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Komatsu PC27MRX-1, PC30MRX-1, PC35MRX-1, PC40MRX-1, PC45MRX-1 Excavator Shop Manual SEBM016808 – PDF DOWNLOAD
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Komatsu PC27MRX-1, PC30MRX-1, PC35MRX-1, PC40MRX-1, PC45MRX-1 Excavator Shop Manual
MACHINE MODEL SERIAL NUMBER
- PC27MRX-1 11574 and up
- PC30MRX-1 10001 and up
- PC35MRX-1 3930 and up
- PC40MRX-1 1001 and up
- PC45MRX-1 1001 and up|
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Description
Komatsu PC27MRX-1, PC30MRX-1, PC35MRX-1, PC40MRX-1, PC45MRX-1 Excavator Shop Manual
FILE DETAILS:
Komatsu PC27MRX-1, PC30MRX-1, PC35MRX-1, PC40MRX-1, PC45MRX-1 Excavator Shop Manual
Brands: Komatsu
Equipment Type: Hydraulic Excavator
Manuals Type: Shop Manual
Machine Model: PC27MRX-1, PC30MRX-1, PC35MRX-1, PC40MRX-1, PC45MRX-1
Serial Number: 11574 and up, 10001 and up, 3930 and up, 1001 and up
Book Code: SEBM016808
Language: English
Pages: 947
File Format: Portable Document Format (PDF)
DESCRIPTION:
Komatsu PC27MRX-1, PC30MRX-1, PC35MRX-1, PC40MRX-1, PC45MRX-1 Excavator Shop Manual
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.
TABLE OF CONTENTS:
Komatsu PC27MRX-1, PC30MRX-1, PC35MRX-1, PC40MRX-1, PC45MRX-1 Excavator Shop Manual
COVER........................................................................................................................................................ 1 CONTENTS..................................................................................................................................................... 2 01 GENERAL................................................................................................................................................... 27 GENERAL ASSEMBLY DRAWING................................................................................................................................. 28 SPECIFICATIONS........................................................................................................................................... 38 WEIGHT TABLE............................................................................................................................................. 66 LIST OF LUBRICANT AND WATER.............................................................................................................................. 76 10 STRUCTURE AND FUNCTION.................................................................................................................................... 78 ENGINE CONTROL........................................................................................................................................... 79 PTO...................................................................................................................................................... 81 RADIATOR AND OIL COOLER.................................................................................................................................. 83 POWER TRAIN.............................................................................................................................................. 87 SWING CIRCLE............................................................................................................................................. 90 SWING MACHINERY.......................................................................................................................................... 91 TRACK FRAME.............................................................................................................................................. 93 IDLER CUSHION............................................................................................................................................ 95 HYDRAULIC PIPING......................................................................................................................................... 97 VALVE CONTROL............................................................................................................................................101 HYDRAULIC TANK...........................................................................................................................................107 CLSS.....................................................................................................................................................111 HYDRAULIC PUMP(PISTON PUMP)..............................................................................................................................186 LS/PC VALVE AND SERVO PISTON.............................................................................................................................201 SOLENOID VALVE...........................................................................................................................................206 CONTROL VALVE............................................................................................................................................209 SWING MOTOR..............................................................................................................................................229 CENTER SWIVEL JOINT......................................................................................................................................237 TRAVEL MOTOR.............................................................................................................................................240 PPC VALVE................................................................................................................................................264 SERVICE PPC VALVE........................................................................................................................................273 WORK EQUIPMENT...........................................................................................................................................277 AIR CONDITIONER..........................................................................................................................................278 ACTUAL ELECTRIC WIRING DIAGRAM...........................................................................................................................279 MACHINE MONITOR SYSTEM...................................................................................................................................283 20 TESTING AND ADJUSTING.....................................................................................................................................290 STANDARD VALUE TABLE FOR ENGINE RELATED PARTS............................................................................................................291 STANDARD VALUE TABLE FOR CHASSIS RELATED PARTS...........................................................................................................296 STANDARD VALUE TABLE FOR ELECTRICAL PARTS................................................................................................................337 TESTING AND ADJUSTING....................................................................................................................................339 TOOLS FOR TESTING,ADJUSTING,AND TROUBLESHOOTING......................................................................................................340 MEASURING ENGINE SPEED...............................................................................................................................341 MEASURING EXHAUST COLOR..............................................................................................................................342 ADJUSTING VALVE