Komatsu WA900-3 Loader Shop Manual SEBM013519 PDF

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Komatsu WA900-3 Loader Shop Manual SEBM013519 – PDF DOWNLOAD

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Komatsu WA900-3 Loader Shop Manual SEBM013519 – PDF DOWNLOAD 

Language : English
Pages : 1260
Downloadable : Yes
File Type : PDF

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Komatsu WA900-3 Loader Shop Manual SEBM013519 – PDF DOWNLOAD 

MACHINE MODEL    SERIAL NO.
WA900-3                      50001 and up

COVER 1
CONTENTS 2
LIST OF REVISED PAGE 3
01 GENERAL 31
GENERAL ASSEMBLY DRAWING 32
SPECIFICATIONS 33
WEIGHT TABLE 36
LIST OF LUBRICANT AND WATER 38
10 STRUCTURE AND FUNCTION 41
POWER TRAIN 42
POWER TRAIN SYSTEM 43
ENGINE CONTROL 46
SERVO CYLINDER 47
RADIATOR AND COOLER 51
DAMPER 54
TORQUE CONVERTER AND TRANSMISSION PIPING 55
TRANSMISSION HYDRAULIC SYSTEM DIAGRAM 56
TRANSMISSION HYDRAULIC CIRCUIT DIAGRAM 57
TORQUE CONVERTER 58
TRANSMISSION 63
TRANSFER 73
TRANSMISSION CONTROL VALVE 74
TORQUE CONVERTOR OIL COOLER 92
DRIVE SHAFT 93
CENTER SUPPORT 94
AXLE 95
FINAL DRIVE 100
AXLE MOUNT 102
CENTER HINGE PIN 104
TIRE AND WHEEL 105
STEERING PIPING DIAGRAM 106
STEERING COLUMN 109
JOYSTICK LINKAGE 110
STEERING PUMP 112
SWITCH PUMP 119
STEERING DEMAND VALVE 131
STEERING UNIT (ORBIT-ROLL VALVE) 142
PROPORTIONAL SOLENOID VALVE 145
EPC VALVE 146
ROTARY VALVE 147
TOW-WAY RESTRICTOR VALVE 151
DIVERTER VALVE 152
BRAKE PIPING 156
BRAKE CIRCUIT DIAGRAM 158
BRAKE VALVE 162
CHARGE VALVE 173
ACCUMULATOR (FOR BRAKE) 177
SLACK ADJUSTER 178
BRAKE 181
PARKING BRAKE 182
SPRING CYLINDER 186
PARKING BRAKE SOLENOID VALVE 187
HYDRAULIC PIPING 188
WORK EQUIPMENT HYDRAULIC CIRCUIT DIAGRAM 192
WORK EQUIPMENT LEVER LINKAGE 207
HYDRAULIC TANK 208
MAIN PISTON PUMP 211
ES VALVE (ENGINE SENSING VALVE) 223
SERVO VALVE 225
PPC VALVE (PROPORTIONAL PRESSURE VALVE) 228
PPC RELIEF VALVE 232
ACCUMULATOR (FOR PPC VALVE) 233
MAIN CONTROL VALVE 234
COOLING FAN HYDRAULIC PIPING 259
COOLING FAN HYDRAULIC CIRCUIT DIAGRAM 260
PRIORITY VALVE 261
COOLING FAN MOTOR 262
LUBRICATION OF WORK EQUIPMENT 266
WORK EQUIPMENT LINKAGE 268
BUCKET POSITIONER AND BOOM KICK-OUT 270
OPERATION OF PROXIMITY SWITCH 272
CAB 276
ROPS CANOPY 277
AIR CONDITIONER 278
ELECTRIC CIRCUIT DIAGRAM 281
MACHINE MONITOR SYSTEM 284
MAIN MONITOR 286
MAINTENANCE MONITOR 292
MULTI MONITOR SYSTEM (IF EQUIPPED) 294
ENGINE STARTING CIRCUIT 316
ENGINE STOP CIRCUIT 319
PREHEATING CIRCUIT 320
ELECTRICAL TRANSMISSION CONTROL 321
KICK-DOWN, HOLD SWITCH 324
JOYSTICK STEERING SYSTEM 325
TRANSMISSION AND JOYSTICK STEERING CONTROLLER 328
AJSS (ADVANCED JOYSTICK STEERING SYSTEM) 330
TRANSMISSION AND JOYSTICK STEERING CONTROLLER 334
ELECTRIC PARKING BRAKE CONTROL 337
BRAKE COOLING SYSTEM (IF EQUIPPED) 346
55℃ SPECIFICATION 356
EMERGENCY ENGINE STOP (FOR RIO TINTO) 360
HYDRAULIC OIL LEVEL SENSOR (FOR RIO TINTO) 363
BATTERY AND STARTER ISOLATOR, BATTERY JUMP START (FOR RIO TINTO) 366
20 TESTING AND ADJUSTING 369
STANDARD VALUE TABLE FOR ENGINE 370
STANDARD VALUE TABLE FOR CHASSIS 371
STANDARD VALUE TABLE FOR ELECTRICAL PARTS 379
TESTING AND ADJUSTING 397
TABLE OF TOOLS FOR TESTING, ADJUSTING, AND TROUBLESHOOTING 398
MEASURING ENGINE SPEED 401
MEASURING EXHAUST GAS COLOR 403
ADJUSTING VALVE CLEARANCE 404
MEASURING COMPRESSION PRESSURE 405
MEASURING BLOW-BY PRESSURE 406
TESTING AND ADJUSTING FUEL INJECTION TIMING 407
MEASURING ENGINE OIL PRESSURE 409
MEASURING EXHAUST TEMPERATURE 410
MEASURING AIR SUPPLY PRESSURE (BOOST PRESSURE) 411
TESTING AND ADJUSTING ALTERNATOR BELT TENSION 412
TESTING AND ADJUSTING BELT TENSION FOR AIR CONDITIONER COMPRESSOR 413
MEASURING ACCELERATOR PEDAL OPERATING EFFORT 414
MEASURING ACCELERATOR PEDAL OPERATING ANGLE 415
ADJUSTING FUEL CONTROL CABLE, LINKAGE, AND SERVO CYLINDER 416
ADJUSTING ENGINE STOPPING MOTOR CABLE 418
TESTING AND ADJUSTING TORQUE CONVERTER AND TRANSMISSION OIL PRESSURE 420
PROCEDURE FOR OPERATING EMERGENCY STEERING SPOOL WHEN TRANSMISSION VALVE FAILS 423
