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Komatsu PC750-6, PC750SE-6, PC750LC-6, PC800-6, PC800SE-6 Excavator Shop Manual SEBM008707 – PDF DOWNLOAD
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Komatsu PC750-6, PC750SE-6, PC750LC-6, PC800-6, PC800SE-6 Excavator Shop Manual
MACHINE MODEL SERIAL NUMBER
PC750-6 10001 and up
PC750SE-6 10001 and up
PC750LC-6 10001 and up
PC800-6 30001 and up
PC800SE-6 30001 and up
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Description
Komatsu PC750-6, PC750SE-6, PC750LC-6, PC800-6, PC800SE-6 Excavator Shop Manual
FILE DETAILS:
Komatsu PC750-6, PC750SE-6, PC750LC-6, PC800-6, PC800SE-6 Excavator Shop Manual
Brands: Komatsu
Equipment Type: Hydraulic Excavator
Manuals Type: Shop Manual
Machine Model: PC750-6, PC750SE-6, PC750LC-6, PC800-6, PC800SE-6
Serial Number: 10001 and up, 30001 and up
Book Code: SEBM008707
Language: English
Pages: 981
File Format: Portable Document Format (PDF)
KOMATSU PC750-6, PC750SE-6, PC750LC-6, PC800-6, PC800SE-6 EXCAVATOR SHOP MANUAL SEBM008707 – PDF DOWNLOAD:
DESCRIPTION:
Komatsu PC750-6, PC750SE-6, PC750LC-6, PC800-6, PC800SE-6 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.
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” to “Causes” are also included in this section.
DISASSEMBLY AND ASSEMBLY
This section explains the order to be followed when removing, installing, disassembling or assembling each component, as well as precautions to be taken for these operations.
MAINTENANCE STANDARD
This section gives the judgement standards when inspecting disassembled parts.
TABLE OF CONTENTS:
Komatsu PC750-6, PC750SE-6, PC750LC-6, PC800-6, PC800SE-6 Excavator Shop Manual
MAIN MENU................................................................................................................................................. 0 COVER..................................................................................................................................................... 1 CONTENTS.................................................................................................................................................. 2 01 GENERAL................................................................................................................................................ 28 Specification drawings................................................................................................................................ 29 Specifications........................................................................................................................................ 35 Weight table.......................................................................................................................................... 51 Fuel, coolant and lubricants.......................................................................................................................... 61 10 STRUCTURE AND FUNCTION................................................................................................................................. 64 PTO................................................................................................................................................... 65 PTO lubrication system................................................................................................................................ 66 Radiator, oil cooler, aftercooler..................................................................................................................... 67 Power train........................................................................................................................................... 69 Swing machinery....................................................................................................................................... 71 Swing circle.......................................................................................................................................... 72 Final drive........................................................................................................................................... 73 Track frame........................................................................................................................................... 74 Track shoe............................................................................................................................................ 75 Air piping diagram.................................................................................................................................... 76 Air circuit diagram................................................................................................................................... 77 Air governor.......................................................................................................................................... 78 Air tank.............................................................................................................................................. 78 Safety valve.......................................................................................................................................... 79 Horn valve............................................................................................................................................ 79 Grease pump........................................................................................................................................... 80 Hydraulic piping drawing.............................................................................................................................. 81 Hydraulic circuit drawing............................................................................................................................. 84 Hydraulic tank........................................................................................................................................ 86 Hydraulic pump........................................................................................................................................ 87 Line oil filter.......................................................................................................................................129 Pilot oil filter......................................................................................................................................129 Return oil filter.....................................................................................................................................130 Drain oil filter......................................................................................................................................130 L.H. 5-spool control valve............................................................................................................................131 R.H. 4-spool control valve............................................................................................................................133 Swing motor...........................................................................................................................................139 Center swivel joint...................................................................................................................................143 Travel motor..........................................................................................................................................144 PPC control relief valve..............................................................................................................................155 