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KOMATSU
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WA380-5H-M
Maintenance Manual
299 pgs10.72 Mb0
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KOMATSU WA380-5H-M, WA380-5 Maintenance Manual

Komatsu has had the operating and maintenance instructions
translated into all the languages of the European Union.
Should you require a copy in another language please inquire
at your local dealer’s
.
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SERIAL NUMBERS WA380H50051 AND UP
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DANGER
.

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 accidents are caused by the failure to follow fundamental safety rules for the operation and maintenance of machines. Acci­dents can be prevented by knowing beforehand conditions that may cause hazard when performing operation 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 Maintenance Manual 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 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.
Storage location for the Operation and Maintenance
Manual:
Pocket (1) at rear of operator's seat
1-2
FOREWORD
WARNING

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.
Indicates an imminently hazardous situation which, if not avoided, will result in death or seri­ous injury. This signal word is to be limited to most extreme situations.
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. It may also be used to alert against unsafe practices.
Example of safety message using signal word
When standing up from the operator's seat, always place the safety lock lever in the LOCK position. If you accidentally touch the levers when they are not locked, this may cause a serious injury or damage.
Other signal words
In addition to the above, the following signal words are used to indicate precautions that should be followed to pro­tect the machine or to give information that is are 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
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 procedures.
Safety labels using pictogram
Safety pictograms use a picture to express 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 hazardous 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.
FOREWORD
Komatsu cannot predict every circumstance that might involve a potential hazard in operation and maintenance. Therefore, the safety messages in this manual and on the machine may not include all possible 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

INTRODUCTION

INTRODUCTION 0.
This Komatsu machine is designed to be used mainly for the following work:
Digging workSmoothingPushing workLoading work
For details of the operating procedure, see “WORKING POSSIBILITY ( 3-97 )“.

DIRECTIONS OF MACHINE 0.

Front
Bucket
RightLeft
Rear
In this manual, the directions of the machine (front, rear, left, right) are determined according to the view from the operator's seat in the direction of travel (front) of the machine.
1-5

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.

On the center right of the front frame.

ENGINE SERIAL NO. PLATE AND POSITION 0.

This name plate is affixed on the oil cooler at the side of engine cylinder block on the left side of machine.
EPA: Environmental Protection Agency, U.S.A.
1-6
FOREWORD
NECESSARY INFORMATION

POSITION OF SERVICE METER 0.

It is at the center bottom of the machine monitor.
For details of the service meter display, see SERVICE METER in EXPLANATION OF COMPONENTS “SERVICE METER ( 3­8 )“.

TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR 0.

Machine serial No.
Engine serial No.
Distributor name
Address
Service Personal
Phone/Fax
1-7

