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KOMATSU PC400-7 PC400LC-7 SHOP MANUAL SEBM037603 – PDF DOWNLOAD
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Description
KOMATSU PC400-7 PC400LC-7 SHOP MANUAL SEBM037603 – PDF DOWNLOAD
FILE DETAILS:
KOMATSU PC400-7 PC400LC-7 SHOP MANUAL SEBM037603 – PDF DOWNLOAD
Language : English
Pages : 794
Downloadable : Yes
File Type : PDF
IMAGES PREVIEW OF THE MANUAL:
TABLE OF CONTENTS:
KOMATSU PC400-7 PC400LC-7 SHOP MANUAL SEBM037603 – PDF DOWNLOAD
COVER............................................................................................................................... 1 CONTENTS............................................................................................................................ 2 LIST OF REVISED PAGES............................................................................................................... 3 SAFETY.............................................................................................................................. 9 FOREWORD............................................................................................................................ 11 GENERAL......................................................................................................................... 11 HOW TO READ THE SHOP MANUAL..................................................................................................... 12 HOISTING INSTRUCTIONS........................................................................................................... 13 METHOD OF DISASSEMBLING, CONNECTING PUSH-PULL TYPE COUPLER...................................................................... 14 COATING MATERIALS............................................................................................................... 16 STANDARD TIGHTENING TORQUE...................................................................................................... 18 ELECTRIC WIRE CODE.............................................................................................................. 21 CONVERSION TABLE................................................................................................................ 22 UNITS........................................................................................................................... 28 01 GENERAL.......................................................................................................................... 29 SPECIFICATION DRAWINGS.......................................................................................................... 30 SPECIFICATIONS.................................................................................................................. 32 WEIGHT TABLE.................................................................................................................... 34 FUEL, COOLANT AND LUBRICANTS.................................................................................................... 36 10 STRUCTURE, FUNCTION ANDMAINTENANCE STANDARD...................................................................................... 39 ENGINE RELATED PARTS............................................................................................................ 40 RADIATOR • OIL COOLER • AFTERCOOLER............................................................................................. 41 POWER TRAIN..................................................................................................................... 42 FINAL DRIVE..................................................................................................................... 44 SPROCKET........................................................................................................................ 46 SWING MACHINERY................................................................................................................. 48 SWING CIRCLE.................................................................................................................... 50 TRACK FRAME AND RECOIL SPRING................................................................................................... 52 IDLER........................................................................................................................... 54 CARRIER ROLLER.................................................................................................................. 56 TRACK ROLLER.................................................................................................................... 57 TRACK SHOE...................................................................................................................... 58 HYDRAULIC PIPING DRAWING........................................................................................................ 62 HYDRAULIC TANK.................................................................................................................. 64 HYDRAULIC PUMP.................................................................................................................. 66 LS(PC)-EPC VALVE................................................................................................................ 84 VARIABLE VOLUME VALVE........................................................................................................... 87 CONTROL VALVE................................................................................................................... 