TESTING AND ADJUSTING STEERING OIL PRESSURE 425
TESTING AND ADJUSTING EMERGENCY STEERING OIL PRESSURE 426
BLEEDING AIR FROM STEERING CIRCUIT 428
TESTING AND ADJUSTING STEERING STOP VALVE 429
TESTING AND ADJUSTING STEERING STOPPER BOLT 430
TESTING AND ADJUSTING STEERING LEVER ANGLE SENSOR AND FRAME ANGLE SENSOR 431
TESTING WHEEL BRAKE PERFORMANCE 432
TESTING WHEEL BRAKE OIL PRESSURE DROP 433
MEASURING WEAR OF WHEEL BRAKE DISC 435
TESTING AND ADJUSTING ACCUMULATOR CHARGE CUT-IN AND CUT-OUT PRESSURE 436
TESTING OF ACCUMULATOR NITROGEN GAS PRESSURE AND PROCEDURE FOR CHARGING ACCUMULATOR WITH NITROGEN GAS 438
BLEEDING AIR FROM WHEEL BRAKE CIRCUIT 450
TESTING PARKING BRAKE PERFORMANCE 451
MEASURING PARKING BRAKE SOLENOID OUTPUT PRESSURE 452
CHECKING AND ADJUSTING PARKING BRAKE PAD 453
TESTING AND ADJUSTING PPC PRESSURE 455
ADJUSTING PPC VALVE LINKAGE 457
TESTING AND ADJUSTING WORK EQUIPMENT HYDRAULIC PRESSURE 458
BLEEDING AIR FROM PISTON PUMP 460
BLEEDING AIR FROM WORK EQUIPMENT CIRCUIT 461
ADJUSTING WORK EQUIPMENT LEVER LINKAGE 462
RELEASING REMAINING PRESSURE IN HYDRAULIC CIRCUIT 464
TESTING AND ADJUSTING BUCKET PROXIMITY SWITCH 465
TESTING AND ADJUSTING BOOM PROXIMITY SWITCH 466
TESTING PROXIMITY ACTUATION PILOT LAMP 467
ADJUSTING SPEEDOMETER MODULE OF MAIN MONITOR 468
ADJUSTING JOYSTICK LEVER POTENTIOMETER 469
ADJUSTING JOYSTICK LEVER NEUTRAL DETECTION SWITCH 470
TROUBLESHOOTING 471
POINTS TO REMEMBER WHEN TROUBLESHOOTING 472
SEQUENCE OF EVENTS IN TROUBLESHOOTING 473
POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE 474
CHECKS BEFORE TROUBLESHOOTING 482
TYPES AND LOCATIONS OF CONNECTORS 483
CONNECTOR ARRANGEMENT DIAGRAM 490
WIRING TABLE FOR CONNECTOR PIN NUMBERS 497
T-ADAPTER BOX AND T-ADAPTER TABLE 530
EXPLANATION OF FUNCTIONS OF ELECTRIC CONTROL MECHANISM 533
METHOD OF DISPLAYING ACTION CODE AND FAILURE CODE 538
CHART OF ACTION CODES AND FAILURE CODES, AND RE-ENACTION 540
TRANSMISSION CONTROLLER LED DISPLAY 545
METHOD OF USING JUDGEMENT TABLE 547
METHOD OF USING TROUBLESHOOTING CHARTS 548
METHOD OF USING MATRIX TROUBLESHOOTING TABLES 550
TROUBLESHOOTING OF ENGINE SYSTEM (S MODE) 553
METHOD OF USING TROUBLESHOOTING CHARTS 554
S-1 STARTING PERFORMANCE IS POOR (STARTING ALWAYS TAKES TIME) 558
S-2 ENGINE DOES NOT START 559
① ENGINE DOES NOT TURN 559
② ENGINE TURNS BUT NO EXHAUST GAS COMES OUT (FUEL IS NOT BEING INJECTED) 560
③ EXHAUST GAS COMES OUT BUT ENGINE DOES NOT START (FUEL IS BEING INJECTED) 561
S-3 ENGINE DOES NOT PICK UP SMOOTHLY (FOLLOW-UP IS POOR) 562
S-4 ENGINE STOPS DURING OPERATIONS 563
S-5 ENGINE DOES NOT ROTATE SMOOTHLY (HUNTING) 564
S-6 ENGINE LACKS UOTPUT (NO POWER) 565
S-7 EXHAUST GAS IS BLACK (INCOMPLETE COMBUSTION) 566
S-8 OIL CONSUMPTION IS EXCESSIVE (OR EXHAUST GAS IS BLUE) 567
S-9 OIL BECOMES CONTAMINATED QUICKLY 568
S-10 FUEL CONSUMPTION IS EXCESSIVE 569
S-11 OIL IS IN COOLING WATER, OR WATER SPURTS BACK, OR WATER LEVEL GOES DOWN 570
S-12 OIL PRESSURE LAMP LIGHTS UP (DROP IN OIL PRESSURE) 571
S-13 OIL LEVEL RISES 572
S-14 WATER TEMPERATURE BECOMES TOO HIGH (OVERHEATING) 573
S-15 ABNORMAL NOISE IS MADE 574
S-16 VIBRATION IS EXCESSIVE 575
TROUBLESHOOTING OF TRANSMISSION CONTROL SYSTEM (T MODE) 577
JUDGEMENT TABLE FOR TRANSMISSION CONTROL SYSTEM RELATED PARTS 578
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE 580
ELECTRICAL CIRCUIT DIAGRAM FOR TRANSMISSION CONTROL SYSTEM 588
T-1 FAILURE CODE [10] (SHORT CIRCUIT, DISCONNECTION, SHORT CIRCUIT WITH POWER SOURCE IN BACKUP LAMP RELAY) IS DISPLAYED 592
STEERING WHEEL SPECIFICATION, STEERING WHEEL AND JOYSTICK STEERING SPECIFICATION 592
T-2 FAILURE CODE [10] (SHORT CIRCUIT, DISCONNECTION, SHORT CIRCUIT WITH POWER SOURCE IN BACKUP LAMP RELAY) IS DISPLAYED 593
AJSS (ADVANCED JOYSTICK STEERING SYSTEM) SPECIFICATION 593
T-3 FAILURE CODE [12] (SHORT CIRCUIT, DISCONNECTION, SHORT CIRCUIT WITH POWER SOURCE IN F SOLENOID) IS DISPLAYED 594
T-4 FAILURE CODE [13] (SHORT CIRCUIT, DISCONNECTION, SHORT CIRCUIT WITH POWER SOURCE IN R SOLENOID) IS DISPLAYED 595
