Komatsu Hydraulic Excavators PC750SE-6K, PC750LC-6K Repair Service Manual
Complete service repair manual with Electrical Wiring Diagrams for Komatsu Hydraulic Excavators PC750SE-6K, PC750LC-6K, with all the technical information to maintain, diagnose, repair, rebuild like professional mechanics.
Komatsu Hydraulic Excavators PC750SE-6K, PC750LC-6K workshop service repair manual includes:
* Numbered table of contents easy to use so that you can find the information you need fast.
* Detailed sub-steps expand on repair procedure information
* Numbered instructions guide you through every repair procedure step by step.
* Troubleshooting and electrical service procedures are combined with detailed wiring diagrams for ease of use.
* Notes, cautions and warnings throughout each chapter pinpoint critical information.
* Bold figure number help you quickly match illustrations with instructions.
* Detailed illustrations, drawings and photos guide you through every procedure.
* Enlarged inset helps you identify and examine parts in detail.
PRODUCT DETAILS:
Total Pages: 2,142 pages
File Format: PDF (Internal Links, Bookmarked, Table of Contents, Searchable, Printable, high quality)
Language: English
EEAM008708 - Hydraulic Excavator PC750SE-6K, PC750LC-6K Operation & Maintenance Manual.pdf
UEAM002901 - Hydraulic Excavator PC750LC-7K, PC750SE-7K Operation & Maintenance Manual.pdf
UEBM001801 - Hydraulic Excavator PC750SE-6K, PC750LC-6K Shop Manual.pdf
UEBM002400 - Hydraulic Excavator PC750SE-7K, PC750LC-7K Shop Manual.pdf
MAIN SECTIONS
EEAM008708 - Hydraulic Excavator PC750SE-6K, PC750LC-6K Operation & Maintenance Manual....2
FOREWORD....4
FOREWORD....5
SAFETY INFORMATION....7
NOISE....8
VIBRATION....8
INTRODUCTION....9
INTENDED USE....9
FEATURES....9
RUNNING IN THE MACHINE....9
LOCATION OF PLATES, TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR....11
MACHINE SERIAL NO. PLATE POSITION....11
ENGINE SERIAL NO. PLATE POSITION....11
SERVICE METER POSITION....12
TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR....12
MACHINE SERIAL PLATE....13
SAFETY....20
GENERAL PRECAUTIONS....21
PRECAUTIONS DURING OPERATION....29
BEFORE STARTING THE ENGINE....29
AFTER STARTING ENGINE....31
TRANSPORTATION....38
BATTERY....39
TOWING....41
LIFTING OPERATIONS....42
PRECAUTIONS FOR MAINTENANCE....43
BEFORE CARRYING OUT MAINTENANCE....43
DURING MAINTENANCE....47
POSITION FOR ATTACHING SAFETY LABELS....55
OPERATION....62
GENERAL VIEW....63
GENERAL VIEW OF MACHINE....63
EXPLANATION OF COMPONENTS....64
MACHINE MONITOR....65
BASIC CHECK ITEMS (A)....67
CAUTION ITEMS (B)....69
EMERGENCY STOP ITEMS (C)....70
METER DISPLAY PORTION (D)....71
SWITCHES (E)....75
SWITCHES....77
CONTROL LEVERS, PEDALS....84
CEILING WINDOW....86
FRONT WINDOW....87
DOOR LOCK....91
LOCKABLE COMPARTMENTS AND FUEL CAP....91
OPENING AND CLOSING CAP WITH LOCK (for the fuel tank filler port)....92
OPENING AND CLOSING LOCKABLE COMPARTMENTS....92
LUGGAGE BOX....92
ASHTRAY....93
HANDLING AIR CONDITIONER....93
GENERAL LOCATIONS ON CONTROL PANEL....93
PRECAUTIONS WHEN USING AIR CONDITIONER....95
RADIO-CASSETTE (OPTION)....96
PRECAUTION DURING USE....96
FUSE....96
Fuse Capacities and Circuit Names....97
FUSIBLE LINK....97
CIRCUIT BREAKER....98
CONTROLLERS....99
TOOLKIT HOLDER (CLOTH BAG)....99
GREASE PUMP....99
Method of Use....100
Precautions when Using....101
Supplying Grease....101
ACCUMULATOR HANDLING....103
RELEASING PRESSURE IN THE CONTROL CIRCUIT ON MACHINES EQUIPPED WITH AN ACCUMULATOR....103
OPERATION....105
CHECKS BEFORE STARTING ENGINE....105
WALK-AROUND CHECK....105
CHECK BEFORE STARTING....106
ADJUST OPERATORS SEAT....113
Rearview Mirrors....115
Seat Belt....115
OPERATIONS AND CHECKS BEFORE STARTING ENGINE....117
STARTING ENGINE....118
NORMAL STARTING....118
STARTING IN COLD WEATHER....119
OPERATIONS AND CHECKS AFTER STARTING ENGINE....121
WHEN NORMAL....121
IN COLD AREAS (AUTOMATIC WARMING-UP OPERATION)....123
TRAVELLING....126
TRAVELLING FORWARD....126
TRAVELLING BACKWARD....128
CHANGING DIRECTION....129
STOPPING MACHINE....132
SWINGING....133
OPERATION OF WORK EQUIPMENT....134
WORKING MODE OPERATION....135
PROHIBITIONS FOR OPERATION....136
PRECAUTIONS FOR OPERATION....138
PRECAUTIONS WHEN TRAVELING UP OR DOWN HILLS....139
HOW TO ESCAPE FROM MUD....140
WHEN ONE SIDE IS STUCK....141
WHEN BOTH SIDES ARE STUCK....141
WORK POSSIBLE USING HYDRAULIC EXCAVATORS....141
BACKHOE WORK....141
DITCHING WORK....142
LOADING WORK....142
REPLACEMENT OF BUCKET....142
REPLACEMENT....142
PARKING MACHINE....144
CHECK AFTER FINISHING WORK....145
STOPPING ENGINE....145
CHECK AFTER STOPPING ENGINE....146
LOCKING....147
TRANSPORTATION....148
LOADING, UNLOADING WORK....148
PRECAUTIONS FOR LOADING....150
PRECAUTIONS FOR TRANSPORTATION....150
TRANSPORTATION POSTURE....151
PROCEDURE FOR INCREASING OR REDUCING TRACK FRAME GAUGE....156
COLD WEATHER OPERATION....158
PRECAUTIONS FOR LOW TEMPERATURE....158
FUEL AND LUBRICANTS....158
COOLANT....158
BATTERY....159
PRECAUTIONS AFTER COMPLETION OF WORK....159
AFTER COLD WEATHER....160
LONG-TERM STORAGE....161
BEFORE STORAGE....161
DURING STORAGE....161
AFTER STORAGE....162
STARTING MACHINE AFTER LONG-TERM STORAGE....162
TROUBLESHOOTING....163
WHEN MACHINE RUNS OUT OF FUEL....163
PHENOMENA THAT ARE NOT FAILURES....163
METHOD OF TOWING MACHINE....163
PRECAUTIONS ON PARTICULAR JOBSITES....164
IF BATTERY IS DISCHARGED....164
REMOVAL AND INSTALLATION OF BATTERY....164
STARTING ENGINE WITH BOOSTER CABLE....165
OTHER TROUBLE....167
ELECTRICAL SYSTEM....167
CHASSIS....168
Engine....169
Electronic Control System....171
MAINTENANCE....172
GUIDES TO MAINTENANCE....173
OUTLINES OF SERVICE....176
OUTLINE OF OIL, FUEL, COOLANT....176
OIL....176
USE OF BIO-DEGRADEABLE OIL....177
FUEL....177
COOLANT....178
GREASE....178
STORING OIL AND FUEL....179
FILTERS....179
OUTLINE OF ELECTRICAL SYSTEM....179
OUTLINE OF HYDRAULIC SYSTEM....180
RELEASING PRESSURE....181
RELEASING PRESSURE FROM WORK EQUIPMENT CIRCUIT, SWING CIRCUIT, TRAVEL CIRCUIT....181
BLEEDING AIR FROM CIRCUIT....181
Procedure for bleeding air....182
WEAR PARTS....184
WEAR PARTS LIST....184
USE OF FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE....186
PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS....186
STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS....190
LIST OF NECESSARY TOOLS....190
TIGHTENING TORQUE LIST....191
SAFETY CRITICAL PARTS....192
SAFETY CRITICAL PARTS LIST....193
MAINTENANCE SCHEDULE....194
MAINTENANCE SCHEDULE CHART....194
SERVICE PROCEDURE....196
INITIAL 100 HOURS SERVICE....196
INITIAL 250 HOURS SERVICE....196
WHEN REQUIRED....196
Air Cleaner Element - Check/Clean/Replace....196
Checking....197
Air Cleaner Element - Install....199
Air Cleaner Inner Element - Replace....200
Cooling System Coolant - Clean/Change....202
CHECK AND TIGHTEN TRACK SHOE BOLTS....205
CHECK AND ADJUST TRACK TENSION....206
CHECK ELECTRICAL INTAKE AIR HEATER....208
REPLACE BUCKET TEETH (HORIZONTAL PIN TYPE)....208
ADJUST BUCKET CLEARANCE....209
Replacement of Fan Belt and Adjustment of Auto Tensioner....211
CHECK WINDOW WASHER FLUID LEVEL, ADD FLUID....212
AIR CONDITIONER CHECK AND MAINTENANCE....213
Clean Line Filter, Remove Dirt....214
CHECK BEFORE STARTING....215
CHECK COOLANT LEVEL....215
CHECK OIL LEVEL IN ENGINE OIL PAN....215
CHECK FUEL LEVEL....215
CHECK OIL LEVEL IN HYDRAULIC TANK....215
CHECK FOR CLOGGING OF AIR CLEANER....215
CHECK ELECTRICAL WIRING....215
CHECK FUNCTION OF HORN....215
CHECK OIL LEVEL IN SWING MACHINERY CASE, ADD OIL....216
CHECK OIL LEVEL IN P.T.O. CASE, ADD OIL....216
EVERY 10 HOURS SERVICE....217
LUBRICATING....217
DRAIN FUEL - WATER SEPARATOR....219
EVERY 100 HOURS MAINTENANCE....220
Swing Circle - Lubricate (4 points)....220
Fuel Tank - Drain....220
EVERY 250 HOURS MAINTENANCE....220
Final Drive Case Oil Level - Check/Add....220
Battery Electrolyte Level - Check....221
Fuel tank Strainer - Check/Clean....222
Track Frame and Axle Connecting Bolts - Check/ Tighten....223
Alternator Belt Tension - Inspect/Adjust....223
Air Conditioner Compressor Belt Tension - Inspect/Adjust....225
EVERY 500 HOURS MAINTENANCE....226
Fuel Filter Cartridge - Replace....226
Swing Pinion Gear Oil Level - Check/Add....228
Hydraulic Tank Strainer - Clean....229
Hydraulic Oil Filter Element - Replace....230
