Komatsu PC400LC-6 EXCEL Hydraulic Excavator Shop Manual SEBM037200 PDF

Description

Komatsu PC400LC-6 EXCEL Hydraulic Excavator Shop Manual SEBM037200 – PDF DOWNLOAD

FILE DETAILS:

Komatsu PC400LC-6 EXCEL Hydraulic Excavator Shop Manual SEBM037200 – PDF DOWNLOAD 

Language : English
Pages : 632
Downloadable : Yes
File Type : PDF

TABLE OF CONTENTS:

Komatsu PC400LC-6 EXCEL Hydraulic Excavator Shop Manual SEBM037200 – PDF DOWNLOAD 

MACHINE MODEL     SERIAL NUMBER
PC400LC-6 EXCEL        32933 and up

COVER 1
CONTENTS 2
01 GENERAL 23
SPECIFICATION DRAWINGS 24
SPECIFICATIONS 25
WEIGHT TABLE 27
FUEL, COOLANT AND LUBRICANTS 29
10 STRUCTURE AND FUNCTION 31
PARTS RELATED TO ENGINE 32
RADIATOR, OIL COOLER 34
ENGINE CONTROL 35
POWER TRAIN 36
FINAL DRIVE 37
SWING CIRCLE 38
SWING MACHINERY 39
TRACK FRAME, RECOIL SPRING 40
TRACK SHOE 41
HYDRAULIC PIPING DRAWING 42
HYDRAULIC CIRCUIT DIAGRAM 44
HYDRAULIC TANK, HYDRAULIC FILTER 45
HYDRAULIC PUMP 46
CONTROL VALVE 63
SELF-REDUCING PRESSURE VALVE 71
SUCTION SAFETY VALVE 76
CLSS 77
SWING MOTOR 130
CENTER SWIVEL JOINT 134
TRAVEL MOTOR 136
VALVE CONTROL 145
WORK EQUIPMENT・SWING PPC VALVE 146
TRAVEL PPC VALVE 150
SERVICE PPC VALVE 154
PPC ACCUMULATOR 157
PPC SHUTTLE VALVE, TRAVEL JUNCTION VALVE 158
SOLENOID VALVE 165
BOOM HOLDING VALVE 167
WORK EQUIPMENT 170
AIR CONDITIONER 171
ACTUAL ELECTRIC WIRING DIAGRAM 172
ELECTRIC CIRCUIT DIAGRAM 176
ENGINE CONTROL SYSTEM 179
MACHINE MONITOR SYSTEM 185
20 TESTING AND ADJUSTING 190
STANDARD VALVE TABLE 191
STANDARD VALUE TABLE FOR ENGINE RELATED PARTS 191
STANDARD VALUE TABLE FOR CHASSIS RELATED PARTS 192
STANDARD VALUE TABLE FOR ELECTRICAL PARTS 200
TESTING AND ADJUSTING 203
TOOLS FOR TESTING, ADJUSTING, AND TROUBLESHOOTING 204
MEASURING ENGINE SPEED 205
MEASURING EXHAUST COLOR 206
ADJUSTING VALVE CLEARANCE 207
MEASURING COMPRESSION PRESSURE 208
MEASURING BLOW-BY PRESSURE 208
TESTING AND ADJUSTING FUEL INJECTION TIMING 209
MEASURING ENGINE OIL PRESSURE 211
TESTING AND ADJUSTING FAN BELT TENSION 212
TESTING AND ADJUSTING BELT TENSION FOR AIR CONDITIONER COMPRESSOR 212
ADJUSTING ENGINE SPEED SENSOR 213
MEASURING AIR SUPPLY PRESSURE (BOOST PRESSURE) 214
ADJUSTING FUEL CONTROL LEVER 215
TESTING AND ADJUSTING HYDRAULIC PRESSURE IN WORK EQUIPMENT, SWING, TRAVEL CIRCUIT 217
TESTING AND ADJUSTING TVC VALVE OUTPUT PRESSURE (SERVO PISTON INPUT PRESSURE) 220
TESTING AND ADJUSTING LS VALVE OUTPUT PRESSURE (SERVO PISTON INPUT PRESSURE) AND LS DIFFERENTIAL PRESSURE 222
MEASURING CONTROL CIRCUIT OIL PRESSURE (OIL PRESSURE WHEN SELF-PRESSURE IS REDUCED) 225
TESTING SOLENOID VALVE OUTPUT PRESSURE 226
