Komatsu PC400-8R,PC400LC-8R,PC450-8R,PC450LC-8R Hydraulic Shop Manual PDF

Description

Komatsu PC400-8R,PC400LC-8R,PC450-8R,PC450LC-8R Hydraulic Excavator Shop Manual SEN04239-18 – PDF DOWNLOAD

FILE DETAILS:

Komatsu PC400-8R,PC400LC-8R,PC450-8R,PC450LC-8R Hydraulic Excavator Shop Manual SEN04239-18 – PDF DOWNLOAD

Language : English
Pages : 1066
Downloadable : Yes
File Type : PDF

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TABLE OF CONTENTS:

Komatsu PC400-8R,PC400LC-8R,PC450-8R,PC450LC-8R Hydraulic Excavator Shop Manual SEN04239-18 – PDF DOWNLOAD

• SERIAL NUMBERS
  PC400- 75001            and up
  PC400LC- 75001       and up
  PC450- 75001          and up
  PC450LC- 75001      and up

Cover 1
00 INDEX AND FOREWORD 3
INDEX 3
Composition of shop manual . 4
Table of contents 6
FOREWORD AND GENERAL INFORMATION . 15
Safety notice 16
How to read the shop manual 21
Explanation of terms for maintenance standard 23
Handling of electric equipment and hydraulic component . 25
Handling of connectors newly used for engines 34
How to read electric wire code . 37
Precautions when carrying out operation 40
Method of disassembling and connecting push-pull type coupler 43
Standard tightening torque table . 46
Conversion table . 50
01 SPECIFICATION . 57
SPECIFICATION AND TECHNICAL DATA . 57
SPECIFICATION DIMENSION DRAWINGS . 58
SPECIFICATIONS . 60
WEIGHT TABLE . 64
TABLE OF FUEL, COOLANT AND LUBRICANTS 68
10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD 71
ENGINE AND COOLING SYSTEM 71
ENGINE RELATED PARTS . 72
RADIATOR, OIL COOLER AND AFTERCOOLER . 73
POWER TRAIN 75
POWER TRAIN 76
SWING CIRCLE . 77
SWING MACHINERY 78
FINAL DRIVE 80
SPROCKET . 82
UNDERCARRIAGE AND FRAME 85
TRACK FRAME AND RECOIL SPRING 86
IDLER 88
CARRIER ROLLER . 90
TRACK ROLLER . 91
TRACK SHOE . 92
HYDRAULIC SYSTEM, PART 1 . 97
Hydraulic equipment layout drawing . 98
Hydraulic tank and filter 100
Hydraulic pump . 102
HYDRAULIC SYSTEM, PART 2 . 127
CONTROL VALVE 128
CLSS . 140
FUNCTIONS AND OPERATION BY VALVE . 144
Merge-divider valve 159
ATTACHMENT CIRCUIT SELECTOR VALVE 184
HOLDING VALVE 186
HYDRAULIC SYSTEM, PART 3 . 193
Valve control 194
PPC valve 196
Solenoid valve . 212
PPC accumulator 214
Anti-drop valve for boom . 216
Anti-drop valve for arm 222
Return oil filter 229
Center swivel joint 230
Travel motor . 231
Swing motor 243
Hydraulic cylinder . 252
WORK EQUIPMENT . 255
Work equipment . 256
Dimensions of components . 258
CAB AND ITS ATTACHMENTS 263
AIR CONDITIONER PIPING . 264
Electrical system 267
Engine control . 268
Electronic control system 278
Monitor system . 303
Sensors 330
KOMTRAX system . 333
20 STANDARD VALUE TABLE 337
STANDARD SERVICE VALUE TABLE . 337