90 MAIN RELIEF VALVE...............................................................................................................104 CLSS............................................................................................................................106 SELF PRESSURE REDUCING VALVE....................................................................................................109 SWING MOTOR.....................................................................................................................112 REVERSAL PREVENTION VALVE.......................................................................................................118 CENTER SWIVEL JOINT.............................................................................................................120 TRAVEL MOTOR....................................................................................................................122 TRAVEL JUNCTION VALVE...........................................................................................................133 VALVE CONTROL...................................................................................................................135 TRAVEL PPC SHUTTLE VALVE........................................................................................................136 WORK EQUIPMENT • SWING PPC VALVE................................................................................................140 TRAVEL PPC VALVE................................................................................................................144 SERVICE PPC VALVE...............................................................................................................151 SOLENOID VALVE..................................................................................................................152 PPC ACCUMULATOR.................................................................................................................154 RETURN OIL FILTER...............................................................................................................155 BOOM HYDRAULIC DRIFT PREVENTION VALVE...........................................................................................156 ARM HYDRAULIC DRIFT PREVENTION VALVE............................................................................................161 QUICK RETURN VALVE..............................................................................................................165 LIFT CHECK VALVE................................................................................................................167 ATTACHMENT CIRCUIT SELECTOR VALVE...............................................................................................168 HOLDING VALVE...................................................................................................................170 HYDRAULIC CYLINDER..............................................................................................................176 WORK EQUIPMENT..................................................................................................................178 COMBUSTION HEATER AND PARTS RELATED TO HEATER...................................................................................184 ENGINE CONTROL..................................................................................................................187 ELECTRONIC CONTROL SYSTEM.......................................................................................................193 MONITOR SYSTEM..................................................................................................................220 7-SEGMENT MONITOR SYSTEM........................................................................................................240 SENSOR..........................................................................................................................248 20 TESTING AND ADJUSTING............................................................................................................251 STANDARD VALUE TABLE FOR ENGINE.................................................................................................252 STANDARD VALUE TABLE FOR CHASSIS................................................................................................253 TESTING AND ADJUSTING...........................................................................................................263 TESTING, ADJUSTING, AND TROUBLESHOOTING TOOLS TABLE.........................................................................264 MEASURING ENGINE SPEED......................................................................................................266 MEASURING INTAKE AIR PRESSURE (BOOST PRESSURE)..............................................................................267 MEASURING EXHAUST TEMPERATURE...............................................................................................268 MEASURING EXHAUST GAS COLOR.................................................................................................269 ADJUSTING VALVE CLEARANCE...................................................................................................270 MEASURING COMPRESSION PRESSURE..............................................................................................272 MEASURING BLOW-BY PRESSURE..................................................................................................274 MEASURING ENGINE OIL PRESSURE...............................................................................................275 HANDLING OF FUEL SYSTEM DEVICES.............................................................................................276 RELEASING RESIDUAL PRESSURE FROM FUEL SYSTEM................................................................................276 MEASURING FUEL PRESSURE.....................................................................................................277 BLEEDING AIR FROM FUEL CIRCUIT..............................................................................................278 INSPECTION OF FUEL CIRCUIT FOR LEAKAGE......................................................................................280 ADJUSTING ENGINE SPEED SENSOR...............................................................................................281 TESTING AND ADJUSTING FAN BELT AND ALTERNATOR BELT TENSION..................................................................282 MEASURING CLEARANCE OF SWING CIRCLE BEARING.................................................................................283 TESTING AND ADJUSTING TRACK SHOE TENSION....................................................................................284 TESTING AND ADJUSTING OIL PRESSURE IN WORK EQUIPMENT, SWING, AND TRAVEL