Komatsu PC750-6 PC800-6 Excavator Shop Manual SEBM025305 PDF

Description

Komatsu PC750-6 PC800-6 Excavator Shop Manual SEBM025305 – PDF DOWNLOAD

FILE DETAILS:

Komatsu PC750-6 PC800-6 Excavator Shop Manual SEBM025305 – PDF DOWNLOAD 

Language : English
Pages : 730
Downloadable : Yes
File Type : PDF

TABLE OF CONTENTS:

Komatsu PC750-6 PC800-6 Excavator Shop Manual SEBM025305 – PDF DOWNLOAD 

MACHINE MODEL   SERIAL NUMBER
PC750-6                       11001 and up
PC750SE-6                   11001 and up
PC750LC-6                    11001 and up
PC800-6                         31001 and up
PC800SE-6                    31001 and up

COVER 1
CONTENTS 2
01 GENERAL 28
SPECIFICATION DRAWINGS 29
SPECIFICATIONS 33
WEIGHT TABLE 41
FUEL, COOLANT AND LUBRICANTS 45
10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD 46
PTO 47
PTO LUBRICATION SYSTEM 48
POWER TRAIN 49
SWING MACHINERY 51
SWING CIRCLE 53
FINAL DRIVE 54
TRACK FRAME AND RECOIL SPRING 56
IDLER 58
CARRIER ROLLER 60
TRACK ROLLER 61
TRACK SHOE 62
MOTOR GREASE PUMP 67
HYDRAULIC TANK 68
HYDRAULIC PUMP 69
LINE OIL FILTER 98
PILOT OIL FILTER 98
DRAIN OIL FILTER 99
L H 5-SPOOL CONTROL VALVE 100
R H 4-SPOOL CONTROL VALVE 105
STRAIGHT-TRAVEL VALVE 110
SWING MOTOR 113
CENTER SWIVEL JOINT 118
TRAVEL MOTOR 119
PPC CONTROL RELIEF VALVE 129
SAFETY LOCK VALVE 130
PPC ACCUMULATOR 131
VALVE CONTROL 132
WORK EQUIPMENT, SWING PPC VALVE 133
TRAVEL PPC VALVE 138
SOLENOID VALVE 142
HYDRAULIC CYLINDER 147
WORK EQUIPMENT 155
DIMENSIONS OF WORK EQUIPMENT 163
AIR CONDITIONER 167
ENGINE CONTROL 168
MACHINE CONTROL SYSTEM 173
MONITOR SYSTEM 201
SENSORS 208
20 TESTING AND ADJUSTING 211
STANDARD VALUE TABLE FOR ENGINE 212
STANDARD VALUE TABLE FOR CHASSIS 213
STANDARD VALUE TABLE FOR ELECTRICAL PARTS 222
TOOLS FOR TESTING, ADJUSTING, AND TROUBLESHOOTING 235
MEASURING AIR SUPPLY PRESSURE (BOOST PRESSURE) 237
MEASURING EXHAUST TEMPERATURE 238
MEASURING EXHAUST COLOR 239
ADJUSTING VALVE CLEARANCE 240
MEASURING BLOW-BY PRESSURE 241
MEASURING COMPRESSION PRESSURE 241
MEASURING ENGINE OIL PRESSURE 242
HANDLING EQUIPMENT IN FUEL CIRCUIT 243
RELEASING REMAINING PRESSURE IN FUEL SYSTEM 243
MEASURING FUEL PRESSURE 244
REDUCED CYLINDER MODE OPERATION FOR ENGINE 245
BLEEDING AIR FROM FUEL CIRCUIT 247
CHECKING FOR LEAKAGE IN FUEL CIRCUIT 249
TESTING AND ADJUSTING ALTERNATOR BELT TENSION 250
TESTING AND ADJUSTING FAN BELT TENSION 251
TESTING AND ADJUSTING AIR CONDITIONER COMPRESSOR DRIVE BELT TENSION 252
HANDLING ENGINE CONTROLLER HIGH VOLTAGE CIRCUIT 253
ADJUSTING ENGINE SPEED SENSOR 254
