Komatsu PC400-6 PC400LC-6 PC450-6 PC450LC-6 Excavator Shop Manual PDF

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Komatsu PC400-6 PC400LC-6 PC450-6 PC450LC-6 Excavator Shop Manual SEBM006704 – PDF DOWNLOAD

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Komatsu PC400-6 PC400LC-6 PC450-6 PC450LC-6 Excavator Shop Manual SEBM006704 – PDF DOWNLOAD

Language : English
Pages : 775
Downloadable : Yes
File Type : PDF

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TABLE OF CONTENTS:

Komatsu PC400-6 PC400LC-6 PC450-6 PC450LC-6 Excavator Shop Manual SEBM006704 – PDF DOWNLOAD 

MACHINE MODEL    SERIAL NUMBER
PC400-6                          30001 and up
PC400LC-6                     30001 and up
PC450-6                         10001 and up
PC450LC-6                     10001 and up

COVER 1
CONTENTS 2
01 GENERAL 28
SPECIFICATION DRAWINGS 29
SPECIFICATIONS 31
WEIGHT TABLE 35
FUEL, COOLANT AND LUBRICANTS 39
10 STRUCTURE AND FUNCTION 41
PARTS RELATED TO ENGINE 42
RADIATOR, OIL COOLER 44
POWER TRAIN 45
FINAL DRIVE 46
SWING CIRCLE 47
SWING MACHINERY 48
TRACK FRAME, RECOIL SPRING 49
TRACK SHOE 50
HYDRAULIC PIPING DRAWING 51
HYDRAULIC CIRCUIT DIAGRAM 52
HYDRAULIC TANK, HYDRAULIC FILTER 53
HYDRAULIC PUMP 54
CONTROL VALVE 75
SUCTION SAFETY VALVE 84
CLSS 85
SWING MOTOR 127
CENTER SWIVEL JOINT 131
TRAVEL MOTOR 132
VALVE CONTROL 141
WORK EQUIPMENT, SWING PPC VALVE 142
TRAVEL PPC VALVE 146
SERVICE PPC VALVE 150
PPC SAFETY LOCK VALVE 153
PPC ACCUMULATOR 153
PPC SHUTTLE VALVE, TRAVEL JUNCTION VALVE 154
EPC SOLENOID VALVE 161
FOR LS SELECT, BOOM HI 2-STAGE SAFETY VALVE, MERGE/FLOW DIVIDER, TRAVEL SPEED, SWING BRAKE 161
FOR LS VALVE CONTROL 163
BOOM HOLDING VALVE 166
HYDRAULIC CYLINDER 169
WORK EQUIPMENT 170
ACTUAL ELECTRIC WIRING DIAGRAM 171
ELECTRIC CIRCUIT DIAGRAM 173
ENGINE CONTROL 176
ELECTRONIC CONTROL SYSTEM 182
MACHINE MONITOR SYSTEM 205
FRONT WINDOW AUTO PULL-UP SYSTEM 212
20 TESTING AND ADJUSTING 214
STANDARD VALUE TABLE FOR ENGINE RELATED PARTS 215
STANDARD VALUE TABLE FOR CHASSIS RELATED PARTS 216
STANDARD VALUE TABLE FOR ELECTRICAL PARTS 224
TOOLS FOR TESTING, ADJUSTING, AND TROUBLESHOOTING 232
MEASURING ENGINE SPEED 233
MEASURING EXHAUST COLOR 234
ADJUSTING VALVE CLEARANCE 235
MEASURING COMPRESSION PRESSURE 236
MEASURING BLOW-BY PRESSURE 236
TESTING AND ADJUSTING FUEL INJECTION TIMING 237
MEASURING ENGINE OIL PRESSURE 238
TESTING AND ADJUSTING FAN BELT TENSION 239
TESTING AND ADJUSTING BELT TENSION FOR AIR CONDITIONER COMPRESSOR 239
ADJUSTING ENGINE SPEED SENSOR 240