CIRCUITS............................................285 MEASURING BASIC PRESSURE IN CONTROL CIRCUIT.................................................................................289 TESTING AND ADJUSTING OIL PRESSURE IN PUMP PC CONTROL CIRCUIT...............................................................290 TESTING AND ADJUSTING OIL PRESSURE IN PUMP LS CONTROL CIRCUIT...............................................................293 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............................................................................304 MEASURING OIL LEAKAGE.......................................................................................................305 BLEEDING AIR FROM EACH PART.................................................................................................307 TESTING PROCEDURE OF DIODE..................................................................................................310 SPECIAL FUNCTIONS OF MONITOR PANEL..........................................................................................311 HANDLING OF HIGH-VOLTAGE CIRCUIT OF ENGINE CONTROLLER.......................................................................338 PREPARATION WORK FOR TROUBLESHOOTING FOR ELECTRICAL EQUIPMENT SYSTEM........................................................339 Pm-Clinic Service...........................................................................................................341 TROUBLESHOOTING.................................................................................................................349 POINTS TO REMEMBER WHEN TROUBLESHOOTING.....................................................................................350 SEQUENCE OF EVENTS IN TROUBLESHOOTING.......................................................................................351 POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE............................................................................352 CHECKS BEFORE TROUBLESHOOTING...............................................................................................360 CLASSIFICATION AND STEPS FOR TROUBLESHOOTING................................................................................361 CONNECTOR ARRANGEMENT DRAWING AND ELECTRIC CIRCUIT DIAGRAM OF EACH SYSTEM...................................................365 CONNECTION TABLE FOR CONNECTOR PIN NUMBERS..................................................................................382 T-BRANCH BOX AND T-BRANCH TABLE.............................................................................................404 TROUBLESHOOTING WHEN ERROR CODE “ELECTRICAL SYSTEM” AND FAILURE CODE “MECHANICAL SYSTEM” ARE DISPLAYED......................407 INFORMATION CONTAINED IN TROUBLESHOOTING TABLE..........................................................................410 Error Code in Electrical System [E112] (Short-circuiting in normal rotation system of windshield wiper motor drive).....412 Error Code in Electrical System [E113] (Short-circuiting in reverse rotation system of windshield wiper motor drive)....414 Error Code in Electrical System [E114] (Short-circuiting in window washer drive system).................................416 Error Code in Electrical System [E115] (Abnormal Windshield Wiper Motion)...............................................418 Error Code in Electrical System [E116] (Abnormality in retracting windshield wiper).....................................420 Error Code in Electrical System [E117] (Eng. Controller S-NET Comm. Err.)...............................................422 Error Code in Electrical System [E118] (Pump Controller S-NET Comm. Err.)...............................................424 Error Code in Electrical System [E128] (Monitor Comm. Abnormality)......................................................426 Error Code in Electrical System [E201] (Short-circuiting in travel interlocking solenoid)...............................428 Error Code in Electrical System [E203] (Short-circuiting in swing holding brake solenoid)...............................430 Error Code in Electrical System [E204] (Short-circuiting in merge/divide solenoid)......................................432 Error Code in Electrical System [E205] (Short-circuiting in 2-stage relief solenoid)....................................433 Error Code in Electrical System [E206] (Short-circuiting in travel speed shifting solenoid).............................434 Error Code in Electrical System [E211] (Disconnection in travel interlocking solenoid)..................................435 Error Code in Electrical System [E213] (Disconnection in swing holding brake solenoid)..................................436 Error Code in Electrical System [E214] (Disconnection of merge/divide solenoid).........................................438 Error Code in Electrical System [E215] (Disconnection in 2-stage relief solenoid).......................................439 Error Code in Electrical System [E216] (Disconnection in travel speed shifting solenoid)................................440 Error Code in Electrical System [E217] (Abnormal input model code)......................................................442 Error Code in Electrical System [E218] (S-Net Comm. Disc.)