TESTING AND ADJUSTING HYDRAULIC PRESSURE IN WORK EQUIPMENT, SWING, TRAVEL CIRCUIT 255
TESTING AND ADJUSTING CONTROL PUMP CIRCUIT OIL PRESSURE 258
TESTING AND ADJUSTING PISTON PUMP CONTROL PRESSURE 260
MEASURING SERVO PISTON STROKE 266
MEASURING PPC VALVE OUTPUT PRESSURE 267
TESTING SOLENOID VALVE OUTPUT PRESSURE 268
ADJUSTING WORK EQUIPMENT, SWING PPC VALVE 269
TESTING TRAVEL DEVIATION 270
TESTING LOCATIONS CAUSING HYDRAULIC DRIFT OF WORK EQUIPMENT 273
MEASURING OIL LEAKAGE 274
TESTING CLEARANCE OF SWING CIRCLE BEARING 279
TESTING AND ADJUSTING TRACK SHOE TENSION 280
BLEEDING AIR 281
RELEASING REMAINING PRESSURE IN HYDRAULIC CIRCUIT 283
PROCEDURE FOR CHECKING DIODE 284
TROUBLESHOOTING 285
POINTS TO REMEMBER WHEN TROUBLESHOOTING 286
SEQUENCE OF EVENTS IN TROUBLESHOOTING 287
POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE 288
CHECKS BEFORE TROUBLESHOOTING 296
CONNECTOR TYPES AND MOUNTING LOCATIONS 297
CONNECTION TABLE FOR CONNECTOR PIN NUMBERS 304
EXPLANATION OF CONTROL MECHANISM FOR ELECTRICAL SYSTEM 327
DISPLAY METHOD AND SPECIAL FUNCTIONS OF MONITOR PANEL 328
METHOD OF USING JUDGEMENT TABLE 343
METHOD OF USING TROUBLESHOOTING CHARTS 345
DETAILS OF TROUBLESHOOTING AND TROUBLESHOOTING PROCEDURE 346
TROUBLESHOOTING OF COMMUNICATION ABNORMALITY SYSTEM (N MODE) 350
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE 351
ELECTRICAL CIRCUIT DIAGRAM FOR N MODE SYSTEM 353
N-1 [E117, E118 OCCUR AT SAME TIME] MONITOR PANEL COMMUNICATION ABNORMALITY 354
N-2 [E117, E218 OCCUR AT SAME TIME] ENGINE CONTROLLER COMMUNICATION ABNORMALITY 356
N-3 [E118, E955 OCCUR AT SAME TIME] PUMP CONTROLLER COMMUNICATION ABNORMALITY 358
TROUBLESHOOTING OF ENGINE CONTROLLER SYSTEM (E MODE) 360
ACTION TAKEN BY CONTROLLER AND CONDITION OF MACHINE WHEN ERROR CODE IS DISPLAYED 361
JUDGEMENT TABLE FOR ENGINE CONTROLLER AND ENGINE RELATED PARTS 369
ELECTRICAL CIRCUIT DIAGRAM FOR E MODE SYSTEM 371
E-1 [E91b] (ABNORMALITY IN ENGINE SPEED NE SENSOR SYSTEM) IS DISPLAYED 373
E-2 [E91C] (ABNORMALITY IN ENGINE G ROTATION SENSOR SYSTEM) IS DISPLAYED 374
E-3 [E920] (ABNORMALITY IN MODEL SELECTION SYSTEM) IS DISPLAYED 375
E-4 [E922] (ENGINE OVERRUN) IS DISPLAYED 376
E-5 [E924] (DROP IN ENGINE OIL PRESSURE) IS DISPLAYED 377
E-6 [E931] (ABNORMALITY IN FUEL CONTROL DIAL SENSOR SYSTEM) IS DISPLAYED 378
E-7 [E934] (ABNORMALITY IN ENGINE WATER HIGH-TEMPERATURE SENSOR SYSTEM) IS DISPLAYED 379
E-8 [E936] (ABNORMALITY IN ENGINE OIL PRESSURE SWITCH SYSTEM) IS DISPLAYED 380
E-9 [E93C] (ABNORMALITY IN BOOST PRESSURE SENSOR SYSTEM) IS DISPLAYED 382
