Komatsu WA900-3 Avance Loader Shop Manual SEBM013522 PDF

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Komatsu WA900-3 Avance Loader Shop Manual SEBM013522 – PDF DOWNLOAD

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Komatsu WA900-3 Avance Loader Shop Manual SEBM013522 – PDF DOWNLOAD 

Language : English
Pages : 1258
Downloadable : Yes
File Type : PDF

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Komatsu WA900-3 Avance Loader Shop Manual SEBM013522 – PDF DOWNLOAD 

MACHINE MODEL    SERIAL NO.
WA900-3                        50001 and up

COVER 1
CONTENTS 2
01 GENERAL 23
GENERAL ASSEMBLY DRAWING 24
SPECIFICATIONS 25
WEIGHT TABLE 28
LIST OF LUBRICANT AND WATER 30
10 STRUCTURE AND FUNCTION 33
POWER TRAIN 34
POWER TRAIN SYSTEM 35
ENGINE CONTROL 38
SERVO CYLINDER 39
RADIATOR AND COOLER 43
DAMPER 46
TORQUE CONVERTER AND TRANSMISSION PIPING 47
TRANSMISSION HYDRAULIC SYSTEM DIAGRAM 48
TRANSMISSION HYDRAULIC CIRCUIT DIAGRAM 49
TORQUE CONVERTER 50
TRANSMISSION 55
TRANSFER 65
TRANSMISSION CONTROL VALVE 66
TORQUE CONVERTOR OIL COOLER 84
DRIVE SHAFT 85
CENTER SUPPORT 86
AXLE 87
FINAL DRIVE 92
AXLE MOUNT 94
CENTER HINGE PIN 96
TIRE AND WHEEL 97
STEERING PIPING DIAGRAM 98
STEERING COLUMN 101
JOYSTICK LINKAGE 102
STEERING PUMP 104
SWITCH PUMP 111
STEERING DEMAND VALVE 123
STEERING UNIT (ORBIT-ROLL VALVE) 134
PROPORTIONAL SOLENOID VALVE 137
EPC VALVE 138
ROTARY VALVE 139
TOW-WAY RESTRICTOR VALVE 143
DIVERTER VALVE 144
BRAKE PIPING 148
BRAKE CIRCUIT DIAGRAM 150
BRAKE VALVE 154
CHARGE VALVE 165
ACCUMULATOR (FOR BRAKE) 169
SLACK ADJUSTER 170
BRAKE 173
PARKING BRAKE 174
SPRING CYLINDER 178
PARKING BRAKE SOLENOID VALVE 179
HYDRAULIC PIPING 180
WORK EQUIPMENT HYDRAULIC CIRCUIT DIAGRAM 184
WORK EQUIPMENT LEVER LINKAGE 199
HYDRAULIC TANK 200
MAIN PISTON PUMP 203
ES VALVE (ENGINE SENSING VALVE) 215
SERVO VALVE 217
PPC VALVE (PROPORTIONAL PRESSURE VALVE) 220
PPC RELIEF VALVE 224
ACCUMULATOR (FOR PPC VALVE) 225
MAIN CONTROL VALVE 226
COOLING FAN HYDRAULIC PIPING 251
COOLING FAN HYDRAULIC CIRCUIT DIAGRAM 252
PRIORITY VALVE 253
COOLING FAN MOTOR 254
LUBRICATION OF WORK EQUIPMENT 258
WORK EQUIPMENT LINKAGE 260
BUCKET POSITIONER AND BOOM KICK-OUT 262
OPERATION OF PROXIMITY SWITCH 264
CAB 268
ROPS CANOPY 269
AIR CONDITIONER 270
ELECTRIC CIRCUIT DIAGRAM 273
MACHINE MONITOR SYSTEM 276
MAIN MONITOR 278
MAINTENANCE MONITOR 284
MULTI MONITOR SYSTEM (IF EQUIPPED) 286
ENGINE STARTING CIRCUIT 308
ENGINE STOP CIRCUIT 311
PREHEATING CIRCUIT 312
ELECTRICAL TRANSMISSION CONTROL 313
KICK-DOWN, HOLD SWITCH 316
JOYSTICK STEERING SYSTEM 317
TRANSMISSION AND JOYSTICK STEERING CONTROLLER 320
AJSS (ADVANCED JOYSTICK STEERING SYSTEM) 322
TRANSMISSION AND JOYSTICK STEERING CONTROLLER 326
ELECTRIC PARKING BRAKE CONTROL 329
BRAKE COOLING SYSTEM (IF EQUIPPED) 338
55℃ SPECIFICATION 348
EMERGENCY ENGINE STOP (FOR RIO TINTO) 352
HYDRAULIC OIL LEVEL SENSOR (FOR RIO TINTO) 355
BATTERY AND STARTER ISOLATOR, BATTERY JUMP START (FOR RIO TINTO) 358
20 TESTING AND ADJUSTING 361
STANDARD VALUE TABLE FOR ENGINE 362
STANDARD VALUE TABLE FOR CHASSIS 363
STANDARD VALUE TABLE FOR ELECTRICAL PARTS 371
TESTING AND ADJUSTING 389
TABLE OF TOOLS FOR TESTING, ADJUSTING, AND TROUBLESHOOTING 390
MEASURING ENGINE SPEED 393
MEASURING EXHAUST GAS COLOR 395
ADJUSTING VALVE CLEARANCE 396
MEASURING COMPRESSION PRESSURE 397
MEASURING BLOW-BY PRESSURE 398
TESTING AND ADJUSTING FUEL INJECTION TIMING 399
MEASURING ENGINE OIL PRESSURE 401
MEASURING EXHAUST TEMPERATURE 402
MEASURING AIR SUPPLY PRESSURE (BOOST PRESSURE) 403
TESTING AND ADJUSTING ALTERNATOR BELT TENSION 404
TESTING AND ADJUSTING BELT TENSION FOR AIR CONDITIONER COMPRESSOR 405
MEASURING ACCELERATOR PEDAL OPERATING EFFORT 406
MEASURING ACCELERATOR PEDAL OPERATING ANGLE 407
ADJUSTING FUEL CONTROL CABLE, LINKAGE, AND SERVO CYLINDER 408
ADJUSTING ENGINE STOPPING MOTOR CABLE 410
TESTING OF UPPER DRIVE SHAFT SLIDING PART 412
TESTING AND ADJUSTING TORQUE CONVERTER AND TRANSMISSION OIL PRESSURE 414
