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Komatsu WD900-3 Wheel Dozer Shop Manual 50001 and up – PDF DOWNLOAD
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Komatsu WD900-3 Wheel Dozer Shop Manual
Book Code: SEBM036903
MACHINE MODEL SERIAL NUMBER
WD900-3 50001 and up
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Description
Komatsu WD900-3 Wheel Dozer Shop Manual
FILE DETAILS:
Komatsu WD900-3 Wheel Dozer Shop Manual
Brands: Komatsu
Equipment Type: Wheel Dozer
Manuals Type: Shop Manual
Machine Model: WD900-3
Serial Number: 50001 and up
Book Code: SEBM036903
Language: English
Pages: 842
File Format: Portable Document Format (PDF)
TABLE OF CONTENTS:
Komatsu WD900-3 Wheel Dozer Shop Manual
COVER....................................................................................................................................................................................... 1 CONTENTS.................................................................................................................................................................................... 2 01 GENERAL.................................................................................................................................................................................. 9 GENERAL ASSEMBLY DRAWING................................................................................................................................................................ 10 SPECIFICATIONS.......................................................................................................................................................................... 11 WEIGHT TABLE ........................................................................................................................................................................... 14 LIST OF LUBRICANT AND WATER............................................................................................................................................................. 16 10 STRUCTURE AND FUNCTION .................................................................................................................................................................. 18 POWER TRAIN............................................................................................................................................................................. 19 POWER TRAIN SYSTEM...................................................................................................................................................................... 20 ENGINE CONTROL.......................................................................................................................................................................... 21 SERVO CYLINDER.......................................................................................................................................................................... 22 RADIATOR AND COOLER..................................................................................................................................................................... 26 DAMPER.................................................................................................................................................................................. 27 TORQUE CONVERTER AND TRANSMISSION PIPING................................................................................................................................................ 28 TRANSMISSION HYDRAULIC SYSTEM DIAGRAM................................................................................................................................................... 29 TRANSMISSION HYDRAULIC CIRCUIT DIAGRAM.................................................................................................................................................. 30 TORQUE CONVERTER........................................................................................................................................................................ 31 TRANSMISSION............................................................................................................................................................................ 36 TRANSFER................................................................................................................................................................................ 46 TRANSMISSION CONTROL VALVE.............................................................................................................................................................. 47 TORQUE CONVERTER OIL COOLER............................................................................................................................................................. 63 DRIVE SHAFT............................................................................................................................................................................. 64 CENTER SUPPORT.......................................................................................................................................................................... 65 AXLE.................................................................................................................................................................................... 66 FINAL DRIVE............................................................................................................................................................................. 71 CENTER HINGE PIN........................................................................................................................................................................ 72 AXLE MOUNT.............................................................................................................................................................................. 73 TIRE AND WHEEL ......................................................................................................................................................................... 75 STEERING PIPING DIAGRAM................................................................................................................................................................. 76 STEERING COLUMN......................................................................................................................................................................... 78 STEERING PUMP........................................................................................................................................................................... 79 SWITCH PUMP............................................................................................................................................................................. 83 STEERING DEMAND VALVE................................................................................................................................................................... 86 STEERING UNIT (ORBIT-ROLL VALVE)........................................................................................................................................................ 97 PROPORTIONAL SOLENOID VALVE.............................................................................................................................................................100 TOW-WAY RESTRICTOR VALVE................................................................................................................................................................101 DIVERTER VALVE..........................................................................................................................................................................102 BRAKE PIPING............................................................................................................................................................................106 BRAKE CIRCUIT DIAGRAM...................................................................................................................................................................107 BRAKE VALVE.............................................................................................................................................................................111 CHARGE VALVE............................................................................................................................................................................121 ACCUMULATOR (FOR BRAKE).................................................................................................................................................................125 SLACK ADJUSTER..........................................................................................................................................................................126 BRAKE...................................................................................................................................................................................129 PARKING BRAKE...........................................................................................................................................................................130 SPRING CYLINDER.........................................................................................................................................................................133 PARKING BRAKE SOLENOID VALVE............................................................................................................................................................134 HYDRAULIC PIPING .......................................................................................................................................................................135 WORK EQUIPMENT SOLENOID VALVE...........................................................................................................................................................137 WORK EQUIPMENT LEVER LINKAGE............................................................................................................................................................147 HYDRAULIC TANK..........................................................................................................................................................................148 MAIN PISTON PUMP........................................................................................................................................................................151 ES VALVE(ENGINE SENSING VALVE)..........................................................................................................................................................162 SERVO VALVE.............................................................................................................................................................................164 