STANDARD VALUE TABLE FOR ENGINE RELATED PARTS 338
STANDARD VALUE TABLE FOR CHASSIS RELATED PARTS . 339
30 TESTING AND ADJUSTING . 351
TESTING AND ADJUSTING, PART 1 351
TOOLS FOR TESTING, ADJUSTING AND TROUBLESHOOTING . 353
SKETCHES OF SPECIAL TOOLS 357
MEASURING ENGINE SPEED . 358
MEASURING AIR BOOST PRESSURE . 359
MEASURING EXHAUST GAS TEMPERATURE 360
MEASURING EXHAUST GAS COLOR 361
ADJUSTING VALVE CLEARANCE 362
MEASURING COMPRESSION PRESSURE . 364
MEASURING BLOW-BY PRESSURE . 366
TESTING ENGINE OIL PRESSURE 367
HANDLING FUEL SYSTEM PARTS . 368
RELEASING RESIDUAL PRESSURE FROM FUEL SYSTEM . 368
MEASURING FUEL PRESSURE 369
HANDLING DURING CYLINDER CUT-OUT OPERATION . 370
HANDLING DURING NO INJECTION CRANKING OPERATION 370
TESTING FUEL RETURN AND LEAKAGE 371
BLEEDING AIR FROM FUEL CIRCUIT . 374
TESTING AND CHARGING ACCUMULATOR (MANUFACTURED BY NOK) NITROGEN GAS PRESSURE FOR ATTACHMENT (LOW PRESSURE SIDE) 378
TESTING AND CHARGING ACCUMULATOR NITROGEN GAS PRESSURE FOR ATTACHMENT (HIGH PRESSURE SIDE) . 380
REPLACING ACCUMULATOR BLADDER ON HIGH PRESSURE SIDE FOR ACCUMULATOR PIPING . 382
CHECKING FUEL CIRCUIT FOR LEAKAGE 387
CHECKING AND ADJUSTING FAN BELT AND ALTERNATOR BELT 388
CHECKING AND ADJUSTING AIR CONDITIONER COMPRESSOR BELT TENSION . 389
MEASURING SWING CIRCLE BEARING CLEARANCE . 390
CHECKING AND ADJUSTING TRACK SHOE TENSION 391
MEASURING AND ADJUSTING OIL PRESSURE IN WORK EQUIPMENT, SWING, AND TRAVEL CIRCUITS . 392
MEASURING CONTROL CIRCUIT BASIC PRESSURE . 396
CHECKING AND ADJUSTING PUMP PC CONTROL CIRCUIT OIL PRESSURE 397
CHECKING AND ADJUSTING PUMP LS CONTROL CIRCUIT OIL PRESSURE 400
MEASURING SOLENOID VALVE OUTPUT PRESSURE . 405
MEASURING PPC VALVE OUTPUT PRESSURE 408
ADJUSTING PLAY OF WORK EQUIPMENT AND SWING PPC VALVES 409
INSPECTING LOCATIONS OF HYDRAULIC DRIFT OF WORK EQUIPMENT 410
RELEASING RESIDUAL PRESSURE FROM HYDRAULIC CIRCUIT . 412
MEASURING OIL LEAKAGE AMOUNT . 413
BLEEDING AIR FROM VARIOUS PARTS 416
TESTING AND ADJUSTING, PART 2 421
SPECIAL FUNCTIONS OF MACHINE MONITOR . 422
TESTING AND ADJUSTING, PART 3 477
HANDLING VOLTAGE CIRCUIT OF ENGINE CONTROLLER 478
PREPARATION WORK FOR TROUBLESHOOTING OF ELECTRICAL SYSTEM 479
PROCEDURE FOR TESTING DIODES . 484
PM CLINIC SERVICE 485
40 TROUBLESHOOTING . 493
FAILURE CODE TABLE AND FUSE LOCATIONS 493
FAILURE CODES TABLE 494
FUSE LOCATIONS . 497
GENERAL INFORMATION ON TROUBLESHOOTING . 501
POINTS TO REMEMBER WHEN TROUBLESHOOTING 502
SEQUENCE OF EVENTS IN TROUBLESHOOTING 503
CHECKS BEFORE TROUBLESHOOTING 504
CLASSIFICATION AND TROUBLESHOOTING STEPS . 505
INFORMATION IN TROUBLESHOOTING TABLE . 506
CONNECTION TABLE FOR CONNECTOR PIN NUMBERS . 511
T- BRANCH BOX AND T- BRANCH ADAPTER TABLE 547
