Trusted Business
Verified & Licensed
Virus Free Files
100% Safe Downloads
Secure Payment
SSL Protected
Instant Delivery
Available Immediately
KOMATSU PC450-7K PC450LC-7K SHOP MANUAL UEBM002300 – PDF DOWNLOAD
$32.95
KOMATSU PC450-7K PC450LC-7K SHOP MANUAL UEBM002300 – PDF DOWNLOAD
Instant PDF Download
Available immediately
Save to Your Device
Download & keep forever
Antivirus Scanned
100% virus-free
Trusted Worldwide
175,000+ customers
Description
KOMATSU PC450-7K PC450LC-7K SHOP MANUAL UEBM002300 – PDF DOWNLOAD
FILE DETAILS:
KOMATSU PC450-7K PC450LC-7K SHOP MANUAL UEBM002300 – PDF DOWNLOAD
Language : English
Pages : 766
Downloadable : Yes
File Type : PDF
IMAGES PREVIEW OF THE MANUAL:
TABLE OF CONTENTS:
KOMATSU PC450-7K PC450LC-7K SHOP MANUAL UEBM002300 – PDF DOWNLOAD
COVER............................................................................................................... 1 CONTENTS........................................................................................................ 2 Foreword.pdf........................................................................................................ 0 SAFETY.......................................................................................................... 3 SAFETY NOTICE............................................................................................... 3 FOREWORD........................................................................................................ 5 GENERAL..................................................................................................... 5 HOW TO READ THE SHOP MANUAL................................................................................. 6 HOISTING INSTRUCTIONS....................................................................................... 7 METHOD OF DISASSEMBLING, CONNECTING PUSH-PULL TYPE COUPLER.................................................. 8 COATING MATERIALS........................................................................................... 10 STANDARD TIGHTENING TORQUE.................................................................................. 12 ELECTRIC WIRE CODE.......................................................................................... 15 CONVERSION TABLE............................................................................................ 16 UNITS....................................................................................................... 22 01.pdf.............................................................................................................. 0 01 GENERAL...................................................................................................... 23 SPECIFICATION DRAWINGS...................................................................................... 24 SPECIFICATIONS.............................................................................................. 26 WEIGHT TABLE................................................................................................ 28 FUEL, COOLANT AND LUBRICANTS................................................................................ 30 10SERVER.pdf........................................................................................................ 0 10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD................................................................. 31 ENGINE RELATED PARTS........................................................................................ 32 RADIATOR•OIL COOLER•AFTERCOOLER......................................................................... 33 POWER TRAIN................................................................................................. 34 FINAL DRIVE................................................................................................. 36 SWING MACHINERY............................................................................................. 38 SWING CIRCLE................................................................................................ 40 TRACK FRAME AND RECOIL SPRING............................................................................... 42 IDLER....................................................................................................... 44 CARRIER ROLLER.............................................................................................. 46 TRACK ROLLER................................................................................................ 47 TRACK SHOE.................................................................................................. 48 HYDRAULIC PIPING DRAWING.................................................................................... 52 HYDRAULIC TANK.............................................................................................. 54 HYDRAULIC PUMP.............................................................................................. 56 LS(pc)-EPC VALVE............................................................................................ 74 variable volume valve....................................................................................... 77 CONTROL VALVE............................................................................................... 80 MAIN RELIEF VALVE........................................................................................... 94 CLSS........................................................................................................ 96 SELF PRESSURE REDUCING VALVE................................................................................ 