CONTENTS

CONTENTS 0.
FOREWORD
FOREWORD
FOREWORD SAFETY INFORMATION INTRODUCTION
DIRECTIONS OF MACHINE ........................................................................................................................... 1-5
NECESSARY INFORMATION
MACHINE SERIAL NO. PLATE AND POSITION ............................................................................................ 1-6
ENGINE SERIAL NO. PLATE AND POSITION ............................................................................................... 1-6
POSITION OF SERVICE METER.................................................................................................................... 1-7
TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR ................................................................................... 1-7
CONTENTS
......................................................................................................................................................... 1-2
...................................................................................................................................... 1-3
................................................................................................................................................... 1-5
............................................................................................................................. 1-6
.......................................................................................................................................................... 1-8
SAFETY
SAFETY SAFETY LABELS
GENERAL PRECAUTIONS PRECAUTIONS FOR OPERATION
PRECAUTIONS FOR MAINTENANCE PRECAUTIONS WITH TIRES
................................................................................................................................................................ 2-2
................................................................................................................................................. 2-4
LOCATION OF SAFETY LABELS ................................................................................................................... 2-4
SAFETY LABELS............................................................................................................................................. 2-5
................................................................................................................................. 2-6
................................................................................................................... 2-14
STARTING ENGINE ...................................................................................................................................... 2-14
OPERATION .................................................................................................................................................. 2-15
TRANSPORTATION ...................................................................................................................................... 2-21
BATTERY....................................................................................................................................................... 2-22
TOWING ........................................................................................................................................................ 2-24
.............................................................................................................. 2-25
............................................................................................................................ 2-32
OPERATION
GENERAL VIEW
GENERAL VIEW OF MACHINE ...................................................................................................................... 3-2
GENERAL VIEW OF CONTROLS AND GAUGES.......................................................................................... 3-3
EXPLANATION OF COMPONENTS
MACHINE MONITOR....................................................................................................................................... 3-6
TYPES OF WARNING................................................................................................................................ 3-7
CENTRAL WARNING LAMP ...................................................................................................................... 3-7
CHARACTER DISPLAY PORTION ............................................................................................................ 3-8
EMERGENCY STOP ITEM ...................................................................................................................... 3-14
CAUTION ITEMS...................................................................................................................................... 3-16
INSPECTION AND MAINTENANCE ITEM............................................................................................... 3-18
PILOT DISPLAY PORTION ...................................................................................................................... 3-22
METER DISPLAY PORTION.................................................................................................................... 3-26
OTHER FUNCTIONS OF MACHINE MONITOR...................................................................................... 3-28
SWITCHES .................................................................................................................................................... 3-33
CONTROL LEVERS, PEDALS ...................................................................................................................... 3-45
STEERING TILT LOCK LEVER..................................................................................................................... 3-50
CAP WITH LOCK........................................................................................................................................... 3-51
CAP WITH LOCK FOR THE FUEL TANK FILLER PORT........................................................................ 3-51
1-8
.................................................................................................................................................. 3-2
.................................................................................................................... 3-6
FOREWORD
CAP WITH LOCK FOR THE HYDRAULIC TANK FILLER PORT ............................................................ 3-52
SAFETY BAR................................................................................................................................................. 3-52
TOWING PIN ................................................................................................................................................. 3-53
GREASE PUMP............................................................................................................................................. 3-53
CAB DOOR OPEN LOCK.............................................................................................................................. 3-54
CAB WINDOW OPEN LOCK......................................................................................................................... 3-54
BACKUP ALARM........................................................................................................................................... 3-54
FUSE ............................................................................................................................................................. 3-55
FUSE CAPACITY AND NAME OF CIRCUIT............................................................................................ 3-55
SLOW-BLOW FUSE ...................................................................................................................................... 3-56
TAKING OFF POWER................................................................................................................................... 3-57
AIR CONDITIONER....................................................................................................................................... 3-58
GENERAL LOCATIONS AND FUNCTION OF CONTROL PANEL ......................................................... 3-58
METHOD OF OPERATION ...................................................................................................................... 3-61
PRECAUTIONS WHEN USING................................................................................................................ 3-62
CAB WIPER.................................................................................................................................................. 3-63
PREVENTING DAMAGE TO WIPER ARM BRACKET ............................................................................ 3-63
DUST INDICATOR ........................................................................................................................................ 3-63
OPERATION
CHECK BEFORE STARTING ....................................................................................................................... 3-64
WALK-AROUND CHECK ......................................................................................................................... 3-64
CHECK BEFORE STARTING .................................................................................................................. 3-67
ADJUSTMENT BEFORE STARTING............................................................................................................ 3-72
OPERATIONS BEFORE STARTING ............................................................................................................ 3-76
STARTING ENGINE ...................................................................................................................................... 3-78
NORMAL STARTING ............................................................................................................................... 3-78
STARTING IN COLD WEATHER ............................................................................................................. 3-80