T-5 FAILURE CODE [14] (SHORT CIRCUIT, DISCONNECTION, SHORT CIRCUIT WITH POWER SOURCE IN 1ST SOLENOID) IS DISPLAYED 596
T-6 FAILURE CODE [15] (SHORT CIRCUIT, DISCONNECTION, SHORT CIRCUIT WITH POWER SOURCE IN 2ND SOLENOID) IS DISPLAYED 597
T-7 FAILURE CODE [16] (SHORT CIRCUIT, DISCONNECTION, SHORT CIRCUIT WITH POWER SOURCE IN 3RD SOLENOID) IS DISPLAYEED 598
T-8 FAILURE CODE [19] (SHORT CIRCUIT, DISCONNECTION IN JOYSTICK DIRECTIONAL SWITCH SYSTEM) IS DISPLAYED 599
T-9 FAILURE CODE [20] (SHORT CIRCUIT, DISCONNECTION IN DIRECTIONAL SWITCH SYSTEM) IS DISPLAYED 600
STEERING WHEEL SPECIFICATION, STEERING WHEEL AND JOYSTICK STEERING SPECIFICATION 600
T-10 FAILURE CODE [20] (SHORT CIRCUIT OR DISCONNECTION IN JOYSTICK DIRECTIONAL SWITCH SYSTEM) IS DISPLAYED 603
AJSS (ADVANCED JOYSTICK STEERING SYSTEM) SPECIFICATION 603
T-11 FAILURE CODE [21] (SHORT CIRCUIT, DISCONNECTION IN RANGE SWITCH SYSTEM) IS DISPLAYED 604
STEERING WHEEL SPECIFICATION, STEERING WHEEL AND JOYSTICK STEERING SPECIFICATION 604
T-12 FAILURE CODE [21] (SHORT CIRCUIT OR DISCONNECTION IN JOYSTICK SHIFT-UP/SHIFT-DOWN SWITCH SYSTEM) IS DISPLAYED 607
T-13 FAILURE CODE [22] (DISCONNECTION IN TRAVEL SPEED SENSOR) IS DISPLAYED 608
T-14 FAILURE CODE [23] (SHORT CIRCUIT, DISCONNECTION IN ENGINE SPEED SENSOR SYSTEM) IS DISPLAYED 609
T-15 KICKDOWN SWITCH SIGNAL SYSTEM AND HOLD SWITCH SIGNAL SYSTEM 610
T-16 SHIFT-DOWN SWITCH SIGNAL SYSTEM AND SHIFT-UP SWITCH SIGNAL SYSTEM 611
T-17 TRANSMISSION CUT-OFF SIGNAL SYSTEM 612
T-18 NEUTRALIZER SIGNAL SYSTEM 613
T-19 BUZZER SIGNAL SYSTEM 614
T-20 NETWORK SYSTEM 615
T-21 TRANSMISSION CONTROLLER POWER SOURCE SYSTEM 616
T-22 SHORT CIRCUIT IN TRAVEL SPEED SENSOR SYSTEM 617
T-23 ABNORMALITY IN MACHINE SELECTION WIRING HARNESS 618
TROUBLESHOOTING OF MAIN MONITOR SYSTEM (M MODE) 619
TROUBLE DATA DISPLAY 621
ELECTRICAL CIRCUIT DIAGRAM FOR MAIN MONITOR SYSTEM 624
M-1 MAIN MONITOR DOES NOT WORK 626
M-2 WHEN STARTING SWITCH IS TURNED ON (WITHIN 3 SECONDS) AND ENGINE IS STARTED IMMEDIATELY, ALL LAMPS STAY LIGHTED UP 627
M-3 SPEEDOMETER DISPLAY DOES NOT WORK PROPERLY 628
M-4 ABNORMALITY IN SHIFT INDICATOR 629
a) DISPLAYS N EVEN WHEN DIRECTIONAL LEVER IS AT F 629
b) DISPLAYS N EVEN WHEN DIRECTIONAL LEVER IS AT R 629
c) DOES NOT DISPLAY N EVEN WHEN DIRECTIONAL LEVER IS AT N (DISPLAY 1ST-3RD) 630
d) DOES NOT DISPLAY 1ST EVEN WHEN GEAR SHIFT LEVER IS AT 1ST POSITION (DIRECTIONAL LEVER IS AT F OR R POSITION) 630
e) DOES NOT DISPLAY 2ND EVEN WHEN GEAR SHIFT IS AT 2ND POSITION (DIRECTION LEVER IS AT F OR R POSITION) 630
f) DOES NOT DISPLAY 3RD EVEN WHEN THE GEAR SHIFT IS AT 3RD POSITION (DIRECTION LEVER IS AT F OR R POSITION) 631
M-5 HIGH BEAM DISPLAY DOES NOT LIGHT UP 632
M-6 TURN SIGNAL DISPLAY DOES NOT LIGHT UP 633
a) L H TURN SIGNAL DISPLAY DOES NOT LIGHT UP 633
b) R H TURN SIGNAL DISPLAY DOES NOT LIGHT UP 633
M-7 ABNORMALITY IN PARKING DISPLAY 634
a) PARKING LAMP DISPLAY DOES NOT LIGHT UP 634
b) PARKING LAMP DISPLAY STAYS LIGHTED UP 634
M-8 ABNORMALITY IN PREHEATING SYSTEM 635
a) DOES NOT CARRY OUT PREHEATING 635
b) ALWAYS CARRIES OUT PREHEATING FOR 45 SECONDS 636
c) PREHEATING STAYS ON 636
d) PREHEATING TIME BECOMES SHORTER, OR THERE IS VARIATION 637
M-9 NIGHT LIGHTING DOES NOT LIGHT UP 639
M-10 ABNORMALITY IN FRONT WORKING LAMP 640
a) NEITHER MONITOR DISPLAY NOR FRONT WORKING LAMP LIGHT UP 640
b) WORKING LAMP LIGHTS UP BUT MONITOR DISPLAY DOES NOT LIGHT UP 640
c) MONITOR DISPLAY LIGHTS UP BUT FRONT WORKING LAMP DOES NOT LIGHT UP 640
M-11 ABNORMALITY IN REAR WORKING LAMP 642
a) NEITHER MONITOR DISPLAY NOR REAR WORKING LAMP LIGHT UP 642
b) REAR WORKING LAMP LIGHTS UP BUT MONITOR DISPLAY DOES NOT LIGHT UP 642
c) MONITOR DISPLAY LIGHTS UP BUT REAR WORKING LAMP DOES NOT LIGHT UP 642
M-12 ABNORMALITY IN TRANSMISSION CUT-OFF 644
a) WHEN MONITOR SWITCH (TRANSMISSION CUT-OFF SWITCH) IS PRESSED, CUT-OFF FUNCTION IS NOT SWITCHED AND DISPLAY DOES NOT CHANGE 644
b) WHEN MONITOR SWITCH (TRANSMISSION CUT-OFF SWITCH) IS OFF, MONITOR DISPLAY GOES OUT BUT CUT-OFF FUNCTION IS ACTUATED WHEN PEDAL IS DEPRESSED 644