E-10 [E93d] (ABNORMALITY IN FUEL TEMPERATURE SENSOR SYSTEM) IS DISPLAYED 383
E-11 [E954] (SHORT CIRCUIT IN STARTING SWITCH C SYSTEM) IS DISPLAYED 384
E-12 [E955] (ABNORMALITY IN NETWORK SYSTEM) IS DISPLAYED 384
E-13 [E956] (POWER SOURCE SYSTEM ABNORMALITY 1) IS DISPLAYED 385
E-14 [E957] (POWER SOURCE SYSTEM ABNORMALITY 2) IS DISPLAYED 387
E-15 [E95A] (ABNORMALITY IN FUEL INJECTION AMOUNT ADJUSTMENT SWITCH SIGNAL) IS DISPLAYED 387
E-16 [E96A] (ABNORMALITY IN ENGINE WATER LOW-TEMPERATURE SENSOR SYSTEM) IS DISPLAYED 388
E-17 [E970] (EXCESS CURRENT IN FUEL SUPPLY PUMP PCV1 SYSTEM) IS DISPLAYED 389
E-18 [E971] (EXCESS CURRENT IN FUEL SUPPLY PUMP PCV2 SYSTEM) IS DISPLAYED 390
E-19 [E974] (DISCONNECTION IN FUEL SUPPLY PUMP PCV1 SYSTEM) IS DISPLAYED 391
E-20 [E975] (DISCONNECTION IN FUEL SUPPLY PUMP PCV2 SYSTEM) IS DISPLAYED 392
E-21 [E977] (ABNORMALITY IN COMMON RAIL FUEL PRESSURE SENSOR SYSTEM) IS DISPLAYED 393
E-22 [E979] (COMMON RAIL FUEL HIGH PRESSURE ABNORMALITY 1) IS DISPLAYED, [E97A] (COMMON RAIL FUEL HIGH PRESSURE ABNORMALITY 2) IS DISPLAYED 394
E-23 [E97b] (FUEL SUPPLY PUMP NON-FORCE FEED 1) IS DISPLAYED, [E97C] (FUEL SUPPLY PUMP NON-FORCE FEED 2) IS DISPLAYED 395
E-24 [E97d] (ABNORMALITY IN COMMON RAIL FUEL PRESSURE) IS DISPLAYED 397
E-25 [E980] (DEFECTIVE ENGINE CONTROLLER) IS DISPLAYED 397
E-26 [E981] (DISCONNECTION IN NO 1 FUEL INJECTOR SYSTEM) IS DISPLAYED 398
E-27 [E982] (DISCONNECTION IN NO 2 FUEL INJECTOR SYSTEM) IS DISPLAYED 399
E-28 [E983] (DISCONNECTION IN NO 3 FUEL INJECTOR SYSTEM) IS DISPLAYED 400
E-29 [E984] (DISCONNECTION IN NO 4 FUEL INJECTOR SYSTEM) IS DISPLAYED 401
E-30 [E985] (DISCONNECTION IN NO 5 FUEL INJECTOR SYSTEM) IS DISPLAYED 402
E-31 [E986] (DISCONNECTION IN NO 6 FUEL INJECTOR SYSTEM) IS DISPLAYED 403
E-32 [E98A] (SHORT CIRCUIT IN NO 1, NO 2, NO 3 FUEL INJECTOR SYSTEM) IS DISPLAYED 404
E-33 [E98b] (SHORT CIRCUIT IN NO 3, NO 4, NO 5 FUEL INJECTOR SYSTEM) IS DISPLAYED 408
TROUBLESHOOTING OF PUMP CONTROLLER SYSTEM (C MODE) 412
POINTS TO REMEMBER WHEN TROUBLESHOOTING CONTROLLER SYSTEM 413
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE 414
JUDGEMENT TABLE FOR PUMP CONTROLLER AND HYDRAULIC RELATED PARTS 422
ELECTRICAL CIRCUIT DIAGRAM FOR C MODE SYSTEM 424
C-1 ABNORMALITY IN CONTROLLER POWER SOURCE SYSTEM (CONTROLLER LED IS OFF) 426
C-2 [E232] SHORT CIRCUIT IN PUMP TVC SOLENOID SYSTEM IS DISPLAYED 427
C-3 [E233] DISCONNECTION IN PUMP TVC SOLENOID SYSTEM IS DISPLAYED 429
C-4 [E203] SHORT CIRCUIT IN SWING HOLDING BRAKE SOLENOID SYSTEM IS DISPLAYED 431
