Komatsu WA250-5,WA250PT-5 Wheel Loader Shop Manual SEBM033210 PDF

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Komatsu WA250-5,WA250PT-5 Wheel Loader Shop Manual SEBM033210 – PDF DOWNLOAD

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Komatsu WA250-5,WA250PT-5 Wheel Loader Shop Manual SEBM033210 – PDF DOWNLOAD

Language : English
Pages : 876
Downloadable : Yes
File Type : PDF

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TABLE OF CONTENTS:

Komatsu WA250-5,WA250PT-5 Wheel Loader Shop Manual SEBM033210 – PDF DOWNLOAD

Machine model Serial number

• WA250-5 70001 and up
• WA250PT-5 70001 and up

COVER . 1
CONTENTS . 2
01 GENERAL . 27
GENERAL ASSEMBLY DRAWINGS 28
SPECIFICATIONS . 29
WEIGHT TABLE . 33
LIST OF LUBRICANT AND COOLANT 35
10 STRUCTURE,FUNCTION AND MAINTENANCE STANDARD . 37
ENGINE MOUNT AND TRANSFER MOUNT 38
DAMPER . 39
COOLING SYSTEM . 40
TRANSFER OIL COOLER 41
POWER TRAIN 44
POWER TRAIN SYSTEM DIAGRAM . 46
DRIVE SHAFT (PROPELLER SHAFT) 48
HST HYDRAULIC PIPING DIAGRAM . 49
HST PUMP . 50
HIGH-PRESSURE RELIEF VALVE . 52
LOW-PRESSURE RELIEF VALVE 54
HST CHARGE PUMP 55
SPEED-RELATED VALVE (DA VALVE) . 56
HIGH-PRESSURE CUT-OFF VALVE 57
HST MOTOR 58
EP SERVO VALVE . 61
HA SERVO VALVE . 62
FORWARD-REVERSE SHUTTLE VALVE 63
TRANSFER . 64
CLUTCH SOLENOID VALVE 75
AXLE . 76
DIFFERENTIAL . 78
LIMITED-SLIP DIFFERENTIAL 84
FINAL DRIVE 90
AXLE MOUNTING AND CENTER HINGE PIN . 96
STEERING PIPING 101
STEERING COLUMN 102
PRIORITY VALVE .103
ORBIT-ROLL VALVE .106
2-WAY RESTRICTOR VALVE .114
CUSHION VALVE 115
STEERING CYLINDER 116
EMERGENCY STEERING PIPING 118
EMERGENCY STEERING VALVE .119
BRAKE PIPING .122
BRAKE VALVE 123
INCHING VALVE 127
CHARGE VALVE .128
ACCUMULATOR (FOR BRAKE) 132
SLACK ADJUSTER .133
BRAKE 136
PARKING BRAKE CONTROL 141
PARKING BRAKE 142
HYDRAULIC PIPING .144
HYDRAULIC TANK .152
4-GEAR PUMP UNIT .154
ACCUMULATOR (FOR PPC CIRCUIT) 156
LOCK VALVE .157
BYPASS VALVE .158
QUICK COUPLER VALVE 164
E.C.S.S. VALVE .165
ACCUMULATOR (FOR E.C.S.S.) .167
HYDRAULIC PIPING OF COOLING SYSTEM .168
COOLING FAN MOTOR 169
WORK EQUIPMENT CONTROL VALVE .171
WORK EQUIPMENT PPC VALVE .184
ATTACHMENT PPC VALVE (IF EQUIPPED) .192
WORK EQUIPMENT LINKAGE .196
BUCKET .200
CONTROL OF BUCKET POSITIONER, BOOM KICK-OUT, AND DUMP SPEED 202
WORK EQUIPMENT CYLINDER 217