99 SWING MOTOR.................................................................................................102 CENTER SWIVEL JOINT.........................................................................................110 TRAVEL MOTOR................................................................................................112 TRAVEL JUNCTION VALVE.......................................................................................123 VALVE CONTROL...............................................................................................125 TRAVEL PPC SHUTTLE VALVE....................................................................................126 WORK EQUIPMENT • SWING PPC VALVE............................................................................130 TRAVEL PPC VALVE............................................................................................134 SERVICE PPC VALVE...........................................................................................141 SOLENOID VALVE..............................................................................................142 PPC ACCUMULATOR.............................................................................................144 return oil filter...........................................................................................145 quick return valve..........................................................................................146 LIFT CHECK VALVE............................................................................................148 attachment circuit selector valve...........................................................................149 HOLDING VALVE...............................................................................................151 HYDRAULIC CYLINDER..........................................................................................156 WORK EQUIPMENT..............................................................................................158 AIR CONDITIONER.............................................................................................164 ENGINE CONTROL..............................................................................................165 ELECTRONIC CONTROL SYSTEM...................................................................................171 MONITOR SYSTEM..............................................................................................198 SENSOR......................................................................................................218 20_001.pdf.......................................................................................................... 0 20 TESTING AND ADJUSTING........................................................................................221 STANDARD VALUE TABLE FOR ENGINE.............................................................................222 STANDARD VALUE TABLE FOR CHASSIS............................................................................223 20_101.pdf.......................................................................................................... 0 TESTING AND ADJUSTING...........................................................................................233 Testing, adjusting, and troubleshooting tools table.........................................................234 Measuring engine speed......................................................................................236 Measuring intake air pressure (boost pressure)..............................................................237 Measuring exhaust temperature...............................................................................238 Measuring exhaust gas color.................................................................................239 Adjusting valve clearance...................................................................................240 Measuring compression pressure..............................................................................242 Measuring blow-by pressure..................................................................................244 Measuring engine oil pressure...............................................................................245 Handling of fuel system devices.............................................................................246 Releasing residual pressure from fuel system................................................................246 Measuring fuel pressure.....................................................................................247 Bleeding air from fuel circuit..............................................................................248 Inspection of fuel circuit for leakage......................................................................250 Adjusting engine speed sensor...............................................................................251 Testing and adjusting fan belt and alternator belt tension..................................................252 Testing and adjusting air conditioner compressor belt tension...............................................253 Measuring clearance of swing circle bearing.................................................................254 Testing and adjusting track shoe tension....................................................................255 Testing and adjusting oil pressure in work equipment, swing, and travel circuits............................256 Measuring basic pressure in control circuit.................................................................260 Testing and adjusting oil pressure in pump PC control circuit...............................................261 Testing and adjusting oil pressure in pump LS control circuit...............................................264 Measuring solenoid valve output pressure....................................................................269 Measuring PPC valve output pressure.........................................................................272 Adjusting play of work equipment and swing PPC valves.......................................................274 Testing parts which cause hydraulic drift of work