MEASURING PPC VALVE OUTPUT PRESSURE AND TESTING PPC SHUTTLE VALVE 227
ADJUSTING WORK EQUIPMENT, SWING PPC VALVE 229
TESTING TRAVEL DEVIATION 230
TESTING LOCATIONS CAUSING HYDRAULIC DRIFT OF WORK EQUIPMENT 231
MEASURING OIL LEAKAGE 233
RELEASING REMAINING PRESSURE IN HYDRAULIC CIRCUIT 235
TESTING CLEARANCE OF SWING CIRCLE BEARING 236
TESTING WEAR OF SPROCKET 237
TESTING AND ADJUSTING TRACK SHOE TENSION 238
BLEEDING AIR 239
TROUBLESHOOTING 241
POINTS TO REMEMBER WHEN TROUBLESHOOTING 242
SEQUENCE OF EVENTS IN TROUBLESHOOTING 243
POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE 244
CHECKS BEFORE TROUBLESHOOTING 252
CONNECTOR TYPES AND MOUNTING LOCATIONS 253
CONNECTOR ARRANGEMENT DIAGRAM 255
CONNECTION TABLE FOR CONNECTOR PIN NUMBERS 258
METHOD OF USING TROUBLESHOOTING CHARTS 268
TROUBLESHOOTING OF ENGINE SYSTEM (S MODE) 270
METHOD OF USING TROUBLESHOOTING CHARTS 271
S-1 STARTING PERFORMANCE IS POOR (STARTING ALWAYS TAKES TIME) 275
S-2 ENGINE DOES NOT START 276
(1) ENGINE DOES NOT TURN 276
(2) ENGINE TURNS BUT NO EXHAUST SMOKE COMES OUT (FUEL IS NOT BEING INJECTED) 277
(3) EXHAUST SMOKE COMES OUT, BUT ENGINE DOES NOT START (FUEL IS BEING INJECTED) 278
S-3 ENGINE DOES NOT PICK UP SMOOTHLY (FOLLOW-UP IS POOR) 279
S-4 ENGINE STOPS DURING OPERATIONS 280
S-5 ENGINE DOES NOT ROTATE SMOOTHLY (HUNTING) 281
S-6 ENGINE LACKS OUTPUT (NO POWER) 282
S-7 EXHAUST SMOKE IS BLACK (INCOMPLETE COMBUSTION) 283
S-8 OIL CONSUMPTION IS EXCESSIVE (OR EXHAUST SMOKE IS BLUE) 284
S-9 OIL BECOMES CONTAMINATED QUICKLY 285
S-10 FUEL CONSUMPTION IS EXCESSIVE 286
S-11 OIL IS IN COOLING WATER, OR WATER SPURTS BACK, OR WATER LEVEL GOES DOWN 287
S-12 OIL PRESSURE CAUTION LAMP LIGHTS UP (DROP IN OIL PRESSURE) 288
S-13 OIL LEVEL RISES (WATER, FUEL IN OIL ) 289
S-14 WATER TEMPERATURE BECOMES TOO HIGH (OVERHEATING) 290
S-15 ABNORMAL NOISE IS MADE 291
S-16 VIBRATION IS EXCESSIVE 292
TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE) 293
JUDGEMENT TABLE FOR ELECTRICAL SYSTEM, MECHANICAL AND HYDRAULIC SYSTEM 294
E MODE ELECTRICAL SYSTEM DIAGRAM 296
PUMP REGULATOR LED DISPLAY 297
E-1 ERROR CODE DISPLAY PATTERN [1-1] (SHORT CIRCUIT IN TVC SOLENOID) IS DISPLAYED 298
E-2 ERROR CODE DISPLAY PATTERN [1-2] (DISCONNECTION IN TVC SOLENOID) IS DISPLAYED 299
E-3 ERROR CODE DISPLAY PATTERN [2-1] (ABNORMALITY IN MODEL SOLENOID) IS DISPLAYED 300
E-4 ERROR CODE DISPLAY PATTERN [2-2] (DISCONNECTION IN ENGINE SPEED SENSOR) IS DISPLAYED 301
E-5 ABNORMALITY IN PUMP TVC CONTROL SYSTEM 302
a) FUEL CONTROL LEVER IS NOT RETURNED TO STOP POSITION,BUT ENGINE STALLS,ENGINE STALLS WHEN SUDDEN LOAD IS APPLIED 302