CLEARANCE............................................................................................................................343 MEASURING COMPRESSION PRESSURE.......................................................................................................................344 MEASURING ENGINE OIL PRESSURE........................................................................................................................346 TESTING AND ADJUSING FUEL INJECTION TIMING...........................................................................................................347 TESTING AND ADJUSTING FAN BELT TENSION...............................................................................................................348 ADJUSTING FUEL CONTROL LEVER.........................................................................................................................350 MEASURING SPROCKET WEAR..............................................................................................................................352 TESTING AND ADJUSTING TRACK SHOE TENSION.............................................................................................................353 HYDRAULIC EQUIPMENT ADJUSTING CONTROL LEVERS AND PEDAL...............................................................................................354 TESTING AND ADJUSTING HYDRAULIC PRESSURE IN WORK EQUIPMENT,SWING,TRAVEL CIRCUIT......................................................................357 TESTING AND ADJUSTING LS DIFFERENTIAL PRESSURE.......................................................................................................367 ADJUSTING PC VALVE...................................................................................................................................372 TESTING CONTROL CIRCUIT PRESSURE.....................................................................................................................373 TESTING AND ADJUSTING CONTROL CIRCUIT PRESSURE.......................................................................................................375 MEASURING OUTPUT PRESSURE OF SOLENOID VALVE..........................................................................................................377 MEASURING OUTPUT PRESSURE OF PPC VALVE...............................................................................................................380 ADJUSTING WORK EQUIPMENT,SWING PPC VALVE.............................................................................................................382 TESTING SWING HOLDING BRAKE INLET PORT PRESSURE......................................................................................................383 TESTING AND ADJUSTING TRAVEL DEVIATION...............................................................................................................387 MEASURING OIL LEAKAGE INSIDE WORK EQUIPMENT CYLINDER.................................................................................................389 BLEEDING AIR.........................................................................................................................................391 RELEASING REMAINING PRESSURE FROM HYDRAULIC CIRCUIT..................................................................................................393 RELEASING REMAINING PRESSURE FROM HYDRAULIC TANK.....................................................................................................393 PRESSURIZING HYDRAULIC TANK..........................................................................................................................393 TESTING AND ADJUSTING HYDRAULIC BREAKER SERVICE VALVE................................................................................................394 TESTING AND CHARGING PRESSURE OF HYDRAULIC BREAKER GAS(N2)...........................................................................................395 ELECTRICAL RELATED PARTS PROCEDURE FOR CHECKING DIODE................................................................................................398 TROUBLESHOOTING..........................................................................................................................................399 POINTS TO REMEMBER WHEN TROUBLESHOOTING..............................................................................................................400 SEQUENCE OF EVENTS IN TROUBLESHOOTING................................................................................................................401 POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE.....................................................................................................402 CHECKS BEFORE TROUBLESHOOTING .......................................................................................................................410 CONNECTOR TYPES AND MOUNTING LOCATIONS...............................................................................................................411 CONNECTOR PIN ALLOCATION DRAWING.....................................................................................................................415 CONNECTION TABLE FOR CONNECTOR PIN NUMBERS...........................................................................................................421 METHOD OF USING TROUBLESHOOTING CHARTS...............................................................................................................435 TROUBLESHOOTING OF ELECTRICAL SYSTEM(E MODE).........................................................................................................437 E-MODE RELATED ELECTRICAL CIRCUIT DIAGRAM........................................................................................................438 E-1 ENGINE DOES NOT START........................................................................................................................447 a) WHEN STARTING MOTOR DOES NOT TURN (STARTING SYSTEM).......................................................................................447 b) WHEN STARTING MOTOR TURNS (ENGINE STOP SOLENOID SYSTEM)...................................................................................450 E-2 ENGINE DOES NOT STOP.........................................................................................................................466 E-3 WORK EQUIPMENT DOES NOT MOVE EVEN WHEN WORK EQUIPMENT LOCK LEVER IS CANCELED.................................................................470 E-4 WORK EQUIPMENT MOVES EVEN WHEN WORK EQUIPMENT LOCK LEVER IS LOCKED...........................................................................474 E-5 TRAVEL SPEED DOES NOT INCREASE EVEN WHEN TRAVEL BOOST PEDAL IS DEPRESSED.....................................................................478 E-6 TRAVEL SPEED DOES NOT DECREASE EVEN WHEN TRAVEL BOOST PEDAL IS RELEASED......................................................................481 TROUBLESHOOTING OF HYDRAULIC,MECHANICAL SYSTEM(H MODE)...............................................................................................484 TABLE OF FAILURE MODES AND CAUSES................................................................................................................485 H-1 SPEEDS OF ALL WORK EQUIPMENT,SWING,TRAVEL ARE SLOW OR LACK POWER ............................................................................489 H-2 THERE IS EXCESSIVE DROP IN ENGINE SPEED,OR ENGINE STALLS.....................................................................................492 H-3 NO WORK EQUIPMENT,TRAVEL,SWING MOVE..........................................................................................................495 H-4 ABNORMAL