
30.1 EMERGENCY STEERING PILOT LAMP...............................................5-83
30.2 RADIO ..........................................................................5-84
30.2.1 OPERATION .................................................................5-84
30.2.2 SETTING THE CLOCK .........................................................5-86
30.2.3 REMOTE CONTROL UNIT ......................................................5-87
30.2.4 BATTERY REPLACEMENT .....................................................5-87
30.2.5 PRECAUTIONS WHEN USING ..................................................5-87
31. LOAD METER ...........................................................................5-88
31.1 GENERAL LOCATIONS ............................................................5-88
31.2 ADJUSTING LOAD MEASUREMENT POINTS .........................................5-90
31.3 CALIBRATION (ADJUSTING 0 POINT) ...............................................5-91
31.3.1 CHECK BEFORE ADJUSTING ...................................................5-91
31.3.2 ADJUSTING ..................................................................5-92
31.3.3 CHECKING CALIBRATION ......................................................5-92
31.4 MEASURING .....................................................................5-93
31.4.1 MEASURING SUBTOTAL .......................................................5-93
31.4.2 MEASURING REMAIN ..........................................................5-93
31.5 SETTING TARGET AMOUNT IN REMAIN MODE .......................................5-95
31.6 PRINTING DATA
................................................................................5-96
31.6.1 PRINTING SUBTOTAL .........................................................5-96
31.6.2 PRINTING TOTAL .............................................................5-96
31.7 DELETING DATA FROM STORAGE DEVICE ..........................................5-97
31.8 SETTING TIME ON CLOCK .........................................................5-98
31.9 REPLACING PRINTER PAPER ......................................................5-99
31.10 TROUBLESHOOTING FUNCTION ..................................................5-101
31.11 SPARE PARTS
...............................................................................5-101

INTRODUCTION
WA450-3MC0-12

WA450-3MC 1-1

WA450-3MC1-2
SAFETY
WARNING
Read and follow all safety precautions. Failure to do so may
result in serious injury or death.
This safety section also contains precautions for optional
equipment and attachments.

WARNING: Failure to follow these safety
precautions may lead to a serious accident. SAFETY
WA450-3MC 1-3
6. GENERAL PRECAUTIONS
SAFETY RULES
ONLY trained and authorized personnel should be allowed to operate and service this machine.
Follow all safety rules, precautions and instructions when operating or performing maintenance on the
machine.
The owner and/or operator must replace any and all safety and warning product graphics if they are
defaced or removed from the machine.
Think before you act. Careful operators and service personnel are the best insurance against accidents.
Do not rush. Hurrying can lead to accidents. Haste, carelessness, and lack of training are the primary
causes of equipment-related injuries.
The operator must be alert, physically fit and free from the influences of alcohol, drugs, and medications
that might affect his eyesight, hearing, or reactions.
Safety must always be the operator's most important concern. He must refuse to operate when he knows it
is unsafe and consult his supervisor when safety is in doubt.
When working with another operator or a person on work site traffic duty, be sure all personnel understand
all hand signals that are to be used.
SAFETY FEATURES
Be sure all guards and covers are in their proper position. Be sure to replace them after servicing the
machine. Have guards and covers repaired immediately, if damaged.
Proper position
Use safety features such as safety lock lever and seat belt properly.
A seat belt is required by OSHA in almost all applications. DO NOT operate this machine without a seat
belt.
NEVER remove any safety features. ALWAYS keep them in good operating condition.
Safety lock lever
Seat belts
Improper use of safety features could result in serious bodily injury or death.
Be sure the machine has the correct equipment required by local rules and regulations.
UNAUTHORIZED MODIFICATION
Any modification made without authorization from Komatsu America International Company can create
hazards.
Before making a modification, consult your local distributor. Komatsu America International Company will
not be responsible for any injury or damage caused by any unauthorized modification.

SAFETY WARNING: For reasons of safety, always follow
these safety precautions.
WA450-3MC1-4
CLOTHING AND PERSONAL PROTECTIVE ITEMS
Avoid loose clothing and long hair, and jewlery. They can catch on controls or in moving parts and cause
serious injury or death. Also, do not wear oily clothes because they are flammable.
Wear a hard hat, safety glasses, safety shoes, mask or gloves when operating or maintaining the machine.
Always wear safety goggles, hard hat and heavy gloves if your job involves scattering metal chips or minute
materials - this is particularly important when driving pins with a hammer and when cleaning the air filter
element with compressed air.
Also check that there are no other personnel near the machine.
Check that all protective equipment functions properly before using the machine.
ALWAYS APPLY LOCK WHEN LEAVING OPERATOR'S SEAT
When standing up from the operator's seat, always place the safety lock lever securely in the LOCK
position. If you accidentally touch the equipment levers when they are not locked, the machine or work
equipment may move and cause serious injury or damage.
When leaving the machine, lower the work equipment completely to the ground, set the safety lock lever to
the LOCK position, then stop the engine and use the key to lock all the equipment locks. Always take the
key with you.
Work equipment posture
Locks

WARNING: Failure to follow these safety
precautions may lead to a serious accident. SAFETY
WA450-3MC 1-5
MOUNTING AND DISMOUNTING
Climbing on the machine improperly can cause injury. NEVER jump on or off the machine. NEVER get on
or off a moving machine.
When mounting or dismounting, always face the machine and use the handrails and steps.
Do not use the machine's controls or hoses as supports when climbing on or off the machine. Controls and
hoses can move and do not provide solid support. Movement of the controls may cause unexpected
machine movement and injury.
Ensure safety by always maintaining at least three-point contact of hands and feet with the handrails and
steps.
Always remove any oil or mud from the handrails and steps. If they are damaged, repair them and tighten
any loose hardware.
FIRE PREVENTION FOR FUEL AND OIL
Fuel, oil, and antifreeze can be ignited by a flame. Fuel is particularly FLAMMABLE and can be HAZARDOUS.
Keep any flame away from flammable fluids.
Stop the engine and do not smoke when refueling.
Tighten all fuel and oil caps securely.
Refueling and lubricating should be done in well ventilated areas.
Keep oil and fuel in the determined place and do not allow unauthorized persons to enter.