MEASURING AIR SUPPLY PRESSURE (BOOST PRESSURE) 241
TESTING AND ADJUSTING GOVERNOR MOTOR LEVER STROKE 242
TESTING AND ADJUSTING HYDRAULIC PRESSURE IN WORK EQUIPMENT, SWING, TRAVEL CIRCUIT 243
TESTING AND ADJUSTING TVC VALVE OUTPUT PRESSURE (SERVO PISTON INPUT PRESSURE) 246
TESTING AND ADJUSTING LS VALVE OUTPUT PRESSURE (SERVO PISTON INPUT PRESSURE) AND LS DIFFERENTIAL PRESSURE 248
TESTING AND ADJUSTING CONTROL PUMP CIRCUIT OIL PRESSURE 251
TESTING SOLENOID VALVE OUTPUT PRESSURE 253
MEASURING PPC VALVE OUTPUT PRESSURE AND TESTING PPC SHUTTLE VALVE 255
ADJUSTING WORK EQUIPMENT, SWING PPC VALVE 257
TESTING TRAVEL DEVIATION 258
TESTING LOCATIONS CAUSING HYDRAULIC DRIFT OF WORK EQUIPMENT 259
MEASURING OIL LEAKAGE 261
RELEASING REMAINING PRESSURE IN HYDRAULIC CIRCUIT 263
TESTING CLEARANCE OF SWING CIRCLE BEARING 264
TESTING AND ADJUSTING TRACK SHOE TENSION 265
BLEEDING AIR 266
TROUBLESHOOTING 268
POINTS TO REMEMBER WHEN TROUBLESHOOTING 269
SEQUENCE OF EVENTS IN TROUBLESHOOTING 270
POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE 271
CHECKS BEFORE TROUBLESHOOTING 279
CONNECTOR TYPES AND MOUNTING LOCATIONS 280
CONNECTOR ARRANGEMENT DIAGRAM 282
CONNECTION TABLE FOR CONNECTOR PIN NUMBERS 284
EXPLANATION OF CONTROL MECHANISM OF ELECTRICAL SYSTEM 294
DISPLAY METHOD AND SPECIAL FUNCTIONS OF MONITOR PANEL 295
METHOD OF USING JUDGEMENT TABLE 303
METHOD OF USING TROUBLESHOOTING CHARTS 305
DETAILS OF TROUBLESHOOTING AND TROUBLESHOOTING PROCEDURE 307
SERVICE CODE TABLE 312
TROUBLESHOOTING OF COMMUNICATION ABNORMALITY SYSTEM (N MODE) 313
N-1 [E218] COMMUNICATION ABNORMALITY 314
TROUBLESHOOTING OF GOVERNOR, PUMP CONTROLLER (GOVERNOR CONTROL SYSTEM) (E MODE) 316
POINTS TO REMEMBER WHEN CARRYING OUT TROUBLESHOOTING OF GOVERNOR, PUMP CONTROLLER SYSTEM 317
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE 318
JUDGEMENT TABLE FOR GOVERNOR, PUMP GOVERNOR (GOVERNOR CONTROL SYSTEM) AND ENGINE RELATED PARTS 322
ELECTRICAL CIRCUIT DIAGRAM FOR E MODE SYSTEM 324
E-1 ABNORMALITY IN GOVERNOR, PUMP CONTROLLER POWER SOURCE (CONTROLLER LED IS OFF) 326
E-2 [E308] ABNORMALITY IN FUEL CONTROL DIAL INPUT VALUE IS DISPLAYED 327
E-3 [E317] ABNORMALITY (DISCONNECTION) IN MOTOR DRIVE SYSTEM IS DISPLAYED 328
E-4 [E318] ABNORMALITY (SHORT CIRCUIT) IN MOTOR DRIVE SYSTEM IS DISPLAYED 329
E-5 [E306] ABNORMALITY IN FEEDBACK POTENTIOMETER SYSTEM IS DISPLAYED 330
E-6 [E315] ABNORMALITY (SHORT CIRCUIT) IN BATTERY RELAY OUTPUT SYSTEM IS DISPLAYED 331
E-7 [E316] ABNORMALITY (STEP-OUT) IN MOTOR IS DISPLAYED 332
E-8 ENGINE DOES NOT START 333
E-9 ENGINE SPEED IS IRREGULAR 335
