Komatsu WA900-1 Wheel Loader Shop Manual CEBM002300 – PDF DOWNLOAD

Description

Komatsu WA900-1 Wheel Loader Shop Manual CEBM002300 – PDF DOWNLOAD

FILE DETAILS:

Komatsu WA900-1 Wheel Loader Shop Manual CEBM002300 – PDF DOWNLOAD

Language : English
Pages : 878
Downloadable : Yes
File Type : PDF

IMAGES PREVIEW OF THE MANUAL:

TABLE OF CONTENTS:

Komatsu WA900-1 Wheel Loader Shop Manual CEBM002300 – PDF DOWNLOAD

• SERIAL NUMBERS VVA90041C – A20008 and up

MAIN MENU 0
CONTENTS 2
01 GENERAL 21
SPECIFICATION DRAWINGS 22
SPECIFICATIONS 23
WEIGHT TABLE 26
FUEL, COOLANT, AND LUBRICANTS 28
ENGINE OIL SPECIFICATIONS 29
DIESEL FUEL SPECIFICATIONS 30
COOLANT SPECIFICATIONS 31
10 STRUCTURE AND FUNCTION 39
GENERAL (POWER TRAIN) 44
POWER TRAIN SYSTEM 45
ENGINE CONTROL 46
RADIATOR AND HYDRAULIC OIL COOLER 47
DAMPER 48
TORQUE CONVERTER AND TRANSMISSION PIPING 49
TRANSMISSION HYDRAULIC SYSTEM DIAGRAM 50
TRANSMISSION HYDRAULIC CIRCUIT DIAGRAM 51
TORQUE CONVERTER 52
TORQUE CONVERTER RELIEF VALVE 55
TORQUE CONVERTER REGULATOR VALVE 56
TORQUE CONVERTER OIL FILTER 57
TRANSMISSION 59
CLUTCH 62
OUTLINE 62
OPERATION OF CLUTCH 62
FORWARD 1st 63
FORWARD 2nd 64
FORWARD 3rd 65
REVERSE 1st 66
TRANSFER 67
TRANSMISSION CONTROL VALVE 68
TRANSMISSION SOLENOID VALVE 69
LOWER VALVE 70
UPPER VALVE 71
PILOT OIL FILTER 72
MAIN RELIEF VALVE 73
PILOT REDUCING VALVE 74
TRANSMISSION SOLENOID VALVE 75
PRIORITY VALVE 76
MODULATING VALVE AND QUICK RETURN VALVE 77
REDUCING VALVE 79
EMERGENCY MANUAL SPOOL 80
TRANSMISSION LUBRICATION VALVE 81
HYDRAULIC CIRCUIT SCHEMATICS 82
TORQUE CONVERTER OIL COOLER 84
DRIVE SHAFT 85
CENTER SUPPORT 86
AXLES 87
FRONT AXLE 87
FRONT DIFFERENTIAL 88
REAR AXLE 89
REAR DIFFERENTIAL 90
FINAL DRIVE 92
FLOOR SUPPORT 93
AXLE MOUNT AND CENTER HINGE PIN 94
STEERING PIPING 96
STEERING COLUMN 97
STEERING PUMP 98
SWITCH PUMP 101
SWITCH PUMP (HPV 90 + 90) 102
CD – NC VALVE 104
STEERING DEMAND VALVE 106
OVERLOAD RELIEF VALVE 107
MAIN RELIEF VALVE 109
OPERATION OF STEERING RELIEF VALVE 110
OPERATION OF DEMAND VALVE 111
When steering spool is at neutral 111
WHEN STEERING SPOOL IS OPERATED 112
Engine running at low speed 112
Engine running at high speed 113
OPERATION OF STEERING VALVE 114
Neutral 114
Turning left 115
Turning right 116
TWO-WAY RESTRICTOR VALVE 117
STEERING UNIT (ORBIT-ROLL VALVE) 118
OPERATION 120
When turning 120
At neutral 120
DIVERTER VALVE 121
EMERGENCY STEERING RELIEF VALVE 122
HYDRAULIC CIRCUIT SCHEMATICS FOR EMERGENCY STEERING 123
Pump, engine working normally 123
Failure in pump or engine when machine is traveling 124
BRAKE AND AIR PIPING 126
BRAKE AND AIR CIRCUIT DIAGRAM 128
AIR GOVERNOR 130
AIR TANK 132
SAFETY VALVE 132
BRAKE VALVE 134
BRAKE ACTUATED 135
OPERATING IN BALANCE 136
BRAKE RELEASED 137
RELAY VALVE 138
TWO-WAY VALVE 139
BRAKE CHAMBER 140
SLACK ADJUSTER 142
BRAKE 145
PARKING BRAKE 146
HYDRAULIC PIPING 148
WORK EQUIPMENT HYDRAULIC CIRCUIT DIAGRAM 150