Troubleshooting by failure code (Display of code), Part 1 551
Failure code [AA10NX] Air cleaner Clogging . 554
Failure code [AB00KE] Charge Voltage Low . 556
Failure code [B@BAZG] Eng Oil Press. Low . 558
Failure code [B@BAZK] Eng Oil Level Low 561
Failure code [B@BCNS] Eng. Water Overheat 562
Failure code [B@BCZK] Eng Water Level Low 564
Failure code [B@HANS] Hydr Oil Overheat 566
Failure code [CA111] EMC Critical Internal Failure . 567
Failure code [CA115] Eng Ne and Bkup Speed Sens Error 567
Failure code [CA122] Chg Air Press Sensor High Error . 568
Failure code [CA123] Chg Air Press Sensor Low Error 570
Failure code [CA131] Throttle Sensor High Error 572
Failure code [CA132] Throttle Sensor Low Error . 574
Failure code [CA135] Eng Oil Press Sensor High Error . 576
Failure code [CA141] Eng Oil Press Sensor Low Error 579
Failure code [CA144] Coolant Temp Sens High Error 580
Failure code [CA145] Coolant Temp Sens Low Error . 582
Failure code [CA153] Chg Air Temp Sensor High Error 584
Failure code [CA154] Chg Air Temp Sensor Low Error . 586
Failure code [CA187] Sens Supply 2 Volt Low Error 588
Failure code [CA221] Ambient Press Sens High Error . 590
Failure code [CA222] Ambient Press Sens Low Error 592
Failure code [CA227] Sens Supply 2 Volt High Error . 594
Failure code [CA234] Eng Overspeed . 595
Failure code [CA238] Ne Speed Sens Supply Volt Error . 597
Failure code [CA263] Fuel Temp Sensor High Error . 598
Failure code [CA265] Fuel Temp Sensor Low Error 600
Failure code [CA271] IMV/PCV1 Short Error 601
Failure code [CA272] IMV/PCV1 Open Error . 602
Failure code [CA273] PCV2 Short Error 604
Failure code [CA274] PCV2 Open Error . 606
Failure code [CA322] Inj #1 Open/Short Error . 608
Failure code [CA323] Inj #5 Open/Short Error . 610
Failure code [CA324] Inj #3 Open/Short Error . 612
Failure code [CA325] Inj #6 Open/Short Error . 614
Failure code [CA331] Inj #2 Open/Short Error . 616
Failure code [CA332] Inj #4 Open/Short Error . 618
Troubleshooting by failure code (Display of code), Part 2 621
Failure code [CA342] Calibration Code Incompatibility 623
Failure code [CA351] Injectors Drive Circuit Error . 624
Failure code [CA352] Sens Supply 1 Volt Low Error 626
Failure code [CA386] Sens Supply 1 Volt High Error . 628
Failure code [CA441] Battery Voltage Low Error . 630
Failure code [CA442] Battery Voltage High Error 632
Failure code [CA449] Rail Press Very High Error 634
Failure code [CA451] Rail Press Sensor High Error 638
Failure code [CA452] Rail Press Sensor Low Error . 640
Failure code [CA553] Rail Press High Error . 642
Failure code [CA554] Rail Press Sensor In Range Error 643
Failure code [CA559] Rail Press Low Error 644
Failure code [CA689] Eng Ne Speed Sensor Error . 646