PROCEDURE FOR OPERATING EMERGENCY STEERING SPOOL WHEN TRANSMISSION VALVE FAILS 417
TESTING AND ADJUSTING STEERING OIL PRESSURE 419
TESTING AND ADJUSTING EMERGENCY STEERING OIL PRESSURE 420
BLEEDING AIR FROM STEERING CIRCUIT 422
TESTING AND ADJUSTING STEERING STOP VALVE 423
TESTING AND ADJUSTING STEERING STOPPER BOLT 424
TESTING AND ADJUSTING STEERING LEVER ANGLE SENSOR AND FRAME ANGLE SENSOR 425
TESTING WHEEL BRAKE PERFORMANCE 426
TESTING WHEEL BRAKE OIL PRESSURE DROP 427
MEASURING WEAR OF WHEEL BRAKE DISC 429
TESTING AND ADJUSTING ACCUMULATOR CHARGE CUT-IN AND CUT-OUT PRESSURE 430
TESTING OF ACCUMULATOR NITROGEN GAS PRESSURE AND PROCEDURE FOR CHARGING ACCUMULATOR WITH NITROGEN GAS 432
BLEEDING AIR FROM WHEEL BRAKE CIRCUIT 444
TESTING PARKING BRAKE PERFORMANCE 445
MEASURING PARKING BRAKE SOLENOID OUTPUT PRESSURE 446
CHECKING AND ADJUSTING PARKING BRAKE PAD 447
TESTING AND ADJUSTING PPC PRESSURE 449
ADJUSTING PPC VALVE LINKAGE 451
TESTING AND ADJUSTING WORK EQUIPMENT HYDRAULIC PRESSURE 452
BLEEDING AIR FROM PISTON PUMP 454
BLEEDING AIR FROM WORK EQUIPMENT CIRCUIT 455
ADJUSTING WORK EQUIPMENT LEVER LINKAGE 456
RELEASING REMAINING PRESSURE IN HYDRAULIC CIRCUIT 458
TESTING AND ADJUSTING BUCKET PROXIMITY SWITCH 459
TESTING AND ADJUSTING BOOM PROXIMITY SWITCH 460
TESTING PROXIMITY ACTUATION PILOT LAMP 461
ADJUSTING SPEEDOMETER MODULE OF MAIN MONITOR 462
ADJUSTING JOYSTICK LEVER POTENTIOMETER 463
ADJUSTING JOYSTICK LEVER NEUTRAL DETECTION SWITCH 464
TROUBLESHOOTING 465
POINTS TO REMEMBER WHEN TROUBLESHOOTING 466
SEQUENCE OF EVENTS IN TROUBLESHOOTING 467
POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE 468
CHECKS BEFORE TROUBLESHOOTING 476
TYPES AND LOCATIONS OF CONNECTORS 477
CONNECTOR ARRANGEMENT DIAGRAM 484
WIRING TABLE FOR CONNECTOR PIN NUMBERS 491
T-ADAPTER BOX AND T-ADAPTER TABLE 524
EXPLANATION OF FUNCTIONS OF ELECTRIC CONTROL MECHANISM 527
METHOD OF DISPLAYING ACTION CODE AND FAILURE CODE 532
CHART OF ACTION CODES AND FAILURE CODES, AND RE-ENACTION 534
TRANSMISSION CONTROLLER LED DISPLAY 539
METHOD OF USING JUDGEMENT TABLE 541
METHOD OF USING TROUBLESHOOTING CHARTS 542
METHOD OF USING MATRIX TROUBLESHOOTING TABLES 544
TROUBLESHOOTING OF ENGINE SYSTEM (S MODE) 547
METHOD OF USING TROUBLESHOOTING CHARTS 548
S-1 STARTING PERFORMANCE IS POOR (STARTING ALWAYS TAKES TIME) 552
S-2 ENGINE DOES NOT START 553
① ENGINE DOES NOT TURN 553
② ENGINE TURNS BUT NO EXHAUST GAS COMES OUT (FUEL IS NOT BEING INJECTED) 554
③ EXHAUST GAS COMES OUT BUT ENGINE DOES NOT START (FUEL IS BEING INJECTED) 555
S-3 ENGINE DOES NOT PICK UP SMOOTHLY (FOLLOW-UP IS POOR) 556
S-4 ENGINE STOPS DURING OPERATIONS 557
S-5 ENGINE DOES NOT ROTATE SMOOTHLY (HUNTING) 558
S-6 ENGINE LACKS UOTPUT (NO POWER) 559
S-7 EXHAUST GAS IS BLACK (INCOMPLETE COMBUSTION) 560
S-8 OIL CONSUMPTION IS EXCESSIVE (OR EXHAUST GAS IS BLUE) 561
S-9 OIL BECOMES CONTAMINATED QUICKLY 562
S-10 FUEL CONSUMPTION IS EXCESSIVE 563
S-11 OIL IS IN COOLING WATER, OR WATER SPURTS BACK, OR WATER LEVEL GOES DOWN 564
S-12 OIL PRESSURE LAMP LIGHTS UP (DROP IN OIL PRESSURE) 565
S-13 OIL LEVEL RISES 566
S-14 WATER TEMPERATURE BECOMES TOO HIGH (OVERHEATING) 567
S-15 ABNORMAL NOISE IS MADE 568
S-16 VIBRATION IS EXCESSIVE 569
TROUBLESHOOTING OF TRANSMISSION CONTROL SYSTEM (T MODE) 571
JUDGEMENT TABLE FOR TRANSMISSION CONTROL SYSTEM RELATED PARTS 572
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE 574
ELECTRICAL CIRCUIT DIAGRAM FOR TRANSMISSION CONTROL SYSTEM 582
T-1 FAILURE CODE [10] (SHORT CIRCUIT, DISCONNECTION, SHORT CIRCUIT WITH POWER SOURCE IN BACKUP LAMP RELAY) IS DISPLAYED 586
STEERING WHEEL SPECIFICATION, STEERING WHEEL AND JOYSTICK STEERING SPECIFICATION 586
T-2 FAILURE CODE [10] (SHORT CIRCUIT, DISCONNECTION, SHORT CIRCUIT WITH POWER SOURCE IN BACKUP LAMP RELAY) IS DISPLAYED 587
AJSS (ADVANCED JOYSTICK STEERING SYSTEM) SPECIFICATION 587
T-3 FAILURE CODE [12] (SHORT CIRCUIT, DISCONNECTION, SHORT CIRCUIT WITH POWER SOURCE IN F SOLENOID) IS DISPLAYED 588