Radiator Fins, Oil Cooler Fins, After Cooler Fins, Fuel Filter Fins and Condenser Fins (Only for .....231
Air Conditioner FRESH/RECIRC Air Filters (Only for Machines Equipped with Air Conditioner) - Clean....232
Pilot Filter Element - Replace....233
P.T.O Case Oil Strainer - Clean....234
Fan Belt - Inspect....234
Drain Filter Cartridge - Replace....235
Change Oil In Engine Oil Pan, Replace Engine Oil Filter Cartridge....235
EVERY 1000 HOURS MAINTENANCE....238
Swing Machinery Case Oil - Change....238
P.T.O Case Oil - Change....239
Turbocharger Fastening Parts - Inspect/Tighten....240
Turbocharger Rotor Play - Inspect....240
Corrosion Resister Cartridge - Replace....240
Fan Pulley Assembly and Tension Pulley Assembly - Lubricate....241
Hydraulic Tank Breather Filter Element - Replace....242
Welded Structure - Check....243
EVERY 2000 HOURS MAINTENANCE....246
Final Drive Case Oil - Change....246
Injector - Check....246
Engine Crankcase Breather - Clean....247
Turbocharger - Inspect....247
Alternator and Starting Motor - Inspect....247
Engine Valve Clearances - Inspect....248
EVERY 4000 HOURS MAINTENANCE....248
Water Pump - Inspect....248
Vibration Damper - Inspect....248
Fan Pulley and Tension Pulley - Check....248
Checking for Looseness of High-pressure Clamp, Hardening of Rubber....249
Injector Nozzle Assembly - Replace....250
Checking for Missing Fuel Spray Prevention Cap, Hardening of Rubber....250
EVERY 5000 HOURS MAINTENANCE....251
EVERY 8000 HOURS MAINTENANCE....253
High-pressure Piping Clamp - Replace....253
Fuel Spray Prevention Cap - Replace....253
SPECIFICATIONS....256
SPECIFICATIONS....257
MEMO....259
OPTIONS AND ATTACHMENTS....260
GENERAL PRECAUTIONS....261
PRECAUTIONS RELATED TO SAFETY....261
PRECAUTIONS WHEN INSTALLING ATTACHMENTS....262
OPTIONAL PARTS AND ATTACHMENTS....263
WORK EQUIPMENT COMBINATIONS....263
SELECTION OF TRACK SHOES....264
MEMO....267
LOADING SHOVEL....268
GENERAL LOCATIONS....269
INSTRUMENTS AND CONTROLS....270
SWITCHES....270
OPERATION OF WORK EQUIPMENT....271
PRECAUTIONS FOR MACHINE OPERATION....274
PRECAUTONS DURING OPERATION....274
PRECAUTIONS WHEN DISASSEMBLING MACHINE....278
RELEASING PRESSURE....278
RELEASING PRESSURE FROM WORK EQUIPMENT CIRCUIT, SWING CIRCUIT, TRAVEL CIRCUIT....278
RELEASING PRESSURE IN ACCUMULATOR CIRCUIT....278
MAINTENANCE....279
CHECK BEFORE STARTING....279
CHECK OIL LEVEL IN HYDRAULIC TANK, ADD OIL....279
EVERY 10 HOURS SERVICE....280
LUBRICATING....281
CHANGE OIL IN HYDRAULIC TANK, CLEAN STRAINER....281
EXCAVATOR WORK....284
TRANSPORTATION....285
PARTS FOR TRANSPORT....285
CONSUMABLE PARTS LIST....287
SPECIFICATIONS....288
COMBINATIONS OF WORK EQUIPMENT....289
COMBINATIONS OF WORK EQUIPMENT....289
UEAM002901 - Hydraulic Excavator PC750LC-7K, PC750SE-7K Operation & Maintenance Manual....290
COVER....290
FOREWORD....292
FOREWORD....293
SAFETY INFORMATION....294
NOISE....296
VIBRATION....296
BREAKING-IN THE NEW MACHINE....297
INTRODUCTION....298
DIRECTIONS OF MACHINE....298
PRODUCT INFORMATION....299
MACHINE SERIAL NUMBER PLATE AND ITS LOCATION....299
ENGINE SERIAL NUMBER PLATE AND ITS LOCATION....299
SERVICE METER LOCATION....300
TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR....300
MACHINE SERIAL PLATE....301
FOREWORD....302
SAFETY....302
OPERATION....303
MAINTENANCE....306
SPECIFICATIONS....308
ATTACHMENTS AND OPTIONS....308
LOADING SHOVEL....308
INDEX....309
COLOPHON....309
SAFETY....310
SAFETY INFORMATION....311
SAFETY LABELS....313
LOCATION OF SAFETY LABELS....314
SAFETY LABELS....315
SAFETY INFORMATION....322
SAFETY MACHINE OPERATION....332
STARTING ENGINE....332
OPERATION....334
TRANSPORTATION....341
BATTERY....342
TOWING....344
LIFTING OBJECTS WITH BUCKET....345
SAFETY MAINTENANCE INFORMATION....346
OPERATION....354
MACHINE VIEW ILLUSTRATIONS....356
OVERALL MACHINE VIEW....356
CONTROLS AND GAUGES....357
DETAILED CONTROLS AND GAUGES....359
MONITORING SYSTEM....359
Basic Operation Of Machine Monitor....360
Basic Check Monitors....362
Caution Monitors....364
Emergency Monitors....366
Meter Display Portion....368
Monitor Switches Portion....372
SWITCHES....382
CONTROL LEVERS AND PEDALS....389
SUN ROOF....393
Opening....393
Closing....393
WINDSHIELD....394
EMERGENCY EXIT FROM OPERATOR'S CAB....399
DOOR LOCK....399
CAP WITH LOCK....400
HOT AND COOL BOX....401
MAGAZINE BOX....401
ASHTRAY....402
AIR CONDITIONER CONTROLS....403
Air Conditioner Control Panel....403
Method Of Operation....408
Use Air Conditioner With Care....414
Air Conditioner Maintenance....414
Other Functions....415
CAB RADIO....416
Use Radio With Care....416
AUXILIARY ELECTRIC POWER....417
24V power source....417
12V power source....417
FUSE....418
CIRCUIT BREAKER....419
CONTROLLERS....420
TOOL BOX....420
GREASE PUMP....420
Method of Use....421
Precautions when Using....422
Supplying Grease....423
ACCUMULATOR....424
Releasing Hydraulic Pressure With Accumulator....424
MACHINE OPERATIONS AND CONTROLS....425
BEFORE STARTING ENGINE....425
Walk-Around Checks....425
Checks Before Starting....426
Adjustment....437
Seat Belt....439
Operations Before Starting Engine....440
STARTING ENGINE....443
Normal Starting....443
Starting Engine In Cold Weather....445
AFTER STARTING ENGINE....448
Warming-Up Operation....448
In Cold Weather Areas....452
STOPPING THE ENGINE....457
MACHINE OPERATION....458
Preparations For Moving The Machine Off....458
Moving Machine Forward....459
Moving Machine Backward....460
Stopping Machine....461
STEERING THE MACHINE....462
Steering....462
SWINGING....464
WORK EQUIPMENT CONTROLS AND OPERATIONS....465
WORKING MODE....467
PROHIBITED OPERATIONS....468
GENERAL OPERATION INFORMATION....470
TRAVELING ON SLOPES....472
ESCAPE FROM MUD....474
Stuck One Side Of Track....474
Stuck Both Sides Of Tracks....474
RECOMMENDED APPLICATIONS....475
Backhoe Work....475
Ditching Work....475
Loading Work....475
BUCKET REPLACEMENT....476
Replacement....476
PARKING MACHINE....478
CHECK AFTER SHUT OFF ENGINE....479
LOCKING....480
TRANSPORTATION....481
PRECAUTIONS FOR TRANSPORTATION....481
LIFTING MACHINE....481
SHIPPING MACHINE INFORMATION....483
TRANSPORTATION POSTURE....484
PROCEDURE FOR INCREASING OR REDUCING TRACK FRAME GAUGE....489
COLD WEATHER OPERATION....491
COLD WEATHER OPERATION INFORMATION....491
Fuel And Lubricants....491
AFTER DAILY WORK COMPLETION....493
AFTER COLD WEATHER SEASON....493
LONG TERM STORAGE....494
BEFORE STORAGE....494
DURING STORAGE....494
AFTER STORAGE....495
STARTING MACHINE AFTER LONG-TERM STORAGE....495
TROUBLES AND ACTIONS....496
RUNNING OUT OF FUEL....496
PHENOMENA THAT ARE NOT FAILURES....498
TOWING THE MACHINE....499
SEVERE JOB CONDITION....499
DISCHARGED BATTERY....500
Battery Removal And Installation....500
Battery Charges....501
Starting Engine With Booster Cables....502
OTHER TROUBLE....504
Electrical System....504
Chassis....505
Engine....506
Electronic Control System....508
Point Of Contact To Telephone When Error Occurs....509
MAINTENANCE....510
MAINTENANCE INFORMATION....511
LUBRICANTS, COOLANT AND FILTERS....513
HANDLING OIL, FUEL, COOLANT, AND PERFORMING OIL CLINIC....513
Oil....513
Fuel....513
Cooling System Coolant....514
Grease....514
Carrying out KOWA (Komatsu Oil Wear Analysis)....515
Oil And Fuel Storage....516
Filters....516
ELECTRIC SYSTEM MAINTENANCE....516
WEAR PARTS....517
WEAR PARTS LIST....518
LUBRICANTS, FUEL AND COOLANT SPECIFICATIONS....519
PROPER SELECTION....519
TIGHTENING TORQUE SPECIFICATIONS....523
TIGHTENING TORQUE LIST....523
SAFETY CRITICAL PARTS....524
SAFETY CRITICAL PARTS LIST....525
MAINTENANCE SCHEDULE....526
MAINTENANCE SCHEDULE CHART....526
MAINTENANCE PROCEDURE....528
INITIAL 100 HOURS MAINTENANCE (ONLY AFTER THE FIRST 100 HOURS)....528
INITIAL 500 HOURS MAINTENANCE (ONLY AFTER THE FIRST 500 HOURS)....528
WHEN REQUIRED....529
CHECK, CLEAN AND REPLACE AIR CLEANER ELEMENT....529
CLEAN INSIDE OF COOLING SYSTEM....534
CHECK AND TIGHTEN TRACK SHOE BOLTS....538
CHECK AND ADJUST TRACK TENSION....539
CHECK ELECTRICAL INTAKE AIR HEATER....541
REPLACE BUCKET TEETH (HORIZONTAL PIN TYPE)....541
ADJUST BUCKET CLEARANCE....542
REPLACE OF FAN BELT AND ADJUSTMENT OF AUTO TENSIONER....543
CHECK WINDOW WASHER FLUID LEVEL, ADD FLUID....544
CHECK AND ADJUST AIR CONDITIONER....545
CLEAN LINE FILTER, REMOVE DIRT....546
BLEEDING AIR FROM HYDRAULIC SYSTEM....547