WORK EQUIPMENT LEVER LINKAGE 151
HYDRAULIC TANK 152
OIL FILTER BYPASS VALVE 153
BREATHER 153
MAIN PISTON PUMP 155
PISTON PUMP (HPV90 + 90) 156
CONTROL PUMP (BAR025) 160
RELIEF VALVE 161
ES VALVE (ENGINE SENSING VALVE) 162
SERVO VALVE 165
PPC VALVE 168
PPC RELIEF VALVE 172
ACCUMULATOR 173
MAIN CONTROL VALVE 174
RELIEF VALVE 176
SAFETY VALVE (with suction valve) 177
AS A SAFETY VALVE 177
AS A SUCTION VALVE 178
SUCTION VALVE 178
FLOAT SELECTOR VALVE AND UNLOADER VALVE 179
OPERATION OF HYDRAULIC CIRCUIT 181
LIFT AND DUMP SPOOLS IN “HOLD” 181
LIFT SPOOL IN “RAISE” 182
LIFT SPOOL IN “LOWER” 183
LIFT SPOOL IN “FLOAT” 184
DUMP SPOOL IN “DUMP” 185
DUMP SPOOL IN “TILT BACK” 186
LUBRICATION OF WORK EQUIPMENT 188
WORK EQUIPMENT LINKAGE 190
BUCKET POSITIONER AND BOOM KICK-OUT 192
BUCKET POSITIONER 193
BOOM KICK-OUT 193
OPERATION OF PROXIMITY SWITCH 194
CAB 198
AIR CONDITIONER 199
AIR CONDITIONING (GENERAL) 200
BASIC INFORMATION ON AIR CONDITIONERS 200
PRINCIPLE OF COOLING 203
REFRIGERANTS 208
SAFETY PRECAUTIONS 208
REFRIGERATOR OIL (LUBE OIL) 209
AIR CONDITIONING PIPING DIAGRAM 210
AIR CONDITIONING CONDENSER 211
RECEIVER W/SIGHT GLASS (LIQUID TANK) 213
AIR CONDITIONER UNIT 215
MACHINE MONITOR SYSTEM 216
ELECTRONIC VEHICLE MONITORING SYSTEM (EVMS) 216
INDICATION ON MONITOR PANEL 218
MONITOR WIRING HARNESS 221
ELECTRICAL CIRCUIT SYSTEM 227
ELECTRICAL SCHEMATIC (1/3) 228
ELECTRICAL SCHEMATIC (2/3) 229
ELECTRICAL SCHEMATIC – JOYSTICK STEERING (3/3) 230
ENGINE STARTING CIRCUIT 232
ENGINE STOP CIRCUIT 234
PREHEATING CIRCUIT 236
PREHEATING AND POST-HEATING USING PREHEATING SWITCH 236
PREHEATING WITH STARTING SWITCH 237
AUTOMATIC PREHEATING 238
ELECTRICAL TRANSMISSION CONTROL 240
COMBINATION SWITCH 241
TRANSMISSION CUT-OFF SELECTOR SWITCH 242
TRANSMISSION CUT-OFF ELECTRIC CIRCUIT 243
NEUTRALIZER RELAY ELECTRIC CIRCUIT 244
KICK-DOWN SWITCH 245
KICK-DOWN ELECTRIC CIRCUIT 246
Normally ON 246
When kick-down switch is operated 247
Cancellation of kick-down switch I 248
Cancellation of kick-down switch II 249
Cancellation of kick-down switch III 250
ELECTRICAL PARKING BRAKE CONTROL 251
STARTING SWITCH OFF 254
STARTING SWITCH ON 255
When parking brake switch is turned ON, before starting switch is turned ON 255
Parking brake OFF (released), after starting switch is turned ON 256
Parking brake switch turned OFF (released), before starting switch is turned ON 257
Parking brake switch on (operated) 258
When air pressure drops (emergency brake actuated) 259
TRANSMISSION CLUTCH OVERRUN CONTROLLER 260
ENGINE DIAGNOSTICS 262
EXPLANATION OF THE THREE ENGINE DIAGNOSTIC LIGHTS 262
ENGINE FAULT DIAGNOSTICS 263
FAULT CODES 264
ENGINE DIAGNOSTIC ELECTRICAL SCHEMATIC 267
20 TESTING, ADJUSTING AND TROUBLESHOOTING 269
TESTING AND ADJUSTING 274
STANDARD VALUE FOR TABLE ENGINE 275
STANDARD VALUE TABLE FOR CHASSIS 276
STANDARD VALUE TABLE FOR ELECTRICAL SYSTEM 279
TOOLS FOR TESTING, ADJUSTING AND TROUBLESHOOTING 282