..............................................................444 Error Code in Electrical System [E222] (Short-circuiting in LS-EPC solenoid)............................................446 Error Code in Electrical System [E223] (Disconnection in LS-EPC solenoid system)........................................447 Error Code in Electrical System [E224] (F Pump P. Sensor Abnormality)...................................................448 Error Code in Electrical System [E225] (R Pump P. Sensor Abnormality)...................................................450 Error Code in Electrical System [E226] (Press. Sensor Power Abnormality)................................................452 Error Code in Electrical System [E227] (Abnormality in engine rotation sensor)..........................................454 Error Code in Electrical System [E228] (Short-circuiting in attachment return switching relay)..........................455 Error Code in Electrical System [E232] (Short-circuiting in PC-EPC Solenoid)............................................456 Error Code in Electrical System [E233] (Disconnection in PC-EPC solenoid system)........................................458 Error Code in Electrical System [E238] (Disconnection in attachment return switching relay).............................460 Error Code in Electrical System [E245] (Short-circuiting in attachment oil flow rate adjusting EPC).....................462 Error Code in Electrical System [E246] (Disconnection in attachment oil flow rate adjusting EPC)........................463 Error Code in Electrical System [E247] (Arm IN PPC pressure sensor abnormality).........................................464 Error Code in Electrical System [E248] (Bucket CURL PPC pressure sensor abnormality)....................................466 Error Code in Electrical System [E257] (Pump Abnormality)...............................................................468 Error Code in Electrical System [E315] (Battery Relay Drive S/C)........................................................470 Error Code in Electrical System [E91B] (Engine Ne sensor problem).......................................................472 Error Code in Electrical System [E91C] (Engine G sensor problem)........................................................473 Error Code in Electrical System [E920] (Engine type selection error)....................................................474 Error Code in Electrical System [E921] (Engine type mismatch)...........................................................476 Error Code in Electrical System [E931] (Fuel dial sys. error)...........................................................478 Error Code in Electrical System [E934] (Engine coolant sensor Hi error).................................................480 Error Code in Electrical System [E936] (Engine oil press. sw. error)....................................................482 Error Code in Electrical System [E93C] (Engine boost sensor error)......................................................484 Error Code in Electrical System [E93D] (Engine fuel temp. sensor error).................................................486 Error Code in Electrical System [E953] (Engine Comm. Abnormality).......................................................488 Error Code in Electrical System [E954] (Short engine starter sw.).......................................................490 Error Code in Electrical System [E955] (Engine S-NET error).............................................................492 Error Code in Electrical System [E956] (Engine power failure (1)).......................................................494 Error Code in Electrical System [E957] (Engine power failure (2)).......................................................496 Error Code in Electrical System [E95A] (Engine Q-adj. sw. signal error).................................................498 Error Code in Electrical System [E96A] (Engine coolant sensor Lo error).................................................500 Error Code in Electrical System [E970] (PCV1 over current)..............................................................502 Error Code in Electrical System [E971] (PCV2 over current)..............................................................503 Error Code in Electrical System [E974] (PCV1 line cut)..................................................................504 Error Code in Electrical System [E975] (PCV2 line cut)..................................................................505 Error Code in Electrical System [E977] (Rail press. sensor error).......................................................506 Error Code in Electrical System [E979] (Rail press. high)...............................................................508 Error Code in Electrical System [E97A] (Rail press. abnormal)...........................................................508 Error Code in Electrical System [E97B] (Rail press. low)................................................................509 Error Code in Electrical System [E97C] (Rail press. too low)............................................................511 Error Code in Electrical System [E97D] (Rail press. out of control).....................................................511 Error Code in Electrical System [E980] (Eng. Controller Abnormality)....................................................512 Error Code in Electrical System [E981] (Fuel Injector 1 Disc.)..........................................................514 Error Code in Electrical System [E982] (Fuel Injector 2 Disc.)..........................................................515 Error Code in Electrical System [E983] (Fuel Injector 3 Disc.)..........................................................516 Error Code in Electrical System [E984] (Fuel Injector 4 Disc.)..........................................................517 Error Code in Electrical System [E985] (Fuel Injector 5 Disc.)..........................................................518 Error Code in Electrical System [E986] (Fuel Injector 6 Disc.)..........................................................519 Error Code in Electrical System [E98A] (Fuel Injector 1 – 3 S/C)........................................................520 Error Code in Electrical System [E98B] (Fuel Injector 4 – 6 S/C)........................................................522 Error Code in Mechanical System [A000N1] (Engine high-idling speed out of standard).....................................524 Error Code in Mechanical System [A000N2] (Engine low-idling speed out of standard)......................................524 Failure Code in Mechanical System [AA10NX] (Aircleaner Clogging)........................................................526 Failure Code in Mechanical System [AB00KE] (Charge Voltage Low).........................................................528 Failure Code in Mechanical System [B@BAZG] (Eng. Oil Press. Low)........................................................530 Failure Code in Mechanical System [B@BAZK] (Eng. Oil Level Low).........................................................532 