METHOD FOR RELEASING INTERNAL PRESSURE IN HYDRAULIC CIRCUIT....550
CHECK NITROGEN GAS CHARGE PRESSURE IN ACCUMULATOR (control circuit)....551
CHECK BEFORE STARTING....552
EVERY 10 HOURS MAINTENANCE....553
LUBRICATING....553
EVERY 100 HOURS MAINTENANCE....556
LUBRICATING SWING CIRCLE....556
EVERY 250 HOURS MAINTENANCE....557
CHECK OIL LEVEL IN FINAL DRIVE CASE, ADD OIL....557
CHECK LEVEL OF BATTERY ELECTROLYTE....558
CHECK, CLEAN FUEL TANK STRAINER....561
CHECK AND TIGHTEN TRACK FRAME AND AXLE CONNECTING BOLTS....561
CHECK ALTERNATOR DRIVE BELT TENSION, ADJUST....562
CHECK AIR CONDITIONER COMPRESSOR BELT TENSION, ADJUST....563
EVERY 500 HOURS MAINTENANCE....564
REPLACE FUEL FILTER CARTRIDGE....564
REPLACEMENT OF ADDITIONAL FUEL FILTER CARTRIDGE (IF EQUIPPED)....565
CHECK SWING PINION GREASE LEVEL, ADD GREASE....567
CLEAN AND INSPECT RADIATOR FINS, OIL COOLER FINS, AFTER COOLER FINS, FUEL COOLER FINS, AND CONDENSER FINS (ONLY MACHINES EQUIPPED WITH AIR CONDITIONER)....568
CLEAN FRESH/RECIRC AIR FILTERS OF AIR CONDITIONER (ONLY FOR MACHINES EQUIPPED WITH AIR CONDITIONER)....569
REPLACE PILOT FILTER ELEMENT....571
CLEAN STRAINER OF P.T.O LUBRICATING OIL FILTER....572
CHECK FAN BELT....572
REPLACE DRAIN FILTER CARTRIDGE....573
CHANGE OIL IN ENGINE OIL PAN, REPLACE ENGINE OIL FILTER CARTRIDGE....574
EVERY 1000 HOURS MAINTENANCE....576
REPLACE BREATHER ELEMENT IN HYDRAULIC TANK....576
REPLACE HYDRAULIC OIL FILTER ELEMENT....577
CHANGE OIL IN SWING MACHINERY CASE....579
CHANGE OIL IN P.T.O CASE....581
CHECK ALL TIGHTENING PARTS OF TURBOCHARGER....581
CHECK PLAY TURBOCHARGER ROTOR....581
REPLACE CORROSION RESISTOR CARTRIDGE....582
LUBRICATING FAN PULLEY ASSEMBLY, TENSION PULLEY ASSEMBLY....582
CHECK WELDED STRUCTURE....583
CHECK NITROGEN GAS CHARGE PRESSURE IN ACCUMULATOR (for breaker)....585
EVERY 2000 HOURS MAINTENANCE....586
CHANGE OIL IN FINAL DRIVE CASE....586
CHECK INJECTOR....586
CLEAN HYDRAULIC TANK STRAINER....587
CLEAN ENGINE BREATHER....588
CLEAN, CHECK TURBOCHARGER....588
CHECK ALTERNATOR, STARTING MOTOR....588
CHECK ENGINE VALVE CLEARANCE, ADJUST....588
EVERY 4000 HOURS MAINTENENCE....589
CHECK WATER PUMP....589
CHECK VIBRATION DAMPER....589
CHECK FAN PULLEY AND TENSION PULLEY....589
CHECK FOR LOOSENESS OF HIGH-PRESSURE CLAMP, HARDENING OF RUBBER....589
REPLACE INJECTOR NOZZLE ASSEMBLY....590
CHECK FOR MISSING FUEL SPRAY PREVENTION CAP, HARDENING OF RUBBER....591
EVERY 5000 HOURS MAINTENANCE....592
CHANGE OIL IN HYDRAULIC TANK....592
EVERY 8000 HOURS MAINTENANCE....593
REPLACE HIGH-PRESSURE PIPING CLAMP....593
REPLACE FUEL SPRAY PREVENTION CAP....593
SPECIFICATIONS....594
SPECIFICATIONS....595
ATTACHMENTS AND OPTIONS....598
GENERAL PRECAUTIONS FOR SAFETY....599
PRECAUTIONS WHEN SELECTING....599
READ THE INSTRUCTION MANUAL THOROUGHLY....599
PRECAUTIONS WHEN REMOVING OR INSTALLING....599
PRECAUTIONS WHEN USING....600
ATTACHMENT GUIDE....601
COMBINATIONS OF WORK EQUIPMENT....601
Working Range Diagram....603
LOADING SHOVEL....604
GENERAL LOCATIONS....605
INSTRUMENTS AND CONTROLS....606
SWITCHES....606
OPERATION OF WORK EQUIPMENT....607
PRECAUTIONS FOR MACHINE OPERATION....609
PRECAUTONS DURING OPERATION....609
Phenomena that do not indicate failure....612
PRECAUTIONS WHEN DISASSEMBLING MACHINE....613
RELEASING PRESSURE....613
RELEASING PRESSURE FROM WORK EQUIPMENT CIRCUIT, SWING CIRCUIT, TRAVEL CIRCUIT....613
RELEASING PRESSURE IN ACCUMULATOR CIRCUIT....613
MAINTENANCE....614
CHECK BEFORE STARTING....614
CHECK OIL LEVEL IN HYDRAULIC TANK, ADD OIL....614
EVERY 10 HOURS SERVICE....616
LUBRICATING....616
CHANGE OIL IN HYDRAULIC TANK, CLEAN STRAINER....617
EXCAVATOR WORK....619
TRANSPORTATION....620
PARTS FOR TRANSPORT....620
CONSUMABLE PARTS LIST....621
SPECIFICATIONS....622
COMBINATIONS OF WORK EQUIPMENT....623
COMBINATIONS OF WORK EQUIPMENT....623
INDEX....624
<A>....626
<B>....626
<C>....626
<D>....626
<E>....626
<F>....626
<G>....626
<H>....626
<L>....626
<M>....626
<O>....626
<P>....626
<R>....627
<S>....627
<T>....627
<W>....627
<Y>....627
COLOPHON....628
UEBM001801 - Hydraulic Excavator PC750SE-6K, PC750LC-6K Shop Manual....630
GENERAL ....658
SPECIFICATION DRAWINGS ....659
FUEL, COOLANT AND LUBRICANTS ....667
PTO ....669
PTO LUBRICATION SYSTEM ....670
POWER TRAIN SWING MACHINERY SWING CIRCLE ....675
FINAL DRIVE ....677
TRACK FRAME AND RECOIL SPRING ....679
IDLER CARRIER ROLLER ....683
TRACK ROLLER ....684
TRACK SHOE ( 1/ 2) ....685
( 2/ 2) ....687
MOTOR GREASE PUMP ....690
HYDRAULIC TANK ....691
HYDRAULIC PUMP ....693
LINE OIL FILTER ....723
PILOT OIL FILTER ....723
DRAIN OIL FILTER ....724
L. H. 5- SPOOL CONTROL VALVE ....725
R. H. 4- SPOOL CONTROL VALVE ....731
STRAIGHT- TRAVEL VALVE ....737
SWING MOTOR ....740
CENTER SWIVEL JOINT ....745
TRAVEL MOTOR ....746
PPC CONTROL RELIEF VALVE ....756
SAFETY LOCK VALVE ....757
PPC ACCUMULATOR ....758
VALVE CONTROL ....759
WORK EQUIPMENT, SWING PPC VALVE ....760
TRAVEL PPC VALVE ....765
SOLENOID VALVE ....769
HYDRAULIC CYLINDER ....775
WORK EQUIPMENT ....779
DIMENSIONS OF WORK EQUIPMENT ....783
AIR CONDITIONER ....787
ENGINE CONTROL ....788
MACHINE CONTROL SYSTEM ....793
MONITOR SYSTEM ....821
SENSORS ....828
TESTING AND ADJUSTING ....832
STANDARD VALUE TABLE FOR ENGINE ....833
STANDARD VALUE TABLE FOR CHASSIS ....834
STANDARD VALUE TABLE FOR ELECTRICAL PARTS ....843
TOOLS FOR TESTING, ADJUSTING, AND TROUBLESHOOTING ....856
MEASURING AIR SUPPLY PRESSURE ( BOOST PRESSURE) ....859
MEASURING EXHAUST TEMPERATURE ....860
MEASURING EXHAUST COLOR ....861
ADJUSTING VALVE CLEARANCE ....862
MEASURING BLOW- BY PRESSURE ....863
MEASURING COMPRESSION PRESSURE ....863
MEASURING ENGINE OIL PRESSURE ....864
HANDLING EQUIPMENT IN FUEL CIRCUIT ....865
RELEASING REMAINING PRESSURE IN FUEL SYSTEM ....865
MEASURING FUEL PRESSURE ....866
REDUCED CYLINDER MODE OPERATION FOR ENGINE ....867
BLEEDING AIR FROM FUEL CIRCUIT ....869
CHECKING FOR LEAKAGE IN FUEL CIRCUIT ....871
TESTING AND ADJUSTING ALTERNATOR BELT TENSION ....872
TESTING AND ADJUSTING FAN BELT TENSION ....873
TESTING AND ADJUSTING AIR CONDITIONER COMPRESSOR DRIVE BELT TENSION ....874
HANDLING ENGINE CONTROL- LER HIGH VOLTAGE CIRCUIT ....875
ADJUSTING ENGINE SPEED SENSOR ....876
TESTING AND ADJUSTING HYDRAULIC PRESSURE IN WORK EQUIPMENT, SWING, TRAVEL CIRCUIT ....877
TESTING AND ADJUSTING CONTROL PUMP CIRCUIT OIL PRESSURE ....880
TESTING AND ADJUSTING PISTON PUMP CONTROL PRESSURE ....882
MEASURING SERVO PISTON STROKE ....888
MEASURING PPC VALVE OUT- PUT PRESSURE ....889
TESTING SOLENOID VALVE OUTPUT PRESSURE ....890
ADJUSTING WORK EQUIP- MENT, SWING PPC VALVE ....891
TESTING TRAVEL DEVIATION ....892
TESTING LOCATIONS CAUSING HYDRAULIC DRIFT OF WORK EQUIPMENT ....895
MEASURING OIL LEAKAGE ....896
TESTING CLEARANCE OF SWING CIRCLE BEARING ....901
TESTING AND ADJUSTING TRACK SHOE TENSION ....902
BLEEDING AIR ....903
RELEASING REMAINING PRESSURE IN HYDRAULIC CIRCUIT ....905
PROCEDURE FOR CHECKING DIODE ....906
POINTS TO REMEMBER WHEN TROUBLESHOOTING ....909
SEQUENCE OF EVENTS IN TROUBLESHOOTING POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE CHECKS BEFORE TROUBLESHOOTING ....919
CONNECTOR TYPES AND MOUNTING LOCATIONS ....920
CONNECTION TABLE FOR CONNECTOR PIN NUMBERS ....927
EXPLANATION OF CONTROL MECHANISM FOR ELECTRICAL SYSTEM ....950
DISPLAY METHOD AND SPECIAL FUNCTIONS OF MONITOR PANEL ....951
METHOD OF USING JUDGEMENT TABLE ....966
METHOD OF USING TROUBLESHOOTING CHARTS ....968
DETAILS OF TROUBLESHOOTING AND TROUBLESHOOTING PROCEDURE ....969
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE ....975
N- 1 [ E117, E118 occur at same time ] Monitor panel communication abnormality ....978
N- 2 [ E117, E218 occur at same time ] Engine controller communication abnormality ....980
N- 3 [ E118, E955 occur at same time ] Pump controller communication abnormality ....982
ACTION TAKEN BY CONTROLLER AND CONDITION OF MACHINE WHEN ERROR CODE IS DISPLAYED ....985
ACTION TAKEN BY CONTROLLER AND CONDITION OF MACHINE WHEN ERROR CODE IS DISPLAYED ....985
E- 1 [ E91b ] ( Abnormality in engine speed Ne sensor system) is displayed ....997
E- 2 [ E91C ] ( Abnormality in engine G rotation sensor system) is displayed ....998
E- 3 [ E920 ] ( Abnormality in model selection system) is displayed ....999
E- 4 [ E922 ] ( Engine overrun) is displayed ....1000
E- 5 [ E924 ] ( Drop in engine oil pressure) is displayed ....1001