c) WHEN MONITOR DISPLAY IS TURNED OFF (TRANSMISSION CUT-OFF SWITCH TURNED OFF), CUT-OFF FUNCTION IS ALWAYS ACTUATED 644
d) CUT-OFF FUNCTION IS ALWAYS ACTUATED REGARDLESS OF MONITOR DISPLAY (TRANSMISSION CUT-OFF SWITCH ON OR OFF) 644
e) MONITOR DISPLAY LIGHTS UP (TRANSMISSION CUT-OFF SWITCH TURNED ON), BUT CUT-OFF FUNCTION IS NOT ACTUATED 645
M-13 ABNORMALITY IN LOW IDLING SELECTION 646
a) WHEN MONITOR SWITCH (LOW IDLE SELECTOR SWITCH) IS TURNED ON, THE LOW IDLING SPEED DOES NOT RISE AND DISPLAY DOES NOT CHANGE 646
b) WHEN THE MONITOR SWITCH (LOW IDLE SELECTOR SWITCH) IS TURNED ON, THE MONITOR LIGHTS UP BUT THE LOW IDLING SPEED DOES NOT RISE 646
c) WHEN THE MONITOR SWITCH (LOW IDLE SELECTOR SWITCH) IS TURNED OFF, THE MONITOR GOES OFF BUT THE LOW IDLING SPEED DOES NOT LOWER 647
M-14 ABNORMALITY IN EMERGENCY STEERING NORMAL DISPLAY 648
EMERGENCY STEERING NORMAL DISPLAY DOES NOT LIGHT UP 648
M-15 ABNORMALITY IN EMERGENCY STEERING ACTUATION DISPLAY 649
a) EMERGENCY STEERING ACTUATION DISPLAY DOES NOT LIGHT UP 649
b) EMERGENCY STEERING ACTUATION DISPLAY STAYS LIGHTED UP 649
M-16 ABNORMALITY IN PARKING BRAKE DRAGGING WARNING 650
a) WHEN PARKING BRAKE IS APPLIED, BUZZER SOUNDS (INTERMITTENTLY) AND CAUTION LAMP FLASHES EVEN WHEN DIRECTIONAL LEVER IS AT N 650
b) WHEN PARKING BRAKE IS APPLIED, BUZZER DOES NOT SOUND AND CAUTION LAMP DOES NOT LIGHT UP EVEN WHEN DIRECTIONAL LEVER IS AT POSITION OTHER THAN N 650
M-17 ABNORMALITY IN PARKING BRAKE DRAGGING WARNING (WHEN JOYSTICK STEERING MODE (OP)) 652
a) WHEN PARKING BRAKE IS APPLIED, BUZZER SOUNDS (INTERMITTENTLY) AND CAUTION LAMP FLASHES EVEN WHEN DIRECTIONAL LEVER IS AT N 652
b) WHEN PARKING BRAKE IS APPLIED, BUZZER DOES NOT SOUND AND CAUTION LAMP DOES NOT LIGHT UP EVEN WHEN DIRECTIONAL LEVER IS AT POSITION OTHER THAN N 652
M-18 WHEN PARKING BRAKE DRAGGING WARNING IS GIVEN, BUZZER AND CAUTION LAMP ARE ACTUATED CONTINUOUSLY, OR THEY ARE NOT ACTUATED 654
a) ACTUATED CONTINUOUSLY 654
b) NOT ACTUATED 654
M-19 ABNORMALITY IN BUZZER 655
a) BUZZER DOES NOT SOUND WHEN STARTING SWITCH IS AT ON (FOR 3 SECONDS) (DURING SELF-CHECK) 655
b) BUZZER ALWAYS SOUNDS 655
M-20 CONDITION OF MONITOR SWITCHES IS NOT STORED IN MEMORY 656
M-21 ABNORMALITY IN FAILURE DISPLAY MODE 657
a) DOES NOT ENTER FAILURE DISPLAY MODE 657
b) COUNT FOR TIME ELAPSED SINCE FAILURE DISPLAY MODE DOES NOT ADVANCE 657
M-22 BUZZER IS NOT MADE TO SOUND BY TRANSMISSION & JOYSTICK STEERING CONTROLLER 658
M-23 ABNORMALITY IN AUTO-GREASING SYSTEM (OP) 659
a) CHECK POWER SUPPLY SYSTEM 1 (RELAY G1) 659
b) CHECK POWER SUPPLY SYSTEM 2 (RELAY G2) 659
c) FORCED GREASING DOES NOT START 660
d) MONITOR DOES NOT FLASH WHILE GREASE IS BEING SUPPLIED 660
e) MONITOR IS STILL FLASHING AFTER GREASING IS FINISHED, OR IT FLASHES FOR PERIOD SET WITH TIMER WHEN STARTING SWITCH IS TURNED TO ON POSITION 661
M-24 FAILURE CODE IS NOT SENT TO MAIN MONITOR (ABNORMALITY IN NETWORK) (OP) 663
TROUBLESHOOTING OF MAINTENANCE MONITOR SYSTEM (K MODE) 665
ELECTRICAL CIRCUIT DIAGRAM FOR MAINTENANCE MONITOR SYSTEM 666
K-1 WHEN STARTING SWITCH IS TURNED ON, ALL LAMPS ON MAINTENANCE MONITOR DO NOT LIGHT UP FOR 3 SECONDS, MAINTENANCE MONITOR DOES NOT WORK 668
a) NO LAMPS ON MAINTENANCE MONITOR LIGHT UP 668
b) SOME LAMPS DO NOT LIGHT UP 668
K-2 WHEN STARTING SWITCH IS TURNED ON, ALL LAMPS ON MAINTENANCE MONITOR LIGHT UP BUT DO NOT GO OUT (EVEN AFTER 3 SECONDS) 669
K-3 WHEN ENGINE IS STARTED IMMEDIATELY AFTER STARTING SWITCH IS TURNED ON (WITHIN 3 SECONDS), NO LAMPS ON MAINTENANCE MONITOR GO OUT 670
K-4 WHEN STARTING SWITCH IS TURNED ON (ENGINE STOPPED), CHECK ITEMS FLASH 671
a) ENGINE OIL LEVEL DISPLAY FLASHES 671
b) ENGINE WATER LEVEL DISPLAY FLASHES 672
K-5 WHEN STARTING SWITCH IS TURNED ON (ENGINE STARTED), CAUTION ITEMS FLASH 673
a) ENGINE OIL PRESSURE DISPLAY FLASHES 673
b) BATTERY CHARGE LEVEL DISPLAY FLASHES 674
c) BRAKE OIL PRESSURE DISPLAY FLASHES 675
d) AIR CLEANER (R H ) CLOGGING DISPLAY FLASHES 677
e) AIR CLEANER (L H ) CLOGGING DISPLAY FLASHES 678