Failure Code in Mechanical System [B@BCNS] (Eng. Water Overheat)........................................................533 Failure Code in Mechanical System [B@BCZK] (Eng. Water Lvl Low).........................................................534 Failure Code in Mechanical System [B@HANS] (Hydr. Oil Overheat).........................................................535 TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE)...............................................................................537 INFORMATION CONTAINED IN TROUBLESHOOTING TABLE..........................................................................539 E-1 The engine does not start (The engine does not rotate)..............................................................540 E-2 Preheater does not operate..........................................................................................544 E-3 Auto engine warm-up device does not work............................................................................546 E-4 Auto-decelerator does not operate...................................................................................547 E-5 All work equipment, swing and travel do not move....................................................................548 E-6 One-touch power max. function does not operate......................................................................550 E-7 Machine push-up function does not operate normally..................................................................551 E-8 Attachment circuit does not change..................................................................................553 E-9 No display in monitor panel at all..................................................................................555 E-10 Part of display on monitor panel is missing........................................................................556 E-11 Monitor panel displays contents irrelevant to the model............................................................556 E-12 Fuel level monitor red lamp lights up while engine is running......................................................557 E-13 Engine water temperature gauge does not display correctly..........................................................558 E-14 Hydraulic oil temperature gauge does not display correctly.........................................................560 E-15 Fuel gauge does not display correctly..............................................................................561 E-16 Swing lock monitor does not display correctly......................................................................562 E-17 When monitor switch is operated, nothing is displayed..............................................................564 E-18 Windshield wiper and window washer do not work.....................................................................566 E-19 Alarm buzzer cannot be cancelled...................................................................................570 E-20 “Boom RAISE” is not correctly displayed in monitor function........................................................571 E-21 “Boom LOWER” is not correctly displayed in monitor function........................................................572 E-22 “Arm IN” is not displayed normally in monitoring function..........................................................573 E-23 “Arm DUMPING” is not correctly displayed in monitor function.......................................................574 E-24 “Bucket CURL” is not displayed normally in monitoring function.....................................................575 E-25 “Bucket DUMPING” is not correctly displayed in monitor function....................................................576 E-26 “Swing” is not displayed normally in monitoring function...........................................................578 E-27 “TRAVEL” is not correctly displayed in monitor function............................................................580 E-28 “Travel Differential Pressure” is not correctly displayed in monitor function......................................582 E-29 “Service” is not correctly displayed in monitor function...........................................................584 E-30 Travel alarm does not sound or does not stop sounding..............................................................586 TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (H MODE).................................................................589 SYSTEM CHART FOR HYDRAULIC AND MECHANICAL SYSTEM........................................................................590 INFORMATION CONTAINED IN TROUBLESHOOTING TABLE..........................................................................592 H-1 All work equipment lack power, or travel and swing speeds are slow..................................................593 H-2 Engine speed sharply drops or engine stalls.........................................................................594 H-3 No work equipment, travel or swing move.............................................................................595 H-4 Abnormal noise is heard from around hydraulic pump..................................................................595 H-5 Auto-decelerator does not work......................................................................................596 H-6 Fine control mode does not function.................................................................................596 H-7 Boom moves slowly or lacks power....................................................................................597 H-8 Arm moves slowly or lacks power.....................................................................................598 H-9 Bucket moves slowly or lacks power..................................................................................599 H-10 Work equipment does not move in its single operation...............................................................599 H-11 Work equipment has a bit too fast hydraulic drift..................................................................600 H-12 Work equipment has big time lag....................................................................................601 