E- 6 [ E931 ] ( Abnormality in fuel control dial sensor system) is displayed ....1002
E- 7 [ E934 ] ( Abnormality in engine water high- temperature sensor system) is displayed ....1003
E- 8 [ E936 ] ( Abnormality in engine oil pressure switch system) is displayed ....1004
E- 9 [ E93C ] ( Abnormality in boost pressure sensor system) is displayed ....1006
E- 10 [ E93d ] ( Abnormality in fuel temperature sensor system) is displayed ....1007
E- 11 [ E954 ] ( Short circuit in starting switch C system) is displayed ....1008
12 [ E955 ] ( Abnormality in network system) is displayed ....1008
E- 13 [ E956 ] ( Power source system abnormality 1) is displayed ....1009
E- 14 [ E957 ] ( Power source system abnormality 2) is displayed ....1011
15 [ E95A ] ( Abnormality in fuel injection amount adjustment switch signal) is displayed ....1011
E- 16 [ E96A ] ( Abnormality in engine water low- temperature sensor system) is displayed ....1012
E- 17 [ E970 ] ( Excess current in fuel supply pump PCV1 system) is displayed ....1013
E- 18 [ E971 ] ( Excess current in fuel supply pump PCV2 system) is displayed ....1014
E- 19 [ E974 ] ( Disconnection in fuel supply pump PCV1 system) is displayed ....1015
E- 20 [ E975 ] ( Disconnection in fuel supply pump PCV2 system) is displayed ....1016
E- 21 [ E977 ] ( Abnormality in common rail fuel pressure sensor system) is displayed ....1017
E- 22 [ E979 ] ( Common rail fuel high pressure abnormality 1) is displayed [ E97A ] ( Common rail fuel high pressure abnormality 2) is displayed ....1018
E- 23 [ E97b ] ( Fuel supply pump non- force feed 1) is displayed [ E97C ] ( Fuel supply pump non- force feed 2) is displayed ....1019
E- 24 [ E97d ] ( Abnormality in common rail fuel pressure) is displayed ....1021
E- 25 [ E980 ] ( Defective engine controller) is displayed ....1021
E- 26 [ E981 ] ( Disconnection in No. 1 fuel injector system) is displayed ....1022
E- 27 [ E982 ] ( Disconnection in No. 2 fuel injector system) is displayed ....1023
E- 28 [ E983 ] ( Disconnection in No. 3 fuel injector system) is displayed ....1024
E- 29 [ E984 ] ( Disconnection in No. 4 fuel injector system) is displayed ....1025
E- 30 [ E985 ] ( Disconnection in No. 5 fuel injector system) is displayed ....1026
E- 31 [ E986 ] ( Disconnection in No. 6 fuel injector system) is displayed ....1027
E- 32 [ E98A ] ( Short circuit in No. 1, No. 2, No. 3 fuel injector system) is displayed ....1028
E- 33 [ E98b ] ( Short circuit in No. 3, No. 4, No. 5 fuel injector system) is displayed ....1032
TROUBLESHOOTING OF PUMP CONTROLLER SYSTEM ( C MODE) ....1036
POINTS TO REMEMBER WHEN TROUBLESHOOTING CONTROLLER SYSTEM ....1037
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE ....1039
JUDGEMENT TABLE FOR PUMP CONTROLLER AND HYDRAULIC RELATED PARTS ....1047
POINTS TO REMEMBER WHEN TROUBLESHOOTING CONTROLLER SYSTEM ....1037
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE ....1039
JUDGEMENT TABLE FOR PUMP CONTROLLER AND HYDRAULIC RELATED PARTS ....1047
C- 1 Abnormality in controller power source system ( controller LED is OFF) ....1051
C- 1 Related electrical circuit diagram ....1051
TROUBLESHOOTING C- 2 ....1052
C- 2 [ E232 ] Short circuit in pump TVC solenoid system is displayed ....1052
TROUBLESHOOTING C- 2 C- 2 Related electrical circuit diagram TROUBLESHOOTING C- 3 ....1054
C- 3 [ E233 ] Disconnection in pump TVC solenoid system is displayed ....1054
TROUBLESHOOTING C- 3 C- 3 Related electrical circuit diagram TROUBLESHOOTING C- 4 ....1056
C- 4 [ E203 ] Short circuit in swing holding brake solenoid system is displayed ....1056
TROUBLESHOOTING C- 4 C- 4 Related electrical circuit diagram TROUBLESHOOTING C- 5 ....1058
C- 5 [ E213 ] Disconnection in swing holding brake solenoid system is displayed ....1058
TROUBLESHOOTING C- 5 C- 5 Related electrical circuit diagram TROUBLESHOOTING C- 6 ....1060
C- 6 [ E201 ] Short circuit in CO cancel solenoid system is displayed ....1060
C- 6 Related electrical circuit diagram ....1060
TROUBLESHOOTING C- 7 ....1061
C- 7 [ E211 ] Disconnection in CO cancel solenoid system is displayed ....1061
C- 7 Related electrical circuit diagram ....1061
TROUBLESHOOTING C- 8 ....1062
C- 8 [ E202 ] Short circuit in straight- travel solenoid system is displayed ....1062
C- 8 Related electrical circuit diagram ....1062
TROUBLESHOOTING C- 9 ....1063
C- 9 [ E212 ] Disconnection in straight- travel solenoid system is displayed ....1063
C- 9 Related electrical circuit diagram ....1063
TROUBLESHOOTING C- 10 ....1064
C- 10 [ E204 ] Short circuit in 2- stage relief solenoid system is displayed ....1064
C- 10 Related electrical circuit diagram ....1064
TROUBLESHOOTING C- 11 ....1065
C- 11 [ E214 ] Disconnection in 2- stage relief solenoid system is displayed ....1065
C- 11 Related electrical circuit diagram ....1065
TROUBLESHOOTING C- 12 ....1066
C- 12 [ E205 ] Short circuit in swing priority selector solenoid system is displayed ....1066
C- 12 Related electrical circuit diagram ....1066
TROUBLESHOOTING C- 13 ....1067
C- 13 [ E211 ] Disconnection in swing priority selector solenoid system is displayed ....1067
C- 13 Related electrical circuit diagram ....1067
TROUBLESHOOTING C- 14 ....1068
C- 14 [ E206 ] Short circuit in travel speed solenoid system is displayed ....1068
C- 14 Related electrical circuit diagram ....1068
TROUBLESHOOTING C- 15 ....1069
C- 15 [ E216 ] Disconnection in travel speed solenoid system is displayed ....1069
C- 15 Related electric circuit diagram ....1069
TROUBLESHOOTING C- 16 ....1070
C- 16 [ E217 ] Model selection input error is displayed ....1070
TROUBLESHOOTING C- 16 C- 16 Related electrical circuit diagram TROUBLESHOOTING C- 17 ....1072
C- 17 [ E227 ] Abnormality in engine speed sensor system is displayed ....1072
C- 17 Related electrical circuit diagram ....1072
TROUBLESHOOTING C- 18 ....1073
C- 18 Abnormality in machine push- up solenoid system ( no service code displayed) ....1073
a) Even when machine push- up switch is set to low pressure, solenoid is not switched ON ....1073
C- 19 Related electrical circuit diagram ....1073
TROUBLESHOOTING C- 18 b) Even when machine push- up switch is set to high pressure, solenoid is not switched OFF ....1074
C- 18 Related electrical circuit diagram ....1074
TROUBLESHOOTING C- 19 ....1075
C- 19 Abnormality in shockless boom solenoid system ( no service code displayed) ....1075
a) Shockless mode cannot be canceled ( solenoid is not switched ON) ....1075
TROUBLESHOOTING C- 19 C- 19 Related electrical circuit diagram ....1076
TROUBLESHOOTING C- 19 ....1077
b) Shockless mode is not actuated ....1077
C- 19 Related electric circuit diagram TROUBLESHOOTING C- 20 C- 20 Related electrical circuit diagram ....1078
C- 20 [ E207 ] Short circuit in flash light relay drive system is displayed ....1078
TROUBLESHOOTING C- 21 ....1079
C- 21 Flash light relay does not work ....1079
C- 21 Related electrical circuit diagram ....1079
TROUBLESHOOTING C- 22 ....1080
C- 22 [ E231 ] Abnormality ( short circuit) in power source holding relay output system for step light is displayed ....1080
C- 22 Related electrical circuit diagram ....1080
TROUBLESHOOTING C- 23 ....1081
C- 23 Step light switch does not work ....1081
C- 23 Related electrical circuit diagram ....1081
TROUBLESHOOTING C- 24 ....1082
C- 24 [ E302 ] Short circuit in step light relay drive system is displayed ....1082
C- 24 Related electrical circuit diagram ....1082
TROUBLESHOOTING C- 25 ....1083
C- 25 [ 303 ] Disconnection in step light relay drive system is displayed ....1083
C- 25 Related electrical circuit diagram ....1083
TROUBLESHOOTING C- 26 ....1084
C- 26 Step light does not light up ....1084
C- 26 Related electrical circuit diagram ....1084
TROUBLESHOOTING C- 27 ....1085
C- 27 [ E228 ] Abnormality in auto- deceleration output system is displayed ....1085
C- 27 Related electrical circuit diagram ....1085
TROUBLESHOOTING OF ENGINE THROTTLE & PUMP CONTROLLER ( INPUT SIGNAL SYSTEM) ( F MODE) ....1086
F- 1 [ Bit pattern 20- ( 1) ] Swing oil pressure switch does not light up ....1089
TROUBLESHOOTING F- 2 F- 2 Related electrical circuit diagram ....1090
F- 2 [ Bit pattern 20- ( 2) ] R. H. travel oil pressure switch does not light up ....1090
F- 3 Related electrical circuit diagram TROUBLESHOOTING F- 3 ....1091
