Komatsu Hydraulic Excavator PC270LC-6LE, PC270LC-7L, PC270LL-7L Repair Service Manual + Operation Maintenance Manual
Complete service repair manual with Electrical Wiring Diagrams for Komatsu Hydraulic Excavator PC270LC-6LE, PC270LC-7L, PC270LL-7L, with all the technical information to maintain, diagnose, repair, rebuild like professional mechanics.
Komatsu Hydraulic Excavator PC270LC-6LE, PC270LC-7L, PC270LL-7L workshop service repair manual includes:
* Numbered table of contents easy to use so that you can find the information you need fast.
* Detailed sub-steps expand on repair procedure information
* Numbered instructions guide you through every repair procedure step by step.
* Troubleshooting and electrical service procedures are combined with detailed wiring diagrams for ease of use.
* Notes, cautions and warnings throughout each chapter pinpoint critical information.
* Bold figure number help you quickly match illustrations with instructions.
* Detailed illustrations, drawings and photos guide you through every procedure.
* Enlarged inset helps you identify and examine parts in detail.
PRODUCT DETAILS:
Total Pages: 2,884 pages
File Format: PDF (Internal Links, Bookmarked, Table of Contents, Searchable, Printable, high quality)
Language: English
CEBD003001 - Hydraulic Excavator PC270LC-6LE Shop Manual.pdf
CEBM005905 - Hydraulic Excavator PC270LC-7L Shop Manual.pdf
CEBM014600 - Logging Excavator GALEO PC270LL-7L Shop Manual.pdf
CEAM008702 - Hydraulic Excavator PC270LC-7L Operation & Maintenance Manual.pdf
CEAM014700 - Hydraulic Excavator GALEO PC270LC-7L Operation & Maintenance Manual.pdf
MAIN SECTIONS
MAIN MENU...0
COVER...1
CONTENTS...2
FOREWORD...2
SAFETY...5
SAFETY NOTICE...5
IMPORTANT SAFETY NOTICE...5
GENERAL PRECAUTIONS...5
PREPARATIONS FOR WORK...5
PRECAUTIONS DURING WORK...5
GENERAL...7
HOW TO READ THE SHOP MANUAL...8
VOLUMES...8
DISTRIBUTION AND UPDATING...8
FILING METHOD...8
REVISED EDITION MARK...8
REVISIONS...8
SYMBOLS...8
HOISTING INSTRUCTIONS...9
HOISTING...9
WIRE ROPES...9
COATING MATERIALS...10
STANDARD TIGHTENING TORQUE...12
STANDARD TIGHTENING TORQUE OF BOLTS AND NUTS...12
TIGHTENING TORQUE OF HOSE NUTS...13
TIGHTENING TORQUE OF SPLIT FLANGE BOLTS...13
TIGHTENING TORQUE FOR FLARED NUTS...13
ELECTRIC WIRE CODE...14
CLASSIFICATION BY THICKNESS...14
CLASSIFICATION BY COLOR AND CODE...14
CONVERSION TABLES...15
METHOD OF USING THE CONVERSION TABLE...15
01 GENERAL...21
SPECIFICATION DIMENSION DRAWINGS...22
PC270LL-7L...22
DIMENSIONS...22
WORKING RANGES...24
WEIGHT TABLE...27
FUEL, COOLANT AND LUBRICANTS...29
PC270LL-7L...29
10 STRUCTURE AND FUNCTION...31
ENGINE RELATED PARTS...33
RADIATOR . OIL COOLER . AFTERCOOLER...34
POWER TRAIN...35
FINAL DRIVE...37
SWING CIRCLE...41
TRACK FRAME . RECOIL SPRING...43
IDLER...45
TRACK ROLLER...47
TRACK SHOE...48
TRIPLE GROUSER SHOE...50
HYDRAULIC EQUIPMENT...51
HYDRAULIC TANK...53
HYDRAULIC PUMP...55
HPV95 + 95...55
LS VALVE...60
PC VALVE...60
LS(PC)-EPC VALVE...73
CONTROL VALVE...77
SELF PRESSURE REDUCING VALVE...93
MAIN RELIEF VALVE...96
VARIABLE PRESSURE COMPENSATION VALVE...97
CLSS...99
SWING MOTOR...100
RELIEF VALVE PORTION...103
SWING LOCK...104
REVERSE PREVENTION VALVE...105
CENTER SWIVEL JOINT...108
TRAVEL MOTOR...110
