Komatsu PC78US-11 Hydraulic Excavator Shop Manual SEN06844-08 PDF

Description

Komatsu PC78US-11 Hydraulic Excavator Shop Manual SEN06844-08 – PDF DOWNLOAD

FILE DETAILS:

Komatsu PC78US-11 Hydraulic Excavator Shop Manual SEN06844-08 – PDF DOWNLOAD 

Language : English
Pages : 2354
Downloadable : Yes
File Type : PDF

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DESCRIPTION:

Komatsu PC78US-11 Hydraulic Excavator Shop Manual SEN06844-08 – PDF DOWNLOAD

SERIAL NUMBERS 50001 and up

Foreword, Safety, Basic Information:
How to Read the Shop Manual:
• Some of the attachments and options described in this shop manual may not be available in some areas. If
they are required, consult your Komatsu distributor.
• The materials and specifications are subject to change without notice.
• Shop Manuals are available for “machine part” and “engine part”. For the engine unit, see the shop manual
for the machine which has the same engine model.
• Actual machine may differ from the images which are contained in this manual. A typical model is shown in
the illustrations of this shop manual.
• The caution lamps, pilot lamps, and symbols of the switches on the machine monitor can be different in
accordance with the machine.
• For details of the symbols shown on the machine monitor, see Structure and Operation, “Caution
Lamps Shown on Machine Monitor” and “Pilot Lamps Shown on Machine Monitor”.
• For details of the switches of the machine monitor, see Testing and Adjusting, “Set and Operate Machine
Monitor”.
• For details of the switches, see the “Operation and Maintenance Manual”.
• All “AdBlue/DEF” shown on the machine monitor is referred to as “DEF” in the shop manual. Some machine
monitors installed to the product show “DEF” as “AdBlue/DEF” in the service mode. Thus, be sure to recognize
that “DEF” and “AdBlue/DEF” are the same when you read the shop manual.

Composition of the Shop Manual
This shop manual contains technical information necessary to perform services in workshops. It is divided into
the following chapters for the ease of use.
00 Index and Foreword
This section describes the index, foreword, safety, and basic information.
01 Specification
This section describes the specifications of the machine.
10 Structure and Function
This section describes the structure and operation of each component with respect to each system. “Structure
and Function” is helpful in not only understanding the structure of each component but performing troubleshooting.
20 Standard Value Table
This section describes the standard values for new machine and failure criteria for testing and adjusting, and
troubleshooting. Use the standard values table to check the standard values for testing and adjusting, and judge
troubles in troubleshooting.
30 Testing and Adjusting
This section describes the measuring tools and measuring methods for testing and adjusting as well as the adjusting
method of each part. The standard values and repair limit for TESTING AND ADJUSTING are described
in “Standard Value Table”.
40 Troubleshooting
This section describes troubleshooting of failure part and its remedy method on the occurrence of the failure.
Descriptions of troubleshooting are sorted by failure mode.

TABLE OF CONTENTS:

Komatsu PC78US-11 Hydraulic Excavator Shop Manual SEN06844-08 – PDF DOWNLOAD 

SERIAL NUMBERS 50001 and up

Cover 1
00 Index and Foreword 3
Index 4
Foreword, Safety, Basic Information 17
How to Read the Shop Manual 17
Safety Notice for Operation 19
Precautions to Prevent Fire 27
Procedures If Fire Occurs 29
Precautions When You Discard Waste Materials 30
Precautions When You Handle Hydraulic Equipment 31
Precautions When You Disconnect and Connect Pipings 34
Precautions When You Handle Electrical Equipment 41
Precautions When You Handle Fuel System Equipment 43
Precautions When You Handle Intake System Equipment 44
Practical Use of KOMTRAX 45
Disconnect and Connect Push-Pull Type Coupler 46
How to Disconnect and Connect Type 1 Push-Pull Type Coupler 46
How to Disconnect and Connect Type 2 Push-Pull Type Coupler 47
How to Disconnect and Connect Type 3 Push-Pull Type Coupler 48
Precautions for Disconnection and Connection of Connectors 50
Disconnect and Connect Deutsch Connector 54
How to Disconnect and Connect Slide Lock Type Connector 55
Disconnect and Connect Connector with Lock to Pull 57
Disconnect and Connect Connector with Lock to Push 58
Disconnect and Connect Connector with Housing to Rotate 60
How to Read the Codes for Electric Cable 61
Explanation of Terms for Maintenance Standard 65
Standard Tightening Torque Table 68
Conversion Table 75
Abbreviation List 80
01 Specification 87
Table of Contents 88
Specifications 89
Specification Drawing 89
Specification Drawing: PC78US-11 89
Working Range Drawings 92
Working Range Drawings: PC78US-11 92
Specifications 93
Specification: PC78US-11 93
Weight Table 97
Weight Table: PC78US-11 97
Fuel, Coolant, Lubricants (For North America) 99
How to Use Fuel, Coolant and Lubricants by Ambient Temperature 99
10 Structure and Function 101
Table of Contents 102
Boot-up System 105