PPC VALVE(PROPORTIONAL PRESSURE VALVE)..................................................................................................................................................167 PPC RELIEF VALVE........................................................................................................................................................................171 ACCUMULATOR (FOR PPC VALVE).............................................................................................................................................................172 MAIN CONTROL VALVE......................................................................................................................................................................173 LUBRICATION OF WORK EQUIPMENT...........................................................................................................................................................181 WORK EQUIPMENT LINKAGE..................................................................................................................................................................183 CAB.....................................................................................................................................................................................185 ROPS CANOPY.............................................................................................................................................................................186 AIR CONDITIONER.........................................................................................................................................................................187 MACHINE MONITOR SYSTEM..................................................................................................................................................................190 MAIN MONITOR............................................................................................................................................................................191 MAINTENANCE MONITOR.....................................................................................................................................................................195 ENGINE STARTING CIRCUIT.................................................................................................................................................................198 ENGINE STOP CIRCUIT.....................................................................................................................................................................199 ELECTRICAL TRANSMISSION CONTROL.........................................................................................................................................................200 BLADE CONTROL SWITCH(KICK-DOWN,HOLD SWITCH).............................................................................................................................................203 JOYSTICK STEERING SYSTEM................................................................................................................................................................204 TRANSMISSION AND JOYSTICK STEERING CONTROLLER...........................................................................................................................................206 ELECTRIC PARKING BRAKE CONTROL..........................................................................................................................................................208 BRAKE COOLING SYSTEM....................................................................................................................................................................217 55℃ SPECIFICATION.......................................................................................................................................................................226 20 TESTING AND ADJUSTING....................................................................................................................................................................229 STANDARD VALUE TABLE FOR ENGINE.........................................................................................................................................................230 STANDARD VALUE TABLE FOR CHASSIS........................................................................................................................................................231 STANDARD VALUE TABLE FOR ELECTRICAL PARTS...............................................................................................................................................236 TESTING AND ADJUSTING...................................................................................................................................................................246 TABLE OF TOOLS FOR TESTING, ADJUSTING, AND TROUBLESHOOTING..........................................................................................................................247 MEASURING ENGINE SPEED..............................................................................................................................................................248 MEASURING EXHAUST GAS COLOR.........................................................................................................................................................249 ADJUSTING VALVE CLEARANCE...........................................................................................................................................................250 MEASURING COMPRESSION PRESSURE......................................................................................................................................................251 MEASURING BLOW-BY PRESSURE..........................................................................................................................................................252 TESTING AND ADJUSTING FUEL INJECTION TIMING.........................................................................................................................................253 MEASURING ENGINE OIL PRESSURE.......................................................................................................................................................254 MEASURING EXHAUST TEMPERATURE.......................................................................................................................................................255 MEASURING AIR SUPPLY PRESSURE (BOOST PRESSURE)......................................................................................................................................256 TESTING AND ADJUSTING ALTERNATOR BELT TENSION.......................................................................................................................................257 TESTING AND ADJUSTING BELT TENSION FOR AIR CONDITIONER COMPRESSOR...................................................................................................................258 MEASURING ACCELERATOR PEDAL OPERATING EFFORT........................................................................................................................................259 MEASURING ACCELERATOR PEDAL OPERATING ANGLE.........................................................................................................................................260 ADJUSTING FUEL CONTROL CABLE,LINKAGE,AND SERVO CYLINDER.............................................................................................................................261 ADJUSTING ENGINE STOPPING MOTOR CABLE...............................................................................................................................................263 TESTING AND ADJUSTING TORQUE CONVERTER AND TRANSMISSION OIL PRESSURE................................................................................................................264 PROCEDURE FOR OPERATING EMERGENCY STEERING SPOOL WHEN TRANSMISSION VALVE FAILS......................................................................................................266 TESTING AND ADJUSTING STEERING OIL PRESSURE.........................................................................................................................................268 TESTING AND ADJUSTING EMERGENCY STEERING OIL PRESSURE...............................................................................................................................269 BLEEDING AIR FROM STEERING CIRCUIT .................................................................................................................................................270 TESTING AND ADJUSTING STEERING STOP VALVE...........................................................................................................................................271 TESTING WHEEL BRAKE PERFORMANCE ....................................................................................................................................................272 TESTING WHEEL BRAKE OIL PRESSURE DROP...............................................................................................................................................273 MEASURING WEAR OF WHEEL BRAKE DISC..................................................................................................................................................275 TESTING AND ADJUSTING ACCUMULATOR CHARGE CUT-IN AND CUT-OUT PRESSURE................................................................................................................276 BLEEDING AIR FROM WHEEL BRAKE CIRCUIT ..............................................................................................................................................278 TESTING PARKING BRAKE PERFORMANCE...................................................................................................................................................279 MEASURING PARKING BRAKE SOLENOID OUTPUT PRESSURE....................................................................................................................................280 CHECKING AND ADJUSTING PARKING BRAKE PAD............................................................................................................................................281 TESTING AND ADJUSTING PPC PRESSURE .................................................................................................................................................282 ADJUSTING PPC VALVE LINKAGE.........................................................................................................................................................283 TESTING AND ADJUSTING WORK EQUIPMENT HYDRAULIC PRESSURE.............................................................................................................................284 