equipment.................................................275 Releasing residual pressure in hydraulic circuit............................................................277 Measuring oil leakage.......................................................................................200 Bleeding air from each part.................................................................................281 Testing procedure of diode..................................................................................284 Special functions of monitor panel..........................................................................200 Ordinary functions and special functions of monitor panel...............................................286 Operation and display of Operator’s Menu (Outline)......................................................287 Table for Error and Failure Code Nos....................................................................292 Operation and display of Service Menu...................................................................295 Monitoring items list...................................................................................202 Handling of high-voltage circuit of engine controller.......................................................312 Preparation work for troubleshooting for electrical equipment system........................................203 20_101a.pdf......................................................................................................... 0 Pm-CLINIC SERVICE...............................................................................................315 Pm-CLINIC SERVICE PC450 (LC)-7..................................................................................320 UNDERCARRIAGE INSPECTION........................................................................................321 20_201.pdf.......................................................................................................... 0 TROUBLESHOOTING.................................................................................................233 POINTS TO REMEMBER WHEN TROUBLESHOOTING.....................................................................324 SEQUENCE OF EVENTS IN TROUBLESHOOTING.......................................................................320 POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE............................................................326 CHECKS BEFORE TROUBLESHOOTING...............................................................................334 CLASSIFICATION AND STEPS FOR TROUBLESHOOTING................................................................335 Classification of troubleshooting.......................................................................335 Steps for troubleshooting...............................................................................335 Phenomena considered to be failures and troubleshooting Nos.............................................336 Connector arrangement drawing and electric circuit diagram of each system...................................339 Connectors list.........................................................................................339 Connector Location Stereogram...........................................................................344 Monitor Panel System Circuit Diagram (M Circuit)........................................................350 Engine Control System Circuit Diagram (E Ciruit)........................................................352 Pump Controller System Circuit Diagram (P Circuit)......................................................354 CONNECTION TABLE FOR CONNECTOR PIN NUMBERS..................................................................356 T-BRANCH BOX AND T-BRANCH TABLE.............................................................................378 20_301.pdf.......................................................................................................... 0 TROUBLESHOOTING WHEN ERROR CODE “ELECTRICAL SYSTEM” AND FAILURE CODE “MECHANICAL SYSTEM” ARE DISP...............381 INFORMATION CONTAINED IN TROUBLESHOOTING TABLE..............................................................384 Error Code in Electrical System [E112] (Short-circuiting in normal rotation system of windshield .......386 Error Code in Electrical System [E113] (Short-circuiting in reverse rotation system of windshield.......388 Error Code in Electrical System [E114] (Short-circuiting in window washer drive system).................390 Error Code in Electrical System [E115] (Abnormal Windshield Wiper Motion)...............................392 Error Code in Electrical System [E116] (Abnormality in retracting windshield wiper).....................394 Error Code in Electrical System [E117] (Eng. Controller S-NET Comm. Err.)...............................396 Error Code in Electrical System [E118] (Pump Controller S-NET Comm. Err.)...............................398 Error Code in Electrical System [E128] (Monitor Comm. Abnormality)......................................400 Error Code in Electrical System [E201] (Short-circuiting in travel interlocking solenoid)...............402 Error Code in Electrical System [E203] (Short-circuiting in swing holding brake solenoid)...............404 Error Code in Electrical System [E204] (Short-circuiting in merge/divide solenoid)......................406 Error Code in Electrical System [E205] (Short-circuiting in 2-stage relief solenoid)....................407 Error Code in Electrical System [E206] (Short-circuiting in travel speed shifting solenoid).............408 Error Code in Electrical System [E211] (Disconnection in travel interlocking solenoid)..................409 Error Code in Electrical System [E213] (Disconnection in swing holding brake solenoid)..................410 Error Code in Electrical System [E214] (Disconnection of merge/divide solenoid).........................412 Error Code in Electrical System [E215] (Disconnection in 2-stage relief solenoid).......................413 Error Code in Electrical System [E216] (Disconnection in travel speed shifting solenoid)................414 Error Code in Electrical System [E217] (Abnormal input model code)......................................416 Error Code in Electrical System [E218] (S-Net Comm. Disc.)