Layout Drawing of Boot-up System 105
System Operating Lamp System 106
System Diagram of System Operating Lamp System (Machine with Gateway Function Controller) 106
Function of System Operating Lamp System (Machine with Gateway Function Controller) 106
Battery Disconnect Switch 108
Function of Battery Disconnect Switch 108
Engine System 109
Layout Drawing of Engine System 109
Engine Control System 111
System Diagram of Engine Control 111
Function of Engine Control System 112
Auto-Deceleration System 114
System Diagram of Auto-Deceleration System 114
Function of Auto-Deceleration System 114
Operation of Auto-Deceleration System 115
Engine Automatic Warm-up System 116
System Diagram of Engine Automatic Warm-up System 116
Function of Engine Automatic Warm-up System 117
Overheat Prevention System 118
Function of Overheat Prevention System 118
Turbocharger Protection System 119
Function of Turbocharger Protection System 119
Automatic Idle Stop System 120
System Diagram of Automatic Idle Stop System (Machine with Gateway Function Controller) 120
Function of Automatic Idle Stop System 120
Component Parts of Engine System 123
PTO 123
Turbocharger 124
EGR System 126
EGR Valve 129
EGR Cooler 131
High Efficiency Breather System 132
High Efficiency Breather 133
KDOC 135
Cooling System 137
Layout Drawing of Cooling System 137
Specifications of Cooling System 138
Control System 139
Layout Drawing of Control System 139
Machine Monitor System 141
System Diagram of Machine Monitor System (Machine with Gateway Function Controller) 141
Function of Machine Monitor System 141
KOMTRAX System 143
System Diagram of KOMTRAX System 143
Function of KOMTRAX System 143
Component Parts of Control System 144
Machine Monitor 144
Gateway Function Controller 156
Communication Terminal 159
Pump Controller 161
Resistor for PC-EPC Valve 165
CAN Terminating Resistor 166
Engine Controller 167
Fuel Control Dial 174
Hydraulic System 175
Layout Drawing of Hydraulic System 175
CLSS 178
Structure of CLSS 178
Function of CLSS 179
Engine and Pump Combined Control System 181
Engine and Pump Combined Control System Diagram 181
Function of Engine and Pump Combined Control System 182
Component Parts of Hydraulic System 185
Hydraulic Tank 186
Main Pump 188
Control Valve 206
Work Equipment System 267
Layout Drawing of Work Equipment System 267
PPC Lock System 269
System Diagram of PPC Lock 269
Function of PPC Lock System 269
Work Equipment and Travel Automatic Lock System 270
System Diagram of Lock Lever Automatic Lock System 270
Function of Work Equipment and Travel Automatic Lock System 270
Operation of Lock Lever Automatic Lock System 271
Attachment Oil Flow Adjuster System 272
Attachment Oil Flow Adjuster System Diagram 272
Function of Attachment Oil Flow Adjuster System 272
Component Parts of Work Equipment System 274
Work Equipment and Swing PPC Valve 274
1st-Line Attachment PPC Valve (with EPC Valve) 278
Attachment Oil Flow Adjuster EPC Valve 284
Blade PPC Valve 284
Solenoid Valve 286
Boom Anti-drop Valve 289
Arm Anti-Drop Valve 294
Multi-Control Valve 298
Pilot Circuit Accumulator 300
Attachment Circuit Accumulator (For Low Pressure Circuit) 301
Swing System 302
Layout Drawing of Swing System 302
Swing Control System Diagram 304
Function of Swing Control System 304
Component Parts of Swing System 306
Swing Motor 306
Swing Machinery 315
Swing Circle 317
Travel System 319
Layout Drawing of Travel System 319
System Diagram of Travel Control System 321
Function of Travel Control System 321
Component Parts of Travel System 323
Travel Motor 323
Travel PPC Valve 331
Center Swivel Joint 336
Undercarriage and Frame 337
Layout Drawing of Undercarriage 337
Specifications of Undercarriage 337
Idler Cushion 339
Structure of Idler Cushion 339
Specifications of Idler Cushion 339
Work Equipment 340
Structure of Work Equipment 340
Function of Work Equipment 341
Work Equipment Clearance Adjustment Shim 342
Function of Work Equipment Clearance Adjustment Shim 342
Bucket Clearance Adjustment Shim 343
Function of Bucket Clearance Adjustment Shim 343
CAB Related Parts 344
ROPS CAB 344
Structure of ROPS CAB 344
Function of ROPS CAB 344
CAB Mount 345
Structure of CAB Mount 345
Function of CAB Mount 346
Remove Wiring Harness Out of Cab 347
20 Standard Value Table 349
Table of Contents 350
Standard Value Table for Engine 351
Standard Value Table for Engine: PC78US-11 351
Standard Value Table for Machine 353
Standard Value Table for Machine: PC78US-11 353
Machine Posture and Procedures to Measure Performance 367
30 Testing and Adjusting 371
Table of Contents 372
Precautions Before Work 375
Related Information on Testing and Adjusting 376
Tools for Testing and Adjusting 376
Sketch of Tools for Testing and Adjusting 381
Engine and Cooling System 383
Examine Engine Speed 383
How to Examine Engine Speed 383
Examine Exhaust Gas Color 387
How to Examine Exhaust Gas Color with the Handy Smoke Checker 387
How to Examine Exhaust Gas Color with Smoke Meter 388
Examine and Adjust Valve Clearance 390
How to Examine Valve Clearance 390
How to Adjust Valve Clearance 391
Examine Compression Pressure 392