C-5 [E213] DISCONNECTION IN SWING HOLDING BRAKE SOLENOID SYSTEM IS DISPLAYED 433
C-6 [E201] SHORT CIRCUIT IN CO CANCEL SOLENOID SYSTEM IS DISPLAYED 435
C-7 [E211] DISCONNECTION IN CO CANCEL SOLENOID SYSTEM IS DISPLAYED 436
C-8 [E202] SHORT CIRCUIT IN STRAIGHT-TRAVEL SOLENOID SYSTEM IS DISPLAYED 437
C-9 [E212] DISCONNECTION IN STRAIGHT-TRAVEL SOLENOID SYSTEM IS DISPLAYED 438
C-10 [E204] SHORT CIRCUIT IN 2-STAGE RELIEF SOLENOID SYSTEM IS DISPLAYED 439
C-11 [E214] DISCONNECTION IN 2-STAGE RELIEF SOLENOID SYSTEM IS DISPLAYED 440
C-12 [E205] SHORT CIRCUIT IN SWING PRIORITY SELECTOR SOLENOID SYSTEM IS DISPLAYED 441
C-13 [E211] DISCONNECTION IN SWING PRIORITY SELECTOR SOLENOID SYSTEM IS DISPLAYED 442
C-14 [E206] SHORT CIRCUIT IN TRAVEL SPEED SOLENOID SYSTEM IS DISPLAYED 443
C-15 [E216] DISCONNECTION IN TRAVEL SPEED SOLENOID SYSTEM IS DISPLAYED 444
C-16 [E217] MODEL SELECTION INPUT ERROR IS DISPLAYED 445
C-17 [E227] ABNORMALITY IN ENGINE SPEED SENSOR SYSTEM IS DISPLAYED 447
C-18 ABNORMALITY IN MACHINE PUSH-UP SOLENOID SYSTEM (NO SERVICE CODE DISPLAYED) 448
C-19 ABNORMALITY IN SHOCKLESS BOOM SOLENOID SYSTEM (NO SERVICE CODE DISPLAYED) 450
C-20 [E207] SHORT CIRCUIT IN FLASH LIGHT RELAY DRIVE SYSTEM IS DISPLAYED 453
C-21 FLASH LIGHT RELAY DOES NOT WORK 454
C-22 [E231] ABNORMALITY (SHORT CIRCUIT) IN POWER SOURCE HOLDING RELAY OUTPUT SYSTEM FOR STEP LIGHT IS DISPLAYED 455
C-23 STEP LIGHT SWITCH DOES NOT WORK 456
C-24 [E302] SHORT CIRCUIT IN STEP LIGHT RELAY DRIVE SYSTEM IS DISPLAYED 457
C-25 [303] DISCONNECTION IN STEP LIGHT RELAY DRIVE SYSTEM IS DISPLAYED 458
C-26 STEP LIGHT DOES NOT LIGHT UP 459
C-27 [E228] ABNORMALITY IN AUTO-DECELERATION OUTPUT SYSTEM IS DISPLAYED 460
TROUBLESHOOTING OF ENGINE THROTTLE & PUMP CONTROLLER (INPUT SIGNAL SYSTEM) (F MODE) 461
ELECTRICAL CIRCUIT DIAGRAM FOR F MODE SYSTEM 462
F-1 [BIT PATTERN 20-(1)] SWING OIL PRESSURE SWITCH DOES NOT LIGHT UP 464
F-2 [BIT PATTERN 20-(2)] R H TRAVEL OIL PRESSURE SWITCH DOES NOT LIGHT UP 465
F-3 [BIT PATTERN 20-(3)] BOOM LOWER OIL PRESSURE SWITCH DOES NOT LIGHT UP 466
F-4 [BIT PATTERN 20-(4)] BOOM RAISE OIL PRESSURE SWITCH DOES NOT LIGHT UP 467
F-5 [BIT PATTERN 20-(5)] ARM IN OIL PRESSURE SWITCH DOES NOT LIGHT UP 468
F-6 [BIT PATTERN 20-(6)] ARM OUT OIL PRESSURE SWITCH DOES NOT LIGHT UP 469
F-7 [BIT PATTERN 21-(1)] BUCKET CURL OIL PRESSURE SWITCH DOES NOT LIGHT UP 470
F-8 [BIT PATTERN 21-(2)] BUCKET DUMP OIL PRESSURE SWITCH DOES NOT LIGHT UP 471
F-9 [BIT PATTERN 20-(5)] L H TRAVEL OIL PRESSURE SWITCH DOES NOT LIGHT UP 472