NOISE GENERATED(FROM AROUND PUMP)...................................................................................................496 H-5 FINE CONTROL ABILITY IS POOR OR RESPONSE IS POOR.............................................................................................497 H-6 BOOM IS SLOW OR LACKS POWER..................................................................................................................498 H-7 ARM IS SLOW OR LACKS POWER...................................................................................................................500 H-8 BUCKET IS SLOW OR LACKS POWER................................................................................................................502 H-9 BOOM SWING IS SLOW OR LACKS POWER............................................................................................................504 H-10 BLADE IS SLOW OR LACKS POWER................................................................................................................507 H-11 BOOM,ARM,BUCKET DO NOT MOVE(BOOM SWING,BLADE,TRAVEL AND SWING ARE NORMAL)...................................................................508 H-12 EXCESSIVE HYDRAULIC DRIFT(BOOM,ARM,BUCKET,BOOM SWING,BLADE).................................................................................509 a)BOOM.......................................................................................................................................509 b)ARM,BUCKET,BOOM SWING......................................................................................................................509 c)BLADE......................................................................................................................................509 H-13 EXCESSIVE TIME LAG(ENGINE AT LOW IDLING)....................................................................................................510 H-14 IN COMPOUND OPERATIONS, WORK EQUIPMENT WITH LARGER LOAD IS SLOW.............................................................................510 H-15 TRAVEL DEVIATION............................................................................................................................511 a) WHEN THERE IS DEVIATION DURING NORMAL TRAVEL..............................................................................................511 b) THERE IS DEVIATION WHEN MACHINE MOVES OFF.................................................................................................511 H-16 TRAVEL SPEED IS SLOW OR LACKS POWER.........................................................................................................515 H-17 STEERING DOES NOT TURN EASILY...............................................................................................................516 H-18 TRAVEL SPEED DOES NOT SWITCH................................................................................................................516 H-19 TRAVEL DOES NOT MOVE(ONE SIDE ONLY).........................................................................................................516 H-20 SWING SPEED IS SLOW OR LACKS POWER..........................................................................................................517 a) SPEED IS SLOW OR LACKS POWER IN BOTH DIRECTIONS...........................................................................................517 b) SPEED IS SLOW OR LACKS POWER IN ONE DIRECTION ONLY(LEFT OR RIGHT).........................................................................517 H-21 DOES NOT SWING..............................................................................................................................519 a) DOES NOT SWING IN EITHER DIRECTION........................................................................................................519 b) DOES NOT SWING IN ONE DIRECTION(LEFT OR RIGHT)............................................................................................519 H-22 SWING ACCELERATION IS POOR..................................................................................................................520 a) ACCELERATION IS POOR IN BOTH DIRECTIONS...................................................................................................520 b) ACCELERATION IS POOR IN ONE DIRECTION ONLY(LEFT OR RIGHT).................................................................................520 H-23 EXCESSIVE OVERRUN WHEN STOPPING SWING.......................................................................................................521 a) OVERRUN WHEN STOPPING IS EXCESSIVE IN BOTH DIRECTIONS(LEFT AND RIGHT).....................................................................521 b) OVERRUN WHEN STOPPING IS EXCESSIVE IN ONE DIRECTION ONLY(LEFT OR RIGHT)...................................................................521 H-24 EXCESSIVE SHOCK WHEN STOPPING SWING(IN ONE DIRECTION ONLY)..................................................................................522 H-25 EXCESSIVE ABNORMAL NOISE WHEN STOPPING SWING................................................................................................522 H-26 EXCESSIVE HYDRAULIC DRIFT OF SWING..........................................................................................................522 TROUBLESHOOTING OF MACHINE MONITOR SYSTEM(M MODE)....................................................................................................523 M-MODE RELATED ELECTRICAL CIRCUIT DIAGRAM........................................................................................................524 M-1 WHEN STARTING SWITCH IS TURNED ON,NO DISPLAY IS GIVEN........................................................................................528 M-2 WHEN STARTING SWITCH IS TURNED ON,EVEN WHEN SELF CHECK IS COMPLETED(ALL LAMPS LIGHT UP FOR 3 SECONDS),LAMPS DO NOT GO OUT....................530 M-3 WHEN STARTING SWITCH IS TURNED ON, SOME SELF CHECK LAMPS DO NOT LIGHT UP FOR 3 SECONDS.......................................................531 a) NO GAUGE LAMPS LIGHT UP(FUEL,COOLANT TEMPERATURE).........................................................................................531 b) CAUTION LAMPS(ENGINE OIL PRESSURE,BATTERY CHARGE),PILOT LAMP(PREHEATING) DO NOT LIGHT UP..................................................531 M-4 DURING SELF CHECK (ALL LAMPS LIGHT UP FOR 3 SECONDS),EVEN IF STARTING SWITCH IS TURNED TO START,SELF CHECK IS NOT COMPLETED FOR 3 SECONDS....531 M-5 WHEN STARTING SWITCH IS ON(ENGINE STOPPED),ENGINE OIL PRESSURE CAUTION LAMP DOES NOT LIGHT UP................................................532 M-6 WHEN STARTING SWITCH IS ON(ENGINE STOPPED),CHARGE CAUTION LAMP DOES NOT LIGHT UP.............................................................533 M-7 WHEN STARTING SWITCH IS TURNED TO HEAT,PREHEATING PILOT LAMP DOES NOT LIGHT UP...............................................................534 M-8 WHEN ENGINE IS RUNNING, ENGINE OIL PRESSURE CAUTION LAMP LIGHTS UP...........................................................................535 M-9 WHEN ENGINE IS RUNNING, CHARGE CAUTION LAMP LIGHTS UP........................................................................................536 M-10 ABNORMALITY IN COOLANT TEMPERATURE GAUGE....................................................................................................537 a) LEVEL DOES NOT RISE FROM SEGMENT C........................................................................................................537 b) LEVEL DOES NOT GO DOWN FROM SEGMENT H,OR ALL SEGMENTS GO OUT..............................................................................537 c) COOLANT TEMPERATURE DOES NOT MATCH GAUGE