How to Examine Compression Pressure 392
Examine Blowby Pressure 395
How to Examine Blowby Pressure 395
Examine Engine Oil Pressure 397
How to Examine Engine Oil Pressure 397
Visual Check Inside of EGR Valve 399
How to do the Visual Check Inside of EGR Valve 399
Clean Inside of EGR Valve 401
How to Clean Inside of EGR Valve 401
Examine Fuel Pressure 404
How to Examine Fuel Pressure 404
Examine Fuel Return Rate and Leakage 406
How to Examine Fuel Return Rate and Leakage 408
Bleed Air from Fuel System 411
How to Bleed Air from Fuel System 411
Examine Fuel Circuit for Leakage 413
How to Examine Fuel System for Leakage 413
Handle Cylinder Cut-out Mode Operation 415
Handle No-Injection Cranking Operation 416
Examine Fan Belt 417
How to Examine Fan Belt 417
Examine Automatic Tensioner 418
How to Examine Automatic Tensioner 418
Write Injector Compensation Value to Engine Controller 420
Write Injector Compensation Value 420
Power Train 426
Examine Swing Circle Bearing Clearance 426
How to Examine Swing Circle Bearing Clearance 426
Undercarriage and Frame 428
Examine and Adjust Track Tension 428
How to Examine Track Tension 428
How to Adjust Track Tension 428
Hydraulic System 430
Release Remained Pressure in Hydraulic Circuit 430
How to Release Remained Pressure from Hydraulic Tank 430
How to Release Remained Pressure in Hydraulic Cylinder Circuit 430
How to Release Remained Pressure from Swing Motor Circuit 433
How to Release Remained Pressure from Travel Motor Circuit 433
Examine and Adjust Oil Pressure in Work Equipment and Travel Circuits 435
Examine Oil Pressure in Work Equipment and Travel Circuits 435
Adjust Oil Pressure in Work Equipment and Travel Circuits 443
Adjust Work Equipment and Travel Relief Pressure 444
Examine and Adjust Swing and Blade Circuit Oil Pressure 445
How to Examine Swing and Blade Relief Pressure 445
Adjust Swing Relief Pressure 447
Adjust Blade LOWER Relief Pressure 447
Adjust Blade RAISE Relief Pressure 448
Examine Oil Pressure of Control Circuit 449
How to Examine Oil Pressure in Control Circuit 449
Examine and adjust oil pressure in pump PC control circuit 451
How to Examine PC Valve Outlet Pressure (Servo Piston Inlet Pressure) 451
Examine Source Pressure of PC-EPC Valve 453
Examine PC-EPC Valve Output Pressure 454
How to Adjust Oil Pressure in Pump PC Control Circuit 455
Examine and Adjust Oil Pressure in Pump LS Control Circuit 457
Examine LS Differential Pressure with Machine Monitor 457
How to Examine LS Differential Pressure by Testing Tool 459
Adjust LS Valve 461
Examine Outlet Pressure of Solenoid Valve 463
How to Examine Outlet Pressure of Solenoid Valve 463
Operating Condition of Solenoid Valve 465
Examine PPC Valve Outlet Pressure 466
How to Examine PPC Valve Outlet Pressure 466
Examine and Adjust Travel Deviation 468
How to Examine Travel Deviation 468
How to Adjust Travel Deviation 469
Examine Parts Which Cause Hydraulic Drift of Work Equipment 471
How to Examine Parts Which Cause Hydraulic Drift of Boom Cylinder and Bucket Cylinder 471
How to Examine the Parts Which Cause Hydraulic Drift of Arm Cylinder 471
How to Examine Parts that Cause Hydraulic Drift of PPC Valve 472
Examine Oil Leakage 473
How to Examine Oil Leakage from Boom Cylinder 473
How to Examine Oil Leakage from Arm Cylinder 474
How to Examine Oil Leakage from Bucket Cylinder 474
How to Examine Oil Leakage from Blade Cylinder 475
How to Examine Oil Leakage from Swing Motor 476
How to Examine Oil Leakage from Travel Motor 477
Bleed Air from Hydraulic System 479
How to Bleed Air from Hydraulic System 480
CAB Related Parts 486
How to Adjust Mirrors 486
Adjust Left Front Mirror 487
Procedure to Adjust Specified Position of Left Front Mirror 488
Adjust Rear Mirror 489
How to Examine and Adjust Slide Door 490
How to Examine and Adjust Slide Door When It is Closed and Locked 490
How to Examine and Adjust Slide Door When It is Open and Locked 502
Electrical System 515
Set and Operate Machine Monitor 515
Operator Mode 518
Function to Show Technician Identification Status Screen 518
Function to Show Operator Identification Input Screen 518
Examine Function by LCD (Liquid Crystal Display) 519
Examine Function of Service Meter 519
Usage Limitation and Maintenance Password Change Function 520
Service Mode 523
How to Operate Service Mode 523
How to See Pre-defined Monitoring Information 525
How to Examine Monitoring Information 529
Abnormality Record Menu 538
How to See Maintenance Record 543
Maintenance Mode Setting 544
How to Set Phone Number Entry 548
Default Setting Menu 550
Testing Menu 560
Adjustment Menu 563
No-Injection Cranking Operation 582
KOMTRAX Settings Menu 585
How to Show Service Message 587
Start Up KOMTRAX System 589
Adjust Rearview Camera Angle 596
How to Adjust Rearview Camera Angle 596
Adjust Rightview Camera Angle 599
Adjust Right View Camera Angle 599
Set Region of Bluetooth(R) Compatible Radio 602
Set Region of Bluetooth(R) Compatible Radio 602
Handle Voltage Circuit of Engine Controller 604
Handle Battery Disconnect Switch 605
Examine Diodes 606
Examine Diodes by Digital Tester 606