AIR CONDITIONER (IF EQUIPPED) 220
MACHINE MONITORING SYSTEM 221
MACHINE MONITOR 231
LIST OF ITEMS DISPLAYED ON MONITOR .232
ELECTRICAL SYSTEM (HST CONTROLLER SYSTEM) 258
HST CONTROLLER .262
ENGINE START CIRCUIT .263
ENGINE STOP CIRCUIT 265
PREHEATING CIRCUIT (AUTOMATIC PREHEATING SYSTEM) .266
PARKING BRAKE CIRCUIT 267
ELECTRONICALLY CONTROLLED SUSPENSION SYSTEM 270
SENSORS 271
20 TESTING AND ADJUSTING .277
STANDARD VALUE TABLE FOR ENGINE 278
STANDARD VALUE TABLE FOR CHASSIS .279
TESTING AND ADJUSTING 283
TOOLS FOR TESTING, ADJUSTING, AND TROUBLESHOOTING 284
MEASURING ENGINE SPEED .286
MEASURING EXHAUST GAS COLOR 287
ADJUSTING VALVE CLEARANCE 288
MEASURING COMPRESSION PRESSURE .290
MEASURING BLOW-BY PRESSURE .291
TESTING AND ADJUSTING FUEL INJECTION TIMING 292
MEASURING ENGINE OIL PRESSURE 293
MEASURING,TESTING OPERATING FORCE OF ACCELERATOR PEDAL .294
ADJUSTING ENGINE STOP SOLENOID .296
ADJUSTING ENGINE SPEED SENSOR 297
TESTING AND ADJUSTING AIR CONDITIONER COMPRESSOR BELT TENSION 297
MEASURING DIRECTIONAL LEVER 298
TESTING AND ADJUSTING HST OIL PRESSURE .299
MEASURING CLUTCH CONTROL PRESSURE 304
TESTING AND ADJUSTING STEERING WHEEL .305
TESTING AND ADJUSTING STEERING OIL PRESSURE 307
BLEEDING AIR FROM STEERING CIRCUIT .308
TESTING HYDRAULIC FAN 309
MEASURING BRAKE PEDAL 310
TESTING AND ADJUSTING BRAKE PEDAL LINKAGE 311
MEASURING BRAKE PERFORMANCE 312
TESTING AND ADJUSTING ACCUMULATOR CHARGE PRESSURE 313
MEASURING BRAKE OIL PRESSURE .314
MEASURING WEAR OF BRAKE DISC .316
BLEEDING AIR FROM BRAKE CIRCUIT 317
MEASURING PARKING BRAKE PERFORMANCE 318
TESTING AND ADJUSTING PARKING BRAKE LINKAGE 319
MEASURING AND ADJUSTING WORK EQUIPMENT CONTROL .321
TESTING AND ADJUSTING WORK EQUIPMENT HYDRAULIC PRESSURE 322
TESTING AND ADJUSTING WORK EQUIPMENT PPC OIL PRESSURE 323
BLEEDING AIR .325
RELEASING REMAINING PRESSURE IN HYDRAULIC CIRCUIT 326
TESTING AND ADJUSTING BUCKET POSITIONER 327
TESTING AND ADJUSTING OF BOOM KICK-OUT .328
CHECKING PROXIMITY SWITCH ACTUATION DISPLAY LAMP .329
PROCEDURE FOR CHECKING DIODE .330
SPECIAL FUNCTIONS OF MACHINE MONITOR .331
FLOW OF MODES AND FUNCTIONS 332
FAILURE CODE TABLE .340
PM CLINIC INSPECTION CHART .350
TROUBLESHOOTING 353
POINTS TO REMEMBER WHEN TROUBLESHOOTING 354
SEQUENCE OF EVENTS IN TROUBLESHOOTING 355
PRECAUTIONS WHEN CARRYING OUT MAINTENANCE 356