F-10 [BIT PATTERN 21-(4)] SERVICE OIL PRESSURE SWITCH DOES NOT LIGHT UP 473
F-11 [BIT PATTERN 21-(3)] SWING LOCK SWITCH DOES NOT LIGHT UP 474
F-12 [BIT PATTERN 24-(1)] WHEN STEP LIGHT SWITCH IS ON, IT DOES NOT GO OUT 475
F-13 [BIT PATTERN 24-(2)] WHEN HORN SWITCH IS ON, IT DOES NOT GO OUT 476
TROUBLESHOOTING OF HYDRAULIC, MECHANICAL SYSTEM (H MODE) 477
TABLE OF FAILURE MODES AND CAUSES 478
BEFORE CARRYING OUT TROUBLESHOOTING OF HYDRAULIC SYSTEM (H MODE) 480
H-1 SPEEDS OF ALL WORK EQUIPMENT, SWING, TRAVEL ARE SLOW OR LACK POWER 483
H-2 THERE IS EXCESSIVE DROP IN ENGINE SPEED, OR ENGINE STALLS 484
H-3 NO WORK EQUIPMENT, TRAVEL, SWING MOVE 486
H-4 ABNORMAL NOISE GENERATED (AROUND PUMP) 487
H-5 AUTO-DECELERATION DOES NOT WORK 487
H-6 WORK EQUIPMENT SPEED IS SLOW (BOOM, ARM, BUCKET) 488
H-7 WORK EQUIPMENT (BOOM, ARM, BUCKET) DOES NOT MOVE (BUT TRAVEL AND SWING ARE NORMAL) 490
H-8 EXCESSIVE HYDRAULIC DRIFT 490
H-9 EXCESSIVE TIME LAG 491
H-10 EXCESSIVE SHOCK WHEN BOOM IS STOPPED 491
H-11 DEFECTIVE ACTUATION OF MACHINE PUSH-UP FUNCTION 491
H-12 TRAVEL DEVIATION IS EXCESSIVE DURING COMPOUND OPERATIONS 492
H-13 MACHINE DEVIATES NATURALLY TO ONE SIDE DURING TRAVEL OPERATIONS 493
H-14 DEVIATION IS EXCESSIVE WHEN STARTING 495
H-15 TRAVEL SPEED IS SLOW 496
H-16 TRAVEL SPEED DOES NOT SWITCH 497
H-17 TRAVEL DOES NOT MOVE (ONE SIDE ONLY) 497
H-18 DOES NOT SWING 498
H-19 SWING SPEED IS SLOW OR SWING ACCELERATION IS POOR 500
H-20 SWING SPEED IS SLOW OR SWING ACCELERATION IS POOR DURING COMPOUND OPERATIONS WITH ARM, BUCKET 501
H-21 SWING SPEED IS SLOW OR SWING ACCELERATION IS POOR DURING COMPOUND OPERATIONS WITH BOOM RAISE WHEN SWING PRIORITY IS ON 502
H-22 EXCESSIVE OVERRUN WHEN STOPPING SWING 503
H-23 EXCESSIVE SHOCK WHEN STOPPING SWING 504
H-24 EXCESSIVE ABNORMAL NOISE WHEN STOPPING SWING 505
H-25 EXCESSIVE HYDRAULIC DRIFT OF SWING 506
TROUBLESHOOTING OF MACHINE MONITOR SYSTEM (M MODE) 507
ACTION TAKEN BY MONITOR PANEL WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE 508
ELECTRICAL CIRCUIT DIAGRAM FOR M MODE SYSTEM 510
M-1 [E101] (ABNORMALITY IN ERROR DATA) OR [E102] (ABNORMALITY IN CLOCK DATA) IS DISPLAYED 512
M-2 [E103] (SHORT CIRCUIT IN BUZZER OUTPUT SYSTEM) IS DISPLAYED 513
M-3 [E104] (AIR CLEANER CLOGGING DETECTION) IS DISPLAYED 514
M-4 [E108] (ENGINE WATER TEMPERATURE 105℃) IS DISPLAYED 514
M-5 WHEN STARTING SWITCH IS TURNED ON, NONE OF LAMPS ON MONITOR PANEL LIGHT UP FOR 3 SECONDS 515
M-6 WHEN STARTING SWITCH IS TURNED ON, MONITOR PANEL LAMPS ALL STAY LIGHTED UP AND DO NOT GO OUT 517
