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Komatsu WA320-3 Avance Loader Wheel Loader Shop Manual 50001 and up – PDF DOWNLOAD
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Komatsu WA320-3 Avance Loader Wheel Loader Shop Manual
Book Code: SEBM006006
MACHINE MODEL SERIAL NUMBER
WA320-3 50001 and up
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Description
Komatsu WA320-3 Avance Loader Wheel Loader Shop Manual
FILE DETAILS:
Komatsu WA320-3 Avance Loader Wheel Loader Shop Manual
Brands: Komatsu
Equipment Type: Wheel Loader
Manuals Type: Shop Manual
Machine Model: WA320-3 Avance Loader
Serial Number: 50001 and up
Book Code: SEBM006006
Language: English
Pages: 845
File Format: Portable Document Format (PDF)
DESCRIPTION:
Komatsu WA320-3 Avance Loader Wheel Loader Shop Manual
FOREWORD:
- This shop manual has been prepared as an aid to improve the quality of repairs by giving the serviceman an accurate understanding of the product and by showing him the correct way to perform repairs and make judgements. Make sure you understand the contents of this manual and use it to full effect at every opportunity.
- This shop manual mainly contains the necessary technical information for operations performed in a service workshop.
- For ease of understanding, the manual is divided into chapters for each main group of components; these chapters are further divided into the following sections.
STRUCTURE AND FUNCTION:
This section explains the structure and function of each component. It serves not only to give an understanding of the structure, but also serves as reference material for troubleshooting.
TESTING AND ADJUSTING:
This section explains checks to be made before and after performing repairs, as well as adjustments to be made at completion of the checks and repairs. Troubleshooting charts correlating “Problems” to “Causes” are also included in this section.
DISASSEMBLY AND ASSEMBLY:
This section explains the order to be followed when removing, installing, disassembling or assembling each component, as well as precautions to be taken for these operations.
MAINTENANCE STANDARD:
This section gives the judgement standards when inspecting disassembled parts.
TABLE OF CONTENTS:
Komatsu WA320-3 Avance Loader Wheel Loader Shop Manual
COVER........................................................................................................................................................................... 1 CONTENTS........................................................................................................................................................................ 2 01 GENERAL...................................................................................................................................................................... 24 GENERAL ASSEMBLY DRAWING.................................................................................................................................................... 25 SPECIFICATIONS.............................................................................................................................................................. 27 WEIGHT TABLE................................................................................................................................................................ 30 LIST OF LUBRICANT AND WATER................................................................................................................................................. 32 10 STRUCTURE AND FUNCTION....................................................................................................................................................... 34 POWER TRAIN................................................................................................................................................................. 35 POWER TRAIN SYSTEM.......................................................................................................................................................... 36 TORQUE CONVERTER, TRANSMISSION PIPING....................................................................................................................................... 38 TRANSMISSION HYDRAULIC SYSTEM DIAGRAM....................................................................................................................................... 39 TRANSMISSION HYDRAULIC CIRCUIT DIAGRAM...................................................................................................................................... 40 TORQUE CONVERTER............................................................................................................................................................ 41 TORQUE CONVERTER OIL FILTER................................................................................................................................................. 43 TRANSMISSION................................................................................................................................................................ 44 TRANSMISSION CONTROL VALVE.................................................................................................................................................. 54 DRIVE SHAFT................................................................................................................................................................. 76 AXLE........................................................................................................................................................................ 77 DIFFERENTIAL................................................................................................................................................................ 81 FINAL DRIVE................................................................................................................................................................. 87 AXLE MOUNT, CENTER HINGE PIN................................................................................................................................................ 89 STEERING PIPING............................................................................................................................................................. 91 STEERING COLUMN............................................................................................................................................................. 92 PRIORITY VALVE.............................................................................................................................................................. 93 STEERING VALVE (ORBIT-ROLL)................................................................................................................................................. 98 CUSHION VALVE...............................................................................................................................................................106 2-WAY RESTRICTOR VALVE......................................................................................................................................................107 BRAKE PIPING................................................................................................................................................................108 BRAKE HYDRAULIC CIRCUIT DIAGRAM.............................................................................................................................................109 BRAKE VALVE.................................................................................................................................................................111 ACCUMULATOR CHARGE VALVE....................................................................................................................................................116 ACCUMULATOR (FOR BRAKE).....................................................................................................................................................122 BRAKE.......................................................................................................................................................................124 PARKING BRAKE CONTROL.......................................................................................................................................................129 PARKING BRAKE...............................................................................................................................................................130 PARKING BRAKE SOLENOID VALVE................................................................................................................................................131 PARKING BRAKE VALVE.........................................................................................................................................................132 PARKING BRAKE EMERGENCY RELEASE SOLENOID VALVE..............................................................................................................................133 HYDRAULIC PIPING............................................................................................................................................................134 WORK EQUIPMENT HYDRAULIC SYSTEM DIAGRAM.....................................................................................................................................135 WORK EQUIPMENT HYDRAULIC CIRCUIT DIAGRAM....................................................................................................................................136 WORK EQUIPMENT LEVER LINKAGE................................................................................................................................................140 HYDRAULIC TANK..............................................................................................................................................................141 PPC VALVE...................................................................................................................................................................143 PPC RELIEF VALVE............................................................................................................................................................148 ACCUMULATOR (FOR PPC VALVE).................................................................................................................................................149 MAIN CONTROL VALVE..........................................................................................................................................................150 WORK EQUIPMENT LINKAGE......................................................................................................................................................165 BUCKET......................................................................................................................................................................167 BUCKET POSITIONER AND BOOM KICK-OUT.........................................................................................................................................168 CAB.........................................................................................................................................................................174 ROPS CAB....................................................................................................................................................................176 AIR CONDITIONER.............................................................................................................................................................177 ELECTRIC CIRCUIT DIAGRAM ...................................................................................................................................................178 MACHINE MONITOR SYSTEM......................................................................................................................................................193 MAIN MONITOR................................................................................................................................................................194 MAINTENANCE MONITOR.........................................................................................................................................................199 TRANSMISSION AUTO-SHIFT CONTROL SYSTEM......................................................................................................................................202 WORK EQUIPMENT CONTROL SYSTEM...............................................................................................................................................210 E.C.S.S.