How to Examine Diodes by Analog Tester 606
Pm Clinic 607
Pm Clinic Service 607
Pm Clinic Check Sheet: PC78US-11 609
40 Troubleshooting 621
Table of Contents 622
Precautions Before Work 629
Related Information to Troubleshooting 630
General Troubleshooting Points 630
Sequence of Events in Troubleshooting 631
Checks Before Troubleshooting 633
Inspection Procedure Before Troubleshooting 635
Walk-Around Check 635
Test in Accordance with Testing Procedure 637
Examine Fuel Level and Type 637
Examine Fuel Prefilter 638
Examine Water Separator, Drain Water and Sediment 638
How to Replace Fuel Prefilter Cartridge 639
Examine Fuel Main Filter 641
Examine Engine Oil Level (Oil Quantity in Oil Pan) 642
Examine Oil Level in PTO Gear Case 643
Examine Coolant Level (Expansion Tank) 645
Examine Air Cleaner Clogging 646
Clean Outer Element 646
Replace Element 648
Examine Hydraulic Oil Level 649
Examine Hydraulic Oil Strainer 651
Examine Hydraulic Oil Filter 653
Examine Oil Level in Swing Machinery Case 654
Examine Oil Level in Final Drive Case 655
Bleed Air from Fuel System 656
Bleed Air from Hydraulic System 656
How to Examine Electric Equipment 656
Preparation for Troubleshooting of Electrical System 661
Preparation for Troubleshooting of Machine Monitor 661
Preparation for Troubleshooting of Engine Controller 663
Preparation for Troubleshooting of Pump Controller 664
Preparation for Troubleshooting of Gateway Function Controller 664
How to Disconnect and Connect Connector with a Special Lock 665
Procedure for Troubleshooting 669
Symptom and Troubleshooting Numbers 672
Information Shown in Troubleshooting Table 677
Diagnose Open Circuit of Hydraulic Pressure Sensor System Wiring Harness 679
Connectors List 682
Connector Layout 688
Connector Contact Connection Table 694
T-Branch Box and T-Branch Adapter Table 741
Fuse Location Table 747
Failure Code Table 749
Troubleshooting by Failure Code (Display of Code) 759
Failure Code [6AZ0ZG] 759
Failure Code [879AKA] 761
Failure Code [879AKB] 762
Failure Code [879BKA] 763
Failure Code [879BKB] 765
Failure Code [879CKA] 767
Failure Code [879CKB] 768
Failure Code [879DKZ] 769
Failure Code [879EMC] 771
Failure Code [879FMC] 772
Failure Code [879GKX] 773
Failure Code [989L00] 775
Failure Code [989M00] 776
Failure Code [989N00] 777
Failure Code [A900FR] 778
Failure Code [A900N6] 779
Failure Code [A900NY] 780
Failure Code [AA10NX] 781
Failure Code [AB00KE] 783
Failure Code [B@BAZG] 785
Failure Code [B@BCNS] 786
Failure Code [B@BCQA] 787
Failure Code [B@BCZK] 789
Failure Code [B@HANS] 791
Failure Code [CA115] 793
Failure Code [CA122] 794
Failure Code [CA123] 796
Failure Code [CA131] 798
Failure Code [CA132] 800
Failure Code [CA144] 802
Failure Code [CA145] 804
Failure Code [CA153] 806
Failure Code [CA154] 809
Failure Code [CA187] 812
Failure Code [CA221] 814
Failure Code [CA222] 816
Failure Code [CA227] 818
Failure Code [CA234] 819
Failure Code [CA238] 820
Failure Code [CA239] 822
Failure Code [CA271] 824
Failure Code [CA272] 826
Failure Code [CA322] 828
Failure Code [CA324] 831
Failure Code [CA331] 834
Failure Code [CA343] 837
Failure Code [CA351] 838
Failure Code [CA352] 839
Failure Code [CA356] 841
Failure Code [CA357] 843
Failure Code [CA386] 846
Failure Code [CA435] 847
Failure Code [CA441] 849
Failure Code [CA442] 851
Failure Code [CA449] 852
Failure Code [CA451] 853
Failure Code [CA452] 855
Failure Code [CA515] 857
Failure Code [CA516] 859
Failure Code [CA553] 861
Failure Code [CA559] 862
Failure Code [CA689] 866
Failure Code [CA691] 868
Failure Code [CA692] 870
Failure Code [CA697] 872
Failure Code [CA698] 873
Failure Code [CA731] 874
Failure Code [CA778] 875
Failure Code [CA1117] 878
Failure Code [CA1896] 879
Failure Code [CA1961] 883
Failure Code [CA2185] 884
Failure Code [CA2186] 886
Failure Code [CA2249] 888
Failure Code [CA2272] 889
Failure Code [CA2311] 892
Failure Code [CA2349] 893
Failure Code [CA2353] 895
Failure Code [CA2357] 897
Failure Code [CA2765] 898
Failure Code [CA2973] 899
Failure Code [CA3419] 900
Failure Code [CA3421] 902
Failure Code [CA3724] 904
Failure Code [CA4264] 905
Failure Code [CA4952] 907
Failure Code [D110KB] 909
Failure Code [D19JKZ] 911
Failure Code [D811MC] 913
Failure Code [D862KA] 914
Failure Code [D8ALKA] 915
Failure Code [D8ALKB] 917
Failure Code [D8AQKR] 919
Failure Code [D8G1KT] 924
Failure Code [D8G6KT] 925
Failure Code [DA20MC] 926
Failure Code [DA22KK] 927
Failure Code [DA25KP] 930
Failure Code [DA26KP] 933
Failure Code [DA29KQ] 935
Failure Code [DA2LKA] 937
Failure Code [DA2LKB] 939
Failure Code [DA2QKR] 941
Failure Code [DA2RKR] 947
Failure Code [DAF0MB] 952
Failure Code [DAF0MC] 953
Failure Code [DAF8KB] 954
Failure Code [DAF9KQ] 956
Failure Code [DAFGMC] 957
Failure Code [DAFLKA] 958
Failure Code [DAFLKB] 960
Failure Code [DAFQKR] 962
Failure Code [DAZ9KQ] 968
Failure Code [DAZQKR] 969
Failure Code [DB2QKR] 973
Failure Code [DB2RKR] 979
Failure Code [DDNRKA] 984
Failure Code [DDNRKY] 987
Failure Code [DDNS00] 989
Failure Code [DFB1KZ] 991
Failure Code [DFB2KZ] 993
Failure Code [DFB3L8] 995
Failure Code [DFB4L8] 997
Failure Code [DFB5KZ] 999