Failure code [CA731] Eng Bkup Speed Sens Phase Error . 648
Failure code [CA757] All Persistent Data Lost Error 650
Failure code [CA778] Eng Bkup Speed Sensor Error . 652
Failure code [CA1633] KOMNET Datalink Timeout Error 654
Failure code [CA2185] Throt Sens Sup Volt High Error . 656
Failure code [CA2186] Throt Sens Sup Volt Low Error 657
Failure code [CA2249] Rail Press Very Low Error 658
Failure code [CA2555] Grid Htr Relay Volt High Error . 660
Failure code [CA2556] Grid Htr Relay Volt Low Error 662
Failure code [D110KB] Battery Relay Drive S/C 664
Failure code [D196KA] Service Return Relay Disc 666
Failure code [D196KB] Service Return Relay S/C . 668
Failure code [DA25KP] 5V sensor power supply output 1 abnormality 670
Failure code [DA2SKQ] Model Selection Abnormality 673
Troubleshooting by failure code (Display of code), Part 3 677
Failure code [DA2RMC] CAN discon (Pump con detected) . 680
Failure code [DAFRMC] CAN discon (Monitor detected) 682
Failure code [DHPAMA] F Pump Press Sensor Abnormality 684
Failure code [DHPBMA] R Pump Press Sensor Abnormality 686
Failure code [DHS3MA] Arm Curl PPC Sen. Abnormality 688
Failure code [DHS4MA] Bucket Curl PPC Press Sensor Abnormality . 690
Failure code [DW43KA] Travel Speed Sol. Disc . 692
Failure code [DW43KB] Travel Speed Sol. S/C 694
Failure code [DW45KA] Swing Brake Sol. Disc 696
Failure code [DW45KB] Swing Brake Sol. S/C . 700
Failure code [DW91KA] Travel Junction Sol. Disc 702
Failure code [DW91KB] Travel Junction Sol. S/C . 704
Failure code [DWA2KA] Attachment Sol Open Circuit 706
Failure code [DWJ0KA] Merge-divider Sol. Disc 707
Failure code [DWJ0KB] Merge-divider Sol. S/C . 709
Failure code [DWK0KA] 2-stage Relief Sol. Disc . 711
Failure code [DWK0KB] 2-stage Relief Sol. S/C 713
Failure code [DXA0KA] PC-EPC Sol. Disc . 715
Failure code [DXA0KB] PC-EPC Sol. S/C 717
Failure code [DXE0KA] LS-EPC Sol. Disc . 719
Failure code [DXE0KB] LS-EPC Sol. S/C 721
Failure code [DXE4KA] Service Current EPC Disc . 723
Failure code [DXE4KB] Service Current EPC S/C 724
Failure code [DY20KA] Wiper Working Abnormality 725
Failure code [DY20MA] Wiper Parking Abnormality 727
Failure code [DY2CKB] Washer Drive Short . 729
Failure code [DY2DKB] Wiper Drive (For) Short 731
Failure code [DY2EKB] Wiper Drive (Rev) Short 733
TROUBLESHOOTING OF ELECTRICAL SYSTEM (E-MODE) 735
BEFORE CARRYING OUT TROUBLESHOOTING OF ELECTRICAL SYSTEM . 738
INFORMATION CONTAINED IN TROUBLESHOOTING TABLE . 740
E-1 ENGINE DOES NOT START 741
E-2 AUTO-DECELERATOR DOES NOT OPERATE 744
E-3 AUTOMATIC WARMING-UP SYSTEM DOES NOT OPERATE . 746
E-4 PREHEATER DOES NOT OPERATE . 748
E-5 ALL WORK EQUIPMENT, SWING, AND TRAVEL MECHANISM DO NOT MOVE 750