b) NO POWER WHEN FUEL CONTROL LEVER IS AT FULL,WORK EQUIPMENT SPEED IS SLOW 302
E-6 ABNORMALITY IN PPC OIL PRESSURE LOCK SOLENOID SYSTEM 304
a) IS NOT ACTUATED (SAFETY LOCK IS NOT RELEASED) 304
b) REMAINS ACTUATED (SAFETY LOCK IS NOT APPLIED) 305
E-7 ABNORMALITY IN SWING LOCK SOLENOID SYSTEM 306
a) IS NOT ACTUATED (CANNOT SWING) 306
b) REMAINS ACTUATED (SWING CANNOT BE LOCKED) 307
E-8 STEERING IS DIFFICULT TO TURN (ABNORMALITY IN MERGE FLOW SOLENOID SYSTEM) 308
E-9 ABNORMALITY IN TRAVEL SPEED SOLENOID SYSTEM 311
a) TRAVEL SPEED DOES NOT CHANGE TO HI (TRAVEL SPEED STAYS IN LO) 311
b) TRAVEL SPEED DOES NOT CHANGE TO LO (TRAVEL SPEED STAYS IN HI) 312
E-10 ABNORMALITY IN ENGINE STARTING SYSTEM (ENGINE DOES NOT START) 313
TROUBLESHOOTING OF HYDRAULIC, MECHANICAL SYSTEM (H MODE) 315
TABLE OF FAILURE MODES AND CAUSES 316
H-1 SPEEDS OF ALL WORK EQUIPMENT, SWING, TRAVEL ARE SLOW OR LACK POWER 320
H-2 THERE IS EXCESSIVE DROP IN ENGINE SPEED, OR ENGINE STALLS 322
H-3 NO WORK EQUIPMENT, TRAVEL, SWING MOVE 323
H-4 ABNORMAL NOISE GENERATED (AROUND PUMP) 323
H-5 FINE CONTROL ABILITY IS POOR OR RESPONSE IS POOR 324
H-6 BOOM IS SLOW OR LACKS POWER 325
H-7 ARM IS SLOW OR LACKS POWER 327
H-8 BUCKET IS SLOW OR LACKS POWER 329
H-9 WORK EQUIPMENT (BOOM, ARM, BUCKET) DOES NOT MOVE (BUT TRAVEL AND SWING ARE NORMAL) 329
H-10 EXCESSIVE HYDRAULIC DRIFT (BOOM, ARM, BUCKET) 330
H-11 EXCESSIVE TIME LAG (ENGINE AT LOW IDLING) 331
H-12 OTHER EQUIPMENT MOVES WHEN SINGLE CIRCUIT IS RELIEVED 331
H-13 IN COMPOUND OPERATIONS, WORK EQUIPMENT WITH LARGER LOAD IS SLOW 331
H-14 IN SWING + BOOM RAISE, BOOM RAISE IS SLOW 332
H-15 IN SWING + ARM OUT, ARM OUT IS SLOW 332
H-16 IN SWING + TRAVEL, TRAVEL SPEED DROPS EXCESSIVELY 332
H-17 TRAVEL DEVIATION 333
H-18 TRAVEL SPEED IS SLOW 334
H-19 STEERING DOES NOT TURN EASILY OR LACKS POWER 336
H-20 TRAVEL SPEED DOES NOT SWITCH OR IS FASTER THAN SPECIFIED SPEED 338
H-21 TRAVEL DOES NOT MOVE (ONE SIDE ONLY) 338
H-22 DOES NOT SWING 339
H-23 SWING ACCELERATION IS POOR OR SWING SPEED IS SLOW 340
H-24 EXCESSIVE OVERRUN WHEN STOPPING SWING 342
H-25 EXCESSIVE SHOCK WHEN STOPPING SWING (ONE DIRECTION ONLY) 343
H-26 EXCESSIVE ABNORMAL NOISE WHEN STOPPING SWING 343
H-27 EXCESSIVE HYDRAULIC DRIFT OF SWING 344
TROUBLESHOOTING OF MACHINE MONITOR SYSTEM (M MODE) 345
MONITOR SYSTEM ELECTRICAL CIRCUIT DIAGRAM 346
M-1 WHEN THE STARTING SWITCH IS TURNED ON, NO DISPLAY IS GIVEN (LAMPS DO NOT LIGHT UP FOR 3 SECONDS) 347
M-2 WHEN STARTING SWITCH IS TURNED ON, LAMPS LIGHT UP FOR 3 SECONDS, BUT THEN DO NOT GO OUT 347