a) IDLING SPEED IS IRREGULAR 335
b) THERE IS HUNTING 337
E-10 LACK OF OUTPUT (ENGINE HIGH IDLING SPEED IS TOO LOW) 339
E-11 ENGINE DOES NOT STOP 341
E-12 DEFECTIVE OPERATION OF BATTERY RELAY SYSTEM (ENGINE DOES NOT STOP) 343
TROUBLESHOOTING OF ENGINE SYSTEM (S MODE) 345
METHOD OF USING TROUBLESHOOTING CHARTS 346
S-1 STARTING PERFORMANCE IS POOR (STARTING ALWAYS TAKES TIME) 350
S-2 ENGINE DOES NOT START 351
(1) ENGINE DOES NOT TURN 351
(2) ENGINE TURNS BUT NO EXHAUST SMOKE COMES OUT (FUEL IS NOT BEING INJECTED) 352
(3) EXHAUST SMOKE COMES OUT BUT ENGINE DOES NOT START (FUEL IS BEING INJECTED) 353
S-3 ENGINE DOES NOT PICK UP SMOOTHLY (FOLLOW-UP IS POOR) 354
S-4 ENGINE STOPS DURING OPERATIONS 355
S-5 ENGINE DOES NOT ROTATE SMOOTHLY (HUNTING) 356
S-6 ENGINE LACKS OUTPUT (NO POWER) 357
S-7 EXHAUST SMOKE IS BLACK (INCOMPLETE COMBUSTION) 358
S-8 OIL CONSUMPTION IS EXCESSIVE (OR EXHAUST SMOKE IS BLUE) 359
S-9 OIL BECOMES CONTAMINATED QUICKLY 360
S-10 FUEL CONSUMPTION IS EXCESSIVE 361
S-11 OIL IS IN COOLING WATER,OR WATER SPURTS BACK,OR WATER LEVEL GOES DOWN 362
S-12 OIL PRESSURE CAUTION LAMP LIGHTS UP (DROP IN OIL PRESSURE) 363
S-13 OIL LEVEL RISES (WATER, FUEL IN OIL) 364
S-14 WATER TEMPERATURE BECOMES TOO HIGH (OVERHEATING) 365
S-15 ABNORMAL NOISE IS MADE 366
S-16 VIBRATION IS EXCESSIVE 367
TROUBLESHOOTING OF GOVERNOR, PUMP CONTROLLER (PUMP CONTROL SYSTEM) (C MODE) 368
POINTS TO REMEMBER WHEN TROUBLESHOOTING PUMP CONTROLLER SYSTEM 369
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE 370
JUDGEMENT TABLE FOR GOVERNOR, PUMP CONTROLLER (PUMP CONTROL SYSTEM) AND HYDRAULIC RELATED PARTS 376
ELECTRICAL CIRCUIT DIAGRAM FOR C MODE 378
C-1 ABNORMALITY IN CONTROLLER POWER SOURCE SYSTEM (CONTROLLER LED IS OFF) 380
C-2 [E232] SHORT CIRCUIT IN FRONT PUMP TVC SOLENOID SYSTEM IS DISPLAYED 381
C-3 [E233] DISCONNECTION IN FRONT PUMP TVC SOLENOID SYSTEM IS DISPLAYED 383
C-4 [E236] SHORT CIRCUIT IN REAR PUMP TVC SOLENOID SYSTEM IS DISPLAYED 385
C-5 [E237] DISCONNECTION IN REAR PUMP TVC SOLENOID SYSTEM IS DISPLAYED 387
C-6 [E202] SHORT CIRCUIT IN LS SELECT SOLENOID SYSTEM IS DISPLAYED 389
C-7 [E212] DISCONNECTION IN LS SELECT SOLENOID SYSTEM IS DISPLAYED 390
C-8 [E203] SHORT CIRCUIT IN SWING BRAKE SOLENOID SYSTEM IS DISPLAYED 391
C-9 [E213] DISCONNECTION IN SWING BRAKE SOLENOID SYSTEM IS DISPLAYED 393
C-10 [E204] SHORT CIRCUIT IN PUMP MERGE/DIVIDER SOLENOID SYSTEM IS DISPLAYED 395
C-11 [E214] DISCONNECTION IN PUMP MERGE/DIVIDER SOLENOID SYSTEM IS DISPLAYED 396
C-12 [E206] SHORT CIRCUIT IN TRAVEL SPEED SOLENOID SYSTEM IS DISPLAYED 397