(ELECTRONICALLY CONTROLLED SUSPENSION SYSTEM).......................................................................................................................217 SENSORS.....................................................................................................................................................................221 ENGINE STARTING CIRCUIT.....................................................................................................................................................225 ENGINE STOP CIRCUIT.........................................................................................................................................................226 PREHEATING CIRCUIT..........................................................................................................................................................227 ELECTRIC TRANSMISSION CONTROL...............................................................................................................................................228 KICK-DOWN, HOLD SWITCH......................................................................................................................................................231 KICK-DOWN ELECTRIC CIRCUIT DIAGRAM..........................................................................................................................................232 TRANSMISSION CUT-OFF SWITCH.................................................................................................................................................241 TRANSMISSION CUT-OFF FUNCTION...............................................................................................................................................242 ELECTRIC PARKING BRAKE CONTROL .............................................................................................................................................246 20 TESTING AND ADJUSTING .......................................................................................................................................................259 STANDARD VALUE TABLE FOR ENGINE.............................................................................................................................................260 STANDARD VALUE TABLE FOR CHASSIS............................................................................................................................................261 STANDARD VALUE TABLE FOR ELECTRICAL SYSTEM..................................................................................................................................265 TOOLS FOR TESTING, ADJUSTING, AND TROUBLESHOOTING...........................................................................................................................269 ADJUSTING VALVE CLEARANCE...................................................................................................................................................270 MEASURING COMPRESSION PRESSURE..............................................................................................................................................271 MEASURING BLOW-BY PRESSURE..................................................................................................................................................272 TESTING AND ADJUSTING FUEL INJECTION TIMING.................................................................................................................................273 MEASURING EXHAUST COLOR.....................................................................................................................................................275 MEASURING INTAKE AIR PRESSURE (BOOST PRESSURE)..............................................................................................................................276 MEASURING EXHAUST GAS TEMPERATURE...........................................................................................................................................277 MEASURING ENGINE OIL PRESSURE...............................................................................................................................................278 MEASURING ENGINE SPEED......................................................................................................................................................279 TESTING AND ADJUSTING FAN BELT TENSION......................................................................................................................................280 METHOD FOR ADJUSTING ENGINE STOP MOTOR CABLE................................................................................................................................281 MEASURING ACCELERATOR PEDAL.................................................................................................................................................283 MEASURING OPERATING FORCE, TRAVEL OF SPEED LEVER............................................................................................................................285 MEASURING STALL SPEED.......................................................................................................................................................286 MEASURING TORQUE CONVERTER, TRANSMISSION,PARKING BRAKE OIL PRESSURE.........................................................................................................288 METHOD OF OPERATING EMERGENCY MANUAL SPOOL..................................................................................................................................290 MEASURING CLEARANCE BETWEEN TIRE AND WHEEL .................................................................................................................................292 TESTING AND ADJUSTING STEERING WHEEL .......................................................................................................................................293 MEASURING STEERING OIL PRESSURE.............................................................................................................................................295 MEASURING OPERATING FORCE, TRAVEL OF BRAKE PEDAL ...........................................................................................................................297 MEASURING BRAKE PERFORMANCE.................................................................................................................................................298 TESTING BRAKE OIL PRESSURE..................................................................................................................................................299 TESTING FOR BRAKE DISC WEAR.................................................................................................................................................300 BLEEDING AIR FROM BRAKE SYSTEM..............................................................................................................................................301 MEASURING PARKING BRAKE PERFORMANCE.........................................................................................................................................302 MANUAL RELEASE METHOD FOR PARKING BRAKE.....................................................................................................................................303 TESTING WEAR OF PARKING BRAKE DISC..........................................................................................................................................304 TESTING AND ADJUSTING ACCUMULATOR CHARGE PRESSURE...........................................................................................................................305 MEASURING WORK EQUIPMENT CONTROL LEVER......................................................................................................................................306 MEASURING WORK EQUIPMENT HYDRAULIC PRESSURE.................................................................................................................................308 MEASURING PPC VALVE PRESSURE................................................................................................................................................310 MEASURING WORK EQUIPMENT ...................................................................................................................................................312 TESTING AND ADJUSTING BUCKET POSITIONER.....................................................................................................................................314 TESTING AND ADJUSTING BOOM KICK-OUT.........................................................................................................................................315 ADJUSTING MAIN MONITOR (SPEEDOMETER MODULE).................................................................................................................................317 ADJUSTING BOOM, BUCKET ANGLE POTENTIOMETER..................................................................................................................................318 TROUBLESHOOTING.............................................................................................................................................................319 POINTS TO REMEMBER WHEN TROUBLESHOOTING.................................................................................................................................320 SEQUENCE OF EVENTS IN TROUBLESHOOTING...................................................................................................................................321 PRECAUTIONS WHEN CARRYING OUT MAINTENANCE...............................................................................................................................322 HANDLING CONNECTORS.....................................................................................................................................................329 CHECKS BEFORE TROUBLESHOOTING...........................................................................................................................................330 METHOD OF USING TROUBLESHOOTING CHARTS..................................................................................................................................331 CONNECTOR TYPES AND MOUNTING LOCATIONS..................................................................................................................................339 CONNECTOR PIN ARRANGEMENT DIAGRAM.......................................................................................................................................340 CONNECTION TABLE FOR CONNECTOR PIN NUMBERS..............................................................................................................................345 TROUBLESHOOTING OF ENGINE SYSTEM (S MODE)...............................................................................................................................352 S-1 STARTING PERFORMANCE IS POOR (STARTING ALWAYS TAKES TIME).......................................................................................................353 S-2 ENGINE DOES NOT START ..........................................................................................................................................354 (1) ENGINE DOES NOT TURN........................................................................................................................................354 (2) ENGINE TURNS BUT NO EXHAUST GAS COMES OUT (FUEL IS NOT BEING INJECTED)......................................................................................355 (3) EXHAUST GAS COMES OUT BUT ENGINE