CHECKS AFTER STARTING ........................................................................................................................ 3-82
BREAKING IN THE MACHINE................................................................................................................. 3-82
NORMAL OPERATION ............................................................................................................................ 3-82
STOPPING ENGINE...................................................................................................................................... 3-84
CHECKS AFTER STOPPING ENGINE....................................................................................................3-84
MOVING MACHINE OFF (DIRECTIONAL, SPEED), STOPPING ................................................................ 3-85
PREPARATIONS FOR MOVING MACHINE ............................................................................................ 3-85
CHANGING GEAR SPEED ........................................................................................................................... 3-88
CHANGING DIRECTION............................................................................................................................... 3-89
STOPPING MACHINE................................................................................................................................... 3-91
TRANSMISSION CUT-OFF........................................................................................................................... 3-92
TURNING....................................................................................................................................................... 3-94
EMERGENCY STEERING ....................................................................................................................... 3-94
OPERATION OF WORK EQUIPMENT ......................................................................................................... 3-96
WORKING POSSIBILITY .............................................................................................................................. 3-97
DIGGING OPERATIONS.......................................................................................................................... 3-97
LEVELING OPERATIONS...................................................................................................................... 3-100
PUSHING OPERATION ......................................................................................................................... 3-100
LOAD AND CARRY OPERATIONS ....................................................................................................... 3-100
LOADING OPERATIONS ....................................................................................................................... 3-101
PRECAUTIONS FOR OPERATION ............................................................................................................ 3-103
PERMISSIBLE WATER DEPTH............................................................................................................. 3-103
IF WHEEL BRAKE DOES NOT WORK.................................................................................................. 3-103
PRECAUTIONS WHEN DRIVING UP OR DOWN SLOPES.................................................................. 3-103
PRECAUTIONS REGARDING BRAKE FUNCTION .............................................................................. 3-104
ADJUSTING WORK EQUIPMENT .............................................................................................................. 3-105
ADJUSTING BOOM KICKOUT............................................................................................................... 3-105
ADJUSTING BUCKET POSITIONER..................................................................................................... 3-106
BUCKET LEVEL INDICATOR ................................................................................................................ 3-106
PARKING MACHINE ................................................................................................................................... 3-107
CHECKS AFTER WORK ............................................................................................................................. 3-109
LOCKING..................................................................................................................................................... 3-109
....................................................................................................................................................... 3-64
CONTENTS
1-9
CONTENTS
HANDLING THE TIRES............................................................................................................................... 3-110
PRECAUTIONS WHEN HANDLING TIRES........................................................................................... 3-110
TIRE PRESSURE ................................................................................................................................... 3-110
PRECAUTIONS FOR USING LOAD AND CARRY METHOD................................................................ 3-111
TRANSPORTATION
TRANSPORTATION PROCEDURE ............................................................................................................ 3-112
LOADING, UNLOADING WORK WITH TRAILERS ............................................................................... 3-112
LOADING................................................................................................................................................ 3-112
SECURING MACHINE ........................................................................................................................... 3-113
UNLOADING........................................................................................................................................... 3-113
LIFTING MACHINE...................................................................................................................................... 3-114
LOCATION OF LIFTING POSITION MARK ........................................................................................... 3-115
WEIGHT TABLE ..................................................................................................................................... 3-115
LIFTING PROCEDURE .......................................................................................................................... 3-116
COLD WEATHER OPERATION
LOW TEMPERATURE................................................................................................................................. 3-117
FUEL AND LUBRICANTS ...................................................................................................................... 3-117
COOLANT............................................................................................................................................... 3-117
BATTERY ............................................................................................................................................... 3-118
AFTER COMPLETION OF WORK .............................................................................................................. 3-118
AFTER COLD WEATHER ........................................................................................................................... 3-118
WARMING-UP OF STEERING HYDRAULIC .............................................................................................. 3-119
LONG-TERM STORAGE
BEFORE STORAGE.................................................................................................................................... 3-120
DURING STORAGE .................................................................................................................................... 3-120
AFTER STORAGE....................................................................................................................................... 3-120
TROUBLESHOOTING
WHEN MACHINE RUNS OUT OF FUEL..................................................................................................... 3-121
TOWING THE MACHINE............................................................................................................................. 3-122
WHEN ENGINE CAN BE USED............................................................................................................. 3-122
WHEN ENGINE CANNOT BE USED ..................................................................................................... 3-123
RELEASING PARKING BRAKE ............................................................................................................. 3-123
EMERGENCY TRAVEL OPERATION.................................................................................................... 3-125
BATTERY IS DISCHARGED ....................................................................................................................... 3-126
REMOVAL AND INSTALLATION OF BATTERY.................................................................................... 3-126
PRECAUTIONS FOR CHARGING BATTERY ....................................................................................... 3-127
STARTING ENGINE WITH BOOSTER CABLE ..................................................................................... 3-127
OTHER TROUBLE....................................................................................................................................... 3-129
ELECTRICAL SYSTEM .......................................................................................................................... 3-129
CHASSIS ................................................................................................................................................ 3-130
ENGINE .................................................................................................................................................. 3-132
......................................................................................................................................... 3-112