DISPLAY..........................................................................................538 M-11 ABNORMALITY IN FUEL GAUGE...................................................................................................................543 a) LEVEL DOES NOT RISE FROM SEGMENT E OR ALL SEGMENTS GO OUT.................................................................................543 b) LEVEL DOES NOT GO DOWN FROM SEGMENT F.....................................................................................................543 c) FUEL LEVEL DOES NOT MATCH GAUGE DISPLAY...................................................................................................544 M-12 DEFECTIVE OPERATION OF ALARM BUZZER.........................................................................................................547 a) BUZZER DOES NOT SOUND.....................................................................................................................547 b) BUZZER CONTINUES TO SOUND AND DOES NOT STOP...............................................................................................547 M-13 WHEN ENGINE IS RUNNING,SERVICE METER DOES NOT ADVANCE.......................................................................................550 a) WHEN CHARGE CAUTION LAMP DOSE NOT LIGHT UP................................................................................................550 b) WHEN CHARGE CAUTION LAMP LIGHTS UP........................................................................................................550 c) PILOT LAMP DOES NOT FLASH(SERVICE METER IS ACTUATED)......................................................................................550 M-14 NIGHT LIGHTING DOES NOT LIGHT UP............................................................................................................551 a) GAUGE LIGHTING DOES NOT LIGHT UP..........................................................................................................551 b) SERVICE METER LIGHTING DOES NOT LIGHT UP..................................................................................................551 30 DISASSEMBLY AND ASSEMBLY..................................................................................................................................555 METHOD OF USING MANUAL...................................................................................................................................557 PRECAUTIONS WHEN CARRYING OUT OPERATION..................................................................................................................558 SPECIAL TOOL LIST........................................................................................................................................560 SKETCHES OF SPECIAL TOOLS................................................................................................................................565 STARTING MOTOR...........................................................................................................................................571 REMOVAL AND INSTALLATION.............................................................................................................................571 ALTERNATOR...............................................................................................................................................573 REMOVAL AND INSTALLATION.............................................................................................................................573 FUEL INJECTION PUMP......................................................................................................................................576 REMOVAL..............................................................................................................................................576 INSTALLATION.........................................................................................................................................577 NOZZLE HOLDER............................................................................................................................................580 REMOVAL AND INSTALLATION ............................................................................................................................580 WATER PUMP...............................................................................................................................................582 REMOVAL AND INSTALLATION.............................................................................................................................582 THERMOSTAT...............................................................................................................................................583 REMOVAL AND INSTALLATION.............................................................................................................................583 ENGINE FRONT SEAL........................................................................................................................................584 REMOVAL AND INSTALLATION.............................................................................................................................584 ENGINE REAR SEAL.........................................................................................................................................585 REMOVING.............................................................................................................................................585 INSTALLATION.........................................................................................................................................586 CYLINDER HEAD ...........................................................................................................................................587 REMOVAL..............................................................................................................................................587 INSTALLATION.........................................................................................................................................589 RADIATOR,HYDRAULIC COOLER................................................................................................................................590 REMOVAL..............................................................................................................................................590 INSTALLATION.........................................................................................................................................591 ENGINE,MAIN PUMP.........................................................................................................................................595 REMOVAL..............................................................................................................................................595 INSTALLATION.........................................................................................................................................598 DAMPER...................................................................................................................................................603 REMOVAL AND INSTALLATION.............................................................................................................................603 CENTER SWIVEL JOINT......................................................................................................................................604 REMOVAL AND INSTALLATION.............................................................................................................................604 DISASSEMBLY AND