DOES NOT START (FUEL IS BEING INJECTED)....................................................................................356 S-3 ENGINE DOES NOT PICK UP SMOOTHLY (FOLLOW-UP IS POOR)............................................................................................................357 S-4 ENGINE STOPS DURING OPERATIONS..................................................................................................................................358 S-5 ENGINE DOES NOT ROTATE SMOOTHLY (HUNTING).......................................................................................................................359 S-6 ENGINE LACKS OUTPUT (NO POWER)..................................................................................................................................360 S-7 EXHAUST GAS IS BLACK (INCOMPLETE COMBUSTION)....................................................................................................................361 S-8 OIL CONSUMPTION IS EXCESSIVE (OR EXHAUST GAS IS BLUE)...........................................................................................................362 S-9 OIL BECOMES CONTAMINATED QUICKLY................................................................................................................................363 S-10 FUEL CONSUMPTION IS EXCESSIVE..................................................................................................................................364 S-11 OIL IS IN COOLING WATER, OR WATER SPURTS BACK, OR WATER LEVEL GOES DOWN........................................................................................365 S-12 OIL PRESSURE LAMP LIGHTS UP (DROP IN OIL PRESSURE).............................................................................................................366 S-13 OIL LEVEL RISES................................................................................................................................................367 S-14 WATER TEMPERATURE BECOMES TOO HIGH (OVERHEATING)...............................................................................................................368 S-15 ABNORMAL NOISE IS MADE.........................................................................................................................................369 S-16 VIBRATION IS EXCESSIVE.........................................................................................................................................370 TROUBLESHOOTING OF MAIN MONITOR SYSTEM (M MODE).........................................................................................................................371 TROUBLE DATA DISPLAY................................................................................................................................................373 M-1 MAIN MONITOR DOES NOT WORK......................................................................................................................................375 M-2 WHEN STARTING SWITCH IS TURNED ON AND ENGINE IS STARTED IMMEDIATELY, ALL LAMPS STAY LIGHTED UP..................................................................376 M-3 SPEEDOMETER DISPLAY DOES NOT WORK PROPERLY......................................................................................................................377 M-4 ABNORMALITY IN SHIFT INDICATOR..................................................................................................................................378 (a) STAYS AT N EVEN WHEN DIRECTIONAL LEVER IS AT F..............................................................................................................378 (b) STAYS AT N EVEN WHEN DIRECTIONAL LEVER IS AT R..............................................................................................................378 (c) DOES NOT DISPLAY N EVEN WHEN DIRECTIONAL LEVER IS AT N AND DISPLAYS R WHEN DIRECTIONAL LEVER IS AT F........................................................378 (d) DOES NOT DISPLAY N EVEN WHEN DIRECTIONAL LEVER IS AT N AND DISPLAYS F WHEN DIRECTIONAL LEVER IS AT R .......................................................379 (e) DOES NOT DISPLAY 1ST, 4TH...................................................................................................................................379 (f) DOES NOT DISPLAY 3RD, 4TH...................................................................................................................................379 (g) DOES NOT DISPLAY 2ND, 3RD...................................................................................................................................380 (h) DOES NOT DISPLAY 1ST, 2ND...................................................................................................................................380 M-5 HIGH BEAM DOES NOT LIGHT UP.....................................................................................................................................381 M-6 TURN SIGNAL DISPLAY DOES NOT LIGHT UP...........................................................................................................................382 (a) L.H. TURN SIGNAL DOES NOT LIGHT UP..........................................................................................................................382 (b) R.H. TURN SIGNAL DOES NOT LIGHT UP..........................................................................................................................382 M-7 ABNORMALITY IN PARKING DISPLAY..................................................................................................................................383 (a) PARKING LAMP DOES NOT LIGHT UP..............................................................................................................................383 (b) PARKING LAMP STAYS LIGHTED UP...............................................................................................................................383 M-8 ABNORMALITY IN PREHEATING SYSTEM (QGS)..........................................................................................................................384 (a) DOES NOT CARRY OUT PREHEATING ..............................................................................................................................384 (b) ALWAYS CARRIES OUT PREHEATING FOR 1 MINUTE..................................................................................................................385 (c) PREHEATING STAYS ON ........................................................................................................................................385 (d) PREHEATING TIME BECOMES SHORTER, OR THERE IS VARIATION......................................................................................................386 M-9 NIGHT LIGHTING DOES NOT LIGHT UP................................................................................................................................387 M-10 ABNORMALITY IN FRONT WORKING LAMP..............................................................................................................................388 (a) NEITHER MONITOR DISPLAY NOR FRONT WORKING LAMP LIGHT UP.....................................................................................................388 (b) WORKING LAMP LIGHTS UP BUT MONITOR DISPLAY DOES NOT LIGHT UP................................................................................................388 (c) MONITOR LIGHTS UP BUT WORKING LAMP DOES NOT LIGHT UP........................................................................................................388 M-11 ABNORMALITY IN REAR WORKING LAMP...............................................................................................................................389 (a) NEITHER MONITOR DISPLAY NOR REAR WORKING LAMP LIGHT UP......................................................................................................389 (b) WORKING LAMP LIGHTS UP BUT MONITOR DISPLAY DOES NOT LIGHT UP................................................................................................389 (c) MONITOR LIGHTS UP BUT WORKING LAMP DOES NOT LIGHT UP........................................................................................................389 M-12 ABNORMALITY IN TRANSMISSION CUT-OFF............................................................................................................................391 (a) WHEN MONITOR SWITCH IS PRESSED, CUT-OFF FUNCTION IS NOT SWITCHED AND DISPLAY IS NOT GIVEN ..................................................................391 (b) MONITOR DISPLAY GOES OUT BUT CUT-OFF FUNCTION STAYS ON .....................................................................................................391 (c) MONITOR DISPLAY LIGHTS UP BUT CUT-OFF FUNCTION IS NOT ACTUATED..............................................................................................392 M-13 ABNORMALITY IN PARKING BRAKE DRAGGING WARNING .................................................................................................................393 (a) WHEN PARKING BRAKE IS APPLIED, BUZZER SOUNDS (INTERMITTENTLY) EVEN WHEN DIRECTIONAL LEVER IS AT N, AND CAUTION LAMP FLASHES.................................393 (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.............393 M-14 WHEN PARKING BRAKE DRAGGING WARNING IS GIVEN, BUZZER AND CAUTION LAMP ARE ACTUATED CONTINUOUSLY, OR THEY ARE NOT ACTUATED .....................................394 (a) ACTUATED CONTINUOUSLY.......................................................................................................................................394 (b) NOT ACTUATED................................................................................................................................................394 M-15 ABNORMALITY IN BUZZER .........................................................................................................................................395 (a) BUZZER DOES NOT SOUND WHEN STARTING SWITCH IS TURNED ON (DURING SELF-CHECK).................................................................................395 (b) BUZZER ALWAYS SOUNDS........................................................................................................................................395 M-16 CONDITION OF MONITOR SWITCHES IS NOT STORED IN MEMORY..........................................................................................................396 M-17 ABNORMALITY IN FAILURE DISPLAY MODE............................................................................................................................397 (a) DOES NOT ENTER FAILURE DISPLAY MODE ........................................................................................................................397 (b) TIMES FOR TIME ELAPSED SINCE FAILURE ON FAILURE DISPLAY MODE DOES NOT ADVANCE ..............................................................................397 M-18 ABNORMALITY IN EMERGENCY STEERING NORMAL DISPLAY...............................................................................................................398 (a) EMERGENCY STEERING NORMAL DISPLAY DOES NOT LIGHT UP.........................................................................................................398 (b) EMERGENCY STEERING NORMAL DISPLAY LIGHTED UP................................................................................................................398 M-19 ABNORMALITY IN EMERGENCY STEERING ACTUATION DISPLAY............................................................................................................399 (a) EMERGENCY STEERING ACTUATION DISPLAY DOES NOT LIGHT UP......................................................................................................399 (b) EMERGENCY STEERING ACTUATION DISPLAY STAYS LIGHTED UP.......................................................................................................399 M-20 ABNORMALITY IN AUTO-GREASING SYSTEM............................................................................................................................400 (a) FORCED GREASING CANNOT BE CARRIED OUT.......................................................................................................................400 (b) MONITOR DISPLAY FLASHES RAPIDLY (2 TIMES/SEC)...............................................................................................................400 (c) WHEN NO MORE GREASE REMAINS, MONITOR DISPLAY FLASHES RAPIDLY (2 TIMES/SEC)..................................................................................400 (d) MONITOR DISPLAY FLASHES SLOWLY (1 TIME/SEC).................................................................................................................401 (e) MONITOR DISPLAY GOES OUT ...................................................................................................................................401 M-21 ABNORMALITY IN ECSS SYSTEM.....................................................................................................................................402 (a) DISPLAY DOES NOT CHANGE WHEN SWITCH IS PRESSED..............................................................................................................402 (b) MONITOR DISPLAY LIGHTS UP BUT ECSS FUNCTION DOES NOT WORK...................................................................................................402 M-22 BUZZER DOES NOT SOUND WHEN AUTO-LEVELING SWITCH IS ACTUATED....................................................................................................402 M-23 FAILURE CODE IS NOT SENT TO MAIN MONITOR (ABNORMALITY IN NETWORK)..............................................................................................403 TROUBLESHOOTING OF MAINTENANCE MONITOR SYSTEM (K MODE)..................................................................................................................404 K-1 WHEN STARTING SWITCH IS TURNED ON, ALL LAMPS ON MAINTENANCE MONITOR DO NOT LIGHT UP FOR 3 SECONDS, MAINTENANCE MONITOR DOES NOT WORK............................405 (a) ALL LAMPS ON MAINTENANCE MONITOR DO NOT LIGHT UP FOR 3 SECONDS..............................................................................................405 (b) SOME LAMPS DO NOT LIGHT UP..................................................................................................................................406 K-2 WHEN STARTING SWITCH IS TURNED ON, ALL LAMPS ON MAINTENANCE MONITOR LIGHT UP BUT DO NOT GO OUT..................................................................406 K-3 WHEN ENGINE IS STARTED IMMEDIATELY AFTER STARTING SWITCH IS TURNED ON (WITHIN 3 SECONDS), ALL LAMPS ON MAINTENANCE MONITOR DO NOT GO OUT........................407 K-4 WHEN STARTING SWITCH IS TURNED ON (ENGINE STOPPED), CHECK ITEMS FLASH...........................................................................................408 (a) ENGINE OIL LEVEL DISPLAY FLASHES............................................................................................................................408 (b) ENGINE WATER LEVEL DISPLAY FLASHES .........................................................................................................................409 K-5 WHEN STARTING SWITCH IS TURNED ON (ENGINE STARTED), CAUTION ITEMS FLASH.........................................................................................410 (a) ENGINE OIL PRESSURE DISPLAY FLASHES.........................................................................................................................410 (b) BATTERY CHARGE LEVEL DISPLAY FLASHES........................................................................................................................411 (c) BRAKE OIL PRESSURE DISPLAY FLASHES..........................................................................................................................412 (d) AIR CLEANER DISPLAY FLASHES.................................................................................................................................413 K-6 CAUTION ITEMS ARE FLASHING BUT ALARM BUZZER DOES NOT SOUND......................................................................................................414 K-7 THERE IS NO ABNORMALITY IN MONITOR DISPLAY BUT ALARM BUZZER SOUNDS..............................................................................................415 K-8 CAUTION ITEMS ARE FLASHING BUT WARNING LAMP (CHECK LAMP, CAUTION LAMP) DOES NOT LIGHT UP........................................................................416 (a) CHECK LAMP..................................................................................................................................................416 (b) CAUTION LAMP................................................................................................................................................416 K-9 THERE IS NO ABNORMALITY IN MAINTENANCE MONITOR DISPLAY BUT WARNING LAMP (CHECK LAMP, CAUTION LAMP) LIGHTS UP....................................................417 (a) CHECK LAMP..................................................................................................................................................417 (b) CAUTION LAMP................................................................................................................................................417 K-10 NIGHT LIGHTING DOES NOT LIGHT UP WHEN LAMP SWITCH IS TURNED ON (ONLY LIGHTING OF MAINTENANCE MONITOR DOES NOT LIGHT UP)........................................418 K-11 NIGHT LIGHTING LIGHTS UP EVEN WHEN LAMP SWITCH IS OFF, NIGHT LIGHTING STAYS LIGHTED UP.........................................................................419 K-12 SERVICE METER DOES NOT WORK....................................................................................................................................420 K-13 SERVICE METER IS RUNNING EVEN WHEN ENGINE IS STOPPED...........................................................................................................420 K-14 ABNORMALITY IN GAUGE ITEMS ....................................................................................................................................421 (a) ABNORMALITY IN FUEL GAUGE...................................................................................................................................421 (b) ABNORMALITY IN ENGINE WATER TEMPERATURE GAUGE...............................................................................................................422 (c) ABNORMALITY IN TORQUE CONVERTER OIL TEMPERATURE GAUGE.......................................................................................................423 TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE)...........................................................................................................................424 E-1 ENGINE DOES NOT START ..........................................................................................................................................425 (a) STARTING MOTOR DOES NOT TURN ...............................................................................................................................425 (b) STARTING MOTOR TURNS........................................................................................................................................429 E-2 ENGINE DOES NOT STOP............................................................................................................................................431 E-3 ENGINE STOPS WHEN MACHINE IS TRAVELING .........................................................................................................................431 E-4 PARKING BRAKE DOES NOT WORK ....................................................................................................................................432 (a) PARKING BRAKE HAS NO EFFECT WHEN PARKING BRAKE SWITCH IS TURNED ON (PARKING)................................................................................432 (b) PARKING BRAKE HAS NO EFFECT WHEN BRAKE PRESSURE DROPS (DOES NOT WORK AS EMERGENCY BRAKE)....................................................................432 E-5 PARKING BRAKE IS APPLIED WHEN MACHINE IS TRAVELING .............................................................................................................433 E-6 PARKING BRAKE IS RELEASED WHEN STARTING SWITCH IS TURNED ON ....................................................................................................435 E-7 TRANSMISSION DOES NOT CHANGE TO NEUTRAL WHEN PARKING BRAKE IS APPLIED (WITHOUT AUTO-SIFT TRANSMISSION)..........................................................435 E-8 TRANSMISSION DOES NOT WORK NORMALLY (WITHOUT AUTO-SIFT TRANSMISSION)............................................................................................436 (a) PROBLEM IN COMMON CIRCUIT FOR TRANSMISSION (ALWAYS STAYS IN 2ND)............................................................................................438 (b) PROBLEM IN H-L CIRCUIT......................................................................................................................................438 (c) PROBLEM IN SPEED CIRCUIT ...................................................................................................................................439 (d) PROBLEM IN 4TH CIRCUIT (DOES NOT ENTER 4TH).................................................................................................................439 (e) CONTACT IN H-L CIRCUIT......................................................................................................................................440 (f) CONTACT IN SPEED CIRCUIT....................................................................................................................................442 (g) CONTACT IN 4TH CIRCUIT (ALWAYS STAYS IN 4TH)................................................................................................................444 (h) PROBLEM IN FORWARD CIRCUIT (REVERSE IS NORMAL)..............................................................................................................445 (i) PROBLEM IN REVERSE CIRCUIT (FORWARD IS NORMAL)..............................................................................................................447 (j) PROBLEM IN COMMON CIRCUIT FOR FORWARD AND REVERSE (DOES NOT TRAVEL FORWARD, PARKING BRAKE IS NORMAL)........................................................449 (k) CONTACT IN FORWARD CIRCUIT..................................................................................................................................451 (l) CONTACT IN REVERSE CIRCUIT .................................................................................................................................453 (m) PROBLEM IN COMMON CIRCUIT FOR FORWARD AND REVERSE...........................................................................................................455 E-9 KICK-DOWN SWITCH DOES NOT WORK (WITHOUT AUTO-SIFT TRANSMISSION) (THE REGULAR F1 TO F4 SHIFTS NORMALLY)..........................................................456 E-10 KICK-DOWN WORKS ONLY WHEN KICK-DOWN SWITCH IS ON (KICK-DOWN SWITCH RELAY DOES NOT HOLD IN POSITION (SELF-HOLDING FUNCTION))(WITHOUT AUTO-SIFT TRANSMISSION)....458 E-11 KICK-DOWN OPERATION CANNOT BE CANCELED (WITHOUT AUTO-SIFT TRANSMISSION)........................................................................................458 (a) NOT CANCELED EVEN WHEN DIRECTIONAL LEVER IS MOVED FROM F TO N OR R .........................................................................................458 (b) NOT CANCELED EVEN WHEN SPEED LEVER IS MOVED FROM 2ND TO OTHER POSITION (BECOMES 4TH)........................................................................459 E-12 KICK-DOWN SWITCH IS ACTUATED BY MISTAKE WHEN TRAVELING IN 2ND (WITHOUT AUTO-SIFT TRANSMISSION).................................................................461 TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (CHASSIS RELATED)(T MODE)............................................................................................462 POWER TRAIN ........................................................................................................................................................463 T-1 MACHINE DOES NOT START......................................................................................................................................463 