PARKING BRAKE...115
TRAVEL JUNCTION VALVE...121
VALVE CONTROL...123
CONNECTIONS...123
LEVER POSITIONS...124
WORK EQUIPMENT . SWING PPC VALVE...125
TRAVEL PPC VALVE...130
SERVICE VALVE...139
SOLENOID VALVE...142
ATTACHMENT SOLENOID VALVE...143
PPC ACCUMULATOR...145
BOOM HYDRAULIC DRIFT PREVENTION VALVE...146
LIFT CHECK VALVE...149
HYDRAULIC CYLINDERS...150
BOOM CYLINDER...150
ARM CYLINDER...150
BUCKET CYLINDER...150
WORK EQUIPMENT...152
100 HOURS...153
500 HOURS...153
DIMENSION OF ARM...154
DIMENSION OF BUCKET...156
AIR CONDITIONER...158
PIPING...158
ENGINE CONTROL...159
FUEL CONTROL DIAL...161
GOVERNOR MOTOR...162
ENGINE THROTTLE AND PUMP CONTROLLER...164
INPUT AND OUTPUT SIGNALS...165
ELECTRONIC CONTROL SYSTEM...167
MACHINE CONTROL SYSTEM DIAGRAM...168
ENGINE AND PUMP CONTROL FUNCTION...170
SWING CONTROL FUNCTION WITH SOFT SWING...185
MULTI MONITOR SYSTEM...193
MONITOR PANEL...194
MONITOR CONTROL, DISPLAY PORTION MONITOR PORTION...196
MONITOR ITEMS AND DISPLAY...197
MAINTENANCE FUNCTION...206
SENSORS...211
ENGINE OIL LEVEL SENSOR...212
ENGINE OIL PRESSURE SENSOR (FOR LOW PRESSURE)...212
COOLANT TEMPERATURE SENSOR...212
HYDRAULIC OIL TEMPERATURE SENSOR...212
FUEL LEVEL SENSOR...213
AIR CLEANER CLOGGING SENSOR...213
CAB RISER AND RELATED PARTS...214
POWER CONTROL...215
CAB RISER HYDRAULIC SYSTEM...216
20 TESTING, ADJUSTING AND TROUBLESHOOTING...231
STANDARD VALUE TABLES...219
ENGINE...219
CHASSIS...220
TESTING AND ADJUSTING...231
SERVICE TOOLS...233
ENGINE...234
COMPRESSION PRESSURE...234
BLOW-BY PRESSURE...234
OIL PRESSURE...234
RPM...234
SPEED SENSOR...234
EXHAUST GAS COLOR...234
FUEL INJECTION TIMING...234
VALVE CLEARANCE...234
BELT TENSION - AIR COMPRESSOR...235
EMERGENCY ESCAPE FROM ENGINE CONTROL FAILURE...236
SWING CIRCLE BEARINGS...237
TRACK SHOE TENSION...238
SPROCKET...238
OIL PRESSURE...239
WORK EQUIPMENT, SWING AND TRAVEL...239
CONTROL CIRCUIT...243
PUMP PC CONTROL CIRCUIT...244
PUMP LS CONTROL CIRCUIT...247
SOLENOID VALVE OUTPUT PRESSURE...252
TABLE FOR FUNCTIONING CONDITIONS...253
PPC LOCK SOLENOID VALVE...253
SWING AND PARKING BRAKE SOLENOID...253
TRAVEL INTERCONNECTION SOLENOID VALVE...253
ATTACHMENT SOLENOID VALVE OUTPUT...256
PPC VALVE OUTPUT PRESSURE...257
ATTACHMENT PPC VALVE OUTPUT...258
WORK EQUIPMENT AND SWING PPC VALVE...259
WORK EQUIPMENT - HYDRAULIC DRIFT...260
RELEASING PRESSURE IN HYDRAULIC CIRCUIT...262
OIL LEAKAGE...263
AIR BLEEDING OF VARIOUS PARTS...266
SOFT SWING ADJUSTMENTS...268
DIODE INSPECTION PROCEDURES...269
CAB DOOR STOP ADJUSTMENT...271
MULTI-MONITOR PANEL...272
TABLE FOR SERVICE AND FAILURE CODE NUMBERS...279
SERVICE MENU...281
WAY OF SWITCHING TO SERVICE MENU...281
ELECTRICAL SYSTEM TROUBLESHOOTING...297
PM TUNE UP SERVICE...298
TROUBLESHOOTING...303
TROUBLESHOOTING GENERAL...303
POINTS TO REMEMBER WHEN TROUBLESHOOTING...305
SEQUENCE OF EVENTS IN TROUBLESHOOTING...307
POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE...308
CHECKS BEFORE TROUBLESHOOTING...316
CLASSIFICATION AND STEPS FOR TROUBLESHOOTING...317
CLASSIFICATION OF TROUBLESHOOTING...317
STEPS FOR TROUBLESHOOTING...317
FAILURE-LOOKING PHENOMENON AND TROUBLESHOOTING NO...318
CONNECTOR LOCATION CHART...321
CONNECTOR TABLE...321
CONNECTOR LOCATION DIAGRAM...328
