Komatsu PC300LC-6 PC300HD-6 Hydraulic Excavator Shop Manual CEBM3006C2 PDF

Description

Komatsu PC300LC-6 PC300HD-6 Hydraulic Excavator Shop Manual CEBM3006C2 – PDF DOWNLOAD

FILE DETAILS:

Komatsu PC300LC-6 PC300HD-6 Hydraulic Excavator Shop Manual CEBM3006C2 – PDF DOWNLOAD

Language : English
Pages : 763
Downloadable : Yes
File Type : PDF

IMAGES PREVIEW OF THE MANUAL:

TABLE OF CONTENTS:

Komatsu PC300LC-6 PC300HD-6 Hydraulic Excavator Shop Manual CEBM3006C2 – PDF DOWNLOAD

SERIAL NUMBERS

• PC3OOLC-6 – A80001  and up
• PC300HD-6 – A80001 and up

MAIN MENU 0
CONTENTS 2
00 SAFETY/FOREWARD 9
01 GENERAL 24
SPECIFICATION DRAWINGS 25
PC300LC-6 25
PC300HD-6 27
SPECIFICATIONS 29
PC300LC-6 29
PC300HD-6 29
WEIGHT TABLE 31
PC300LC-6 31
PC300HD-6 31
FUEL, COOLANT AND LUBRICANTS 33
PC300LC-6 33
PC300HD-6 34
ENGINE OIL SPECIFICATIONS 35
DIESEL FUEL SPECIFICATIONS 36
COOLANT SPECIFICATIONS 37
10 STRUCTURE AND FUNCTION 43
ENGINE RELATED PARTS 44
RADIATOR OIL COOLER 46
POWER TRAIN 47
FINAL DRIVE PC300LC-6 48
FINAL DRIVE PC300HD-6 49
SWING CIRCLE 50
SWING MACHINERY 51
TRACK FRAME RECOIL SPRING 52
TRACK SHOE 54
HYDRAULIC PIPING DRAWING 55
HYDRAULIC CIRCUIT DIAGRAM 56
HYDRAULIC TANK 57
HYDRAULIC PUMP 58
CONTROL PUMP 77
SUCTION SAFETY VALVE 88
CLSS 89
SWING MOTOR 131
CENTER SWIVEL JOINT 135
TRAVEL MOTOR 136
VALVE CONTROL 151
WORK EQUIPMENT SWING PPC VALVE 152
TRAVEL PPC VALVE 156
SERVICE PPC VALVE 160
PPC SAFETY LOCK VALVE 163
PPC ACCUMULATOR 163
PPC SHUTTLE VALVE TRAVEL JUNCTION VALVE 164
EPC SOLENOID VALVE 171
FOR LS SELECT, BOOM HI 2-STAGE SAFETY VALVE, MERGE/FLOW DIVIDER, TRAVEL SPEED, SWING BRAKE 171
FOR LS VALVE CONTROL 173
BOOM HOLDING VALVE 176
HYDRAULIC CYLINDER 179
WORK EQUIPMENT 180
ELECTRICAL WIRING DIAGRAM 181
ELECTRICAL CIRCUIT DIAGRAM 183
ENGINE CONTROL 186
ELECTRONIC CONTROL SYSTEM 192
MACHINE MONITOR SYSTEM 215
20 TESTING AND ADJUSTMENT 222
STANDARD VALUE TABLE FOR ENGINE 223
STANDARD VALUE TABLE FOR CHASSIS PARTS 224
STANDARD VALUE TABLE FOR ELECTRICAL PARTS 232
TOOLS FOR TESTING, ADJUSTING AND TROUBLESHOOTING 240
MEASURING ENGINE SPEED 241
MEASURING INTAKE MANIFOLD PRESSURE 242
MEASURING INTAKE AIR RESTRICTION 243
MEASURING LUBRICATING OIL PRESSURE 244
MEASURING FUEL (FILTER) INLET RESTRICTION 245
MEASURING BLOWBY PRESSURE 246
MEASURING ENGINE BACK PRESSURE 247
MEASURING EXHAUST COLOR 248
MEASURING COOLANT TEMPERATURE 249
MEASURING VALVE CLEARANCE 250
TESTING AND ADJUSTING GOVERNOR MOTOR LEVER STROKE 251
TESTING AND ADJUSTING HYDRAULIC PRESSURE IN WORK EQUIPMENT, SWING, TRAVEL CIRCUIT 252
TESTING AND ADJUSTING TVC VALVE OUTPUT PRESSURE (SERVO PISTON INPUT PRESSURE) 255
TESTING AND ADJUSTING LS VALVE OUTPUT PRESSURE (SERVO PISTON INPUT PRESSURE) AND LS DIFFERENTIAL PRESSURE 257
TESTING AND ADJUSTING CONTROL PUMP CIRCUIT OIL PRESSURE 260
TESTING SOLENOID VALVE OUTPUT PRESSURE 262
MEASURING PPC VALVE OUTPUT PRESSURE AND TESTING PPC SHUTTLE VALVE 264
ADJUSTING WORK EQUIPMENT SWING PPC VALVE 266
TESTING TRAVEL DEVIATION 267
TESTING LOCATIONS CAUSING HYDRAULIC DRIFT OF WORK EQUIPMENT 268