C-13 [E216] DISCONNECTION IN TRAVEL SPEED SELECTOR SOLENOID SYSTEM IS DISPLAYED 398
C-14 [E217] MODEL SELECTION INPUT ERROR IS DISPLAYED 399
C-15 [E222] SHORT CIRCUIT IN LS-EPC SOLENOID SYSTEM IS DISPLAYED 401
C-16 [E223] DISCONNECTION IN LS-EPC SOLENOID SYSTEM IS DISPLAYED 402
C-17 [E224] ABNORMALITY IN FRONT PUMP PRESSURE SENSOR SYSTEM IS DISPLAYED 403
C-18 [E225] ABNORMALITY IN REAR PUMP PRESSURE SENSOR SYSTEM IS DISPLAYED 404
C-19 [E226] ABNORMALITY IN PRESSURE SENSOR POWER SOURCE IS DISPLAYED 405
C-20 [E227] ABNORMALITY IN ENGINE SPEED SENSOR SYSTEM IS DISPLAYED 406
C-21 ABNORMALITY IN MACHINE PUSH-UP SOLENOID SYSTEM (NO SERVICE CODE DISPLAYED) 407
TROUBLESHOOTING OF GOVERNOR, PUMP CONTROLLER (INPUT SIGNAL SYSTEM) (F MODE) 409
ELECTRICAL CIRCUIT DIAGRAM FOR F MODE 410
F-1 BIT PATTERN 20-(1) SWING OIL PRESSURE SWITCH DOES NOT LIGHT UP 412
F-2 BIT PATTERN 20-(2) TRAVEL OIL PRESSURE SWITCH DOES NOT LIGHT UP 413
F-3 BIT PATTERN 20-(3) BOOM LOWER OIL PRESSURE SWITCH DOES NOT LIGHT UP 414
F-4 BIT PATTERN 20-(4) BOOM RAISE OIL PRESSURE SWITCH DOES NOT LIGHT UP 415
F-5 BIT PATTERN 20-(5) ARM IN OIL PRESSURE SWITCH DOES NOT LIGHT UP 416
F-6 BIT PATTERN 20-(6) ARM OUT OIL PRESSURE SWITCH DOES NOT LIGHT UP 417
F-7 BIT PATTERN 21-(1) BUCKET CURL OIL PRESSURE SWITCH DOES NOT LIGHT UP 418
F-8 BIT PATTERN 21-(2) BUCKET DUMP OIL PRESSURE SWITCH DOES NOT LIGHT UP 419
F-9 BIT PATTERN 21-(3) SWING LOCK SWITCH DOES NOT LIGHT UP 420
F-10 BIT PATTERN 22-(5) KEROSENE MODE CONNECTION DOES NOT LIGHT UP 421
F-11 BIT PATTERN 22-(6) L H KNOB SWITCH DOES NOT LIGHT UP 422
TROUBLESHOOTING OF HYDRAULIC, MECHANICAL SYSTEM (H MODE) 423
PUMP MERGE/DIVIDER LOGIC, LS SELECT LOGIC, SOLENOID ACTUATION TABLE 424
TABLE OF FAILURE MODES AND CAUSES 425
H-1 SPEEDS OF ALL WORK EQUIPMENT, SWING, TRAVEL ARE SLOW OR LACK POWER 429
H-2 THERE IS EXCESSIVE DROP IN ENGINE SPEED, OR ENGINE STALLS 431
H-3 NO WORK EQUIPMENT, TRAVEL, SWING MOVE 432
H-4 ABNORMAL NOISE GENERATED (AROUND PUMP) 432
H-5 AUTO-DECELERATION DOES NOT WORK 433
H-6 FINE CONTROL ABILITY IS POOR OR RESPONSE IS POOR 433
H-7 BOOM IS SLOW OR LACKS POWER 434
H-8 ARM IS SLOW OR LACKS POWER 436
H-9 BUCKET IS SLOW OR LACKS POWER 438
H-10 WORK EQUIPMENT (BOOM, ARM, BUCKET)DOES NOT MOVE (BUT TRAVEL AND SWING ARE NORMAL) 439
H-11 EXCESSIVE HYDRAULIC DRIFT (BOOM, ARM, BUCKET) 439
H-12 EXCESSIVE TIME LAG (ENGINE AT LOW IDLING) 440
H-13 OTHER EQUIPMENT MOVES WHEN SINGLE CIRCUIT IS RELIEVED 440
H-14 IN L/O, F/O MODES, WORK EQUIPMENT SPEED IS FASTER THAN SPECIFIED SPEED 441
