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KOMATSU PC138US -8 PC138USLC-8 HYDRAULIC EXCAVATOR SERVICE REPAIR MANUAL (PC138USLC- 20001 and up) – PDF DOWNLOAD
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- KOMATSU PC138US -8 PC138USLC-8 HYDRAULIC EXCAVATOR SERVICE REPAIR MANUAL (PC138USLC- 20001 and up)
- PUBLICATIN NUMBER:SEN01968-12
- SERIAL NUMBERS PC138US- 20001 and up ,PC138USLC- 20001 and up
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Description
KOMATSU PC138US -8 PC138USLC-8 HYDRAULIC EXCAVATOR SERVICE REPAIR MANUAL (PC138USLC- 20001 and up)
KOMATSU PC138US -8 PC138USLC-8 HYDRAULIC EXCAVATOR SERVICE REPAIR MANUAL (PC138USLC- 20001 AND UP) – PDF DOWNLOAD:
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KOMATSU PC138US -8 PC138USLC-8 HYDRAULIC EXCAVATOR SERVICE REPAIR MANUAL (PC138USLC- 20001 and up)
- This shop manual contains the necessary technical information for services performed in a workshop. For ease of understanding, the manual is divided into the following sections.
- 00. Index and foreword
This section explains the shop manuals list, table of contents, safety, and basic information. - 01. Specification
This section explains the specifications of the machine. - 10. Structure, function and maintenance standard
This section explains the structure, function, and maintenance standard values of each component. The structure and function sub-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. The maintenance standard sub-section explains the criteria and remedies for disassembly and service. - 20. Standard value table
This section explains the standard values for new machine and judgement criteria for testing, adjusting, and troubleshooting. This standard value table is used to check the standard values in testing and adjusting and to judge parts in troubleshooting. - 30. Testing and adjusting
This section explains measuring instruments and measuring methods for testing and adjusting, and method of adjusting each part. The standard values and judgement criteria for testing and adjusting are explained in Testing and adjusting. - 40. Troubleshooting
This section explains how to find out failed parts and how to repair them. The troubleshooting is divided by failure modes. The “S mode” of the troubleshooting related to the engine may be also explained in the Chassis volume and Engine volume. In this case, see the Chassis volume. - 50. Disassembly and assembly
This section explains the special tools and procedures for removing, installing, disassembling, and assembling each component, as well as precautions for them. In addition, tightening torque and quantity and weight of coating material, oil, grease, and coolant necessary for the work are also explained. - 90. Diagrams and drawings (chassis volume)/Repair and replacement of parts (engine volume)
Chassis volume
This section gives hydraulic circuit diagrams and electrical circuit diagrams.
Engine volume
This section explains the method of reproducing, repairing, and replacing parts
TABLE OF CONTENTS:
KOMATSU PC138US -8 PC138USLC-8 HYDRAULIC EXCAVATOR SERVICE REPAIR MANUAL (PC138USLC- 20001 and up)
COVER ................................................................................................... 1 00 INDEX AND FOREWORD.................................................................................... 0 Index................................................................................................ 3 Composition of shop manual....................................................................... 4 Table of contents................................................................................ 6 Foreword and general information..................................................................... 15 Safety notice.................................................................................... 16 How to read the shop manual...................................................................... 21 Explanation of terms for maintenance standard.................................................... 23 Handling of electric equipment and hydraulic component........................................... 25 Handling of connectors newly used for engines.................................................... 34 How to read electric wire code................................................................... 37 Precautions when carrying out operation.......................................................... 40 Method of disassembling and connecting push-pull type coupler.................................... 43 Standard tightening torque table................................................................. 46 Conversion table................................................................................. 50 01 SPECIFICATION......................................................................................... 0 SPECIFICATION AND TECHNICAL DATA..................................................................... 57 Specification dimension drawing.................................................................. 58 WORKING RANGE DIAGRAM............................................................................ 59 SPECIFICATIONS................................................................................... 60 Weight table..................................................................................... 66 TABLE OF FUEL, COOLANT AND LUBRICANTS............................................................ 70 10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD.......................................................... 0 ENGINE AND COOLING SYSTEM............................................................................ 