...................................................................................................................... 3-117
.................................................................................................................................. 3-120
...................................................................................................................................... 3-121
FOREWORD
MAINTENANCE
GUIDES TO MAINTENANCE OUTLINES OF SERVICE
OIL, FUEL, COOLANT, AND PERFORMING OIL CLINIC .............................................................................. 4-4
OIL .............................................................................................................................................................. 4-4
FUEL........................................................................................................................................................... 4-4
COOLANT................................................................................................................................................... 4-4
GREASE ..................................................................................................................................................... 4-4
CARRYING OUT KOWA (Komatsu Oil Wear Analysis) ............................................................................. 4-5
STORING OIL AND FUEL .......................................................................................................................... 4-5
FILTERS ..................................................................................................................................................... 4-6
OUTLINE OF ELECTRIC SYSTEM ................................................................................................................. 4-6
WEAR PARTS
WEAR PARTS LIST......................................................................................................................................... 4-7
1-10
...................................................................................................................................................... 4-7
............................................................................................................................... 4-2
..................................................................................................................................... 4-4
FOREWORD
CONTENTS
FUEL, COOLANT AND LUBRICANTS
PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS ................................................................ 4-8
STANDARD TIGHTENING TORQUES PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS MAINTENANCE SCHEDULE CHART
MAINTENANCE SCHEDULE CHART........................................................................................................... 4-16
SERVICE PROCEDURE
INITIAL 250 HOURS SERVICE ..................................................................................................................... 4-18
INITIAL 1000 HOURS SERVICE ................................................................................................................... 4-18
WHEN REQUIRED ........................................................................................................................................ 4-19
CHECK, CLEAN, OR REPLACE AIR CLEANER ELEMENT ................................................................... 4-19
CLEAN INSIDE OF COOLING SYSTEM..................................................................................................4-22
CHECK WATER SEPARATOR ................................................................................................................ 4-25
CHECK TRANSMISSION OIL LEVEL, ADD OIL...................................................................................... 4-26
CHECK AXLE OIL LEVEL, ADD OIL........................................................................................................ 4-27
CLEAN AXLE CASE BREATHER ............................................................................................................ 4-28
CLEAN CONDENSER OF AIR CONDITIONER....................................................................................... 4-28
CHECK WINDOW WASHING FLUID LEVEL, ADD FLUID...................................................................... 4-29
CLEAN RADIATOR FINS AND COOLER FINS ....................................................................................... 4-29
CHECK ELECTRICAL INTAKE AIR HEATER.......................................................................................... 4-32
REPLACE BOLT ON CUTTING EDGE ....................................................................................................4-32
REPLACE BUCKET TEETH..................................................................................................................... 4-33
CHECK AIR CONDITIONER .................................................................................................................... 4-34
REPLACE SLOW-BLOW FUSE ............................................................................................................... 4-35
SELECTION AND INSPECTION OF TIRES ............................................................................................ 4-36
CHECK BEFORE STARTING ....................................................................................................................... 4-38
EVERY 50 HOURS SERVICE ....................................................................................................................... 4-39
DRAIN WATER, SEDIMENT FROM FUEL TANK.................................................................................... 4-39
EVERY 100 HOURS SERVICE ..................................................................................................................... 4-40
CHECK OIL LEVEL IN HYDRAULIC TANK, ADD OIL............................................................................. 4-40
CLEAN ELEMENT IN AIR CONDITIONER FRESH AIR FILTER............................................................. 4-41
EVERY 250 HOURS SERVICE ..................................................................................................................... 4-42
CHECK BATTERY ELECTROLYTE LEVEL............................................................................................. 4-42
CHECK PARKING BRAKE ....................................................................................................................... 4-44
CHECK AIR CONDITIONER COMPRESSOR BELT TENSION, ADJUST .............................................. 4-44
CHECK FOR LOOSE WHEEL HUB NUTS, TIGHTEN ............................................................................ 4-45
CLEAN ELEMENT IN AIR CONDITIONER RECIRCULATION FILTER .................................................. 4-45
EVERY 500 HOURS SERVICE ..................................................................................................................... 4-46
CHANGE OIL IN ENGINE OIL PAN, REPLACE ENGINE OIL FILTER CARTRIDGE ............................. 4-46
REPLACE FUEL FILTER CARTRIDGE ...................................................................................................4-47
EVERY 1000 HOURS SERVICE ................................................................................................................... 4-48
CHANGE TRANSMISSION OIL AND FILTER, CLEAN STRAINER ........................................................ 4-48
CLEAN TRANSMISSION CASE BREATHER .......................................................................................... 4-49
CHECK TIGHTENING PARTS OF TURBOCHARGER............................................................................ 4-49
CHECK PLAY OF TURBOCHARGER ROTOR........................................................................................ 4-49
CHECK ALTERNATOR DRIVING BELT TENSION AND REPLACEMENT............................................. 4-49
REPLACE CORROSION RESISTOR CARTRIDGE ................................................................................ 4-49
EVERY 2000 HOURS SERVICE ................................................................................................................... 4-50
CHANGE OIL IN HYDRAULIC TANK, REPLACE HYDRAULIC FILTER ELEMENT............................... 4-50
REPLACE HYDRAULIC TANK BREATHER ELEMENT .......................................................................... 4-52
CHANGE AXLE OIL.................................................................................................................................. 4-53
REPLACE ELEMENT IN AIR CONDITIONER RECIRCULATION AIR FILTER, FRESH AIR FILTER .... 4-53
CLEAN PPC CIRCUIT STRAINER........................................................................................................... 4-54
CLEAN ENGINE BREATHER ELEMENT................................................................................................. 4-54
CHEK ALTERNATOR, STARTING MOTOR ............................................................................................ 4-54
CHECK ENGINE VALVE CLEARANCE, ADJUST ................................................................................... 4-54
CLEAN AND CHECK TURBOCHARGER ................................................................................................ 4-54
CHECK INJECTOR .................................................................................................................................. 4-55
CHECK ACCUMULATOR GAS PRESSURE ........................................................................................... 4-55
.................................................................................................................................... 4-18
................................................................................................................ 4-8
.............................................................................................................. 4-13
.......................................................................... 4-14
............................................................................................................... 4-16
1-11
CONTENTS