BLEEDING AIR FROM PISTON PUMP ......................................................................................................................................................286 BLEEDING AIR FROM WORK EQUIPMENT CIRCUIT............................................................................................................................................287 ADJUSTING WORK EQUIPMENT LEVER LINKAGE .............................................................................................................................................288 RELEASING REMAINING PRESSURE IN HYDRAULIC CIRCUIT ..................................................................................................................................289 ADJUSTING SPEEDOMETER MODULE OF MAIN MONITOR .......................................................................................................................................290 ADJUSTING JOYSTICK LEVER POTENTIOMETER..............................................................................................................................................291 ADJUSTING JOYSTICK LEVER NEUTRAL DETECTION SWITCH...................................................................................................................................292 TROUBLESHOOTING.........................................................................................................................................................................293 POINTS TO REMEMBER WHEN TROUBLESHOOTING ............................................................................................................................................294 SEQUENCE OF EVENTS IN TROUBLESHOOTING ..............................................................................................................................................295 POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE ...................................................................................................................................296 CHECKS BEFORE TROUBLESHOOTING ......................................................................................................................................................304 CONNECTOR TYPES AND MOUNTING LOCATIONS..............................................................................................................................................305 CONNECTOR LOCATION STEREOGRAM.......................................................................................................................................................310 CONNECTION TABLE FOR CONNECTOR PIN NUMBERS .........................................................................................................................................316 T-BRANCH BOX AND T-BRANCH TABLE.....................................................................................................................................................341 EXPLANATION OF FUNCTIONS OF ELECTRIC CONTROL MECHANISM..............................................................................................................................343 METHOD OF DISPLAYING ACTION CODE AND FAILURE CODE...................................................................................................................................347 CHART OF ACTION CODES AND FAILURE CODES,AND RE-ENACTION ............................................................................................................................349 TRANSMISSION CONTROLLER LED DISPLAY.................................................................................................................................................352 METHOD OF USING JUDGEMENT TABLE.....................................................................................................................................................353 METHOD OF USING TROUBLESHOOTING CHARTS..............................................................................................................................................354 METHOD OF USING MATRIX TROUBLESHOOTING TABLES.......................................................................................................................................356 TROUBLESHOOTING OF ENGINE SYSTEM (S MODE)...........................................................................................................................................358 METHOD OF USING TROUBLESHOOTING CHARTS..........................................................................................................................................359 S-1 STARTING PERFORMANCE IS POOR (STARTING ALWAYS TAKES TIME)...................................................................................................................363 S-2 ENGINE DOES NOT START.......................................................................................................................................................364 (1) ENGINE DOES NOT TURN....................................................................................................................................................364 (2) ENGINE TURNS BUT NO EXHAUST GAS COMES OUT (FUEL IS NOT BEING INJECTED)(INCLUDING CASES WITH V-TYPE ENGINE WHERE THERE IS NO FULE INJECTION FOR THE BANK ON THE SIDE)....365 (3) EXHAUST GAS COMES OUT BUT ENGINE DOES NOT START (FUEL IS BEING INJECTED)................................................................................................366 S-3 ENGINE DOES NOT PICK UP SMOOTHLY (FOLLOW-UP IS POOR)........................................................................................................................367 S-4 ENGINE STOPS DURING OPERATIONS(FOR V TYPE ENGINE,INCLUDING CASES WHERE ONE BANK STOPS)......................................................................................368 S-5 ENGINE DOES NOT ROTATE SMOOTHLY (HUNTING)...................................................................................................................................369 S-6 ENGINE LACKS OUTPUT (NO POWER)(WITH V-TYPE ENGINE,FOR CASES WHERE THERE IS INJECTION FOR ONLY ONE BANK,GO TO TROUBLESHOOTING S-2-(2) OR S-4)................................370 S-7 EXHAUST GAS IS BLACK (INCOMPLETE COMBUSTION)................................................................................................................................371 S-8 OIL CONSUMPTION IS EXCESSIVE (OR EXHAUST GAS IS BLUE).......................................................................................................................372 S-9 OIL BECOMES CONTAMINATED QUICKLY............................................................................................................................................373 S-10 FUEL CONSUMPTION IS EXCESSIVE..............................................................................................................................................374 S-11 OIL IS IN COOLING WATER,OR WATER SPURTS BACK,OR WATER LEVEL GOES DOWN......................................................................................................375 S-12 OIL PRESSURE LAMP LIGHTS UP (DROP IN OIL PRESSURE).........................................................................................................................376 S-13 OIL LEVEL RISES ...........................................................................................................................................................377 S-14 WATER TEMPERATURE BECOMES TOO HIGH (OVERHEATING)...........................................................................................................................378 S-15 ABNORMAL NOISE IS MADE.....................................................................................................................................................379 S-16 VIBRATION IS EXCESSIVE.....................................................................................................................................................380 TROUBLESHOOTING OF TRANSMISSION CONTROL SYSTEM (T MODE).............................................................................................................................381 JUDGEMENT TABLE FOR TRANSMISSION CONTROL SYSTEM RELATED PARTS ..................................................................................................................382 ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE .....................................................................................................383 ELECTRICAL CIRCUIT DIAGRAM FOR TRANSMISSION CONTROL SYSTEM......................................................................................................................387 T-1 FAILURE CODE [10] (SHORT CIRCUIT,DISCONNECTION,SHORT CIRCUIT WITH POWER SOURCE IN BACKUP LAMP RELAY) IS DISPLAYED...........................................................389 T-2 FAILURE CODE [12] (SHORT CIRCUIT,DISCONNECTION,SHORT CIRCUIT WITH POWER SOURCE IN F SOLENOID) IS DISPLAYED..................................................................390 T-3 FAILURE CODE [13] (SHORT CIRCUIT,DISCONNECTION,SHORT CIRCUIT WITH POWER SOURCE IN R SOLENOID) IS DISPLAYED..................................................................391 T-4 FAILURE CODE [14] (SHORT CIRCUIT,DISCONNECTION,SHORT CIRCUIT WITH POWER SOURCE IN 1ST SOLENOID) IS DISPLAYED................................................................392 T-5 FAILURE CODE [15] (SHORT CIRCUIT,DISCONNECTION,SHORT CIRCUIT WITH POWER SOURCE IN 2ND SOLENOID) IS DISPLAYED................................................................393 T-6 FAILURE CODE [16] (SHORT CIRCUIT,DISCONNECTION,SHORT CIRCUIT WITH POWER SOURCE IN 3RD SOLENOID) IS DISPLAYED................................................................394 T-7 FAILURE CODE [19] (SHORT CIRCUIT,DISCONNECTION IN JOYSTICK DIRECTIONAL SWITCH SYSTEM) IS DISPLAYED..........................................................................395 T-8 FAILURE CODE [20] (SHORT CIRCUIT,DISCONNECTION IN DIRECTIONAL SWITCH SYSTEM) IS DISPLAYED...................................................................................396 T-9 FAILURE CODE [21] (SHORT CIRCUIT,DISCONNECTION IN RANGE SWITCH SYSTEM) IS DISPLAYED.........................................................................................399 T-10 FAILURE CODE [22] (DISCONNECTION IN TRAVEL SPEED SENSOR SYSTEM) IS DISPLAYED...............................................................................................402 T-11 FAILURE CODE [23] (SHORT CIRCUIT,DISCONNECTION IN ENGINE SPEED SENSOR SYSTEM) IS DISPLAYED.................................................................................403 T-12 SHIFT-UP SIGNAL SYSTEM(JOYSTICK(IF EQUIPPED)MANUAL SHIFT)AND HOLD SIGNAL SYSTEM(AUTO-SHIFT(IF EQUIPPED)....................................................................404 T-13 KICK-DOWN SIGNAL SYSTEM AND SHIFT-DOWN SIGNAL SYSTEM(JOYSTICK(IF EQUIPPED)MANUAL SHIFT)....................................................................................404 