M-7 WHEN STARTING SWITCH IS TURNED ON, ITEMS LIGHTED UP ON MONITOR PANEL ARE DIFFERENT FROM ACTUAL MACHINE 517
M-8 WHEN STARTING SWITCH IS TURNED ON (ENGINE STOPPED), BASIC CHECK ITEMS FLASH 518
M-9 PREHEATING IS NOT BEING USED BUT PREHEATING DISPLAY MOTOR LAMP LIGHTS UP 521
M-10 WHEN ENGINE IS STARTED, BASIC CHECK ITEMS FLASH 522
M-11 WHEN STARTING SWITCH IS TURNED ON (ENGINE STOPPED), CAUTION ITEMS AND EMERGENCY STOP ITEMS FLASH 523
M-12 WHEN ENGINE IS STARTED, CAUTION ITEMS AND EMERGENCY STOP ITEMS FLASH 524
M-13 OPERATION OF ALARM BUZZER IS NOT NORMAL 528
M-14 NIGHT LIGHTING ON MONITOR PANEL DOES NOT LIGHT UP 530
M-15 ENGINE WATER TEMPERATURE DISPLAY IS NOT NORMAL 531
M-16 FUEL LEVEL GAUGE DISPLAY IS NOT NORMAL 532
M-17 SWING LOCK SWITCH IS TURNED ON BUT SWING LOCK MONITOR LAMP DOES NOT LIGHT UP 534
M-18 WHEN SWING BRAKE RELEASE SWITCH IS SET TO RELEASE (EMERGENCY), SWING LOCK MONITOR LAMP DOES NOT FLASH 535
M-19 SERVICE METER DOES NOT GIVE NORMAL DISPLAY 536
M-20 DEFECTIVE FUEL LEVEL SENSOR SYSTEM 537
M-21 DEFECTIVE ENGINE OIL LEVEL SENSOR SYSTEM 538
M-22 DEFECTIVE COOLANT LEVEL SENSOR SYSTEM 539
M-23 DEFECTIVE HYDRAULIC OIL LEVEL SENSOR SYSTEM 540
M-24 WIPER IS NOT ACTUATED WHEN WIPER SWITCH IS OPERATED OR WIPER IS ACTUATED WHEN WIPER SWITCH IS NOT OPERATED 541
M-25 WINDOW WASHER IS NOT ACTUATED WHEN WIPER SWITCH IS OPERATED OR WINDOW WASHER IS ACTUATED WHEN SWITCH IS NOT OPERATED 546
M-26 ELECTRIC GREASE GUN DOES NOT WORK (MACHINES EQUIPPED WITH ELECTRIC GREASE GUN) 549
30 DISASSEMBLY AND ASSEMBLY 550
METHOD OF USING MANUAL 552
PRECAUTIONS WHEN CARRYING OUT OPERATION 555
SPECIAL TOOL LIST 557
SKETCHES OF SPECIAL TOOLS 564
FUEL SUPPLY PUMP 567
REMOVAL 567
INSTALLATION 569
FUEL INJECTOR 570
REMOVAL 570
INSTALLATION 572
NOZZLE TIP 574
REMOVAL 574
INSTALLATION 575
ENGINE FRONT SEAL 577
REMOVAL AND INSTALLATION 577
ENGINE REAR SEAL 579
REMOVAL 579
INSTALLATION 580
CYLINDER HEAD ASSEMBLY 584
REMOVAL 584
INSTALLATION 587
AFTERCOOLER CORE 591
REMOVAL, INSTALLATION 591
FAN GUARD, RADIATOR, HYDRAULIC OIL COOLER ASSEMBLY 592
REMOVAL 592
INSTALLATION 594
FUEL COOLER AND AIR CONDITIONER CONDENSER ASSEMBLY 595
REMOVAL, INSTALLATION 595
FUEL TANK ASSEMBLY 596
REMOVAL 596
INSTALLATION 597
ENGINE, PTO AND HYDRAULIC PUMP ASSEMBLY 598
REMOVAL 598
INSTALLATION 602
PTO ASSEMBLY 603
REMOVAL 603
INSTALLATION 604
PTO ASSEMBLY 605
DISASSEMBLY 605
ASSEMBLY 606
FINAL DRIVE ASSEMBLY 609
DISASSEMBLY 609
ASSEMBLY 614
REVOLVING FRAME ASSEMBLY 622
REMOVAL 622
INSTALLATION 623
SWING MACHINERY ASSEMBLY 624