Safety lock valve.....................................................................................................................................156 Accumulator...........................................................................................................................................157 Valve control.........................................................................................................................................158 Work equipment, swing PPC valve.......................................................................................................................159 Travel PPC valve......................................................................................................................................163 Solenoid valve assembly...............................................................................................................................167 Work equipment........................................................................................................................................168 Air conditioner.......................................................................................................................................171 Actual electric wiring diagram........................................................................................................................173 Electric circuit diagram..............................................................................................................................177 Engine control........................................................................................................................................181 Electronic control system.............................................................................................................................189 Machine monitor system................................................................................................................................212 20 TESTING AND ADJUSTING..................................................................................................................................222 Standard value table for engine related parts.........................................................................................................223 Standard value table for chassis related parts........................................................................................................224 Standard value table for electrical parts.............................................................................................................243 Tools for testing, adjusting, and troubleshooting.....................................................................................................253 Measuring engine speed................................................................................................................................254 Measuring air supply pressure (boost pressure)........................................................................................................255 Measuring exhaust temperature.........................................................................................................................256 Measuring exhaust color...............................................................................................................................257 Adjusting valve clearance.............................................................................................................................258 Measuring compression pressure........................................................................................................................259 Measuring blow-by pressure............................................................................................................................260 Testing and adjusting fuel injection timing...........................................................................................................261 Measuring engine oil pressure.........................................................................................................................262 Testing and adjusting alternator belt tension.........................................................................................................263 Testing and adjusting fan belt tension................................................................................................................263 Testing and adjusting belt tension for air conditioner compressor.....................................................................................264 Testing and adjusting governor motor lever stroke.....................................................................................................265 Adjusting engine speed sensor.........................................................................................................................266 Testing and adjusting hydraulic pressure in work equipment, swing, travel circuit.....................................................................267 Testing and adjusting control pump circuit oil pressure...............................................................................................270 Testing and adjusting piston pump control pressure....................................................................................................273 Measuring servo piston stroke ........................................................................................................................286 Measuring PPC valve output pressure and testing PPC shuttle valve.....................................................................................287 Testing solenoid valve output pressure................................................................................................................288 Adjusting work equipment swing PPC valve..............................................................................................................289 Testing travel deviation..............................................................................................................................290 Testing locations causing hydraulic drift of work equipment...........................................................................................295 Measuring oil leakage.................................................................................................................................296 Testing clearance of swing circle bearing.............................................................................................................301 Testing and adjusting track shoe tension..............................................................................................................303 Bleeding air..........................................................................................................................................304 TROUBLESHOOTING.......................................................................................................................................310 Points to remember when troubleshooting...........................................................................................................311 Sequence of events in troubleshooting.............................................................................................................312 Points to remember when carrying out maintenance..................................................................................................313 Checks before troubleshooting.....................................................................................................................321 Connector types and