F- 3 [ Bit pattern 20- ( 3) ] Boom LOWER oil pressure switch does not light up ....1091
TROUBLESHOOTING F- 4 F- 4 Related electrical circuit diagram ....1092
F- 4 [ Bit pattern 20- ( 4) ] Boom RAISE oil pressure switch does not light up ....1092
F- 5 Related electrical circuit diagram TROUBLESHOOTING F- 5 ....1093
F- 5 [ Bit pattern 20- ( 5) ] Arm IN oil pressure switch does not light up ....1093
TROUBLESHOOTING F- 6 F- 6 Related electrical circuit diagram ....1094
F- 6 [ Bit pattern 20- ( 6) ] Arm OUT oil pressure switch does not light up ....1094
F- 7 Related electrical circuit diagram TROUBLESHOOTING F- 7 ....1095
F- 7 [ Bit pattern 21- ( 1) ] Bucket CURL oil pressure switch does not light up ....1095
TROUBLESHOOTING F- 8 F- 8 Related electrical circuit diagram ....1096
F- 8 [ Bit pattern 21- ( 2) ] Bucket DUMP oil pressure switch does not light up ....1096
F- 9 Related electrical circuit diagram TROUBLESHOOTING F- 9 ....1097
F- 9 [ Bit pattern 20- ( 5) ] L. H. travel oil pressure switch does not light up ....1097
TROUBLESHOOTING F- 10 F- 10 Related electrical circuit diagram ....1098
F- 10 [ Bit pattern 21- ( 4) ] Service oil pressure switch does not light up ....1098
F- 11 Related electrical circuit diagram TROUBLESHOOTING F- 11 ....1099
F- 11 [ Bit pattern 21- ( 3) ] Swing lock switch does not light up ....1099
TROUBLESHOOTING F- 12 F- 12 Related electrical circuit diagram ....1100
F- 12 [ Bit pattern 24- ( 1) ] When step light switch is ON, it does not go out ....1100
F- 13 Related electrical circuit diagram TROUBLESHOOTING F- 13 ....1101
F- 13 [ Bit pattern 24- ( 2) ] When horn switch is ON, it does not go out ....1101
TABLE OF FAILURE MODES AND CAUSES ....1103
TROUBLESHOOTING TABLE OF FAILURE MODES AND CAUSES ....1104
BEFORE CARRYING OUT TROUBLESHOOTING OF HYDRAULIC SYSTEM ( H MODE) ....1105
1. Actuation and combination of main pumps ....1105
2. Judgement procedure ....1105
BEFORE CARRYING OUT TROUBLESHOOTING TROUBLESHOOTING OF HYDRAULIC SYSTEM ( H MODE) ....1105
BEFORE CARRYING OUT TROUBLESHOOTING TROUBLESHOOTING OF HYDRAULIC SYSTEM ( H MODE) TROUBLESHOOTING BEFORE CARRYING OUT TROUBLESHOOTING OF HYDRAULIC SYSTEM ( H MODE) Hydraulic circuit diagram after interchanging hoses Method of interchanging hoses TROUBLESHOOTING ....1108
TROUBLESHOOTING H- 2 ....1109
TROUBLESHOOTING H- 2 ....1110
TROUBLESHOOTING H- 3 ....1111
H- 3 Related circuit diagram ....1111
TROUBLESHOOTING H- 4, H- 5 ....1112
TROUBLESHOOTING H- 6 ....1113
a) If work equipment speed ( boom, arm, bucket) is slow or lacks power in normal mode ....1113
TROUBLESHOOTING H- 6 b) If boom RAISE speed is slow or lacks power in heavy lift mode ....1114
c) If boom LOWER speed is slow or lacks power when machine push- up is ON TROUBLESHOOTING H- 7, H- 8 ....1115
TROUBLESHOOTING H- 9, H- 10, H- 11 ....1116
TROUBLESHOOTING H- 12 ....1117
TROUBLESHOOTING H- 13 ....1118
a) Direction of deviation is same in FORWARD and REVERSE ....1118
TROUBLESHOOTING H- 13 b) Direction of deviation is different in FORWARD and REVERSE ....1119
TROUBLESHOOTING H- 14 ....1120
TROUBLESHOOTING H- 14, H- 15 ....1121
TROUBLESHOOTING H- 16, H- 17 ....1122
TROUBLESHOOTING H- 18 ....1123
TROUBLESHOOTING H- 18 ....1124
TROUBLESHOOTING H- 19 ....1125
TROUBLESHOOTING H- 19, H- 20 ....1126
TROUBLESHOOTING H- 21 ....1127
TROUBLESHOOTING H- 22 ....1128
TROUBLESHOOTING H- 23 ....1129
TROUBLESHOOTING H- 24 ....1130
TROUBLESHOOTING H- 25 ....1131
a) When swing holding brake is released ....1131
ACTION TAKEN BY MONITOR PANEL WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE ....1133
M- 1 [ E101 ] ( Abnormality in error data) or [ E102 ] ( Abnormality in clock data) is displayed ....1137
M- 2 [ E103 ] ( Short circuit in buzzer output system) is displayed ....1138
M- 3 [ E104 ] ( Air cleaner clogging detection) is displayed ....1139
M- 4 [ E108 ] ( Engine water temperature 105 ....1139
C) is displayed ....1139
M- 5 When starting switch is turned ON, none of lamps on monitor panel light up for 3 seconds ....1140
M- 6 When starting switch is turned ON, monitor panel lamps all stay lighted up and do not go out ....1142
M- 7 When starting switch is turned ON, items lighted up on monitor panel are different from actual machine ....1142
M- 8 When starting switch is turned ON ( engine stopped) , basic check items flash ....1143
M- 9 Preheating is not being used but preheating display motor lamp lights up ....1146
M- 10 When engine is started, basic check items flash ....1147
M- 11 When starting switch is turned ON ( engine stopped) , CAUTION items and EMERGENCY STOP items flash ....1148
M- 12 When engine is started, CAUTION items and EMERGENCY STOP items flash ....1149
M- 13 Operation of alarm buzzer is not normal ....1153
M- 14 Night lighting on monitor panel does not light up ....1155
M- 15 Engine water temperature display is not normal ....1156
M- 16 Fuel level gauge display is not normal ....1157
M- 17 Swing lock switch is turned ON but swing lock monitor lamp does not light up ....1159
M- 18 When swing brake release switch is set to RELEASE ( EMERGENCY) , swing lock monitor lamp does not flash ....1160
M- 19 Service meter does not give normal display ....1161
M- 20 Defective fuel level sensor system ....1162
M- 21 Defective engine oil level sensor system ....1163
M- 22 Defective coolant level sensor system ....1164
M- 23 Defective hydraulic oil level sensor system ....1165
M- 24 Wiper is not actuated when wiper switch is operated or wiper is actuated when wiper switch is not operated ....1166
M- 25 Window washer is not actuated when wiper switch is operated or window washer is actuated when switch is not operated ....1171
M- 26 Electric grease gun does not work ( machines equipped with electric grease gun) ....1174
METHOD OF USING MANUAL ....1177
1. When removing or installing unit assemblies ....1177
2. ....1177
3. Listing of special tools ....1177
A1 ....1177
DISASSEMBLY AND ASSEMBLY METHOD OF USING MANUAL ....1178
6. Tightening torque of split flange bolts ....1178
5. Tightening torque of hose nuts ....1178
4. Standard tightening torques of bolts and nuts DISASSEMBLY AND ASSEMBLY METHOD OF USING MANUAL ....1179
7. Tightening torque of O- ring boss connector ....1179
8. Tightening torque of O- ring boss connector ....1179
DISASSEMBLY AND ASSEMBLY PRECAUTIONS WHEN CARRYING OUT OPERATION ....1180
PRECAUTIONS WHEN CARRYING OUT OPERATION ....1180
1. Precautions when carrying out removal work ....1180
SPECIAL TOOL LIST ....1182
SKETCHES OF SPECIAL TOOLS ....1189
REMOVAL OF AFTERCOOLER CORE ....1191
INSTALLATION OF AFTERCOOLER CORE ....1191
REMOVAL OF FAN GUARD, RADIATOR AND HYDRAULIC OIL COOLER ASSEMBLY ....1192
INSTALLATION OF FAN GUARD, RADIATOR AND HYDRAULIC OIL COOLER ASSEMBLY ....1194
Water Filling ....1194
Filling ( Hydraulic Tank) with Oil ....1194
Filling of Air Conditioner Gas ....1194
Alignment of Engine Pulley and Fan Pulley ....1194
Filling ( Fuel Tank) with Diesel Fuel ....1194
REMOVAL OF FUEL COOLER AND AIR CONDITIONER CONDENSER ASSEMBLY ....1195
INSTALLATION OF FUEL COOLER AND AIR CONDITIONER CONDENSER ASSEMBLY ....1195
REMOVAL OF FUEL TANK ASSEMBLY ....1196
INSTALLATION OF FUEL TANK ASSEMBLY ....1197
REMOVAL OF ENGINE, PTO AND HYDRAULIC PUMP ASSEMBLY ....1198
INSTALLATION OF ENGINE, PTO AND HYDRAULIC PUMP ASSEMBLY ....1202
Water Filling ....1202
Air Bleeding ....1202
REMOVAL OF PTO ASSEMBLY ....1203
INSTALLATION OF PTO ASSEMBLY ....1204
DISASSEMBLY OF PTO ASSEMBLY ....1205
1. Cover ....1205
2. Gear assembly ....1205
3. Removal of bearing ....1205
ASSEMBLY OF PTO ASSEMBLY ....1206
1. Bearings ....1206
2. Outer race at case end ....1206
3. Nipples, plug ....1206
4. Gears ....1206
DISASSEMBLY OF FINAL DRIVE ASSEMBLY ....1209
ASSEMBLY OF FINAL DRIVE ASSEMBLY ....1214
REMOVAL OF REVOLVING FRAME ASSEMBLY ....1222
INSTALLATION OF REVOLVING FRAME ASSEMBLY ....1223
REMOVAL OF SWING MACHINERY ASSEMBLY ....1224
INSTALLATION OF SWING MACHINERY ASSEMBLY ....1224
DISASSEMBLY OF SWING MACHINERY ASSEMBLY ....1225
ASSEMBLY OF SWING MACHINERY ASSEMBLY ....1229
REMOVAL OF SWING CIRCLE ASSEMBLY ....1234
INSTALLATION OF SWING CIRCLE ASSEMBLY ....1234
REMOVAL OF TRACK SHOE ASSEMBLY ....1235
INSTALLATION OF TRACK SHOE ASSEMBLY ....1236
DISASSEMBLY OF ONE LINK IN FIELD ....1237
FIELD ASSEMBLY OF ONE LINK ....1239
REMOVAL OF IDLER ASSEMBLY ....1241
INSTALLATION OF IDLER ASSEMBLY ....1241