H-15 DEFECTIVE ACTUATION OF MACHINE PUSH-UP FUNCTION 441
H-16 IN COMPOUND OPERATIONS, WORK EQUIPMENT WITH LARGER LOAD IS SLOW 441
H-17 IN SWING + BOOM RAISE, BOOM RAISE IS SLOW 442
H-18 IN SWING + ARM, ARM IS SLOW 442
H-19 IN SWING + TRAVEL, TRAVEL SPEED DROPS EXCESSIVELY 442
H-20 TRAVEL DEVIATION 443
H-21 TRAVEL SPEED IS SLOW 444
H-22 STEERING DOES NOT TURN EASILY OR LACKS POWER 446
H-23 TRAVEL SPEED DOES NOT SWITCH OR IS FASTER THAN SPECIFIED SPEED 448
H-24 TRAVEL DOES NOT MOVE (ONE SIDE ONLY) 448
H-25 DOES NOT SWING (BOTH LEFT AND RIGHT, ONE DIRECTION ONLY) 449
H-26 SWING ACCELERATION IS POOR OR SWING SPEED IS SLOW (BOTH LEFT AND RIGHT, ONE DIRECTION ONLY) 450
H-27 EXCESSIVE OVERRUN WHEN STOPPING SWING (BOTH LEFT AND RIGHT, ONE DIRECTION ONLY) 452
H-28 EXCESSIVE SHOCK WHEN STOPPING SWING (ONE DIRECTION ONLY) 453
H-29 EXCESSIVE ABNORMAL NOISE WHEN STOPPING SWING 453
H-30 EXCESSIVE HYDRAULIC DRIFT OF SWING (WHEN BRAKE IS ON, WHEN BRAKE IS OFF) 454
H-31 SWING SPEED IS FASTER THAN SPECIFIED SWING SPEED 455
TROUBLESHOOTING OF MACHINE MONITOR SYSTEM (M MODE) 456
ACTION TAKEN BY MONITOR PANEL WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE 458
ELECTRICAL CIRCUIT DIAGRAM FOR M MODE SYSTEM 460
M-1 [E101] ABNORMALITY IN ERROR DATA IS DISPLAYED, E[102] ERROR IN CLOCK DATA IS DISPLAYED 462
M-2 [E103] SHORT CIRCUIT IN BUZZER OUTPUT OR CONTACT OF 24V WIRING HARNESS WITH BUZZER DRIVE HARNESS IS DISPLAYED 463
M-3 [E104] AIR CLEANER CLOGGING DETECTED IS DISPLAYED 464
M-4 [E106] DROP IN ENGINE OIL HI PRESSURE DETECTED IS DISPLAYED 464
M-5 [E108] ENGINE WATER TEMPERATURE 105℃ DETECTED IS DISPLAYED 465
M-6 WHEN STARTING SWITCH IS TURNED ON, NONE OF LAMPS ON MONITOR PANEL LIGHT UP FOR 3 SECONDS 466
M-7 WHEN STARTING SWITCH IS TURNED ON, MONITOR PANEL LAMPS ALL STAY LIGHTED UP AND DO NOT GO OUT 468
M-8 WHEN STARTING SWITCH IS TURNED ON, ITEMS LIGHTED UP ON MONITOR PANEL ARE DIFFERENT FROM ACTUAL MACHINE (MODEL) 468
M-9 WHEN STARTING SWITCH IS TURNED ON (ENGINE STOPPED), BASIC CHECK ITEMS FLASHES 469
M-10 PREHEATING IS NOT BEING USED BUT (PREHEATING MONITOR) LIGHTS UP 472
M-11 WHEN STARTING SWITCH IS TURNED ON AND ENGINE IS STARTED, BASIC CHECK ITEMS FLASH 473
M-12 WHEN STARTING SWITCH IS TURNED ON (ENGINE STOPPED), CAUTION ITEMS, EMERGENCY ITEMS FLASH 475
M-13 WHEN STARTING SWITCH IS TURNED ON AND ENGINE IS STARTED, CAUTION ITEMS, EMERGENCY ITEMS FLASH 477
M-14 WHEN STARTING SWITCH IS TURNED ON (ENGINE STOPPED), BUZZER DOES NOT SOUND FOR 1 SECOND CAUTION ITEM FLASHES BUT BUZZER DOES NOT SOUND 480