Failure Code [DFB6KZ] 1001
Failure Code [DGH2KA] 1003
Failure Code [DGH2KB] 1005
Failure Code [DHA4KA] 1006
Failure Code [DHPAMA] 1008
Failure Code [DHS3MA] 1010
Failure Code [DHS4MA] 1012
Failure Code [DHS5MA] 1014
Failure Code [DHS8MA] 1016
Failure Code [DHS9MA] 1018
Failure Code [DHSAMA] 1020
Failure Code [DHSBMA] 1022
Failure Code [DHSCMA] 1024
Failure Code [DHSDMA] 1026
Failure Code [DKR0MA] 1028
Failure Code [DKULKA] 1030
Failure Code [DKULKB] 1032
Failure Code [DKULKY] 1034
Failure Code [DLM5KA] 1036
Failure Code [DLM5MB] 1038
Failure Code [DV20KB] 1040
Failure Code [DW43KA] 1042
Failure Code [DW43KB] 1044
Failure Code [DW43KY] 1046
Failure Code [DW45KA] 1047
Failure Code [DW45KB] 1050
Failure Code [DW45KY] 1053
Failure Code [DW4CKY] 1055
Failure Code [DWA2KA] 1057
Failure Code [DWA2KB] 1059
Failure Code [DWA2KY] 1061
Failure Code [DWJ0KA] 1062
Failure Code [DWJ0KB] 1064
Failure Code [DWJ0KY] 1066
Failure Code [DWN5KA] 1067
Failure Code [DWN5KB] 1069
Failure Code [DWN5KY] 1071
Failure Code [DXA8KA] 1073
Failure Code [DXA8KB] 1075
Failure Code [DXE4KA] 1077
Failure Code [DXE4KB] 1079
Failure Code [DXE4KY] 1081
Failure Code [DXE7KA] 1082
Failure Code [DXE7KB] 1084
Failure Code [DXE7KY] 1086
Failure Code [DXE8KA] 1088
Failure Code [DXE8KB] 1090
Failure Code [DXE8KY] 1092
Failure Code [DXE9KA] 1094
Failure Code [DXE9KB] 1096
Failure Code [DXE9KY] 1098
Failure Code [DXEAKA] 1100
Failure Code [DXEAKB] 1102
Failure Code [DXEAKY] 1104
Failure Code [DY20KA] 1106
Failure Code [DY20MA] 1108
Failure Code [DY2CKB] 1110
Failure Code [DY2DKB] 1112
Failure Code [DY2EKB] 1114
Failure code [F311KA] 1116
Failure code [F311KB] 1118
Failure code [F312KA] 1120
Failure code [F312KB] 1122
Failure Code [F313KA] 1124
Failure Code [F313KB] 1125
Failure code [F314KA] 1126
Failure code [F314KB] 1128
Failure Code [F315KB] 1130
Failure Code [F315KY] 1132
Failure code [F316KB] 1134
Failure code [F316KY] 1136
Failure Code [F318KB] 1138
Failure Code [F318KY] 1139
Failure code [F31AKB] 1140
Failure code [F31AKY] 1142
Failure Code [F31BKB] 1144
Failure Code [F31BKY] 1146
Failure Code [F31CKB] 1148
Failure Code [F31CKY] 1150
Failure Code [F31DKB] 1152
Failure Code [F31DKY] 1154
Failure Code [F31EKB] 1156
Failure Code [F31EKY] 1158
Failure Code [FS10ZE] 1160
Troubleshooting of Electrical System (E-Mode) 1161
Engine Does Not Start (Engine Does Not Crank) 1161
Manual Preheating System Does Not Operate 1167
While Preheating is in Operation, Preheating Monitor Does Not Come On 1170
When Starting Switch is Turned to ON Position, Machine Monitor Shows Nothing 1172
Engine Coolant Temperature Monitor Comes On in White While Engine is in Operation 1175
Hydraulic Oil Temperature Monitor Comes On in White While Engine is in Operation 1176
Charge Level Monitor Comes On in Red While Engine is in Operation 1177
Fuel Level Monitor Comes On in Red While Engine is in Operation 1178
Engine Coolant Temperature Monitor Comes On in Red While Engine is in Operation 1179
Engine Oil Pressure Monitor Comes On in Red While Engine is in Operation 1180
Hydraulic Oil Temperature Monitor Comes On in Red While Engine is in Operation 1181
Fuel Gauge Does Not Move from Minimum or Maximum 1182
Display of Fuel Gauge is Different from Actual Fuel Level 1184
Coolant Temperature Gauge Display Does Not Move from Minimum or Maximum 1185
Display of Coolant Temperature Gauge is Different from Actual Coolant Temperature 1186
Hydraulic Oil Temperature Gauge Does Not Move from Minimum or Maximum 1187
Display of Hydraulic Oil Temperature Gauge is Different from Actual Oil Temperature 1189
Some Areas of Machine Monitor Screen are Not Shown 1190
Function Switch Does Not Operate 1191
Automatic Warm-up System Does Not Operate (in Cold Weather) 1192
Auto-Deceleration Monitor Does Not Come On or Go Out While Auto-Deceleration Switch is Operated 1193
Auto-Decelerator is Not Operated or Canceled with Lever 1194
Work Mode Selector Screen is Not Shown While Work Mode Switch is Operated 1195
When Working Mode is Changed, Setting of Engine and Hydraulic Pump is Not Changed 1196
Travel Speed Monitor Does Not Change While Travel Speed Switch is Operated 1197
Travel Speed Does Not Change Even When You Change Travel Speed 1198
Alarm Buzzer Does Not Stop 1199
Service Meter is Not Shown While Starting Switch is in OFF Position 1200
Service Mode Cannot be Selected 1201
All Work Equipment, Swing, Travel Do Not Operate 1202
All Work Equipment, Swing, Travel Cannot be Locked 1205
Machine Does Not Swing While Swing Parking Brake Release Switch is Set to Release Position 1207
While Swing Parking Brake Release Switch is Turned on, Swing Brake is Not Operated 1209
Work Equipment Does Not Operate While Lock Lever Automatic Release Switch is in Release Position 1211
Travel Alarm Does Not Operate During Travel 1213
Travel Alarm Does Not Stop When Machine Stops 1215
Horn Does Not Sound 1216
Horn Does Not Make Sound (Machine With Proportional Control Lever) 1218
Horn Does Not Stop 1220
Horn Does Not Stop Sounding (Machine With Proportional Control Lever) 1221
Wiper Monitor Does Not Come On or Go Out While Wiper Switch is Operated 1222