DISASSEMBLY OF IDLER ASSEMBLY ....1242
ASSEMBLY OF IDLER ASSEMBLY ....1244
DISASSEMBLY OF IDLER ADJUSTMENT CYLINDER ASSEMBLY ....1246
ASSEMBLY OF IDLER ADJUSTMENT CYLINDER ASSEMBLY ....1246
REMOVAL OF RECOIL SPRING ASSEMBLY ....1247
INSTALLATION OF RECOIL SPRING ASSEMBLY ....1247
DISASSEMBLY OF RECOIL SPRING ASSEMBLY ....1249
ASSEMBLY OF RECOIL SPRING ASSEMBLY ....1250
REMOVAL OF CARRIER ROLLER ASSEMBLY ....1251
INSTALLATION OF CARRIER ROLLER ASSEMBLY ....1251
DISASSEMBLY OF CARRIER ROLLER ASSEMBLY ....1252
ASSEMBLY OF CARRIER ROLLER ASSEMBLY ....1253
REMOVAL OF TRACK ROLLER ASSEMBLY ....1254
INSTALLATION OF TRACK ROLLER ASSEMBLY ....1254
DISASSEMBLY OF TRACK ROLLER ASSEMBLY ....1255
ASSEMBLY OF TRACK ROLLER ASSEMBLY ....1256
REMOVAL OF HYDRAULIC TANK ASSEMBLY ....1258
INSTALLATION OF HYDRAULIC TANK ASSEMBLY ....1260
REMOVAL OF MAIN PUMP ( NO. 1 PUMP) ASSEMBLY ....1261
INSTALLATION OF MAIN PUMP ( NO. 1 PUMP) ASSEMBLY ....1262
REMOVAL OF MAIN PUMP ( NO. 2 PUMP) ....1263
INSTALLATION OF MAIN PUMP ( NO. 2 PUMP) ASSEMBLY ....1264
REMOVAL OF MAIN PUMP INPUT SHAFT OIL SEAL ....1265
INSTALLATION OF MAIN PUMP INPUT SHAFT OIL SEAL ....1265
REMOVAL OF CONTROL PTO LUBRICATION PUMP ASSEMBLY ....1266
INSTALLATION OF CONTROL PTO LUBRICATION PUMP ASSEMBLY ....1266
DISASSEMBLY OF MAIN RELIEF VALVE ASSEMBLY ....1267
ASSEMBLY OF MAIN RELIEF VALVE ASSEMBLY ....1267
REMOVAL OF CONTROL VALVE ASSEMBLY ....1268
INSTALLATION OF CONTROL VALVE ASSEMBLY ....1270
DISASSEMBLY OF CONTROL VALVE ASSEMBLY ( WORK EQUIPMENT) ....1272
ASSEMBLY OF CONTROL VALVE ASSEMBLY ( WORK EQUIPMENT) ....1274
REMOVAL OF SOLENOID VALVE ASSEMBLY ....1276
INSTALLATION OF SOLENOID VALVE ASSEMBLY ....1277
REMOVAL OF BOOM DAMPING VALVE ASSEMBLY ....1278
INSTALLATION OF BOOM DAMPING VALVE ASSEMBLY ....1278
REMOVAL OF SWING MOTOR ASSEMBLY ....1279
INSTALLATION OF SWING MOTOR ASSEMBLY ....1279
REMOVAL OF CENTER SWIVEL JOINT ....1280
INSTALLATION OF CENTER SWIVEL JOINT ASSEMBLY ....1280
DISASSEMBLY OF CENTER SWIVEL JOINT ASSEMBLY ....1281
ASSEMBLY OF CENTER SWIVEL JOINT ASSEMBLY ....1281
REMOVAL OF TRAVEL MOTOR ASSEMBLY ....1282
INSTALLATION OF TRAVEL MOTOR ASSEMBLY ....1282
DISASSEMBLY OF WORK EQUIPMENT PPC VALVE ASSEMBLY ....1283
ASSEMBLY OF WORK EQUIPMENT PPC VALVE ASSEMBLY ....1284
DISASSEMBLY OF TRAVEL PPC VALVE ASSEMBLY ....1285
ASSEMBLY OF TRAVEL PPC VALVE ASSEMBLY ....1286
REMOVAL OF BUCKET CYLINDER ASSEMBLY ....1287
INSTALLATION OF BUCKET CYLINDER ASSEMBLY ....1289
REMOVAL OF ARM CYLINDER ASSEMBLY ....1291
INSTALLATION OF ARM CYLINDER ASSEMBLY ....1293
REMOVAL OF BOOM CYLINDER ASSEMBLY ....1295
INSTALLATION OF BOOM CYLINDER ASSEMBLY ....1297
REMOVAL OF BOTTOM DUMP CYLINDER ASSEMBLY ....1299
INSTALLATION OF BOTTOM DUMP CYLINDER ASSEMBLY ....1300
DISASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLY ....1301
ASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLY ....1303
REMOVAL OF BUCKET ASSEMBLY ....1306
INSTALLATION OF BUCKET ASSEMBLY ....1308
REMOVAL OF ARM ASSEMBLY ....1310
INSTALLATION OF ARM ASSEMBLY ....1312
REMOVAL OF BOOM ASSEMBLY ....1314
INSTALLATION OF BOOM ASSEMBLY ....1316
REMOVAL OF WORK EQUIPMENT ....1318
INSTALLATION OF WORK EQUIPMENT ASSEMBLY ....1320
REMOVAL OF OPERATOR S CAB ASSEMBLY ....1322
INSTALLATION OF OPERATOR S CAB ASSEMBLY ....1323
REMOVAL OF COUNTERWEIGHT ASSEMBLY ....1324
INSTALLATION OF COUNTERWEIGHT ASSEMBLY ....1324
UEBM002400 - Hydraulic Excavator PC750SE-7K, PC750LC-7K Shop Manual....1331
Foreword.pdf....0
SAFETY....1333
SAFETY NOTICE....1333
IMPORTANT SAFETY NOTICE....1333
GENERAL PRECAUTIONS....1333
PREPARATIONS FOR WORK....1333
PRECAUTIONS DURING WORK....1334
FOREWORD....1335
GENERAL....1335
STRUCTURE AND FUNCTION....1335
TESTING AND ADJUSTING....1335
DISASSEMBLY AND ASSEMBLY....1335
MAINTENANCE STANDARD....1335
OTHERS....1335
HOW TO READ THE SHOP MANUAL....1336
VOLUMES....1336
DISTRIBUTION AND UPDATING....1336
FILING METHOD....1336
REVISED EDITION MARK....1336
REVISIONS....1336
SYMBOLS....1336
HOISTING INSTRUCTIONS....1337
HOISTING....1337
WIRE ROPES....1337
METHOD OF DISASSEMBLING, CONNECTING PUSH-PULL TYPE COUPLER....1338
Disconnection....1338
Connection....1338
COATING MATERIALS....1340
STANDARD TIGHTENING TORQUE....1342
STANDARD TIGHTENING TORQUE TABLE (WHEN USING TORQUE WRENCH)....1342
TABLE OF TIGHTENING TORQUES FOR FLARED NUTS....1342
TABLE OF TIGHTENING TORQUES FOR SPLIT FLANGE BOLTS....1343
TABLE OF TIGHTENING TORQUES FOR O-RING BOSS PIPING JOINTS....1343
TABLE OF TIGHTENING TORQUES FOR O-RING BOSS PLUGS....1343
TIGHTENING TORQUE FOR 102 ENGINE SERIES (BOLT AND NUTS)....1344
TIGHTENING TORQUE FOR 102 ENGINE SERIES (EYE JOINTS)....1344
TIGHTENING TORQUE FOR 102 ENGINE SERIES (TAPERED SCREWS)....1344
ELECTRIC WIRE CODE....1345
CLASSIFICATION BY THICKNESS....1345
CLASSIFICATION BY COLOR AND CODE....1345
CONVERSION TABLE....1346
METHOD OF USING THE CONVERSION TABLE....1346
EXAMPLE....1346
Millimeters to inches....1346
Millimeters to Inches....1347
Kilogram to Pound....1347
Liter to U.S. Gallon....1348
Liter to U.K. Gallon....1348
kgm to ft. lb....1349
kg/cm2 to lb/in2....1350
Temperature....1351
UNITS....1352
Example:....1352
01.pdf....0
01 GENERAL....1353
SPECIFICATION DRAWINGS....1354
SPECIFICATIONS....1356
WEIGHT TABLE....1361
FUEL, COOLANT AND LUBRICANTS....1363
10.pdf....0
10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD....1365
PTO....1366
PTO LUBRICATION SYSTEM....1367
POWER TRAIN....1368
SWING MACHINERY....1370
SWING CIRCLE....1372
FINAL DRIVE....1374
TRACK FRAME AND RECOIL SPRING....1376
IDLER....1378
CARRIER ROLLER....1380
TRACK ROLLER....1381
TRACK SHOE....1382
MOTOR GREASE PUMP....1387
HYDRAULIC TANK....1388
HYDRAULIC PUMP....1390
RETURN OIL FILTER....1420
LINE OIL FILTER....1421
PILOT OIL FILTER....1421
DRAIN OIL FILTER....1422
L.H. 5-SPOOL CONTROL VALVE....1424
R.H. 4-SPOOL CONTROL VALVE....1430
STRAIGHT-TRAVEL VALVE....1436
SWING MOTOR....1439
CENTER SWIVEL JOINT....1444
TRAVEL MOTOR....1445
PPC CONTROL RELIEF VALVE....1455
PPC ACCUMULATOR....1456
VALVE CONTROL....1457
WORK EQUIPMENT, SWING PPC VALVE....1458
TRAVEL PPC VALVE....1464
SOLENOID VALVE....1468
HYDRAULIC CYLINDER....1474
WORK EQUIPMENT....1476
DIMENSIONS OF WORK EQUIPMENT....1478
AIR CONDITIONER....1480
ENGINE CONTROL....1481
MACHINE CONTROL SYSTEM....1487
MONITOR SYSTEM....1516
SENSORS....1531
20.pdf....0
20 TESTING AND ADJUSTING....1535
STANDARD VALUE TABLE FOR ENGINE....1534
STANDARD VALUE TABLE FOR CHASSIS....1537
20_101.pdf....0
TESTING AND ADJUSTING....1547
TOOLS FOR TESTING, ADJUSTING AND TROUBLESHOOTING....1366
MEASURING ENGINE SPEED....1550
MEASURING INTAKE AIR PRESSURE (BOOST PRESSURE)....1551
MEASUREMENT OF EXHAUST GAS TEMPERATURE....1552
MEASUREMENT OF EXHAUST GAS COLOR....1553
ADJUSTING VALVE CLEARANCE....1554
MEASURING COMPRESSION PRESSURE....1534
MEASURING BLOW-BY PRESSURE....1557
MEASURING ENGINE OIL PRESSURE....1558
HANDLING OF FUEL SYSTEM EQUIPMENT....1559
REMAINING PRESSURE RELIEF FROM FUEL SYSTEM EQUIPMENT....1559
MEASUREMENT OF FUEL PRESSURE....1560
AIR BLEEDING FROM FUEL CIRCUIT....1561
INSPECTION OF LEAKAGE FROM FUEL SYSTEM....1563
ADJUSTING ENGINE SPEED SENSOR....1544
TESTING AND ADJUSTING FAN BELT TENSION....1565
TESTING AND ADJUSTING ALTERNATOR BELT TENSION....1566
TESTING AND ADJUSTING AIR CONDITIONER COMPRESSOR BELT....1567
INSPECTION OF SWING CIRCLE BEARING CLEARANCE....1568
TESTING AND ADJUSTING TRACK SHOE TENSION....1569
TESTING AND ADJUSTING WORK EQUIPMENT, SWING, AND TRAVEL CIRCUIT OIL PRESSURES....1570
TESTING AND ADJUSTING CONTROL CIRCUIT OIL PRESSURE....1575
TESTING AND ADJUSTING PISTON PUMP CONTROL PRESSURE....1543
INSPECTION OF SERVO PISTON STROKE....1582
MEASUREMENT OF PPC VALVE OUTPUT PRESSURE....1583
MEASURING OUTLET PRESSURES OF SOLENOID VALVE, SWING PPC SHUTTLE VALVE, AND SWING PRIORITY SELECTO.....1586
ADJUSTING WORK EQUIPMENT, SWING PPC VALVE....1591
TESTING AND ADJUSTING TRAVEL DEVIATION....1592
INSPECTION OF LOCATIONS OF HYDRAULIC DRIFT OF WORK EQUIPMENT....1594
MEASURING OIL LEAKAGE....1595
RELEASE OF RESIDUAL PRESSURE FROM HYDRAULIC CIRCUIT....1599
BLEEDING AIR FROM EACH PART....1600
INSPECTION PROCEDURES FOR DIODE....1603
SPECIAL FUNCTION OF MONITOR PANEL....1604
HANDLING ENGINE CONTROLLER HIGH VOLTAGE CIRCUIT....1631
PREPARATION WORK....1632
20_101A.pdf....0
Pm-CLINIC SERVICE....1634