M-15 NO ABNORMALITY IS DISPLAYED ON MONITOR BUT BUZZER SOUNDS 480
M-16 NIGHT LIGHTING ON MONITOR PANEL DOES NOT LIGHT UP (LIQUID CRYSTAL DISPLAY IS NORMAL) 481
M-17 COOLANT TEMPERATURE GAUGE DOES NOT RISE 482
M-18 COOLANT TEMPERATURE GAUGE DOES NOT GIVE ANY DISPLAY 482
M-19 FUEL LEVEL GAUGE ALWAYS DISPLAYS FULL 483
M-20 FUEL LEVEL GAUGE DOES NOT GIVE DISPLAY 483
M-21 SWING LOCK SWITCH IS TURNED ON (LOCK) BUT (SWING LOCK MONITOR) DOES NOT LIGHT UP 484
M-22 SWING PROLIX SWITCH IS TURNED ON (PROLIX), BUT (SWING LOCK MONITOR) DOES NOT FLASH 484
M-23 SERVICE METER DOES NOT ADVANCE WHILE ENGINE IS RUNNING 485
M-24 WHEN STARTING SWITCH IS AT OFF AND TIME SWITCH IS PRESSED, TIME AND SERVICE METER ARE NOT DISPLAYED 485
M-25 DEFECTIVE FUEL LEVEL SENSOR SYSTEM 486
M-26 DEFECTIVE COOLANT TEMPERATURE SENSOR SYSTEM 487
M-27 DEFECTIVE ENGINE OIL LEVEL SENSOR SYSTEM 488
M-28 DEFECTIVE COOLANT LEVEL SENSOR SYSTEM 489
M-29 DEFECTIVE HYDRAULIC OIL LEVEL SENSOR SYSTEM 490
M-30 WIPER DOES NOT WORK OR SWITCH IS NOT BEING USED BUT WIPER IS ACTUATED 491
M-31 ELECTRIC GREASE GUN DOES NOT WORK 495
30 DISASSEMBLY AND ASSEMBLY 496
METHOD OF USING MANUAL 498
PRECAUTIONS WHEN CARRYING OUT OPERATION 500
SPECIAL TOOL LIST 502
SKETCHES OF SPECIAL TOOLS 509
STARTING MOTOR ASSEMBLY 517
REMOVAL AND INSTALLATION 517
ALTERNATOR ASSEMBLY 518
REMOVAL AND INSTALLATION 518
ENGINE OIL COOLER ASSEMBLY 519
REMOVAL AND INSTALLATION 519
FUEL INJECTION PUMP ASSEMBLY 520
REMOVAL 520
INSTALLATION 522
WATER PUMP ASSEMBLY 523
REMOVAL AND INSTALLATION 523
NOZZLE HOLDER ASSEMBLY 524
REMOVAL AND INSTALLATION 524
TURBOCHARGER ASSEMBLY 525
REMOVAL AND INSTALLATION 525
THERMOSTAT ASSEMBLY 526
REMOVAL AND INSTALLATION 526
ENGINE FRONT SEAL 527
REMOVAL AND INSTALLATION 527
ENGINE REAR SEAL 528
REMOVAL 528
INSTALLATION 529
GOVERNOR MOTOR ASSEMBLY 532
REMOVAL AND INSTALLATION 532
CYLINDER HEAD ASSEMBLY 533
REMOVAL 533
INSTALLATION 537
AFTERCOOLER ASSEMBLY 540
REMOVAL AND INSTALLATION 540
HYDRAULIC COOLER ASSEMBLY 541
REMOVAL 541
INSTALLATION 542
RADIATOR, HYDRAULIC COOLER ASSEMBLY 543
REMOVAL 543
INSTALLATION 545
ENGINE, MAIN PUMP ASSEMBLY 546
REMOVAL 546
INSTALLATION 549
DAMPER ASSEMBLY 550
REMOVAL AND INSTALLATION 550
FUEL TANK ASSEMBLY 551
REMOVAL AND INSTALLATION 551
CENTER SWIVEL JOINT ASSEMBLY 552
REMOVAL AND INSTALLATION 552
DISASSEMBLY AND ASSEMBLY 553
FINAL DRIVE ASSEMBLY 554
REMOVAL AND INSTALLATION 554
DISASSEMBLY 555
ASSEMBLY 559
TRAVEL MOTOR ASSEMBLY 565
DISASSEMBLY 565
ASSEMBLY 570
SPROCKET 581
REMOVAL AND INSTALLATION 581
SWING MOTOR ASSEMBLY 582
