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KOMATSU WD900-3 SHOP MANUAL SEBM036908 – PDF DOWNLOAD
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Description
KOMATSU WD900-3 SHOP MANUAL SEBM036908 – PDF DOWNLOAD
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KOMATSU WD900-3 SHOP MANUAL SEBM036908 – PDF DOWNLOAD
Language : English
Pages : 912
Downloadable : Yes
File Type : PDF
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TABLE OF CONTENTS:
KOMATSU WD900-3 SHOP MANUAL SEBM036908 – PDF DOWNLOAD
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 .................................................................................................................................................................. 19 POWER TRAIN............................................................................................................................................................................. 20 POWER TRAIN SYSTEM...................................................................................................................................................................... 21 ENGINE CONTROL.......................................................................................................................................................................... 22 SERVO CYLINDER.......................................................................................................................................................................... 23 RADIATOR AND COOLER..................................................................................................................................................................... 27 DAMPER.................................................................................................................................................................................. 28 TORQUE CONVERTER AND TRANSMISSION PIPING................................................................................................................................................ 29 TRANSMISSION HYDRAULIC SYSTEM DIAGRAM................................................................................................................................................... 30 TRANSMISSION HYDRAULIC CIRCUIT DIAGRAM.................................................................................................................................................. 31 TORQUE CONVERTER........................................................................................................................................................................ 32 TRANSMISSION............................................................................................................................................................................ 37 TRANSFER................................................................................................................................................................................ 47 TRANSMISSION CONTROL VALVE.............................................................................................................................................................. 48 TORQUE CONVERTER OIL COOLER............................................................................................................................................................. 64 DRIVE SHAFT............................................................................................................................................................................. 65 CENTER SUPPORT.......................................................................................................................................................................... 66 AXLE.................................................................................................................................................................................... 67 FINAL DRIVE............................................................................................................................................................................. 72 CENTER HINGE PIN........................................................................................................................................................................ 73 AXLE MOUNT.............................................................................................................................................................................. 74 TIRE AND WHEEL ......................................................................................................................................................................... 76 STEERING PIPING DIAGRAM................................................................................................................................................................. 77 STEERING COLUMN......................................................................................................................................................................... 79 STEERING PUMP........................................................................................................................................................................... 80 SWITCH PUMP............................................................................................................................................................................. 85 STEERING DEMAND VALVE................................................................................................................................................................... 88 STEERING UNIT (ORBIT-ROLL VALVE)........................................................................................................................................................ 99 PROPORTIONAL SOLENOID VALVE.............................................................................................................................................................102 TOW-WAY RESTRICTOR VALVE................................................................................................................................................................103 DIVERTER VALVE..........................................................................................................................................................................104 BRAKE PIPING............................................................................................................................................................................108 BRAKE CIRCUIT DIAGRAM...................................................................................................................................................................110 BRAKE VALVE.............................................................................................................................................................................114 CHARGE VALVE............................................................................................................................................................................126 ACCUMULATOR (FOR BRAKE).................................................................................................................................................................131 SLACK ADJUSTER..........................................................................................................................................................................132 BRAKE...................................................................................................................................................................................135 PARKING BRAKE...........................................................................................................................................................................136 SPRING CYLINDER.........................................................................................................................................................................139 PARKING BRAKE SOLENOID VALVE............................................................................................................................................................140 HYDRAULIC PIPING .......................................................................................................................................................................142 WORK EQUIPMENT SOLENOID VALVE...........................................................................................................................................................144 WORK EQUIPMENT LEVER LINKAGE............................................................................................................................................................154 HYDRAULIC TANK..........................................................................................................................................................................156 MAIN PISTON PUMP........................................................................................................................................................................160 ES VALVE(ENGINE SENSING VALVE)..........................................................................................................................................................172 SERVO VALVE.............................................................................................................................................................................174 PPC VALVE(PROPORTIONAL PRESSURE VALVE)..................................................................................................................................................178 PPC RELIEF VALVE........................................................................................................................................................................182 ACCUMULATOR (FOR PPC VALVE).............................................................................................................................................................183 MAIN CONTROL VALVE......................................................................................................................................................................184 LUBRICATION OF WORK EQUIPMENT...........................................................................................................................................................192 WORK EQUIPMENT LINKAGE..................................................................................................................................................................194 CAB.....................................................................................................................................................................................196 