73 ENGINE MOUNT..................................................................................... 74 PTO.............................................................................................. 75 COOLING SYSTEM................................................................................... 76 POWER TRAIN.......................................................................................... 79 POWER TRAIN...................................................................................... 80 SWING CIRCLE..................................................................................... 81 SWING MACHINERY.................................................................................. 82 UNDERCARRIAGE AND FRAME.............................................................................. 85 TRACK FRAME...................................................................................... 86 IDLER CUSHION.................................................................................... 88 IDLER............................................................................................ 90 TRACK ROLLER..................................................................................... 91 CARRIER ROLLER................................................................................... 92 SPROCKET......................................................................................... 93 TRACK SHOE....................................................................................... 94 HYDRAULIC SYSTEM, PART 1.............................................................................101 HYDRAULIC EQUIPMENT LAYOUT DRAWING...............................................................102 VALVE CONTROL....................................................................................104 HYDRAULIC TANK AND FILTER........................................................................106 HYDRAULIC PUMP...................................................................................108 HYDRAULIC SYSTEM, PART 2.............................................................................135 CONTROL VALVE....................................................................................136 CLSS.............................................................................................148 FUNCTIONS AND OPERATION BY VALVE.................................................................152 HYDRAULIC SYSTEM, PART 3.............................................................................183 PPC VALVE........................................................................................184 SWING MOTOR......................................................................................201 TRAVEL MOTOR.....................................................................................209 CENTER SWIVEL JOINT..............................................................................218 SOLENOID VALVE...................................................................................222 PPC ACCUMULATOR..................................................................................226 HOLDING VALVE....................................................................................228 MULTI-CONTROL VALVE..............................................................................233 WORK EQUIPMENT.......................................................................................235 WORK EQUIPMENT...................................................................................236 DIMENSIONS OF COMPONENTS.........................................................................238 HYDRAULIC CYLINDER...............................................................................242 CAB AND ITS ATTACHMENTS..............................................................................245 AIR CONDITIONER..................................................................................246 ELECTRICAL SYSTEM....................................................................................259 ELECTRONIC CONTROL SYSTEM........................................................................260 MONITOR SYSTEM...................................................................................293 KOMTRAX SYSTEM...................................................................................307 SENSOR...........................................................................................309 20 STANDARD VALUE TABLE.................................................................................. 0 STANDARD SERVICE VALUE TABLE.........................................................................317 STANDARD VALUE TABLE FOR ENGINE RELATED PARTS....................................................318 STANDARD VALUE TABLE FOR CHASSIS RELATED PARTS...................................................319 30 TESTING AND ADJUSTING................................................................................. 