mounting locations............................................................................................................323 Connection table for connector pin numbers........................................................................................................327 Explanation of control mechanism of electrical system.............................................................................................338 Display method and special functions of monitor panel.............................................................................................340 Method of using judgement table...................................................................................................................356 Method of using troubleshooting charts............................................................................................................358 Details of troubleshooting and troubleshooting procedure..........................................................................................360 Service code table................................................................................................................................365 Troubleshooting of communication abnormality system (N mode)......................................................................................366 N-1 [E218] Communication abnormality..........................................................................................................367 Troubleshooting of governor, pump controller [governor control system] (E mode)...................................................................370 Points to remember when carrying out troubleshooting of governor, pump controller system......................................................371 Action taken by controller and condition of machine when abnormality occurs...................................................................373 Judgement table for governor, pump controller (governor control system) and engine related parts..............................................377 Electrical circuit diagram of governor, pump controller (governor control system).............................................................379 E- 1 Abnormality in governor, pump controller power source (controller LED is OFF)............................................................381 E- 2 [E308] Abnormality in fuel control dial input value is displayed.........................................................................382 E- 3 [E317] Abnormality (disconnection) in governor motor drive system is displayed...........................................................383 E- 4 [E318] Abnormality (short circuit) in governor motor drive system is displayed...........................................................384 E- 5 [E306] Abnormality in feedback potentiometer system is displayed.........................................................................385 E- 6 [E315] Abnormality (short circuit) in battery relay output system is displayed...........................................................386 E- 7 [E316] Abnormality (step-out) in motor is displayed......................................................................................387 E- 8 Engine does not start....................................................................................................................389 E- 9 Engine speed is irregular................................................................................................................391 a) Idling speed is irregular..............................................................................................................391 b) There is hunting.......................................................................................................................393 E-10 Lack of output (engine high idling speed is too low).....................................................................................395 E-11 Engine does not stop.....................................................................................................................397 E-12 Defective operation of battery relay system (engine does not stop).......................................................................399 Troubleshooting of engine (S mode)................................................................................................................402 Method of using troubleshooting charts........................................................................................................403 S- 1 Starting performance is poor (starting always takes time)................................................................................407 S- 2 Engine does not start....................................................................................................................408 1 Engine does not turn....................................................................................................................408 2 Engine turns but exhaust gas does not comes out (fuel is not being injected)............................................................409 3 Exhaust gas comes out but engine does not start (fuel is being injected)................................................................410 S- 3 Engine does not pick up smoothly (follow-up is poor).....................................................................................411 S- 4 Engine stops during operation............................................................................................................412 S- 5 Engine does not rotate smoothly (hunting)................................................................................................413 S- 6 Engine lacks output (no power)...........................................................................................................414 S- 7 Exhaust gas is black (incomplete combustion).............................................................................................415 S- 8 Oil consumption is excessive (or exhaust gas is blue)....................................................................................416 S- 9 Oil becomes contaminated quickly.........................................................................................................417 S-10 Fuel consumption is excessive............................................................................................................418 S-11 Oil is in cooling water, or spurts back, or water level goes down........................................................................419 S-12 Oil pressure caution lamp lights up (drop in oil pressure)...............................................................................420 S-13 Oil level rises (water mixed with fuel)..................................................................................................421 S-14 Water temperature becomes too high (overheating).........................................................................................422 S-15 Abnormal noise is made...................................................................................................................423 S-16 Vibration is excessive...................................................................................................................424 Troubleshooting of governor, pump controller system [pump control system] (C mode)................................................................426 Judgement table for governor, pump controller and hydraulic related parts.....................................................................427 Points to remember when troubleshooting pump controller system................................................................................429 