ROPS CANOPY.............................................................................................................................................................................197 AIR CONDITIONER.........................................................................................................................................................................198 MACHINE MONITOR SYSTEM..................................................................................................................................................................201 MAIN MONITOR............................................................................................................................................................................202 MAINTENANCE MONITOR.....................................................................................................................................................................206 ENGINE STARTING CIRCUIT.................................................................................................................................................................209 ENGINE STOP CIRCUIT.....................................................................................................................................................................210 ELECTRICAL TRANSMISSION CONTROL.........................................................................................................................................................211 BLADE CONTROL SWITCH(KICK-DOWN,HOLD SWITCH).............................................................................................................................................214 JOYSTICK STEERING SYSTEM................................................................................................................................................................215 TRANSMISSION AND JOYSTICK STEERING CONTROLLER...........................................................................................................................................217 ELECTRIC PARKING BRAKE CONTROL..........................................................................................................................................................219 BRAKE COOLING SYSTEM....................................................................................................................................................................229 55℃ SPECIFICATION.......................................................................................................................................................................238 20 TESTING AND ADJUSTING....................................................................................................................................................................241 STANDARD VALUE TABLE FOR ENGINE.........................................................................................................................................................242 STANDARD VALUE TABLE FOR CHASSIS........................................................................................................................................................243 STANDARD VALUE TABLE FOR ELECTRICAL PARTS...............................................................................................................................................250 TESTING AND ADJUSTING...................................................................................................................................................................261 TABLE OF TOOLS FOR TESTING, ADJUSTING, AND TROUBLESHOOTING..........................................................................................................................262 MEASURING ENGINE SPEED..............................................................................................................................................................265 MEASURING EXHAUST GAS COLOR.........................................................................................................................................................266 ADJUSTING VALVE CLEARANCE...........................................................................................................................................................267 MEASURING COMPRESSION PRESSURE......................................................................................................................................................268 MEASURING BLOW-BY PRESSURE..........................................................................................................................................................269 TESTING AND ADJUSTING FUEL INJECTION TIMING.........................................................................................................................................270 MEASURING ENGINE OIL PRESSURE.......................................................................................................................................................271 MEASURING EXHAUST TEMPERATURE.......................................................................................................................................................272 MEASURING AIR SUPPLY PRESSURE (BOOST PRESSURE)......................................................................................................................................273 TESTING AND ADJUSTING ALTERNATOR BELT TENSION.......................................................................................................................................274 TESTING AND ADJUSTING BELT TENSION FOR AIR CONDITIONER COMPRESSOR...................................................................................................................275 MEASURING ACCELERATOR PEDAL OPERATING EFFORT........................................................................................................................................276 MEASURING ACCELERATOR PEDAL OPERATING ANGLE.........................................................................................................................................277 ADJUSTING FUEL CONTROL CABLE,LINKAGE,AND SERVO CYLINDER.............................................................................................................................278 ADJUSTING ENGINE STOPPING MOTOR CABLE...............................................................................................................................................280 TESTING OF UPPER DRIVE SHAFT SLIDING PART...........................................................................................................................................281 TESTING AND ADJUSTING TORQUE CONVERTER AND TRANSMISSION OIL PRESSURE................................................................................................................283 PROCEDURE FOR OPERATING EMERGENCY STEERING SPOOL WHEN TRANSMISSION VALVE FAILS......................................................................................................285 TESTING AND ADJUSTING STEERING OIL PRESSURE.........................................................................................................................................287 TESTING AND ADJUSTING EMERGENCY STEERING OIL PRESSURE...............................................................................................................................288 BLEEDING AIR FROM STEERING CIRCUIT .................................................................................................................................................289 TESTING AND ADJUSTING STEERING STOP VALVE...........................................................................................................................................290 TESTING WHEEL BRAKE PERFORMANCE ....................................................................................................................................................291 TESTING WHEEL BRAKE OIL PRESSURE DROP...............................................................................................................................................292 MEASURING WEAR OF WHEEL BRAKE DISC..................................................................................................................................................294 TESTING AND ADJUSTING ACCUMULATOR CHARGE CUT-IN AND CUT-OUT PRESSURE................................................................................................................295 TESTING OF ACCUMULATOR NITROGEN GAS PRESSURE AND PROCEDURE FOR CHARGING ACCUMULATOR WITH NITROGEN GAS...............................................................................297 BLEEDING AIR FROM WHEEL BRAKE CIRCUIT ..............................................................................................................................................305 TESTING PARKING BRAKE PERFORMANCE...................................................................................................................................................306 MEASURING PARKING BRAKE SOLENOID OUTPUT PRESSURE....................................................................................................................................307 CHECKING AND ADJUSTING PARKING BRAKE PAD............................................................................................................................................308 TESTING AND ADJUSTING PPC PRESSURE .................................................................................................................................................309 ADJUSTING PPC VALVE LINKAGE.........................................................................................................................................................310 TESTING AND ADJUSTING WORK EQUIPMENT HYDRAULIC PRESSURE.............................................................................................................................311 BLEEDING AIR FROM PISTON PUMP ......................................................................................................................................................313 BLEEDING AIR FROM WORK EQUIPMENT CIRCUIT............................................................................................................................................314 ADJUSTING WORK EQUIPMENT LEVER LINKAGE .............................................................................................................................................315 RELEASING REMAINING PRESSURE IN HYDRAULIC CIRCUIT ..................................................................................................................................316 ADJUSTING SPEEDOMETER MODULE OF MAIN MONITOR .......................................................................................................................................317 ADJUSTING JOYSTICK LEVER POTENTIOMETER..............................................................................................................................................318 ADJUSTING JOYSTICK LEVER NEUTRAL DETECTION SWITCH...................................................................................................................................319 TROUBLESHOOTING.........................................................................................................................................................................321 POINTS TO REMEMBER WHEN TROUBLESHOOTING ............................................................................................................................................322 SEQUENCE OF EVENTS IN TROUBLESHOOTING ..............................................................................................................................................323 POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE ...................................................................................................................................324 CHECKS BEFORE TROUBLESHOOTING ......................................................................................................................................................332 CONNECTOR TYPES AND MOUNTING LOCATIONS..............................................................................................................................................333 CONNECTOR LOCATION STEREOGRAM.......................................................................................................................................................338 CONNECTION TABLE FOR CONNECTOR PIN NUMBERS .........................................................................................................................................344 T-BRANCH BOX AND T-BRANCH TABLE.....................................................................................................................................................369 EXPLANATION OF FUNCTIONS OF ELECTRIC CONTROL MECHANISM..............................................................................................................................372 METHOD OF DISPLAYING ACTION CODE AND FAILURE CODE...................................................................................................................................376 CHART OF ACTION CODES AND FAILURE CODES,AND RE-ENACTION ............................................................................................................................378 TRANSMISSION CONTROLLER LED DISPLAY.................................................................................................................................................381 METHOD OF USING JUDGEMENT TABLE.....................................................................................................................................................383 METHOD OF USING TROUBLESHOOTING CHARTS..............................................................................................................................................384 METHOD OF USING MATRIX TROUBLESHOOTING TABLES.......................................................................................................................................386 TROUBLESHOOTING OF ENGINE SYSTEM (S MODE)...........................................................................................................................................389 METHOD OF USING TROUBLESHOOTING CHARTS..........................................................................................................................................390 S-1 STARTING PERFORMANCE IS POOR (STARTING ALWAYS TAKES TIME)...................................................................................................................394 S-2 ENGINE DOES NOT START.......................................................................................................................................................395 (1) ENGINE DOES NOT TURN....................................................................................................................................................395 (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)....396 (3) EXHAUST GAS COMES OUT BUT ENGINE DOES NOT START (FUEL IS BEING INJECTED)................................................................................................397 S-3 ENGINE DOES NOT PICK UP SMOOTHLY (FOLLOW-UP IS POOR)........................................................................................................................398 S-4 ENGINE STOPS DURING OPERATIONS(FOR V TYPE ENGINE,INCLUDING CASES WHERE ONE BANK STOPS)......................................................................................399 S-5 ENGINE DOES NOT ROTATE SMOOTHLY (HUNTING)...................................................................................................................................400 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)................................401 S-7 EXHAUST GAS IS BLACK (INCOMPLETE COMBUSTION)................................................................................................................................402 S-8 OIL CONSUMPTION IS EXCESSIVE (OR EXHAUST GAS IS BLUE).......................................................................................................................403 S-9 OIL BECOMES CONTAMINATED QUICKLY............................................................................................................................................404 S-10 FUEL CONSUMPTION IS EXCESSIVE..............................................................................................................................................405 S-11 OIL IS IN COOLING WATER,OR WATER SPURTS BACK,OR WATER LEVEL GOES DOWN......................................................................................................406 S-12 OIL PRESSURE LAMP LIGHTS UP (DROP IN OIL PRESSURE).........................................................................................................................407 S-13 OIL LEVEL RISES ...........................................................................................................................................................408 S-14 WATER TEMPERATURE BECOMES TOO HIGH (OVERHEATING)...........................................................................................................................409 S-15 ABNORMAL NOISE IS MADE.....................................................................................................................................................410 S-16 VIBRATION IS EXCESSIVE.....................................................................................................................................................411 TROUBLESHOOTING OF TRANSMISSION CONTROL SYSTEM (T MODE).............................................................................................................................413 JUDGEMENT TABLE FOR TRANSMISSION CONTROL SYSTEM RELATED PARTS ..................................................................................................................414 ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE .....................................................................................................416 ELECTRICAL CIRCUIT DIAGRAM FOR TRANSMISSION CONTROL SYSTEM......................................................................................................................420 T-1 FAILURE CODE [10] (SHORT CIRCUIT,DISCONNECTION,SHORT CIRCUIT WITH POWER SOURCE IN BACKUP LAMP RELAY) IS DISPLAYED...........................................................422 T-2 FAILURE CODE [12] (SHORT CIRCUIT,DISCONNECTION,SHORT CIRCUIT WITH POWER SOURCE IN F SOLENOID) IS DISPLAYED..................................................................423 T-3 FAILURE CODE [13] (SHORT CIRCUIT,DISCONNECTION,SHORT CIRCUIT WITH POWER SOURCE IN R SOLENOID) IS DISPLAYED..................................................................424 T-4 FAILURE CODE [14] (SHORT CIRCUIT,DISCONNECTION,SHORT CIRCUIT WITH POWER SOURCE IN 1ST SOLENOID) IS DISPLAYED................................................................425 T-5 FAILURE CODE [15] (SHORT CIRCUIT,DISCONNECTION,SHORT CIRCUIT WITH POWER SOURCE IN 2ND SOLENOID) IS DISPLAYED................................................................426 T-6 FAILURE CODE [16] (SHORT CIRCUIT,DISCONNECTION,SHORT CIRCUIT WITH POWER SOURCE IN 3RD SOLENOID) IS DISPLAYED................................................................427 T-7 FAILURE CODE [19] (SHORT CIRCUIT,DISCONNECTION IN JOYSTICK DIRECTIONAL SWITCH SYSTEM) IS DISPLAYED..........................................................................428 T-8 FAILURE CODE [20] (SHORT CIRCUIT,DISCONNECTION IN DIRECTIONAL SWITCH SYSTEM) IS DISPLAYED...................................................................................430 T-9 FAILURE CODE [21] (SHORT CIRCUIT,DISCONNECTION IN RANGE SWITCH SYSTEM) IS DISPLAYED.........................................................................................434 T-10 FAILURE CODE [22] (DISCONNECTION IN TRAVEL SPEED SENSOR SYSTEM) IS DISPLAYED...............................................................................................437 T-11 FAILURE CODE [23] (SHORT CIRCUIT,DISCONNECTION IN ENGINE SPEED SENSOR SYSTEM) IS DISPLAYED.................................................................................438 T-12 SHIFT-UP SIGNAL SYSTEM(JOYSTICK(IF EQUIPPED)MANUAL SHIFT)AND HOLD SIGNAL SYSTEM(AUTO-SHIFT(IF EQUIPPED)....................................................................439 T-13 KICK-DOWN SIGNAL SYSTEM AND SHIFT-DOWN SIGNAL SYSTEM(JOYSTICK(IF EQUIPPED)MANUAL SHIFT)....................................................................................439 T-14 TRANSMISSION CUT-OFF SIGNAL SYSTEM.........................................................................................................................................440 T-15 NEUTRALIZER SIGNAL SYSTEM..................................................................................................................................................441 T-16 BUZZER SIGNAL SYSTEM.......................................................................................................................................................442 T-17 NOTWORK SYSTEM.............................................................................................................................................................443 T-18 TRANSMISSION CONTROLLER POWER SOURCE