Komatsu PC1250-8, PC120LC-8, PC1250SP-8 Hydraulic Excavator Index:

CONTENTS
FOREWORD 1- 1
READ THIS MANUAL 1- 2
SAFETY INFORMATION 1- 4
INTRODUCTION 1- 5
USE OF MACHINE 1- 5
DIRECTIONS OF MACHINE 1- 5
VISIBILITY FROM OPERATOR’S SEAT 1- 6
PRODUCT INFORMATION 1- 7
PRODUCT IDENTIFICATION NUMBER (PIN)/MACHINE SERIAL NO. PLATE 1- 7
ENGINE SERIAL NUMBER PLATE 1- 7
SERVICE METER LOCATION 1- 8
YOUR MACHINE SERIAL NUMBERS AND DISTRIBUTOR 1- 8
SAFETY 2- 1
SAFETY 2- 2
SAFETY LABELS 2- 5
LOCATION OF SAFETY LABELS 2- 6
SAFETY LABELS 2- 7
GENERAL PRECAUTIONS COMMON TO OPERATION AND MAINTENANCE 2- 13
PRECAUTIONS BEFORE STARTING OPERATION 2- 13
PREPARATIONS FOR SAFE OPERATION 2- 13
FIRE PREVENTION 2- 15
PRECAUTIONS WHEN GETTING ON OR OFF MACHINE 2- 16
DO NOT GET CAUGHT IN WORK EQUIPMENT 2- 18
PRECAUTIONS RELATED TO PROTECTIVE STRUCTURES 2- 18
PROTECTION AGAINST FALLING, FLYING, INTRUDING OBJECTS 2- 19
UNAUTHORIZED MODIFICATION 2- 19
PRECAUTIONS RELATED TO ATTACHMENTS AND OPTIONS 2- 20
PRECAUTIONS RELATED TO CAB GLASS 2- 20
PRECAUTIONS WHEN RUNNING ENGINE INSIDE BUILDING 2- 20
PRECAUTIONS FOR OPERATION 2- 21
PRECAUTIONS FOR JOBSITE 2- 21
STARTING ENGINE 2- 23
OPERATION 2- 25
TRANSPORTATION 2- 33
TOWING 2- 34
LIFTING OBJECTS WITH BUCKET 2- 34
PRECAUTIONS FOR MAINTENANCE 2- 35
PRECAUTIONS BEFORE STARTING INSPECTION AND MAINTENANCE 2- 35
PRECAUTIONS FOR INSPECTION AND MAINTENANCE 2- 39
OPERATION 3- 1
MACHINE VIEW ILLUSTRATIONS 3- 2
OVERALL MACHINE VIEW 3- 2
CONTROLS AND GAUGES 3- 3
DETAILED CONTROLS AND GAUGES 3- 5
MONITORING SYSTEM 3- 5
SWITCHES 3- 35
CONTROL LEVERS AND PEDALS 3- 41
EMERGENCY EXIT FROM OPERATOR’S CAB 3- 44
DOOR LOCK 3- 44