f) TRANSMISSION OIL FILTER DISPLAY FLASHES 679
K-6 CAUTION ITEMS ARE FLASHING BUT BUZZER DOES NOT SOUND 680
K-7 THERE IS NO ABNORMALITY IN MONITOR DISPLAY BUT CAUTION BUZZER SOUNDS 681
K-8 CAUTION ITEMS ARE FLASHING BUT NEITHER CHECK LAMP NOR CAUTION LAMP FLASHES 682
a) CHECK LAMP 682
b) CAUTION LAMP 682
K-9 THERE IS NO ABNORMALITY IN MAINTENANCE MONITOR DISPLAY BUT CHECK LAMP OR CAUTION LAMP LIGHTS UP 683
a) CHECK LAMP 683
b) CAUTION LAMP 683
K-10 ONLY NIGHT LIGHTING OF MAINTENANCE MONITOR DOES NOT LIGHT UP WHEN LIGHTING SWITCH IS TURNED ON 684
K-11 NIGHT LIGHTING LIGHTS UP EVEN WHEN LIGHTING SWITCH IS TURNED OFF 685
K-12 SERVICE METER DOES NOT WORK 686
K-13 SERVICE METER IS RUNNING EVEN WHEN ENGINE IS STOPPED 686
K-14 ABNORMALITY IN GAUGE DISPLAY 687
a) ABNORMALITY IN FUEL GAUGE 687
b) ABNORMALITY IN ENGINE WATER TEMPERATURE GAUGE 688
c) ABNORMALITY IN TORQUE CONVERTER OIL TEMPERATURE GAUGE 689
TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE) 691
ELECTRICAL CIRCUIT DIAGRAM FOR POWER SUPPLY, ENGINE STARTING, ENGINE STOPPING AND PREHEATING 692
ELECTRICAL CIRCUIT DIAGRAM FOR PARKING BRAKE 694
ELECTRICAL CIRCUIT DIAGRAM FOR BOOM KICK-OUT AND BUCKET POSITIONER 695
E-1 ENGINE DOES NOT START 696
a) STARTING MOTOR DOES NOT TURN 696
b) STARTING MOTOR TURNS (STD SPEC ) 700
E-2 ENGINE DOES NOT STOP (STD SPEC ) 702
E-3 ENGINE STOPS WHEN MACHINE IS TRAVELING (STD SPEC ) 703
E-4 ABNORMALITY IN PREHEATING SYSTEM 705
a) DOES NOT CARRY OUT PREHEATING 705
b) ALWAYS CARRIES OUT PREHEATING FOR 45 SECONDS 706
c) PREHEATING STAYS ON 706
d) PREHEATING TIME BECOMES SHORTER, OR THERE IS FLUCTUATION 707
E-5 PARKING BRAKE DOES NOT HAVE EFFECT 709
a) PARKING BRAKE HAS NO EFFECT WHEN PARKING BRAKE SWITCH IS TURNED ON 709
b) PARKING BRAKE HAS NO EFFECT WHEN BRAKE PRESSURE (ACCUMULATOR PRESSURE) DROPS (DOES NOT WORK AS EMERGENCY BRAKE) 709
E-6 PARKING BRAKE IS APPLIED WHEN MACHINE IS TRAVELING 710
E-7 PARKING BRAKE IS RELEASED WHEN STARTING SWITCH IS TURNDED ON 712
E-8 TRANSMISSION DOES NOT CHANGE TO NEUTRAL WHEN PARKING BRAKE IS APPLIED (BUT PARKING BRAKE WORKS NORMALLY) 712
E-9 KICK-DOWN SWITCH DOES NOT WORK 714
a) KICK-DOWN SWITCH DOES NOT WORK EVEN THOUGH GEAR SHIFT WORKS NORMALLY 714
b) KICK-DOWN CANNOT BE CANCELED 715
E-10 BOOM KICK-OUT DOES NOT WORK 716
E-11 ABNORMALITY IN BUCKET POSITIONER FUNCTION 720
E-12 ABNORMALITY IN LIGHTING UP OF FRONT WORKING LAMP 723
E-13 ABNORMALITY IN LIGHTING UP OF REAR WORKING LAMP 723
E-14 ABNORMALITY IN TRANSMISSION CUT-OFF 723
E-15 ABNORMALITY IN LOW IDLING SELECTION 723
E-16 ABNORMALITY IN PARKING BRAKE DRAGGING WARNING 723
E-17 ABNORMALITY IN BUZZER 723
TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (H MODE) 725
H-1 MACHINE DOES NOT MOVE 726
H-2 MACHINE LACKS POWER OR SPEED (EVERY SPEED RANGE) 727
H-3 EXCESSIVE TIME LAG WHEN STARTING MACHINE OR SHIFTING GEAR 728
H-4 TORQUE CONVERTER OIL TEMPERATURE IS HIGH 729
H-5 STEERING DOES NOT TURN 730
STEERING WHEEL SPECIFICATION 730
H-6 STEERING DOES NOT TURN 731
STEERING WHEEL AND JOYSTICK STEERING SPECIFICATION 731
H-7 STEERING DOES NOT TURN 732
AJSS (ADVANCED JOYSTICK STEERING SYSTEM) SPECIFICATION 732
H-8 TURNING, RESPONSE OF STEERING IS POOR 733
STEERING WHEEL SPECIFICATION 733
H-9 TURNING, RESPONSE OF STEERING IS POOR 734
STEERING WHEEL AND JOYSTICK STEERING SPECIFICATION 734
H-10 TURNING, RESPONSE OF STEERING IS POOR 735
AJSS (ADVANCED JOYSTICK STEERING SYSTEM) SPECIFICATION 735
H-11 STEERING IS HEAVY 736
STEERING WHEEL SPECIFICATION 736
H-12 JOYSTICK LEVER IS HEAVY 736
STEERING WHEEL AND JOYSTICK STEERING SPECIFICATION 736
H-13 JOYSTICK LEVER IS HEAVY 737
AJSS (ADVANCED JOYSTICK STEERING SYSTEM) SPECIFICATION 737
H-14 STEERING WHEEL SHAKES OR JERKS 738
STEERING WHEEL SPECIFICATION 738
H-15 STEERING WHEEL SHAKES OR JERKS 739
STEERING WHEEL AND JOYSTICK STEERING SPECIFICATION 739
H-16 STEERING WHEEL SHAKES OR JERKS 740
AJSS (ADVANCED JOYSTICK STEERING SYSTEM) SPECIFICATION 740
H-17 MINIMUM TURNING RADII TO RIGHT AND LEFT ARE DIFFERENT 741