SYSTEM................................................................................................................................444 T-19 SHORT CIRCUIT IN TRAVEL SPEED SENSOR SYSTEM................................................................................................................................445 T-2O ABNORMALITY IN MACHINE SELECTION WIRING HARNESS............................................................................................................................446 TROUBLESHOOTING OF MAIN MONITOR SYSTEM (M MODE).....................................................................................................................................447 TROUBLE DATA DISPLAY............................................................................................................................................................449 ELECTRICAL CIRCUIT DIAGRAM FOR MAIN MONITOR SYSTEM..............................................................................................................................452 M-1 MAIN MONITOR DOES NOT WORK..................................................................................................................................................454 M-2 WHEN STARTING SWITCH IS TURNED ON (WITHIN 3 SECONDS) AND ENGINE IS STARTED IMMEDIATELY,ALL LAMPS STAY LIGHTED UP............................................................455 M-3 SPEEDOMETER DISPLAY DOES NOT WORK PROPERLY..................................................................................................................................456 M-4 ABNORMALITY IN SHIFT INDICATOR .............................................................................................................................................457 a) DISPLAYS N EVEN WHEN DIRECTIONAL SWITCH IS AT F..........................................................................................................................457 b) DISPLAYS N EVEN WHEN DIRECTIONAL SWITCH IS AT R..........................................................................................................................457 c) DOES NOT DISPLAY N EVEN WHEN DIRECTIONAL SWITCH IS AT N (DISPLAYS 1ST-3RD)...............................................................................................458 d) DOES NOT DISPLAY 1ST EVEN WHEN GEAR SHIFT LEVER IS AT 1ST POSITION(DIRECTIONAL LEVER IS AT F OR R POSITION)..............................................................458 e) DOES NOT DISPLAY 2ND EVEN WHEN GEAR SHIFT LEVER IS AT 2ND POSITION(DIRECTIONAL LEVER IS AT F OR R POSITION)..............................................................458 f) DOES NOT DISPLAY 3RD EVEN WHEN GEAR SHIFT LEVER IS AT 3RD POSITION(DIRECTIONAL LEVER IS AT F OR R POSITION)..............................................................459 M-5 HIGH BEAM DISPLAY DOES NOT LIGHT UP.........................................................................................................................................460 M-6 TURN SIGNAL DISPLAY DOES NOT LIGHT UP.......................................................................................................................................461 a) L.H. TURN SIGNAL DISPLAY DOES NOT LIGHT UP...............................................................................................................................461 b) R.H. TURN SIGNAL DISPLAY DOES NOT LIGHT UP...............................................................................................................................461 M-7 ABNORMALITY IN PARKING DISPLAY..............................................................................................................................................462 a) PARKING LAMP DISPLAY DOES NOT LIGHT UP...................................................................................................................................462 b) PARKING LAMP DISPLAY STAYS LIGHTED UP....................................................................................................................................462 M-8 ABNORMALITY IN PREHEATING SYSTEM............................................................................................................................................463 a) DOES NOT CARRY OUT PREHEATING............................................................................................................................................463 b) ALWAYS CARRIES OUT PREHEATING FOR 45 SECONDS.............................................................................................................................464 c) PREHEATING STAYS ON......................................................................................................................................................464 d) PREHEATING TIME BECOMES SHORTER,OR THERE IS VARIATION....................................................................................................................465 M-9 NIGHT LIGHTING DOES NOT LIGHT UP............................................................................................................................................467 M-10 ABNORMALITY IN FRONT WORKING LAMP..........................................................................................................................................468 a) NEITHER MONITOR DISPLAY NOR FRONT WORKING LAMP LIGHT UP..................................................................................................................468 b) WORKING LAMP LIGHTS UP BUT MONITOR DISPLAY DOES NOT LIGHT UP.............................................................................................................468 c) MONITOR DISPLAY LIGHTS UP BUT FRONT WORKING LAMP DOES NOT LIGHT UP.......................................................................................................468 M-11 ABNORMALITY IN REAR WORKING LAMP...........................................................................................................................................470 a) NEITHER MONITOR DISPLAY NOR REAR WORKING LAMP LIGHT UP...................................................................................................................470 b) REAR WORKING LAMP LIGHTS UP BUT MONITOR DISPLAY DOES NOT LIGHT UP........................................................................................................470 c) MONITOR DISPLAY LIGHTS UP BUT REAR WORKING LAMP DOES NOT LIGHT UP........................................................................................................470 M-12 ABNORMALITY IN TRANSMISSION CUT-OFF........................................................................................................................................472 a) WHEN MONITOR SWITCH (TRANSMISSION CUT-OFF SWITCH ) IS PRESSED,CUT-OFF FUNCTION IS NOT SWITCHED AND DISPLAY DOES NOT CHANGE...............................................472 b) WHEN MONITOR SWITCH (TRANSMISSION CUT-OFF SWITCH )IS OFF,MONITOR DISPLAY GOES OUT BUT CUT-OFF FUNCTION IS ACTUATED WHEN PEDAL IS DEPRESSED...............................472 c) WHEN MONITOR DISPLAY IS TURNED OFF (TRANSMISSION CUT-OFF SWITCH TURNED OFF),CUT-OFF FUNCTION IS ALWAYS ACTUATED..........................................................472 d) CUT-OFF FUNCTION IS ALWAYS ACTUATED REGARDLESS OF MONITOR DISPLAY (TRANSMISSION CUT-OFF SWITCH ON OR OFF)................................................................472 e) MONITOR DISPLAY LIGHTS UP (TRANSMISSION CUT-OFF SWITCH TURNED ON),BUT CUT-OFF FUNCTION IS NOT ACTUATED...................................................................473 M-13 ABNORMALITY IN LOW IDLING SELECTION........................................................................................................................................474 a) WHEN MONITOR SWITCH (LOW IDLE SELECTOR SWITCH) IS TURNED ON,THE LOW IDLING SPEED DOES NOT RISE AND DISPLAY DOES NOT CHANGE...............................................474 b) WHEN THE MONITOR SWITCH (LOW IDLE SELECTOR SWITCH ) IS TURNED ON,THE MONITOR LIGHTS UP BUT THE LOW IDLING SPEED DOES NOT RISE............................................474 c) WHEN THE MONITOR SWITCH (LOW IDLE SELECTOR SWITCH ) IS TURNED OFF,THE MONITOR GOES OFF BUT THE LOW IDLING SPEED DOES NOT LOWER...........................................475 M-14 ABNORMALITY IN EMERGENCY STEERING NORMAL DISPLAY...........................................................................................................................476 M-15 ABNORMALITY IN EMERGENCY STEERING ACTUATION DISPLAY........................................................................................................................477 a) EMERGENCY STEERING ACTUATION DISPLAY DOES NOT LIGHT UP...................................................................................................................477 b) EMERGENCY STEERING ACTUATION DISPLAY STAYS LIGHTED UP....................................................................................................................477 M-16 ABNORMALITY IN PARKING BRAKE DRAGGING WARNING..............................................................................................................................478 a) WHEN PARKING BRAKE IS APPLIED,BUZZER SOUNDS (INTERMITTENTLY) AND CAUTION LAMP FLASHES EVEN WHEN DIRECTIONAL LEVER IS AT N................................................478 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...........................478 M-17 ABNORMALITY IN PARKING BRAKE DRAGGING WARNING (WHEN JOYSTICK STEERING MODE (IF EQUIPPED))..................................................................................480 a) WHEN PARKING BRAKE IS APPLIED,BUZZER SOUNDS (INTERMITTENTLY) AND CAUTION LAMP FLASHES EVEN WHEN DIRECTIONAL LEVER IS AT N................................................480 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...........................480 M-18 WHEN PARKING BRAKE DRAGGING WARNING IS GIVEN,BUZZER AND CAUTION LAMP ARE ACTUATED CONTINUOUSLY,OR THEY ARE NOT ACTUATED....................................................482 a) ACTUATED CONTINUOUSLY....................................................................................................................................................482 b) NOT ACTUATED.............................................................................................................................................................482 M-19 ABNORMALITY IN BUZZER......................................................................................................................................................483 a) BUZZER DOES NOT SOUND WHEN STARTING SWITCH IS AT ON (FOR 3 SECONDS) (DURING SELF-CHECK)..................................................................................483 b) BUZZER ALWAYS SOUNDS.....................................................................................................................................................483 