MEASURING OIL LEAKAGE 270
RELEASING REMAINING PRESSURE IN HYDRAULIC CIRCUIT 272
TESTING CLEARANCE OF SWING CIRCLE BEARING 273
TESTING AND ADJUSTING TRACK SHOE TENSION 274
BLEEDING AIR 275
TROUBLESHOOTING 277
TROUBLESHOOTING 277
POINTS TO REMEMBER WHEN TROUBLESHOOTING 278
SEQUENCE OF EVENTS IN TROUBLESHOOTING 279
POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE 280
CHECKS BEFORE TROUBLESHOOTING 289
CONNECTOR TYPES AND MOUNTING LOCATIONS 290
CONNECTOR ARRANGEMENT DIAGRAM 292
CONNECTION TABLE FOR CONNECTOR PIN NUMBERS 294
EXPLANATION OF CONTROL MECHANISM FOR ELECTRICAL SYSTEM 305
DISPLAY METHOD AND SPECIAL FUNCTION OF MONITORING PANEL 306
METHOD OF USING JUDGEMENT TABLE 314
METHOD OF USING TROUBLSHOOTING CHARTS 316
DETAILS OF TROUBLESHOOTING AND TROUBLESHOOTING PROCEDURE 318
SERVICE CODE TABLE 323
TROUBLESHOOTING OF COMMUNICATION ABNORMALITY SYSTEM (N MODE) 324
N-1 [E218] Communication abnormality 325
TROUBLESHOOTING OF GOVERNOR PUMP CONTROLLER (GOVERNOR CONTROL SYSTEM) (N MODE) 327
POINTS TO REMEMBER WHEN CARRYING OUT TROUBLESHOOTING OF GOVERNOR, PUMP CONTROLLER SYSTEM 328
ACTIONS TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE 329
JUDGEMENT TABLE FOR GOVERNOR, PUMP GOVERNOR (GOVERNOR CONTROL SYSTEM) AND RELATED PARTS 333
ELECTRICAL CIRCUIT DIAGRAM FOR E MODE SYSTEM 335
E-1 Abnormality in governor, pump controller power source (controller LED is OFF) 337
E-2 [E308] Abnormality in fuel control dial input value is displayed 338
E-3 [317] Abnormality (disconnection) in motor drive system is displayed 339
E-4 [318] Abnormality (short circuit) in motor drive system is displayed 340
E-5 [E306] Abnormality in feedback potentiometer system is displayed 341
E-6 [E315] Abnormality (short circuit) in battery relay output system is displayed 342
E-7 [E316] Abnormality (step-out) in motor displayed 343
E-8 Engine does not start 344
E-9 Engine speed is irregular 346
E-10 Lack of output (engine high idling speed is to low) 350
E-11 Engine does not stop 352
E-12 Defective operation of battery relay system (engine does not stop) 354
TROUBLESHOOTING OF ENGINE SYSTEM 356
METHOD OF USING TROUBLESHOOTING CHARTS 357
S-1 Starting performance is poor (starting always takes time) 361
S-2 Engine does not start 362
S-3 Engine does not pick up smoothly (follow up is poor) 365
S-4 Engine stops during operations 366
S-5 Engine does not rotate smoothly (hunting) 367
S-6 Engine lacks output (no power) 368
S-7 Engine smoke is black (incomplete combustion) 369
S-8 Oil consumption is excessive (or exhaust smoke is blue) 370
S-9 Oil becomes contaminated quickly 371
S-10 Fuel consumption is excessive 372
S-11 Oil is in cooling water, or water spurts back, or water level goes down 373
S-12 Oil pressure caution lamp lights up (drop in oil pressure) 374
S-13 Oil level rises (water, fuel in oil) 375
S-14 Water temperature becomes too high (overheating) 376
S-15 Abnormal noise is made 377
S-16 Vibration is excessive 378
TROUBLESHOOTING OF GOVERNOR, PUMP CONTROLLER (PUMP CONTROL SYSTEM) (C MODE) 379