CAP WITH LOCK 3- 45
HOT AND COOL BOX 3- 47
MAGAZINE BOX 3- 47
ASHTRAY 3- 47
FIRE EXTINGUISHER 3- 47
AIR CONDITIONER CONTROLS 3- 48
RADIO 3- 62
AUXILIARY ELECTRIC POWER 3- 71
FUSE 3- 72
CIRCUIT BREAKER 3- 73
CONTROLLER 3- 75
TOOL BOX 3- 75
GREASE PUMP 3- 76
EXTERNAL POWER SOURCE TYPE ENGINE PREHEATING HEATER 3- 80
HANDLING PORTABLE COMBUSTION TYPE PREHEATING HEATER 3- 89
BATTERY DISCONNECT SWITCH 3-101
MACHINE OPERATIONS AND CONTROLS 3-102
BEFORE STARTING ENGINE 3-102
STARTING ENGINE 3-126
AFTER STARTING ENGINE 3-130
STOPPING THE ENGINE 3-141
MACHINE OPERATION 3-142
STEERING THE MACHINE 3-146
SWINGING 3-148
WORK EQUIPMENT CONTROLS AND OPERATIONS 3-149
WORKING MODE 3-151
PROHIBITED OPERATIONS 3-152
GENERAL OPERATION INFORMATION 3-157
TRAVELING ON SLOPES 3-159
ESCAPE FROM MUD 3-161
RECOMMENDED APPLICATIONS 3-162
BUCKET REPLACEMENT 3-163
PARKING MACHINE 3-165
MACHINE INSPECTION AFTER DAILY WORK 3-166
LOCKING 3-167
TRANSPORTATION 3-168
TRANSPORTATION PROCEDURE 3-168
PRECAUTIONS FOR TRANSPORTATION 3-168
LIFTING MACHINE 3-168
SHIPPING MACHINE INFORMATION 3-170
TRANSPORTATION POSTURE 3-171
COLD WEATHER OPERATION 3-180
COLD WEATHER OPERATION INFORMATION 3-180
AFTER DAILY WORK COMPLETION 3-183
AFTER COLD WEATHER SEASON 3-183
LONG TERM STORAGE 3-184
BEFORE STORAGE 3-184
DURING STORAGE 3-184
AFTER STORAGE 3-184
STARTING MACHINE AFTER LONG-TERM STORAGE 3-185
1 – 10
.
FOREWORD CONTENTS
TROUBLES AND ACTIONS 3-186
RUNNING OUT OF FUEL 3-186
PHENOMENA THAT ARE NOT FAILURES 3-186
TOWING THE MACHINE 3-187
SEVERE JOB CONDITION 3-187
DISCHARGED BATTERY 3-188
OTHER TROUBLE 3-192
MAINTENANCE 4- 1
MAINTENANCE INFORMATION 4- 2
OUTLINE OF SERVICE 4- 5
HANDLING OIL, FUEL, COOLANT, AND PERFORMING OIL CLINIC 4- 5
ELECTRIC SYSTEM MAINTENANCE 4- 10
WEAR PARTS 4- 11
WEAR PARTS LIST 4- 11
RECOMMENDED FUEL, COOLANT, AND LUBRICANT 4- 12
RECOMMENDED BRANDS, RECOMMENDED QUALITY FOR PRODUCTS OTHER THAN
KOMATSU GENUINE OIL 4- 15
TIGHTENING TORQUE SPECIFICATIONS 4- 16
TIGHTENING TORQUE LIST 4- 16
DEFINED LIFE PARTS 4- 17
MAINTENANCE SCHEDULE 4- 18
MAINTENANCE SCHEDULE CHART 4- 18
MAINTENANCE PROCEDURE 4- 21
INITIAL 100 HOURS MAINTENANCE (ONLY AFTER THE FIRST 100 HOURS) 4- 21
INITIAL 500 HOURS MAINTENANCE (ONLY AFTER THE FIRST 500 HOURS) 4- 21
WHEN REQUIRED 4- 22
CHECK BEFORE STARTING 4- 57
EVERY 10 HOURS MAINTENANCE 4- 58
EVERY 100 HOURS MAINTENANCE 4- 60
EVERY 250 HOURS MAINTENANCE 4- 61
EVERY 500 HOURS MAINTENANCE 4- 65
EVERY 1000 HOURS MAINTENANCE 4- 77
EVERY 2000 HOURS MAINTENANCE 4- 92
EVERY 4000 HOURS MAINTENANCE 4- 98
EVERY 5000 HOURS MAINTENANCE 4-102
EVERY 8000 HOURS MAINTENANCE 4-106
SPECIFICATIONS 5- 1
SPECIFICATIONS 5- 2
ATTACHMENTS AND OPTIONS 6- 1
GENERAL PRECAUTIONS FOR SAFETY 6- 2
PRECAUTIONS WHEN SELECTING 6- 2
READ THE INSTRUCTION MANUAL THOROUGHLY 6- 2
PRECAUTIONS WHEN REMOVING OR INSTALLING 6- 2
PRECAUTIONS WHEN USING 6- 2
ATTACHMENT GUIDE 6- 4
COMBINATIONS OF WORK EQUIPMENT 6- 4
SELECTION OF TRACK SHOES 6- 8
AUTO-GREASING SYSTEM 6- 9
EXPLANATION OF COMPONENTS 6- 10
OPERATION 6- 15

TROUBLESHOOTING 6- 20
MAINTENANCE 6- 22
HANDLING MACHINES EQUIPPED WITH KOMTRAX Plus 6- 29
KOMTRAX Plus INSTALLED, COMMUNICATIONS TERMINAL NOT INSTALLED 6- 29
KOMTRAX Plus AND COMMUNICATIONS TERMINAL INSTALLED 6- 30
LOADING SHOVEL 7- 1
EXPLANATION OF COMPONENTS 7- 2
SWITCHES 7- 2
FUSE 7- 5
OPERATIONS 7- 6
OPERATION OF WORK EQUIPMENT 7- 6
PRECAUTIONS DURING OPERATION 7- 8
LOADING SHOVEL WORK 7- 12
PRECAUTIONS WHEN DISASSEMBLING MACHINE 7- 13
RELEASING PRESSURE 7- 13
TRANSPORTATION 7- 14
MACHINE CONFIGURATION FOR TRANSPORT 7- 14
WEAR PARTS 7- 22
WEAR PARTS LIST 7- 22
MAINTENANCE 7- 23
CHECK BEFORE STARTING 7- 23
EVERY 10 HOURS MAINTENANCE 7- 25
EVERY 5000 HOURS MAINTENANCE 7- 26
SPECIFICATION 7- 28
COMBINATION OF WORK EQUIPMENT 7- 29
COMBINATION OF WORK EQUIPMENT 7- 29