T-2 TRAVEL SPEED IS SLOW, THRUSTING POWER IS WEAK, LACKS POWER ON SLOPES .......................................................................................465 T-3 EXCESSIVE SHOCK WHEN STARTING MACHINE OR SHIFTING GEAR......................................................................................................467 T-4 EXCESSIVE TIME LAG WHEN STARTING MACHINE OR SHIFTING GEAR...................................................................................................468 T-5 TORQUE CONVERTER OIL TEMPERATURE IS HIGH....................................................................................................................469 STEERING SYSTEM.....................................................................................................................................................470 T-6 STEERING WHEEL DOES NOT TURN ...............................................................................................................................470 T-7 STEERING IS HEAVY...........................................................................................................................................471 T-8 STEERING WHEEL SHAKES OR THERE IS EXCESSIVE SHOCK...........................................................................................................472 BRAKE SYSTEM........................................................................................................................................................473 T-9 BRAKE DO NOT WORK OR BRAKING EFFECT IS POOR.................................................................................................................473 T-10 BRAKES ARE NOT RELEASED OR BRAKES DRAG.....................................................................................................................474 T-11 PARKING BRAKE IS NOT RELEASED OR BRAKE DRAGS...............................................................................................................475 WORK EQUIPMENT .....................................................................................................................................................476 T-12 BOOM DOES NOT RISE.........................................................................................................................................476 T-13 BOOM MOVEMENT IS SLOW OR BOOM LACKS LIFTING POWER..........................................................................................................477 T-14 WHEN BOOM IS RAISED, IT MOVES SLOWLY AT A CERTAIN HEIGHT ..................................................................................................478 T-15 BUCKET CANNOT BE PUSHED WITH BOOM CYLINDER (BUCKET FLOATS).................................................................................................478 T-16 EXCESSIVE HYDRAULIC DRIFT OF BOOM..........................................................................................................................478 T-17 BOOM SHAKES DURING OPERATION...............................................................................................................................478 T-18 BOOM DROPS MOMENTARILY WHEN CONTROL LEVER IS OPERATED FROM HOLD TO RAISE...................................................................................479 T-19 BUCKET DOES NOT TILT BACK..................................................................................................................................480 T-20 BUCKET MOVEMENT IS SLOW OR TILT-BACK LACKS POWER...........................................................................................................481 T-21 BUCKET MOVEMENT BECOMES SLOW DURING TILT-BACK OPERATION ...................................................................................................482 T-22 BUCKET CANNOT BE PUSHED WITH BUCKET CYLINDER ..............................................................................................................482 T-23 EXCESSIVE HYDRAULIC DRIFT OF BUCKET........................................................................................................................482 T-24 BUCKET SHAKES DURING LOADING OPERATION (MAIN CONTROL VALVE AT HOLD)........................................................................................483 T-25 BUCKET DUMPS MOMENTARILY WHEN CONTROL LEVER IS OPERATED FROM HOLD TO TILT..................................................................................483 T-26 BOOM, BUCKET CONTROL LEVERS ARE HEAVY OR DO NOT MOVE SMOOTHLY .............................................................................................484 TROUBLESHOOTING OF ECSS (ELECTRONICALLY CONTROLLED SUSPENSION SYSTEM)(D MODE)...........................................................................................485 JUDGEMENT TABLE FOR CONTROLLER ELECTRICAL SYSTEM)...................................................................................................................486 D-1 ECSS DOES NOT WORK..............................................................................................................................................487 (a) ERROR CODE [d0] IS DISPLAYED ...............................................................................................................................488 (b) ERROR CODE [d1] IS DISPLAYED ...............................................................................................................................488 (c) ERROR CODE [d2] IS DISPLAYED ...............................................................................................................................489 (d) ERROR CODE [d3] IS DISPLAYED ...............................................................................................................................489 (e) ERROR CODE [d4] IS DISPLAYED ...............................................................................................................................490 (f) NO ABNORMALITY DISPLAY IS GIVEN.............................................................................................................................490 D-2 ECSS CANNOT BE CANCELED.........................................................................................................................................494 D-3 OUTPUT IS TURNED ON (TRAVEL SPEED DOES NOT BECOME 5 KM/H)(DEVIATES AROUND 5 KM/H)...............................................................................495 D-4 OUTPUT IS TURNED ON WHEN TRANSMISSION IS IN 1ST ................................................................................................................495 D-5 OUTPUT IS TURNED ON WHEN TRANSMISSION IS IN 4TH.................................................................................................................496 D-6 CONTROLLER LED CODE IS NOT DISPLAYED ...........................................................................................................................497 D-7 ECSS IS ABNORMAL BUT MAIN MONITOR DOES NOT GIVE ABNORMALITY DISPLAY.............................................................................................497 TROUBLESHOOTING OF WORK EQUIPMENT CONTROLLER SYSTEM (W MODE)............................................................................................................498 OUTLINE.............................................................................................................................................................500 1. FUNCTION.....................................................................................................................................................500 2. WHEN CARRYING OUT TROUBLESHOOTING ...........................................................................................................................500 3. FAILURE CODE TABLE...........................................................................................................................................500 4. TABEL OF TROUBLESHOOTING MODES AND CAUSES....................................................................................................................501 W-1 FAILURE CODE [40] ABNORMALITY IN BUCKET DUMP SOLENOID SYSTEM....................................................................................................503 W-2 FAILURE CODE [41] SHORT CIRCUIT IN POWER SOURCE WHEN BUCKET DUMP, TILT SOLENOIDS ARE OFF........................................................................504 W-3 FAILURE CODE [42] ABNORMALITY IN BUCKET TILT SOLENOID SYSTEM....................................................................................................505 W-4 FAILURE CODE [43] ABNORMALITY IN DAMPING SOLENOID SYSTEM........................................................................................................506 W-5 FAILURE CODE [44] SHORT CIRCUIT IN POWER SOURCE AT HOT END OF DAMPING SOLENOID .................................................................................507 W-6 FAILURE CODE [45] SHORT CIRCUIT IN POWER SOURCE AT RETURN END OF DAMPING SOLENOID...............................................................................507 W-7 FAILURE CODE [48] ANMORMALITY IN BUCKET LEVER KICK-OUT RELAY SYSTEM.............................................................................................508 W-8 FAILURE CODE [49] ABNORMALITY IN BOOM LEVER KICK-OUT RELAY SYSTEM...............................................................................................510 W-9 FAILURE CODE [50] ABNORMALITY IN AUTO-LEVELER RELAY SYSTEM......................................................................................................511 W-10 FAILURE CODE [51] DISCONNECTION IN BOOM RAISE, LOWER DETECTION PRESSURE SWITCH.................................................................................512 W-11 FAILURE CODE [52] ABNORMALITY IN BOOM ANGLE POTENTIONMETER SYSTEM..............................................................................................513 W-12 FAILURE CODE [53] ABNORMALITY IN BUCKET ANGLE POTENTIOMETER SYSTEM.............................................................................................513 W-13 FAILURE CODE [54] ABNORMALITY IN MODEL SELECTION WIRING HARNESS................................................................................................515 W-14 SENSOR CANNOT BE ADJUSTED......................................................................................................................................516 W-15 DOES NOT CARRY OUT AUTO-LEVELING...............................................................................................................................517 (a) AUTO-LEVELER SWITCH SYSTEM..................................................................................................................................517 (b) AUTO-LEVELER LED SYSTEM.....................................................................................................................................517 (c) BUCKET LEVER NEUTRAL SWITCH SYSTEM..........................................................................................................................518 (d) ENGINE SPEED SIGNAL SYSTEM..................................................................................................................................519 W-16 AUTO-LEVELER CANNOT BE SET ....................................................................................................................................520 (a) AUTO-LEVELER SET SWITCH SYSTEM..............................................................................................................................520 (b) AUTO-LEVELER SET LED SYSTEM.................................................................................................................................520 W-17 REMOTE POSITIONER RAISE, LOWER LEDS DO NOT LIGHT UP............................................................................................................521 (a) REMOTE POSITIONER SWITCH SYSTEM.............................................................................................................................521 (b) REMOTE POSITIONER LED SYSTEM................................................................................................................................521 W-18 REMOTE POSITIONER SET