M-20 CONDITION OF MONITOR SWITCHES IS NOT STORED IN MEMORY......................................................................................................................484 M-21 ABNORMALITY IN FAILURE DISPLAY MODE........................................................................................................................................485 a) DOES NOT ENTER FAILURE DISPLAY MODE......................................................................................................................................485 b) COUNT FOR TIME ELAPSED SINCE FAILURE IN FAILURE DISPLAY MODE DOES NOT ADVANCE............................................................................................485 M-22 BUZZER IS NOT MADE TO SOUND BY TRANSMISSION & JOYSTICK STEERING CONTROLLER.................................................................................................486 M-23 FAILURE CODE IS NOT SENT TO MAIN MONITOR(ABNORMALITY IN NETWORK)(IF EQUIPPED)..............................................................................................487 TROUBLESHOOTING OF MAINTENANCE MONITOR SYSTEM (K MODE)..............................................................................................................................489 ELECTRICAL CIRCUIT DIAGRAM FOR MAINTENANCE MONITOR SYSTEM.......................................................................................................................490 K-1 WHEN STARTING SWITCH IS TURNED ON,ALL LAMPS ON MAINTENANCE DO NOT LIGHT UP FOR 3 SECONDS,MAINTENANCE MONITOR DOES NOT WORK..................................................492 a) NO LAMPS ON MAINTENANCE MONITOR LIGHT UP.................................................................................................................................492 b) SOME LAMPS DO NOT LIGHT UP...............................................................................................................................................492 K-2 WHEN STARTING SWITCH IS TURNED ON,ALL LAMPS ON MAINTENANCE MONITOR LIGHT UP BUT DO NOT GO OUT (EVEN AFTER 3 SECONDS)........................................................493 K-3 WHEN ENGINE IS STARTED IMMEDIATELY AFTER STARTING SWITCH IS TURNED ON (WITHIN 3 SECONDS),NO LAMPS ON MAINTENANCE MONITOR GO OUT.............................................494 K-4 WHEN STARTING SWITCH IS TURNED ON (ENGINE STOPPED),CHECK ITEMS FLASH........................................................................................................496 a) ENGINE OIL LEVEL DISPLAY FLASHES.........................................................................................................................................496 b) ENGINE WATER LEVEL DISPLAY FLASHES.......................................................................................................................................497 K-5 WHEN STARTING SWITCH IS TURNED ON (ENGINE STARTED),CAUTION ITEMS FLASH......................................................................................................498 a) ENGINE OIL PRESSURE DISPLAY FLASHES (CHECK THAT THE ENGINE OIL PURESSURE IS CORRECT).....................................................................................498 b) BATTERY CHARGE LEVEL DISPLAY FLASHES.....................................................................................................................................499 c) BRAKE OIL PRESSURE DISPLAY FLASHES(CHECK THAT THE BRAKE OIL PRESSURE IS CORRECT).........................................................................................500 d) AIR CLEANER (R.H.) CLOGGING DISPLAY FLASHES(CHECK THAT THE AIR CLEANER(R.H)IS NOT CLOGGED.)..............................................................................502 e) AIR CLEANER (L.H.) CLOGGING DISPLAY FLASHES (CHECK THAT THE AIR CLEANER(L.H.)IS NOT CLOGGED).............................................................................503 f) TRANSMISSION OIL FILTER DISPLAY FLASHES(THE TRANSMISSION OIL FILTER MUST NOT BE CLOGGED).................................................................................504 K-6 CAUTION ITEMS ARE FLASHING BUT BUZZER DOES NOT SOUND........................................................................................................................505 K-7 THERE IS NO ABNORMALITY IN MONITOR DISPLAY BUT CAUTION BUZZER SOUNDS........................................................................................................506 K-8 CAUTION ITEMS ARE FLASHING BUT NEITHER CHECK LAMP NOR CAUTION LAMP FLASHES..................................................................................................507 a) CHECK LAMP...............................................................................................................................................................507 b) CAUTION LAMP.............................................................................................................................................................507 K-9 THERE IS NO ABNORMALITY IN MAINTENANCE MONITOR DISPLAY BUT CHECK LAMP OR CAUTION LAMP LIGHTS UP.............................................................................508 a) CHECK LAMP...............................................................................................................................................................508 b) CAUTION LAMP.............................................................................................................................................................508 K-10 ONLY NIGHT LIGHTING OF MAINTENANCE MONITOR DOES NOT LIGHT UP WHEN LIGHTING SWITCH IS TURNED ON.............................................................................509 K-11 NIGHT LIGHTING LIGHTS UP EVEN WHEN LIGHTING SWITCH IS TURNED OFF...........................................................................................................510 K-12 SERVICE METER DOES NOT WORK................................................................................................................................................511 K-13 SERVICE METER IS RUNNING EVEN WHEN ENGINE IS STOPPED.......................................................................................................................511 K-14 ABNORMALITY IN GAUGE DISPLAY...............................................................................................................................................513 a) ABNORMALITY IN FUEL GAUGE................................................................................................................................................513 b) ABNORMALITY IN ENGINE WATER TEMPERATURE GAUGE............................................................................................................................514 c) ABNORMALITY IN TORQUE CONVERTER OIL TEMPERATURE GAUGE....................................................................................................................515 TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE).......................................................................................................................................517 ELECTRICAL CIRCUIT DIAGRAM FOR POWER SUPPLY,ENGINE STARTING,ENGINE STOPPING AND PREHEATING......................................................................................518 ELECTRICAL CIRCUIT DIAGRAM FOR PARKING BRAKE....................................................................................................................................520 E-1 ENGINE DOES NOT START.......................................................................................................................................................522 a) STARTING MOTOR DOES NOT TURN.............................................................................................................................................522 b) STARTING MOTOR TURNS (STD SPEC.).........................................................................................................................................526 E-2 ENGINE DOES NOT STOP (STD SPEC.)............................................................................................................................................528 E-3 ENGINE STOPS WHEN MACHINE IS TRAVELING (STD SPEC.)..........................................................................................................................529 E-4 ABNORMALITY IN PREHEATING SYSTEM............................................................................................................................................531 a) DOES NOT CARRY OUT PREHEATING ...........................................................................................................................................531 b) ALWAYS CARRIES OUT PREHEATING FOR 45 SECONDS.............................................................................................................................532 c) PREHEATING STAYS ON......................................................................................................................................................532 d) PREHEATING TIME BECOMES SHORTER,OR THERE IS FLUCTUATION..................................................................................................................533 E-5 PARKING BRAKE DOES NOT HAVE EFFECT..........................................................................................................................................535 a) PARKING BRAKE HAS NO EFFECT WHEN PARKING BRAKE SWITCH IS TURNED ON.......................................................................................................535 b) PARKING BRAKE HAS NO EFFECT WHEN BRAKE PRESSURE (ACCUMULATOR PRESSURE) DROPS (DOES NOT WORK AS EMERGENCY BRAKE)..........................................................535 E-6 PARKING BRAKE IS APPLIED WHEN MACHINE IS TRAVELING..........................................................................................................................536 E-7 PARKING BRAKE IS RELEASED WHEN STARTING SWITCH IS TURNED ON.................................................................................................................538 E-8 TRANSMISSION DOES NOT CHANGE TO NEUTRAL WHEN PARKING BRAKE IS APPLIED (BUT PARKING BRAKE WORKS NORMALLY)....................................................................538 E-9 KICK-DOWN SWITCH DOES NOT WORK .............................................................................................................................................540 a) KICK-DOWN SWITCH DOES NOT WORK EVEN THOUGH GEAR SHIFT WORKS NORMALLY.....................................................................................................540 b) KICK-DOWN CANNOT BE CANCELED.............................................................................................................................................541 