T-14 TRANSMISSION CUT-OFF SIGNAL SYSTEM.........................................................................................................................................405 T-15 NEUTRALIZER SIGNAL SYSTEM..................................................................................................................................................406 T-16 BUZZER SIGNAL SYSTEM.......................................................................................................................................................407 T-17 NOTWORK SYSTEM.............................................................................................................................................................408 T-18 TRANSMISSION CONTROLLER POWER SOURCE SYSTEM................................................................................................................................409 T-19 SHORT CIRCUIT IN TRAVEL SPEED SENSOR SYSTEM................................................................................................................................410 T-2O ABNORMALITY IN MACHINE SELECTION WIRING HARNESS............................................................................................................................411 TROUBLESHOOTING OF MAIN MONITOR SYSTEM (M MODE).....................................................................................................................................412 TROUBLE DATA DISPLAY............................................................................................................................................................414 ELECTRICAL CIRCUIT DIAGRAM FOR MAIN MONITOR SYSTEM..............................................................................................................................416 M-1 MAIN MONITOR DOES NOT WORK..................................................................................................................................................418 M-2 WHEN STARTING SWITCH IS TURNED ON (WITHIN 3 SECONDS) AND ENGINE IS STARTED IMMEDIATELY,ALL LAMPS STAY LIGHTED UP............................................................419 M-3 SPEEDOMETER DISPLAY DOES NOT WORK PROPERLY..................................................................................................................................420 M-4 ABNORMALITY IN SHIFT INDICATOR .............................................................................................................................................421 a) DISPLAYS N EVEN WHEN DIRECTIONAL SWITCH IS AT F..........................................................................................................................421 b) DISPLAYS N EVEN WHEN DIRECTIONAL SWITCH IS AT R..........................................................................................................................421 c) DOES NOT DISPLAY N EVEN WHEN DIRECTIONAL SWITCH IS AT N (DISPLAYS 1ST-3RD)...............................................................................................422 d) DOES NOT DISPLAY 1ST EVEN WHEN GEAR SHIFT LEVER IS AT 1ST POSITION(DIRECTIONAL LEVER IS AT F OR R POSITION)..............................................................422 e) DOES NOT DISPLAY 2ND EVEN WHEN GEAR SHIFT LEVER IS AT 2ND POSITION(DIRECTIONAL LEVER IS AT F OR R POSITION)..............................................................422 f) DOES NOT DISPLAY 3RD EVEN WHEN GEAR SHIFT LEVER IS AT 3RD POSITION(DIRECTIONAL LEVER IS AT F OR R POSITION)..............................................................423 M-5 HIGH BEAM DISPLAY DOES NOT LIGHT UP.........................................................................................................................................424 M-6 TURN SIGNAL DISPLAY DOES NOT LIGHT UP.......................................................................................................................................425 a) L.H. TURN SIGNAL DISPLAY DOES NOT LIGHT UP...............................................................................................................................425 b) R.H. TURN SIGNAL DISPLAY DOES NOT LIGHT UP...............................................................................................................................425 M-7 ABNORMALITY IN PARKING DISPLAY..............................................................................................................................................426 a) PARKING LAMP DISPLAY DOES NOT LIGHT UP...................................................................................................................................426 b) PARKING LAMP DISPLAY STAYS LIGHTED UP....................................................................................................................................426 M-8 ABNORMALITY IN PREHEATING SYSTEM............................................................................................................................................427 a) DOES NOT CARRY OUT PREHEATING............................................................................................................................................427 b) ALWAYS CARRIES OUT PREHEATING FOR 45 SECONDS.............................................................................................................................428 c) PREHEATING STAYS ON......................................................................................................................................................428 d) PREHEATING TIME BECOMES SHORTER,OR THERE IS VARIATION....................................................................................................................429 M-9 NIGHT LIGHTING DOES NOT LIGHT UP............................................................................................................................................431 M-10 ABNORMALITY IN FRONT WORKING LAMP..........................................................................................................................................432 a) NEITHER MONITOR DISPLAY NOR FRONT WORKING LAMP LIGHT UP..................................................................................................................432 b) WORKING LAMP LIGHTS UP BUT MONITOR DISPLAY DOES NOT LIGHT UP.............................................................................................................432 c) MONITOR DISPLAY LIGHTS UP BUT FRONT WORKING LAMP DOES NOT LIGHT UP.......................................................................................................432 M-11 ABNORMALITY IN REAR WORKING LAMP...........................................................................................................................................434 a) NEITHER MONITOR DISPLAY NOR REAR WORKING LAMP LIGHT UP...................................................................................................................434 b) REAR WORKING LAMP LIGHTS UP BUT MONITOR DISPLAY DOES NOT LIGHT UP........................................................................................................434 c) MONITOR DISPLAY LIGHTS UP BUT REAR WORKING LAMP DOES NOT LIGHT UP........................................................................................................434 M-12 ABNORMALITY IN TRANSMISSION CUT-OFF........................................................................................................................................436 a) WHEN MONITOR SWITCH (TRANSMISSION CUT-OFF SWITCH ) IS PRESSED,CUT-OFF FUNCTION IS NOT SWITCHED AND DISPLAY DOES NOT CHANGE...............................................436 b) WHEN MONITOR SWITCH (TRANSMISSION CUT-OFF SWITCH )IS OFF,MONITOR DISPLAY GOES OUT BUT CUT-OFF FUNCTION IS ACTUATED WHEN PEDAL IS DEPRESSED...............................436 c) WHEN MONITOR DISPLAY IS TURNED OFF (TRANSMISSION CUT-OFF SWITCH TURNED OFF),CUT-OFF FUNCTION IS ALWAYS ACTUATED..........................................................436 d) CUT-OFF FUNCTION IS ALWAYS ACTUATED REGARDLESS OF MONITOR DISPLAY (TRANSMISSION CUT-OFF SWITCH ON OR OFF)................................................................436 e) MONITOR DISPLAY LIGHTS UP (TRANSMISSION CUT-OFF SWITCH TURNED ON),BUT CUT-OFF FUNCTION IS NOT ACTUATED...................................................................437 M-13 ABNORMALITY IN LOW IDLING SELECTION........................................................................................................................................438 a) WHEN MONITOR SWITCH (LOW IDLE SELECTOR SWITCH) IS TURNED ON,THE LOW IDLING SPEED DOES NOT RISE AND DISPLAY DOES NOT CHANGE...............................................438 b) WHEN THE MONITOR SWITCH (LOW IDLE SELECTOR SWITCH ) IS TURNED ON,THE MONITOR LIGHTS UP BUT THE LOW IDLING SPEED DOES NOT RISE............................................438 c) WHEN THE MONITOR SWITCH (LOW IDLE SELECTOR SWITCH ) IS TURNED OFF,THE MONITOR GOES OFF BUT THE LOW IDLING SPEED DOES NOT LOWER...........................................439 M-14 ABNORMALITY IN EMERGENCY STEERING NORMAL DISPLAY...........................................................................................................................440 M-15 ABNORMALITY IN EMERGENCY STEERING ACTUATION DISPLAY........................................................................................................................441 a) EMERGENCY STEERING ACTUATION DISPLAY DOES NOT LIGHT UP...................................................................................................................441 b) EMERGENCY STEERING ACTUATION DISPLAY STAYS LIGHTED UP....................................................................................................................441 M-16 ABNORMALITY IN PARKING BRAKE DRAGGING WARNING..............................................................................................................................442 a) WHEN PARKING BRAKE IS APPLIED,BUZZER SOUNDS (INTERMITTENTLY) AND CAUTION LAMP FLASHES EVEN WHEN DIRECTIONAL LEVER IS AT N................................................442 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...........................442 M-17 ABNORMALITY IN PARKING BRAKE DRAGGING WARNING (WHEN JOYSTICK STEERING MODE (IF EQUIPPED))..................................................................................444 a) WHEN PARKING BRAKE IS APPLIED,BUZZER SOUNDS (INTERMITTENTLY) AND CAUTION LAMP FLASHES EVEN WHEN DIRECTIONAL LEVER IS AT N................................................444 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...........................444 M-18 WHEN PARKING BRAKE DRAGGING WARNING IS GIVEN,BUZZER AND CAUTION LAMP ARE ACTUATED CONTINUOUSLY,OR THEY ARE NOT ACTUATED....................................................446 a) ACTUATED CONTINUOUSLY....................................................................................................................................................446 