..............................................418 Error Code in Electrical System [E222] (Short-circuiting in LS-EPC solenoid)............................420 Error Code in Electrical System [E223] (Disconnection in LS-EPC solenoid system)........................421 Error Code in Electrical System [E224] (F Pump P. Sensor Abnormality)...................................422 Error Code in Electrical System [E225] (R Pump P. Sensor Abnormality)...................................424 Error Code in Electrical System [E226] (Press. Sensor Power Abnormality)................................426 Error Code in Electrical System [E227] (Abnormality in engine rotation sensor)..........................428 Error Code in Electrical System [E228] (Short-circuiting in attachment return switching relay)..........429 Error Code in Electrical System [E232] (Short-circuiting in PC-EPC Solenoid)............................430 Error Code in Electrical System [E233] (Disconnection in PC-EPC solenoid system)........................432 Error Code in Electrical System [E238] (Disconnection in attachment return switching relay).............434 Error Code in Electrical System [E245] (Short-circuiting in attachment oil flow rate adjusting EPC).....436 Error Code in Electrical System [E246] (Disconnection in attachment oil flow rate adjusting EPC)........437 Error Code in Electrical System [E247] (Arm IN PPC pressure sensor abnormality).........................438 Error Code in Electrical System [E248] (Bucket CURL PPC pressure sensor abnormality)....................440 Error Code in Electrical System [E257] (Pump Abnormality)...............................................442 Error Code in Electrical System [E315] (Battery Relay Drive S/C)........................................444 Error Code in Electrical System [E91B] (Engine Ne sensor problem).......................................446 Error Code in Electrical System [E91C] (Engine G sensor problem)........................................447 Error Code in Electrical System [E920] (Engine type selection error)....................................448 Error Code in Electrical System [E921] (Engine type mismatch)...........................................450 Error Code in Electrical System [E931] (Fuel dial sys. error)...........................................452 Error Code in Electrical System [E934] (Engine coolant sensor Hi error).................................454 Error Code in Electrical System [E936] (Engine oil press. sw. error)....................................456 Error Code in Electrical System [E93C] (Engine boost sensor error)......................................458 Error Code in Electrical System [E93D] (Engine fuel temp. sensor error).................................460 Error Code in Electrical System [E953] (Engine Comm. Abnormality).......................................462 Error Code in Electrical System [E954] (Short engine starter sw.).......................................464 Error Code in Electrical System [E955] (Engine S-NET error).............................................466 Error Code in Electrical System [E956] (Engine power failure (1)).......................................468 Error Code in Electrical System [E957] (Engine power failure (2)).......................................470 Error Code in Electrical System [E95A] (Engine Q-adj. sw. signal error).................................472 Error Code in Electrical System [E96A] (Engine coolant sensor Lo error).................................474 Error Code in Electrical System [E970] (PCV1 over current)..............................................476 Error Code in Electrical System [E971] (PCV2 over current)..............................................477 Error Code in Electrical System [E974] (PCV1 line cut)..................................................478 Error Code in Electrical System [E975] (PCV2 line cut)..................................................479 Error Code in Electrical System [E977] (Rail press. sensor error).......................................480 Error Code in Electrical System [E979] (Rail press. high)...............................................482 Error Code in Electrical System [E97A] (Rail press. abnormal)...........................................482 Error Code in Electrical System [E97B] (Rail press. low)................................................483 Error Code in Electrical System [E97C] (Rail press. too low)............................................485 Error Code in Electrical System [E97D] (Rail press. out of control).....................................485 Error Code in Electrical System [E980] (Eng. Controller Abnormality)....................................486 Error Code in Electrical System [E981] (Fuel Injector 1 Disc.)..........................................488 Error Code in Electrical System [E982] (Fuel Injector 2 Disc.)..........................................489 Error Code in Electrical System [E983] (Fuel Injector 3 Disc.)..........................................490 Error Code in Electrical System [E984] (Fuel Injector 4 Disc.)..........................................491 Error Code in Electrical System [E985] (Fuel Injector 5 Disc.)..........................................492 Error Code in Electrical System [E986] (Fuel Injector 6 Disc.)