CHECK VIBRATION DAMPER................................................................................................................. 4-55
CHECK BRAKE DISC WEAR................................................................................................................... 4-56
EVERY 4000 HOURS SERVICE ................................................................................................................... 4-57
LUBRICATING.......................................................................................................................................... 4-57
CHECK WATER PUMP ............................................................................................................................ 4-57
CHECK AIR CONDITIONER COMPRESSOR, ADJUST ......................................................................... 4-58
REPLACE INJECTOR NOZZLE TIP ........................................................................................................ 4-58
CHECKING FOR LOOSENESS OF HIGH-PRESSURE CLAMP, HARDENING OF RUBBER ............... 4-58
CHECKING FOR MISSING FUEL SPRAY PREVENTION CAP, HARDENING OF RUBBER................. 4-58
EVERY 8000 HOURS SERVICE ................................................................................................................... 4-59
REPLACE HIGH-PRESSURE PIPING CLAMP........................................................................................ 4-59
REPLACE FUEL SPRAY PREVENTION CAP ......................................................................................... 4-59
FOREWORD
SPECIFICATIONS
SPECIFICATIONS
................................................................................................................................................ 5-2
ATTACHMENTS, OPTIONS
SELECTING BUCKET AND TIRES HANDLING LOAD METER
GENERAL LOCATIONS .................................................................................................................................. 6-3
MACHINE MONITOR WITH LOAD METER............................................................................................... 6-3
SWITCHES ................................................................................................................................................. 6-4
LOAD METER FUNCTIONS............................................................................................................................ 6-5
HANDLING LOAD METER DISPLAY .............................................................................................................. 6-8
SETTING ADDITION MODE ...................................................................................................................... 6-8
SETTING REMAIN MODE........................................................................................................................ 6-10
TOTAL LOAD DATA DISPLAY................................................................................................................. 6-12
STOPPING CALCULATION .....................................................................................................................6-14
CARRYING OUT CALIBRATION (ADJUSTING 0 POINT) WHEN EMPTY ............................................. 6-15
CARRYING OUT CALIBRATION (ADJUSTING 0 POINT) WHEN LOADED........................................... 6-17
SUBTRACTION FUNCTION..................................................................................................................... 6-20
METHOD OF SETTING TIME ON CLOCK.................................................................................................... 6-22
PRINTER OUTPUT........................................................................................................................................ 6-24
PRINTOUT MODE.................................................................................................................................... 6-24
METHOD OF SELECTING PRINTOUT MODE........................................................................................ 6-25
HANDLING TORQUE CONVERTER LOCK-UP
GENERAL LOCATIONS ................................................................................................................................ 6-27
METHOD OF OPERATION ........................................................................................................................... 6-28
WARNING/LIMIT FUNCTIONS FOR TRAVEL SPEED................................................................................. 6-29
HANDLING AUTOMATIC AIR-CONDITIONER
GENERAL LOCATIONS AND FUNCTIONS OF CONTROL PANEL ............................................................ 6-30
METHOD OF OPERATION ........................................................................................................................... 6-34
PRECAUTIONS WHEN USING..................................................................................................................... 6-36
INSPECTION AND MAINTENANCE ............................................................................................................. 6-36
CENTRAL LUBRICATION
OPERATION .................................................................................................................................................. 6-37
JOYSTICK STEERING SYSTEM
COMPONENTS ............................................................................................................................................. 6-38
SHIFT UP, SHIFT DOWN SWITCHES..................................................................................................... 6-38
F-N-R SWITCH ......................................................................................................................................... 6-39
JOYSTICK STEERING LEVER ................................................................................................................ 6-39
JOYSTICK ON/OFF SWITCH................................................................................................................... 6-39
HI/LOW SELECTOR SWITCH.................................................................................................................. 6-39
.................................................................................................................................. 6-3
................................................................................................................................. 6-37
..................................................................................................................... 6-2
................................................................................................ 6-27
................................................................................................. 6-30
....................................................................................................................... 6-38
1-12
FOREWORD
HORN SWITCH ........................................................................................................................................ 6-40
CONSOLE LOCK LEVER......................................................................................................................... 6-40
HEIGHT ADJUSTMENT LOCK LEVER....................................................................................................6-40
ANGLE, FORE/AFT ADJUSTMENT LOCK LEVER ................................................................................. 6-40
STRUCTURE AND FUNCTION..................................................................................................................... 6-40
GETTING IN OR OUT ................................................................................................................................... 6-42
ADJUSTMENT OF JOYSTICK CONSOLE.................................................................................................... 6-42
OPERATION METHOD OF JOYSTICK STEERING SYSTEM ..................................................................... 6-43
EPC WORK EQUIPMENT LEVER
OPERATIONAL FEATURES ......................................................................................................................... 6-45
SWITCHES .................................................................................................................................................... 6-45
SAFETY LOCK LEVER (FOR WORK EQUIPMENT LEVER).................................................................. 6-46
SEMI AUTO DIGGING OPERATIONS .......................................................................................................... 6-46
SEMI AUTO DIGGING OPERATIONS ..................................................................................................... 6-46
METHOD OF OPERATION ...................................................................................................................... 6-47
SELECTING DIGGING PATTERN ........................................................................................................... 6-47
MANUAL OPERATION DURING AUTOMATIC CONTROL..................................................................... 6-47
END OF CONTROL.................................................................................................................................. 6-47
METHOD OF REMOTE POSITIONER.......................................................................................................... 6-47
REMOTE POSITIONER RAISE MODE SWITCH..................................................................................... 6-48
REMOTE POSITIONER LOWER MODE SWITCH .................................................................................. 6-48
REMOTE POSITIONER RAISE/LOWER SET SWITCH .......................................................................... 6-48
METHOD OF OPERATION ...................................................................................................................... 6-49
..................................................................................................................... 6-45
CONTENTS
INDEX
INDEX
................................................................................................................................................................... 7-1
1-13
CONTENTS
FOREWORD
1-14
FOREWORD
CONTENTS
1-15