STEERING WHEEL SPECIFICATION, STEERING WHEEL AND JOYSTICK STEERING SPECIFICATION 741
H-18 MINIMUM TURNING RADII TO RIGHT AND LEFT ARE DIFFERENT 741
AJSS (ADVANCED JOYSTICK STEERING SYSTEM) SPECIFICATION 741
H-19 WHEEL BRAKES DO NOT WORK OR BRAKING EFFECT IS POOR 742
H-20 WHEEL BRAKES ARE NOT RELEASED OR BRAKES DRAG 743
H-21 BOOM DOES NOT RISE 744
H-22 BOOM MOVES SLOWLY OR DOES NOT HAVE SUFFICIENT LIFTING POWER 745
H-23 WHEN RAISING BOOM, BECOMES SLOW AT CERTAIN HEIGHT 746
H-24 BOOM CYLINDER CANNOT HOLD DOWN BUCKET 746
H-25 BOOM HAS LARGE AMOUNT OF HYDRAULIC DRIFT 746
H-26 BOOM FLUCTUATES WHILE WORKING 747
H-27 BOOM DROPS MOMENTARILY WHEN LEVER IS OPERATED FROM HOLD TO RAISE 747
H-28 BUCKET DOES NOT TILT BACK 748
H-29 BUCKET MOVES SLOWLY OR HAS INSUFFICIENT TILT BACK POWER 749
H-30 BUCKET MOVEMENT BECOMES SLOW DURING TILT BACK 750
H-31 BUCKET CYLINDER CANNOT HOLD DOWN BUCKET 750
H-32 BUCKET HAS LARGE AMOUNT OF HYDRAULIC DRIFT 750
H-33 BUCKET FLUCTUATES WHILE TRAVELING UNDER LOAD (WORK EQUIPMENT VALVE “HOLD”) 751
H-34 BUCKET DUMPS MOMENTARILY WHEN LEVER IS OPERATED FROM HOLD TO TILT 751
H-35 BOOM AND BUCKET LEVERS DO NOT MOVE SMOOTHLY 752
TROUBLESHOOTING OF JOYSTICK STEERING CONTROL SYSTEM (J MODE) 753
JUDGEMENT TABLE FOR JOYSTICK STEERING CONTROL SYSTEM RELATED PARTS 754
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE 756
ELECTRICAL CIRCUIT DIAGRAM FOR JOYSTICK STEERING CONTROL SYSTEM 760
J-1 FAILURE CODE [56] (SHORT CIRCUIT, DISCONNECTION IN CAUTION RELAY OUTPUT) IS DISPLAYED 762
J-2 FAILURE CODE [57] (SHORT CIRCUIT IN STEERING RIGHT SOLENOID (DETECTED WHEN SIGNAL IS OUTPUT)) IS DISPLAYED 763
J-3 FAILURE CODE [58] (SHORT CIRCUIT IN STEERING LEFT SOLENOID (DETECTED WHEN SIGNAL IS OUTPUT)) IS DISPLAYED 764
J-4 FAILURE CODE [59] (SHORT CIRCUIT IN STEERING RIGHT SOLENOID (POWER SUPPLY SIDE)) IS DISPLAYED 765
J-5 FAILURE CODE [60] (SHORT CIRCUIT IN STEERING LEFT SOLENOID (POWER SUPPLY SIDE)) IS DISPLAYED 766
J-6 FAILURE CODE [61] (SHORT CIRCUIT, DISCONNECTION IN STEERING SOLENOID CUT RELAY OUTPUT) IS DISPLAYED 767
J-7 FAILURE CODE [62] (SHORT CIRCUIT, DISCONNECTION IN JOYSTICK STEERING NEUTRAL CIRCUIT) IS DISPLAYED 768
J-8 FAILURE CODE [63] (SHORT CIRCUIT, DISCONNECTION IN JOYSTICK STEERING LEVER POTENTIOMETER) IS DISPLAYED 769
J-9 ABNORMALITY IN POWER SUPPLY, POWER SUPPLY VOLTAGE 770
J-10 ABNORMALITY IN JOYSTICK STEERING ON-OFF CIRCUIT 771
J-11 DISCONNECTION IN STEERING RIGHT SOLENOID 772
J-12 DISCONNECTION IN STEERING LEFT SOLENOID 773
TROUBLESHOOTING OF AJSS (ADVANCED JOYSTICK STEERING SYSTEM) CONTROL SYSTEM (A MODE) 775
JUDGEMENT TABLE FOR AJSS (ADVANCED JOYSTICK STEERING SYSTEM) CONTROL SYSTEM 776
OPERATIONS OF CONTROLLER AGAINST ABNORMALITY AND CONDITIONS OF MACHINE CAUSED BY ABNORMALITY 778
ELECTRIC CIRCUIT DIAGRAM RELATED TO AJSS (ADVANCED JOYSTICK STEERING SYSTEM) CONTROL 782
A-1 ERROR CODE [56] (DISCONNECTION OR SHORT CIRCUIT WITH CHASSIS GROUND IN CAUTION BUZZER RELAY SYSTEM) IS DISPLAYED 784
A-2 ERROR CODE [57] (DISCONNECTION OR SHORT CIRCUIT WITH CHASSIS GROUND IN STEERING LEVER ANGLE SENSOR SYSTEM) IS DISPLAYED 785
A-3 ERROR CODE [58] (DEVIATION OF STEERING LEVER ANGLE SENSOR AND FRAME ANGLE SENSOR SIGNALS) IS DISPLAYED 786
A-4 ERROR CODE [59] (DISCONNECTION OR SHORT CIRCUIT WITH CHASSIS GROUND IN FRAME ANGLE SENSOR SYSTEM) IS DISPLAYED 787
A-5 ERROR CODE [60] (DISCONNECTION OR SHORT CIRCUIT WITH CHASSIS GROUND IN STEERING LEVER LOCK PRESSURE SWITCH SYSTEM) IS DISPLAYED 788
A-6 ERROR CODE [62] (DISCONNECTION OR SHORT CIRCUIT WITH CHASSIS GROUND IN STEERING NEUTRAL INTERLOCK RELAY SYSTEM) IS DISPLAYED 789
A-7 ERROR CODE [63] (DISCONNECTION, SHORT CIRCUIT WITH CHASSIS GROUND, OR SHORT CIRCUIT WITH POWER SOURCE IN STEERING MAIN PRESSURE CONTROL EPC SOLENOID SYSTEM) IS DISPLAYED 790
A-8 STEERING SPEEDS IN BOTH DIRECTIONS ARE DIFFERENT 791
A-9 ABNORMALITY IN CONSOLE SWITCH (ADJUSTMENT OF STEERING LEVER ANGLE SENSOR AND FRAME ANGLE SENSOR IS IMPOSSIBLE) 792
A-10 ABNORMALITY IN POWER SOURCE AND VOLTAGE 793
30 DISASSEMBLY AND ASSEMBLY 795