T-4 FAILURE CODE [13] (SHORT CIRCUIT, DISCONNECTION, SHORT CIRCUIT WITH POWER SOURCE IN R SOLENOID) IS DISPLAYED 589
T-5 FAILURE CODE [14] (SHORT CIRCUIT, DISCONNECTION, SHORT CIRCUIT WITH POWER SOURCE IN 1ST SOLENOID) IS DISPLAYED 590
T-6 FAILURE CODE [15] (SHORT CIRCUIT, DISCONNECTION, SHORT CIRCUIT WITH POWER SOURCE IN 2ND SOLENOID) IS DISPLAYED 591
T-7 FAILURE CODE [16] (SHORT CIRCUIT, DISCONNECTION, SHORT CIRCUIT WITH POWER SOURCE IN 3RD SOLENOID) IS DISPLAYEED 592
T-8 FAILURE CODE [19] (SHORT CIRCUIT, DISCONNECTION IN JOYSTICK DIRECTIONAL SWITCH SYSTEM) IS DISPLAYED 593
T-9 FAILURE CODE [20] (SHORT CIRCUIT, DISCONNECTION IN DIRECTIONAL SWITCH SYSTEM) IS DISPLAYED 594
STEERING WHEEL SPECIFICATION, STEERING WHEEL AND JOYSTICK STEERING SPECIFICATION 594
T-10 FAILURE CODE [20] (SHORT CIRCUIT OR DISCONNECTION IN JOYSTICK DIRECTIONAL SWITCH SYSTEM) IS DISPLAYED 597
AJSS (ADVANCED JOYSTICK STEERING SYSTEM) SPECIFICATION 597
T-11 FAILURE CODE [21] (SHORT CIRCUIT, DISCONNECTION IN RANGE SWITCH SYSTEM) IS DISPLAYED 598
STEERING WHEEL SPECIFICATION, STEERING WHEEL AND JOYSTICK STEERING SPECIFICATION 598
T-12 FAILURE CODE [21] (SHORT CIRCUIT OR DISCONNECTION IN JOYSTICK SHIFT-UP/SHIFT-DOWN SWITCH SYSTEM) IS DISPLAYED 601
T-13 FAILURE CODE [22] (DISCONNECTION IN TRAVEL SPEED SENSOR) IS DISPLAYED 602
T-14 FAILURE CODE [23] (SHORT CIRCUIT, DISCONNECTION IN ENGINE SPEED SENSOR SYSTEM) IS DISPLAYED 603
T-15 KICKDOWN SWITCH SIGNAL SYSTEM AND HOLD SWITCH SIGNAL SYSTEM 604
T-16 SHIFT-DOWN SWITCH SIGNAL SYSTEM AND SHIFT-UP SWITCH SIGNAL SYSTEM 605
T-17 TRANSMISSION CUT-OFF SIGNAL SYSTEM 606
T-18 NEUTRALIZER SIGNAL SYSTEM 607
T-19 BUZZER SIGNAL SYSTEM 608
T-20 NETWORK SYSTEM 609
T-21 TRANSMISSION CONTROLLER POWER SOURCE SYSTEM 610
T-22 SHORT CIRCUIT IN TRAVEL SPEED SENSOR SYSTEM 611
T-23 ABNORMALITY IN MACHINE SELECTION WIRING HARNESS 612
TROUBLESHOOTING OF MAIN MONITOR SYSTEM (M MODE) 613
TROUBLE DATA DISPLAY 615
ELECTRICAL CIRCUIT DIAGRAM FOR MAIN MONITOR SYSTEM 618
M-1 MAIN MONITOR DOES NOT WORK 620
M-2 WHEN STARTING SWITCH IS TURNED ON (WITHIN 3 SECONDS) AND ENGINE IS STARTED IMMEDIATELY, ALL LAMPS STAY LIGHTED UP 621
M-3 SPEEDOMETER DISPLAY DOES NOT WORK PROPERLY 622
M-4 ABNORMALITY IN SHIFT INDICATOR 623
a) DISPLAYS N EVEN WHEN DIRECTIONAL LEVER IS AT F 623
b) DISPLAYS N EVEN WHEN DIRECTIONAL LEVER IS AT R 623
c) DOES NOT DISPLAY N EVEN WHEN DIRECTIONAL LEVER IS AT N (DISPLAY 1ST-3RD) 624
d) DOES NOT DISPLAY 1ST EVEN WHEN GEAR SHIFT LEVER IS AT 1ST POSITION (DIRECTIONAL LEVER IS AT F OR R POSITION) 624
e) DOES NOT DISPLAY 2ND EVEN WHEN GEAR SHIFT IS AT 2ND POSITION (DIRECTION LEVER IS AT F OR R POSITION) 624
f) DOES NOT DISPLAY 3RD EVEN WHEN THE GEAR SHIFT IS AT 3RD POSITION (DIRECTION LEVER IS AT F OR R POSITION) 625
M-5 HIGH BEAM DISPLAY DOES NOT LIGHT UP 626
M-6 TURN SIGNAL DISPLAY DOES NOT LIGHT UP 627
a) L H TURN SIGNAL DISPLAY DOES NOT LIGHT UP 627
b) R H TURN SIGNAL DISPLAY DOES NOT LIGHT UP 627
M-7 ABNORMALITY IN PARKING DISPLAY 628
a) PARKING LAMP DISPLAY DOES NOT LIGHT UP 628
b) PARKING LAMP DISPLAY STAYS LIGHTED UP 628
M-8 ABNORMALITY IN PREHEATING SYSTEM 629
a) DOES NOT CARRY OUT PREHEATING 629
b) ALWAYS CARRIES OUT PREHEATING FOR 45 SECONDS 630
c) PREHEATING STAYS ON 630
d) PREHEATING TIME BECOMES SHORTER, OR THERE IS VARIATION 631
M-9 NIGHT LIGHTING DOES NOT LIGHT UP 633
M-10 ABNORMALITY IN FRONT WORKING LAMP 634
a) NEITHER MONITOR DISPLAY NOR FRONT WORKING LAMP LIGHT UP 634
b) WORKING LAMP LIGHTS UP BUT MONITOR DISPLAY DOES NOT LIGHT UP 634
c) MONITOR DISPLAY LIGHTS UP BUT FRONT WORKING LAMP DOES NOT LIGHT UP 634
M-11 ABNORMALITY IN REAR WORKING LAMP 636
a) NEITHER MONITOR DISPLAY NOR REAR WORKING LAMP LIGHT UP 636
b) REAR WORKING LAMP LIGHTS UP BUT MONITOR DISPLAY DOES NOT LIGHT UP 636
c) MONITOR DISPLAY LIGHTS UP BUT REAR WORKING LAMP DOES NOT LIGHT UP 636
M-12 ABNORMALITY IN TRANSMISSION CUT-OFF 638