0 TESTING AND ADJUSTING, PART 1........................................................................329 Tools for testing, adjusting, and troubleshooting................................................331 Sketches of special tools........................................................................335 Testing engine speed.............................................................................336 Testing exhaust temperature......................................................................337 Checking exhaust gas color.......................................................................338 Adjusting valve clearance........................................................................339 Testing compression pressure.....................................................................341 Testing blow-by pressure.........................................................................343 Testing engine oil pressure......................................................................344 Handling fuel system parts.......................................................................345 Releasing residual pressure from fuel system.....................................................345 Testing fuel pressure............................................................................346 Testing fuel return rate and fuel leakage........................................................347 Bleeding air from fuel circuit...................................................................349 Checking fuel circuit for leakage................................................................351 Testing and adjusting alternator belt tension....................................................352 Checking and adjusting air conditioner compressor belt tension...................................353 Testing swing circle bearing clearance...........................................................354 Checking and adjusting track shoe tension........................................................355 Testing and adjusting oil pressure in work equipment, swing, and travel circuits.................357 Testing control circuit basic pressure...........................................................360 Testing and adjusting oil pressure in pump PC control circuit....................................361 Testing and adjusting oil pressure in pump LS control circuit....................................364 Testing solenoid valve output pressure...........................................................368 Testing PPC valve output pressure................................................................369 Adjusting play of work equipment and swing PPC valves............................................371 Checking parts which cause hydraulic drift of work equipment.....................................372 Testing and adjusting travel deviation...........................................................374 Releasing residual pressure from hydraulic circuit...............................................376 Testing oil leakage..............................................................................377 Bleeding air from each part......................................................................380 Checking cab tipping stopper.....................................................................382 Adjusting mirrors................................................................................382 TESTING AND ADJUSTING, PART 2 .......................................................................385 SPECIAL FUNCTIONS OF MACHINE MONITOR.............................................................386 TESTING AND ADJUSTING, PART 3........................................................................439 HANDLING VOLTAGE CIRCUIT OF ENGINE CONTROLLER....................................................440 PREPARATION WORK FOR TROUBLESHOOTING OF ELECTRICAL SYSTEM........................................441 PROCEDURE FOR TESTING DIODES.....................................................................446 PM CLINIC SERVICE................................................................................447 40 TROUBLESHOOTING....................................................................................... 0 FAILURE CODE TABLE AND FUSE LOCATIONS................................................................453 FAILURE CODE TABLE...............................................................................454 FUSE LOCATIONS...................................................................................458 General information on troubleshooting...............................................................461 Points to remember when troubleshooting..........................................................462 Sequence of events in troubleshooting............................................................463 Checks before troubleshooting....................................................................464 Classification and procedures for troubleshooting................................................465 Information in troubleshooting table.............................................................466 Phenomena looking like troubles and troubleshooting Nos..........................................468 Connection table for connector pin numbers.......................................................471 T- branch box and T- branch adapter table........................................................507 TROUBLESHOOTING BY FAILURE CODE, PART 1..............................................................511 Failure code [989L00] Engine controller lock caution 1...........................................513 Failure code [989M00] Engine controller lock caution 2...........................................513 Failure code [989N00] Engine controller lock caution 3...........................................514 Failure code [AB00KE] Charge voltage low.........................................................516 Failure code [B@BAZG] Eng oil press. low.........................................................518 Failure code [B@BAZK] Eng oil level low..........................................................518 Failure code [B@BCNS] Eng coolant overheat.......................................................519 Failure code [B@HANS] Hydr oil overheat..........................................................519 Failure code [CA111] ECM critical internal failure...............................................520 Failure code [CA115] Eng. Ne and Bkup speed sensor