Positions to install measuring devices (Related to engine and PTO)....1548
Positions to install measuring devices (Related to relief pressure and OLSS oil pressure)....1637
Pm-CLINIC SERVICE PC750 (LC, SE)....1640
Arm....1640
1. Arm cylinder bracket....1640
2. Arm foot....1640
3. Arm top boss....1640
Boom....1640
4. Boom top bracket....1640
5. Boom cylinder bracket....1640
6. Arm cylinder bracket....1640
7. Boom lower plate....1640
8. Boom foot....1640
Revolving frame....1640
9. Boom bracket....1640
Track frame....1640
10. Circle bracket....1640
11. Track frame mounting section....1640
Visual check of welded structures (For PC750SE-7)....1641
Arm....1641
1. Arm cylinder bracket....1641
2. Arm foot....1641
3. Arm top boss....1641
Boom....1641
4. Boom top bracket....1641
5. Boom cylinder bracket....1641
6. Arm cylinder bracket....1641
7. Boom lower plate....1641
8. Boom foot....1641
Revolving frame....1641
9. Boom bracket....1641
Track frame....1641
10. Circle bracket....1641
11. Track frame mounting section....1641
UNDERCARRIAGE INSPECTION....1642
(Program form No.: ***************)....1642
20_201.pdf....0
TROUBLESHOOTING....1547
POINTS TO REMEMBER WHEN TROUBLESHOOTING....1644
SEQUENCE OF EVENTS IN TROUBLESHOOTING....1640
POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE....1646
CHECKS BEFORE TROUBLESHOOTING....1654
CLASSIFICATION AND STEPS FOR TROUBLESHOOTING....1655
Classification of troubleshooting....1611
Steps for troubleshooting....1611
Failure-looking Phenomenon and Troubleshooting No....1656
CONNECTOR LOCATION CHART AND ELECTRICAL CIRCUIT DIAGRAM BY SYSTEM....1659
Connector table....1659
Connector Location Stereogram....1664
Monitor Panel System Circuit Diagram (M Circuit)....1670
Engine Control System Circuit Diagram (E Ciruit)....1672
Pump Controller System Circuit Diagram (P Circuit)....1674
CONNECTION TABLE FOR CONNECTOR PIN NUMBERS....1676
T-BRANCH BOX AND T-BRANCH TABLE....1698
20_301.pdf....0
TROUBLESHOOTING WHEN ERROR CODE "ELECTRICAL SYSTEM" AND FAILURE CODE "MECHANICAL SYSTEM" ARE DISP.....1701
BEFORE CARRYING OUT TROUBLESHOOTING OF DISPLAYED CODE....1617
INFORMATION CONTAINED IN TROUBLESHOOTING TABLE....1706
Error Code in Electrical System E112 (Wiper Drive (For) S/C)....1708
Error Code in Electrical System E113 (Wiper Drive (Rev) S/C)....1712
Error Code in Electrical System E114 (Washer Drive S/C)....1714
Error Code in Electrical System E115 (Wiper Working Abnormality)....1716
Error Code in Electrical System E116 (Wiper Parking Abnormality)....1718
Error Code in Electrical System E117 (Eng. Controller S-NET Comm Err.)....1722
Error Code in Electrical System E118 (Pump Controller S-NET Comm Err.)....1724
Error Code in Electrical System E128 (Monitor Comm. Abnormality)....1726
Error Code in Electrical System E201 (CO Cancel Sol. S/C)....1728
Error Code in Electrical System E202 (Travel Junction Sol. S/C)....1730
Error Code in Electrical System E203 (Swing Brake Sol. S/C)....1732
Error Code in Electrical System E204 (2-stage Relief Sol. S/C)....1734
Error Code in Electrical System E205 (Swing Priority Sol. S/C)....1736
Error Code in Electrical System E206 (Travel Speed Sol. S/C)....1738
Error Code in Electrical System E207 (Flash Light Relay S/C)....1740
Error Code in Electrical System E211 (CO Cancel Sol. Disc.)....1742
Error Code in Electrical System E212 (Travel Junction Sol. Disc.)....1744
Error Code in Electrical System E213 (Swing Brake Sol. Disc.)....1746
Error Code in Electrical System E214 (2-stage Relief Sol. Disc.)....1748
Error Code in Electrical System E215 (Swing Priority Sol. Disc.)....1750
Error Code in Electrical System E216 (Travel Speed Sol. Disc.)....1752
Error Code in Electrical System E217 (Model selection Abnormality)....1754
Error Code in Electrical System E218 (S-Net Comm. Disc.)....1756
Error Code in Electrical System E221 (Travel Alarm S/C)....1758
Error Code in Electrical System E224 (F Pump P. Sensor Abnormality)....1760
Error Code in Electrical System E225 (R Pump P. Sensor Abnormality)....1762
Error Code in Electrical System E226 (Press. Sensor Power Abnormality)....1764
Error Code in Electrical System E227 (Engine Speed Sensor Abnormality)....1766
Error Code in Electrical System E232 (TVC Sol. S/C)....1768
Error Code in Electrical System E233 (TVC Sol. Disc.)....1770
Error Code in Electrical System E257 (Pump Comm. Abnormality)....1772
Error Code in Electrical System E302 (Step Light Relay S/C)....1774
Error Code in Electrical System E304 (Step Light Power Hold Relay S/C)....1776
Error Code in Electrical System E315 (Battery Relay Drive S/C)....1778
Error Code in Electrical System E91B (Engine Ne sensor problem)....1780
Error Code in Electrical System E91C (Engine G sensor problem)....1781
Error Code in Electrical System E920 (Engine type selection error)....1782
Error Code in Electrical System E921 (Engine type mismatch)....1784
Error Code in Electrical System E931 (Fuel dial sys. error)....1786
Error Code in Electrical System E934 (Engine coolant sensor Hi error)....1788
Error Code in Electrical System E936 (Engine oil press. sw. error)....1790
Error Code in Electrical System E93C (Engine boost sensor error)....1792
Error Code in Electrical System E93D (Engine fuel temp. sensor error)....1794
Error Code in Electrical System E953 (Engine Comm. Abnormality)....1796
Error Code in Electrical System E954 (Short engine starter sw.)....1798
Error Code in Electrical System E955 (Engine S-NET error)....1800
Error Code in Electrical System E956 (Engine power failure (1))....1802
Error Code in Electrical System E957 (Engine power failure (2))....1804
Error Code in Electrical System E95A (Engine Q-adj. sw. signal error)....1806
Error Code in Electrical System E96A (Engine coolant sensor Lo error)....1808
Error Code in Electrical System E970 (PCV1 over current)....1810
Error Code in Electrical System E971 (PCV2 over current)....1812
Error Code in Electrical System E974 (PCV1 line cut)....1814
Error Code in Electrical System E975 (PCV2 line cut)....1816
Error Code in Electrical System E977 (Rail press. sensor error)....1818
Error Code in Electrical System E979 (Rail press. high)....1820
Error Code in Electrical System E97A (Rail press. abnormal)....1820
Error Code in Electrical System E97B (Rail press. low)....1821
Error Code in Electrical System E97C (Rail press. too low)....1823
Error Code in Electrical System E97D (Rail press. out of control)....1823
Error Code in Electrical System E980 (Eng. Controller Abnormality)....1824
Error Code in Electrical System E981 (Fuel Injector 1 Disc.)....1826
Error Code in Electrical System E982 (Fuel Injector 2 Disc.)....1827
Error Code in Electrical System E983 (Fuel Injector 3 Disc.)....1828
Error Code in Electrical System E984 (Fuel Injector 4 Disc.)....1829
Error Code in Electrical System E985 (Fuel Injector 5 Disc.)....1830
Error Code in Electrical System E986 (Fuel Injector 6 Disc.)....1831
Error Code in Electrical System E98A (Fuel Injector 1 3 S/C)....1832
Error Code in Electrical System E98B (Fuel Injector 4 6 S/C)....1834
Failure Code in Mechanical System A000N1 (Eng. Hi Out of Std)....1837
Failure Code in Mechanical System AA10NX (Aircleaner Clogging)....1838
Failure Code in Mechanical System AB00KE (Charge Voltage Low)....1840
Failure Code in Mechanical System B@BAZG (Eng. Oil Press. Low)....1842
Failure Code in Mechanical System B@BAZK (Eng. Oil Level Low)....1844
Failure Code in Mechanical System B@BCNS (Eng. Water Overheat)....1845
Failure Code in Mechanical System B@BCZK (Eng. Water Lvl Low)....1846
Failure Code in Mechanical System B@HANS (Hydr. Oil Overheat)....1848
Failure Code in Mechanical System DA80MA (Auto. Lub Abnormal.)....1850
20_501.pdf....0
TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE)....1701
BEFORE CARRYING OUT TROUBLESHOOTING (E-MODE)....1617
INFORMATION CONTAINED IN TROUBLESHOOTING TABLE....1854
E-1 Engine does not start (Engine does not rotate)....1708
E-2 Preheater does not operate....1858
E-3 Auto engine warm-up device does not work....1860
E-4 Auto-decelerator does not operate....1861
E-5 All work equipment, swing and travel do not move....1862
E-6 Machine push-up function does not operate normally....1864
E-7 Boom shockless function does not operate normally....1866
E-8 Any item is not displayed on monitor panel....1868