a) WHEN MONITOR SWITCH (TRANSMISSION CUT-OFF SWITCH) IS PRESSED, CUT-OFF FUNCTION IS NOT SWITCHED AND DISPLAY DOES NOT CHANGE 638
b) WHEN MONITOR SWITCH (TRANSMISSION CUT-OFF SWITCH) IS OFF, MONITOR DISPLAY GOES OUT BUT CUT-OFF FUNCTION IS ACTUATED WHEN PEDAL IS DEPRESSED 638
c) WHEN MONITOR DISPLAY IS TURNED OFF (TRANSMISSION CUT-OFF SWITCH TURNED OFF), CUT-OFF FUNCTION IS ALWAYS ACTUATED 638
d) CUT-OFF FUNCTION IS ALWAYS ACTUATED REGARDLESS OF MONITOR DISPLAY (TRANSMISSION CUT-OFF SWITCH ON OR OFF) 638
e) MONITOR DISPLAY LIGHTS UP (TRANSMISSION CUT-OFF SWITCH TURNED ON), BUT CUT-OFF FUNCTION IS NOT ACTUATED 639
M-13 ABNORMALITY IN LOW IDLING SELECTION 640
a) WHEN MONITOR SWITCH (LOW IDLE SELECTOR SWITCH) IS TURNED ON, THE LOW IDLING SPEED DOES NOT RISE AND DISPLAY DOES NOT CHANGE 640
b) WHEN THE MONITOR SWITCH (LOW IDLE SELECTOR SWITCH) IS TURNED ON, THE MONITOR LIGHTS UP BUT THE LOW IDLING SPEED DOES NOT RISE 640
c) WHEN THE MONITOR SWITCH (LOW IDLE SELECTOR SWITCH) IS TURNED OFF, THE MONITOR GOES OFF BUT THE LOW IDLING SPEED DOES NOT LOWER 641
M-14 ABNORMALITY IN EMERGENCY STEERING NORMAL DISPLAY 642
EMERGENCY STEERING NORMAL DISPLAY DOES NOT LIGHT UP 642
M-15 ABNORMALITY IN EMERGENCY STEERING ACTUATION DISPLAY 643
a) EMERGENCY STEERING ACTUATION DISPLAY DOES NOT LIGHT UP 643
b) EMERGENCY STEERING ACTUATION DISPLAY STAYS LIGHTED UP 643
M-16 ABNORMALITY IN PARKING BRAKE DRAGGING WARNING 644
a) WHEN PARKING BRAKE IS APPLIED, BUZZER SOUNDS (INTERMITTENTLY) AND CAUTION LAMP FLASHES EVEN WHEN DIRECTIONAL LEVER IS AT N 644
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 644
M-17 ABNORMALITY IN PARKING BRAKE DRAGGING WARNING (WHEN JOYSTICK STEERING MODE (OP)) 646
a) WHEN PARKING BRAKE IS APPLIED, BUZZER SOUNDS (INTERMITTENTLY) AND CAUTION LAMP FLASHES EVEN WHEN DIRECTIONAL LEVER IS AT N 646
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 646
M-18 WHEN PARKING BRAKE DRAGGING WARNING IS GIVEN, BUZZER AND CAUTION LAMP ARE ACTUATED CONTINUOUSLY, OR THEY ARE NOT ACTUATED 648
a) ACTUATED CONTINUOUSLY 648
b) NOT ACTUATED 648
M-19 ABNORMALITY IN BUZZER 649
a) BUZZER DOES NOT SOUND WHEN STARTING SWITCH IS AT ON (FOR 3 SECONDS) (DURING SELF-CHECK) 649
b) BUZZER ALWAYS SOUNDS 649
M-20 CONDITION OF MONITOR SWITCHES IS NOT STORED IN MEMORY 650
M-21 ABNORMALITY IN FAILURE DISPLAY MODE 651
a) DOES NOT ENTER FAILURE DISPLAY MODE 651
b) COUNT FOR TIME ELAPSED SINCE FAILURE DISPLAY MODE DOES NOT ADVANCE 651
M-22 BUZZER IS NOT MADE TO SOUND BY TRANSMISSION & JOYSTICK STEERING CONTROLLER 652
M-23 ABNORMALITY IN AUTO-GREASING SYSTEM (OP) 653
a) CHECK POWER SUPPLY SYSTEM 1 (RELAY G1) 653
b) CHECK POWER SUPPLY SYSTEM 2 (RELAY G2) 653
c) FORCED GREASING DOES NOT START 654
d) MONITOR DOES NOT FLASH WHILE GREASE IS BEING SUPPLIED 654
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 655
M-24 FAILURE CODE IS NOT SENT TO MAIN MONITOR (ABNORMALITY IN NETWORK) (OP) 657
TROUBLESHOOTING OF MAINTENANCE MONITOR SYSTEM (K MODE) 659
ELECTRICAL CIRCUIT DIAGRAM FOR MAINTENANCE MONITOR SYSTEM 660
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 662
a) NO LAMPS ON MAINTENANCE MONITOR LIGHT UP 662
b) SOME LAMPS DO NOT LIGHT UP 662
K-2 WHEN STARTING SWITCH IS TURNED ON, ALL LAMPS ON MAINTENANCE MONITOR LIGHT UP BUT DO NOT GO OUT (EVEN AFTER 3 SECONDS) 663
K-3 WHEN ENGINE IS STARTED IMMEDIATELY AFTER STARTING SWITCH IS TURNED ON (WITHIN 3 SECONDS), NO LAMPS ON MAINTENANCE MONITOR GO OUT 664
K-4 WHEN STARTING SWITCH IS TURNED ON (ENGINE STOPPED), CHECK ITEMS FLASH 665
a) ENGINE OIL LEVEL DISPLAY FLASHES 665
b) ENGINE WATER LEVEL DISPLAY FLASHES 666
K-5 WHEN STARTING SWITCH IS TURNED ON (ENGINE STARTED), CAUTION ITEMS FLASH 667
a) ENGINE OIL PRESSURE DISPLAY FLASHES 667
b) BATTERY CHARGE LEVEL DISPLAY FLASHES 668
c) BRAKE OIL PRESSURE DISPLAY FLASHES 669
d) AIR CLEANER (R H ) CLOGGING DISPLAY FLASHES 671
e) AIR CLEANER (L H ) CLOGGING DISPLAY FLASHES 672
f) TRANSMISSION OIL FILTER DISPLAY FLASHES 673
