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KOMATSU PC400, 400LC-7 PC450, 450LC-7 SHOP MANUAL SEBM033005 – PDF DOWNLOAD
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Description
KOMATSU PC400, 400LC-7 PC450, 450LC-7 SHOP MANUAL SEBM033005 – PDF DOWNLOAD
FILE DETAILS:
KOMATSU PC400, 400LC-7 PC450, 450LC-7 SHOP MANUAL SEBM033005 – PDF DOWNLOAD
Language : English
Pages : 785
Downloadable : Yes
File Type : PDF
IMAGES PREVIEW OF THE MANUAL:
TABLE OF CONTENTS:
KOMATSU PC400, 400LC-7 PC450, 450LC-7 SHOP MANUAL SEBM033005 – PDF DOWNLOAD
MAIN MENU........................................................................................................................... 0 COVER............................................................................................................................... 1 CONTENTS............................................................................................................................ 2 SAFETY ............................................................................................................................. 8 SAFETY NOTICE................................................................................................................... 8 FOREWORD............................................................................................................................ 10 GENERAL......................................................................................................................... 10 HOW TO READ THE SHOP MANUAL..................................................................................................... 11 HOISTING INSTRUCTIONS........................................................................................................... 12 METHOD OF DISASSEMBLING, CONNECTING PUSH-PULL TYPE COUPLER...................................................................... 13 COATING MATERIALS............................................................................................................... 15 STANDARD TIGHTENING TORQUE...................................................................................................... 17 ELECTRIC WIRE CODE.............................................................................................................. 20 CONVERSION TABLE................................................................................................................ 21 UNITS........................................................................................................................... 27 01 GENERAL.......................................................................................................................... 28 SPECIFICATION DRAWINGS.......................................................................................................... 29 SPECIFICATIONS.................................................................................................................. 31 WEIGHT TABLE.................................................................................................................... 35 FUEL, COOLANT AND LUBRICANTS.................................................................................................... 39 10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD..................................................................................... 40 ENGINE RELATED PARTS............................................................................................................ 41 RADIATOR•OIL COOLER•AFTERCOOLER............................................................................................. 42 POWER TRAIN..................................................................................................................... 43 FINAL DRIVE..................................................................................................................... 45 SPROCKET........................................................................................................................ 47 SWING MACHINERY................................................................................................................. 49 SWING CIRCLE.................................................................................................................... 51 TRACK FRAME AND RECOIL SPRING................................................................................................... 53 IDLER........................................................................................................................... 55 CARRIER ROLLER.................................................................................................................. 57 TRACK ROLLER.................................................................................................................... 58 TRACK SHOE...................................................................................................................... 59 HYDRAULIC PIPING DRAWING........................................................................................................ 63 HYDRAULIC TANK.................................................................................................................. 65 HYDRAULIC PUMP.................................................................................................................. 67 LS(PC)-EPC VALVE................................................................................................................ 85 VARIABLE VOLUME VALVE........................................................................................................... 88 CONTROL VALVE................................................................................................................... 