CHECK BEFORE TROUBLESHOOTING .364
CATEGORIES,PROCEDURE,AND METHOD OF USING TROUBLESHOOTING CHARTS 365
PHENOMENA CONSIDERED TO BE FAILURES AND TROUBLESHOOTING NO .366
CONNECTION TABLE FOR CONNECTOR PIN NUMBERS .370
T-ADAPTER TABLE 392
CONNECTOR TYPES AND MOUNTING LOCATIONS .395
CONNECTOR LAYOUT DRAWING .402
TROUBLESHOOTING OF HST CONTROLLER SYSTEM (HST MODE) 407
HST CONTROLLER SYSTEM DIAGRAM 408
BEFORE TROUBLESHOOTING CODE DISPLAY 410
BEFORE TROUBLESHOOTING ELECTRICAL SYSTEM .411
INFORMATION CONTAINED IN TROUBLESHOOTING TABLE .412
ERROR CODE [989F00] (HST MOTOR PROTECTION CAUTION (00)) 414
ERROR CODE [DHH1KX] (HST OIL PRESSURE SENSOR INPUT SIGNAL OUTSIDE RANGE (KX)) 415
ERROR CODE [DLE2LC] (ENGINE REVOLUTION SENSOR REVOLUTION SPEED SIGNAL MISMATCH (LC)) .417
ERROR CODE [DW26KZ] (MOTOR 2 SOLENOID SYSTEM DISCONTINUITY OR SHORT-CIRCUITING (KZ)) .418
ERROR CODE [DX19KZ] (MOTOR 1 SOLENOID SYSTEM DISCONTINUITY OR SHORT-CIRCUITING (KZ)) .420
ERROR CODE [DX20KZ] (CLUTCH SOLENOID SYSTEM DISCONTINUITY OR SHORT-CIRCUITING (KZ)) 422
TROUBLESHOOTING CODE [HST-1] (DEFECTIVE HST CONTROLLER POWER SOURCE (HST CONTROLLER DOES NOT FUNCTION)) 424
TROUBLESHOOTING CODE [HST-2] (TRAVEL SPEED DOES NOT SHIFTED) .426
TROUBLESHOOTING CODE [HST-3] HST OUTPUT CONTROL (TRACTION CONTROL) CANNOT BE CONTROLLED 429
TROUBLESHOOTING CODE [HST-4] (TRAVEL SPEED LIMIT CANNOT BE CHANGED WHEN GEAR SPEED SELECTOR SWITCH IS IN”1ST”POSITION) .431
TROUBLESHOOTING CODE [HST-5] (TRAVEL SPEED IS NOT INCREASED) .433
TROUBLESHOOTING OF ECSS (ECSS MODE) (IF EQUIPPED) 435
RELATED ELECTRICAL CIRCUIT DIAGRAM .436
ECSS-1 MALFUNCTION OF ECSS .437
TROUBLESHOOTING OF MONITOR SYSTEM (MON MODE) .443
MONITOR SYSTEM CIRCUIT DIAGRAM .444
BEFORE TROUBLESHOOTING CODE DISPLAY 448
BEFORE TROUBLESHOOTING ELECTRICAL SYSTEM .449
INFORMATION CONTANED IN TROUBLESHOOTING TABLE 450
ERROR CODE [15B0NX] (HST OIL FILTER CLOGGED (NX)) 452
ERROR CODE [2G42ZG] (DECREASED BRAKE OIL PRESSURE (ZG)) 453
ERROR CODE [989F00] (HST MOTOR PROTECTION CAUTION (00)) 454
ERROR CODE [989FN1] (HST OVERRUNNING (N1)) .455
ERROR CODE [AB00L6] (DEFECTIVE BATTERY CHARGING CIRCUIT (L6)) 456
ERROR CODE [AB00MA] (DEFECTIVE BATTERY CHARGING CIRCUIT (MA)) 457
ERROR CODE [B@BAZG] (DEGREASED ENGINE OIL PRESSURE (ZG)) .458
ERROR CODE [B@BCNS] (ENGINE WATER TEMPERATURE OVERHEATING (NS)) 459