..........................................493 Error Code in Electrical System [E98A] (Fuel Injector 1 – 3 S/C)........................................494 Error Code in Electrical System [E98B] (Fuel Injector 4 – 6 S/C)........................................496 Error Code in Mechanical System [A000N1] (Engine high-idling speed out of standard).....................498 Error Code in Mechanical System [A000N2] (Engine low-idling speed out of standard)......................498 Failure Code in Mechanical System [AA10NX] (Aircleaner Clogging)........................................500 Failure Code in Mechanical System [AB00KE] (Charge Voltage Low).........................................502 Failure Code in Mechanical System [B@BAZG] (Eng. Oil Press. Low)........................................504 Failure Code in Mechanical System [B@BAZK] (Eng. Oil Level Low).........................................506 Failure Code in Mechanical System [B@BCNS] (Eng. Water Overheat)........................................507 Failure Code in Mechanical System [B@BCZK] (Eng. Water Lvl Low).........................................508 Failure Code in Mechanical System [B@HANS] (Hydr. Oil Overheat).........................................509 20_501.pdf.......................................................................................................... 0 TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE)...................................................................381 Before carrying out troubleshooting for electrical system (E-mode)..........................................512 INFORMATION CONTAINED IN TROUBLESHOOTING TABLE..............................................................513 E-1 The engine does not start (The engine does not rotate)..............................................514 E-2 Preheater does not operate..........................................................................518 E-3 Auto engine warm-up device does not work............................................................520 E-4 Auto-decelerator does not operate...................................................................521 E-5 All work equipment, swing and travel do not move....................................................522 E-6 One-touch power max. function does not operate......................................................524 E-7 Machine push-up function does not operate normally..................................................525 E-8 Attachment circuit does not change..................................................................527 E-9 No display in monitor panel at all..................................................................529 E-10 Part of display on monitor panel is missing........................................................530 E-11 Monitor panel displays contents irrelevant to the model............................................530 E-12 Fuel level monitor red lamp lights up while engine is running......................................531 E-13 Engine water temperature gauge does not display correctly..........................................532 E-14 Hydraulic oil temperature gauge does not display correctly.........................................534 E-15 Fuel gauge does not display correctly..............................................................416 E-16 Swing lock monitor does not display correctly......................................................536 E-17 When monitor switch is operated, nothing is displayed..............................................538 E-18 Windshield wiper and window washer do not work.....................................................540 E-19 Alarm buzzer cannot be cancelled...................................................................544 E-20 “Boom RAISE” is not correctly displayed in monitor function........................................545 E-21 “Boom LOWER” is not correctly displayed in monitor function........................................546 E-22 “Arm IN” is not displayed normally in monitoring function..........................................547 E-23 “Arm DUMPING” is not correctly displayed in monitor function.......................................548 E-24 “Bucket CURL” is not displayed normally in monitoring function.....................................549 E-25 “Bucket DUMPING” is not correctly displayed in monitor function....................................550 E-26 “Swing” is not displayed normally in monitoring function...........................................552 E-27 “TRAVEL” is not correctly displayed in monitor function............................................554 E-28 “Travel Differential Pressure” is not correctly displayed in monitor function......................556 E-29 “Service” is not correctly displayed in monitor function...........................................558 E-30 Travel alarm does not sound or does not stop sounding..............................................560 E-32 TROUBLESHOOTING FOR AIR CONDITIONER SYSTEM.........................................................562 Troubleshooting by failure phenomenon...................................................................569 20_601.pdf.......................................................................................................... 0 TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (H MODE).....................................................381 system chart for hydraulic and mechanical system............................................................574 INFORMATION CONTAINED IN TROUBLESHOOTING TABLE..............................................................576 H-1 All work equipment lack power, or travel and swing speeds are slow..................................577 H-2 Engine speed sharply drops or engine stalls.........................................................550 H-3 No work equipment, travel or swing move.............................................................558 H-4 Abnormal noise is heard from around hydraulic pump..................................................579 H-5 Auto-decelerator does not work......................................................................580 H-6 Fine control mode does not