91 MAIN RELIEF VALVE...............................................................................................................105 CLSS............................................................................................................................107 SELF PRESSURE REDUCING VALVE....................................................................................................110 SWING MOTOR.....................................................................................................................113 CENTER SWIVEL JOINT.............................................................................................................121 TRAVEL MOTOR....................................................................................................................123 TRAVEL JUNCTION VALVE...........................................................................................................134 VALVE CONTROL...................................................................................................................136 TRAVEL PPC SHUTTLE VALVE........................................................................................................137 WORK EQUIPMENT • SWING PPC VALVE................................................................................................141 TRAVEL PPC VALVE................................................................................................................145 SERVICE PPC VALVE...............................................................................................................152 SOLENOID VALVE..................................................................................................................153 PPC ACCUMULATOR.................................................................................................................155 RETURN OIL FILTER...............................................................................................................156 BOOM HYDRAULIC DRIFT PREVENTION VALVE...........................................................................................157 ARM HYDRAULIC DRIFT PREVENTION VALVE............................................................................................162 QUICK RETURN VALVE..............................................................................................................166 LIFT CHECK VALVE................................................................................................................168 ATTACHMENT CIRCUIT SELECTOR VALVE...............................................................................................169 HOLDING VALVE...................................................................................................................171 HYDRAULIC CYLINDER..............................................................................................................177 WORK EQUIPMENT..................................................................................................................179 AIR CONDITIONER.................................................................................................................185 ENGINE CONTROL..................................................................................................................186 ELECTRONIC CONTROL SYSTEM.......................................................................................................192 MONITOR SYSTEM..................................................................................................................219 7-SEGMENT MONITOR SYSTEM........................................................................................................239 SENSOR..........................................................................................................................246 20 TESTING AND ADJUSTING............................................................................................................249 STANDARD VALUE TABLE FOR ENGINE.................................................................................................250 STANDARD VALUE TABLE FOR CHASSIS................................................................................................251 TESTING AND ADJUSTING...........................................................................................................261 TESTING, ADJUSTING, AND TROUBLESHOOTING TOOLS TABLE.........................................................................262 MEASURING ENGINE SPEED......................................................................................................264 MEASURING INTAKE AIR PRESSURE (BOOST PRESSURE)..............................................................................265 MEASURING EXHAUST TEMPERATURE...............................................................................................266 MEASURING EXHAUST GAS COLOR.................................................................................................267 ADJUSTING VALVE CLEARANCE...................................................................................................268 MEASURING COMPRESSION PRESSURE..............................................................................................270 MEASURING BLOW-BY PRESSURE..................................................................................................272 MESURING ENGINE OIL PRESSURE................................................................................................273 HANDLING OF FUEL SYSTEM DEVICES.............................................................................................274 RELEASING RESIDUAL PRESSURE FROM FUEL SYSTEM................................................................................274 MEASURING FUEL PRESSURE.....................................................................................................275 BLEEDING AIR FROM FUEL CIRCUIT..............................................................................................276 INSPECTION OF FUEL CIRCUIT FOR LEAKAGE......................................................................................278 ADJUSTING ENGINE SPEED SENSOR...............................................................................................279 TESTING AND ADJUSTING FAN BELT AND ALTERNATOR BELT TENSION..................................................................280 TESTING AND ADJUSTING AIR CONDITIONER COMPRESSOR BELT TENSION...............................................................281 MEASURING CLEARANCE OF SWING CIRCLE BEARING.................................................................................282 TESTING AND ADJUSTING TRACK SHOE TENSION....................................................................................283 TESTING AND ADJUSTING OIL PRESSURE IN WORK EQUIPMENT, SWING, AND TRAVEL CIRCUITS............................................284 MEASURING BASIC PRESSURE IN CONTROL CIRCUIT.................................................................................288 