E-6 POWER MAXIMIZING FUNCTION DOES NOT OPERATE . 752
E-7 MACHINE MONITOR DOES NOT DISPLAY AT ALL 754
E-8 MACHINE MONITOR DOES NOT DISPLAY SOME ITEMS 756
E-9 CONTENTS OF DISPLAY BY MACHINE MONITOR ARE DIFFERENT FROM APPLICABLE MACHINE . 756
E-10 FUEL LEVEL MONITOR WAS LIGHTED IN RED WHILE ENGINE RUNNING 757
E-11 ENGINE COOLANT TEMPERATURE GAUGE DOES NOT INDICATE NORMALLY . 758
E-12 HYDRAULIC OIL TEMPERATURE GAUGE DOES NOT INDICATE NORMALLY 760
E-13 FUEL LEVEL GAUGE DOES NOT INDICATE NORMALLY . 761
E-14 SWING LOCK MONITOR DOES NOT INDICATE NORMALLY . 762
E-15 WHEN MONITOR SWITCH IS OPERATED, MONITOR DISPLAYS NOTHING . 764
E-16 WINDSHIELD WIPER AND WINDOW WASHER DO NOT OPERATE . 766
E-17 MACHINE PUSH-UP FUNCTION DOES NOT OPERATE NORMALLY 770
E-18 MONITORING FUNCTION FAILS TO DISPLAY “ BOOM RAISE ” NORMALLY 772
E-19 MONITORING FUNCTION FAILS TO DISPLAY “ BOOM LOWER ” NORMALLY 774
E-20 MONITORING FUNCTION FAILS TO DISPLAY “ ARM IN ” NORMALLY 776
E-21 MONITORING FUNCTION FAILS TO DISPLAY “ ARM OUT ” NORMALLY . 778
E-22 MONITORING FUNCTION FAILS TO DISPLAY “ BUCKET CURL ” NORMALLY . 780
E-23 MONITORING FUNCTION FAILS TO DISPLAY “ BUCKET DUMP ” NORMALLY . 782
E-24 MONITORING FUNCTION FAILS TO DISPLAY “ SWING ” NORMALLY . 784
E-25 MONITORING FUNCTION FAILS TO DISPLAY “ TRAVEL ” NORMALLY 786
E-26 MONITORING FUNCTION FAILS TO DISPLAY “ TRAVEL DIFFERENTIAL PRESSURE ” NORMALLY 788
E-27 MONITORING FUNCTION FAILS TO DISPLAY “ SERVICE ” NORMALLY . 790
E-28 KOMTRAX SYSTEM DOES NOT OPERATE NORMALLY 792
E-29 AIR CONDITIONER DOES NOT OPERATE 794
E-30 TRAVEL ALARM DOES NOT SOUND OR DOES NOT STOP SOUNDING . 796
E-31 HORN DOES NOT SOUND . 798
E-32 ELECTRIC PRIMING PUMP DOES NOT OPERATE OR DOES NOT STOP AUTOMATICALLY . 800
TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (H-MODE) 803
SYSTEM CHART FOR HYDRAULIC AND MECHANICAL SYSTEM . 806
INFORMATION CONTAINED IN TROUBLESHOOTING TABLE . 808
H-1 ALL WORK EQUIPMENT LACK POWER, OR TRAVEL AND SWING SPEEDS ARE SLOW . 810
H-2 ENGINE SPEED SHARPLY DROPS OR ENGINE STALLS 812
H-3 NO WORK EQUIPMENT, SWING OR TRAVEL MOVE 813
H-4 ABNORMAL NOISE IS HEARD FROM AROUND HYDRAULIC PUMP . 813
H-5 AUTO-DECELERATOR DOES NOT WORK . 814
H-6 FINE CONTROL MODE DOES NOT FUNCTION OR RESPONDS SLOW . 814
H-7 BOOM MOVES SLOWLY OR LACKS POWER . 815
H-8 ARM MOVES SLOWLY OR LACKS POWER 816
H-9 BUCKET MOVES SLOWLY OR LACKS POWER . 817
H-10 WORK EQUIPMENT DOES NOT MOVE IN ITS SINGLE OPERATION 817
H-11 WORK EQUIPMENT HAS A BIT TOO FAST HYDRAULIC DRIFT . 818
H-12 WORK EQUIPMENT HAS BIG TIME LAG . 820
H-13 OTHER WORK EQUIPMENT MOVES WHEN RELIEVING SINGLE CIRCUIT 820
H-14 POWER MAX. SWITCH DOES NOT OPERATE 820
H-15 MACHINE PUSH-UP FUNCTION DOES NOT OPERATE . 821