ERROR CODE [B@BCZK] (ALARM INDICATING LOW COOLANT LEVEL (ZK)) 460
ERROR CODE [B@C7NS] (AXLE OIL TEMPERATURE OVERHEATING (NS)) 461
ERROR CODE [B@CRNS] (HST OIL TEMPERATURE OVERHEATING (NS)) .462
ERROR CODE [D5ZHL6] (STARTING SWITCH”C” (IGN”C”) INPUT FAILURE (L6)) .464
ERROR CODE [DAF0KT] (CONTROLLER INSIDE FAILURE (KT)) .466
ERROR CODE [DAJ0KR] (HST CONTROLLER COMMUNICATION FAILURE (KR)) 468
ERROE CODE [DD15LD] (MONITOR PANEL MODE SELECTOR SWITCH 1 [■] (PANEL SWITCH 1) INPUT ERROR (LD)) .470
ERROR CODE [DD16LD] (MONITOR PANEL MODE SELECTOR SWITCH 1 [◇] (PANEL SWITCH 2) INPUT ERROR (LD)) .471
ERROR CODE [DD17LD] (MONITOR PANEL MODE SELECTOR SWITCH 2 [<] (PANEL SWITCH 3) INPUT ERROR (LD)) .472
ERROR CODE [DD18LD] (MONITOR PANEL MODE SELECTOR SWITCH 2 [>] (PANEL SWITCH 4) INPUT ERROR (LD)) .473
ERROR CODE [DDK3KB] (MULTIPLE DIRECTIONAL LEVER FR SIGNAL INPUT (KB)) 474
ERROR CODE [DDS5L6] (DECREASED STEERING OIL PRESSURE (L6)) .476
ERROR CODE [DGE2KX] (ENGINE WATER TEMPERATURE (HIGH TEMPERATURE) SENSOR SYSTEM FAILURE (KX)) .477
ERROR CODE [DGE3L6] (ENGINE WATER TEMPERATURE (LOW TEMPERATURE) SENSOR SYSTEM FAILURE (L6)) 478
ERROR CODE [DGH1KX] (HST OIL TEMPERATURE SENSOR SYSTEM FAILURE (KX)) .479
ERROR CODE [DGR4KA] (AXLE OIL TEMPERATURE SENSOR SYSTEM DISCONTINUITY (KA)) 480
ERROR CODE [DGR4KX] (AXLE OIL TEMPERATURE SENSOR SYSTEM FAILURE (KX)) 481
ERROR CODE [DHE4L6] (ENGINE OIL PRESSURE SENSOR SYSTEM DISCONTINUITY (L6)) .482
TROUBLESHOOTING CODE [MON-1] (THE PARKING BRAKE INDICATOR LAMP DOES NOT LIGHT ON) 484
TROUBLESHOOTING CODE [MON-2] (THE BRAKE OIL PRESSURE CAUTION LAMP DOES NOT LIGHT ON) .488
TROUBLESHOOTING CODE [MON-3] (THE ENGINE WATER TEMPERATURE CAUTION LAMP DOES NOT LIGHT ON, OR AFTER THE ENGINE STARTS, THE ENGINE WATER TEMPERATURE GAUGE DOES NOT RISE.) 489
TROUBLESHOOTING CODE [MON-4] (THE HST OIL TEMPERATURE CAUTION LAMP DOES NOT LIGHT ON, OR AFTER THE ENGINE STARTS,THE HST OIL TEMPERATURE GAUGE DOES NOT RISE.) .490
TROUBLESHOOTING CODE [MON-5] (THE FUEL LEVEL GAUGE DOES NOT RISE OR DECREASE.) .491
TROUBLESHOOTING CODE [MON-6] (THE RADIATOR COOLANT LEVEL CAUTION LAMP DOES NOT LIGHT ON) .492
TROUBLESHOOTING CODE [MON-7] (THE STEERING OIL PRESSURE CAUTION LAMP DOES NOT LIGHT ON) 493
TROUBLESHOOTING CODE [MON-8] (THE EMERGENCY STEERING OIL PRESSURE INDICATOR LAMP DOES NOT LIGHT ON) 494