Action taken by controller when abnormality occurs and problems on machine ...................................................................431 Electrical circuit diagram for C mode.........................................................................................................437 C- 1 Abnormality in controller power source system (controller LED is OFF)....................................................................439 C- 2 [E232] Short circuit in front pump TVC solenoid system is displayed......................................................................440 C- 3 [E233] Disconnection in front pump TVC solenoid system is displayed......................................................................442 C- 4 [E203] Short circuit in rear pump TVC solenoid system is displayed.......................................................................444 C- 5 [E213] Disconnection in swing holding brake solenoid system is displayed.................................................................446 C- 6 [E201] Short circuit in CO cancel solenoid system is displayed...........................................................................448 C- 7 [E211] Disconnection in CO cancel solenoid system is displayed...........................................................................449 C- 8 [E202] Short circuit in straight travel solenoid system is displayed.....................................................................450 C- 9 [E212] Disconnection in straight travel solenoid system is displayed.....................................................................451 C-10 [E204] Short circuit in 2-stage relief solenoid system is displayed......................................................................452 C-11 [E214] Disconnection in 2-stage relief solenoid system is displayed......................................................................453 C-12 [E205] Short circuit in swing priority solenoid system is displayed......................................................................454 C-13 [E215] Disconnection in swing priority solenoid system is displayed......................................................................455 C-14 [E206] Short circuit in travel speed solenoid system is displayed........................................................................456 C-15 [E216] Disconnection in travel speed solenoid system is displayed........................................................................457 C-16 [E226] Abnormality in swing speed sensor power source system is displayed................................................................458 C-17 [E207] Short circuit in swing overrun prevention solenoid system is displayed............................................................459 C-18 [E208] Disconnection in swing overrun prevention solenoid system is displayed............................................................460 C-19 [E217] Model selection input error is displayed..........................................................................................461 C-20 [E227] Abnormality in engine speed sensor system is displayed............................................................................463 C-21 Abnormality in machine push-up solenoid system (no service code displayed)...............................................................464 C-22 Abnormality in shockless boom solenoid system (no service code displayed)................................................................467 Troubleshooting of engine throttle, pump controller [input signal system] (F mode)................................................................470 Electrical circuit diagram for F mode.........................................................................................................471 F- 1 Bit pattern 20-(1) Swing oil pressure switch does not light up...........................................................................473 F- 2 Bit pattern 20-(2) R.H. travel oil pressure switch does not light up.....................................................................474 F- 3 Bit pattern 20-(3) Boom LOWER oil pressure switch does not light up......................................................................475 F- 4 Bit pattern 20-(4) Boom RAISE oil pressure switch does not light up......................................................................476 F- 5 Bit pattern 20-(5) Arm IN oil pressure switch does not light up..........................................................................477 F- 6 Bit pattern 20-(6) Arm OUT oil pressure switch does not light up.........................................................................478 F- 7 Bit pattern 21-(1) Bucket CURL oil pressure switch does not light up.....................................................................479 F- 8 Bit pattern 21-(2) Bucket DUMP, service oil pressure switch does not light up............................................................480 F- 9 Bit pattern 21-(5) L.H. travel oil pressure switch does not light up.....................................................................481 F-10 Bit pattern 21-(3) Swing lock switch does not light up...................................................................................482 F-11 Bit pattern 25-(4) Swing speed sensor does not light up..................................................................................483 Troubleshooting of hydraulic, mechanical system (H mode)..........................................................................................484 Table of failure modes and causes.............................................................................................................485 Before carrying out troubleshooting of hydraulic system (H mode)..............................................................................487 All work equipment, travel, swing.............................................................................................................491 H-1 Speeds of all work equipment, swing, travel are slow or lack power........................................................................491 H-2 There is excessive drop in engine speed, or engine stalls.................................................................................492 H-3 No work equipment, travel, swing move.....................................................................................................494 H-4 Abnormal noise generated (around pump)....................................................................................................495 H-5 Auto-deceleration does not work...........................................................................................................495 Work equipment................................................................................................................................496 H-6 Work equipment speed is slow (boom, arm, bucket)..........................................................................................496 H-7 Work equipment (boom, arm, bucket) does not move (but travel and swing are normal)........................................................497 H-8 Excessive hydraulic drift.................................................................................................................497 H-9 Excessive time lag........................................................................................................................498 H-10 Excessive shock when boom is stopped.....................................................................................................498 H-11 Defective actuation of machine push-up