ELECTRICAL CIRCUIT DIAGRAMS...333
CONNECTION TABLE FOR CONNECTOR PIN NUMBERS...334
CONNECTOR REPAIR PROCEDURES...357
CONTACT TERMINAL REMOVAL (HD30 TYPE)...357
STRIPPING INSULATION...358
CRIMPING CONTACT TERMINAL (HD30 TYPE)...359
INSERTION OF CONTACT TERMINAL (HD30 TYPE)...360
CONTACT TERMINAL REMOVAL (DT TYPE)...361
STRIPPING INSULATION...362
CRIMPING CONTACT TERMINAL (DT TYPE)...363
INSERTION OF CONTACT TERMINAL (DT TYPE)...364
TROUBLESHOOTING ELECTRICAL SYSTEM (E-MODE)...365
POINTS TO REMEMBER WHEN TROUBLESHOOTING SYSTEM...369
POINTS TO REMEMBER IF ABNORMALITY RETURNS TO NORMAL BY ITSELF...369
USER CODE MEMORY RETENTION FUNCTION...369
INFORMATION CONTAINED IN TESTING PROCEDURES...370
(E101)...372
ABNORMAL DATA IN ERROR HISTORY...372
(E112)...374
SHORT IN WINDSHIELD WIPER MOTOR DRIVE FORWARD ROTATION...374
SHORT IN GUARD WIPER MOTOR DRIVE FORWARD ROTATION...375
(E113)...377
SHORT IN WINDSHIELD WIPER MOTOR DRIVE REVERSE ROTATION...377
SHORT IN GUARD WIPER MOTOR DRIVE REVERSE ROTATION...378
(E114)...380
SHORT OR OPEN IN WINDOW WASHER SYSTEM...380
SHORT OR OPEN IN GUARD WASHER SYSTEM...381
(E115)...383
ABNORMAL WINDSHIELD WIPER MOTION...383
ABNORMAL GUARD WIPER MOTION...384
(E116)...386
ABNORMALITY IN PARKING WIPER ARM...386
ABNORMALITY IN PARKING WIPER ARM (GUARD)...387
(E201)...390
SHORT OR OPEN IN TRAVEL INTERLOCKING SOLENOID...390
(E203)...392
SHORT IN SWING AND PARKING SOLENOID GOVERNOR SYSTEM...392
SHORT IN SWING AND PARKING SOLENOID CONTROLLER SYSTEM (WITH SOFT SWING)...394
(E204)...396
SHORT IN MERGE/DIVIDE SOLENOID...396
(E205)...398
SHORT IN 2 STAGE RELIEF SOLENOID...398
(E206)...400
SHORT IN TRAVEL SPEED SHIFT SOLENOID...400
(E211)...402
OPEN IN TRAVEL INTERLOCKING SOLENOID...402
(E213)...404
OPEN IN SWING PARKING BRAKE SOLENOID...404
OPEN IN SWING PARKING BRAKE SOLENOID (WITH SOFT SWING)...406
NO CODE...408
SHORT OR OPEN IN SOFT SWING SOLENOID SYSTEM...408
(E214)...412
OPEN OF MERGE/DIVIDE SOLENOID...412
(E215)...414
OPEN IN 2 STAGE RELIEF SOLENOID...414
(E216)...416
OPEN IN TRAVEL SPEED SOLENOID...416
(E217)...418
ABNORMAL INPUT FOR MODEL CODE...418
(E218)...420
OPEN IN S-NET SIGNAL...420
(E222)...422
SHORT IN LS-EPC SOLENOID...422
(E223)...424
OPEN IN LS-EPC SOLENOID SYSTEM...424
(E224)...426
ABNORMAL F-PUMP PRESSURE SENSOR SIGNAL...426
(E225)...428
ABNORMAL R-PUMP PRESSURE SENSOR SIGNAL...428
(E226)...430
ABNORMAL PRESSURE SENSOR POWER SUPPLY...430
(E227)...432
ABNORMAL ENGINE RPM SIGNAL IN GOVERNOR PUMP CONTROLLER...432
(E228)...434
SHORT IN ATTACHMENT RETURN SWITCHING RELAY...434
NO CODE...436
SHORT OR OPEN IN ATTACHMENT SOLENOID SYSTEM...436
NO CODE...440
OPEN IN CAB TILT SYSTEM...440
(E232)...442
SHORT IN PC-EPC SOLENOID...442
(E233)...444
OPEN IN PC-EPC SOLENOID SYSTEM...444
(E238)...446
OPEN IN ATTACHMENT RETURN SWITCH RELAY...446
(E245)...448
SHORT IN ATTACHMENT OIL FLOW RATE EPC SYSTEM...448
(E246)...450
OPEN IN ATTACHMENT OIL FLOW RATE EPC SYSTEM...450
(E256)...452
INCORRECT NON-VOLATILE MEMORY DATA...452
(E306)...454
ABNORMAL GOVERNOR POTENTIOMETER SIGNALS...454
(E308)...456
ABNORMAL FUEL DIAL SIGNALS...456
(E315)...458
SHORT IN BATTERY RELAY SYSTEM...458
(E316)...460
STEP OUT IN GOVERNOR MOTOR...460
(E317)...462
OPEN IN GOVERNOR MOTOR PHASE "A" AND "B"...462
(E318)...464