function.................................................................580 H-7 Boom moves slowly or lacks power....................................................................581 H-8 Arm moves slowly or lacks power.....................................................................567 H-9 Bucket moves slowly or lacks power..................................................................570 H-10 Work equipment does not move in its single operation...............................................583 H-11 Work equipment has a bit too fast hydraulic drift..................................................584 H-12 Work equipment has big time lag....................................................................585 H-13 Other work equipment moves when relieving single circuit...........................................585 H-14 One-touch power max. function does not work........................................................585 H-15 Machine push-up function does not work.............................................................586 H-16 In compound operation, work equipment with larger load moves slowly................................587 H-17 In swing + boom RAISE operation, boom moves slowly.................................................587 H-18 In swing + travel, travel speed drops sharply......................................................587 H-19 Machine swerves in travel..........................................................................588 H-20 Machine travels slowly.............................................................................589 H-21 Machine cannot be easily steered or lacks power....................................................590 H-22 Travel speed does not shift, or it is slower or faster than preset speed...........................591 H-23 Track shoe does not turn (on one side only)........................................................592 H-24 Machine does not swing.............................................................................593 H-25 Swing acceleration is poor, or swing speed is slow.................................................594 H-26 Excessive overrun when stopping swing..............................................................595 H-27 There is big shock when stopping swing.............................................................596 H-28 There is big abnormal noise caused when stopping swing.............................................596 H-29 Swing natural drift is too big.....................................................................597 H-30 Attachment circuit does not change.................................................................598 H-31 Flow rate in attachment circuit cannot be adjusted.................................................598 20_701.pdf.......................................................................................................... 0 TROUBLESHOOTING OF ENGINE (S MODE)..............................................................................381 POINTS TO REMEMBER WHEN TROUBLESHOOTING.....................................................................600 METHOD OF USING TROUBLESHOOTING CHARTS......................................................................521 S-1 Starting performance is poor (starting always takes time)...........................................604 S-2 Engine does not start...............................................................................605 S-3 Engine does not pick up smoothly (follow-up is poor)................................................608 S-4 Engine stops during operations......................................................................521 S-5 Engine does not rotate smoothly (hunting)...........................................................610 S-6 Engine lacks output (or lacks power)................................................................611 S-7 Exhaust smoke is black (incomplete combustion)......................................................612 S-8 Oil consumption is excessive (or exhaust smoke is blue).............................................613 S-9 Oil becomes contaminated quickly....................................................................614 S-10 Fuel consumption is excessive......................................................................615 S-11 Oil is in cooling water (or water spurts back, or water level goes down)...........................616 S-12 Oil pressure caution lamp lights up (drop in oil pressure).........................................522 S-13 Oil level rises (water, fuel in oil)...............................................................618 S-14 Water temperature becomes too high (overheating)...................................................619 S-15 Abnormal noise is made.............................................................................620 S-16 Vibration is excessive.............................................................................621 SEC_30SERVER.pdf.................................................................................................... 0 30 DISASSEMBLY AND ASSEMBLY.....................................................................................623 HOW TO READ THIS MANUAL.....................................................................................624 REMOVAL AND INSTALLATION OF ASSEMBLIES..................................................................624 DISASSEMBLY AND ASSEMBLY OF ASSEMBLIES..................................................................625 PRECAUTIONS WHEN PERFORMING OPERATION.......................................................................626 SPECIAL TOOL LIST...........................................................................................628 REMOVAL AND INSTALLATION OF CYLINDER HEAD ASSEMBLY..........................................................635 REMOVAL AND INSTALLATION OF ENGINE REAR SEAL................................................................642 