function..........................................................................................498 H-12 In compound operations, work equipment is slow...........................................................................................499 Travel system.................................................................................................................................500 H-13 Travel deviation is excessive during compound operations.................................................................................500 H-14 Machine deviates naturally to one side during travel operations..........................................................................502 H-15 Deviation is excessive when srtarting....................................................................................................506 H-16 Travel speed is slow.....................................................................................................................508 H-17 Travel speed does not switch.............................................................................................................509 H-18 Travel does not move (one side only).....................................................................................................509 Swing system..................................................................................................................................510 H-19 Does not swing...........................................................................................................................510 H-20 Swing speed is slow or swing acceleration is poor........................................................................................511 H-21 Swing speed is slow during compound operations...........................................................................................512 H-22 Excessive overrun when stopping swing....................................................................................................512 H-23 Excessive shock when stopping swing......................................................................................................513 H-24 Excessive abnormal noise when stopping swing.............................................................................................513 H-25 Excessive hydraulic drift of swing.......................................................................................................514 H-26 Swing speed is faster than specified swing speed.........................................................................................515 Troubleshooting of monitor panel system (M mode)..................................................................................................517 Action taken by monitor panel when abnormality occurs and problems on machine.................................................................520 Electrical circuit diagram for M mode system..................................................................................................522 M-1 [E101] Abnormality in error data is displayed [E102] Error in clock data is displayed.....................................................524 M-2 [E103] Short circuit in buzzer output or contact of 24V wiring harness with buzzer drive harness is displayed.............................525 M-3 [E104] Air cleaner clogging detected is displayed.........................................................................................526 M-4 [E106] Drop in engine oil pressure Hi detected is displayed...............................................................................526 M-5 [E108] Engine water temperature 105℃ detected is displayed................................................................................527 M-6 When starting switch is turned ON, none of lamps on monitor panel light up for 3 seconds..................................................528 M-7 When starting switch is turned ON, monitor panel lamps all stay lighted up and do not go out..............................................530 M-8 When starting switch is turned ON, items lighted up on monitor panel are different from actual machine (model)...........................530 M-9 When starting switch is turned ON (engine stopped), basic check items flash...............................................................531 M-10 Preheating is not being used but preheating monitor lights up............................................................................534 M-11 When starting switch is turned ON and engine is started, basic check items flash.........................................................535 M-12 When starting switch is turned ON (engine stopped), caution items, emergency stop items flash............................................537 M-13 When starting switch is turned ON and engine is started, caution items, emergency stop items flash.......................................539 M-14 When starting switch is turned ON (engine stopped), buzzer does not sound for 1 second Caution item flashes but buzzer does not sound....543 M-15 No abnormality is displayed on monitor but buzzer sounds.................................................................................543 M-16 Night lighting on monitor panel does not light up (liquid crystal display is normal).....................................................544 M-17 Coolant temperature gauge does not rise..................................................................................................545 M-18 Coolant temperature gauge does not give any display......................................................................................545 M-19 Fuel level gauge always displays FULL....................................................................................................546 M-20 Fuel level gauge does not give any display...............................................................................................546 M-21 Swing lock switch is turned ON (LOCK) but swing lock monitor does not light up...........................................................547 M-22 Swing prolix switch is turned ON (prolix), but swing lock monitor does not flash.........................................................547 M-23 Service meter does not advance while engine is running...................................................................................548 M-24 When starting switch is at OFF and time switch is pressed, time and service meter are not displayed......................................548 M-25 Defective fuel level sensor system.......................................................................................................549 M-26 Defective coolant temperature sensor system..............................................................................................550 M-27 Defective engine oil level sensor system.................................................................................................551 M-28 Defective coolant level sensor system....................................................................................................552 M-29 Defective hydraulic oil level sensor system..............................................................................................553 M-30 Wiper does not work or switch is not being used but wiper is actuated....................................................................554 30 DISASSEMBLY AND ASSEMBLY...............................................................................................................................559 METHOD OF USING MANUAL................................................................................................................................561 PRECAUTIONS WHEN