REMOVAL AND INSTALLATION 582
DISASSEMBLY 583
ASSEMBLY 586
SWING MACHINERY ASSEMBLY 593
REMOVAL AND INSTALLATION 593
DISASSEMBLY 594
ASSEMBLY 598
REVOLVING FRAME ASSEMBLY 603
REMOVAL 603
INSTALLATION 604
SWING CIRCLE ASSEMBLY 605
REMOVAL AND INSTALLATION 605
IDLER, RECOIL SPRING ASSEMBLY 606
REMOVAL AND INSTALLATION 606
IDLER ASSEMBLY 607
DISASSEMBLY 607
ASSEMBLY 608
RECOIL SPRING ASSEMBLY 610
DISASSEMBLY 610
ASSEMBLY 611
TRACK ROLLER ASSEMBLY 612
REMOVAL AND INSTALLATION 612
DISASSEMBLY 613
ASSEMBLY 614
CARRIER ROLLER ASSEMBLY 616
REMOVAL AND INSTALLATION 616
DISASSEMBLY 617
ASSEMBLY 619
TRACK SHOE ASSEMBLY 621
REMOVAL AND INSTALLATION 621
HYDRAULIC TANK ASSEMBLY 622
REMOVAL 622
INSTALLATION 623
CONTROL PUMP ASSEMBLY 624
REMOVAL AND INSTALLATION 624
MAIN PUMP ASSEMBLY 625
REMOVAL 625
INSTALLATION 626
DISASSEMBLY 627
ASSEMBLY 633
MAIN PUMP INPUT SHAFT OIL SEAL 649
REMOVAL AND INSTALLATION 649
CONTROL VALVE ASSEMBLY 650
REMOVAL 650
INSTALLATION 652
DISASSEMBLY 653
ASSEMBLY 657
PUMP MERGE/DIVIDER VALVE ASSEMBLY 662
DISASSEMBLY AND ASSEMBLY 662
PRESSURE COMPENSATION VALVE ASSEMBLY 663
DISASSEMBLY AND ASSEMBLY 663
SERVO VALVE ASSEMBLY FOR FRONT PUMP 664
REMOVAL AND INSTALLATION 664
SERVO VALVE ASSEMBLY FOR REAR PUMP 665
REMOVAL AND INSTALLATION 665
LS-EPC SOLENOID VALVE ASSEMBLY 666
REMOVAL AND INSTALLATION 666
SOLENOID VALVE ASSEMBLY 667
REMOVAL AND INSTALLATION 667
WORK EQUIPMENT PPC VALVE ASSEMBLY 668
REMOVAL AND INSTALLATION 668
DISASSEMBLY 669
ASSEMBLY 670
TRAVEL PPC VALVE ASSEMBLY 671
REMOVAL AND INSTALLATION 671
DISASSEMBLY 672
ASSEMBLY 673
PPC SHUTTLE VALVE ASSEMBLY 674
REMOVAL 674
INSTALLATION 675
DISASSEMBLY 676
ASSEMBLY 677
BOOM LOCK VALVE ASSEMBLY 678
REMOVAL AND INSTALLATION 678
DISASSEMBLY AND ASSEMBLY 679
BOOM CYLINDER ASSEMBLY 680
REMOVAL 680
INSTALLATION 681
ARM CYLINDER ASSEMBLY 682
REMOVAL 682
INSTALLATION 683
BUCKET CYLINDER ASSEMBLY 684
REMOVAL 684
INSTALLATION 685
HYDRAULIC CYLINDER ASSEMBLY 686
DISASSEMBLY 686
ASSEMBLY 688
WORK EQUIPMENT ASSEMBLY 690
REMOVAL 690
INSTALLATION 691
BUCKET ASSEMBLY 692
REMOVAL 692
INSTALLATION 693
ARM ASSEMBLY 694
REMOVAL 694
INSTALLATION 695
BUCKET, ARM ASSEMBLY 696
REMOVAL 696
INSTALLATION 697
BOOM ASSEMBLY 698
REMOVAL 698
INSTALLATION 699
OPERATOR’S CAB ASSEMBLY 700
REMOVAL 700
INSTALLATION 701
COUNTERWEIGHT ASSEMBLY 702
REMOVAL AND INSTALLATION 702
AIR CONDITIONER COMPRESSOR ASSEMBLY 703
REMOVAL AND INSTALLATION 703
CONDENSER ASSEMBLY 704
REMOVAL AND INSTALLATION 704
AIR CONDITIONER UNIT ASSEMBLY 705
REMOVAL 705
INSTALLATION 706
GOVERNOR, PUMP CONTROLLER ASSEMBLY 707