M-3 WHEN STARTING SWITCH IS TURNED ON, SOME LAMPS DO NOT LIGHT UP FOR 3 SECONDS 348
a) NO GAUGE LAMPS LIGHT UP (CAUTION LAMPS LIGHT UP) 348
b) SWING LOCK PREHEATING LAMPS DO NOT LIGHT UP (ALL GAUGE LAMPS LIGHT UP) 348
c) CHARGE CAUTION LAMP DOES NOT LIGHT UP 348
d) ENGINE OIL PRESSURE CAUTION LAMP DOES NOT LIGHT UP 348
M-4 WHEN POWER IS TURNED ON (BEFORE ENGINE IS STARTED), CHARGE CAUTION LAMP DOES NOT LIGHT UP 349
M-5 WHEN POWER IS TURNED ON (BEFORE ENGINE IS STARTED), ENGINE OIL PRESSURE CAUTION LAMP DOES NOT LIGHT UP 349
M-6 DURING PREHEATING, PREHEATING PILOT LAMP DOES NOT LIGHT UP 350
M-7 WHEN SWITCH IS OPERATED, SWING LOCK LAMP DOES NOT LIGHT UP 350
M-8 ENGINE OIL PRESSURE CAUTION LAMP LIGHTS UP WHEN ENGINE IS RUNNING (ENGINE OIL PRESSURE IS NORMAL) 351
M-9 CHARGE CAUTION LAMP LIGHTS UP WHEN ENGINE IS RUNNING 351
M-10 ABNORMALITY IN COOLANT TEMPERATURE GAUGE 352
a) AFTER ENGINE IS STARTED, LEVEL STAYS AT BOTTOM (WHITE RANGE) AND GOES NOT MOVE 352
b) AFTER ENGINE IS STARTED, LEVEL IMMEDIATELY RISES ENGINE IS NOT OVERHEATING BUT INDICATOR ENTERS RED RANGE 352
c) COOLANT TEMPERATURE GAUGE GOES OUT 352
M-11 ABNORMALITY IN FUEL GAUGE 353
a) ALL FUEL GAUGE SEGMENTS GO OUT 353
b) EVEN WHEN FUEL LEVEL GOES DOWN, FUEL GAUGE CONTINUES TO SHOW FULL 353
c) EVEN WHEN TANK IS FILLED, FUEL GAUGE DOES NOT SHOW FULL 353
M-12 DEFECTIVE OPERATION OF ALARM BUZZER 355
a) BUZZER DOES NOT SOUND 355
b) BUZZER CONTINUES TO SOUND AND DOES NOT STOP 355
M-13 ENGINE IS RUNNING, BUT SERVICE METER DOES NOT MOVE 356
a) CHARGE CAUTION LAMP LIGHTS UP 356
b) CHARGE CAUTION LAMP DOES NOT LIGHT UP 356
M-14 NIGHT LIGHTING DOES NOT LIGHT UP 357
a) GAUGE LIGHTING DOES NOT LIGHT UP 357
b) SERVICE METER LIGHTING DOES NOT LIGHT UP (SERVICE METER IS WORKING NORMALLY) 357
M-15 WIPER DOES NOT MOVE, OR DOES NOT STOP MOVING 358
a) WIPER DOES NOT MOVE WHEN WIPER SWITCH IS TURNED TO ON 358
b) WIPER MOVES EVEN WHEN WIPER SWITCH IS NOT TURNED TO ON 358
M-16 HEATER DOES NOT WORK 360
a) DOES NOT WORK AT EITHER HI OR LO 360
b) DOES NOT WORK AT LO ONLY 360
c) DOES NOT WORK AT HI ONLY 360
30 DISASSEMBLY AND ASSEMBLY 361
METHOD OF USING MANUAL 363
PRECAUTIONS WHEN CARRYING OUT OPERATION 365
SPECIAL TOOL LIST 367
SKETCHES OF SPECIAL TOOLS 372
STARTING MOTOR ASSEMBLY 377
REMOVAL AND INSTALLATION 377
ALTERNATOR ASSEMBLY 378
REMOVAL AND INSTALLATION 378
ENGINE OIL COOLER ASSEMBLY 379
REMOVAL AND INSTALLATION 379
FUEL INJECTION PUMP ASSEMBLY 380
REMOVAL 380
INSTALLATION 382
WATER PUMP ASSEMBLY 383
REMOVAL AND INSTALLATION 383
NOZZLE HOLDER ASSEMBLY 384
REMOVAL AND INSTALLATION 384
TURBOCHARGER ASSEMBLY 385