H-13 Other work equipment moves when relieving single circuit...........................................................601 H-14 One-touch power max. function does not work........................................................................601 H-15 Machine push-up function does not work.............................................................................602 H-16 In compound operation, work equipment with larger load moves slowly................................................603 H-17 In swing + boom RAISE operation, boom moves slowly.................................................................603 H-18 In swing + travel, travel speed drops sharply......................................................................603 H-19 Machine swerves in travel..........................................................................................604 H-20 Machine travels slowly.............................................................................................605 H-21 Machine cannot be easily steered or lacks power....................................................................606 H-22 Travel speed does not shift, or it is slower or faster than preset speed...........................................607 H-23 Track shoe does not turn (on one side only)........................................................................608 H-24 Machine does not swing.............................................................................................609 H-25 Swing acceleration is poor, or swing speed is slow.................................................................610 H-26 Excessive overrun when stopping swing..............................................................................611 H-27 There is big shock when stopping swing.............................................................................612 H-28 There is big abnormal noise caused when stopping swing.............................................................612 H-29 Swing natural drift is too big.....................................................................................613 H-30 Attachment circuit does not change.................................................................................614 H-31 Flow rate in attachment circuit cannot be adjusted.................................................................614 TROUBLESHOOTING OF ENGINE (S MODE)..........................................................................................615 POINTS TO REMEMBER WHEN TROUBLESHOOTING.................................................................................616 METHOD OF USING TROUBLESHOOTING CHARTS..................................................................................617 S-1 Starting performance is poor (starting always takes time)...........................................................620 S-2 Engine does not start...............................................................................................621 S-3 Engine does not pick up smoothly (follow-up is poor)................................................................624 S-4 Engine stops during operations......................................................................................625 S-5 Engine does not rotate smoothly (hunting)...........................................................................626 S-6 Engine lacks output (or lacks power)................................................................................627 S-7 Exhaust smoke is black (incomplete combustion)......................................................................628 S-8 Oil consumption is excessive (or exhaust smoke is blue).............................................................629 S-9 Oil becomes contaminated quickly....................................................................................630 S-10 Fuel consumption is excessive......................................................................................631 S-11 Oil is in cooling water (or water spurts back, or water level goes down)...........................................632 S-12 Oil pressure caution lamp lights up (drop in oil pressure).........................................................633 S-13 Oil level rises (water, fuel in oil)...............................................................................634 S-14 Water temperature becomes too high (overheating)...................................................................635 S-15 Abnormal noise is made.............................................................................................636 S-16 Vibration is excessive.............................................................................................637 30 DISASSEMBLY AND ASSEMBLY.........................................................................................................639 HOW TO READ THIS MANUAL.........................................................................................................640 PRECAUTIONS WHEN PERFORMING OPERATION...........................................................................................642 SPECIAL TOOL LIST...............................................................................................................644 REMOVAL AND INSTALLATION OF CYLINDER HEAD ASSEMBLY..............................................................................651 REMOVAL AND INSTALLATION OF ENGINE REAR SEAL....................................................................................658 REMOVAL AND INSTALLATION OF ENGINE FRONT SEAL...................................................................................662 REMOVAL AND INSTALLATION OF FUEL SUPPLY PUMP ASSEMBLY...........................................................................665 REMOVAL AND INSTALLATION OF FUEL INJECTOR ASSEMBLY..............................................................................668 REMOVAL AND INSTALLATION OF NOZZLE TIP..........................................................................................671 REMOVAL AND INSTALLATION OF STARTING MOTOR ASSEMBLY.............................................................................673 REMOVAL AND INSTALLATION OF