TROUBLESHOOTING CODE [MON-9] (INPUT FAILURE IN MONITOR PANEL MODE SELECTOR SWITCH 1 [■] (PANEL SWITCH 1)) 495
TROUBLESHOOTING CODE [MON-10] (INPUT FAILURE IN MONITOR PANEL MODE SELECTOR SWITCH 1 [◇] (PANEL SWITCH 2)) .496
TROUBLESHOOTING CODE [MON-11] (INPUT FAILURE IN MONITOR PANEL MODE SELECTOR SWITCH 2 [<] (PANEL SWITCH 3)) .497
TROUBLESHOOTING CODE [MON-12] (INPUT FAILURE IN MONITOR PANEL MODE SELECTOR SWITCH 2 [>] (PANEL SWITCH 4)) .498
TROUBLESHOOTING CODE [MON-13] (THE ALARM BUZZER DOES NOT SOUND OR STOP) 499
TROUBLESHOOTING CODE [MON-14] THE WIPER DOES NOT FUNCTION 500
TROUBLESHOOTING CODE [MON-15] THE LAMPS DO NOT WORK PROPERLY .500
TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE) 501
ELECTRICAL SYSTEM DIAGRAM 502
PARKING BRAKE RELATED DIAGRAM 506
BEFORE TROUBLESHOOTING ELECTRICAL SYSTEM .508
INFORMATION CONTAINED IN TROUBLESHOOTING TABLE .510
TROUBLESHOOTING CODE [E-1] (THE ENGINE DOES NOT START) .512
TROUBLESHOOTING CODE [E-2] (THE ENGINE DOES NOT STOP) 516
TROUBLESHOOTING CODE [E-3] (PREHEATING IS IMPOSSIBLE OR CONSTANT) 518
TROUBLESHOOTING CODE [E-4] (THE PARKING BRAKE(MECHANICAL TYPE)DOES NOT FUNCTION) .522
TROUBLESHOOTING CODE [E-5] (DEFECTIVE BOOM KICK-OUT FUNCTION AND CANCELLATION) .529
TROUBLESHOOTING CODE [E-6] (DEFECTIVE BUCKET POSITIONER FUNCTION AND CANCELLATION) .532
TROUBLESHOOTING CODE [E-7] (DEFECTIVE LIFT ARM FLOATING HOLDING FUNCTION AND CANCELLATION) .535
TROUBLESHOOTING CODE [E-8] (TRAVEL DIRECTION IS NOT CHANGED NORMALLY) 536
TROUBLESHOOTING CODE [E-9] (THE WIPER DOES NOT FUNCTION) .542
TROUBLESHOOTING CODE [E-10] (THE WINDOW WASHER DOES NOT FUNCTION) 548
TROUBLESHOOTING CODE [E-11] (LAMPS DO NOT WORK PROPERLY) .551
TROUBLESHOOTING CODE [E-12] (THE HORN DOES NOT SOUND) 562
TROUBLESHOOTING CODE [E-13] (DEFECTIVE THE AIR CONDITIONER) 564
TROUBLESHOOTING OF HYDRAULIC,MECHANICAL SYSTEM (H MODE) 577
METHOD OF USING TROUBLESHOOTING CHART 578
FAILURE CODE AND CAUSE TABLE .580
H-1 THE MACHINE DOES NOT START .582
H-2 THE TRAVEL SPEED IS SLOW .583
H-3 THE THRUSTING FORCE IS WEAK 584
H-4 ENGINE STALLS WHEN TRAVELING OR ENGINE SPEED DROPS EXCESSIVELY .585
H-5 THE GEAR IS NOT SHIFTED 586
H-6 THE STEERING WHEEL DOES NOT TURN .587
H-7 THE STEERING WHEEL IS HEAVY 588
H-8 STEERING WHEEL SHAKES OR JERKS .589