POINT TO REMEMBER WHEN TROUBLESHOOTING PUMP CONTROLLER SYSTEM 380
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE 381
JUDGEMENT TABLE FOR GOVERNOR, PUMP CONTROLLER (PUMP CONTROL SYSTEM) AND HYDRAULIC RELATED PARTS 387
ELECTRICAL CIRCUIT DIAGRAM FOR C MODE 389
C-1 Abnormality in controller power source system (controller LED is OFF) 391
C-2 [E232] Short circuit in front pump TVC solenoid system is displayed 392
C-3 [E233] Disconnection in front pump TVC solenoid system is displayed 394
C-4 [E236] Short circuit in rear pump TVC solenoid system is displayed 396
C-5 [E237] Disconnection in rear pump WC solenoid system is displayed 398
C-6 [E202] Short circuit in LS select solenoid system is displayed 400
C-7 [E212] Disconnection in LS select solenoid system is displayed 401
C-8 [E203] Short circuit in swing brake solenoid system is displayed 402
C-9 [E213] Disconnection in swing brake solenoid system is displayed 404
C-10 [E204] Short circuit in pump merge/divider solenoid system is displayed 406
C-11 [E214] Disconnection in pump merge/divider solenoid system is displayed 407
C-12 [E206] Short circuit in travel speed solenoid system is displayed 408
C-13 [E216] Disconnection in travel speed selector solenoid system is displayed 409
C-14 [E217] Model selection input error is displayed 410
C-15 [E222] Short circuit in LS-EPC solenoid system is displayed 412
C-16 [E223] Disconnection in LS-EPC solenoid system is displayed 413
C-17 [E224] Abnormality in front pump pressure sensor system is displayed 414
C-18 [E225] Abnormality in rear pump pressure sensor system is displayed 415
C-19 [E226] Abnormality in pressure sensor power source system is displayed 416
C-20 [E227] Abnormality in engine speed sensor system is displayed 417
C-21 Abnormality in machine push up solenoid system (no service code displayed) 418
TROUBLESHOOTING OF HYDRAULIC, MECHANICAL SYSTEM (H MODE) 433
PUMP MERGE/DIVIDER LOGIC 434
LS SELECT LOGIC 435
SOLENOID ACTUATION TABLE 435
TABLE OF FAILURE MODES AND CAUSES 436
H-1 Speeds of all work equipment, swing, travel are slow or lack power 440
H-2 There is excessive drop in engine speed, or engine stalls 442
H-3 No work equipment, travel, swing move 443
H-4 Abnormal noise generated (around pump) 443
H-5 Auto-deceleration does not work (when PPC shuttle valve is cause) 444
H-6 Fine control ability is poor or response is poor 445
H-7 Boom is slow or lacks power 446
H-8 Arm is slow or lacks power 448
H-9 Bucket is slow or lacks power 450
H-10 Work equipment (boom, arm, bucket) does not move (but travel and swing are normal) 451
H-11 Excessive hydraulic drift (boom, arm, bucket) 451
H-12 Excessive time lag (engine at low idling) 452
H-13 Other equipment moves when single circuit is relieved 452
H-14 In L/O, F/O modes, work equipment speed is faster than specified speed 453
H-15 Defective actuation of machine push-up function 453
H-16 In compound operations, work equipment with larger load is slow 453