H-16 IN COMPOUND OPERATION OF WORK EQUIPMENT, SPEED OF PART LOADED MORE IS LOW . 822
H-17 WHEN MACHINE SWINGS AND RAISES BOOM SIMULTANEOUSLY, BOOM RISING SPEED IS LOW 822
H-18 WHEN MACHINE SWINGS AND TRAVELS SIMULTANEOUSLY, TRAVEL SPEED LOWERS LARGELY . 822
H-19 MACHINE DEVIATES DURING TRAVEL 823
H-20 TRAVEL SPEED IS LOW . 824
H-21 MACHINE IS NOT STEERED WELL OR STEERING POWER IS LOW 825
H-22 TRAVEL SPEED DOES NOT CHANGE OR TRAVEL SPEED IS LOW OR HIGH . 826
H-23 TRAVEL SYSTEM DOES NOT MOVE (ONLY ONE SIDE) . 827
H-24 UPPER STRUCTURE DOES NOT SWING 828
H-25 SWING ACCELERATION OR SWING SPEED IS LOW 830
H-26 UPPER STRUCTURE OVERRUNS REMARKABLY WHEN IT STOPS SWINGING 832
H-27 LARGE SHOCK IS MADE WHEN UPPER STRUCTURE STOPS SWINGING . 833
H-28 LARGE SOUND IS MADE WHEN UPPER STRUCTURE STOPS SWINGING . 833
H-29 HYDRAULIC DRIFT OF SWING IS LARGE . 834
H-30 ATTACHMENT CIRCUIT IS NOT CHANGED . 835
H-31 OIL FLOW IN ATTACHMENT CIRCUIT CANNOT BE CONTROLLED . 835
TROUBLESHOOTING OF ENGINE (S-MODE) . 837
METHOD OF USING TROUBLESHOOTING CHART 839
S-1 STARTING PERFORMANCE IS POOR . 842
S-2 ENGINE DOES NOT START 843
S-3 ENGINE DOES NOT PICK UP SMOOTHLY . 846
S-4 ENGINE STOPS DURING OPERATIONS . 847
S-5 ENGINE DOES NOT ROTATE SMOOTHLY 848
S-6 ENGINE LACKS OUTPUT (OR LACKS POWER) . 849
S-7 EXHAUST SMOKE IS BLACK (INCOMPLETE COMBUSTION) . 850
S-8 OIL CONSUMPTION IS EXCESSIVE (OR EXHAUST SMOKE IS BLUE) 851
S-9 OIL BECOMES CONTAMINATED QUICKLY . 852
S-10 FUEL CONSUMPTION IS EXCESSIVE . 853
S-11 OIL IS IN COOLANT (OR COOLANT SPURTS BACK OR COOLANT LEVEL GOES DOWN) . 854
S-12 OIL PRESSURE DROPS 855
S-13 OIL LEVEL RISES (ENTRY OF COOLANT OR FUEL) 856
S-14 COOLANT TEMPERATURE BECOMES TOO HIGH (OVERHEATING) 857
S-15 ABNORMAL NOISE IS MADE 858
S-16 VIBRATION IS EXCESSIVE 859
S-17 AIR CANNOT BE BLED FROM FUEL CIRCUIT 860
50 DISASSEMBLY AND ASSEMBLY 863
GENERAL INFORMATION ON DISASSEMBLY AND ASSEMBLY 863
How to read this manual 864
Coating materials list . 866
Special tools list . 869
Sketches of special tools 872
ENGINE AND COOLING SYSTEM 877
REMOVAL AND INSTALLATION OF FUEL SUPPLY PUMP ASSEMBLY 878
REMOVAL AND INSTALLATION OF FUEL INJECTOR ASSEMBLY . 882
REMOVAL AND INSTALLATION OF ENGINE FRONT SEAL 888
REMOVAL AND INSTALLATION OF ENGINE REAR SEAL . 889
REMOVAL AND INSTALLATION OF CYLINDER HEAD ASSEMBLY . 892
REMOVAL AND INSTALLATION OF RADIATOR ASSEMBLY 901
REMOVAL AND INSTALLATION OF HYDRAULIC OIL COOLER ASSEMBLY 903
REMOVAL AND INSTALLATION OF AFTERCOOLER ASSEMBLY . 905
REMOVAL AND INSTALLATION OF ENGINE AND HYDRAULIC OIL PUMP ASSEMBLY . 906
Power train 915
Removal and installation of final drive assembly . 916
Disassembly and assembly of final drive assembly . 917