H-9 MACHINE DEVIATES NATURALLY TO ONE SIDE WHEN TRAVELING 589
H-10 THE BRAKE DOES NOT WORK OR DOES NOT WORK WELL .590
H-11 THE BRAKE IS NOT RELEASED OR IS DRAGGED .591
H-12 THE LIFT ARM DOES NOT RISE OR LOWER .593
H-13 THE LIFT ARM MOVES SLOWLY OR THE LIFT ARM RISING FORCE IS INSUFFICIENT 594
H-14 WHEN RISING, THE LIFT ARM COMES TO MOVE SLOWLY AT SPECIFIC HEIGHT .595
H-15 THE LIFT ARM CYLINDER CANNOT HOLD DOWN THE BUCKET (THE BUCKET RISES IN THE AIR) .595
H-16 HYDRAULIC DRIFTS OF THE LIFT ARM OCCUR OFTEN 595
H-17 THE LIFT ARM WOBBLES DURING OPERATION .595
H-18 WHEN THE CONTROL LEVER IS SWITCHED FROM”HOLD”TO “RAISE”, THE LIFT ARM FALLS TEMPORARILY .596
H-19 THE BUCKET DOES NOT TILT BACK .597
H-20 THE BUCKET MOVES SLOWLY OR THE TILTING-BACK FORCE IS INSUFFICIENT .598
H-21 THE BUCKET COMES TO OPERATE SLOWLY IN HE MIDST OF TILTING-BACK 599
H-22 THE BUCKET CYLINDER CANNOT HOLD DOWN THE BUCKET .599
H-23 HYDRAULIC DRIFTS OF THE BUCKET OCCUR OFTEN 599
H-24 THE BUCKET WOBBLES DURING TRAVEL WITH CARGO(THE WORK EQUIPMENT VALVE IS SET TO”HOLD”) .600
H-25 WHEN THE CONTROL LEVER IS SWITCHED FROM”HOLD”TO”TILT”, THE BUCKET FALLS TEMPORARILY .600
H-26 THE CONTROL LEVERS OF THE LIFT ARM AND BUCKET DO NOT MOVE SMOOTHLY AND HEAVY 600
H-27 THE TRAVEL DAMPER DOES NOT OPERATE AND MACHINE PITCHES AND BOUNCES 601
TROUBLESHOOTING OF ENGINE (S MODE) .603
METHOD OF USING TROUBLESHOOTING CHARTS .604
S-1 STARTING PERFORMANCE IS POOR (STARTING ALWAYS TAKES TIME) 608
S-2 ENGINE DOES NOT START 610
(1) ENGINE DOES NOT TURN .610
(2) ENGINE TURNS BUT NO EXHAUST SMOKE COMES OUT (FUEL IS NOT BEING INJECTED) .611
(3) EXHAUST SMOKE COMES OUT BUT ENGINE DOES NOT START (FUEL IS BEING INJECTED) .612
S-3 ENGINE DOES NOT PICK UP SMOOTHLY (FOLLOW-UP IS POOR) .613
S-4 ENGINE STOPS DURING OPERATIONS .614
S-5 ENGINE DOES NOT ROTATE SMOOTHLY (HUNTING) 615
S-6 ENGINE LACKS OUTPUT (OR LACKS POWER) .616
S-7 EXHAUST SMOKE IS BLACK (INCOMPLETE COMBUSTION) .617
S-8 OIL CONSUMPTION IS EXCESSIVE (OR EXHAUST SMOKE IS BLUE) 618
S-9 OIL BECOMES CONTAMINATED QUICKLY .619
S-10 FUEL CONSUMPTION IS EXCESSIVE .620
S-11 OIL IS IN COOLING WATER, OR WATER SPURTS BACK, OR WATER LEVEL GOES DOWN .621
S-12 OIL PRESSURE CAUTION LAMP LIGHTS UP (DROP IN OIL PRESSURE) 622
S-13 OIL LEVEL RISES (WATER,FUEL IN OIL) .623