H-17 In swing + boom RAISE, boom RAISE is slow 454
H-18 In swing + arm, arm is slow 454
H-19 In swing + travel, travel speed drops excessively 454
H-20 Travel deviation 455
H-21 Travel speed is slow 456
H-22 Steering does not turn easily or lacks power 458
H-23 Travel speed does not switch or is faster than specified speed 460
H-24 Travel speed does not switch or is faster than specified speed 460
H-25 Does not swing 461
H-26 Swing acceleration is poor or swing speed is slow 462
H-27 Excessive overrun when stopping swing 464
H-28 Excessive shock when stopping swing (one direction only) 465
H-29 Excessive abnormal noise when stopping swing 465
H-30 Excessive hydraulic drift of swing 466
H-31 Swing speed is faster than specified swing speed 467
TROUBLESHOOTING OF GOVERNOR, PUMP CONTROLLER (INPUT SIGNAL SYSTEM) (F MODE) 420
ELECTRICAL CIRCUIT DIAGRAM FOR F MODE 421
F-1 Bit pattern 20-(l) Swing oil pressure switch does not light up 423
F-2 Bit pattern 2042) Travel oil pressure switch does not light up 424
F-3 Bit pattern 20-(3) Boom LOWER oil pressure switch does not light up 425
F-4 Bit pattern 20-(4) Boom RAISE oil pressure switch does not light up 426
F-5 Bit pattern 20-(5) Arm IN oil pressure switch does not light up 427
F-6 Bit pattern 20-(6) Arm OUT oil pressure switch does not light up 428
F-7 Bit pattern 21-(l) Bucket CURL oil pressure switch does not light up 429
F-8 Bit pattern 2142) Bucket DUMP oil pressure switch does not light up 430
F-9 Bit pattern 2%(3) Swing lock switch does not light up 431
F-11 Bit pattern 22-(6) L H knob switch does not light up 432
TROUBLESHOOTING OF HYDRAULIC, MONITOR SYSTEM (M MODE) 468
ACTION TAKEN BY MONITOR PANEL WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE 470
ELECTRICAL CIRCUIT DIAGRAM FOR M MODE 472
M-1 [E101] Abnormality in error data is displayed [E101] Error in clock data is displayed 475
M-2 [E103] Short circuit in buzzer output or contact of 24V wiring harness with buzzer drive harness is displayed 476
M-3 [E104] Air cleaner clogging detected is displayed 477
M-4 [E106] Drop in engine oil Hi pressure detected is displayed 477
M-5 [E108] Engine water temperature 105°C detected is displayed 478
M-6 When starting switch is turned ON, none of lamps on monitor panel light up for 3 seconds 479
M-7 When starting switch is turned ON, monitor panel lamps all stay lighted up and do not go out 481
M-8 When starting switch is turned ON, items lighted up on monitor panel are different from actual machine (model) 481
M-9 When starting switch is turned ON (engine stopped), basic check items flashes 482
M-10 Preheating is not used but (preheating monitor) lights up 485
M-11 When starting switch is turned ON and engine is started, basic check items flash 486
M-12 When starting switch is turned ON (engine speed), caution items, emergency items flash 488
M-13 When starting switch is turned ON and engine is started, caution items, emergency items flash 490
M-14 When staring switch is turned ON (engine stopped), buzzer doesn’t sound for 1 second Caution item flashes but doesn’t sound 493