LEDS DO NOT FLASH........................................................................................................................522 (a) REMOTE POSITIONER SWITCH SYSTEM.............................................................................................................................522 (b) REMOTE POSITIONER LED SYSTEM................................................................................................................................522 W-19 BUCKET DOES NOT TILT IMMEDIATELY AT BOOM FLOAT DETENT WHEN REMOTE POSITIONER IS AT RAISE AND AUTO MODE IS ON ..................................................523 W-20 BUZZER FOR SWITCH OPERATION DOES NOT SOUND.....................................................................................................................524 W-21 BUCKET CORRECTION, BOOM STOP RESPONSE ARE SLOW.................................................................................................................525 W-22 BUCKET (LEVER) CONTROL ........................................................................................................................................526 (a) BUCKET KICK-OUT DOES NOT WORK EVEN WHEN BUCKET IS AT MAXIMUM TILT ..........................................................................................526 (b) LEVER IS NOT HELD BY DETENT ................................................................................................................................527 W-23 FAILURE CODE IS NOT DISPLAYED ON MAIN MONITOR..................................................................................................................529 W-24 MAINTENANCE MONITOR CHECK......................................................................................................................................530 TROUBLESHOOTING OF TRANSMISSION CONTROLLER SYSTEM (WITH AUTO-SIFT TRANSMISSION)(A MODE).................................................................................531 OUTLINE.............................................................................................................................................................532 1. FUNCTION.....................................................................................................................................................532 2. WHEN CARRYING OUT TROUBLESHOOTING............................................................................................................................532 3. FAILURE CODE TABLE...........................................................................................................................................532 4. ACTION CODE TABLE............................................................................................................................................533 5. TABLE OF TROUBLESHOOTING MODES AND CAUSES....................................................................................................................534 ELECTRICAL CIRCUIT DIAGRAM FOR TRANSMISSION CONTROLER SYSTEM........................................................................................................535 A-1 TROUBLESHOOTING CODE [12] F SOLENOID SIGNAL SYSTEM..............................................................................................................537 A-2 TROUBLESHOOTING CODE [13] R SOLENOID SIGNAL SYSTEM..............................................................................................................537 A-3 TROUBLESHOOTING CODE [14] ABNORMALITY IN H-L SOLENOID SIGNAL SYSTEM.............................................................................................538 A-4 TROUBLESHOOTING CODE [16] ABNORMALITY IN SPEED SOLENOID SIGNAL SYSTEM...........................................................................................539 A-5 TROUBLESHOOTING CODE [20] ABNORMALITY IN DIRECTIONAL LEVER SIGNAL SYSTEM........................................................................................540 A-6 TROUBLESHOOTING CODE [21] ABNORMALITY IN SPEED LEVER SIGNAL SYSTEM..............................................................................................541 A-7 TROUBLESHOOTING CODE [22] ABNORMALITY IN TRAVEL SPEED SIGNAL SYSTEM.............................................................................................542 A-8 TROUBLESHOOTING CODE [23] ABNORMALITY IN ENGINE SPEED SIGNAL....................................................................................................543 A-9 HOLD SWITCH SYSTEM..............................................................................................................................................544 A-10 KICK-DOWN SWITCH SYSTEM........................................................................................................................................544 A-11 TRANSMISSION CUT-OFF SIGNAL SYSTEM.............................................................................................................................545 A-12 NEUTRALIZER RELAY SIGNAL SYSTEM................................................................................................................................546 A-13 BUZZER SIGNAL SYSTEM...........................................................................................................................................547 A-14 NETWORK SIGNAL SYSTEM..........................................................................................................................................548 A-15 CONTROLLER POWER SOURCE SYSTEM.................................................................................................................................549 30 DISASSEMBLY AND ASSEMBLY.....................................................................................................................................................550 METHOD OF USING MANUAL .....................................................................................................................................................552 PRECAUTIONS WHEN CARRYING OUT OPERATION ....................................................................................................................................553 SPECIAL TOOL LIST...........................................................................................................................................................555 SKETCHES OF SPECIAL TOOLS...................................................................................................................................................557 STARTING MOTOR..............................................................................................................................................................558 REMOVAL AND INSTALLATION................................................................................................................................................558 ALTERNATOR..................................................................................................................................................................559 REMOVAL AND INSTALLATION................................................................................................................................................559 ENGINE OIL COOLER...........................................................................................................................................................560 REMOVAL AND INSTALLATION................................................................................................................................................560 FUEL INJECTION PUMP.........................................................................................................................................................561 REMOVAL.................................................................................................................................................................561 INSTALLATION............................................................................................................................................................562 WATER PUMP..................................................................................................................................................................563 REMOVAL AND INSTALLATION................................................................................................................................................563 TURBOCHARGER................................................................................................................................................................565 REMOVAL AND INSTALLATION................................................................................................................................................565 NOZZLE HOLDER ..............................................................................................................................................................566 REMOVAL AND INSTALLATION................................................................................................................................................566 THERMOSTAT..................................................................................................................................................................567 REMOVAL AND INSTALLATION................................................................................................................................................567 CYLINDER HEAD...............................................................................................................................................................568 REMOVAL ................................................................................................................................................................568 INSTALLATION............................................................................................................................................................573 RADIATOR....................................................................................................................................................................575 REMOVAL.................................................................................................................................................................575 INSTALLATION............................................................................................................................................................580 ENGINE......................................................................................................................................................................581 REMOVAL.................................................................................................................................................................581 INSTALLATION............................................................................................................................................................585 TORQUE CONVERTER CHARGING PUMP..............................................................................................................................................586 REMOVAL AND INSTALLATION................................................................................................................................................586 TORQUE CONVERTER, TRANSMISSION .............................................................................................................................................587 REMOVAL.................................................................................................................................................................587 INSTALLATION............................................................................................................................................................600 TORQUE CONVERTER............................................................................................................................................................603 DISASSEMBLY.............................................................................................................................................................603 