TESTING AND ADJUSTING OIL PRESSURE IN PUMP PC CONTROL CIRCUIT...............................................................289 TESTING AND ADJUSTING OIL PRESSURE IN PUMP LS CONTROL CIRCUIT...............................................................292 MEASURING SOLENOID VALVE OUTPUT PRESSURE....................................................................................297 MEASURING PPC VALVE OUTPUT PRESSURE.........................................................................................300 ADJUSTING PLAY OF WORK EQUIPMENT AND SWING PPC VALVES.......................................................................302 TESTING PARTS WHICH CAUSE HYDRAULIC DRIFT OF WORK EQUIPMENT.................................................................303 RELEASING RESIDUAL PRESSURE IN HYDRAULIC CIRCUIT............................................................................305 MEASURING OIL LEAKAGE.......................................................................................................306 BLEEDING AIR FROM EACH PART.................................................................................................309 TESTING PROCEDURE OF DIODE..................................................................................................312 SPECIAL FUNCTIONS OF MONITOR PANEL..........................................................................................313 HANDLING OF HIGH VOLTAGE CIRCUIT OF ENGINE CONTROLLER.......................................................................340 PREPARATION WORK FOR TROUBLESHOOTING FOR ELECTRICAL EQUIPMENT SYSTEM........................................................341 PM CLINIC SERVICE...........................................................................................................343 TROUBLESHOOTING.................................................................................................................351 POINTS TO REMEMBER WHEN TROUBLESHOOTING.....................................................................................352 SEQUENCE OF EVENTS IN TROUBLESHOOTING.......................................................................................353 POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE............................................................................354 CHECKS BEFORE TROUBLESHOOTING...............................................................................................362 CLASSIFICATION AND STEPS FOR TROUBLESHOOTING................................................................................363 CONNECTOR ARRANGEMENT DRAWING AND ELECTRIC CIRCUIT DIAGRAM OF EACH SYSTEM...................................................367 CONNECTION TABLE FOR CONNECTOR PIN NUMBERS..................................................................................384 T-BRANCH BOX AND T-BRANCH TABLE.............................................................................................406 TROUBLESHOOTING WHEN ERROR CODE "ELECTRICAL SYSTEM" AND FAILURE CODE "MECHANICAL SYSTEM" ARE DISPLAYED......................409 INFORMATION CONTAINED IN TROUBLESHOOTING TABLE..........................................................................412 Error Code in Electrical System [E112] (Short-circuiting in normal rotation system of windshield wiper motor drive).....414 Error Code in Electrical System [E113] (Short-circuiting in reverse rotation system of windshield wiper motor drive)....416 Error Code in Electrical System [E114] (Short-circuiting in window washer drive system).................................418 Error Code in Electrical System [E115] (Abnormal Windshield Wiper Motion)...............................................420 Error Code in Electrical System [E116] (Abnormality in retracting windshield wiper).....................................422 Error Code in Electrical System [E117] (Eng. Controller S-NET Comm. Err.) ..............................................424 Error Code in Electrical System [E118] (Pump Controller S-NET Comm. Err.) ..............................................426 Error Code in Electrical System [E128] (Monitor Comm. Abnormality)......................................................428 Error Code in Electrical System [E201] (Short-circuiting in travel interlocking solenoid)...............................430 Error Code in Electrical System [E203] (Short-circuiting in swing holding brake solenoid)...............................432 Error Code in Electrical System [E204] (Short-circuiting in merge/divide solenoid)......................................434 Error Code in Electrical System [E205] (Short-circuiting in 2-stage relief solenoid)....................................435 Error Code in Electrical System [E206] (Short-circuiting in travel speed shifting solenoid).............................436 Error Code in Electrical System [E211] (Disconnection in travel interlocking solenoid)..................................437 Error Code in Electrical System [E213] (Disconnection in swing holding brake solenoid)..................................438 Error Code in Electrical System [E214] (Disconnection of merge/divide solenoid).........................................440 Error Code in Electrical System [E215] (Disconnection in 2-stage relief solenoid).......................................441 Error Code in Electrical System [E216] (Disconnection in travel speed shifting solenoid)................................442 Error Code in Electrical System [E217] (Abnormal input model code) .....................................................444 Error Code in Electrical System [E218] (S-Net Comm. Disc.) .............................................................446 Error Code in Electrical System [E222] (Short-circuiting in LS-EPC solenoid)............................................448 Error Code in Electrical System [E223] (Disconnection in LS-EPC solenoid system)........................................449 Error Code in Electrical System [E224] (F Pump P. Sensor Abnormality) ..................................................450 Error Code in Electrical System [E225] (R Pump P. Sensor Abnormality)...................................................452 Error Code in Electrical System [E226] (Press. Sensor Power Abnormality)................................................454 Error Code in Electrical System [E227] (Abnormality in engine rotation