Windshield Wiper Does Not Operate When Wiper Switch is Operated 1223
When Window Washer Switch is Operated, Window Washer Does Not Operate 1225
“Boom Raise” is Not Shown Correctly with Monitoring Function 1226
“Boom Lower” is Not Shown Correctly with Monitoring Function 1227
“Arm OUT” is Not Shown Correctly with Monitoring Function 1228
“Arm IN” is Not Shown Correctly with Monitoring Function 1229
Bucket DUMP is Not Shown Correctly with Monitoring Function 1230
Bucket CURL is Not Shown Correctly with Monitoring Function 1231
Swing is Not Shown Correctly with Monitoring Function 1232
Travel is Not Shown Correctly with Monitoring Function 1233
Service is Not Shown Correctly with Monitoring Function 1234
Blade RAISE is Not Shown Correctly with Monitoring Function 1237
Blade LOWER is Not Shown Correctly with Monitoring Function 1239
KOMTRAX System Does Not Operate Correctly 1241
Troubleshooting for Hydraulic and Mechanical Systems (H Mode) 1242
Information Shown in Troubleshooting Table (H-Mode) 1242
Failure Mode and Cause Table 1243
All Work Equipment, Swing and Travel Do Not Work 1255
All Work Equipment, Swing, and Travel Lack Speed or Power 1256
Fine Control Performance or Response is Unsatisfactory 1258
Unusual Noise is Heard from Around Hydraulic Pump 1259
Engine Speed Drops Largely or Engine Stops 1260
Boom Speed or Power is Low 1262
Arm Speed or Power is Low 1266
Bucket Speed or Power is Low 1269
Blade Speed or Power is Low 1272
Work Equipment Does Not Move in Single Operation 1274
Hydraulic Drift of Boom is Large 1276
Hydraulic Drift of Arm is Large 1277
Hydraulic Drift of Bucket is Large 1278
Hydraulic Drift of Blade is Large 1279
When Single Work Equipment is Released Hydraulically, Other Work Equipment Moves 1281
Time Lag of Work Equipment is Large 1282
Attachment Circuit Cannot be Changed 1283
Oil Flow in Attachment Circuit Cannot be Changed 1284
Oil Flow in Attachment Circuit Cannot be Changed (Machine with Proportional Control Lever) 1285
In Mixed Operation of Work Equipment, Work Equipment with Heavier Load Moves Slower 1286
In Mixed Operation of Work Equipment or Swing and Travel, Travel Speed Falls Largely 1287
In Mixed Operation of Swing and Boom RAISE, Boom RAISE Speed is Low 1289
Machine Does Not Travel Straight 1290
Machine is Not Steered Well or Steering Power is Low 1293
Travel Speed is Low 1296
One of Tracks Does Not Run 1299
Travel Speed Does Not Change, or Travel Speed is Too Slow or Fast 1301
Upper Structure Does Not Swing in Two Directions of Right and Left 1302
Machine Swings Only in One Direction 1304
Swing Acceleration or Swing Speed is Low in Two Directions of Right and Left 1306
Swing Acceleration or Swing Speed is Low in Only One Direction 1308
Upper Structure Overruns Too Much When It Stops Swing Operation (Right and Left) 1310
Upper Structure Overruns Too Much When It Stops Swing Operation (Only One Direction) 1311
Shock is Large When Upper Structure Stops Swing Operation 1312
Large Unusual Noise is Made When Upper Structure Stops Swing Operation 1313
Swing Drift on a Slope is Large (While Swing Parking Brake is Applied) 1314
Swing Drift on a Slope is Large (While Swing Parking Brake is Released) 1315
Fan Speed is Abnormal (Too High or Low, or Does Not Rotate) 1316
Unusual Noise is Heard from Around Fan 1317
Troubleshooting of Engine (S-Mode) 1318
Information Shown in Troubleshooting Table (S-Mode) 1318
Engine Does Not Crank When Starting Switch is Turned to Start Position 1319
Engine Cranks but No Exhaust Smoke Comes Out 1320
Fuel is Sprayed but Engine Does Not Start (Misfiring: Engine Cranks but Does Not Start) 1321
Engine Startability is Unsatisfactory 1322
Engine Does Not Pick Up Smoothly 1324
Engine Stops During Operation 1326
Engine Does Not Rotate Smoothly 1328
Engine Lacks Output (or Lacks Power) 1329
Exhaust Smoke is Black 1331
Engine Oil Consumption is Excessive 1333
Engine Oil Becomes Dirty Quickly 1334
Fuel Consumption is Excessive 1335
Oil is in Coolant (or Coolant Spurts Back or Coolant Level Goes Down) 1336
Engine Oil Pressure Drops 1337
Fuel Mixes Into Engine Oil 1338
Water Mixes Into Engine Oil (Milky) 1339
Coolant Temperature Increases Too High (Overheat) 1340
Unusual Noise is Heard 1341
Vibration is Excessive 1342
Air Cannot be Bled from Fuel Circuit 1343
50 Disassembly and Assembly 1345
Table of Contents 1346
Precautions Before Work 1350
Related Information on Disassembly and Assembly 1351
How to Read This Manual 1351
Coating Materials List 1352
Special Tool List 1357
Sketches of Special Tools 1373
Prepare 1376
Drain and Add Coolant 1376
How to Drain Coolant 1377
How to Add Coolant 1378
Drain and Add Hydraulic Oil 1379
How to Drain Hydraulic Oil 1380
How to Add Hydraulic Oil 1381
Drain and Add Fuel 1383
How to Drain Fuel 1384
How to Add Fuel 1384
Collect and Refill Refrigerant 1386
How to Collect Refrigerant 1386
How to Refill Refrigerant 1387
Engine and Cooling System 1388
Remove and Install Supply Pump Assembly 1388
How to Remove Supply Pump Assembly 1389
How to Install Supply Pump Assembly 1399
Remove and Install Injector Assembly 1408