b) NOT ACTUATED.............................................................................................................................................................446 M-19 ABNORMALITY IN BUZZER......................................................................................................................................................447 a) BUZZER DOES NOT SOUND WHEN STARTING SWITCH IS AT ON (FOR 3 SECONDS) (DURING SELF-CHECK)..................................................................................447 b) BUZZER ALWAYS SOUNDS.....................................................................................................................................................447 M-20 CONDITION OF MONITOR SWITCHES IS NOT STORED IN MEMORY......................................................................................................................448 M-21 ABNORMALITY IN FAILURE DISPLAY MODE........................................................................................................................................449 a) DOES NOT ENTER FAILURE DISPLAY MODE......................................................................................................................................449 b) COUNT FOR TIME ELAPSED SINCE FAILURE IN FAILURE DISPLAY MODE DOES NOT ADVANCE............................................................................................449 M-22 BUZZER IS NOT MADE TO SOUND BY TRANSMISSION & JOYSTICK STEERING CONTROLLER.................................................................................................450 M-23 FAILURE CODE IS NOT SENT TO MAIN MONITOR(ABNORMALITY IN NETWORK)(IF EQUIPPED)..............................................................................................451 TROUBLESHOOTING OF MAINTENANCE MONITOR SYSTEM (K MODE)..............................................................................................................................452 ELECTRICAL CIRCUIT DIAGRAM FOR MAINTENANCE MONITOR SYSTEM.......................................................................................................................453 K-1 WHEN STARTING SWITCH IS TURNED ON,ALL LAMPS ON MAINTENANCE DO NOT LIGHT UP FOR 3 SECONDS,MAINTENANCE MONITOR DOES NOT WORK..................................................455 a) NO LAMPS ON MAINTENANCE MONITOR LIGHT UP.................................................................................................................................455 b) SOME LAMPS DO NOT LIGHT UP...............................................................................................................................................455 K-2 WHEN STARTING SWITCH IS TURNED ON,ALL LAMPS ON MAINTENANCE MONITOR LIGHT UP BUT DO NOT GO OUT (EVEN AFTER 3 SECONDS)........................................................456 K-3 WHEN ENGINE IS STARTED IMMEDIATELY AFTER STARTING SWITCH IS TURNED ON (WITHIN 3 SECONDS),NO LAMPS ON MAINTENANCE MONITOR GO OUT.............................................457 K-4 WHEN STARTING SWITCH IS TURNED ON (ENGINE STOPPED),CHECK ITEMS FLASH........................................................................................................459 a) ENGINE OIL LEVEL DISPLAY FLASHES.........................................................................................................................................459 b) ENGINE WATER LEVEL DISPLAY FLASHES.......................................................................................................................................460 K-5 WHEN STARTING SWITCH IS TURNED ON (ENGINE STARTED),CAUTION ITEMS FLASH......................................................................................................461 a) ENGINE OIL PRESSURE DISPLAY FLASHES (CHECK THAT THE ENGINE OIL PURESSURE IS CORRECT).....................................................................................461 b) BATTERY CHARGE LEVEL DISPLAY FLASHES.....................................................................................................................................462 c) BRAKE OIL PRESSURE DISPLAY FLASHES(CHECK THAT THE BRAKE OIL PRESSURE IS CORRECT).........................................................................................463 d) AIR CLEANER (R.H.) CLOGGING DISPLAY FLASHES(CHECK THAT THE AIR CLEANER(R.H)IS NOT CLOGGED.)..............................................................................465 e) AIR CLEANER (L.H.) CLOGGING DISPLAY FLASHES (CHECK THAT THE AIR CLEANER(L.H.)IS NOT CLOGGED).............................................................................466 f) TRANSMISSION OIL FILTER DISPLAY FLASHES(THE TRANSMISSION OIL FILTER MUST NOT BE CLOGGED).................................................................................467 K-6 CAUTION ITEMS ARE FLASHING BUT BUZZER DOES NOT SOUND........................................................................................................................468 K-7 THERE IS NO ABNORMALITY IN MONITOR DISPLAY BUT CAUTION BUZZER SOUNDS........................................................................................................469 K-8 CAUTION ITEMS ARE FLASHING BUT NEITHER CHECK LAMP NOR CAUTION LAMP FLASHES..................................................................................................470 a) CHECK LAMP...............................................................................................................................................................470 b) CAUTION LAMP.............................................................................................................................................................470 K-9 THERE IS NO ABNORMALITY IN MAINTENANCE MONITOR DISPLAY BUT CHECK LAMP OR CAUTION LAMP LIGHTS UP.............................................................................471 a) CHECK LAMP...............................................................................................................................................................471 b) CAUTION LAMP.............................................................................................................................................................471 K-10 ONLY NIGHT LIGHTING OF MAINTENANCE MONITOR DOES NOT LIGHT UP WHEN LIGHTING SWITCH IS TURNED ON.............................................................................472 K-11 NIGHT LIGHTING LIGHTS UP EVEN WHEN LIGHTING SWITCH IS TURNED OFF...........................................................................................................473 K-12 SERVICE METER DOES NOT WORK................................................................................................................................................474 K-13 SERVICE METER IS RUNNING EVEN WHEN ENGINE IS STOPPED.......................................................................................................................474 K-14 ABNORMALITY IN GAUGE DISPLAY...............................................................................................................................................476 a) ABNORMALITY IN FUEL GAUGE................................................................................................................................................476 b) ABNORMALITY IN ENGINE WATER TEMPERATURE GAUGE............................................................................................................................477 c) ABNORMALITY IN TORQUE CONVERTER OIL TEMPERATURE GAUGE....................................................................................................................478 TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE).......................................................................................................................................479 ELECTRICAL CIRCUIT DIAGRAM FOR POWER SUPPLY,ENGINE STARTING,ENGINE STOPPING AND PREHEATING......................................................................................480 ELECTRICAL CIRCUIT DIAGRAM FOR PARKING BRAKE....................................................................................................................................482 E-1 ENGINE DOES NOT START.......................................................................................................................................................483 a) STARTING MOTOR DOES NOT TURN.............................................................................................................................................483 b) STARTING MOTOR TURNS (STD SPEC.).........................................................................................................................................487 E-2 ENGINE DOES NOT STOP (STD SPEC.)............................................................................................................................................489 E-3 ENGINE STOPS WHEN MACHINE IS TRAVELING (STD SPEC.)..........................................................................................................................490 E-4 ABNORMALITY IN PREHEATING SYSTEM............................................................................................................................................492 a) DOES NOT CARRY OUT PREHEATING ...........................................................................................................................................492 b) ALWAYS CARRIES OUT PREHEATING FOR 45 SECONDS.............................................................................................................................493 c) PREHEATING STAYS ON......................................................................................................................................................493 d) PREHEATING TIME BECOMES SHORTER,OR THERE IS FLUCTUATION..................................................................................................................494 E-5 PARKING BRAKE DOES NOT HAVE EFFECT..........................................................................................................................................496 a) PARKING BRAKE HAS NO EFFECT WHEN PARKING BRAKE SWITCH IS TURNED ON.......................................................................................................496 b) PARKING BRAKE HAS NO EFFECT WHEN BRAKE PRESSURE (ACCUMULATOR PRESSURE) DROPS (DOES NOT WORK AS EMERGENCY BRAKE)..........................................................496 E-6 PARKING BRAKE IS APPLIED WHEN MACHINE IS TRAVELING..........................................................................................................................497 E-7 PARKING BRAKE IS RELEASED WHEN STARTING SWITCH IS TURNED ON.................................................................................................................499 E-8 TRANSMISSION DOES NOT CHANGE TO NEUTRAL WHEN PARKING BRAKE IS APPLIED (BUT PARKING