REMOVAL AND INSTALLATION 385
THERMOSTAT ASSEMBLY 386
REMOVAL AND INSTALLATION 386
ENGINE FRONT SEAL 387
REMOVAL AND INSTALLATION 387
ENGINE REAR SEAL 388
REMOVAL 388
INSTALLATION 389
CYLINDER HEAD ASSEMBLY 392
REMOVAL 392
INSTALLATION 396
AFTERCOOLER CORE ASSEMBLY 399
REMOVAL AND INSTALLATION 399
HYDRAULIC COOLER ASSEMBLY 400
REMOVAL 400
INSTALLATION 401
RADIATOR, HYDRAULIC COOLER ASSEMBLY 402
REMOVAL 402
INSTALLATION 404
ENGINE, MAIN PUMP ASSEMBLY 405
REMOVAL 405
INSTALLATION 408
DAMPER ASSEMBLY 409
REMOVAL AND INSTALLATION 409
FUEL TANK ASSEMBLY 410
REMOVAL AND INSTALLATION 410
CENTER SWIVEL JOINT ASSEMBLY 411
REMOVAL AND INSTALLATION 411
DISASSEMBLY AND ASSEMBLY 413
FINAL DRIVE ASSEMBLY 415
REMOVAL AND INSTALLATION 415
DISASSEMBLY 416
ASSEMBLY 420
TRAVEL MOTOR ASSEMBLY 426
DISASSEMBLY 426
ASSEMBLY 431
SPROCKET 442
REMOVAL AND INSTALLATION 442
SWING MOTOR ASSEMBLY 443
REMOVAL AND INSTALLATION 443
SWING MACHINERY ASSEMBLY 444
REMOVAL AND INSTALLATION 444
DISASSEMBLY 445
ASSEMBLY 449
REVOLVING FRAME ASSEMBLY 454
REMOVAL 454
INSTALLATION 455
SWING CIRCLE ASSEMBLY 456
REMOVAL AND INSTALLATION 456
IDLER, RECOIL SPRING ASSEMBLY 457
REMOVAL AND INSTALLATION 457
IDLER ASSEMBLY 458
DISASSEMBLY 458
ASSEMBLY 459
RECOIL SPRING ASSEMBLY 461
DISASSEMBLY 461
ASSEMBLY 462
TRACK ROLLER ASSEMBLY 463
REMOVAL AND INSTALLATION 463
DISASSEMBLY 464
ASSEMBLY 465
CARRIER ROLLER ASSEMBLY 467
REMOVAL AND INSTALLATION 467
DISASSEMBLY 468
ASSEMBLY 470
TRACK SHOE ASSEMBLY 472
REMOVAL AND INSTALLATION 472
HYDRAULIC TANK ASSEMBLY 473
REMOVAL 473
INSTALLATION 474
MAIN PUMP ASSEMBLY 475
REMOVAL 475
INSTALLATION 476
DISASSEMBLY 477
ASSEMBLY 483
MAIN PUMP INPUT SHAFT OIL SEAL 498
REMOVAL AND INSTALLATION 498
CONTROL VALVE ASSEMBLY 499
REMOVAL 499
INSTALLATION 501
DISASSEMBLY 502
ASSEMBLY 508
PUMP MERGE/DIVIDER VALVE ASSEMBLY 515
DISASSEMBLY AND ASSEMBLY 515
PRESSURE COMPENSATION VALVE ASSEMBLY 516
DISASSEMBLY AND ASSEMBLY 516
SERVO VALVE ASSEMBLY FOR FRONT PUMP 517
REMOVAL AND INSTALLATION 517
SERVO VALVE ASSEMBLY FOR REAR PUMP 518
REMOVAL AND INSTALLATION 518
SOLENOID VALVE ASSEMBLY 519
REMOVAL AND INSTALLATION 519
WORK EQUIPMENT PPC VALVE ASSEMBLY 520
REMOVAL AND INSTALLATION 520
DISASSEMBLY 521
ASSEMBLY 522
TRAVEL PPC VALVE ASSEMBLY 523
REMOVAL AND INSTALLATION 523
DISASSEMBLY 524
ASSEMBLY 525
PPC SHUTTLE VALVE ASSEMBLY 526
REMOVAL 526
INSTALLATION 527
DISASSEMBLY 528
ASSEMBLY 529
BOOM LOCK VALVE ASSEMBLY 530
REMOVAL AND INSTALLATION 530
DISASSEMBLY AND ASSEMBLY 531
BOOM CYLINDER ASSEMBLY 532
REMOVAL 532
INSTALLATION 533
ARM CYLINDER ASSEMBLY 534
REMOVAL 534