REMOVAL, INSTALLATION 624
SWING MACHINERY ASSEMBLY 625
DISASSEMBLY 625
ASSEMBLY 629
SWING CIRCLE ASSEMBLY 634
REMOVAL, INSTALLATION 634
TRACK SHOE ASSEMBLY 635
REMOVAL 635
INSTALLATION 636
ONE LINK IN FIELD 637
DISASSEMBLY 637
ASSEMBLY 639
IDLER ASSEMBLY 641
REMOVAL, INSTALLATION 641
IDLER ASSEMBLY 642
DISASSEMBLY 642
ASSEMBLY 644
IDLER ADJUSTMENT CYLINDER ASSEMBLY 646
DISASSEMBLY, ASSEMBLY 646
RECOIL SPRING ASSEMBLY 647
REMOVAL, INSTALLATION 647
RECOIL SPRING ASSEMBLY 649
DISASSEMBLY 649
ASSEMBLY 650
CARRIER ROLLER ASSEMBLY 651
REMOVAL, INSTALLATION 651
CARRIER ROLLER ASSEMBLY 652
DISASSEMBLY 652
ASSEMBLY 653
TRACK ROLLER ASSEMBLY 654
REMOVAL, INSTALLATION 654
TRACK ROLLER ASSEMBLY 655
DISASSEMBLY 655
ASSEMBLY 656
HYDRAULIC TANK ASSEMBLY 658
REMOVAL 658
INSTALLATION 660
MAIN PUMP (NO 1 PUMP) ASSEMBLY 661
REMOVAL 661
INSTALLATION 662
MAIN PUMP (NO 2 PUMP) ASSEMBLY 663
REMOVAL 663
INSTALLATION 664
MAIN PUMP INPUT SHAFT OIL SEAL 665
REMOVAL, INSTALLATION 665
CONTROL・PTO LUBRICATION PUMP ASSEMBLY 666
REMOVAL, INSTALLATION 666
MAIN RELIEF VALVE ASSEMBLY 667
DISASSEMBLY, ASSEMBLY 667
CONTROL VALVE ASSEMBLY 668
REMOVAL 668
INSTALLATION 670
DISASSEMBLY 671
ASSEMBLY 673
SOLENOID VALVE ASSEMBLY 675
REMOVAL 675
INSTALLATION 676
BOOM DAMPING VALVE ASSEMBLY 677
REMOVAL, INSTALLATION 677
SWING MOTOR ASSEMBLY 678
REMOVAL, INSTALLATION 678
CENTER SWIVEL JOINT ASSEMBLY 679
REMOVAL, INSTALLATION 679
CENTER SWIVEL JOINT ASSEMBLY 680
DISASSEMBLY, ASSEMBLY 680
TRAVEL MOTOR ASSEMBLY 681
REMOVAL, INSTALLATION 681
WORK EQUIPMENT PPC VALVE ASSEMBLY 682
DISASSEMBLY 682
ASSEMBLY 683
TRAVEL PPC VAVEL ASSEMBLY 684
DISASSEMBLY 684
ASSEMBLY 685
BUCKET CYLINDER ASSEMBLY 686
REMOVAL 686
INSTALLATION 688
ARM CYLINDER ASSEMBLY 690
REMOVAL 690
INSTALLATION 692
BOOM CYLINDER ASSEMBLY 694
REMOVAL 694
INSTALLATION 696
BOTTOM DUMP CYLINDER ASSEMBLY 698
REMOVAL 698
INSTALLATION 699
HYDRAULIC CYLINDER ASSEMBLY 700
DISASSEMBLY 700
ASSEMBLY 702
BUCKET ASSEMBLY 705
REMOVAL 705
INSTALLATION 707
ARM ASSEMBLY 709
REMOVAL 709
INSTALLATION 711
BOOM ASSEMBLY 713
REMOVAL 713
INSTALLATION 715
WORK EQUIPMENT ASSEMBLY 717
REMOVAL 717
INSTALLATION 719
OPERATOR’S CAB ASSEMBLY 721
REMOVAL 721
INSTALLATION 722
COUNTERWEIGHT ASSEMBLY 723
REMOVAL, INSTALLATION 723
90 OTHERS 724
HYDRAULIC CIRCUIT DRAWING (BACKHOE SPECIFICATION) 725
HYDRAULIC CIRCUIT DRAWING (LOADING SHOVEL SPECIFICATION) 726
ELECTRIC CIRCUIT DIAGRAM (1/4) 727
ELECTRIC CIRCUIT DIAGRAM (2/4) 728
ELECTRIC CIRCUIT DIAGRAM (3/4) 729
ELECTRIC CIRCUIT DIAGRAM (4/4) 730