ASSEMBLY.............................................................................................................................608 TRAVEL MOTOR ............................................................................................................................................612 REMOVAL AND INSTALLATION.............................................................................................................................612 TRAVEL MOTOR(PHV-500(FOR PC40MRX-1)).....................................................................................................................613 DISASSEMBLY AND ASSEMBLY.............................................................................................................................613 SPROCKET.................................................................................................................................................628 REMOVAL AND INSTALLATION.............................................................................................................................628 SWING MOTOR,SWING MACHINERY..............................................................................................................................629 REMOVAL AND INSTALLATION.............................................................................................................................629 DISASSEMBLY..........................................................................................................................................634 ASSEMBLY.............................................................................................................................................637 SWING MOTOR..............................................................................................................................................640 DISASSEMBLY..........................................................................................................................................640 ASSEMBLY.............................................................................................................................................645 REVOLVING FRAME..........................................................................................................................................653 REMOVAL..............................................................................................................................................653 INSTALLATION.........................................................................................................................................654 SWING CIRCLE.............................................................................................................................................656 REMOVAL AND INSTALLATION.............................................................................................................................656 IDLER....................................................................................................................................................657 REMOVAL AND INSTALLATION.............................................................................................................................657 DISASSEMBLY..........................................................................................................................................658 ASSEMBLY.............................................................................................................................................659 RECOIL SPRING............................................................................................................................................660 REMOVAL AND INSTALLTION..............................................................................................................................660 DISASSEMBLY..........................................................................................................................................661 ASSEMBLY.............................................................................................................................................663 TRACK ROLLER.............................................................................................................................................665 REMOVAL AND INSTALLATION.............................................................................................................................665 DISASSEMBLY..........................................................................................................................................666 ASSEMBLY.............................................................................................................................................667 CARRIER ROLLER...........................................................................................................................................668 REMOVAL AND INSTALLATION.............................................................................................................................668 DISASSEMBLY AND ASSEMBLY.............................................................................................................................669 RUBBER SHOE..............................................................................................................................................670 REMOVAL AND INSTALLATION.............................................................................................................................670 HYDRAULIC TANK...........................................................................................................................................671 REMOVAL AND INSTALLATION.............................................................................................................................671 FUEL TANK ...............................................................................................................................................676 REMOVAL..............................................................................................................................................676 INSTALLATION.........................................................................................................................................677 MAIN PUMP................................................................................................................................................679 REMOVAL AND INSTALLATION ............................................................................................................................679 MAIN PUMP(LPV30 (FOR PC30MRX-1)).........................................................................................................................680 DISASSEMBLY..........................................................................................................................................680 ASSEMBLY.............................................................................................................................................688 MAIN PUMP(LPD25+25(FOR PC40MRX-1)).......................................................................................................................699 DISASSEMBLY..........................................................................................................................................699 ASSEMBLY.............................................................................................................................................708 SWING GEAR PUMP..........................................................................................................................................721 REMOVAL AND