INSTALLATION 535
BUCKET CYLINDER ASSEMBLY 536
REMOVAL 536
INSTALLATION 537
HYDRAULIC CYLINDER ASSEMBLY 538
DISASSEMBLY 538
ASSEMBLY 541
WORK EQUIPMENT ASSEMBLY 545
REMOVAL 545
INSTALLATION 546
BUCKET ASSEMBLY 547
REMOVAL 547
INSTALLATION 548
ARM ASSEMBLY 549
REMOVAL 549
INSTALLATION 550
BUCKET, ARM ASSEMBLY 551
REMOVAL 551
INSTALLATION 552
BOOM ASSEMBLY 553
REMOVAL 553
INSTALLATION 554
OPERATOR’S CAB ASSEMBLY 555
REMOVAL 555
INSTALLATION 556
MONITOR PANEL ASSEMBLY 557
REMOVAL AND INSTALLATION 557
COUNTERWEIGHT ASSEMBLY 558
REMOVAL AND INSTALLATION 558
AIR CONDITIONER COMPRESSOR ASSEMBLY 559
REMOVAL AND INSTALLATION 559
CONDENSER ASSEMBLY 560
REMOVAL AND INSTALLATION 560
RECEIVER TANK ASSEMBLY 561
REMOVAL AND INSTALLATION 561
AIR CONDITIONER UNIT ASSEMBLY 562
REMOVAL 562
INSTALLATION 563
40 MAINTENANCE STANDARD 564
ENGINE MOUNT 565
SWING MACHINERY 566
SWING CIRCLE 568
FINAL DRIVE 569
TRACK FRAME AND RECOIL SPRING 571
IDLER 572
CARRIER ROLLER 574
TRACK ROLLER 575
TRACK SHOE 576
HYDRAULIC PUMP 580
CONTROL VALVE 581
SELF-REDUCING PRESSURE VALVE 588
SUCTION-SAFETY VALVE 589
SWING MOTOR 590
TRAVEL MOTOR 591
WORK EQUIPMENT・SWING PPC VALVE 592
TRAVEL PPC VALVE 593
SERVICE PPC VALVE 594
PPC SHUTTLE VALVE, TRAVEL JUNCTION VALVE 595
SOLENOID VALVE 596
CENTER SWIVEL JOINT 597
BOOM HOLDING VALVE 599
HYDRAULIC CYLINDER 600
WORK EQUIPMENT 602
DIMENSIONS OF WORK EQUIPMENT 604
70 SUPPLEMENT FOR PIPE UNDERSIDE SOIL EXCAVATION MACHINE 608
1 SPECIFICATION DRAWINGS 609
2 SPECIFICATIONS 612
3 TESTING AND ADJUSTING 614
4 TROUBLESHOOTING 617
(1) GENERAL VIEW OF CONTROL LEVERS AND SWITCHES 617
(2) ALLOCATION OF MAIN CONTROL VALVE 617
(3) ALLOCATION OF SOLENOID VALVE 618
(4) LOCATION OF SAFETY AND SUCTION VALVES FOT CUTTER MOTOR ROTATION 618
(5) LOCATION OF MAIN COMPONENTS ON PUEE 619
(6) DIAGNOSTIC TREE FOR TROUBLESHOOTING 620
1) CUTTER DOES NOT ROTATE 620
2) CUTTER ROTATION HAS POOR SPEED OR LACKS OF POWER 621
3) DOES NOT OPEN OF CLOSE CUTTERS 622
4) CUTTER OPENING AND CLOSING SPEED IS POOR, OR LACKS OF POWER 623
5) DOES NOT PROPEL CUTTERS 624
6) PROPELLING CUTTER SPEED IS POOR, OR LACKS OF POWER 624
7) DOES NOT CLAMP PIPE 625
8) CLAMPING SPEED IS POOR, OR LACK OF POWER 626
9) CLAMP OPERATING SWITCH DOES NOT WORK 627
5 MAINTENANCE STANDARD 628
90 OTHERS 629
HYDRAULIC CIRCUIT DIAGRAM 630
ELECTRIC CIRCUIT DIAGRAM (1/2) 631
ELECTRIC CIRCUIT DIAGRAM (2/2) 632

DESCRIPTION:

Komatsu PC400LC-6 EXCEL Hydraulic Excavator Shop Manual SEBM037200 – PDF DOWNLOAD 

MACHINE MODEL     SERIAL NUMBER
PC400LC-6 EXCEL        32933 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