BRAKE WORKS NORMALLY)....................................................................499 E-9 KICK-DOWN SWITCH DOES NOT WORK .............................................................................................................................................501 a) KICK-DOWN SWITCH DOES NOT WORK EVEN THOUGH GEAR SHIFT WORKS NORMALLY.....................................................................................................501 b) KICK-DOWN CANNOT BE CANCELED.............................................................................................................................................502 E-10 ABNORMALITY IN LIGHTING UP OF FRONT WORKING LAMP...........................................................................................................................503 E-11 ABNORMALITY IN LIGHTING UP OF REAR WORKING LAMP............................................................................................................................503 E-12 ABNORMALITY IN TRANSMISSION CUT-OFF........................................................................................................................................503 E-13 ABNORMALITY IN LOW IDLING SELECTION........................................................................................................................................503 E-14 ABNORMALITY IN PARKING BRAKE DRAGGING WARNING..............................................................................................................................503 E-15 ABNORMALITY IN BUZZER......................................................................................................................................................503 TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (H MODE).........................................................................................................................504 H-1 MACHINE DOES NOT MOVE.......................................................................................................................................................505 H-2 MACHINE LACKS POWER OR SPEED (EVERY SPEED RANGE)............................................................................................................................506 H-3 EXCESSIVE TIME LAG WHEN STARTING MACHINE OR SHIFTING GEAR...................................................................................................................507 H-4 TORQUE CONVERTER OIL TEMPERATURE IS HIGH....................................................................................................................................508 H-5 STEERING DOES NOT TURN .....................................................................................................................................................509 H-6 STEERING DOES NOT TURN[MACHINE WITH JOYSTICK(IF EQUIPPED)]..................................................................................................................510 H-7 TURNING,RESPONSE OF STEERING IS POOR .......................................................................................................................................511 H-8 TURNING,RESPONSE OF STEERING IS POOR[MACHINE WITH JOYSTICK(IF EQUIPPED)]....................................................................................................512 H-9 STEERING IS HEAVY...........................................................................................................................................................513 H-10 JOYSTICK LEVER IS HEAVY[MACHINE WITH JOYSTICK(IF EQUIPPED)]................................................................................................................513 H-11 STEERING WHEEL SHAKES OR JERKS.............................................................................................................................................514 H-12 STEERING WHEEL SHAKES OR JERKS[MACHINE WITH JOYSTICK(IF EQUIPPED)].........................................................................................................515 H-13 TURNING RADIUS IS DIFFERENT BETWEEN LEFT AND RIGHT AT MAXIMUM STEERING.....................................................................................................516 H-14 WHEEL BRAKES DO NOT WORK OR BRAKING EFFECT IS POOR.........................................................................................................................517 H-15 WHEEL BRAKES ARE NOT RELEASED OR BRAKES DRAG...............................................................................................................................518 H-16 BLADE DOES NOT RISE........................................................................................................................................................519 H-17 BLADE MOVES SLOWLY OR DOES NOT HAVE SUFFICIENT LIFTING POWER...............................................................................................................520 H-18 WHEN RAISING BLADE,BECOMES SLOW AT CERTAIN HEIGHT .........................................................................................................................521 H-19 LIFT CYLINDER CANNOT HOLD DOWN BLADE.......................................................................................................................................521 H-20 BLADE HAS LARGE AMOUNT OF HYDRAULIC DRIFT..................................................................................................................................521 H-21 BLADE FLUCTUATES WHILE WORKING.............................................................................................................................................522 H-22 BLADE DROPS MOMENTARILY WHEN LEVER IS OPERATED FROM HOLD TO RAISE..........................................................................................................522 H-23 BLADE DOES NOT TILT BACK...................................................................................................................................................523 H-24 BLADE MOVES SLOWLY OR HAS INSUFFICIENT TILT BACK POWER.....................................................................................................................524 H-25 BLADE MOVEMENT BECOMES SLOW DURING TILT BACK...............................................................................................................................525 H-26 LIFT CYLINDER CANNOT HOLD DOWN BUCKET......................................................................................................................................525 H-27 BLADE HAS LARGE AMOUNT OF HYDRAULIC DRIFT..................................................................................................................................525 H-28 BLADE CONTROL LEVER DOES NOT MOVE SMOOTHLY.................................................................................................................................526 TROUBLESHOOTING OF JOYSTICK STEERING CONTROL SYSTEM (J MODE)........................................................................................................................527 JUDGEMENT TABLE FOR JOYSTICK STEERING CONTROL SYSTEM RELATED PARTS..............................................................................................................528 ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE......................................................................................................529 ELECTRICAL CIRCUIT DIAGRAM FOR JOYSTICK STEERING CONTROL SYSTEM.................................................................................................................533 J-1 FAILURE CODE [56] (SHORT CIRCUIT,DISCONNECTION IN CAUTION RELAY OUTPUT) IS DISPLAYED........................................................................................535 J-2 FAILURE CODE [57] (SHORT CIRCUIT IN STEERING RIGHT SOLENOID (DETECTED WHEN SIGNAL IS OUTPUT)) IS DISPLAYED..................................................................536 J-3 FAILURE CODE [58] (SHORT CIRCUIT IN STEERING LEFT SOLENOID (DETECTED WHEN SIGNAL IS OUTPUT)) IS DISPLAYED...................................................................537 J-4 FAILURE CODE [59] (SHORT CIRCUIT IN STEERING RIGHT SOLENOID (POWER SUPPLY SIDE)) IS DISPLAYED...............................................................................538 J-5 FAILURE CODE [60] (SHORT CIRCUIT IN STEERING LEFT SOLENOID (POWER SUPPLY SIDE)) IS DISPLAYED................................................................................539 J-6 FAILURE CODE [61] (SHORT CIRCUIT,DISCONNECTION IN STEERING SOLENOID CUT RELAY OUTPUT) IS DISPLAYED..........................................................................540 J-7 FAILURE CODE [62] (SHORT CIRCUIT,DISCONNECTION IN JOYSTICK STEERING NEUTRAL CIRCUIT) IS DISPLAYED...........................................................................542 J-8 FAILURE CODE [63] (SHORT CIRCUIT,DISCONNECTION IN JOYSTICK STEERING LEVER POTENTIOMETER) IS DISPLAYED.......................................................................543 J-9 ABNORMALITY IN POWER SUPPLY,POWER SUPPLY VOLTAGE............................................................................................................................544 J-10 ABNORMALITY IN JOYSTICK STEERING ON-OFF CIRCUIT............................................................................................................................545 J-11 DISCONNECTION IN STEERING RIGHT SOLENOID...................................................................................................................................546 J-12 DISCONNECTION IN STEERING LEFT SOLENOID....................................................................................................................................547 30 DISASSEMBLY AND ASSEMBLY.................................................................................................................................................................548 METHOD OF USING MANUAL .................................................................................................................................................................550 PRECAUTIONS WHEN CARRYING OUT OPERATION.................................................................................................................................................552 SPECIAL TOOL LIST.......................................................................................................................................................................554 SKETCHES OF SPECIAL TOOLS...............................................................................................................................................................560 REMOVAL AND INSTALLATION OF STARTING MOTOR..............................................................................................................................................568 REMOVAL AND INSTALLATION OF