INSTALLATION.............................................................................................................................721 PPC PUMP.................................................................................................................................................722 REMOVAL AND INSTALLATION.............................................................................................................................722 MAIN CONTROL VALVE.......................................................................................................................................724 REMOVAL .............................................................................................................................................724 INSTALLATION.........................................................................................................................................725 DISASSEMBLY..........................................................................................................................................730 ASSEMBLY.............................................................................................................................................736 WORK EQUIPMENT LEFT PPC VALVE(FOR ARM,SWING CONTROL).....................................................................................................759 REMOVAL AND INSTALLATION.............................................................................................................................759 WORK EQUIPMENT RIGHT PPC VALVE(FOR BOOM AND BUCKET CONTROL)..............................................................................................761 REMOVAL AND INSTALLATION.............................................................................................................................761 WORK EQUIPMENT PPC VALVE.................................................................................................................................763 DISASSEMBLY..........................................................................................................................................763 ASSEMBLY.............................................................................................................................................764 BOOM CYLINDER............................................................................................................................................765 REMOVAL AND INSTALLATION.............................................................................................................................765 ARM CYLINDER.............................................................................................................................................768 REMOVAL AND INSTALLATION.............................................................................................................................768 BUCKET CYLINDER..........................................................................................................................................771 REMOVAL AND INSTALLATION.............................................................................................................................771 SWING CYLINDER...........................................................................................................................................774 REMOVAL AND INSTALLATION.............................................................................................................................774 BLADE CYLINDER ..........................................................................................................................................780 REMOVAL AND INSTALLATION.............................................................................................................................780 HYDRAULIC CYLINDER.......................................................................................................................................783 DISASSEMBLY..........................................................................................................................................783 ASSEMBLY.............................................................................................................................................786 WORK EQUIPMENT...........................................................................................................................................790 REMOVAL AND INSTALLATION.............................................................................................................................790 BUCKET...................................................................................................................................................793 REMOVAL AND INSTALLATION.............................................................................................................................793 ARM......................................................................................................................................................795 REMOVAL AND INSTALLATION.............................................................................................................................795 BUCKET,ARM...............................................................................................................................................798 REMOVAL AND INSTALLATION.............................................................................................................................798 SWING BRACKET............................................................................................................................................801 REMOVAL AND INSTALLATION.............................................................................................................................801 BLADE....................................................................................................................................................804 REMOVAL AND INSTALLATION.............................................................................................................................804 SEAT BRACKET,R.H. AND L.H. PPC VALVE.....................................................................................................................807 REMOVAL..............................................................................................................................................807 INSTALLATION.........................................................................................................................................809 SEAT BRACKET.............................................................................................................................................810 REMOVAL AND INSTALLATION.............................................................................................................................810 SOLENOID VALVE...........................................................................................................................................811 REMOVAL..............................................................................................................................................811 INSTALLATION.........................................................................................................................................812 HEATER...................................................................................................................................................815 REMOVAL AND INSTALLATION.............................................................................................................................815 FLOOR