CARRYING OUT OPERATION...............................................................................................................564 SPECIAL TOOL LIST ....................................................................................................................................566 SKETCHES OF SPECIAL TOOLS ............................................................................................................................575 STARTING MOTOR ASSEMBLY Removal, Installation.........................................................................................................579 ALTERNATOR ASSEMBLY Removal, Installation.............................................................................................................580 NOZZLE HOLDER ASSEMBLY Removal, Installation..........................................................................................................581 ENGINE OIL COOLER ASSEMBLY Removal, Installation......................................................................................................583 FUEL INJECTION PUMP ASSEMBLY Removal, Installation....................................................................................................584 WATER PUMP ASSEMBLY Removal, Installation.............................................................................................................585 TURBOCHARGER ASSEMBLY Removal, Installation...........................................................................................................586 THERMOSTAT ASSEMBLY Removal, Installation.............................................................................................................587 AIR COMPRESSOR ASSEMBLY Removal, Installation.........................................................................................................588 ENGINE FRONT SEAL Removal, Installation...............................................................................................................589 ENGINE REAR SEAL Removal, Installation................................................................................................................590 GOVERNOR MOTOR ASSEMBLY Removal, Installation.........................................................................................................595 CYLINDER HEAD ASSEMBLY Removal, Installation..........................................................................................................596 AFTERCOOLER CORE Removal, Installation................................................................................................................603 FAN GUARD, RADIATOR, HYDRAULIC COOLER ASSEMBLY Removal, Installation..................................................................................604 HYDRAULIC COOLER, AFTERCOOLER ASSEMBLY Removal, Installation..........................................................................................607 ENGINE, PTO, HYDRAULIC PUMP ASSEMBLY Removal, Installation ...........................................................................................609 PTO ASSEMBLY Removal, Installation....................................................................................................................617 PTO ASSEMBLY Disassembly, Assembly....................................................................................................................621 FINAL DRIVE ASSEMBLY Removal, Installation............................................................................................................629 FINAL DRIVE ASSEMBLY Disassembly, Assembly............................................................................................................630 REVOLVING FRAME ASSEMBLY Removal, Installation........................................................................................................643 SWING MACHINERY ASSEMBLY Removal, Installation........................................................................................................645 SWING MACHINERY ASSEMBLY Disassembly, Assembly........................................................................................................646 SWING CIRCLE ASSEMBLY Removal, Installation...........................................................................................................656 TRACK SHOE ASSEMBLY Removal, Installation.............................................................................................................657 ONE LINK IN FIELD Disassembly, Assembly...............................................................................................................659 SPROCKET Removal, Installation........................................................................................................................663 IDLER ASSEMBLY Removal, Installation..................................................................................................................664 IDLER ASSEMBLY Disassembly, Assembly..................................................................................................................665 IDLER ADJUSTMENT CYLINDER ASSEMBLY Disassembly, Assembly..............................................................................................669 RECOIL SPRING ASSEMBLY Removal, Installation..........................................................................................................670 RECOIL SPRING ASSEMBLY Disassembly, Assembly..........................................................................................................671 CARRIER ROLLER ASSEMBLY Removal, Installation.........................................................................................................674 CARRIER ROLLER ASSEMBLY Disassembly, Assembly.........................................................................................................675 TRACK ROLLER ASSEMBLY Removal, Installation...........................................................................................................678 TRACK ROLLER ASSEMBLY Disassembly, Assembly...........................................................................................................679 TVC VALVE ASSEMBLY Removal, Installation..............................................................................................................682 CO, NC VALVE ASSEMBLY Removal, Installation...........................................................................................................683 SERVO VALVE ASSEMBLY Removal, Installation............................................................................................................685 NO. 1 PUMP ASSEMBLY Removal, Installation.............................................................................................................686 DISASSEMBLY AND ASSEMBLY..........................................................................................................................690 NO. 2 PUMP ASSEMBLY Removal, Installation.............................................................................................................718 DISASSEMBLY AND ASSEMBLY..........................................................................................................................722 MAIN PUMP INPUT SHAFT OIL SEAL Removal, Installation..................................................................................................748 CONTROL, PTO LUBRICATION PUMP ASSEMBLY Removal, Installation..........................................................................................749 MAIN RELIEF VALVE ASSEMBLY Removal, Installation......................................................................................................751 MAIN RELIEF VALVE ASSEMBLY