M-15 No abnormality is displayed on monitor but buzzer sounds 493
M-16 Night light on monitor panel does not light up (liquid crystal display is normal) 494
M-17 Coolant temperature gauge does not rise 495
M-18 Coolant temperature gauge does not give any display (none of gauge lamps light up during operation) 495
M-19 Fuel level gauge always displays FULL 496
M-20 Fuel level gauge does not give display 496
M-21 Swing lock switch is turned ON (LOCK) but (swing lock monitor) does not light up 497
M-22 Swing prolix switch is turned ON (LOCK) but (swing lock monitor) does not flash 497
M-23 Service meter does not advance while engine is running 498
M-24 When starting switch is at OFF and time switch is pressed, time and service meter are not displayed 498
M-25 Defective fuel level sensor system 499
M-26 Defective coolant temperature sensor system 500
M-27 Defective engine oil level sensor system 501
M-28 Defective coolant level sensor system 502
M-29 Defective hydraulic oil level sensor system 503
M-30 Wiper does not work or switch is not being used but wiper is actuated 504
30 DISASSEMBLY AND ASSEMBLY 508
METHOD OF USING MANUAL 510
PRECAUTIONS WHEN CARRYING OUT OPERATION 512
SPECIAL TOOL LIST 514
SKETCHES OF SPECIAL TOOLS 522
STARTING MOTOR 530
ALTERNATOR 530
ENGINE OIL COOLER 530
FUEL INJECTION PUMP 530
WATER PUMP 531
NOZZLE HOLDER 531
TURBOCHARGER 531
THERMOSTAT 531
ENGINE FRONT SEAL 532
CYLINDER HEAD 532
GOVERNOR MOTOR 533
REMOVAL OF GOVERNOR MOTOR 533
INSTALLATION OF GOVERNOR MOTOR 533
HYDRAULIC COOLER 534
REMOVAL OF HYDRAULIC COOLER 534
INSTALLATION OF HYDRAULIC COOLER 534
RADIATOR, HYDRAULIC COOLER 535
REMOVAL OF RADIATOR, HYDRAULIC COOLER 535
INSTALLATION OF RADIATOR, HYDRAULIC COOLER 536
ENGINE, MAIN PUMP 537
REMOVAL OF ENGINE, MAIN PUMP 537
INSTALLATION OF ENGINE, MAIN PUMP 540
DAMPER 541
REMOVAL OF DAMPER 541
INSTALLATION OF DAMPER 541
FUEL TANK 542
REMOVAL OF FUEL TANK 542
INSTALLATION OF FUEL TANK 542
CENTER SWIVEL JOINT 543
REMOVAL OF CENTER SWIVEL JOINT 543
INSTALLATION OF CENTER JOINT 543
DISASSEMBLY OF CENTER SWIVEL JOINT 544
ASSEMBLY OF CENTER SWIVEL JOINT 544
FINAL DRIVE – PC3OOLC 545
REMOVAL OF FINAL DRIVE – PC3OOLC 545
INSTALLATION OF FINAL DRIVE 545
DISASSEMBLY OF FINAL DRIVE 546
ASSEMBLY OF FINAL DRIVE 550
FINAL DRIVE – PC300HD 557
REMOVAL OF FINAL DRIVE – PC300HD 557
INSTALLATION OF FINAL DRIVE 557
DISASSEMBLY OF FINAL DRIVE 558
ASSEMBLY OF FINAL DRIVE 562
TRAVEL MOTOR – PC3OOLC 569
DISASSEMBLY OF TRAVEL MOTOR – PC3OOLC 569
ASSEMBLY OF TRAVEL MOTOR 573
TRAVEL MOTOR – PC300HD 582
DISASSEMBLY OF TRAVEL MOTOR – PC300HD 582
ASSEMBLY OF TRAVEL MOTOR 586
SPROCKET 596
REMOVAL OF SPROCKET 596
INSTALLATION OF SPROCKET 596
SWING MOTOR 597
REMOVAL OF SWING MOTOR 597
INSTALLATION OF SWING MOTOR 597
DISASSEMBLY OF SWING MOTOR 598
ASSEMBLY OF SWING MOTOR 600
SWING MACHINERY 607
REMOVAL OF SWING MACHINERY 607
INSTALLATION OF SWING MACHINERY 607
DISASSEMBLY OF SWING MACHINERY 607
ASSEMBLY OF SWING MACHINERY 611