E-9 Part of display on monitor panel is missing....1869
E-10 Monitor panel displays contents irrelevant to the model....1869
E-11 Fuel level monitor red lamp lights up while engine is running....1870
E-12 Engine water thermometer does not display normally....1872
E-13 Hydraulic oil temperature gauge does not display correctly....1874
E-14 Fuel gauge does not display correctly....1875
E-15 Swing lock monitor does not display correctly....1876
E-16 When monitor switch is operated, nothing is displayed....1878
E-17 Windshield wiper and window washer do not work....1880
E-18 Alarming buzzer cannot be cancelled....1888
E-19 "Boom RAISE" is not correctly displayed in monitor function....1889
E-20 "Boom LOWER" is not correctly displayed in monitor function....1890
E-21 "Arm IN" is not correctly displayed in monitor function....1891
E-22 "Arm OUT" is not correctly displayed in monitor function....1892
E-23 "Bucket CURL" is not correctly displayed in monitor function....1893
E-24 "Bucket DUMP" is not correctly displayed in monitor function....1894
E-25 "SWING" is not correctly displayed in monitor function....1896
E-26 "Left travel" is not displayed normally in monitoring function....1898
E-27 "Right travel" is not displayed normally in monitoring function....1900
E-28 "Service" is not correctly displayed in monitor function....1902
E-29 Air conditioner does not work....1904
E-30 Step light does not light up or go off....1905
E-31 Electric grease gun does not operate....1910
E-32 Travel alarm does not sound or does not stop sounding....1912
20_601.pdf....0
TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (H MODE)....1701
BEFORE TROUBLESHOOTING FOR HYDRAULIC AND MECHANICAL SYSTEMS (H MODE)....1916
INFORMATION IN TROUBLESHOOTING TABLE....1921
H-1 Speed or power of all work equipment, travel, and swing is low....1708
H-2 Engine speed lowers remarkably or engine stalls....1924
H-3 All work equipment, travel, and swing systems do not work....1860
H-4 Abnormal sound is heard from around pump....1926
H-5 Boom speed or power is low....1861
H-6 Speed or power of arm is low....1929
H-7 Speed or power of bucket is low....1930
H-8 Boom does not move....1931
H-9 Arm does not move....1931
H-10 Bucket does not move....1931
H-11 Hydraulic drift of work equipment is large....1932
H-12 Time lag of work equipment is large....1934
H-13 Heavy lift function does not operate or stop....1935
H-14 Machine push-up function does not operate or stop....1935
H-15 Boom shockless function cannot be turned ON or OFF....1935
H-16 Machine deviates in one direction....1936
H-17 Machine deviates largely at start....1938
H-18 Machine deviates largely during compound operation....1939
H-19 Travel speed or power is low....1939
H-20 Machine does not travel (only one track)....1940
H-21 Travel speed does not change....1941
H-22 Upper structure does not swing....1942
H-23 Swing speed or acceleration is low....1943
H-24 Swing speed or acceleration is low during compound operation of swing and work equipment....1944
H-25 Upper structure overruns excessively when it stops swinging....1946
H-26 Large shock is made when upper structure stops swinging....1947
H-27 Large abnormal sound is made when upper structure stops swinging....1948
H-28 Hydraulic drift of swing is large....1949
20_701.pdf....0
TROUBLESHOOTING OF ENGINE (S MODE)....1701
POINTS TO REMEMBER WHEN TROUBLESHOOTING....1952
METHOD OF USING TROUBLESHOOTING CHARTS....1953
S-1 Starting performance is poor (starting always takes time)....1956
S-2 Engine does not start....1957
S-3 Engine does not pick up smoothly (follow-up is poor)....1960
S-4 Engine stops during operations....1961
S-5 Engine does not rotate smoothly (hunting)....1962
S-6 Engine lacks output (or lacks power)....1963
S-7 Exhaust smoke is black (incomplete combustion)....1964
S-8 Oil consumption is excessive (or exhaust smoke is blue)....1965
S-9 Oil becomes contaminated quickly....1966
S-10 Fuel consumption is excessive....1967
S-11 Oil is in cooling water (or water spurts back, or water level goes down)....1968
S-12 Oil pressure caution lamp lights up (drop in oil pressure)....1969
S-13 Oil level rises (water, fuel in oil)....1970
S-14 Water temperature becomes too high (overheating)....1971
S-15 Abnormal noise is made....1972
S-16 Vibration is excessive....1973
30.pdf....0
30 DISASSEMBLY AND ASSEMBLY....1975
METHOD OF USING MANUAL....1977
PRECAUTIONS WHEN CARRYING OUT OPERATION....1979
SPECIAL TOOL LIST....1981
REMOVAL AND INSTALLATION OF AFTERCOOLER CORE....1988
REMOVAL AND INSTALLATION OF FAN GUARD, RADIATOR AND HYDRAULIC OIL COOLER ASSEMBLY....1989
REMOVAL AND INSTALLATION OF FUEL COOLER AND AIR CONDITIONER CONDENSER ASSEMBLY....1992
REMOVAL AND INSTALLATION OF FUEL TANK ASSEMBLY....1993
REMOVAL AND INSTALLATION OF ENGINE, PTO AND HYDRAULIC PUMP ASSEMBLY....1994
REMOVAL AND INSTALLATION OF PTO ASSEMBLY....1998
DISASSEMBLY AND ASSEMBLY OF PTO ASSEMBLY....2000
DISASSEMBLY AND ASSEMBLY OF FINAL DRIVE ASSEMBLY....2003
REMOVAL AND INSTALLATION OF REVOLVING FRAME ASSEMBLY....2014
REMOVAL AND INSTALLATION OF SWING MACHINERY ASSEMBLY....2015
DISASSEMBLY AND ASSEMBLY OF SWING MACHINERY ASSEMBLY....2016
REMOVAL AND INSTALLATION OF SWING CIRCLE ASSEMBLY....2023
REMOVAL AND INSTALLATION OF TRACK SHOE ASSEMBLY....2024
DISASSEMBLY AND ASSEMBLY OF ONE LINK IN FIELD....2026
REMOVAL AND INSTALLATION OF IDLER ASSEMBLY....2030
DISASSEMBLY AND ASSEMBLY OF IDLER ASSEMBLY....2031
DISASSEMBLY AND ASSEMBLY OF IDLER ADJUSTMENT CYLINDER ASSEMBLY....2034
REMOVAL AND INSTALLATION OF RECOIL SPRING ASSEMBLY....2035
DISASSEMBLY AND ASSEMBLY OF RECOIL SPRING ASSEMBLY....2037
REMOVAL AND INSTALLATION OF CARRIER ROLLER ASSEMBLY....2039
DISASSEMBLY AND ASSEMBLY OF CARRIER ROLLER ASSEMBLY....2040
REMOVAL AND INSTALLATION OF TRACK ROLLER ASSEMBLY....2043
DISASSEMBLY AND ASSEMBLY OF TRACK ROLLER ASSEMBLY....2044
REMOVAL AND INSTALLATION OF HYDRAULIC TANK ASSEMBLY....2047
REMOVAL AND INSTALLATION OF MAIN PUMP (NO. 1 PUMP) ASSEMBLY....2049
REMOVAL AND INSTALLATION OF MAIN PUMP (NO. 2 PUMP)....2051
REMOVAL AND INSTALLATION OF MAIN PUMP INPUT SHAFT OIL SEAL....2053
REMOVAL AND INSTALLATION OF CONTROL AND PTO LUBRICATION PUMP ASSEMBLY....2054
DISASSEMBLY AND ASSEMBLY OF MAIN RELIEF VALVE ASSEMBLY....2055
REMOVAL AND INSTALLATION OF CONTROL VALVE ASSEMBLY....2056
DISASSEMBLY AND ASSEMBLY OF CONTROL VALVE ASSEMBLY (WORK EQUIPMENT)....2059
REMOVAL AND INSTALLATION OF SOLENOID VALVE ASSEMBLY....2062
REMOVAL AND INSTALLATION OF BOOM DAMPING VALVE ASSEMBLY....2064
REMOVAL AND INSTALLATION OF SWING MOTOR ASSEMBLY....2065
REMOVAL AND INSTALLATION OF CENTER SWIVEL JOINT....2067
DISASSEMBLY AND ASSEMBLY OF CENTER SWIVEL JOINT ASSEMBLY....2068
REMOVAL AND INSTALLATION OF TRAVEL MOTOR ASSEMBLY....2070
DISASSEMBLY AND ASSEMBLY OF WORK EQUIPMENT PPC VALVE ASSEMBLY....2071
DISASSEMBLY AND ASSEMBLY OF TRAVEL PPC VALVE ASSEMBLY....2073
REMOVAL AND INSTALLATION OF BUCKET CYLINDER ASSEMBLY....2075
REMOVAL AND INSTALLATION OF BUCKET CYLINDER ASSEMBLY....2077
REMOVAL AND INSTALLATION OF ARM CYLINDER ASSEMBLY....2079
REMOVAL AND INSTALLATION OF ARM CYLINDER ASSEMBLY....2081
REMOVAL AND INSTALLATION OF BOOM CYLINDER ASSEMBLY....2083
REMOVAL AND INSTALLATION OF BOOM CYLINDER ASSEMBLY....2085
REMOVAL AND INSTALLATION OF BOTTOM DUMP CYLINDER ASSEMBLY....2087
DISASSEMBLY AND ASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLY....2088
REMOVAL AND INSTALLATION OF BUCKET ASSEMBLY....2094
REMOVAL AND INSTALLATION OF BUCKET ASSEMBLY....2095
REMOVAL AND INSTALLATION OF ARM ASSEMBLY....2096
REMOVAL AND INSTALLATION OF ARM ASSEMBLY....2098
REMOVAL AND INSTALLATION OF BOOM ASSEMBLY....2100
REMOVAL AND INSTALLATION OF BOOM ASSEMBLY....2102
REMOVAL AND INSTALLATION OF WORK EQUIPMENT....2104
REMOVAL AND INSTALLATION OF WORK EQUIPMENT....2106
REMOVAL AND INSTALLATION OF OPERATORS CAB ASSEMBLY....2108
REMOVAL AND INSTALLATION OF OPERATORS CAB GLASS (STUCK GLASS)....2110
REMOVAL AND INSTALLATION OF FRONT WINDOW ASSEMBLY....2120
REMOVAL AND INSTALLATION OF COUNTERWEIGHT ASSEMBLY....2126
90.pdf....0
90 OTHERS....1353
90-01.pdf....0
HYDRAULIC CIRCUIT DIAGRAM....2131
ELECTRICAL CIRCUIT DIAGRAM (1/5)....2133
ELECTRICAL CIRCUIT DIAGRAM (2/5)....2135
ELECTRICAL CIRCUIT DIAGRAM (3/5)....2137
ELECTRICAL CIRCUIT DIAGRAM (4/5)....2139
ELECTRICAL CIRCUIT DIAGRAM (5/5)....2141