ASSEMBLY................................................................................................................................................................605 TRANSMISSION................................................................................................................................................................607 DISASSEMBLY.............................................................................................................................................................607 ASSEMBLY................................................................................................................................................................617 TRANSMISSION CLUTCH PACK....................................................................................................................................................631 DISASSEMBLY.............................................................................................................................................................631 ASSEMBLY................................................................................................................................................................637 TRANSMISSION CONTROL VALVE..................................................................................................................................................649 REMOVAL.................................................................................................................................................................649 INSTALLATION............................................................................................................................................................651 DISASSEMBLY.............................................................................................................................................................652 ASSEMBLY................................................................................................................................................................654 TRANSMISSION ACCUMULATOR VALVE..............................................................................................................................................657 DISASSEMBLY.............................................................................................................................................................657 ASSEMBLY................................................................................................................................................................658 TRANSMISSION MODULATING VALVE...............................................................................................................................................659 DISASSEMBLY.............................................................................................................................................................659 ASSEMBLY................................................................................................................................................................660 DRIVE SHAFT.................................................................................................................................................................661 DISASSEMBLY.............................................................................................................................................................661 ASSEMBLY................................................................................................................................................................663 FRONT AXLE..................................................................................................................................................................665 REMOVAL.................................................................................................................................................................665 INSTALLATION............................................................................................................................................................667 REAR AXLE ..................................................................................................................................................................668 REMOVAL.................................................................................................................................................................668 INSTALLATION............................................................................................................................................................672 DIFFERENTIAL................................................................................................................................................................673 DISASSEMBLY.............................................................................................................................................................673 ASSEMBLY................................................................................................................................................................678 AXLE HOUSING ...............................................................................................................................................................688 DISASSEMBLY.............................................................................................................................................................688 ASSEMBLY................................................................................................................................................................694 CENTER HINGE PIN ...........................................................................................................................................................703 REMOVAL.................................................................................................................................................................703 INSTALLATION............................................................................................................................................................708 PRIORITY VALVE..............................................................................................................................................................712 REMOVAL.................................................................................................................................................................712 INSTALLATION............................................................................................................................................................713 STEERING VALVE..............................................................................................................................................................714 REMOVAL.................................................................................................................................................................714 INSTALLATION............................................................................................................................................................715 DISASSEMBLY.............................................................................................................................................................716 ASSEMBLY................................................................................................................................................................719 STEERING CYLINDER...........................................................................................................................................................724 REMOVAL.................................................................................................................................................................724 INSTALLATION............................................................................................................................................................725 RIGHT BRAKE VALVE (TANDEM)..................................................................................................................................................726 DISASSEMBLY.............................................................................................................................................................726 ASSEMBLY................................................................................................................................................................727 LEFT BRAKE VALVE (SINGLE)...................................................................................................................................................728 DISASSEMBLY.............................................................................................................................................................728 ASSEMBLY................................................................................................................................................................729 PARKING BRAKE DISC..........................................................................................................................................................730 REMOVAL.................................................................................................................................................................730 INSTALLATION............................................................................................................................................................732 ACCUMULATOR CHARGE VALVE....................................................................................................................................................733 REMOVAL.................................................................................................................................................................733 INSTALLATION............................................................................................................................................................733 DISASSEMBLY.............................................................................................................................................................734 ASSEMBLY................................................................................................................................................................736 HYDRAULIC TANK..............................................................................................................................................................738 REMOVAL.................................................................................................................................................................738 INSTALLATION............................................................................................................................................................739 HYDRAULIC FILTER............................................................................................................................................................740 REMOVAL AND INSTALLATION................................................................................................................................................740 HYDRAULIC, STEERING PUMP....................................................................................................................................................741 REMOVAL.................................................................................................................................................................741 INSTALLATION............................................................................................................................................................747 MAIN CONTROL VALVE..........................................................................................................................................................748 REMOVAL.................................................................................................................................................................748 