REVOLVING FRAME 616
REMOVAL OF REVOLVING FRAME 616
INSTALLATION OF REVOLVING FRAME 617
SWING CIRCLE 618
REMOVAL OF SWING CIRCLE 618
INSTALLATION OF SWING CIRCLE 618
IDLER, RECOIL SPRING 619
REMOVAL OF IDLER, RECOIL SPRING 619
INSTALLATION OF IDLER, RECOIL SPRING 619
IDLER – PC3OOLC 620
DISASSEMBLY OF IDLER – PC3OOLC 620
ASSEMBLY OF IDLER 621
IDLER – PC300HD 623
DISASSEMBLY OF IDLER – PC300HD 623
ASSEMBLY OF IDLER 624
RECOIL SPRING 626
DISASSEMBLY OF RECOIL SPRING 626
ASSEMBLY OF RECOIL SPRING 627
TRACK ROLLER 628
REMOVAL OF TRACK ROLLER 628
INSTALLATION OF TRACK ROLLER 628
DISASSEMBLY OF TRACK ROLLER 629
ASSEMBLY OF TRACK ROLLER 630
CARRIER ROLLER 632
REMOVAL OF CARRIER ROLLER 632
INSTALLATION OF CARRIER ROLLER 632
DISASSEMBLY OF CARRIER ROLLER 633
ASSEMBLY OF CARRIER ROLLER 634
TRACK SHOE 637
REMOVAL OF TRACK SHOE 637
INSTALLATION OF TRACK SHOE 637
HYDRAULIC TANK 638
REMOVAL OF HYDRAULIC TANK 638
INSTALLATION OF HYDRAULIC TANK 639
CONTROL PUMP 640
REMOVAL OF CONTROL PUMP 640
INSTALLATION OF CONTROL PUMP 640
MAIN PUMP 641
REMOVAL OF MAIN PUMP 641
INSTALLATION OF MAIN PUMP 642
DISASSEMBLY OF MAIN PUMP 643
ASSEMBLY OF MAIN PUMP 649
CHECKING CONTACT BETWEEN CYLINDER BLOCK AND VALVE PLATE, ROCKER CAM AND CRADLE, VALVE PLATE AND END CAP 658
MAIN PUMP INPUT SHAFT OIL SEAL 660
REMOVAL OF MAIN PUMP INPUT SHAFT OIL SEAL 660
INSTALLATION OF MAIN PUMP INPUT SHAFT OIL SEAL 660
CONTROL VALVE 661
REMOVAL OF CONTROL VALVE 661
INSTALLATION OF CONTROL VALVE 663
DISASSEMBLY OF CONTROL VALVE 664
ASSEMBLY OF CONTROL VALVE 667
PUMP MERGE/DIVIDER VALVE 671
DISASSEMBLY OF PUMP MERGE/DIVIDER VALVE 671
ASSEMBLY OF PUMP MERGE/DIVIDER VALVE 671
PRESSURE COMPENSATION VALVE 672
DISASSEMBLY OF PRESSURE COMPENSATION VALVE 672
ASSEMBLY OF PRESSURE COMPENSATION VALVE 672
SERVO VALVE FOR FRONT PUMP 673
REMOVAL OF SERVO VALVE FOR FRONT PUMP 673
INSTALLATION OF SERVO VALVE FOR FRONT PUMP 673
SERVO VALVE FOR REAR PUMP 674
REMOVAL OF SERVO VALVE FOR REAR PUMP 674
INSTALLATION OF SERVO VALVE FOR REAR PUMP 674
LS-EPC SOLENOID VALVE 675
REMOVAL OF LS-EPC SOLENOID VALVE 675
INSTALLATION OF LS-EPC SOLENOID VALVE 675
SOLENOID VALVE 676
REMOVAL OF SOLENOID VALVE 676
INSTALLATION OF SOLENOID VALVE 676
WORK EQUIPMENT PPC VALVE 677
REMOVAL OF WORK EQUIPMENT PPC VALVE 677
INSTALLATION OF WORK EQUIPMENT PPC VALVE 677
WORK EQUIPMENT PPC VALVE 678
DISASSEMBLY OF WORK EQUIPMENT PPC VALVE 678
ASSEMBLY OF WORK EQUIPMENT PPC VALVE 678
TRAVEL PPC VALVE 679
REMOVAL OF TRAVEL PPC VALVE 679
INSTALLATION OF TRAVEL PPC VALVE 679
DISASSEMBLY OF TRAVEL PPC VALVE 680
ASSEMBLY OF TRAVEL PPC VALVE 681
REMOVAL OF PPC SHUTTLE VALVE 682
INSTALLATION OF PPC SHUTTLE VALVE 683
DISASSEMBLY OF PPC SHUTTLE VALVE 684
ASSEMBLY OF PPC SHUTTLE VALVE 685
BOOM LOCK VALVE 686
REMOVAL OF BOOM LOCK VALVE 686
INSTALLATION OF BOOM LOCK VALVE 686
DISASSEMBLY OF BOOM LOCK VALVE 686
ASSEMBLY OF BOOM LOCK VALVE 686
BOOM CYLINDER 687
REMOVAL OF BOOM CYLINDER 687
INSTALLATION OF BOOM CYLINDER 688
ARM CYLINDER 689
REMOVAL OF ARM CYLINDER 689