How to Remove Injector Assembly 1409
How to Install Injector Assembly 1413
Remove and Install Cylinder Head Assembly 1420
How to Remove Cylinder Head Assembly 1422
How to Install Cylinder Head Assembly 1450
Remove and Install EGR Valve Assembly 1490
How to Remove EGR Valve Assembly 1491
How to Install EGR Valve Assembly 1492
Remove and Install EGR Cooler Assembly 1495
How to Remove EGR Cooler Assembly 1496
Install EGR Cooler Assembly 1502
Remove and Install Starter Assembly 1508
How to Remove Starting Motor Assembly 1509
How to Install Starting Motor Assembly 1511
Remove and Install Fan Belt 1515
Remove Fan Belt 1516
Install Fan Belt 1518
Remove and Install Automatic Tensioner 1520
How to Remove Auto-Tensioner 1520
How to Install Auto-Tensioner 1521
Remove and Install Expansion Tank Assembly 1522
Remove Expansion Tank Assembly 1523
Install Expansion Tank Assembly 1527
Remove and Install Radiator Assembly 1532
How to Remove Radiator Assembly 1533
How to Install Radiator Assembly 1536
Remove and Install Hydraulic Oil Cooler Assembly 1539
How to Remove Hydraulic Oil Cooler Assembly 1540
How to Install Hydraulic Oil Cooler Assembly 1549
Remove and Install Aftercooler Assembly 1558
How to Remove Aftercooler Assembly 1559
How to Install Aftercooler Assembly 1561
Remove and Install Engine and Main Pump Assembly 1564
How to Remove Engine and Main Pump Assembly 1566
How to Install Engine and Main Pump Assembly 1588
Remove and Install Engine Front Oil Seal 1613
How to Remove Engine Front Oil Seal 1614
How to Install Engine Front Oil Seal 1615
Remove and Install Engine Rear Oil Seal 1617
How to Remove Engine Rear Oil Seal 1618
How to Install Engine Rear Oil Seal 1620
Remove and Install Fuel Cooler Assembly 1624
Remove Fuel Cooler Assembly 1625
Install Fuel Cooler Assembly 1625
Remove and Install Engine Hood Assembly 1627
How to Remove Engine Hood Assembly 1627
How to Install Engine Hood Assembly 1630
Remove and Install KDOC Assembly 1633
How to Remove KDOC Assembly 1634
How to Install KDOC Assembly 1638
Remove and Install Fuel Tank Assembly 1644
How to Remove Fuel Tank Assembly 1645
How to Install Fuel Tank Assembly 1649
Remove and Install Air Cleaner Assembly 1654
How to Remove Air Cleaner Assembly 1655
How to Install Air Cleaner Assembly 1656
Remove and Install Air Conditioner Compressor Assembly 1659
How to Remove Air Conditioner Compressor Assembly 1660
How to Install Air Conditioner Compressor Assembly 1662
Remove and Install Air Conditioner Condenser Assembly 1664
How to Remove Air Conditioner Condenser Assembly 1665
How to Install Air Conditioner Condenser Assembly 1667
Power Train 1669
Remove and Install Travel Motor and Final Drive Assembly 1669
How to Remove Travel Motor and Final Drive Assembly 1670
How to Install Travel Motor and Final Drive Assembly 1673
Disassemble and Assemble Travel Motor and Final Drive Assembly 1677
Disassemble Travel Motor and Final Drive Assembly 1686
Assemble Travel Motor and Final Drive Assembly 1706
Remove and Install Swing Motor and Swing Machinery Assembly 1725
How to Remove Swing Motor and Swing Machinery Assembly 1726
How to Install Swing Motor and Swing Machinery Assembly 1731
Disassemble and Assemble Swing Machinery Assembly 1736
How to Disassemble Swing Machinery Assembly 1737
How to Assemble Swing Machinery Assembly 1740
Remove and Install Swing Circle Assembly 1746
How to Remove Swing Circle Assembly 1746
How to Install Swing Circle Assembly 1747
Undercarriage and Frame 1748
Separate and Connect Track Assembly 1748
Separate Track Assembly 1749
How to Install Track Assembly 1749
Remove and Install Sprocket 1751
Remove Sprocket 1751
Install Sprocket 1752
Remove and Install Idler and Idler Cushion Assembly 1753
Remove Idler and Idler Cushion Assembly 1753
Install Idler and Idler Cushion Assembly 1754
Disassemble and Assemble Idler Assembly 1755
How to Disassemble Idler Assembly 1755
How to Assemble Idler Assembly 1756
Disassemble and Assemble Idler Cushion Assembly 1759
Disassemble Idler Cushion Assembly 1759
Assemble Idler Cushion Assembly 1760
Disassemble and Assemble Track Roller Assembly 1762
How to Disassemble Track Roller Assembly 1762
How to Assemble Track Roller Assembly 1764
Remove and Install Revolving Frame Assembly 1767
How to Remove Revolving Frame Assembly 1768
How to Install Revolving Frame Assembly 1775
Remove and Install Counterweight Assembly 1783
How to Remove Counterweight Assembly 1784
How to Install Counterweight Assembly 1788
Hydraulic System 1793
Remove and Install Center Swivel Joint Assembly 1793
How to Remove Center Swivel Joint Assembly 1795
Install Center Swivel Joint Assembly 1800
Disassemble and Assemble Center Swivel Joint Assembly 1806
How to Disassemble Center Swivel Joint Assembly 1806
How to Assemble Center Swivel Joint Assembly 1807
Remove and Install Hydraulic Tank Assembly 1808
How to Remove Hydraulic Tank Assembly 1809
How to Install Hydraulic Tank Assembly 1813
Remove and Install Main Pump Assembly 1818
How to Remove Main Pump Assembly 1819
How to Install Main Pump Assembly 1827
Remove and Install Control Valve Assembly 1836