E-10 ABNORMALITY IN LIGHTING UP OF FRONT WORKING LAMP...........................................................................................................................542 E-11 ABNORMALITY IN LIGHTING UP OF REAR WORKING LAMP............................................................................................................................542 E-12 ABNORMALITY IN TRANSMISSION CUT-OFF........................................................................................................................................542 E-13 ABNORMALITY IN LOW IDLING SELECTION........................................................................................................................................542 E-14 ABNORMALITY IN PARKING BRAKE DRAGGING WARNING..............................................................................................................................542 E-15 ABNORMALITY IN BUZZER......................................................................................................................................................542 TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (H MODE).........................................................................................................................543 H-1 MACHINE DOES NOT MOVE.......................................................................................................................................................544 H-2 MACHINE LACKS POWER OR SPEED (EVERY SPEED RANGE)............................................................................................................................545 H-3 EXCESSIVE TIME LAG WHEN STARTING MACHINE OR SHIFTING GEAR...................................................................................................................546 H-4 TORQUE CONVERTER OIL TEMPERATURE IS HIGH....................................................................................................................................547 H-5 STEERING DOES NOT TURN .....................................................................................................................................................548 H-6 STEERING DOES NOT TURN[MACHINE WITH JOYSTICK(IF EQUIPPED)]..................................................................................................................549 H-7 TURNING,RESPONSE OF STEERING IS POOR .......................................................................................................................................550 H-8 TURNING,RESPONSE OF STEERING IS POOR[MACHINE WITH JOYSTICK(IF EQUIPPED)]....................................................................................................551 H-9 STEERING IS HEAVY...........................................................................................................................................................552 H-10 JOYSTICK LEVER IS HEAVY[MACHINE WITH JOYSTICK(IF EQUIPPED)]................................................................................................................552 H-11 STEERING WHEEL SHAKES OR JERKS.............................................................................................................................................553 H-12 STEERING WHEEL SHAKES OR JERKS[MACHINE WITH JOYSTICK(IF EQUIPPED)].........................................................................................................554 H-13 TURNING RADIUS IS DIFFERENT BETWEEN LEFT AND RIGHT AT MAXIMUM STEERING.....................................................................................................555 H-14 WHEEL BRAKES DO NOT WORK OR BRAKING EFFECT IS POOR.........................................................................................................................556 H-15 WHEEL BRAKES ARE NOT RELEASED OR BRAKES DRAG...............................................................................................................................557 H-16 BLADE DOES NOT RISE........................................................................................................................................................558 H-17 BLADE MOVES SLOWLY OR DOES NOT HAVE SUFFICIENT LIFTING POWER...............................................................................................................559 H-18 WHEN RAISING BLADE,BECOMES SLOW AT CERTAIN HEIGHT .........................................................................................................................560 H-19 LIFT CYLINDER CANNOT HOLD DOWN BLADE.......................................................................................................................................560 H-20 BLADE HAS LARGE AMOUNT OF HYDRAULIC DRIFT..................................................................................................................................560 H-21 BLADE FLUCTUATES WHILE WORKING.............................................................................................................................................561 H-22 BLADE DROPS MOMENTARILY WHEN LEVER IS OPERATED FROM HOLD TO RAISE..........................................................................................................561 H-23 BLADE DOES NOT TILT BACK...................................................................................................................................................562 H-24 BLADE MOVES SLOWLY OR HAS INSUFFICIENT TILT BACK POWER.....................................................................................................................563 H-25 BLADE MOVEMENT BECOMES SLOW DURING TILT BACK...............................................................................................................................564 H-26 LIFT CYLINDER CANNOT HOLD DOWN BUCKET......................................................................................................................................564 H-27 BLADE HAS LARGE AMOUNT OF HYDRAULIC DRIFT..................................................................................................................................564 H-28 BLADE CONTROL LEVER DOES NOT MOVE SMOOTHLY.................................................................................................................................565 TROUBLESHOOTING OF JOYSTICK STEERING CONTROL SYSTEM (J MODE)........................................................................................................................567 JUDGEMENT TABLE FOR JOYSTICK STEERING CONTROL SYSTEM RELATED PARTS..............................................................................................................568 ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE......................................................................................................570 ELECTRICAL CIRCUIT DIAGRAM FOR JOYSTICK STEERING CONTROL SYSTEM.................................................................................................................574 J-1 FAILURE CODE [56] (SHORT CIRCUIT,DISCONNECTION IN CAUTION RELAY OUTPUT) IS DISPLAYED........................................................................................576 J-2 FAILURE CODE [57] (SHORT CIRCUIT IN STEERING RIGHT SOLENOID (DETECTED WHEN SIGNAL IS OUTPUT)) IS DISPLAYED..................................................................577 J-3 FAILURE CODE [58] (SHORT CIRCUIT IN STEERING LEFT SOLENOID (DETECTED WHEN SIGNAL IS OUTPUT)) IS DISPLAYED...................................................................578 J-4 FAILURE CODE [59] (SHORT CIRCUIT IN STEERING RIGHT SOLENOID (POWER SUPPLY SIDE)) IS DISPLAYED...............................................................................579 J-5 FAILURE CODE [60] (SHORT CIRCUIT IN STEERING LEFT SOLENOID (POWER SUPPLY SIDE)) IS DISPLAYED................................................................................580 J-6 FAILURE CODE [61] (SHORT CIRCUIT,DISCONNECTION IN STEERING SOLENOID CUT RELAY OUTPUT) IS DISPLAYED..........................................................................582 J-7 FAILURE CODE [62] (SHORT CIRCUIT,DISCONNECTION IN JOYSTICK STEERING NEUTRAL CIRCUIT) IS DISPLAYED...........................................................................584 J-8 FAILURE CODE [63] (SHORT CIRCUIT,DISCONNECTION IN JOYSTICK STEERING LEVER POTENTIOMETER) IS DISPLAYED.......................................................................585 J-9 ABNORMALITY IN POWER SUPPLY,POWER SUPPLY VOLTAGE............................................................................................................................586 J-10 ABNORMALITY IN JOYSTICK STEERING ON-OFF CIRCUIT............................................................................................................................587 J-11 DISCONNECTION IN STEERING RIGHT SOLENOID...................................................................................................................................588 J-12 DISCONNECTION IN STEERING LEFT SOLENOID....................................................................................................................................589 30 DISASSEMBLY AND ASSEMBLY.................................................................................................................................................................591 METHOD OF USING MANUAL .................................................................................................................................................................593 PRECAUTIONS WHEN CARRYING OUT OPERATION.................................................................................................................................................595 SPECIAL TOOL LIST.......................................................................................................................................................................597 SKETCHES OF SPECIAL TOOLS...............................................................................................................................................................603 REMOVAL AND INSTALLATION OF STARTING MOTOR..............................................................................................................................................611 REMOVAL AND INSTALLATION OF ALTERNATOR..................................................................................................................................................612 REMOVAL AND INSTALLATION OF ENGINE OIL COOLER...........................................................................................................................................613 REMOVAL AND INSTALLATION OF FUEL INJECTION PUMP FOR LEFT