Disassembly, Assembly......................................................................................................752 CONTROL PUMP RELIEF VALVE ASSEMBLY Removal, Installation..............................................................................................753 LEFT 5-SPOOL CONTROL VALVE ASSEMBLY Removal, Installation.............................................................................................754 RIGHT 4-SPOOL CONTROL VALVE ASSEMBLY Removal, Installation............................................................................................755 CONTROL VALVE ASSEMBLY Disassembly, Assembly..........................................................................................................759 SWING MOTOR ASSEMBLY Removal, Installation............................................................................................................763 DISASSEMBLY AND ASSEMBLY..........................................................................................................................764 CENTER SWIVEL JOINT ASSEMBLY Removal, Installation....................................................................................................774 CENTER SWIVEL JOINT ASSEMBLY Disassembly, Assembly....................................................................................................775 TRAVEL MOTOR ASSEMBLY Removal, Installation...........................................................................................................776 DISASSEMBLY AND ASSEMBLY..........................................................................................................................777 WORK EQUIPMENT PPC VALVE ASSEMBLY Removal, Installation...............................................................................................808 WORK EQUIPMENT PPC VALVE ASSEMBLY Disassembly, Assembly...............................................................................................809 TRAVEL PPC VALVE ASSEMBLY Removal, Installation.......................................................................................................811 TRAVEL PPC VALVE ASSEMBLY Disassembly, Assembly.......................................................................................................812 BUCKET CYLINDER ASSEMBLY Removal, Installation........................................................................................................815 ARM CYLINDER ASSEMBLY Removal, Installation...........................................................................................................819 BOOM CYLINDER ASSEMBLY Removal, Installation..........................................................................................................823 BOTTOM DUMP CYLINDER ASSEMBLY Removal, Installation...................................................................................................827 HYDRAULIC CYLINDER ASSEMBLY Disassembly, Assembly.....................................................................................................830 BUCKET ASSEMBLY Removal, Installation.................................................................................................................835 ARM ASSEMBLY Removal, Installation....................................................................................................................839 BOOM ASSEMBLY Removal, Installation...................................................................................................................843 BUCKET, ARM ASSEMBLY Removal, Installation............................................................................................................847 WORK EQUIPMENT ASSEMBLY Removal, Installation.........................................................................................................849 OPERATOR'S CAB ASSEMBLY Removal, Installation.........................................................................................................853 COUNTERWEIGHT ASSEMBLY Removal, Installation..........................................................................................................855 AIR CONDITIONER COMPRESSOR ASSEMBLY Removal, Installation.............................................................................................856 AIR CONDITIONER UNIT ASSEMBLY Removal, Installation...................................................................................................857 GOVERNOR, PUMP CONTROLLER ASSEMBLY Removal, Installation..............................................................................................859 MONITOR PANEL ASSEMBLY Removal, Installation..........................................................................................................860 CONTROL STAND CASE Removal, Installation..............................................................................................................861 40 MAINTENANCE STANDARD...................................................................................................................................864 Engine mount .........................................................................................................................................866 PTO ..................................................................................................................................................867 Swing circle..........................................................................................................................................869 Swing machinery ......................................................................................................................................870 Final drive .........................................................................................................................................872 Track frame .........................................................................................................................................875 Idler ................................................................................................................................................876 Carrier roller .......................................................................................................................................878 Track roller .........................................................................................................................................879 Track shoe............................................................................................................................................880 Hydraulic pump .......................................................................................................................................885 Charging and PTO lubrication pump ....................................................................................................................887 L.H. 5-spool control valve ...........................................................................................................................890 R.H. 4-spool control valve ...........................................................................................................................892 Swing motor...........................................................................................................................................895 Travel motor..........................................................................................................................................896 Center swivel joint...................................................................................................................................898 PPC control relief