error.........................................523 Failure code [CA122] Charge air press sensor high error..........................................524 Failure code [CA123] Charge air press sensor low error...........................................526 Failure code [CA131] Throttle sensor high error..................................................528 Failure code [CA132] Throttle sensor low error...................................................530 Failure code [CA144] Coolant temp. sensor high error.............................................531 Failure code [CA145] Coolant temp. sensor low error..............................................532 Failure code [CA153] Charge air temp. sensor high error..........................................533 Failure code [CA154] Charge air temp. sensor low error...........................................534 Failure code [CA187] Sensor sup. 2 volt. low error...............................................534 Failure code [CA221] Ambient air press. sensor high error........................................536 Failure code [CA222] Ambient air press. sensor low error.........................................538 Failure code [CA227] Sensor sup. 2 volt. high error..............................................540 Failure code [CA234] Eng. overspeed..............................................................541 Failure code [CA238] Ne speed sensor sup. volt. error............................................542 Failure code [CA271] IMV/PCV1 short error........................................................544 Failure code [CA272] IMV/PCV1 open error.........................................................545 Failure code [CA322] Injector #1 (L #1) system open/short error..................................546 Failure code [CA324] Injector #3 (L #3) system open/short error..................................548 Failure code [CA331] Injector #2 (L #2) system open/short error..................................550 Failure code [CA332] Injector #4 (L #4) system open/short error..................................552 TROUBLESHOOTING BY FAILURE CODE, PART 2..............................................................555 FAILURE CODE [CA351] INJ. DRIVE CIRCUIT ERROR....................................................557 FAILURE CODE [CA352] SENSOR SUP. 1 VOLT. LOW ERROR...............................................560 FAILURE CODE [CA386] SENSOR SUP. 1 VOLT. HIGH ERROR..............................................562 FAILURE CODE [CA435] ABNORMALITY IN ENGINE OIL PRESSURE SWITCH...................................564 FAILURE CODE [CA441] BATTERY VOLTAGE LOW ERROR...................................................565 FAILURE CODE [CA442] BATTERY VOLTAGE HIGH ERROR..................................................565 FAILURE CODE [CA449] RAIL PRESS. VERY HIGH ERROR.................................................566 FAILURE CODE [CA451] RAIL PRESS. SENSOR HIGH ERROR...............................................568 FAILURE CODE [CA452] RAIL PRESS. SENSOR LOW ERROR................................................570 FAILURE CODE [CA553] RAIL PRESS. HIGH ERROR......................................................570 FAILURE CODE [CA559] RAIL PRESS. LOW ERROR.......................................................571 FAILURE CODE [CA689] ENG. NE SPEED SENSOR ERROR..................................................574 FAILURE CODE [CA731] ENG. BKUP SPEED SENSOR PHASE ERROR..........................................576 FAILURE CODE [CA757] ALL PERSISTENT DATA LOST ERROR..............................................576 FAILURE CODE [CA778] ENG. BKUP SPEED SENSOR ERROR................................................578 FAILURE CODE [CA1633] KOMNET DATALINK TIMEOUT ERROR..............................................580 FAILURE CODE [CA2185] THROTTLE SENS. SUP. VOLT. HIGH ERROR.......................................582 FAILURE CODE [CA2186] THROTTLE SENS. SUP. VOLT. LOW ERROR........................................584 FAILURE CODE [CA2249] RAIL PRESS. VERY LOW ERROR.................................................584 FAILURE CODE [CA2311] ABNORMALITY IN IMV SOLENOID................................................585 FAILURE CODE [D110KB] BATTERY RELAY DRIVE SHORT..................................................586 FAILURE CODE [D19JKZ] PERSONAL CODE RELAY ABNORMALITY............................................588 FAILURE CODE [D862KA] GPS ANTENNA DISCON.........................................................590 FAILURE CODE [DA22KK] PUMP SOLENOID POWER LOW ERROR..............................................592 FAILURE CODE [DA25KP] 5V SENSOR 1 POWER ABNORMALITY..............................................594 FAILURE CODE [DA26KP] 5V SENSOR 2 POWER ABNORMALITY..............................................597 TROUBLESHOOTING BY FAILURE CODE, PART 3..............................................................599 FAILURE CODE [DA2RMC] CAN DISCON (PUMP CONTROLLER DETECTED)......................................602 FAILURE CODE [DAF8KB] SHORT CIRCUIT IN CAMERA POWER SUPPLY.......................................604 FAILURE CODE [DAFGMC] GPS MODULE ERROR...........................................................606 FAILURE CODE [DAFRMC] CAN DISCON (MONITOR DETECTED)..............................................608 FAILURE CODE [DGH2KB] HYDR OIL SENSOR SHORT......................................................610 FAILURE CODE [DHPAMA] PUMP PRESS SENSOR ABNORMALITY..............................................612 FAILURE CODE [DHSFMA] TRAVEL LEFT FORWARD PPC PRESS SENSOR ABNORMALITY...........................614 FAILURE CODE [DHSGMA] TRAVEL RIGHT FORWARD PPC PRESS SENSOR ABNORMALITY..........................616 FAILURE CODE [DHSHMA] TRAVEL LEFT REVERSE PPC PRESS SENSOR