S-14 WATER TEMPERATURE BECOMES TOO HIGH (OVERHEATING) 624
S-15 ABNORMAL NOISE IS MADE 625
S-16 VIBRATION IS EXCESSIVE 626
30 DISASSEMBLY AND ASSEMBLY 627
HOW TO READ THIS MANUAL 629
REMOVAL AND INSTALLATION OF ASSEMBLIES .629
DISASSEMBLY AND ASSEMBLY OF ASSEMBLIES .630
PRECAUTIONS WHEN PERFORMING OPERATION 631
SPECIAL TOOL LIST 633
SKETCHES OF SPECIAL TOOLS 636
REMOVAL, INSTALLATION OF FUEL INJECTION PUMP ASSEMBLY 644
SPECIAL TOOLS 644
REMOVAL 644
INSTALLATION .646
REMOVAL, INSTALLATION OF NOZZLE HOLDER ASSEMBLY 648
SPECIAL TOOLS 648
REMOVAL 648
INSTALLATION .649
REMOVAL, INSTALLATION OF CYLINDER HEAD ASSEMBLY 650
SPECIAL TOOLS 650
REMOVAL 650
INSTALLATION .655
REMOVAL, INSTALLATION OF ENGINE ASSEMBLY .658
REMOVAL 658
INSTALLATION .663
REMOVAL, INSTALLATION OF RADIATOR ASSEMBLY .665
REMOVAL 665
INSTALLATION .666
REMOVAL, INSTALLATION OF AIR AFTERCOOLER .667
REMOVAL 667
INSTALLATION .668
REMOVAL, INSTALLATION OF HYDRAULIC OIL COOLER ASSEMBLY .669
REMOVAL .669
INSTALLATION 670
REMOVAL, INSTALLATION OF COOLING FAN AND FAN MOTOR ASSEMBLY 671
REMOVAL 671
INSTALLATION 672
REMOVAL, INSTALLATION OF FUEL TANK ASSEMBLY 673
REMOVAL 673
INSTALLATION .674
REMOVAL, INSTALLATION OF TRANSFER 675
REMOVAL 675
INSTALLATION .677
DISASSEMBLY, ASSEMBLY OF TRANSFER ASSEMBLY .678
SPECIAL TOOLS 678
DISASSEMBLY 678
ASSEMBLY .686
REMOVAL, INSTALLATION OF PARKING BRAKE ASSEMBLY 698
REMOVAL 698
INSTALLATION .699
DISASSEMBLY, ASSEMBLY OF PARKING BRAKE ASSEMBLY 700
SPECIAL TOOLS 700
DISASSEMBLY 700
ASSEMBLY .702
REMOVAL, INSTALLATION OF FRONT AXLE ASSEMBLY .705
REMOVAL 705
INSTALLATION .706
REMOVAL, INSTALLATION OF REAR AXLE ASSEMBLY 707
REMOVAL 707
INSTALLATION .709
DISASSEMBLY, ASSEMBLY OF AXLE HOUSING ASSEMBLY .710
SPECIAL TOOLS 710
DISASSEMBLY 710
ASSEMBLY .713
DISASSEMBLY, ASSEMBLY OF DIFFERENTIAL ASSEMBLY .719
SPECIAL TOOLS 719
DISASSEMBLY 719
ASSEMBLY .728
DISASSEMBLY AND ASSEMBLY OF HST PUMP ASSEMBLY 745
SPECIAL TOOLS LIST .745
DISASSEMBLY 745
ASSEMBLY .754
DISASSEMBLY AND ASSEMBLY OF HST MOTOR ASSEMBLY .772
SPECIAL TOOLS LIST .772
DISASSEMBLY 772
ASSEMBLY .781
REMOVAL, INSTALLATION OF WORK EQUIPMENT CONTROL VALVE ASSEMBLY .788
REMOVAL 788
INSTALLATION .789
REMOVAL, INSTALLATION OF TRAVEL DAMPER VALVE ASSEMBLY (IF EQUIPPED) 790
REMOVAL 790
INSTALLATION .791
REMOVAL, INSTALLATION OF HYDRAULIC TANK ASSEMBLY .792