K-6 CAUTION ITEMS ARE FLASHING BUT BUZZER DOES NOT SOUND 674
K-7 THERE IS NO ABNORMALITY IN MONITOR DISPLAY BUT CAUTION BUZZER SOUNDS 675
K-8 CAUTION ITEMS ARE FLASHING BUT NEITHER CHECK LAMP NOR CAUTION LAMP FLASHES 676
a) CHECK LAMP 676
b) CAUTION LAMP 676
K-9 THERE IS NO ABNORMALITY IN MAINTENANCE MONITOR DISPLAY BUT CHECK LAMP OR CAUTION LAMP LIGHTS UP 677
a) CHECK LAMP 677
b) CAUTION LAMP 677
K-10 ONLY NIGHT LIGHTING OF MAINTENANCE MONITOR DOES NOT LIGHT UP WHEN LIGHTING SWITCH IS TURNED ON 678
K-11 NIGHT LIGHTING LIGHTS UP EVEN WHEN LIGHTING SWITCH IS TURNED OFF 679
K-12 SERVICE METER DOES NOT WORK 680
K-13 SERVICE METER IS RUNNING EVEN WHEN ENGINE IS STOPPED 680
K-14 ABNORMALITY IN GAUGE DISPLAY 681
a) ABNORMALITY IN FUEL GAUGE 681
b) ABNORMALITY IN ENGINE WATER TEMPERATURE GAUGE 682
c) ABNORMALITY IN TORQUE CONVERTER OIL TEMPERATURE GAUGE 683
TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE) 685
ELECTRICAL CIRCUIT DIAGRAM FOR POWER SUPPLY, ENGINE STARTING, ENGINE STOPPING AND PREHEATING 686
ELECTRICAL CIRCUIT DIAGRAM FOR PARKING BRAKE 688
ELECTRICAL CIRCUIT DIAGRAM FOR BOOM KICK-OUT AND BUCKET POSITIONER 689
E-1 ENGINE DOES NOT START 690
a) STARTING MOTOR DOES NOT TURN 690
b) STARTING MOTOR TURNS (STD SPEC ) 694
E-2 ENGINE DOES NOT STOP (STD SPEC ) 696
E-3 ENGINE STOPS WHEN MACHINE IS TRAVELING (STD SPEC ) 697
E-4 ABNORMALITY IN PREHEATING SYSTEM 699
a) DOES NOT CARRY OUT PREHEATING 699
b) ALWAYS CARRIES OUT PREHEATING FOR 45 SECONDS 700
c) PREHEATING STAYS ON 700
d) PREHEATING TIME BECOMES SHORTER, OR THERE IS FLUCTUATION 701
E-5 PARKING BRAKE DOES NOT HAVE EFFECT 703
a) PARKING BRAKE HAS NO EFFECT WHEN PARKING BRAKE SWITCH IS TURNED ON 703
b) PARKING BRAKE HAS NO EFFECT WHEN BRAKE PRESSURE (ACCUMULATOR PRESSURE) DROPS (DOES NOT WORK AS EMERGENCY BRAKE) 703
E-6 PARKING BRAKE IS APPLIED WHEN MACHINE IS TRAVELING 704
E-7 PARKING BRAKE IS RELEASED WHEN STARTING SWITCH IS TURNDED ON 706
E-8 TRANSMISSION DOES NOT CHANGE TO NEUTRAL WHEN PARKING BRAKE IS APPLIED (BUT PARKING BRAKE WORKS NORMALLY) 706
E-9 KICK-DOWN SWITCH DOES NOT WORK 708
a) KICK-DOWN SWITCH DOES NOT WORK EVEN THOUGH GEAR SHIFT WORKS NORMALLY 708
b) KICK-DOWN CANNOT BE CANCELED 709
E-10 BOOM KICK-OUT DOES NOT WORK 710
E-11 ABNORMALITY IN BUCKET POSITIONER FUNCTION 714
E-12 ABNORMALITY IN LIGHTING UP OF FRONT WORKING LAMP 717
E-13 ABNORMALITY IN LIGHTING UP OF REAR WORKING LAMP 717
E-14 ABNORMALITY IN TRANSMISSION CUT-OFF 717
E-15 ABNORMALITY IN LOW IDLING SELECTION 717
E-16 ABNORMALITY IN PARKING BRAKE DRAGGING WARNING 717
E-17 ABNORMALITY IN BUZZER 717
TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (H MODE) 719
H-1 MACHINE DOES NOT MOVE 720
H-2 MACHINE LACKS POWER OR SPEED (EVERY SPEED RANGE) 721
H-3 EXCESSIVE TIME LAG WHEN STARTING MACHINE OR SHIFTING GEAR 722
H-4 TORQUE CONVERTER OIL TEMPERATURE IS HIGH 723
H-5 STEERING DOES NOT TURN 724
STEERING WHEEL SPECIFICATION 724
H-6 STEERING DOES NOT TURN 725
STEERING WHEEL AND JOYSTICK STEERING SPECIFICATION 725
H-7 STEERING DOES NOT TURN 726
AJSS (ADVANCED JOYSTICK STEERING SYSTEM) SPECIFICATION 726
H-8 TURNING, RESPONSE OF STEERING IS POOR 727
STEERING WHEEL SPECIFICATION 727
H-9 TURNING, RESPONSE OF STEERING IS POOR 728
STEERING WHEEL AND JOYSTICK STEERING SPECIFICATION 728
H-10 TURNING, RESPONSE OF STEERING IS POOR 729
AJSS (ADVANCED JOYSTICK STEERING SYSTEM) SPECIFICATION 729
H-11 STEERING IS HEAVY 730
STEERING WHEEL SPECIFICATION 730
H-12 JOYSTICK LEVER IS HEAVY 730
STEERING WHEEL AND JOYSTICK STEERING SPECIFICATION 730
H-13 JOYSTICK LEVER IS HEAVY 731
AJSS (ADVANCED JOYSTICK STEERING SYSTEM) SPECIFICATION 731
H-14 STEERING WHEEL SHAKES OR JERKS 732
STEERING WHEEL SPECIFICATION 732
H-15 STEERING WHEEL SHAKES OR JERKS 733
STEERING WHEEL AND JOYSTICK STEERING SPECIFICATION 733
H-16 STEERING WHEEL SHAKES OR JERKS 734
AJSS (ADVANCED JOYSTICK STEERING SYSTEM) SPECIFICATION 734
H-17 MINIMUM TURNING RADII TO RIGHT AND LEFT ARE DIFFERENT 735