sensor)..........................................456 Error Code in Electrical System [E228] (Short-circuiting in attachment return switching relay)..........................457 Error Code in Electrical System [E232] (Short-circuiting in PC-EPC Solenoid)............................................458 Error Code in Electrical System [E233] (Disconnection in PC-EPC solenoid system)........................................460 Error Code in Electrical System [E238] (Disconnection in attachment return switching relay).............................462 Error Code in Electrical System [E245] (Short-circuiting in attachment oil flow rate adjusting EPC).....................464 Error Code in Electrical System [E246] (Disconnection in attachment oil flow rate adjusting EPC)........................465 Error Code in Electrical System [E247] (Arm IN PPC pressure sensor abnormality).........................................466 Error Code in Electrical System [E248] (Bucket CURL PPC pressure sensor abnormality)....................................468 Error Code in Electrical System [E257] (Pump Abnormality)...............................................................470 Error Code in Electrical System [E315] (Battery Relay Drive S/C) .......................................................472 Error Code in Electrical System [E91B] (Engine Ne sensor problem).......................................................474 Error Code in Electrical System [E91C] (Engine G sensor problem)........................................................475 Error Code in Electrical System [E920] (Engine type selection error)....................................................476 Error Code in Electrical System [E921] (Engine type mismatch)...........................................................478 Error Code in Electrical System [E931] (Fuel dial sys. error)...........................................................480 Error Code in Electrical System [E934] (Engine coolant sensor Hi error).................................................482 Error Code in Electrical System [E936] (Engine oil press. sw. error)....................................................484 Error Code in Electrical System [E93C] (Engine boost sensor error)......................................................486 Error Code in Electrical System [E93D] (Engine fuel temp. sensor error).................................................488 Error Code in Electrical System [E953] (Engine Comm. Abnormality).......................................................490 Error Code in Electrical System [E954] (Short engine starter sw.).......................................................492 Error Code in Electrical System [E955] (Engine S-NET error).............................................................494 Error Code in Electrical System [E956] (Engine power failure (1)).......................................................496 Error Code in Electrical System [E957] (Engine power failure (2)).......................................................498 Error Code in Electrical System [E95A] (Engine Q-adj. sw. signal error) ................................................500 Error Code in Electrical System [E96A] (Engine coolant sensor Lo error) ................................................502 Error Code in Electrical System [E970] (PCV1 over current)..............................................................504 Error Code in Electrical System [E971] (PCV2 over current)..............................................................505 Error Code in Electrical System [E974] (PCV1 line cut)..................................................................506 Error Code in Electrical System [E975] (PCV2 line cut)..................................................................507 Error Code in Electrical System [E977] (Rail press. sensor error).......................................................508 Error Code in Electrical System [E979] (Rail press. high)...............................................................510 Error Code in Electrical System [E97A] (Rail press. abnormal)...........................................................510 Error Code in Electrical System [E97B] (Rail press. low)................................................................511 Error Code in Electrical System [E97C] (Rail press. too low)............................................................513 Error Code in Electrical System [E97D] (Rail press. out of control).....................................................513 Error Code in Electrical System [E980] (Eng. Controller Abnormality)....................................................514 Error Code in Electrical System [E981] (Fuel Injector 1 Disc.)..........................................................516 Error Code in Electrical System [E982] (Fuel Injector 2 Disc.) .........................................................517 Error Code in Electrical System [E983] (Fuel Injector 3 Disc.)..........................................................518 Error Code in Electrical System [E984] (Fuel Injector 4 Disc.)..........................................................519 Error Code in Electrical System [E985] (Fuel Injector 5 Disc.)..........................................................520 Error Code in Electrical System [E986] (Fuel Injector 6 Disc.)..........................................................521 Error Code in Electrical System [E98A] (Fuel Injector 1 – 3 S/C)........................................................522 Error Code in Electrical System [E98B] (Fuel Injector 4 – 6 S/C)........................................................524 Error Code in Mechanical System [A000N1] (Engine high-idling speed out of standard).....................................526 Error Code in Mechanical System [A000N2] (Engine low-idling speed out of standard)......................................526 Failure Code in Mechanical System [AA10NX] (Aircleaner Clogging)........................................................528 Failure Code in Mechanical System [AB00KE] (Charge Voltage Low).........................................................530 Failure Code in Mechanical System [B@BAZG] (Eng. Oil Press. Low)........................................................532 Failure Code in Mechanical System [B@BAZK] (Eng. Oil Level Low).........................................................534 Failure