MEASURING ENGINE PERFORMANCE 283
ENGINE SPEEDS 283
ENGINE RATING 283
INTAKE MANIFOLD PRESSURE 283
INTAKE AIR RESTRICTION 283
LUBRICATING OIL PRESSURE 283
FUEL FILTER INLET RESTRICTION 283
BLOW-BY PRESSURE 283
EXHAUST BACK PRESSURE 283
COOLANT TEMPERATURE 283
VALVE CLEARANCE 283
EXHAUST GAS COLOR 283
ENGINE DRIVE BELT TENSION 283
MEASURING ENGINE STALL SPEEDS 284
MEASURING TORQUE CONVERTER STALL 284
MEASURING HYDRAULIC STALL 285
MEASURING FULL STALL 285
MEASURING ACCELERATOR PEDAL 286
OPERATING FORCE 286
OPERATING ANGLE 286
MEASURING DIRECTIONAL AND SPEED LEVER 287
MEASURING OPERATING FORCE OF LEVER 287
MEASURING TRAVEL OF LEVER 287
MEASURING OIL PRESSURE OF TRANSMISSION AND TORQUE CONVERTER 288
TRANSMISSION MAIN RELIEF VALVE PRESSURE 289
MEASURING PILOT REDUCING PRESSURE 289
MEASURING MODULATING PRESSURE 289
TORQUE CONVERTER INLET PRESSURE 289
TORQUE CONVERTER OUTLET PRESSURE 289
MEASURING LUBRICATION VALVE PRESSURE 289
MEASURING REDUCING VALVE PRESSURE 289
METHOD FOR OPERATION OF EMERGENCY MANUAL SPOOL 291
WHEEL, TIRE 293
MEASURING STEERING WHEEL PERFORMANCE 294
MEASURING STEERING WHEEL PLAY 294
MEASURING OPERATING FORCE OF STEERING WHEEL 295
MEASURING OPERATING TIME FOR STEERING WHEEL 295
MEASURING STEERING OIL PRESSURE 296
MEASURING MAIN RELIEF PRESSURE 296
MEASURING EMERGENCY STEERING PRESSURE 297
ADJUSTING JOYSTICK STEERING 299
ADJUSTING STOPPER BOLT (FOR STOP VALVE) 299
ADJUSTING JOYSTICK LEVER POTENTIOMETER 300
ADJUSTING JOYSTICK LEVER NEUTRAL DETECTION SWITCH 301
MEASURING BRAKE PEDAL 302
MEASURING AIR PRESSURE 303
TESTING BRAKE PERFORMANCE 305
CHECKING BRAKE PISTON LEAKAGE 306
MEASURING WEAR OF BRAKE DISC 307
BLEEDING AIR FROM BRAKE SYSTEM 308
TESTING PARKING BRAKE PERFORMANCE 309
CHECKING AND ADJUSTING PARKING BRAKE 310
MEASURING DUMP AND LIFT CONTROL LEVERS 312
MEASURING WORK EQUIPMENT HYDRAULIC PRESSURE 314
AIR BLEEDING FROM PISTON PUMP 317
MEASURING WORK EQUIPMENT 318
MEASURING WORK EQUIPMENT HYDRAULIC DRIFT 319
ADJUSTING BUCKET POSITIONER 320
ADJUSTING BOOM KICK-OUT 321
ADJUSTING MACHINE MONITOR (SPEEDOMETER MODULE) 322
TROUBLESHOOTING 323
POINTS TO REMEMBER WHEN TROUBLESHOOTING 324
SEQUENCE OF EVENTS IN TROUBLESHOOTING 325
PRECAUTIONS WHEN CARRYING OUT MAINTENANCE 326
PRECAUTIONS WHEN HANDLING ELECTRIC EQUIPMENT 326
POINTS TO REMEMBER WHEN TROUBLESHOOTING ELECTRIC CIRCUITS 331
POINTS TO REMEMBER WHEN HANDLING HYDRAULIC EQUIPMENT 332
CHECKS BEFORE TROUBLESHOOTING 334
HANDLING CONNECTORS 335
PRECAUTIONS WHEN TROUBLESHOOTING 336
PREVENTING RECURRENCE OF TROUBLE 338
METHOD OF USING TROUBLESHOOTING CHARTS 339
Category of troubleshooting code number 339
Method of using troubleshooting table for each troubleshooting mode 339
Using troubleshooting chart for engine related failure 341
JUDGEMENT ON POWER TRAIN 347
Judgement flow 347
Testing and inspection of transmission solenoid 347
Checking directional solenoid circuit 347