STEERING WHEEL SPECIFICATION, STEERING WHEEL AND JOYSTICK STEERING SPECIFICATION 735
H-18 MINIMUM TURNING RADII TO RIGHT AND LEFT ARE DIFFERENT 735
AJSS (ADVANCED JOYSTICK STEERING SYSTEM) SPECIFICATION 735
H-19 WHEEL BRAKES DO NOT WORK OR BRAKING EFFECT IS POOR 736
H-20 WHEEL BRAKES ARE NOT RELEASED OR BRAKES DRAG 737
H-21 BOOM DOES NOT RISE 738
H-22 BOOM MOVES SLOWLY OR DOES NOT HAVE SUFFICIENT LIFTING POWER 739
H-23 WHEN RAISING BOOM, BECOMES SLOW AT CERTAIN HEIGHT 740
H-24 BOOM CYLINDER CANNOT HOLD DOWN BUCKET 740
H-25 BOOM HAS LARGE AMOUNT OF HYDRAULIC DRIFT 740
H-26 BOOM FLUCTUATES WHILE WORKING 741
H-27 BOOM DROPS MOMENTARILY WHEN LEVER IS OPERATED FROM HOLD TO RAISE 741
H-28 BUCKET DOES NOT TILT BACK 742
H-29 BUCKET MOVES SLOWLY OR HAS INSUFFICIENT TILT BACK POWER 743
H-30 BUCKET MOVEMENT BECOMES SLOW DURING TILT BACK 744
H-31 BUCKET CYLINDER CANNOT HOLD DOWN BUCKET 744
H-32 BUCKET HAS LARGE AMOUNT OF HYDRAULIC DRIFT 744
H-33 BUCKET FLUCTUATES WHILE TRAVELING UNDER LOAD (WORK EQUIPMENT VALVE “HOLD”) 745
H-34 BUCKET DUMPS MOMENTARILY WHEN LEVER IS OPERATED FROM HOLD TO TILT 745
H-35 BOOM AND BUCKET LEVERS DO NOT MOVE SMOOTHLY 746
TROUBLESHOOTING OF JOYSTICK STEERING CONTROL SYSTEM (J MODE) 747
JUDGEMENT TABLE FOR JOYSTICK STEERING CONTROL SYSTEM RELATED PARTS 748
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE 750
ELECTRICAL CIRCUIT DIAGRAM FOR JOYSTICK STEERING CONTROL SYSTEM 754
J-1 FAILURE CODE [56] (SHORT CIRCUIT, DISCONNECTION IN CAUTION RELAY OUTPUT) IS DISPLAYED 756
J-2 FAILURE CODE [57] (SHORT CIRCUIT IN STEERING RIGHT SOLENOID (DETECTED WHEN SIGNAL IS OUTPUT)) IS DISPLAYED 757
J-3 FAILURE CODE [58] (SHORT CIRCUIT IN STEERING LEFT SOLENOID (DETECTED WHEN SIGNAL IS OUTPUT)) IS DISPLAYED 758
J-4 FAILURE CODE [59] (SHORT CIRCUIT IN STEERING RIGHT SOLENOID (POWER SUPPLY SIDE)) IS DISPLAYED 759
J-5 FAILURE CODE [60] (SHORT CIRCUIT IN STEERING LEFT SOLENOID (POWER SUPPLY SIDE)) IS DISPLAYED 760
J-6 FAILURE CODE [61] (SHORT CIRCUIT, DISCONNECTION IN STEERING SOLENOID CUT RELAY OUTPUT) IS DISPLAYED 761
J-7 FAILURE CODE [62] (SHORT CIRCUIT, DISCONNECTION IN JOYSTICK STEERING NEUTRAL CIRCUIT) IS DISPLAYED 762
J-8 FAILURE CODE [63] (SHORT CIRCUIT, DISCONNECTION IN JOYSTICK STEERING LEVER POTENTIOMETER) IS DISPLAYED 763
J-9 ABNORMALITY IN POWER SUPPLY, POWER SUPPLY VOLTAGE 764
J-10 ABNORMALITY IN JOYSTICK STEERING ON-OFF CIRCUIT 765
J-11 DISCONNECTION IN STEERING RIGHT SOLENOID 766
J-12 DISCONNECTION IN STEERING LEFT SOLENOID 767
TROUBLESHOOTING OF AJSS (ADVANCED JOYSTICK STEERING SYSTEM) CONTROL SYSTEM (A MODE) 769
JUDGEMENT TABLE FOR AJSS (ADVANCED JOYSTICK STEERING SYSTEM) CONTROL SYSTEM 770
OPERATIONS OF CONTROLLER AGAINST ABNORMALITY AND CONDITIONS OF MACHINE CAUSED BY ABNORMALITY 772
ELECTRIC CIRCUIT DIAGRAM RELATED TO AJSS (ADVANCED JOYSTICK STEERING SYSTEM) CONTROL 776
A-1 ERROR CODE [56] (DISCONNECTION OR SHORT CIRCUIT WITH CHASSIS GROUND IN CAUTION BUZZER RELAY SYSTEM) IS DISPLAYED 778
A-2 ERROR CODE [57] (DISCONNECTION OR SHORT CIRCUIT WITH CHASSIS GROUND IN STEERING LEVER ANGLE SENSOR SYSTEM) IS DISPLAYED 779
A-3 ERROR CODE [58] (DEVIATION OF STEERING LEVER ANGLE SENSOR AND FRAME ANGLE SENSOR SIGNALS) IS DISPLAYED 780
A-4 ERROR CODE [59] (DISCONNECTION OR SHORT CIRCUIT WITH CHASSIS GROUND IN FRAME ANGLE SENSOR SYSTEM) IS DISPLAYED 781
A-5 ERROR CODE [60] (DISCONNECTION OR SHORT CIRCUIT WITH CHASSIS GROUND IN STEERING LEVER LOCK PRESSURE SWITCH SYSTEM) IS DISPLAYED 782
A-6 ERROR CODE [62] (DISCONNECTION OR SHORT CIRCUIT WITH CHASSIS GROUND IN STEERING NEUTRAL INTERLOCK RELAY SYSTEM) IS DISPLAYED 783
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 784
A-8 STEERING SPEEDS IN BOTH DIRECTIONS ARE DIFFERENT 785
A-9 ABNORMALITY IN CONSOLE SWITCH (ADJUSTMENT OF STEERING LEVER ANGLE SENSOR AND FRAME ANGLE SENSOR IS IMPOSSIBLE) 786
A-10 ABNORMALITY IN POWER SOURCE AND VOLTAGE 787
30 DISASSEMBLY AND ASSEMBLY 789
HOW TO READ THIS MANUAL 791