Code in Mechanical System [B@BCNS] (Eng. Water Overheat)........................................................535 Failure Code in Mechanical System [B@BCZK] (Eng. Water Lvl Low).........................................................536 Failure Code in Mechanical System [B@HANS] (Hydr. Oil Overheat).........................................................537 TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE)...............................................................................539 INFORMATION CONTAINED IN TROUBLESHOOTING TABLE..........................................................................541 E-1 The engine does not start (The engine does not rotate)............................................................542 E-2 Preheater does not operate........................................................................................546 E-3 Auto engine warm-up device does not work..........................................................................548 E-4 Auto-decelerator does not operate..................................................................................549 E-5 All work equipment, swing and travel do not move..................................................................550 E-6 One-touch power max. function does not operate....................................................................552 E-7 Machine push-up function does not operate normally................................................................553 E-8 Attachment circuit does not change................................................................................555 E-9 No display in monitor panel at all................................................................................557 E-10 Part of display on monitor panel is missing......................................................................558 E-11 Monitor panel displays contents irrelevant to the model..........................................................558 E-12 Fuel level monitor red lamp lights up while engine is running....................................................559 E-13 Engine water temperature gauge does not display correctly........................................................560 E-14 Hydraulic oil temperature gauge does not display correctly.......................................................562 E-15 Fuel gauge does not display correctly............................................................................563 E-16 Swing lock monitor does not display correctly....................................................................564 E-17 When monitor switch is operated, nothing is displayed............................................................566 E-18 Windshield wiper and window washer do not work...................................................................568 E-19 Alarm buzzer cannot be cancelled.................................................................................572 E-20 “Boom RAISE” is not correctly displayed in monitor function......................................................573 E-21 “Boom LOWER” is not correctly displayed in monitor function......................................................574 E-22 “Arm IN” is not displayed normally in monitoring function........................................................575 E-23 “Arm DUMPING” is not correctly displayed in monitor function.....................................................576 E-24 “Bucket CURL” is not displayed normally in monitoring function...................................................577 E-25 “Bucket DUMPING” is not correctly displayed in monitor function..................................................578 E-26 “Swing” is not displayed normally in monitoring function.........................................................580 E-27 “TRAVEL” is not correctly displayed in monitor function..........................................................582 E-28 “Travel Differential Pressure” is not correctly displayed in monitor function....................................584 E-29 “Service” is not correctly displayed in monitor function.........................................................586 E-30 Travel alarm does not sound or does not stop sounding............................................................588 E-31 TROUBLESHOOTING FOR AIR CONDITIONER SYSTEM.......................................................................590 TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (H MODE).................................................................601 SYSTEM CHART FOR HYDRAULIC AND MECHANICAL SYSTEM........................................................................602 INFORMATION CONTAINED IN TROUBLESHOOTING TABLE..........................................................................604 H-1 All work equipment lack power, or travel and swing speeds are slow................................................605 H-2 Engine speed sharply drops or engine stalls.......................................................................606 H-3 No work equipment, travel or swing move...........................................................................607 H-4 Abnormal noise is heard from around hydraulic pump................................................................607 H-5 Auto-decelerator does not work....................................................................................608 H-6 Fine control mode does not function...............................................................................608 H-7 Boom moves slowly or lacks power..................................................................................609 H-8 Arm moves slowly or lacks power...................................................................................610 H-9 Bucket moves slowly or lacks power................................................................................611 H-10 Work equipment does not move in its single operation.............................................................611 H-11 Work equipment has a bit too fast hydraulic drift................................................................612 H-12 Work equipment has big time lag..................................................................................613 H-13 Other work equipment moves when relieving single circuit.........................................................613 H-14 One-touch