ALTERNATOR..................................................................................................................................................569 REMOVAL AND INSTALLATION OF ENGINE OIL COOLER...........................................................................................................................................570 REMOVAL AND INSTALLATION OF FUEL INJECTION PUMP FOR LEFT BANK...........................................................................................................................571 REMOVAL AND INSTALLATION OF FUEL INJECTION PUMP FOR RIGHT BANK..........................................................................................................................572 REMOVAL AND INSTALLATION OF WATER PUMP..................................................................................................................................................573 REMOVAL AND INSTALLATION OF NOZZLE HOLDER...............................................................................................................................................574 REMOVAL AND INSTALLATION OF TURBOCHARGER................................................................................................................................................575 REMOVAL AND INSTALLATION OF ENGINE FRONT SEAL...........................................................................................................................................576 REMOVAL AND INSTALLATION OF ENGINE REAR SEAL............................................................................................................................................578 REMOVAL AND INSTALLATION OF CYLINDER HEAD...............................................................................................................................................580 REMOVAL AND INSTALLATION OF RADIATOR....................................................................................................................................................585 REMOVAL AND INSTALLATION OF ENGINE......................................................................................................................................................587 REMOVAL AND INSTALLATION OF DAMPER......................................................................................................................................................592 DISASSEMBLY AND ASSEMBLY OF DAMPER......................................................................................................................................................593 REMOVAL AND INSTALLATION OF TORQUE CONVERTER AND TRANSMISSION ASSEMBLY..................................................................................................................597 DISASSEMBLY AND ASSEMBLY OF TORQUE CONVERTER............................................................................................................................................604 DISASSEMBLY AND ASSEMBLY OF TORQUE CONVERTER VALVE......................................................................................................................................611 DISASSEMBLY AND ASSEMBLY OF TRANSMISSION................................................................................................................................................612 REMOVAL AND INSTALLATION OF TRANSMISSION VALVE..........................................................................................................................................636 DISASSEMBLY AND ASSEMBLY OF TRANSMISSION VALVE..........................................................................................................................................637 DISASSEMBLY AND ASSEMBLY OF TRANSFER....................................................................................................................................................641 DISASSEMBLY AND ASSEMBLY OF PTO.........................................................................................................................................................654 REMOVAL AND INSTALLATION OF CENTER SUPPORT..............................................................................................................................................659 DISASSEMBLY AND ASSEMBLY OF CENTER SOPPORT..............................................................................................................................................661 DISASSEMBLY AND ASSEMBLY OF DRIVE SHAFT.................................................................................................................................................665 REMOVAL AND INSTALLATION OF FRONT AXLE..................................................................................................................................................668 REMOVAL AND INSTALLATION OF REAR AXLE...................................................................................................................................................670 REMOVAL AND INSTALLATION OF DIFFERENTIAL................................................................................................................................................675 DISASSEMBLY AND ASSEMBLY OF DIFFERENTIAL................................................................................................................................................677 DISASSEMBLY AND ASSEMBLY OF FINAL DRIVE.................................................................................................................................................685 REMOVAL AND INSTALLATION OF ORBIT-ROLL..................................................................................................................................................690 REMOVAL AND INSTALLATION OF EMERGENCY STEERING PUMP.....................................................................................................................................692 REMOVAL AND INSTALLATION OF DIVERTER VALVE..............................................................................................................................................693 DISASSEMBLY AND ASSEMBLY OF DIVERTER VALVE..............................................................................................................................................694 REMOVAL AND INSTALLATION OF ACCUMULATOR CHARGE VALVE....................................................................................................................................696 DISASSEMBLY AND ASSEMBLY OF ACCUMULATOR CHARGE VALVE....................................................................................................................................697 REMOVAL AND INSTALLATION OF STEERING STOP VALVE.........................................................................................................................................699 REMOVAL AND INSTALLATION OF STEERING CYLINDER...........................................................................................................................................700 REMOVAL AND INSTALLATION OF STEERING VALVE..............................................................................................................................................702 REMOVAL AND INSTALLATION OF BRAKE VALVE.................................................................................................................................................704 REMOVAL AND INSTALLATION OF SLACK ADJUSTER..............................................................................................................................................705 DISASSEMBLY AND ASSEMBLY OF SLACK ADJUSTER..............................................................................................................................................706 REMOVAL AND INSTALLATION OF BRAKE.......................................................................................................................................................708 DISASSEMBLY AND ASSEMBLY OF BRAKE.......................................................................................................................................................709 REMOVAL AND INSTALLATION OF PARKING BRAKE CALIPERS......................................................................................................................................714 DISASSEMBLY AND ASSEMBLY OF PARKING BRAKE CALIPERS......................................................................................................................................715 REMOVAL AND INSTALLATION OF PARKING BRAKE PAD...........................................................................................................................................717 REMOVAL AND INSTALLATION OF PARKING BRAKE SPRING CYLINDER...............................................................................................................................718 REMOVAL AND INSTALLATION OF BRAKE OIL TANK..............................................................................................................................................719 REMOVAL AND INSTALLATION OF HYDRAULIC PUMP ASSEMBLY.....................................................................................................................................720 REMOVAL AND INSTALLATION OF SERVO CYLINDER..............................................................................................................................................723 REMOVAL AND INSTALLATION OF HYDRAULIC TANK AND FITER CASE ASSEMBLY......................................................................................................................724 REMOVAL AND INSTALLATION OF PPC VALVE...................................................................................................................................................726 DISASSEMBLY AND ASSEMBLY OF PPC VALVE...................................................................................................................................................728 REMOVAL AND INSTALLATION OF WORK EQUIPMENT CONTROL VALVE................................................................................................................................729 DISASSEMBLY AND ASSEMBLY OF WORK EQUIPMENT CONTROL VALVE................................................................................................................................731 REMOVAL AND INSTALLATION OF CAB.........................................................................................................................................................734 REMOVAL AND INSTALLATION OF FLOOR FRAME.................................................................................................................................................736 REMOVAL AND INSTALLATION OF CENTER HINGE PIN............................................................................................................................................739 REMOVAL AND