SAFETY

22
WARNING
Please be sure that you fully understand this manual and the precautions related to safety for the machine. When operat­ing or servicing the machine, always follow these precaus­tions strictly.

SAFETY

SAFETY
SAFETY 0.
SAFETY LABELS.................................................................................................................................................. 2-4
LOCATION OF SAFETY LABELS ................................................................................................................. 2-4
SAFETY LABELS........................................................................................................................................... 2-5
GENERAL PRECAUTION
SAFETY RULES ............................................................................................................................................ 2-6
IF ABNORMALITIES ARE FOUND................................................................................................................ 2-6
CLOTHING AND PERSONAL PROTECTIVE ITEMS ................................................................................... 2-6
FIRE EXTINGUISHER AND FIRST AID KIT ................................................................................................. 2-6
SAFETY FEATURES ..................................................................................................................................... 2-6
KEEP MACHINE CLEAN ............................................................................................................................... 2-7
INSIDE OPERATOR'S COMPARTMENT...................................................................................................... 2-7
ALWAYS APPLY LOCK WHEN LEAVING OPERATOR'S SEAT ................................................................. 2-7
HANDRAILS AND STEPS ............................................................................................................................. 2-8
MOUNTING AND DISMOUNTING ................................................................................................................ 2-8
NO PEOPLE ON ATTACHMENTS................................................................................................................ 2-8
DO NOT GET CAUGHT IN ARTICULATED PORTION................................................................................. 2-9
PREVENTION OF BURNS ............................................................................................................................ 2-9
FIRE PREVENTION..................................................................................................................................... 2-10
ACTION IF FIRE OCCURS.......................................................................................................................... 2-10
WINDOW WASHER LIQUID........................................................................................................................ 2-10
PRECAUTIONS WHEN USING ROPS (Roll Over Protective Structure)..................................................... 2-11
PRECAUTIONS FOR ATTACHMENTS, OPTIONS .................................................................................... 2-11
UNAUTHORIZED MODIFICATION ............................................................................................................. 2-11
SAFETY AT WORKSITE ............................................................................................................................. 2-11
WORKING ON LOOSE GROUND............................................................................................................... 2-12
DO NOT GO CLOSE TO HIGH-VOLTAGE CABLES .................................................................................. 2-12
ENSURE GOOD VISIBILITY ....................................................................................................................... 2-13
CHECKING SIGNALMAN'S SIGNALS AND SIGNS ................................................................................... 2-13
EMERGENCY ESCAPE FROM OPERATOR'S CAB .................................................................................. 2-13
ASBESTOS DUST HAZARD PREVENTION...............................................................................................2-13
PRECAUTIONS FOR OPERATION ................................................................................................................... 2-14
BEFORE STARTING ENGINE .................................................................................................................... 2-14
CHECKS BEFORE STARTING ENGINE ............................................................................................. 2-14
PRECAUTIONS WHEN STARTING..................................................................................................... 2-14
PRECAUTIONS IN COLD AREAS ....................................................................................................... 2-14
OPERATION ................................................................................................................................................ 2-15
CHECKS BEFORE STARTING ENGINE ............................................................................................. 2-15
CHECK WHEN TRAVELING FORWAARD OR REVERE.................................................................... 2-15
PRECAUTIONS WHEN TRAVELING................................................................................................... 2-16
TRAVELING ON SLOPES.................................................................................................................... 2-16
PROHIBITED OPERATIONS ............................................................................................................... 2-17
PRECAUTIONS WHEN OPERATING..................................................................................................2-18
METHODS OF USING BRAKE ............................................................................................................ 2-18
OPERATE CAREFULLY ON SNOW .................................................................................................... 2-19
PARKING MACHINE ............................................................................................................................2-19
TRANSPORTATION .................................................................................................................................... 2-21
LOADING AND UNLOADING............................................................................................................... 2-21
SHIPPING............................................................................................................................................. 2-21
BATTERY..................................................................................................................................................... 2-22
BATTERY HAZARD PREVENTION .....................................................................................................2-22
STARTING WITH BOOSTER CABLES................................................................................................2-22
TOWING ...................................................................................................................................................... 2-24
WHEN TOWING ................................................................................................................................... 2-24
2-2
SAFETY
PRECAUTIONS FOR MAINTENANCE .............................................................................................................. 2-25
WARNING TAG ........................................................................................................................................... 2-25
KEEP WORK PLACE CLEAN AND TIDY.................................................................................................... 2-25
APPOINT LEADER WHEN WORKING WITH OTHERS ............................................................................. 2-25
MAINTENANCE WITH ENGINE RUNNING ................................................................................................ 2-25
TWO WORKERS FOR MAINTENANCE WHEN ENGINE IS RUNNING .................................................... 2-27
INSPECTION AND MAINTENANCE AFTER TURNING E.C.S.S. SWITCH OFF....................................... 2-27
PROPER TOOLS......................................................................................................................................... 2-27
ACCUMULATOR ......................................................................................................................................... 2-28
PERSONNEL............................................................................................................................................... 2-28
ATTACHMENTS .......................................................................................................................................... 2-28
WORK UNDER THE MACHINE .................................................................................................................. 2-29
NOISE.......................................................................................................................................................... 2-29
PRECAUTIONS WHEN USING HAMMER.................................................................................................. 2-29
REPAIR WELDING...................................................................................................................................... 2-29
REMOVING BATTERY TERMINAL............................................................................................................. 2-29
PRECAUTIONS WITH HIGH-PRESSURE OIL ........................................................................................... 2-30
PRECAUTIONS FOR HIGH-PRESSURE FUEL ......................................................................................... 2-30
HANDLING HIGH-PRESSURE HOSES...................................................................................................... 2-30
WASTE MATERIALS................................................................................................................................... 2-30
MAINTENANCE OF AIR CONDITIONER.................................................................................................... 2-30
COMPRESSED AIR .................................................................................................................................... 2-31
PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS .................................................................... 2-31
SAFETY
PRECAUTIONS WITH TIRES ............................................................................................................................ 2-32
HANDLING TIRES....................................................................................................................................... 2-32
PRECAUTIONS WHEN STORING TIRE .................................................................................................... 2-32
2-3