STANDARD TIGHTENING TORQUE TABLE 793
PRECAUTIONS WHEN CARRYING OUT OPERATION 797
METHOD OF DISASSEMBLING AND CONNECTING PUSH-PULL TYPE COUPLER 800
COATING MATERIALS LIST 803
SPECIAL TOOL LIST 806
SKETCHES OF SPECIAL TOOLS 813
STARTING MOTOR 821
REMOVAL AND INSTALLATION 821
ALTERNATOR 822
REMOVAL AND INSTALLATION 822
ENGINE OIL COOLER 823
REMOVAL AND INSTALLATION 823
FUEL INJECTION PUMP FOR LEFT BANK 824
REMOVAL AND INSTALLATION (WITH GOVERNOR) 824
FUEL INJECTION PUMP FOR RIGHT BANK 825
REMOVAL AND INSTALLATION (WHTHOUT GOVERNOR) 825
WATER PUMP 826
REMOVAL AND INSTALLATION 826
NOZZLE HOLDER 827
REMOVAL AND INSTALLATION 827
TURBOCHARGER 828
REMOVAL AND INSTALLATION 828
ENGINE FRONT SEAL 829
REMOVAL AND INSTALLATION 829
ENGINE REAR SEAL 831
REMOVAL AND INSTALLATION 831
CYLINDER HEAD 833
REMOVAL 833
INSTALLATION 837
RADIATOR 840
REMOVAL 840
INSTALLATION 843
ENGINE 844
REMOVAL 844
INSTALLATION 850
DAMPER 851
REMOVAL AND INSTALLATION 851
DISASSEMBLY 852
ASSEMBLY 854
TORQUE CONVERTER AND TRANSMISSION ASSEMBLY 858
REMOVAL 858
INSTALLATION 865
TORQUE CONVERTER 867
DISASSEMBLY 867
ASSEMBLY 871
TORQUE CONVERTER VALVE 876
DISASSEMBLY AND ASSEMBLY 876
TRANSMISSION 877
DISASSEMBLY 877
ASSEMBLY 894
TRANSMISSION VALVE 912
REMOVAL AND INSTALLATION 912
DISASSEMBLY AND ASSEMBLY 913
TRANSFER 917
DISASSEMBLY 917
ASSEMBLY 925
PTO 937
DISASSEMBLY 937
ASSEMBLY 939
CENTER SUPPORT 942
REMOVAL 942
INSTALLATION 943
DISASSEMBLY 944
ASSEMBLY 946
DRIVE SHAFT 949
DISASSEMBLY 949
ASSEMBLY 951
FRONT AXLE 953
REMOVAL 953
INSTALLATION 955
REAR AXLE 956
REMOVAL 956
INSTALLATION 962
DIFFERENTIAL 963
REMOVAL 963
INSTALLATION 965
DISASSEMBLY 966
ASSEMBLY 970
FINAL DRIVE 976
DISASSEMBLY 976
ASSEMBLY 979
ORBIT-ROLL 984
REMOVAL 984
INSTALLATION 985
EMERGENCY STEERING PUMP 986
REMOVAL AND INSTALLATION 986
DIVERTER VALVE 987
REMOVAL AND INSTALLATION 987
DISASSEMBLY 988
ASSEMBLY 989
ACCUMULATOR CHARGE VALVE 991
REMOVAL AND INSTALLATION 991
DISASSEMBLY 992
ASSEMBLY 993
STEERING STOP VALVE 995
REMOVAL AND INSTALLATION 995
STEERING CYLINDER 996
REMOVAL 996
INSTALLATION 997
STEERING VALVE 1004
REMOVAL 1004
INSTALLATION 1005
BRAKE VALVE 1006
REMOVAL AND INSTALLATION 1006
SLACK ADJUSTER 1007
REMOVAL AND INSTALLATION 1007
DISASSEMBLY 1008
ASSEMBLY 1009
BRAKE 1010
REMOVAL AND INSTALLATION 1010
DISASSEMBLY 1011
ASSEMBLY 1014
PARKING BRAKE CALIPERS 1018
REMOVAL AND INSTALLATION 1018
DISASSEMBLY 1019
ASSEMBLY 1021
PARKING BRAKE PAD 1023
REMOVAL AND INSTALLATION 1023
PARKING BRAKE SPRING CYLINDER 1024
REMOVAL AND INSTALLATION 1024
BRAKE OIL TANK 1025
REMOVAL AND INSTALLATION 1025
HYDRAULIC PUMP 1026
REMOVAL 1026
INSTALLATION 1029
SERVO CYLINDER 1031
REMOVAL AND INSTALLATION 1031
HYDRAULIC TANK AND FILTER CASE ASSEMBLY 1032
REMOVAL 1032
INSTALLATION 1033
PPC VALVE 1034
REMOVAL 1034
INSTALLATION 1035
DISASSEMBLY AND ASSEMBLY 1036
WORK EQUIPMENT CONTROL VALVE 1037
REMOVAL 1037
INSTALLATION 1038
DISASSEMBLY 1039
ASSEMBLY 1041
CAB 1043
REMOVAL 1043
INSTALLATION 1045
FLOOR FRAME 1046
REMOVAL 1046
INSTALLATION 1048
CENTER HINGE PIN 1049
REMOVAL 1049
INSTALLATION 1055
WORK EQUIPMENT 1061
REMOVAL 1061
INSTALLATION 1066
BOOM FRONT END BUSH 1067
REPLACEMENT 1067
BUCKET CYLINDER 1068
REMOVAL AND INSTALLATION 1068
LIFT CYLINDER 1069
REMOVAL 1069
INSTALLATION 1070
HYDRAULIC CYLINDER 1071
DISASSEMBLY 1071
ASSEMBLY 1073
AIR CONDITIONER UNIT 1075
REMOVAL 1075
INSTALLATION 1076
AIR CONDITIONER COMPRESSOR 1077
REMOVAL AND INSTALLATION 1077
RECEIVER TANK 1078
REMOVAL AND INSTALLATION 1078
AIR CONDITIONER CONDENSER 1079
REMOVAL AND INSTALLATION 1079
TRANSMISSION AND STEERING CONTROLLER 1080
REMOVAL AND INSTALLATION 1080
MAIN MONITOR 1081
REMOVAL 1081
INSTALLATION 1082
FUEL TANK 1083
REMOVAL 1083
INSTALLATION 1084
COUNTERWEIGHT 1085
REMOVAL AND INSTALLATION 1085
AJSS LEVER SWITCH ASSEMBLY 1086
REMOVAL 1086
INSTALLATION 1089
40 MAINTENANCE STANDARD 1095
ENGINE MOUNT 1096
TRANSMISSION MOUNT 1097
DAMPER 1098