Checking speed solenoid circuit 289
CONNECTOR TYPES AND MOUNTING LOCATIONS 349
CONNECTOR ARRANGEMENT DIAGRAM 352
CONNECTION TABLE FOR CONNECTOR PIN NUMBERS 354
TROUBLESHOOTING OF ENGINE SYSTEM (S MODE) 361
S-1 STARTING PERFORMANCE IS POOR (Starting always takes time) 362
S-2 Engine does not start 363
Engine does not turn 363
Engine turns but no exhaust gas comes out (Fuel is not being injected) 364
Exhaust gas comes out but engine does not start (Fuel is being ejected) 365
S-3 Engine does not pick up smoothly (Follow up is poor) 366
S-4 Engine stops during operations 367
S-5 Engine does not rotate smoothly (hunting) 368
S-6 Engine lacks output (no power) 369
S-7 Exhaust gas is black (incomplete combustion) 370
S-8 Oil consumption is excessive (or exhaust gas is blue) 371
S-9 Oil becomes contaminated quickly 372
S-10 Fuel consumption is excessive 373
S-11 Oil is in cooling water, or water spurts back, or water level goes down 374
S-12 Oil pressure lamp lights up (drop in oil pressure) 375
S-13 Oil level rises 376
S-14 Water temperature becomes too high 377
S-15 Abnormal noise is made 378
S-16 Vibration is excessive 379
TROUBLESHOOTING OF ENGINE, TRANSMISSION, PARKING BRAKE ELECTRIC SYSTEM (E MODE) 381
ELECTRICAL CIRCUIT SYSTEM 382
ENGINE STARTING CIRCUIT SYSTEM 382
ENGINE STOP CIRCUIT SYSTEM 383
TRANSMISSION CONTROL, PARKING BRAKE CIRCUIT SYSTEM 384
PREHEATING CIRCUIT SYSTEM 385
E-1 Engine does not start 386
E-2 Engine does not stop 390
E-2 Engine stops when traveling 390
E-4 Parking brake does not work 391
E-5 Parking brake is not released 392
E-6 Parking brake is released when starting switch is turned ON 394
E-7 Parking brake is applied, transmission (Parking brake is working normally) does not enter neutral 394
E-8 Transmission does not work normally 395
E-9 Kick-down switch does not work (1/2) 416
E-9 Kick-down switch does not work (2/2) 418
E-10 Kick-down only works when kick-down switch is ON (Kick-down switch relay does not carry out self-hold operation) 419
E-11 Kick-down operation is not canceled 420
E-12 Kick-down works mistake when traveling in F2 422
E-13 Machine does not travel when kick-down switch is pressed 422
E-14 Preheating is not carried out 424
E-15 Preheating stays ON 428
TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (M MODE) 433
ELECTRICAL CIRCUIT SYSTEM (MACHINE MONITOR SYSTEM) 435
ELECTRICAL CIRCUIT SYSTEM 436
M-1 BRAKE OIL LEVEL flashes when engine is stopped 438
M-2 ENGINE OIL LEVEL flashes when engine is stopped 438
M-3 RADIATOR COOLANT LEVEL flashes when engine is stopped 440
M-4 BATTERY CHARGE flashes when engine is running 440
M-5 TRANSMISSION OIL FILTER CLOGGING flashes when engine is running 442
M-6 FUEL LEVEL flashes when engine is running 444
M-7 BRAKE LINE FAILURE flashes when engine is running 444
M-8 ENGINE OIL PRESSURE flashes when engine is running 446
M-9 FUEL LEVEL flashes when engine is running 446