power max. function does not work......................................................................613 H-15 Machine push-up function does not work............................................................................614 H-16 In compound operation, work equipment with larger load moves slowly..............................................615 H-17 In swing + boom RAISE operation, boom moves slowly...............................................................615 H-18 In swing + travel, travel speed drops sharply....................................................................615 H-19 Machine swerves in travel........................................................................................616 H-20 Machine travels slowly...........................................................................................617 H-21 Machine cannot be easily steered or lacks power..................................................................618 H-22 Travel speed does not shift, or it is slower or faster than preset speed.........................................619 H-23 Track shoe does not turn (on one side only)......................................................................620 H-24 Machine does not swing...........................................................................................621 H-25 Swing acceleration is poor, or swing speed is slow...............................................................622 H-26 Excessive overrun when stopping swing............................................................................623 H-27 There is big shock when stopping swing...........................................................................624 H-28 There is big abnormal noise caused when stopping swing...........................................................624 H-29 Swing natural drift is too big...................................................................................625 H-30 Attachment circuit does not change...............................................................................626 H-31 Flow rate in attachment circuit cannot be adjusted...............................................................626 TROUBLESHOOTING OF ENGINE (S MODE)..........................................................................................627 POINTS TO REMEMBER WHEN TROUBLESHOOTING.................................................................................628 METHOD OF USING TROUBLESHOOTING CHARTS..................................................................................629 S-1 Starting performance is poor (starting always takes time)...........................................................632 S-2 Engine does not start...............................................................................................633 S-3 Engine does not pick up smoothly (follow-up is poor)................................................................636 S-4 Engine stops during operations......................................................................................637 S-5 Engine does not rotate smoothly (hunting)...........................................................................638 S-6 Engine lacks output (or lacks power)................................................................................639 S-7 Exhaust smoke is black (incomplete combustion)......................................................................640 S-8 Oil consumption is excessive (or exhaust smoke is blue).............................................................641 S-9 Oil becomes contaminated quickly....................................................................................642 S-10 Fuel consumption is excessive......................................................................................643 S-11 Oil is in cooling water (or water spurts back, or water level goes down)...........................................644 S-12 Oil pressure caution lamp lights up (drop in oil pressure).........................................................645 S-13 Oil level rises (water, fuel in oil)...............................................................................646 S-14 Water temperature becomes too high (overheating)...................................................................647 S-15 Abnormal noise is made.............................................................................................648 S-16 Vibration is excessive.............................................................................................649 30 DISASSEMBLY AND ASSEMBLY.........................................................................................................650 HOW TO READ THIS MANUAL.........................................................................................................651 PRECAUTIONS WHEN PERFORMING OPERATION...........................................................................................653 SPECIAL TOOL LIST...............................................................................................................655 REMOVAL AND INSTALLATION OF CYLINDER HEAD ASSEMBLY..............................................................................663 REMOVAL AND INSTALLATION OF ENGINE REAR SEAL....................................................................................670 REMOVAL AND INSTALLATION OF ENGINE FRONT SEAL...................................................................................674 REMOVAL AND INSTALLATION OF FUEL SUPPLY PUMP ASSEMBLY...........................................................................677 REMOVAL AND INSTALLATION OF FUEL INJECTOR ASSEMBLY..............................................................................680 REMOVAL AND INSTALLATION OF NOZZLE TIP..........................................................................................683 REMOVAL AND INSTALLATION OF STARTING MOTOR ASSEMBLY.............................................................................685 REMOVAL AND INSTALLATION OF RADIATOR ASSEMBLY...................................................................................686 REMOVAL AND INSTALLATION OF HYDRAULIC OIL COOLER ASSEMBLY.......................................................................688 REMOVAL AND INSTALLATION OF ENGINE AND HYDRAULIC PUMP ASSEMBLY..................................................................690 