ABNORMALITY...........................618 FAILURE CODE [DHSJMA] TRAVEL RIGHT REVERSE PPC PRESS SENSOR ABNORMALITY..........................620 FAILURE CODE [DHSKMA] BLADE RAISE PPC PRESS SENSOR ABNORMALITY...................................622 FAILURE CODE [DHSLMA] BLADE LOWER PPC PRESS SENSOR ABNORMALITY...................................624 FAILURE CODE [DHX1MA] OVERLOAD SENSOR ABNORMALITY (ANALOG).......................................626 FAILURE CODE [DV20KB] TRAVEL ALARM S/C...........................................................627 FAILURE CODE [DW43KA] TRAVEL SPEED SOL DISCON....................................................628 FAILURE CODE [DW43KB] TRAVEL SPEED SOL SHORT.....................................................629 FAILURE CODE [DW45KA] SWING BRAKE SOL DISCON.....................................................630 FAILURE CODE [DW45KB] SWING BRAKE SOL SHORT......................................................632 FAILURE CODE [DW91KA] TRAVEL JUNCTION SOL DISCON.................................................634 FAILURE CODE [DW91KB] TRAVEL JUNCTION SOL SHORT..................................................635 FAILURE CODE [DWJ0KA] MERGE-DIVIDER SOL DISCON...................................................636 FAILURE CODE [DWJ0KB] MERGE-DIVIDER SOL SHORT....................................................637 TROUBLESHOOTING BY FAILURE CODE, PART 4 .............................................................639 FAILURE CODE [DXA8KA] PC-EPC SOL DISCON..........................................................640 FAILURE CODE [DXA8KB] PC-EPC SOL SHORT...........................................................642 FAILURE CODE [DXE4KA] SERVICE CURRENT EPC DISCON.................................................644 FAILURE CODE [DXE4KB] SERVICE CURRENT EPC SHORT..................................................645 FAILURE CODE [DY20KA] WIPER WORKING ABNORMALITY..................................................646 FAILURE CODE [DY20MA] WIPER PARKING ABNORMALITY..................................................648 FAILURE CODE [DY2CKA] WASHER DRIVE DISCON........................................................650 FAILURE CODE [DY2CKB] WASHER DRIVE SHORT.........................................................652 FAILURE CODE [DY2DKB] WIPER DRIVE (FOR) SHORT....................................................654 FAILURE CODE [DY2EKB] WIPER DRIVE (REV) SHORT....................................................656 Troubleshooting of electrical system (E-mode)........................................................659 Before carrying out troubleshooting of electrical system.........................................661 Information in troubleshooting table.............................................................663 E-1 When starting switch turned ON, machine monitor displays nothing.............................664 E-2 When starting switch turned ON (before starting engine), basic check item lights up..........666 E-3 Engine does not start (Engine does not turn).................................................667 E-4 Preheater does not operate...................................................................670 E-5 Automatic warm-up system does not operate (in cold season)...................................672 E-6 All work equipment, swing, and travel mechanism do not move or cannot be locked..............674 E-7 Precaution lights up while engine is running.................................................676 E-8 Emergency stop item lights up while engine is running........................................679 E-9 Engine coolant temperature gauge does not indicate normally..................................680 E-10 Hydraulic oil temperature gauge does not indicate normally..................................681 E-11 Fuel level gauge does not indicate normally.................................................683 E-12 Contents of display by machine monitor are different from applicable machine................685 E-13 Machine monitor does not display some items.................................................685 E-14 Function switch does not work...............................................................685 E-15 Auto-decelerator does not operate normally..................................................686 E-16 Working mode does not change................................................................687 E-17 Travel speed does not change................................................................688 E-18 Alarm buzzer cannot be stopped..............................................................689 E-19 Windshield wiper and window washer do not operate...........................................690 E-20 Swing holding brake does not operate normally...............................................694 E-21 Travel alarm does not sound or does not stop sounding.......................................696 E-22 Air conditioner does not operate normally (including air conditioner abnormality record)....697 E-23 While starting switch is in OFF position, service meter is not displayed....................709 E-24 Machine monitor cannot be set in service mode...............................................709 E-25 Monitoring function does not display lever control signal normally..........................710 E-26 KOMTRAX system does not operate normally....................................................726 TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (H-MODE)..........................................729 INFORMATION CONTAINED IN TROUBLESHOOTING TABLE...................................................731 SYSTEM CHART FOR HYDRAULIC AND MECHANICAL SYSTEMS................................................732 H-1 SPEED OR POWER OF ALL WORK EQUIPMENT, SWING, AND TRAVEL