INSTALLATION OF ARM CYLINDER 690
BUCKET CYLINDER 691
REMOVAL OF BUCKET CYLINDER 691
INSTALLATION OF BOOM CYLINDER 692
HYDRAULIC CYLINDER 693
DISASSEMBLY OF HYDRAULIC CYLINDER 693
ASSEMBLY OF HYDRAULIC CYLINDER 695
WORK EQUIPMENT 697
REMOVAL OF WORK EQUIPMENT 697
INSTALLATION OF WORK EQUIPMENT 698
BUCKET 699
REMOVAL OF BUCKET 699
INSTALLATION OF BUCKET 700
ARM 701
REMOVAL OF ARM 701
INSTALLATION OF ARM 702
BUCKET, ARM 703
REMOVAL OF BUCKET, ARM 703
INSTALLATION OF BUCKET, ARM 704
BOOM 705
REMOVAL OF BOOM 705
INSTALLATION OF BOOM 706
OPERATORS CAB 707
REMOVAL OF OPERATORS CAB 707
INSTALLATION OF OPERATORS CAB 708
COUNTERWEIGHT 709
REMOVAL OF COUNTERWEIGHT 709
INSTALLATION OF COUNTERWEIGHT 709
AIR CONDITIONER COMPRESSOR 710
REMOVAL OF AIR CONDITIONER COMPRESSOR 710
INSTALLATION OF AIR CONDITIONER COMPRESSOR 710
CONDENSER 711
REMOVAL OF CONDENSER 711
INSTALLATION OF CONDENSER 711
AIR CONDITIONER UNIT 712
REMOVAL OF AIR CONDITIONER UNIT 712
INSTALLATION OF AIR CONDITIONER UNIT 713
GOVERNOR, PUMP CONTROLLER 714
REMOVAL OF GOVERNOR, PUMP CONTROLLER 714
INSTALLATION OF GOVERNOR, PUMP CONTROLLER 714
MONITOR PANEL 715
REMOVAL OF MONITOR PANEL 715
INSTALLATION OF MONITOR PANEL 715
CONTROL STAND CASE 716
REMOVAL OF CONTROL STAND CASE 716
INSTALLATION OF CONTROL STAND CASE 717
40 MAINTENANCE STANDARD 718
ENGINE MOUNT 719
SWING MACHINERY 720
SWING CIRCLE 722
FINAL DRIVE (PC300LC-6) 723
FINAL DRIVE (PC300HD-6) 725
TRACK FRAME – RECOIL SPRING (PC300LC-6) 727
TRACK FRAME – RECOIL SPRING (PC300HD-6) 728
IDLER (PC300LC-6) 729
IDLER (PC300HD-6) 731
CARRIER ROLLER 732
TRACK ROLLER 733
TRACK CHAIN ASSM (PC300LC-6) 735
TRACK CHAIN ASSM (PC300HD-6) 736
HYDRAULIC PUMP 737
CONTROL PUMP AND RELIEF VALVE 738
CONTROL VALVE (10-SPOOL) 739
SUCTION-SAFETY VALVE 745
SWING MOTOR 746
TRAVEL MOTOR (PC300LC-6) 747
TRAVEL MOTOR (PC300HD-6) 748
WORK EQUIPMENT – SWING PPC VALVE 749
TRAVEL PPC VALVE 750
SERVICE PPC VALVE 751
PPC SHUTTLE VALVE – TRAVEL JUNCTION VALVE 752
EPC – SOLENOID VALVE 753
CENTER SWIVEL JOINT 754
BOOM HOLDING VALVE 755
HYDRAULIC CYLINDER 756
WORK EQUIPMENT 757

DESCRIPTION:

Komatsu PC300LC-6 PC300HD-6 Hydraulic Excavator Shop Manual CEBM3006C2 – PDF DOWNLOAD

SERIAL NUMBERS

• PC3OOLC-6 – A80001  and up
• PC300HD-6 – A80001 and up

FOREWARD
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 sections. These sections are further divided into
each main group of components.
GENERAL
This section lists the general machine dimensions, performance specifications, component weights, and fuel,
coolant and lubricant specification charts.
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.
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” to “Causes” are also
included in this section.
DISASSEMBLY AND ASSEMBLY
This section explains the order to be followed when removing, installing, disassembling or assembling each
component, as well as precautions to be taken for these operations.
MAINTENANCE STANDARD
This section gives the judgement standards when inspecting disassembled parts.

G.B  14/12/24