HOW TO READ THIS MANUAL 797
STANDARD TIGHTENING TORQUE TABLE 799
PRECAUTIONS WHEN CARRYING OUT OPERATION 803
METHOD OF DISASSEMBLING AND CONNECTING PUSH-PULL TYPE COUPLER 806
COATING MATERIALS LIST 809
SPECIAL TOOL LIST 812
SKETCHES OF SPECIAL TOOLS 819
STARTING MOTOR 827
REMOVAL AND INSTALLATION 827
ALTERNATOR 828
REMOVAL AND INSTALLATION 828
ENGINE OIL COOLER 829
REMOVAL AND INSTALLATION 829
FUEL INJECTION PUMP FOR LEFT BANK 830
REMOVAL AND INSTALLATION (WITH GOVERNOR) 830
FUEL INJECTION PUMP FOR RIGHT BANK 831
REMOVAL AND INSTALLATION (WHTHOUT GOVERNOR) 831
WATER PUMP 832
REMOVAL AND INSTALLATION 832
NOZZLE HOLDER 833
REMOVAL AND INSTALLATION 833
TURBOCHARGER 834
REMOVAL AND INSTALLATION 834
ENGINE FRONT SEAL 835
REMOVAL AND INSTALLATION 835
ENGINE REAR SEAL 837
REMOVAL AND INSTALLATION 837
CYLINDER HEAD 839
REMOVAL 839
INSTALLATION 843
RADIATOR 846
REMOVAL 846
INSTALLATION 849
ENGINE 850
REMOVAL 850
INSTALLATION 856
DAMPER 857
REMOVAL AND INSTALLATION 857
DISASSEMBLY 858
ASSEMBLY 860
TORQUE CONVERTER AND TRANSMISSION ASSEMBLY 864
REMOVAL 864
INSTALLATION 871
TORQUE CONVERTER 873
DISASSEMBLY 873
ASSEMBLY 877
TORQUE CONVERTER VALVE 882
DISASSEMBLY AND ASSEMBLY 882
TRANSMISSION 883
DISASSEMBLY 883
ASSEMBLY 900
TRANSMISSION VALVE 918
REMOVAL AND INSTALLATION 918
DISASSEMBLY AND ASSEMBLY 919
TRANSFER 923
DISASSEMBLY 923
ASSEMBLY 931
PTO 943
DISASSEMBLY 943
ASSEMBLY 945
CENTER SUPPORT 948
REMOVAL 948
INSTALLATION 949
DISASSEMBLY 950
ASSEMBLY 952
DRIVE SHAFT 955
DISASSEMBLY 955
ASSEMBLY 957
FRONT AXLE 959
REMOVAL 959
INSTALLATION 961
REAR AXLE 962
REMOVAL 962
INSTALLATION 968
DIFFERENTIAL 969
REMOVAL 969
INSTALLATION 971
DISASSEMBLY 972
ASSEMBLY 976
FINAL DRIVE 982
DISASSEMBLY 982
ASSEMBLY 985
ORBIT-ROLL 990
REMOVAL 990
INSTALLATION 991
EMERGENCY STEERING PUMP 992
REMOVAL AND INSTALLATION 992
DIVERTER VALVE 993
REMOVAL AND INSTALLATION 993
DISASSEMBLY 994
ASSEMBLY 995
ACCUMULATOR CHARGE VALVE 997
REMOVAL AND INSTALLATION 997
DISASSEMBLY 998
ASSEMBLY 999
STEERING STOP VALVE 1001
REMOVAL AND INSTALLATION 1001
STEERING CYLINDER 1002
REMOVAL 1002
INSTALLATION 1003
STEERING VALVE 1008
REMOVAL 1008
INSTALLATION 1009
BRAKE VALVE 1010
REMOVAL AND INSTALLATION 1010
SLACK ADJUSTER 1011
REMOVAL AND INSTALLATION 1011
DISASSEMBLY 1012
ASSEMBLY 1013
BRAKE 1014
REMOVAL AND INSTALLATION 1014
DISASSEMBLY 1015
ASSEMBLY 1018
PARKING BRAKE CALIPERS 1022
REMOVAL AND INSTALLATION 1022
DISASSEMBLY 1023
ASSEMBLY 1025
PARKING BRAKE PAD 1027
REMOVAL AND INSTALLATION 1027
PARKING BRAKE SPRING CYLINDER 1028
REMOVAL AND INSTALLATION 1028
BRAKE OIL TANK 1029
REMOVAL AND INSTALLATION 1029
HYDRAULIC PUMP 1030
REMOVAL 1030
INSTALLATION 1032
SERVO CYLINDER 1033
REMOVAL AND INSTALLATION 1033
HYDRAULIC TANK AND FILTER CASE ASSEMBLY 1034
REMOVAL 1034
INSTALLATION 1035
PPC VALVE 1036
REMOVAL 1036
INSTALLATION 1037
DISASSEMBLY AND ASSEMBLY 1038
WORK EQUIPMENT CONTROL VALVE 1039
REMOVAL 1039
INSTALLATION 1040
DISASSEMBLY 1041
ASSEMBLY 1043
CAB 1045
REMOVAL 1045
INSTALLATION 1047
FLOOR FRAME 1048
REMOVAL 1048
INSTALLATION 1050
CENTER HINGE PIN 1051
REMOVAL 1051
INSTALLATION 1057
WORK EQUIPMENT 1063
REMOVAL 1063
INSTALLATION 1068
BOOM FRONT END BUSH 1069
REPLACEMENT 1069
BUCKET CYLINDER 1070
REMOVAL AND INSTALLATION 1070
LIFT CYLINDER 1071
REMOVAL 1071
INSTALLATION 1072
HYDRAULIC CYLINDER 1073
DISASSEMBLY 1073
ASSEMBLY 1075
AIR CONDITIONER UNIT 1077
REMOVAL 1077
INSTALLATION 1078
AIR CONDITIONER COMPRESSOR 1079
REMOVAL AND INSTALLATION 1079
RECEIVER TANK 1080
REMOVAL AND INSTALLATION 1080
AIR CONDITIONER CONDENSER 1081
REMOVAL AND INSTALLATION 1081
TRANSMISSION AND STEERING CONTROLLER 1082
REMOVAL AND INSTALLATION 1082
MAIN MONITOR 1083
REMOVAL 1083
INSTALLATION 1084
FUEL TANK 1085
REMOVAL 1085
INSTALLATION 1086
COUNTERWEIGHT 1087
REMOVAL AND INSTALLATION 1087
AJSS LEVER SWITCH ASSEMBLY 1088
REMOVAL 1088
INSTALLATION 1091
40 MAINTENANCE STANDARD 1097
ENGINE MOUNT 1098
TRANSMISSION MOUNT 1099
DAMPER 1100
TORQUE CONVERTER CHARGING, PPC AND BRAKE PUMP 1102