ARE LOW..............................734 H-2 ENGINE SPEED SHARPLY DROPS OR ENGINE STALLS..................................................735 H-3 NO WORK EQUIPMENT, TRAVEL AND SWING MOVE.....................................................736 H-4 ABNORMAL NOISE IS HEARD FROM AROUND HYDRAULIC PUMP...........................................736 H-5 FINE CONTROL MODE DOES NOT FUNCTION..........................................................737 H-6 SPEED OR POWER OF BOOM IS LOW................................................................738 H-7 SPEED OR POWER OF ARM IS LOW.................................................................739 H-8 SPEED OR POWER OF BUCKET IS LOW..............................................................740 H-9 WORK EQUIPMENT DOES NOT MOVE IN ITS SINGLE OPERATION.........................................741 H-10 HYDRAULIC DRIFT OF WORK EQUIPMENT IS LARGE..................................................742 H-11 TIME LAG OF WORK EQUIPMENT IS LARGE.........................................................743 H-12 WORK EQUIPMENT LOADED MORE IS SLOWER DURING COMPOUND OPERATION..............................743 H-13 BOOM RAISE SPEED IS LOW IN COMPOUND OPERATION OF SWING + BOOM RAISE.........................743 H-14 TRAVEL SPEED LOWERS LARGELY DURING COMPOUND OPERATION OF WORK EQUIPMENT/SWING + TRAVEL......744 H-15 MACHINE DEVIATES DURING TRAVEL..............................................................745 H-16 TRAVEL SPEED IS LOW.........................................................................746 H-17 MACHINE CANNOT BE STEERED EASILY OR STEERING POWER IS LOW...................................747 H-18 TRAVEL SPEED DOES NOT CHANGE OR IT IS KEPT LOW OR HIGH......................................748 H-19 TRACK DOES NOT MOVE (ONLY EITHER SIDE)......................................................748 H-20 MACHINE DOES NOT SWING......................................................................749 H-21 SWING ACCELERATION OR SWING SPEED IS LOW....................................................750 H-22 EXCESSIVE OVERRUN WHEN STOPPING SWING.......................................................751 H-23 WHEN UPPER STRUCTURE STOPS SWINGING, IT MAKES LARGE SHOCK...................................752 H-24 WHEN UPPER STRUCTURE STOPS SWINGING, IT MAKES LARGE SOUND...................................752 H-25 HYDRAULIC DRIFT OF SWING IS LARGE...........................................................753 H-26 FLOW RATE IN ATTACHMENT CIRCUIT CANNOT BE ADJUSTED..........................................754 TROUBLESHOOTING OF ENGINE (S-MODE)...................................................................757 METHOD OF USING TROUBLESHOOTING CHART............................................................760 S-1 STARTING PERFORMANCE IS POOR.................................................................764 S-2 ENGINE DOES NOT START........................................................................765 S-3 ENGINE DOES NOT PICK UP SMOOTHLY.............................................................768 S-4 ENGINE STOPS DURING OPERATIONS...............................................................769 S-5 ENGINE DOES NOT ROTATE SMOOTHLY..............................................................770 S-6 ENGINE LACKS OUTPUT (OR LACKS POWER).........................................................771 S-7 EXHAUST SMOKE IS BLACK (INCOMPLETE COMBUSTION)...............................................772 S-8 OIL CONSUMPTION IS EXCESSIVE (OR EXHAUST SMOKE IS BLUE)......................................773 S-9 OIL BECOMES CONTAMINATED QUICKLY.............................................................774 S-10 FUEL CONSUMPTION IS EXCESSIVE...............................................................775 S-11 OIL IS IN COOLANT (OR COOLANT SPURTS BACK OR COOLANT LEVEL GOES DOWN).......................776 S-12 OIL PRESSURE DROPS..........................................................................777 S-13 OIL LEVEL RISES (ENTRY OF COOLANT OR FUEL)..................................................778 S-14 COOLANT TEMPERATURE BECOMES TOO HIGH (OVERHEATING)..........................................779 S-15 ABNORMAL NOISE IS MADE......................................................................780 S-16 VIBRATION IS EXCESSIVE......................................................................781 50 DISASSEMBLY AND ASSEMBLY.............................................................................. 0 General information on disassembly and assembly......................................................783 How to read this manual..........................................................................784 Coating materials list...........................................................................786 Special tool list................................................................................789 Sketch of special tool...........................................................................793 Engine and cooling system............................................................................797 Removal and installation of fuel supply pump assembly............................................798 Removal and installation of fuel injector assembly...............................................800 Removal and installation of front oil seal.......................................................803 Removal and installation of rear oil seal........................................................805 Removal and installation of work equipment oil cooler assembly...................................819 Removal and installation of cylinder head assembly...............................................808 Removal and installation of radiator