FRAME..............................................................................................................................................816 REMOVAL .............................................................................................................................................816 INSTALLATION.........................................................................................................................................819 CANOPY...................................................................................................................................................820 REMOVAL AND INSTALLATION.............................................................................................................................820 OPERATOR'S CAB...........................................................................................................................................821 REMOVAL .............................................................................................................................................821 INSTALLATION.........................................................................................................................................822 COUNTERWEIGHT............................................................................................................................................823 REMOVAL AND INSTALLATION.............................................................................................................................823 HYDRAULIC BREAKER........................................................................................................................................824 DISASSEMBLY..........................................................................................................................................824 ASSEMBLY.............................................................................................................................................831 40 MAINTENANCE STANDARD......................................................................................................................................839 SWING MACHINERY..........................................................................................................................................840 SWING CIRCLE.............................................................................................................................................844 TRACK FRAME..............................................................................................................................................845 IDLER....................................................................................................................................................849 CARRIER ROLLER...........................................................................................................................................852 TRACK ROLLER.............................................................................................................................................854 SPROCKET.................................................................................................................................................856 TRACK SHOE...............................................................................................................................................858 HYDRAULIC PUMP...........................................................................................................................................866 CONTROL VALVE............................................................................................................................................870 SWING MOTOR..............................................................................................................................................887 TRAVEL MOTOR.............................................................................................................................................889 PPC VALVE................................................................................................................................................893 SERVICE PPC VALVE........................................................................................................................................896 CENTER SWIVEL JOINT......................................................................................................................................898 HYDRAULIC CYLINDER.......................................................................................................................................901 WORK EQUIPMENT...........................................................................................................................................908 DIMENSION OF WORK EQUIPMENT..............................................................................................................................912 90 OTHERS....................................................................................................................................................928 HYDRAULIC CIRCUIT DIAGRAM................................................................................................................................929 PC27MRX-1............................................................................................................................................929 PC30MRX-1............................................................................................................................................930 PC35MRX-1............................................................................................................................................931 PC40MRX-1 (SERIAL NO.:1001-5500).....................................................................................................................932 PC40MRX-1 (EU SPEC.)(SERIAL NO.:1001-5500)...........................................................................................................934 PC45MRX-1 (SERIAL NO.:1001-3000).....................................................................................................................936 ELECTRICAL CIRCUIT DIAGRAM...............................................................................................................................938 PC27,30MRX-1(CANOPY SPECIFICATION)...................................................................................................................938 PC27,30MRX-1(CAB SPECIFICATION)......................................................................................................................939 PC35MRX-1(CAB SPECIFICATION).........................................................................................................................940 PC40,45MRX-1(CAB SPECIFICATION)......................................................................................................................941 PC40MRX-1(CAB SPECIFICATION)(EU SPEC.)...............................................................................................................943 PC40,45MRX-1(CAB SPECIFICATION)(USA SPEC.)...........................................................................................................945 AIR CONDITIONER ELECTRICAL CIRCUIT DIAGRAM...........................................................................................................947
KOMATSU PC27MRX-1, PC30MRX-1, PC35MRX-1, PC40MRX-1, PC45MRX-1 EXCAVATOR SHOP MANUAL SEBM016808 – PDF DOWNLOAD:
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- This is the same manual used by the dealers inorder to diagnose your vehicle of its faults.
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