TORQUE CONVERTER CHARGING, PPC AND BRAKE PUMP 1100
TORQUE CONVERTER 1102
TORQUE CONVERTER REGULATOR VALVE 1103
TRANSMISSION 1104
TRANSFER 1107
TRANSMISSION CONTROL VALVE 1110
DRIVE SHAFT 1115
CENTER SUPPORT 1116
DIFFERENTIAL 1117
FINAL DRIVE 1120
AXLE MOUNT 1122
CENTER HINGE PIN 1124
STEERING COLUMN 1126
STEERING DEMAND VALVE 1128
DIVERTER VALVE 1130
STEERING CYLINDER MOUNT 1131
EMERGENCY STEERING PUMP 1132
BRAKE VALVE 1134
SLACK ADJUSTER 1138
BRAKE 1140
PARKING BRAKE 1142
PPC VALVE 1144
PPC RELIEF VALVE 1146
STEERING PUMP 1147
SWITCH PUMP 1149
MAIN PISTON PUMP 1151
CONTROL PUMP (BAR025) 1153
COOLING FAN MOTOR 1155
MAIN CONTROL VALVE 1156
HYDRAULIC CYLINDER 1160
BUCKET LINKAGE 1162
BUCKET POSITIONER AND BOOM KICK-OUT 1164
BRAKE COOLING PUMP 1165
90 OTHERS 1167
ELECTRIC CIRCUIT DIAGRAM [1/22] 1169
ELECTRIC CIRCUIT DIAGRAM [2/22] 1171
ELECTRIC CIRCUIT DIAGRAM [3/22] 1173
ELECTRIC CIRCUIT DIAGRAM [4/22] 1175
ELECTRIC CIRCUIT DIAGRAM [5/22] 1177
ELECTRIC CIRCUIT DIAGRAM [6/22] 1179
ELECTRIC CIRCUIT DIAGRAM [7/22] 1181
ELECTRIC CIRCUIT DIAGRAM [8/22] 1183
ELECTRIC CIRCUIT DIAGRAM [9/22] 1185
ELECTRIC CIRCUIT DIAGRAM [10/22] 1187
ELECTRIC CIRCUIT DIAGRAM [11/22] 1189
ELECTRIC CIRCUIT DIAGRAM [12/22] 1191
ELECTRIC CIRCUIT DIAGRAM [13/22] 1193
ELECTRIC CIRCUIT DIAGRAM [14/22] 1195
ELECTRIC CIRCUIT DIAGRAM [15/22] 1197
ELECTRIC CIRCUIT DIAGRAM [16/22] 1199
ELECTRIC CIRCUIT DIAGRAM [17/22] 1201
ELECTRIC CIRCUIT DIAGRAM [18/22] 1203
ELECTRIC CIRCUIT DIAGRAM [19/22] 1205
ELECTRIC CIRCUIT DIAGRAM [20/22] 1207
ELECTRIC CIRCUIT DIAGRAM [21/22] 1209
ELECTRIC CIRCUIT DIAGRAM [22/22] 1211
ELECTRIC CIRCUIT DIAGRAM (AUTO-GREASING SPECIFICATION) 1213
WITH ELECTRONIC GOVERNOR 1215
TROUBLESHOOTING OF ELECTRONIC GOVERNOR SYSTEM (G MODE) 1217
JUDGEMENT TABLE FOR ENGINE CONTROLLER AND ENGINE RELATED PARTS 1218
ACTION TAKEN BY CONTROLLER AND CONDITION OF MACHINE WHEN ABNORMALITY OCCURS 1220
ACTION TAKEN BY CONTROLLER AND CONDITIONS FOR RESETTING WHEN ABNORMALITY OCCURS 1228
POINTS TO REMEMBER WHEN CARRYING OUT TROUBLESHOOTING OF ENGINE CONTROLLER SYSTEM 1229
JUDGEMENT TABLE FOR ENGINE CONTROLLER 1231
G-1 [90] [OFF OR 10] ABNORMALITY IN POWER SOURCE SYSTEM 1232
G-2 [90] [11] ABNORMALITY IN CONTROLLER SYSTEM 1232
G-3 [90] [21] MISTAKEN CONNECTION OF CONNECTOR 1233
G-4 [90] [56] ABNORMALITY IN RIGHT BANK SOLENOID POWER SOURCE SYSTEM 1233
G-5 [90] [57] ABNORMALITY IN LEFT BANK SOLENOID POWER SOURCE SYSTEM 1233
G-6 [90] [58] ABNORMALITY IN BACK-UP POWER SOURCE SYSTEM 1234
G-7 [90] [59] ABNORMALITY IN SWITCH POWER SOURCE SYSTEM 1235
G-8 [91] [14] ABNORMALITY IN RIGHT BANK GOVERNOR SOLENOID SYSTEM 1236
G-9 [91] [15] ABNORMALITY IN LEFT BANK GOVERNOR SOLENOID SYSTEM 1237
G-10 [91] [16] ABNORMALITY IN RIGHT BANK GOVERNOR CUT RELAY SYSTEM 1238
G-11 [91] [17] ABNORMALITY IN LEFT BANK GOVERNOR CUT RELAY SYSTEM 1239
G-12 [91] [19] ABNORMALITY IN RIGHT BANK GOVERNOR SERVO SYSTEM 1240
G-13 [91] [1A] ABNORMALITY IN LEFT BANK GOVERNOR SERVO SYSTEM 1241
G-14 [91] [1d] ABNORMALITY IN RIGHT BANK PRE-STROKE SOLENOID SYSTEM 1242
G-15 [91] [1E] ABNORMALITY IN LEFT BANK PRE-STROKE SOLENOID SYSTEM 1243
G-16 [92] [12] ABNORMALITY IN RIGHT BANK RACK SENSOR SYSTEM 1244
G-17 [92] [13] ABNORMALITY IN LEFT BANK RACK SENSOR SYSTEM 1245
G-18 [92] [18] ABNORMALITY IN RACK SENSOR POWER SOURCE SYSTEM 1246
G-19 [93] [1b] ABNORMALITY IN ENGINE SPEED SENSOR A SYSTEM 1247
G-20 [94] [1c] ABNORMALITY IN ENGINE SPEED SENSOR B SYSTEM 1248
G-21 [93, 94] [1b, 1c] ABNORMALITY IN ENGINE SPEED SENSOR A, B SYSTEM 1249
G-22 [95] [40] ABNORMALITY IN ENGINE WATER TEMPERATURE SENSOR SYSTEM 1249
G-23 [97] [31] ABNORMALITY IN ACCELERATOR SENSOR SYSTEM 1250
G-24 [98] [18] ABNORMALITY IN MODEL SELECTION 1252
G-25 [99] [22] ENGINE OVERRUN 1253
G-26 ENGINE DOES NOT START 1253
G-27 ENGINE DOES NOT STOP 1257

DESCRIPTION:

Komatsu WA900-3 Avance Loader Shop Manual SEBM013522 – 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:

PRECAUTIONS DURING WORK :

S.V 26/12/24