Komatsu PC78UU-8 Hydraulic Excavator Index:

CONTENTS
FOREWORD 1- 1
READ THIS MANUAL 1- 2
SAFETY INFORMATION 1- 3
INTRODUCTION 1- 4
USE OF MACHINE 1- 4
DIRECTIONS OF MACHINE 1- 4
VISIBILITY FROM OPERATOR’S SEAT 1- 4
PROTECTIVE STRUCTURE 1- 4
PRODUCT INFORMATION 1- 5
PRODUCT IDENTIFICATION NUMBER (PIN)/MACHINE SERIAL NO. PLATE 1- 5
ENGINE SERIAL NUMBER PLATE 1- 5
SERVICE METER LOCATION 1- 6
YOUR MACHINE SERIAL NUMBERS AND DISTRIBUTOR 1- 6
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- 15
PRECAUTIONS BEFORE STARTING OPERATION 2- 15
PREPARATIONS FOR SAFE OPERATION 2- 15
FIRE PREVENTION 2- 17
PRECAUTIONS WHEN GETTING ON OR OFF MACHINE 2- 18
DO NOT GET CAUGHT IN WORK EQUIPMENT 2- 20
PRECAUTIONS RELATED TO PROTECTIVE STRUCTURES 2- 20
PROTECTION AGAINST FALLING, FLYING, INTRUDING OBJECTS 2- 21
UNAUTHORIZED MODIFICATION 2- 22
PRECAUTIONS RELATED TO ATTACHMENTS AND OPTIONS 2- 22
PRECAUTIONS RELATED TO CAB GLASS 2- 22
PRECAUTIONS WHEN RUNNING ENGINE INSIDE BUILDING 2- 22
PRECAUTIONS FOR OPERATION 2- 23
PRECAUTIONS FOR JOBSITE 2- 23
STARTING ENGINE 2- 25
OPERATION 2- 27
TRANSPORTATION 2- 35
TOWING 2- 36
LIFTING OBJECTS WITH BUCKET 2- 37
PRECAUTIONS FOR MAINTENANCE 2- 38
PRECAUTIONS BEFORE STARTING INSPECTION AND MAINTENANCE 2- 38
PRECAUTIONS FOR INSPECTION AND MAINTENANCE 2- 42
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- 77
CONTROL LEVERS AND PEDALS 3- 82
WINDSHIELD 3- 86

SLIDING DOOR 3- 92
EMERGENCY ESCAPE HAMMER 3- 93
COVER WITH LOCK 3- 94
ENGINE HOOD 3- 95
MUD COVER 3- 97
BATTERY INSPECTION COVER 3- 98
AIR CONDITIONER CONTROLS 3- 99
RADIO 3-112
FUSE 3-121
FUSIBLE LINK 3-122
AUXILIARY ELECTRIC POWER 3-123
CONTROLLERS 3-124
OPERATION MANUAL STORAGE 3-125
CUP HOLDER 3-125
TOOL BOX 3-125
GREASE PUMP HOLDER 3-125
ASHTRAY 3-126
FIRE EXTINGUISHER 3-126
MACHINE OPERATIONS AND CONTROLS 3-127
BEFORE STARTING ENGINE 3-127
STARTING ENGINE 3-143
AFTER STARTING ENGINE 3-148
STOPPING THE ENGINE 3-160
MACHINE OPERATION 3-161
STEERING THE MACHINE 3-165
SWINGING 3-167
WORK EQUIPMENT CONTROLS AND OPERATIONS 3-168
WORKING MODE 3-170
PROHIBITED OPERATIONS 3-172
GENERAL OPERATION INFORMATION 3-175
TRAVELING ON SLOPES 3-178
ESCAPE FROM MUD 3-180
RECOMMENDED APPLICATIONS 3-181
BUCKET REPLACEMENT AND INVERSION 3-184
PARKING MACHINE 3-187
MACHINE INSPECTION AFTER DAILY WORK 3-189
LOCKING 3-189
ELECTRONIC CONTROL SYSTEM HANDLING 3-190
ROAD LINERS AND RUBBER SHOES 3-200
TRANSPORTATION 3-205
TRANSPORTATION PROCEDURE 3-205
LOADING AND UNLOADING WITH TRAILER 3-206
LIFTING MACHINE 3-212
COLD WEATHER OPERATION 3-214
COLD WEATHER OPERATION INFORMATION 3-214
AFTER DAILY WORK COMPLETION 3-216
AFTER COLD WEATHER SEASON 3-216
LONG TERM STORAGE 3-217
BEFORE STORAGE 3-217
DURING STORAGE 3-217

AFTER STORAGE 3-218
STARTING MACHINE AFTER LONG-TERM STORAGE 3-218
TROUBLES AND ACTIONS 3-219
RUNNING OUT OF FUEL 3-219
PHENOMENA THAT ARE NOT FAILURES 3-219
TOWING THE MACHINE 3-222
SEVERE JOB CONDITION 3-222
DISCHARGED BATTERY 3-223
OTHER TROUBLE 3-228
MAINTENANCE 4- 1
MAINTENANCE INFORMATION 4- 2
OUTLINE OF SERVICE 4- 5
HANDLING OIL, FUEL, COOLANT, AND PERFORMING OIL CLINIC 4- 5
BATTERY TERMINAL 4- 9
ELECTRIC SYSTEM MAINTENANCE 4- 9
WEAR PARTS 4- 10
WEAR PARTS LIST 4- 10
RECOMMENDED FUEL, COOLANT, AND LUBRICANT 4- 11
USE OF FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE 4- 12
RECOMMENDED BRANDS, RECOMMENDED QUALITY FOR PRODUCTS OTHER THAN
KOMATSU GENUINE OIL 4- 13
TIGHTENING TORQUE SPECIFICATIONS 4- 14
TIGHTENING TORQUE LIST 4- 14
DEFINED LIFE PARTS 4- 15
DEFINED LIFE PARTS LIST 4- 15
MAINTENANCE SCHEDULE 4- 16
MAINTENANCE SCHEDULE CHART 4- 16
MAINTENANCE INTERVAL FOR HYDRAULIC BREAKER 4- 18
MAINTENANCE INTERVAL WHEN DIESEL FUEL MIXED WITH BIO-FUEL IS USED 4- 19
MAINTENANCE PROCEDURE 4- 20
WHEN REQUIRED 4- 20
CHECK BEFORE STARTING 4- 54
EVERY 100 HOURS MAINTENANCE 4- 55
EVERY 250 HOURS MAINTENANCE 4- 57
EVERY 500 HOURS MAINTENANCE 4- 64
EVERY 1000 HOURS MAINTENANCE 4- 74
EVERY 2000 HOURS MAINTENANCE 4- 82
EVERY 4000 HOURS MAINTENANCE 4- 86
EVERY 5000 HOURS MAINTENANCE 4- 87
SPECIFICATIONS 5- 1
SPECIFICATIONS 5- 2
ATTACHMENTS AND OPTIONS 6- 1
ATTACHMENTS AND OPTIONS – GENERAL INFORMATION 6- 2
SAFETY FIRST 6- 2
ATTACHMENT INSTALLATION 6- 3
BUCKET WITH HOOK 6- 4
HOOK CONDITION 6- 4
PROHIBITED OPERATIONS 6- 4
MACHINE READY FOR ATTACHMENT 6- 5
LOCATIONS 6- 5