M-10 DROP IN AIR PRESSURE flashes when engine is running 448
M-11 ENGINE COOLANT TEMPERATURE flashes when engine is running 448
M-12 TORQUE CONVERTER OIL TEMPERATURE flashes when engine is running 448
M-13 PARKING BRAKE lights up abnormally, or does not light up 450
M-14 WORKING LAMP lights up abnormally, or does not light up 452
M-15 PREHEATING lights up, or does not light up 454
M-16 MAIN STEERING FAILURE lights up, or does not light up 456
M-17 TRANSMISSION CUT-OFF lights up, or does not light up 458
M-18 Turn signal Hi beam light up, or does not light up 460
M-19 Turn signal does not flash even when hazard switch is turned ON 466
M-20 Speedometer display does not work normally 468
M-21 Hour meter does not work normally 469
M-22 When starting switch is turned ON, monitor panel does not work, or only part works 470
M-23 When starting switch is turned ON, all monitor panel does not go out lights up, but 471
M-24 ENGINE OIL PRESSURE flashes or BATTERY CHARGE flashes when engine is stopped 472
M-25 ENGINE OIL PRESSURE flashes or BATTERY CHARGE flashes when engine is stopped 475
M-26 When starting switch is turned to ON position (engine stopped), buzzer does not 480
M-27 No abnormality is shown on monitor display, but alarm buzzer sounds 480
M-28 When starting switch is turned to ON position (engine stopped), warning lamp does light up for 2 seconds CAUTION item 482
M-29 No abnormality is shown on monitor display, warning lamp lights up 483
M-30 Abnormality in fuel gauge 484
M-31 Abnormality in air pressure gauge 485
M-32 Abnormality in engine coolant temperature gauge 486
M-33 Abnormality in torque converter oil temperature gauge 488
TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (T MODE) 489
POWER TRAIN 490
T-1 Machine does not move 490
T-2 Machine lacks power or speed 491
T-3 Excessive time lag when starting machine or shifting gear 492
T-4 Torque converter oil temperature too high 493
STEERING SYSTEM 494
T-5 Steering wheel does not turn 494
T-6 Steering wheel is sluggish 495
T-7 Steering wheel moves unsteadily or is subjected to large shock 496
T-8 Machine tends to turn naturally in one particular direction when traveling 496
BRAKE SYSTEM 497
T-9 Air pressure does not rise at all 497
T-10 Air pressure does not rise to the specified range 498
T-11 Brake is ineffective or not very effective 499
T-12 Brake does not release, or drags 500
T-13 Parking brake does not release, or drags 501
WORK EQUIPMENT 502
T-14 Lift arm does not rise 502
T-15 Lift arm moves slowly or does not have sufficient lifting power 503
T-16 Lift arm movement becomes slow after it reaches a certain height 504
T-17 Bucket cannot be held down with lift arm cylinder 504
T-18 Lift arm has large hydraulic drift 504
T-19 Lift arm movement is unsteady during work 505
T-20 Lift arm lowers momentarily when control lever is shifted from “Hold” to “Raise” 505
T-21 Bucket does not tilt back 506