valve..............................................................................................................................899 PPC valve ............................................................................................................................................900 Hydraulic cylinder ...................................................................................................................................902 Work equipment .......................................................................................................................................908 Dimensions of work equipment .........................................................................................................................914 90 OTHERS.................................................................................................................................................919 Hydraulic piping drawing (Back hoe)...................................................................................................................920 PC750,PC750SE,PC750LC-6 SERIAL NO.: 10001-10238 - PC800,PC800SE-6 SERIAL NO.: 30001-30174......................................................920 Hydraulic piping drawing (Back hoe)...................................................................................................................922 PC750,PC750SE,PC750LC-6 SERIAL NO.: 10239 AND UP - PC800,PC800SE-6 SERIAL NO.: 30175 AND UP....................................................922 Hydraulic piping drawing (Loading shovel).............................................................................................................923 Hydraulic circuit drawing (Back hoe)..................................................................................................................924 PC750,PC750SE,PC750LC-6 SERIAL NO.: 10001-10238 - PC800,PC800SE-6 SERIAL NO.: 30001-30174......................................................924 Hydraulic circuit drawing (Loading shovel)............................................................................................................925 PC750-6 - SERIAL NO.: 10001-10238.............................................................................................................925 Hydraulic piping drawing (Back hoe)...................................................................................................................926 PC750,PC750SE,PC750LC-6 SERIAL NO.: 10239 AND UP - PC800,PC800SE-6 SERIAL NO.: 30175 AND UP...................................................926 Hydraulic circuit drawing (Loading shovel)............................................................................................................931 PC750-6 - SERIAL NO.: 10239 AND UP............................................................................................................931 Actual electric wiring diagram (1/2) (Back hoe).......................................................................................................936 Actual electric wiring diagram (2/2) (Back hoe).......................................................................................................937 Actual electric wiring diagram (1/2) (Loading shovel).................................................................................................938 Actual electric wiring diagram (2/2) (Loading shovel).................................................................................................939 Electric circuit diagram (1/3) (Back hoe).............................................................................................................940 PC750,PC750SE,PC750LC-6 SERIAL NO.: 10001-10238 - PC800,PC800SE-6 SERIAL NO.: 30001-30174......................................................940 Electric circuit diagram (2/3) (Back hoe).............................................................................................................942 PC750,PC750SE,PC750LC-6 SERIAL NO.: 10001-10238 - PC800,PC800SE-6 SERIAL NO.: 30001-30174......................................................942 Electric circuit diagram (3/3) (Back hoe).............................................................................................................944 PC750,PC750SE,PC750LC-6 SERIAL NO.: 10001-10238 - PC800,PC800SE-6 SERIAL NO.: 30001-30174......................................................944 Electric circuit diagram (1/3) (Loading shovel) ......................................................................................................946 PC750-6 - SERIAL NO.: 10238 AND UP............................................................................................................946 Electric circuit diagram (2/3) (Loading shovel).......................................................................................................947 PC750-6 - SERIAL NO.: 10238 AND UP............................................................................................................947 Electric circuit diagram (3/3) (Loading shovel).......................................................................................................948 PC750-6 - SERIAL NO.: 10238 AND UP............................................................................................................948 Electric circuit diagram (1/3) (Back hoe).............................................................................................................949 PC750,PC750SE,PC750LC-6 SERIAL NO.: 10239 AND UP - PC800,PC800SE-6 SERIAL NO.: 30175 AND UP.....................................................949 Electric circuit diagram (2/3) (Back hoe).............................................................................................................954 PC750,PC750SE,PC750LC-6 SERIAL NO.: 10239 AND UP - PC800,PC800SE-6 SERIAL NO.: 30175 AND UP.....................................................954 Electric circuit diagram (3/3) (Back hoe).............................................................................................................959 PC750,PC750SE,PC750LC-6 SERIAL NO.: 10239 AND UP - PC800,PC800SE-6 SERIAL NO.: 30175 AND UP.....................................................959 Electric circuit diagram (1/3) (Loading shovel).......................................................................................................964 PC750-6 - SERIAL NO.: 10239 AND UP............................................................................................................964 Electric circuit diagram (2/3) (Loading shovel).......................................................................................................969 PC750-6 - SERIAL NO.: 10239 AND UP............................................................................................................969 Electric circuit diagram (3/3) (Loading shovel).......................................................................................................974 PC750-6 - SERIAL NO.: 10239 AND UP............................................................................................................974 Machine control system diagram .......................................................................................................................979 Connector arrangement diagram (1/2)...................................................................................................................980 Connector arrangement diagram (2/2)...................................................................................................................981
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- This is the SAME exact manual used by your dealers to fix your vehicle.
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