REMOVAL 792
INSTALLATION .793
REMOVAL, INSTALLATION OF WORK EQUIPMENT ASSEMBLY .794
REMOVAL 794
INSTALLATION .797
DISASSEMBLY, ASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLY .801
SPECIAL TOOLS 801
DISASSEMBLY 802
ASSEMBLY .805
REMOVAL, INSTALLATION OF OPERATOR’S CAB ASSEMBLY .811
REMOVAL 811
INSTALLATION .814
REMOVAL, INSTALLATION OF OPERATOR’S CAB GLASS (STUCK GLASS) 815
SPECIAL TOOLS 815
REMOVAL 815
INSTALLATION .816
COATING MATERIALS 822
REMOVAL, NSTALLATION OF CENTER HINGE PIN 823
REMOVAL 823
INSTALLATION .827
REMOVAL, INSTALLATION OF COUNTERWEIGHT .832
REMOVAL 832
INSTALLATION 833
REMOVAL, INSTALLATION OF AIR CONDITIONER UNIT ASSEMBLY .834
SPECIAL TOOLS 834
REMOVAL 834
INSTALLATION .835
REMOVAL, INSTALLATION OF CONDITIONER COMPRESSOR ASSEMBLY .836
SPECIAL TOOLS 836
REMOVAL 836
INSTALLATION .836
REMOVAL, INSTALLATION OF MONITOR PANEL .837
REMOVAL 837
INSTALLATION .840
REMOVAL, INSTALLATION OF HST CONTROLLER ASSEMBLY .841
REMOVAL 841
INSTALLATION .841
90 OTHERS 843
HYDRAULIC CIRCUIT DIAGRAM WA250-5 845
HYDRAULIC CIRCUIT DIAGRAM WA250PT-5 847
ELECTRICAL CIRCUIT DIAGRAM 1/4 (1/4) (MACHINES EQUIPPED WITH ROPS CAB) .849
ELECTRICAL CIRCUIT DIAGRAM 1/4 (2/4) (MACHINES EQUIPPED WITH ROPS CAB) .851
ELECTRICAL CRICUIT DIAGRAM 1/4 (3/4) (MACHINES EQUIPPED WITH ROPS CAB) .853
ELECTRICAL CRICUIT DIAGRAM 1/4 (4/4) (MACHINES EQUIPPED WITH ROPS CAB) .855
ELECTRICAL CIRCUIT DIAGRAM 2/4 (MACHINES EQUIPPED WITH ROPS CAB) .857
ELECTRICAL CIRCUIT DIAGRAM 3/4 (MACHINES EQUIPPED WITH ROPS CAB) .859
ELECTRICAL CIRCUIT DIAGRAM 4/4 (MACHINES EQUIPPED WITH ROPS CAB) .861
ELECTRICAL CIRCUIT DIAGRAM 1/4 (1/4) (MACHINES EQUIPPED WITH ROPS CANOPY .863
ELECTRICAL CIRCUIT DIAGRAM 1/4 (2/4) (MACHINES EQUIPPED WITH ROPS CANOPY) 865
ELECTRICAL CIRCUIT DIAGRAM 1/4 (3/4) (MACHINE EQUIPPED WITH ROPS CANOPY) .867
ELECTRICAL CIRCUIT DIAGRAM 1/4 (4/4) (MACHINE EQUIPPED WITH ROPS CANOPY) .869
ELECTRICAL CIRCUIT DIAGRAM 2/4 (MACHINES EQUIPPED WITH ROPS CANOPY) 871
ELECTRICAL CIRCUIT DIAGRAM 3/4 (MACHINES EQUIPPED WITH ROPS CANOPY) 873
ELECTRICAL CIRCUIT DIAGRAM 4/4 (MACHINES EQUIPPED WITH ROPS CANOPY) 875

DESCRIPTION:

Komatsu WA250-5,WA250PT-5 Wheel Loader Shop Manual SEBM033210 – PDF DOWNLOAD

Machine model Serial number

• WA250-5 70001 and up
• WA250PT-5 70001 and up

G.B 28/12/24