REMOVAL AND INSTALLATION OF ENGINE FRONT SEAL...............................................................646 REMOVAL AND INSTALLATION OF FUEL SUPPLY PUMP ASSEMBLY.......................................................649 REMOVAL AND INSTALLATION OF FUEL INJECTOR ASSEMBLY..........................................................652 REMOVAL AND INSTALLATION OF NOZZLE TIP......................................................................655 REMOVAL AND INSTALLATION OF STARTING MOTOR ASSEMBLY.........................................................657 REMOVAL AND INSTALLATION OF RADIATOR ASSEMBLY...............................................................658 REMOVAL AND INSTALLATION OF HYDRAULIC OIL COOLER ASSEMBLY...................................................660 REMOVAL AND INSTALLATION OF ENGINE AND HYDRAULIC PUMP ASSEMBLY..............................................662 REMOVAL AND INSTALLATION OF SWING CIRCLE ASSEMBLY...........................................................667 REMOVAL AND INSTALLATION OF SWING MOTOR AND SWING MACHINERY ASSEMBLY........................................668 DISASSEMBLY AND ASSEMBLY OF SWING MOTOR AND SWING MACHINERY ASSEMBLY........................................669 REMOVAL AND INSTALLATION OF SPROCKET........................................................................676 REMOVAL AND INSTALLATION OF TRAVEL MOTOR AND FINAL DRIVE ASSEMBLY...........................................677 DISASSEMBLY AND ASSEMBLY OF FINAL DRIVE ASSEMBLY............................................................678 DISASSEMBLY AND ASSEMBLY OF CARRIER ROLLER ASSEMBLY.........................................................685 DISASSEMBLY AND ASSEMBLY OF TRACK ROLLER ASSEMBLY...........................................................687 DISASSEMBLY AND ASSEMBLY OF IDLER ASSEMBLY..................................................................688 DISASSEMBLY AND ASSEMBLY OF RECOIL SPRING ASSEMBLY..........................................................691 EXPANSION AND INSTALLATION OF TRACK SHOE ASSEMBLY...........................................................693 REMOVAL AND INSTALLATION OF AIR CONDITIONER UNIT ASSEMBLY...................................................695 REMOVAL AND INSTALLATION OF OPERATOR’S CAB..................................................................697 REMOVAL AND INSTALLATION OF MONITOR ASSEMBLY................................................................700 REMOVAL AND INSTALLATION OF PUMP CONTROLLER.................................................................701 REMOVAL AND INSTALLATION OF ENGINE CONTROLLER...............................................................702 REMOVAL AND INSTALLATION OF REVOLVING FRAME ASSEMBLY........................................................703 REMOVAL AND INSTALLATION OF COUNTERWEIGHT ASSEMBLY..........................................................706 REMOVAL AND INSTALLATION OF HYDRAULIC TANK ASSEMBLY.........................................................707 REMOVAL AND INSTALLATION OF HYDRAULIC PUMP ASSEMBLY.........................................................709 REMOVAL AND INSTALLATION OF OIL SEAL IN HYDRAULIC PUMP INPUT SHAFT..........................................712 REMOVAL AND INSTALLATION OF CONTROL VALVE ASSEMBLY..........................................................713 DISASSEMBLY AND ASSEMBLY OF CONTROL VALVE ASSEMBLY..........................................................716 REMOVAL AND INSTALLATION OF CENTER SWIVEL JOINT ASSEMBLY....................................................720 DISASSEMBLY AND ASSEMBLY OF of CENTER SWIVEL JOINT ASSEMBLY.................................................722 DISASSEMBLY AND ASSEMBLY OF WORK EQUIPMENT PPC VALVE ASSEMBLY...............................................723 DISASSEMBLY AND ASSEMBLY OF TRAVEL PPC VALVE ASSEMBLY.......................................................724 DISASSEMBLY AND ASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLY.....................................................725 REMOVAL AND INSTALLATION OF WORK EQUIPMENT ASSEMBLY.........................................................730 REMOVAL AND INSTALLATION OF OPERATOR’S CAB GLASS (STUCK GLASS)..............................................733 REMOVAL AND INSTALLATION OF FRONT WINDOW ASSEMBLY...........................................................743 90.pdf.............................................................................................................. 0 90 OTHERS....................................................................................................... 23 90-01.pdf........................................................................................................... 0 HYDRAULIC CIRCUIT DIAGRAM (1/2).................................................................................751 HYDRAULIC CIRCUIT DIAGRAM (2/2).................................................................................753 ELECTRICAL CIRCUIT DIAGRAM (1/5)................................................................................755 ELECTRICAL CIRCUIT DIAGRAM (2/5)................................................................................757 ELECTRICAL CIRCUIT DIAGRAM (3/5)................................................................................759 ELECTRICAL CIRCUIT DIAGRAM (4/5)................................................................................761 ELECTRICAL CIRCUIT DIAGRAM (5/5)................................................................................763 90-02.pdf........................................................................................................... 0 AIR CONDITIONER ELECTRICAL CIRCUIT..............................................................................765
DESCRIPTION:
KOMATSU PC450-7K PC450LC-7K SHOP MANUAL UEBM002300 – 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 26/12/24