T-22 Bucket moves slowly or has insufficient tilt-back power 507
T-23 Bucket movement becomes slow during tilt back 508
T-24 Bucket cannot be held down by the bucket cylinder 508
T-25 Bucket has large hydraulic drift 508
T-26 Bucket moves unsteadily when machine travels under load (Main control valve in “Hold”) 509
T-27 Bucket dumps momentarily when control lever is shifted from “Hold” to “Tilt back” 509
T-28 Control levers of lift arm and dump move stiffly and sluggishly 510
TROUBLESHOOTING OF JOYSTICK STEERING (J MODE) 511
FUNCTION 512
TROUBLESHOOTING 512
TABLE OF FAILURE CODES 512
TABLE OF FAILURE MODES AND CAUSES 513
J-1 FAILURE CODE [12] ABNORMALITY IN TRANSMISSION F RELAY SYSTEM 514
J-2 FAILURE CODE [13] ABNORMALITY IN TRANSMISSION R RELAY SYSTEM 515
J-3 FAILURE CODE [18] ABNORMALITY IN TRANSMISSION R RELAY SYSTEM 516
J-4 FAILURE CODE [12] ABNORMALITY IN CAUTION LAMP SYSTEM 517
J-5 FAILURE CODE [25] ABNORMALITY IN JOYSTICK STEERING F, N, R SIGNAL SYSTEM 518
J-6 FAILURE CODE [30] DISCONNECTION IN STEERING R H STEERING SOLENOID 519
J-7 FAILURE CODE [31] SHORT ClRCUIT IN STEERING R H STEERING SOLENOID 520
J-8 FAILURE CODE [32] DISCONNECTION IN L H STEERING SOLENOID 521
J-9 FAILURE CODE [33] SHORT CIRCUIT IN STEERING L H STEERING SOLENOID 522
J-10 FAILURE CODE [34] ABNORMALITY IN STEERING SOLENOID CUT RELAY SYSTEM 523
J-11 FAILURE CODE [36] ABNORMALITY IN JOYSTICK STEERING NEUTRAL SIGNAL SYSTEM 524
J-12 FAILURE CODE [37] ABNORMALITY IN JOYSTICK STEERING LEVER POTENTIOMETER 525
J-13 FAILURE CODE [38] ABNORMALITY IN MODEL SELECTION WIRING HARNESS 526
J-14 FAILURE CODE [39] ABNORMALITY IN POWER SOURCE VOLTAGE 527
J-15 ABNORMALITY IN JOYSTICK STEERING ON-OFF SIGNAL SYSTEM 528
J-16 ABNORMALITY IN TRANSMISSION F SOLENOID SYSTEM 529
J-17 ABNORMALITY IN TRANSMISSION R SOLENOID SYSTEM 530
J-18 ABNORMALITY IN TRANSMISSION N SOLENOID SYSTEM 531
J-19 DISCONNECTION IN JOYSTICK STEERING F SWITCH SYSTEM 532
J-20 DISCONNECTION IN JOYSTICK STEERING R SWITCH SYSTEM 533
J-21 DISCONNECTION IN JOYSTICK STEERING N SWITCH SYSTEM 534
TROUBLESHOOTING OF AIR CONDITIONING 535
AIR CONDITIONER / HEATER (EAGLE) 536
TROUBLESHOOTING 536
WIRING DIAGRAM 540
30 DISASSEMBLY AND ASSEMBLY 541
METHOD OF USING MANUAL 546
When removing or installing unit assemblies 546
General precautions 546
Listing of special tools 546
PRECAUTIONS WHEN CARRYING OUT OPERATION 547
Precautions when carrying out removal work 547
Precautions when carrying out installation work 548
Precautions when completing the operations 549
RADIATOR 550
REMOVAL 550
INSTALLATION 553
ENGINE 556
REMOVAL 556
INSTALLATION 562
DAMPER 568
REMOVAL 568
INSTALLATION 571
DISASSEMBLY 574
ASSEMBLY 576
TORQUE CONVERTER, TRANSMISSION 580
REMOVAL 580
INSTALLATION 586
TORQUE CONVERTER ASSEMBLY 593
DISASSEMBLY 593
ASSEMBLY 597
TORQUE CONVERTER VALVE ASSEMBLY 602
DISASSEMBLY 602
ASSEMBLY 602
PTO ASSEMBLY 603
DISASSEMBLY 603
ASSEMBLY 605
TRANSMISSION 608