REMOVAL AND INSTALLATION OF SWING CIRCLE ASSEMBLY...............................................................................695 REMOVAL AND INSTALLATION OF SWING MOTOR AND SWING MACHINERY ASSEMBLY............................................................696 DISASSEMBLY AND ASSEMBLY OF SWING MOTOR AND SWING MACHINERY ASSEMBLY............................................................697 REMOVAL AND INSTALLATION OF SPROCKET............................................................................................704 REMOVAL AND INSTALLATION OF TRAVEL MOTOR AND FINAL DRIVE ASSEMBLY...............................................................705 DISASSEMBLY AND ASSEMBLY OF FINAL DRIVE ASSEMBLY................................................................................706 DISASSEMBLY AND ASSEMBLY OF CARRIER ROLLER ASSEMBLY.............................................................................713 DISASSEMBLY AND ASSEMBLY OF TRACK ROLLER ASSEMBLY...............................................................................715 DISASSEMBLY AND ASSEMBLY OF IDLER ASSEMBLY......................................................................................716 DISASSEMBLY AND ASSEMBLY OF RECOIL SPRING ASSEMBLY..............................................................................719 EXPANSION AND INSTALLATION OF TRACK SHOE ASSEMBLY...............................................................................721 REMOVAL AND INSTALLATION OF AIR CONDITIONER UNIT ASSEMBLY.......................................................................723 REMOVAL AND INSTALLATION OF OPERATOR’S CAB......................................................................................725 REMOVAL AND INSTALLATION OF MONITOR ASSEMBLY....................................................................................728 REMOVAL AND INSTALLATION OF PUMP CONTROLLER.....................................................................................729 REMOVAL AND INSTALLATION OF ENGINE CONTROLLER...................................................................................730 REMOVAL AND INSTALLATION OF REVOLVING FRAME ASSEMBLY............................................................................731 REMOVAL AND INSTALLATION OF COUNTERWEIGHT ASSEMBLY..............................................................................734 REMOVAL AND INSTALLATION OF HYDRAULIC TANK ASSEMBLY.............................................................................735 REMOVAL AND INSTALLATION OF HYDRAULIC PUMP ASSEMBLY.............................................................................737 REMOVAL AND INSTALLATION OF OIL SEAL IN HYDRAULIC PUMP INPUT SHAFT..............................................................740 REMOVAL AND INSTALLATION OF CONTROL VALVE ASSEMBLY..............................................................................741 DISASSEMBLY AND ASSEMBLY OF CONTROL VALVE ASSEMBLY..............................................................................744 REMOVAL AND INSTALLATION OF CENTER SWIVEL JOINT ASSEMBLY........................................................................748 DISASSEMBLY AND ASSEMBLY OF OF CENTER SWIVEL JOINT ASSEMBLY.....................................................................750 DISASSEMBLY AND ASSEMBLY OF WORK EQUIPMENT PPC VALVE ASSEMBLY...................................................................751 DISASSEMBLY AND ASSEMBLY OF TRAVEL PPC VALVE ASSEMBLY...........................................................................752 DISASSEMBLY AND ASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLY.........................................................................753 REMOVAL AND INSTALLATION OF WORK EQUIPMENT ASSEMBLY.............................................................................758 REMOVAL AND INSTALLATION OF OPERATOR’S CAB GLASS (STUCK GLASS)..................................................................761 REMOVAL AND INSTALLATION OF FRONT WINDOW ASSEMBLY...............................................................................771 90 OTHERS...........................................................................................................................777 HYDRAULIC CIRCUIT DIAGRAM (1/2).................................................................................................778 HYDRAULIC CIRCUIT DIAGRAM (2/2).................................................................................................779 ELECTRICAL CIRCUIT DIAGRAM (1/5)................................................................................................780 ELECTRICAL CIRCUIT DIAGRAM (2/5)................................................................................................781 ELECTRICAL CIRCUIT DIAGRAM (3/5) ...............................................................................................782 ELECTRICAL CIRCUIT DIAGRAM (4/5)................................................................................................783 ELECTRICAL CIRCUIT DIAGRAM (5/5)................................................................................................784 AIR CONDITIONER ELECTRICAL CIRCUIT..............................................................................................785
DESCRIPTION:
KOMATSU PC400, 400LC-7 PC450, 450LC-7 SHOP MANUAL SEBM033005 – PDF DOWNLOAD
FOREWORD
GENERAL
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 the following chapters; these chapters are further divided into the each main group of components.
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. In addition, this section may contain hydraulic circuit diagrams, electric circuit diagrams, and maintenance standards.
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” with “Causes” are also included in this section.
DISASSEMBLY AND ASSEMBLY
This section explains the procedures for removing, installing, disassembling and assembling each component, as well as precautions for them.
MAINTENANCE STANDARD
This section gives the judgment standards for inspection of disassembled parts. The contents of this section may be described in STRUCTURE AND FUNCTION.
OTHERS
This section mainly gives hydraulic circuit diagrams and electric circuit diagrams. In addition, this section may give the specifications of attachments and options together
S.S 29/12/24