REMOVAL AND INSTALLATION 707
MONITOR PANEL ASSEMBLY 708
REMOVAL AND INSTALLATION 708
CONTROL STAND CASE 709
REMOVAL 709
INSTALLATION 710
40 MAINTENANCE STANDARD 711
ENGINE MOUNT 712
SWING MACHINERY 713
SWING CIRCLE 715
FINAL DRIVE 716
SPROCKET 718
TRACK FRAME AND RECOIL SPRING 720
IDLER 721
CARRIER ROLLER 723
TRACK ROLLER 724
TRACK 725
HYDRAULIC PUMP 727
CONTROL PUMP AND RELIEF VALVE 728
CONTROL VALVE 729
SUCTION-SAFETY VALVE 735
SWING MOTOR 736
TRAVEL MOTOR 737
WORK EQUIPMENT, SWING PPC VALVE 738
TRAVEL PPC VALVE 739
SERVICE PPC VALVE 740
PPC SHUTTLE VALVE, TRAVEL JUNCTION VALVE 741
EPC SOLENOID VALVE 742
CENTER SWIVEL JOINT 743
BOOM HOLDING VALVE 744
HYDRAULIC CYLINDER 745
WORK EQUIPMENT 746
90 OTHERS 752
HYDRAULIC PIPING DIAGRAM (10-12) 753
HYDRAULIC CIRCUIT DIAGRAM (10-13) 754
CONTROL VALVE 755
10-SPOOL VALVE (10-38) 755
9-SPOOL VALVE (10-44) 756
8-SPOOL VALVE (10-45) 757
7-SPOOL VALVE (10-46) 758
OPERATION FOR EACH FUNCTION OF CLSS (10-52) 759
OPERATION OF WHOLE CLSS SYSTEM 760
1 WHEN ALL WORK EQUIPMENT IS AT NEUTRAL (10-72) 760
2 PUMP FLOW MERGED, BUCKET CURL OPERATED INDEPENDENTLY (10-74) 761
3 PUMP FLOW MERGED, BOOM RAISE OPERATED INDEPENDENTLY (10-76) 762
4 PUMP FLOW MERGED, ARM IN OPERATED INDEPENDENTLY (10-78) 763
5 PUMP FLOW MERGED, ARM OUT OPERATED INDEPENDENTLY (10-80) 764
6 PUMP FLOW DIVIDED, TRAVEL OPERATED INDEPENDENTLY (10-82) 765
7 PUMP FLOW MERGED, ARM IN + BOOM RAISE OPERATED SIMULTANEOUSLY (10-84) 766
8 PUMP FLOW MERGED, SWING + BOOM RAISE OPERATED SIMULTANEOUSLY (10-86) 767
9 PUMP FLOW DIVIDED (PUMP PRESSURE : 19 6 MPa (200 kg/cm2) OR ABOVE), TRAVEL + BOOM RAISE OPERATED SIMULTANEOUSLY (10-88) 768
10 PUMP FLOW DIVIDED (PUMP PRESSURE : 19 6 MPa (200 kg/cm2) OR ABOVE), TRAVEL + ARM IN OPERATED SIMULTANEOUSLY (10-90) 769
ACTUAL ELECTRIC WIRING DIAGRAM (10-138) 770
ACTUAL ELECTRIC WIRING DIAGRAM (10-139) 771
ELECTRIC CIRCUIT DIAGRAM (10-140) 772
ELECTRIC CIRCUIT DIAGRAM (10-141) 773
CONNECTOR ARRANGEMENT DIAGRAM (20-116) 774
CONTROL VALVE (40-20) 775

DESCRIPTION:

Komatsu PC400-6 PC400LC-6 PC450-6 PC450LC-6 Excavator Shop Manual SEBM006704 – PDF DOWNLOAD 

MACHINE MODEL    SERIAL NUMBER
PC400-6                          30001 and up
PC400LC-6                     30001 and up
PC450-6                         10001 and up
PC450LC-6                     10001 and up

GENERAL PRECAUTIONS :

Mistakes in operation are extremely dangerous. Read the OPERATION & MAINTENANCE MANUAL carefully BEFORE operating the machine.

PREPARATIONS FOR WORK:

PRECAUTIONS DURING WORK :

S.V 26/12/24