TORQUE CONVERTER 1104
TORQUE CONVERTER REGULATOR VALVE 1105
TRANSMISSION 1106
TRANSFER 1109
TRANSMISSION CONTROL VALVE 1112
DRIVE SHAFT 1117
CENTER SUPPORT 1118
DIFFERENTIAL 1119
FINAL DRIVE 1122
AXLE MOUNT 1124
CENTER HINGE PIN 1126
STEERING COLUMN 1128
STEERING DEMAND VALVE 1130
DIVERTER VALVE 1132
STEERING CYLINDER MOUNT 1133
EMERGENCY STEERING PUMP 1134
BRAKE VALVE 1136
SLACK ADJUSTER 1140
BRAKE 1142
PARKING BRAKE 1144
PPC VALVE 1146
PPC RELIEF VALVE 1148
STEERING PUMP 1149
SWITCH PUMP 1151
MAIN PISTON PUMP 1153
CONTROL PUMP (BAR025) 1155
COOLING FAN MOTOR 1157
MAIN CONTROL VALVE 1158
HYDRAULIC CYLINDER 1162
BUCKET LINKAGE 1164
BUCKET POSITIONER AND BOOM KICK-OUT 1166
BRAKE COOLING PUMP 1167
90 OTHERS 1169
ELECTRIC CIRCUIT DIAGRAM [1/22] 1171
ELECTRIC CIRCUIT DIAGRAM [2/22] 1173
ELECTRIC CIRCUIT DIAGRAM [3/22] 1175
ELECTRIC CIRCUIT DIAGRAM [4/22] 1177
ELECTRIC CIRCUIT DIAGRAM [5/22] 1179
ELECTRIC CIRCUIT DIAGRAM [6/22] 1181
ELECTRIC CIRCUIT DIAGRAM [7/22] 1183
ELECTRIC CIRCUIT DIAGRAM [8/22] 1185
ELECTRIC CIRCUIT DIAGRAM [9/22] 1187
ELECTRIC CIRCUIT DIAGRAM [10/22] 1189
ELECTRIC CIRCUIT DIAGRAM [11/22] 1191
ELECTRIC CIRCUIT DIAGRAM [12/22] 1193
ELECTRIC CIRCUIT DIAGRAM [13/22] 1195
ELECTRIC CIRCUIT DIAGRAM [14/22] 1197
ELECTRIC CIRCUIT DIAGRAM [15/22] 1199
ELECTRIC CIRCUIT DIAGRAM [16/22] 1201
ELECTRIC CIRCUIT DIAGRAM [17/22] 1203
ELECTRIC CIRCUIT DIAGRAM [18/22] 1205
ELECTRIC CIRCUIT DIAGRAM [19/22] 1207
ELECTRIC CIRCUIT DIAGRAM [20/22] 1209
ELECTRIC CIRCUIT DIAGRAM [21/22] 1211
ELECTRIC CIRCUIT DIAGRAM [22/22] 1213
ELECTRIC CIRCUIT DIAGRAM (AUTO-GREASING SPECIFICATION) 1215
WITH ELECTRONIC GOVERNOR 1217
TROUBLESHOOTING OF ELECTRONIC GOVERNOR SYSTEM (G MODE) 1219
JUDGEMENT TABLE FOR ENGINE CONTROLLER AND ENGINE RELATED PARTS 1220
ACTION TAKEN BY CONTROLLER AND CONDITION OF MACHINE WHEN ABNORMALITY OCCURS 1222
ACTION TAKEN BY CONTROLLER AND CONDITIONS FOR RESETTING WHEN ABNORMALITY OCCURS 1230
POINTS TO REMEMBER WHEN CARRYING OUT TROUBLESHOOTING OF ENGINE CONTROLLER SYSTEM 1231
JUDGEMENT TABLE FOR ENGINE CONTROLLER 1233
G-1 [90] [OFF OR 10] ABNORMALITY IN POWER SOURCE SYSTEM 1234
G-2 [90] [11] ABNORMALITY IN CONTROLLER SYSTEM 1234
G-3 [90] [21] MISTAKEN CONNECTION OF CONNECTOR 1235
G-4 [90] [56] ABNORMALITY IN RIGHT BANK SOLENOID POWER SOURCE SYSTEM 1235
G-5 [90] [57] ABNORMALITY IN LEFT BANK SOLENOID POWER SOURCE SYSTEM 1235
G-6 [90] [58] ABNORMALITY IN BACK-UP POWER SOURCE SYSTEM 1236
G-7 [90] [59] ABNORMALITY IN SWITCH POWER SOURCE SYSTEM 1237
G-8 [91] [14] ABNORMALITY IN RIGHT BANK GOVERNOR SOLENOID SYSTEM 1238
G-9 [91] [15] ABNORMALITY IN LEFT BANK GOVERNOR SOLENOID SYSTEM 1239
G-10 [91] [16] ABNORMALITY IN RIGHT BANK GOVERNOR CUT RELAY SYSTEM 1240
G-11 [91] [17] ABNORMALITY IN LEFT BANK GOVERNOR CUT RELAY SYSTEM 1241
G-12 [91] [19] ABNORMALITY IN RIGHT BANK GOVERNOR SERVO SYSTEM 1242
G-13 [91] [1A] ABNORMALITY IN LEFT BANK GOVERNOR SERVO SYSTEM 1243
G-14 [91] [1d] ABNORMALITY IN RIGHT BANK PRE-STROKE SOLENOID SYSTEM 1244
G-15 [91] [1E] ABNORMALITY IN LEFT BANK PRE-STROKE SOLENOID SYSTEM 1245
G-16 [92] [12] ABNORMALITY IN RIGHT BANK RACK SENSOR SYSTEM 1246
G-17 [92] [13] ABNORMALITY IN LEFT BANK RACK SENSOR SYSTEM 1247
G-18 [92] [18] ABNORMALITY IN RACK SENSOR POWER SOURCE SYSTEM 1248
G-19 [93] [1b] ABNORMALITY IN ENGINE SPEED SENSOR A SYSTEM 1249
G-20 [94] [1c] ABNORMALITY IN ENGINE SPEED SENSOR B SYSTEM 1250
G-21 [93, 94] [1b, 1c] ABNORMALITY IN ENGINE SPEED SENSOR A, B SYSTEM 1251
G-22 [95] [40] ABNORMALITY IN ENGINE WATER TEMPERATURE SENSOR SYSTEM 1251
G-23 [97] [31] ABNORMALITY IN ACCELERATOR SENSOR SYSTEM 1252
G-24 [98] [18] ABNORMALITY IN MODEL SELECTION 1254
G-25 [99] [22] ENGINE OVERRUN 1255
G-26 ENGINE DOES NOT START 1255
G-27 ENGINE DOES NOT STOP 1259

DESCRIPTION:

Komatsu WA900-3 Loader Shop Manual SEBM013519 – PDF DOWNLOAD 

MACHINE MODEL    SERIAL NO.
WA900-3                      50001 and up

GENERAL PRECAUTIONS :

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

PREPARATIONS FOR WORK:

S.V 26/12/24