DISASSEMBLY 608
FINE DISASSEMBLY OF ROTATING CLUTCH ASSEMBLY 621
ASSEMBLY 623
FINE ASSEMBLY OF ROTATING CLUTCH ASSEMBLY 623
TRANSFER ASSEMBLY 639
DISASSEMBLY 639
ASSEMBLY 647
TRANSMISSION VALVE 657
REMOVAL 657
INSTALLATION 657
TRANSMISSION VALVE 657
UPPER VALVE ASSEMBLY 658
DISASSEMBLY 659
ASSEMBLY 659
LOWER VALVE ASSEMBLY 660
DISASSEMBLY 660
ASSEMBLY 660
RELIEF VALVE ASSEMBLY 661
CENTER SUPPORT 662
REMOVAL 662
INSTALLATION 663
DISASSEMBLY 665
ASSEMBLY 667
DRIVE SHAFT 670
DISASSEMBLY 670
ASSEMBLY 672
FRONT AXLE 674
REMOVAL 674
INSTALLATION 676
REAR AXLE 678
REMOVAL 678
INSTALLATION 684
DIFFERENTIAL 691
REMOVAL 691
INSTALLATION 693
DISASSEMBLY 696
ASSEMBLY 699
FINAL DRIVE 705
DISASSEMBLY 705
ASSEMBLY 708
STEERING UNIT 711
REMOVAL 711
INSTALLTION 712
STEERING DEMAND VALVE 713
REMOVAL 713
INSTALLATION 715
DIVERTER VALVE 717
DISASSEMBLY OF CHECK VALVE 717
ASSEMBLY OF CHECK VALVE 717
DISASSEMBLY OF SELECTOR VALVE 718
ASSEMBLY OF SELECTOR VALVE 718
BRAKE VALVE 719
DISASSEMBLY 719
ASSEMBLY 721
BRAKE CHAMBER 723
DISASSEMBLY 723
ASSEMBLY 726
SLACK ADJUSTER 729
DISASSEMBLY 729
ASSEMBLY 730
BRAKE ASSEMBLY 731
REMOVAL 731
INSTALLATION 732
DISASSEMBLY 733
ASSEMBLY 735
SPRING CYLINDER 738
REMOVAL 738
INSTALLATION 739
DISASSEMBLY 740
ASSEMBLY 741
PARKING BRAKE CALIPER 742
REMOVAL 742
INSTALLATION 743
DISASSEMBLY 744
ASSEMBLY 745
PARKING BRAKE PAD 746
REMOVAL 746
INSTALLATION 746
HYDRAULIC TANK AND FILTER CASE 747
REMOVAL 747
INSTALLATION 749
HYDRAULIC PUMP 751
REMOVAL 751
INSTALLATION 752
SWITCH PUMP 753
REMOVAL 753
INSTALLATION 754
PISTON PUMP 755
DISASSEMBLY 755
ASSEMBLY 760
PPC VALVE 775
REMOVAL 775
INSTALLATION 777
DISASSEMBLY 778
ASSEMBLY 778
MAIN CONTROL VALVE 779
REMOVAL 779
INSTALLATION 781
DISASSEMBLY 784
ASSEMBLY 786
HYDRAULIC CYLINDER 788
DISASSEMBLY 788
ASSEMBLY 790
CENTER HINGE PIN 792
REMOVAL 792
INSTALLATION 800
WORK EQUIPMENT 809
REMOVAL 809
INSTALLATION 814
FUEL TANK 818
REMOVAL 818
INSTALLATION 820
40 MAINTENANCE STANDARD 823
ENGINE MOUNT 826
TRANSMISSION MOUNT 827
DAMPER 828
TORQUE CONVERTER CHARGING AND PPC PUMP 830
TORQUE CONVERTER 832
TORQUE CONVERTER REGULATOR 833
TRANSMISSION (1/2) 834
TRANSMISSION (2/2) 836
TRANSFER 837
TRANSMISSION CONTROL VALVE 838
UPPER VALVE 838
LOWER VALVE 840
SOLENOID VALVE 842
DRIVE SHAFT 843
CENTER SUPPORT 844
DIFFERENTIAL (1/2) 845
DIFFERENTIAL (2/2) 846
FINAL DRIVE 848
AXLE MOUNT 850
CENTER HINGE PIN 851
STEERING COLUMN 853
DIVERTER VALVE 854
STEERING CYLINDER MOUNT 855
EMERGENCY STEERING PUMP 856
STEERING CYLINDER 857
BRAKE CHAMBER 858
BRAKE VALVE 860
SLACK ADJUSTER 862
PARKING BRAKE 863
BRAKE 864
SPRING CYLINDER 866
CONTROL PUMP (BAR025) 867
PPC VALVE 868
MAIN CONTROL VALVE 870
BUCKET CYLINDER 872
BOOM CYLINDER 873
BUCKET LINKAGE 874
BUCKET POSITIONER AND BOOM KICK-OUT 876

DESCRIPTION:

Komatsu WA900-1 Wheel Loader Shop Manual CEBM002300 – PDF DOWNLOAD

• SERIAL NUMBERS VVA90041C – A20008 and up

G.B  14/12/24