DESCRIPTION:

Komatsu PC750-6 PC800-6 Excavator Shop Manual SEBM025305 – PDF DOWNLOAD 

MACHINE MODEL   SERIAL NUMBER
PC750-6                       11001 and up
PC750SE-6                   11001 and up
PC750LC-6                    11001 and up
PC800-6                         31001 and up
PC800SE-6                    31001 and up

FOREWORD
GENERAL

• This shop manual has been prepared as an aid to improve the quality of repairs by giving the serviceman an
  accurate understanding of the product and by showing him the correct way to perform repairs and make judgements.
  Make sure you understand the contents of this manual and use it to full effect at every opportunity.
• This shop manual mainly contains the necessary technical information for operations performed in a service
  workshop. For ease of understanding, the manual is divided into the following chapters; these chapters are further
  divided into the each main group of components.

STRUCTURE AND FUNCTION
This section explains the structure and function of each component. It serves not only to give an understanding
of the structure, but also serves as reference material for troubleshooting.
In addition, this section may contain hydraulic circuit diagrams, electric circuit diagrams, and maintenance
standards.
TESTING AND ADJUSTING
This section explains checks to be made before and after performing repairs, as well as adjustments to
be made at completion of the checks and repairs.
Troubleshooting charts correlating “Problems” with “Causes” are also included in this section.
DISASSEMBLY AND ASSEMBLY
This section explains the procedures for removing, installing, disassembling and assembling each component,
as well as precautions for them.
MAINTENANCE STANDARD
This section gives the judgment standards for inspection of disassembled parts.
The contents of this section may be described in STRUCTURE AND FUNCTION.
OTHERS
This section mainly gives hydraulic circuit diagrams and electric circuit diagrams.
In addition, this section may give the specifications of attachments and options together.

IMAGES PREVIEW OF THE MANUAL:

S.V  25/12/24