INSTALLATION............................................................................................................................................................749 DISASSEMBLY.............................................................................................................................................................750 ASSEMBLY................................................................................................................................................................752 PPC VALVE...................................................................................................................................................................755 REMOVAL.................................................................................................................................................................755 INSTALLATION............................................................................................................................................................756 DISASSEMBLY.............................................................................................................................................................757 ASSEMBLY................................................................................................................................................................758 BUCKET CYLINDER.............................................................................................................................................................759 REMOVAL.................................................................................................................................................................759 INSTALLATION............................................................................................................................................................760 BOOM CYLINDER...............................................................................................................................................................761 REMOVAL.................................................................................................................................................................761 INSTALLATION............................................................................................................................................................762 HYDRAULIC CYLINDER..........................................................................................................................................................763 DISASSEMBLY.............................................................................................................................................................763 ASSEMBLY................................................................................................................................................................766 WORK EQUIPMENT .............................................................................................................................................................769 REMOVAL.................................................................................................................................................................769 INSTALLATION............................................................................................................................................................772 COUNTERWEIGHT...............................................................................................................................................................774 REMOVAL AND INSTALLATION................................................................................................................................................774 FUEL TANK...................................................................................................................................................................775 REMOVAL.................................................................................................................................................................775 INSTALLATION............................................................................................................................................................777 CAB ........................................................................................................................................................................778 REMOVAL.................................................................................................................................................................778 INSTALLATION............................................................................................................................................................779 MAIN MONITOR................................................................................................................................................................780 REMOVAL.................................................................................................................................................................780 INSTALLATION............................................................................................................................................................781 MAINTENANCE MONITOR.........................................................................................................................................................782 REMOVAL AND INSTALLATION................................................................................................................................................782 AIR CONDITIONER UNIT........................................................................................................................................................783 REMOVAL.................................................................................................................................................................783 INSTALLATION............................................................................................................................................................788 AIR CONDITIONER CONDENSER...................................................................................................................................................789 REMOVAL.................................................................................................................................................................789 INSTALLATION............................................................................................................................................................790 DRY RECEIVER ...............................................................................................................................................................791 REMOVAL AND INSTALLATION................................................................................................................................................791 AIR CONDITIONER COMPRESSOR..................................................................................................................................................792 REMOVAL.................................................................................................................................................................792 INSTALLATION............................................................................................................................................................793 40 MAINTENANCE STANDARD.........................................................................................................................................................794 ENGINE MOUNT, TRANSMISSION MOUNT............................................................................................................................................795 TORQUE CONVERTER CHARGING PUMP..............................................................................................................................................796 TORQUE CONVERTER............................................................................................................................................................797 TRANSMISSION................................................................................................................................................................798 TRANSMISSION CONTROL VALVE..................................................................................................................................................806 MODULATION VALVE ASSEMBLY...................................................................................................................................................810 ACCUMULATOR VALVE...........................................................................................................................................................811 DRIVE SHAFT.................................................................................................................................................................812 DIFFERENTIAL................................................................................................................................................................813 FINAL DRIVE.................................................................................................................................................................819 AXLE MOUNT..................................................................................................................................................................823 CENTER HINGE PIN............................................................................................................................................................824 STEERING COLUMN.............................................................................................................................................................826 PRIORITY VALVE..............................................................................................................................................................827 STEERING CYLINDER MOUNT.....................................................................................................................................................828 BRAKE ......................................................................................................................................................................829 BRAKE VALVE.................................................................................................................................................................831 PARKING BRAKE...............................................................................................................................................................834 HYDRAULIC PUMP .............................................................................................................................................................835 MAIN CONTROL VALVE..........................................................................................................................................................836 PPC VALVE...................................................................................................................................................................840 HYDRAULIC CYLINDER..........................................................................................................................................................841 WORK EQUIPMENT LINKAGE......................................................................................................................................................842 BUCKET......................................................................................................................................................................844 BUCKET POSITIONER AND BOOM KICK-OUT.........................................................................................................................................845
KOMATSU WA320-3 AVANCE LOADER WHEEL LOADER SHOP MANUAL 50001 AND UP – PDF DOWNLOAD:
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