BANK...........................................................................................................................614 REMOVAL AND INSTALLATION OF FUEL INJECTION PUMP FOR RIGHT BANK..........................................................................................................................615 REMOVAL AND INSTALLATION OF WATER PUMP..................................................................................................................................................616 REMOVAL AND INSTALLATION OF NOZZLE HOLDER...............................................................................................................................................617 REMOVAL AND INSTALLATION OF TURBOCHARGER................................................................................................................................................618 REMOVAL AND INSTALLATION OF ENGINE FRONT SEAL...........................................................................................................................................619 REMOVAL AND INSTALLATION OF ENGINE REAR SEAL............................................................................................................................................621 REMOVAL AND INSTALLATION OF CYLINDER HEAD...............................................................................................................................................623 REMOVAL AND INSTALLATION OF RADIATOR....................................................................................................................................................628 REMOVAL AND INSTALLATION OF ENGINE......................................................................................................................................................630 REMOVAL AND INSTALLATION OF DAMPER......................................................................................................................................................635 DISASSEMBLY AND ASSEMBLY OF DAMPER......................................................................................................................................................636 REMOVAL AND INSTALLATION OF TORQUE CONVERTER AND TRANSMISSION ASSEMBLY..................................................................................................................640 DISASSEMBLY AND ASSEMBLY OF TORQUE CONVERTER............................................................................................................................................647 DISASSEMBLY AND ASSEMBLY OF TORQUE CONVERTER VALVE......................................................................................................................................654 DISASSEMBLY AND ASSEMBLY OF TRANSMISSION................................................................................................................................................655 REMOVAL AND INSTALLATION OF TRANSMISSION VALVE..........................................................................................................................................679 DISASSEMBLY AND ASSEMBLY OF TRANSMISSION VALVE..........................................................................................................................................680 DISASSEMBLY AND ASSEMBLY OF TRANSFER....................................................................................................................................................684 DISASSEMBLY AND ASSEMBLY OF PTO.........................................................................................................................................................699 REMOVAL AND INSTALLATION OF CENTER SUPPORT..............................................................................................................................................704 DISASSEMBLY AND ASSEMBLY OF CENTER SOPPORT..............................................................................................................................................706 DISASSEMBLY AND ASSEMBLY OF DRIVE SHAFT.................................................................................................................................................710 REMOVAL AND INSTALLATION OF FRONT AXLE..................................................................................................................................................713 REMOVAL AND INSTALLATION OF REAR AXLE...................................................................................................................................................715 REMOVAL AND INSTALLATION OF DIFFERENTIAL................................................................................................................................................720 DISASSEMBLY AND ASSEMBLY OF DIFFERENTIAL................................................................................................................................................722 DISASSEMBLY AND ASSEMBLY OF FINAL DRIVE.................................................................................................................................................730 REMOVAL AND INSTALLATION OF ORBIT-ROLL..................................................................................................................................................737 REMOVAL AND INSTALLATION OF EMERGENCY STEERING PUMP.....................................................................................................................................739 REMOVAL AND INSTALLATION OF DIVERTER VALVE..............................................................................................................................................740 DISASSEMBLY AND ASSEMBLY OF DIVERTER VALVE..............................................................................................................................................741 REMOVAL AND INSTALLATION OF ACCUMULATOR CHARGE VALVE....................................................................................................................................743 DISASSEMBLY AND ASSEMBLY OF ACCUMULATOR CHARGE VALVE....................................................................................................................................744 REMOVAL AND INSTALLATION OF STEERING STOP VALVE.........................................................................................................................................746 REMOVAL AND INSTALLATION OF STEERING CYLINDER...........................................................................................................................................747 REMOVAL AND INSTALLATION OF STEERING VALVE..............................................................................................................................................749 REMOVAL AND INSTALLATION OF BRAKE VALVE.................................................................................................................................................751 REMOVAL AND INSTALLATION OF SLACK ADJUSTER..............................................................................................................................................752 DISASSEMBLY AND ASSEMBLY OF SLACK ADJUSTER..............................................................................................................................................753 REMOVAL AND INSTALLATION OF BRAKE.......................................................................................................................................................755 DISASSEMBLY AND ASSEMBLY OF BRAKE.......................................................................................................................................................756 REMOVAL AND INSTALLATION OF PARKING BRAKE CALIPERS......................................................................................................................................761 DISASSEMBLY AND ASSEMBLY OF PARKING BRAKE CALIPERS......................................................................................................................................762 REMOVAL AND INSTALLATION OF PARKING BRAKE PAD...........................................................................................................................................764 REMOVAL AND INSTALLATION OF PARKING BRAKE SPRING CYLINDER...............................................................................................................................765 REMOVAL AND INSTALLATION OF BRAKE OIL TANK..............................................................................................................................................766 REMOVAL AND INSTALLATION OF HYDRAULIC PUMP ASSEMBLY.....................................................................................................................................767 REMOVAL AND INSTALLATION OF SERVO CYLINDER..............................................................................................................................................772 REMOVAL AND INSTALLATION OF HYDRAULIC TANK AND FITER CASE ASSEMBLY......................................................................................................................773 REMOVAL AND INSTALLATION OF PPC VALVE...................................................................................................................................................775 DISASSEMBLY AND ASSEMBLY OF PPC VALVE...................................................................................................................................................777 REMOVAL AND INSTALLATION OF WORK EQUIPMENT CONTROL VALVE................................................................................................................................778 DISASSEMBLY AND ASSEMBLY OF WORK EQUIPMENT CONTROL VALVE................................................................................................................................780 REMOVAL AND INSTALLATION OF CAB.........................................................................................................................................................783 REMOVAL AND INSTALLATION OF FLOOR FRAME.................................................................................................................................................785 REMOVAL AND INSTALLATION OF CENTER HINGE PIN............................................................................................................................................788 REMOVAL AND INSTALLATION OF WORK EQUIPMENT..............................................................................................................................................800 REMOVAL AND INSTALLATION OF LIFT CYLINDER