SAFETY LABELS

SAFETY
SAFETY LABELS 0.
The following safety labels are used on this machine. Be sure that you fully understand the correct position and content of these safety labels.
To ensure that the content of these safety labels can be read properly, be sure that they are in the correct place and always keep them clean. When cleaning them, use soap and water. Do not use organic solvents or gasoline. These may cause the safety labels to peel off.
If the safety labels are damaged or lost, or cannot be read, replace them with new parts. For details of the part numbers, see this manual or check on the actual part, and order the new part from your Komatsu distributor.
There are also other labels in addition to the safety labels. Handle these labels in the same way.

LOCATION OF SAFETY LABELS 0.

The rear full fender is available as an option, so (8) indicates machines witch equipped with full fender.
2-4
SAFETY

SAFETY LABELS

SAFETY LABELS 0.
1 Danger of explosion due to pressure accumulator
P/N: 421-93-H1300
2 Do not stand/walk below the attachments
P/N: 421-93-H1380
3 Keep a safe distance to the machine´s articulated
joint P/N: 421-93-H1320
4 Secure articulated joint during transport or when
loading P/N: 421-93-H1330
5 Do not open when engine is running
P/N: 09667-A0880
6 Do not stand to close to the machine
P/N: 421-93-H1360
7 Caution when using jump leads
P/N: 421-93-H1310
8 Do not stand on fender
P/N: 421-93-H1400
9 Caution, hot water/oil
P/N: 421-93-H1280
10 Use Komatsu oil only
P/N: 421-93-H1390
11 Keep a safe distance to the attachments
P/N: 421-93-H1370
12 Instructions prior to operation/maintenance
P/N: 421-93-H1250
13 Precautionary measures before starting work
P/N: 421-93-H1340
2-5