RADIATOR ASSEMBLY...................................................................................674 REMOVAL AND INSTALLATION OF HYDRAULIC OIL COOLER ASSEMBLY.......................................................................676 REMOVAL AND INSTALLATION OF ENGINE AND HYDRAULIC PUMP ASSEMBLY..................................................................678 REMOVAL AND INSTALLATION OF SWING CIRCLE ASSEMBLY...............................................................................683 REMOVAL AND INSTALLATION OF SWING MOTOR AND SWING MACHINERY ASSEMBLY............................................................684 DISASSEMBLY AND ASSEMBLY OF SWING MOTOR AND SWING MACHINERY ASSEMBLY............................................................685 REMOVAL AND INSTALLATION OF SPROCKET............................................................................................692 REMOVAL AND INSTALLATION OF TRAVEL MOTOR AND FINAL DRIVE ASSEMBLY...............................................................693 DISASSEMBLY AND ASSEMBLY OF FINAL DRIVE ASSEMBLY................................................................................694 DISASSEMBLY AND ASSEMBLY OF CARRIER ROLLER ASSEMBLY.............................................................................701 DISASSEMBLY AND ASSEMBLY OF TRACK ROLLER ASSEMBLY...............................................................................703 DISASSEMBLY AND ASSEMBLY OF IDLER ASSEMBLY......................................................................................704 DISASSEMBLY AND ASSEMBLY OF RECOIL SPRING ASSEMBLY..............................................................................707 EXPANSION AND INSTALLATION OF TRACK SHOE ASSEMBLY...............................................................................709 REMOVAL AND INSTALLATION OF OPERATOR’S CAB......................................................................................711 REMOVAL AND INSTALLATION OF PUMP CONTROLLER.....................................................................................714 REMOVAL AND INSTALLATION OF REVOLVING FRAME ASSEMBLY............................................................................715 REMOVAL AND INSTALLATION OF COUNTERWEIGHT ASSEMBLY..............................................................................718 REMOVAL AND INSTALLATION OF HYDRAULIC TANK ASSEMBLY.............................................................................719 REMOVAL AND INSTALLATION OF HYDRAULIC PUMP ASSEMBLY.............................................................................721 REMOVAL AND INSTALLATION OF OIL SEAL IN HYDRAULIC PUMP INPUT SHAFT..............................................................724 REMOVAL AND INSTALLATION OF CONTROL VALVE ASSEMBLY..............................................................................725 DISASSEMBLY AND ASSEMBLY OF CONTROL VALVE ASSEMBLY..............................................................................728 REMOVAL AND INSTALLATION OF CENTER SWIVEL JOINT ASSEMBLY........................................................................732 DISASSEMBLY AND ASSEMBLY OF OF CENTER SWIVEL JOINT ASSEMBLY.....................................................................734 DISASSEMBLY AND ASSEMBLY OF WORK EQUIPMENT PPC VELVE ASSEMBLY...................................................................735 DISASSEMBLY AND ASSEMBLY OF TRAVEL PPC VALVE ASSEMBLY...........................................................................736 DISASSEMBLY AND ASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLY.........................................................................737 REMOVAL AND INSTALLATION OF WORK EQUIPMENT ASSEMBLY.............................................................................742 REMOVAL AND INSTALLATION OF OPERATOR’S CAB GLASS (STUCK GLASS)..................................................................745 REMOVAL AND INSTALLATION OF FRONT WINDOW ASSEMBLY...............................................................................755 70 SUPPLEMENT FOR OFF-SET BOOM EXCAVATOR............................................................................................761 SPECIFICATION DRAWINGS..........................................................................................................762 SPECIFICATIONS..................................................................................................................763 WEIGHT TABLE....................................................................................................................764 TESTING AND ADJUSTING...........................................................................................................766 TROUBLESHOOTING.................................................................................................................767 MAINTENANCE STANDARD............................................................................................................769 90 OTHERS...........................................................................................................................779 HYDRAULIC CIRCUIT DIAGRAM (1/2).................................................................................................781 HYDRAULIC CIRCUIT DIAGRAM (2/2).................................................................................................783 ELECTRICAL CIRCUIT DIAGRAM (1/5) (EXTREME COLD SPEC.)...........................................................................785 ELECTRICAL CIRCUIT DIAGRAM (2/5) (EXTREME COLD SPEC.)...........................................................................787 ELECTRICAL CIRCUIT DIAGRAM (3/5) (EXTREME COLD SPEC.)...........................................................................789 ELECTRICAL CIRCUIT DIAGRAM (4/5) (EXTREME COLD SPEC.)...........................................................................791 ELECTRICAL CIRCUIT DIAGRAM (5/5) (EXTREME COLD SPEC.)...........................................................................793
DESCRIPTION:
KOMATSU PC400-7 PC400LC-7 SHOP MANUAL SEBM037603 – PDF DOWNLOAD
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 27/12/24