ASSEMBLY......................................................................................................................................803 REMOVAL AND INSTALLATION OF PITCH & TILT CYLINDER.......................................................................................................................................804 REMOVAL AND INSTALLATION OF AIR CONDITIONER UNIT........................................................................................................................................805 REMOVAL AND INSTALLATION OF AIR CONDITIONER COMPRESSOR..................................................................................................................................807 REMOVAL AND INSTALLATION OF RECEIVER TANK...............................................................................................................................................808 REMOVAL AND INSTALLATION OF AIR CONDITIONER CONDENSER...................................................................................................................................809 REMOVAL AND INSTALLATION OF TRANSMISSION AND STEERING CONTROLLER........................................................................................................................810 REMOVAL AND INSTALLATION OF MAIN MONITOR................................................................................................................................................811 REMOVAL AND INSTALLATION OF FUEL TANK...................................................................................................................................................813 REMOVAL AND INSTALLATION OF COUNTERWEIGHT...............................................................................................................................................815 REMOVAL AND INSTALLATION OF AJSS LEVER SWITCH ASSEMBLY..................................................................................................................................816 40 MAINTENANCE STANDRAD.....................................................................................................................................................................821 ENGINE MOUNT............................................................................................................................................................................822 TRANSMISSION MOUNT......................................................................................................................................................................823 DAMPER..................................................................................................................................................................................824 TORQUE CONVERTER CHARGING,PPC AND BRAKE PUMP............................................................................................................................................826 TORQUE CONVERTER ......................................................................................................................................................................828 TORQUE CONVERTER REGULATOR VALVE........................................................................................................................................................829 TRANSMISSION(1/2).......................................................................................................................................................................830 TRANSMISSION(2/2).......................................................................................................................................................................832 TRANSFER................................................................................................................................................................................834 TRANSMISSION CONTROL VALVE..............................................................................................................................................................836 DRIVE SHAFT.............................................................................................................................................................................841 CENTER SUPPORT..........................................................................................................................................................................842 DIFFERENTIAL(1/2).......................................................................................................................................................................843 DIFFERENTIAL(2/2).......................................................................................................................................................................844 FINAL DRIVE.............................................................................................................................................................................846 AXLE MOUNT..............................................................................................................................................................................848 CENTER HINGE PIN........................................................................................................................................................................850 STEERING COLUMN.........................................................................................................................................................................852 STEERING DEMAND VALVE...................................................................................................................................................................854 DIVERTER VALVE..........................................................................................................................................................................856 STEERING CYLINDER MOUNT.................................................................................................................................................................857 EMERGENCY STEERING PUMP.................................................................................................................................................................858 BRAKE VALVE.............................................................................................................................................................................860 SLACK ADJUSTER..........................................................................................................................................................................863 BRAKE...................................................................................................................................................................................864 PARKING BRAKE...........................................................................................................................................................................866 PPC VALVE...............................................................................................................................................................................868 PPC RELIEF VALVE........................................................................................................................................................................870 STEERING PUMP...........................................................................................................................................................................871 SWITCH PUMP.............................................................................................................................................................................872 MAIN PISTON PUMP........................................................................................................................................................................874 CONTROL PUMP............................................................................................................................................................................876 MAIN CONTROL VALVE......................................................................................................................................................................878 HYDRAULIC CYLINDER......................................................................................................................................................................882 WORK EQUIPMENT LINKAGE..................................................................................................................................................................886 BRAKE COOLING PUMP......................................................................................................................................................................891 90 OTHERS...................................................................................................................................................................................893 WORK EQUIPMENT HYDRAULIC CIRCUIT DIAGRAM(1/2)...........................................................................................................................................895 WORK EQUIPMENT HYDRAULIC CIRCUIT DIAGRAM(2/2)...........................................................................................................................................897 ELECTRIC CIRCUIT DIAGRAM (1/7)..........................................................................................................................................................899 ELECTRIC CIRCUIT DIAGRAM (2/7)..........................................................................................................................................................901 ELECTRIC CIRCUIT DIAGRAM (3/7)..........................................................................................................................................................903 ELECTRIC CIRCUIT DIAGRAM (4/7)..........................................................................................................................................................905 ELECTRIC CIRCUIT DIAGRAM (5/7)..........................................................................................................................................................907 ELECTRIC CIRCUIT DIAGRAM (6/7)..........................................................................................................................................................909 ELECTRIC CIRCUIT DIAGRAM (7/7)..........................................................................................................................................................911
S.S 26/12/24