GENERAL PRECAUTIONS

SAFETY
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), report to the person 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 caught up in the machine, 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.
The fire extinguisher is located on the rear cab frame on the
left inside the operator’s cab. Two fasteners are provided on the lower left strut of the cab for fastening the fire extin­guisher in place.
If, in the course of certain operations, there is danger of fire,
fire extinguishers must be at hand. Familiarise with the use of the fire extinguishers.
Inform yourself on measures to be taken in the event of a
fire.
The first-aid kit is located in the compartment under the
driver's seat.
Make sure that you know all telephone numbers of the per-
sons that you need to contact in an emergency.
SAFETY FEATURES 0.
Be sure that all guards and covers are in their proper position. Have guards and covers 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.
2-6
SAFETY
GENERAL PRECAUTIONS
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).
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 cab.
ALWAYS APPLY LOCK WHEN LEAVING OPERATOR'S SEAT 0.
Before standing up from the operator's seat to adjust the
operator's seat, always lower the work equipment, set safety lock lever (1) to the LOCK position and parking brake switch (2) to the ON position, then stop the engine. If you accidentally touch the travel or swing lever when they are not locked. The work equipment may suddenly move and cause serious injury.
Free
Lock
When leaving the machine, always lower the work equip-
ment to the ground, set safety lock lever (1) to the LOCK position and parking brake switch (2) to the ON position, then stop the engine. Lock all places and always take the key with you and leave it in the specified location.
ON
OFF
2-7
GENERAL PRECAUTIONS
SAFETY
HANDRAILS AND STEPS 0.
To prevent personal injury caused by slipping or falling off the machine, always do as follows. Use the handrails and steps marked by arrows in the dia-
gram on the right when getting on or off the machine.
To ensure safety, always face the machine and maintain
three-point contact (both feet and one hand, or both hands and one foot) with the handrails and steps to ensure that you support yourself.
When entering the cab, open the cab door, push the door
securely into catcher (1) to hold in position, then use the handrail on the inside to get on the machine. For details of the method of releasing the door lock, see “CAB DOOR OPEN LOCK (3-54)“.
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.
Never move from the step at the rear of the machine or the
step at the side of the cab to stand on top of the tire.
Before getting on or off the machine, check the handrails and steps, and if there is any oil, grease, or mud on
them, wipe it off immediately. In addition, 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 attachments. There is a hazard of falling and suffering seri­ous injury.
2-8
SAFETY
GENERAL PRECAUTIONS
DO NOT GET CAUGHT IN ARTICULATED PORTION 0.
If the clearance at the articulating portion changes, it will
lead to serious personal injury. Do not allow anyone to come inside the articulation range.
Never enter or put your hand, arm, or any part of your body
in the movable portion between the work equipment and machine or between the cylinder and the work equipment. If someone operates the control levers by mistake, the gap between the work equipment and machine and between the cylinder and work equipment will change, and you, your hand, or arm will be caught and you may suffer serious injury. If you have to go into a movable portion, always take action to secure the work equipment and ensure that it cannot move.
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 when checking or draining the oil, wait for
the oil to cool to a temperature where it is possible to touch the plug by hand before starting the operation. Even when the oil has cooled down, loosen the plug slowly to relieve the internal pressure before removing the plug.
2-9
GENERAL PRECAUTIONS
SAFETY
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 undercovers.
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.
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.
2-10
SAFETY
GENERAL PRECAUTIONS
PRECAUTIONS WHEN USING ROPS (Roll Over Protective Structure) 0.
Install ROPS when working in places where there is danger of falling rocks, such as in mines and quarries, or in places where there is danger of rolling over. 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 the ROPS is welded, or holes are drilled in it, or it is modi-
fied in any other way, its strength may drop. Consult your Komatsu distributor before carrying out any modification.
If ROPS is damaged or deformed by falling objects or by
rolling over, its strength will be reduced and it will not be able to fulfill its function properly. In such cases, always Komatsu contact your distributor for advice of the method of repair. Even if ROPS is installed, always fasten your seat belt prop­erly when operating the machine. If you do not use your fasten your seat belt properly, it cannot display its effect.
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.
UNAUTHORIZED MODIFICATION 0.
Any modification mode without authorization from Komatsu can create hazards. Before making a modification, consult your Komatsu distributor. Komatsu will not be responsible for any injuries, accidents, or product failures resulting from modifications
made without authorization from Komatsu.
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 materials such as thatched 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 action to prevent unauthorized people from approach-
ing the jobsite. When working on public roads, position flagmen and erect barriers to ensure the safety of passing traffic and pedestri­ans.
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.
2-11
GENERAL PRECAUTIONS
SAFETY
Always design and maintain the roads on the jobsite so that
the machines can travel safely.
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, and ask them to take the necessary action.
A0060820
Even going close to high-voltage cables can cause electric
shock, which may cause serious burns or even death. 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,
Nominal Voltage
up to 1000 V 1 m
over 1 kV up to 110 kV 3 m
Safety
Distance
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
over 110 kV up to 220 kV 4 m
over 220 kV up to 380 kV 5 m
with unknown nominal voltage 5 m
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.
2-12
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.
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.
EMERGENCY EXIT FROM OPERATOR'S CAB 0.
Machines equipped with a cab have doors on the left and right sides. If the door on the one side does not open, escape from the door on the other side.
VENTILATION FOR ENCLOSED AREAS 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.
2-13
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