Removal and installation of swing motor and swing machinery assembly . 926
Disassembly and assembly of swing motor and swing machinery assembly . 927
Removal and installation of swing circle assembly 934
Undercarriage and frame 937
Disassembly and assembly of carrier roller assembly 938
Disassembly and assembly of track roller assembly 940
Disassembly and assembly of idler assembly . 941
Disassembly and assembly of recoil spring assembly . 944
Removal and installation of sprocket . 946
Expansion and installation of track shoe assembly 947
Removal and installation of revolving frame assembly . 949
Removal and installation of counterweight assembly . 952
Hydraulic system . 957
Removal and installation of center swivel joint assembly . 958
Disassembly and assembly of center swivel joint assembly . 960
Removal and installation of hydraulic tank assembly 961
Removal and installation of control valve assembly . 963
Disassembly and assembly of control valve assembly . 966
Removal and installation of hydraulic pump assembly 968
Removal and installation of oil seal in hydraulic pump input shaft . 971
Disassembly and assembly of work equipment PPC valve assembly 972
Disassembly and assembly of travel PPC valve assembly 973
Disassembly and assembly of hydraulic cylinder assembly 974
WORK EQUIPMENT . 981
Removal and installation of work equipment assembly 982
Removal and installation of anti- drop valve assembly for boom . 985
Removal and installation of anti- drop valve assembly for arm 988
Disassembly and assembly of anti-drop valve assembly . 990
CAB AND ITS ATTACHMENTS 993
Removal and installation of operator cab assembly 994
Removal and installation of operator cab glass (stuck glass) . 997
Removal and installation of front window assembly 1007
Removal and installation of floor frame assembly .1014
Removal and installation of work equipment control lever assembly 1018
ELECTRICAL SYSTEM 1033
REMOVAL AND INSTALLATION OF AIR CONDITIONER UNIT ASSEMBLY 1034
REMOVAL AND INSTALLATION OF KOMTRAX COMMUNICATION MODEM ASSEMBLY .1037
REMOVAL AND INSTALLATION OF MONITOR ASSEMBLY .1038
REMOVAL AND INSTALLATION OF PUMP CONTROLLER ASSEMBLY .1040
REMOVAL AND INSTALLATION OF ENGINE CONTROLLER 1042
90 DIAGRAMS AND DRAWINGS .1045
HYDRAULIC DIAGRAMS AND DRAWINGS 1045
HYDRAULIC CIRCUIT DIAGRAM 1047
ELECTRICAL DIAGRAMS AND DRAWINGS .1051
Electrical circuit diagram .1053
Connector arrangement diagram .1063

DESCRIPTION:

Komatsu PC400-8R,PC400LC-8R,PC450-8R,PC450LC-8R Hydraulic Excavator Shop Manual SEN04239-18 – PDF DOWNLOAD

• SERIAL NUMBERS
  PC400- 75001            and up
  PC400LC- 75001       and up
  PC450- 75001          and up
  PC450LC- 75001      and up

G.B 26/12/24