INSTALLATION OF WORK EQUIPMENT..............................................................................................................................................751 REMOVAL AND INSTALLATION OF LIFT CYLINDER ASSEMBLY......................................................................................................................................754 REMOVAL AND INSTALLATION OF PITCH & TILT CYLINDER.......................................................................................................................................755 REMOVAL AND INSTALLATION OF AIR CONDITIONER UNIT........................................................................................................................................756 REMOVAL AND INSTALLATION OF AIR CONDITIONER COMPRESSOR..................................................................................................................................758 REMOVAL AND INSTALLATION OF RECEIVER TANK...............................................................................................................................................759 REMOVAL AND INSTALLATION OF AIR CONDITIONER CONDENSER...................................................................................................................................760 REMOVAL AND INSTALLATION OF TRANSMISSION AND STEERING CONTROLLER........................................................................................................................761 REMOVAL AND INSTALLATION OF MAIN MONITOR................................................................................................................................................762 REMOVAL AND INSTALLATION OF FUEL TANK...................................................................................................................................................764 REMOVAL AND INSTALLATION OF COUNTERWEIGHT...............................................................................................................................................766 40 MAINTENANCE STANDRAD.....................................................................................................................................................................767 ENGINE MOUNT............................................................................................................................................................................768 TRANSMISSION MOUNT......................................................................................................................................................................769 DAMPER..................................................................................................................................................................................770 TORQUE CONVERTER CHARGING,PPC AND BRAKE PUMP............................................................................................................................................772 TORQUE CONVERTER ......................................................................................................................................................................774 TORQUE CONVERTER REGULATOR VALVE........................................................................................................................................................775 TRANSMISSION(1/2).......................................................................................................................................................................776 TRANSMISSION(2/2).......................................................................................................................................................................778 TRANSFER................................................................................................................................................................................779 TRANSMISSION CONTROL VALVE..............................................................................................................................................................781 DRIVE SHAFT.............................................................................................................................................................................786 CENTER SUPPORT..........................................................................................................................................................................787 DIFFERENTIAL(1/2).......................................................................................................................................................................788 DIFFERENTIAL(2/2).......................................................................................................................................................................789 FINAL DRIVE.............................................................................................................................................................................791 AXLE MOUNT..............................................................................................................................................................................793 CENTER HINGE PIN........................................................................................................................................................................795 STEERING COLUMN.........................................................................................................................................................................797 STEERING DEMAND VALVE...................................................................................................................................................................798 DIVERTER VALVE..........................................................................................................................................................................800 STEERING CYLINDER MOUNT.................................................................................................................................................................801 EMERGENCY STEERING PUMP.................................................................................................................................................................802 BRAKE VALVE.............................................................................................................................................................................803 SLACK ADJUSTER..........................................................................................................................................................................806 BRAKE...................................................................................................................................................................................807 PARKING BRAKE...........................................................................................................................................................................809 PPC VALVE...............................................................................................................................................................................811 PPC RELIEF VALVE........................................................................................................................................................................813 STEERING PUMP...........................................................................................................................................................................814 SWITCH PUMP.............................................................................................................................................................................815 MAIN PISTON PUMP........................................................................................................................................................................817 CONTROL PUMP............................................................................................................................................................................819 MAIN CONTROL VALVE......................................................................................................................................................................820 HYDRAULIC CYLINDER......................................................................................................................................................................824 WORK EQUIPMENT LINKAGE..................................................................................................................................................................827 BRAKE COOLING PUMP......................................................................................................................................................................832 90 OTHERS...................................................................................................................................................................................833 WORK EQUIPMENT HYDRAULIC CIRCUIT DIAGRAM(1/2)...........................................................................................................................................834 WORK EQUIPMENT HYDRAULIC CIRCUIT DIAGRAM(2/2)...........................................................................................................................................835 ELECTRIC CIRCUIT DIAGRAM (1/7)..........................................................................................................................................................836 ELECTRIC CIRCUIT DIAGRAM (2/7)..........................................................................................................................................................837 ELECTRIC CIRCUIT DIAGRAM (3/7)..........................................................................................................................................................838 ELECTRIC CIRCUIT DIAGRAM (4/7)..........................................................................................................................................................839 ELECTRIC CIRCUIT DIAGRAM (5/7)..........................................................................................................................................................840 ELECTRIC CIRCUIT DIAGRAM (6/7)..........................................................................................................................................................841 ELECTRIC CIRCUIT DIAGRAM (7/7)..........................................................................................................................................................842
KOMATSU WD900-3 WHEEL DOZER SHOP MANUAL 50001 AND UP – PDF DOWNLOAD:
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