assembly....................................................815 Removal and installation of aftercooler assembly.................................................817 Removal and installation of engine and work equipment pump assembly..............................822 Removal and installation of fuel tank assembly...................................................827 Power train..........................................................................................831 Removal and installation of travel motor and final drive assembly................................832 Disassembly and assembly of travel motor and final drive assembly................................834 Removal and installation of swing motor and swing machinery assembly.............................871 Disassembly and assembly of swing machinery assembly.............................................873 Removal and installation of swing circle assembly................................................879 UNDERCARRIAGE AND FRAME..............................................................................881 DISASSEMBLY AND ASSEMBLY OF TRACK ROLLER.........................................................882 DISASSEMBLY AND ASSEMBLY OF IDLER ASSEMBLY.......................................................885 DISASSEMBLY AND ASSEMBLY OF RECOIL SPRING........................................................888 REMOVAL AND INSTALLATION OF OF TRACK SHOE ASSEMBLY...............................................891 REMOVAL AND INSTALLATION OF SPROCKET.............................................................893 REMOVAL AND INSTALLATION OF REVOLVING FRAME ASSEMBLY.............................................894 REMOVAL AND INSTALLATION OF COUNTERWEIGHT ASSEMBLY (MACHINE WITHOUT ADD-ON WEIGHT)...............896 REMOVAL AND INSTALLATION OF COUNTERWEIGHT ASSEMBLY (MACHINE WITH ADD-ON WEIGHT)..................898 HYDRAULIC SYSTEM.....................................................................................901 REMOVAL AND INSTALLATION OF CENTER SWIVEL JOINT ASSEMBLY.........................................902 DISASSEMBLY AND ASSEMBLY OF CENTER SWIVEL JOINT ASSEMBLY.........................................904 REMOVAL AND INSTALLATION OF HYDRAULIC TANK ASSEMBLY..............................................905 REMOVAL AND INSTALLATION OF HYDRAULIC PUMP ASSEMBLY..............................................908 REMOVAL AND INSTALLATION OF CONTROL VALVE ASSEMBLY...............................................912 DISASSEMBLY AND ASSEMBLY OF CONTROL VALVE ASSEMBLY...............................................917 DISASSEMBLY AND ASSEMBLY OF WORK EQUIPMENT PPC VALVE ASSEMBLY....................................927 DISASSEMBLY AND ASSEMBLY OF TRAVEL PPC VALVE ASSEMBLY............................................930 DISASSEMBLY AND ASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLY..........................................932 WORK EQUIPMENT BODY..................................................................................939 REMOVAL AND INSTALLATION OF WORK EQUIPMENT ASSEMBLY..............................................940 Cab and its attachments..............................................................................945 Removal and installation of operator cab assembly................................................946 Removal and Installation of operator’s cab door..................................................948 Removal and installation of operator’s cab glass (stuck glass)...................................951 Removal and installation of front window assembly................................................960 Removal and installation of floor frame assembly.................................................961 ELECTRICAL SYSTEM....................................................................................969 REMOVAL AND INSTALLATION OF AIR COMPRESSOR ASSEMBLY..............................................970 REMOVAL AND INSTALLATION OF AIR CONDITIONER CONDENSER............................................971 REMOVAL AND INSTALLATION OF AIR COMPRESSOR UNIT ASSEMBLY.........................................972 REMOVAL AND INSTALLATION OF MACHINE MONITOR ASSEMBLY.............................................975 REMOVAL AND INSTALLATION OF PUMP CONTROLLER ASSEMBLY.............................................976 REMOVAL AND INSTALLATION OF ENGINE CONTROLLER ASSEMBLY...........................................977 REMOVAL AND INSTALLATION OF KOMTRAX COMMUNICATIONS MODULE........................................978 90 DIAGRAMS AND DRAWINGS................................................................................. 0 HYDRAULIC CIRCUIT DIAGRAM............................................................................981 HYDRAULIC CIRCUIT DIAGRAM........................................................................982 Electrical diagrams and drawings.....................................................................987 Electrical circuit diagram.......................................................................989 Connectors table and arrangement drawing.........................................................995
PLEASE NOTE:
⦁ This is the SAME manual used by the dealers to troubleshoot any faults in your vehicle. This can be yours in 2 minutes after the payment is made.
⦁ Contact us at [email protected] should you have any queries before your purchase or that you need any other service / repair / parts operators manual.
2 reviews for KOMATSU PC138US -8 PC138USLC-8 HYDRAULIC EXCAVATOR SERVICE REPAIR MANUAL (PC138USLC- 20001 and up) – PDF DOWNLOAD
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Vicente Jase –
I had a hard time finding the manual until i googled the information, and found your website!