How to Remove Control Valve Assembly 1838
How to Install Control Valve Assembly 1858
Disassemble and Assemble Control Valve Assembly 1879
How to Assemble Control Valve Assembly 1879
Replace Pressure Reducing Valve Cartridge Assembly 1881
Disassemble and Assemble Work Equipment PPC Valve Assembly 1884
How to Disassemble Work Equipment PPC Valve Assembly 1884
How to Assemble Work Equipment PPC Valve Assembly 1885
Disassemble and Assemble Travel PPC Valve Assembly 1887
How to Disassemble Travel PPC Valve Assembly 1887
How to Assemble Travel PPC Valve Assembly 1888
Work Equipment 1890
Remove and Install Blade Assembly 1890
How to Remove Blade Assembly 1891
How to Install Blade Assembly 1893
Remove and Install Work Equipment Assembly 1896
How to Remove Work Equipment Assembly 1898
How to Install Work Equipment Assembly 1904
Remove and Install Boom Anti-drop Valve Assembly 1910
How to Remove Boom Anti-drop Valve Assembly 1911
How to Install Boom Anti-drop Valve Assembly 1915
Remove and Install Arm Anti-Drop Valve Assembly 1918
How to Remove Arm Anti-Drop Valve Assembly 1919
How to Install Arm Anti-Drop Valve Assembly 1922
Disassemble and Assemble Anti-Drop Valve Assembly 1924
How to Disassemble Anti-Drop Valve Assembly 1924
How to Assemble Anti-Drop Valve Assembly 1924
Disassemble and Assemble Boom Cylinder Assembly 1925
How to Disassemble Boom Cylinder Assembly 1925
How to Assemble Boom Cylinder Assembly 1927
Disassemble and Assemble Arm Cylinder Assembly 1930
How to Disassemble Arm Cylinder Assembly 1930
How to Assemble Arm Cylinder Assembly 1932
Disassemble and Assemble Bucket Cylinder Assembly 1936
How to Disassemble Bucket Cylinder Assembly 1936
How to Assemble Bucket Cylinder Assembly 1938
Disassemble and Assemble Blade Cylinder Assembly 1941
Disassemble Blade Cylinder Assembly 1941
Assemble Blade Cylinder Assembly 1943
CAB Related Parts 1946
Remove and Install Operator Cab Assembly 1946
How to Remove Operator Cab Assembly 1947
How to Install Operator Cab Assembly 1963
Remove and Install Slide Door 1979
How to Remove Slide Door 1979
How to Install Slide Door 1979
Remove and Install Operator Cab Glass (Adhered Glass) 1981
Remove Operator CAB Glass (Adhered Glass) 1982
Install Operator CAB Glass (Adhered Glass) 1983
Remove and Install Front Window Assembly 1992
Remove Front Window Assembly 1992
Install Front Window Assembly 1994
Remove and Install Floor Frame Assembly 1996
How to Remove Floor Frame Assembly 1997
How to Install Floor Frame Assembly 2006
Remove and Install Air Conditioner Unit Assembly 2016
How to Remove Air Conditioner Unit Assembly 2017
How to Install Air Conditioner Unit Assembly 2030
Remove and Install Operator Seat 2043
How to Remove Operator Seat 2044
How to Install Operator Seat 2045
How to Remove and Install Seat Belt 2048
How to Remove Seat Belt 2049
How to Install Seatbelt 2049
Remove and Install Work Equipment Control Lever Assembly 2050
How to Remove Work Equipment Control Lever Assembly 2050
How to Install Work Equipment Control Lever Assembly 2056
Remove and Install Front Wiper Assembly 2064
Remove Front Wiper Assembly 2065
How to Install Front Wiper Assembly 2071
Electrical System 2077
Remove and Install Engine Controller Assembly 2077
How to Remove Engine Controller Assembly 2078
How to Install Engine Controller Assembly 2080
Remove and Install Pump Controller Assembly 2083
Remove Pump Controller Assembly 2084
Install Pump Controller Assembly 2086
Remove and Install Machine Monitor Assembly 2088
How to Remove Machine Monitor Assembly 2089
How to Install Machine Monitor Assembly 2094
Remove and Install Mass Air Flow and Temperature Sensor 2099
How to Remove Mass Air Flow and Temperature Sensor 2100
How to Install Mass Air Flow and Temperature Sensor 2101
Remove and Install Gateway Function Controller 2102
How to Remove Gateway Function Controller 2103
How to Install Gateway Function Controller 2105
60 Maintenance Standard 2109
Table of Contents 2110
Engine and Cooling System 2111
Maintenance Standard for Engine Mount 2111
Maintenance Standard for PTO 2112
Maintenance Standard for Cooling System 2113
Power Train 2114
Maintenance Standard for Swing Circle 2114
Maintenance Standard for Swing Machinery 2116
Maintenance Standard for Sprocket 2118
Undercarriage and Frame 2119
Maintenance Standard for Track Frame and Idler Cushion 2119
Maintenance Standard for Idler 2121
Maintenance Standard for Track Roller 2123
Maintenance Standard for Carrier Roller 2124
Maintenance Standard for Track Shoes 2125
Maintenance Standard for Triple Shoes 2128
Maintenance Standard for Rubber Shoes 2129
Hydraulic System 2130
Maintenance Standard for Hydraulic Tank 2130
Maintenance Standard for Main Pump 2131
Maintenance Standard for Main Pump Servo Valve 2135
Maintenance Standard for PC-EPC Valve 2136
Maintenance Standard for Swing Motor 2137
Maintenance Standard for Travel Motor 2139
Maintenance Standard for Control Valve 2140
Maintenance Standard for Boom Anti-Drop Valve 2150
Maintenance Standard for Arm Anti-Drop Valve 2152
Maintenance Standard for Work Equipment and Swing PPC Valve 2154
Maintenance Standard for Blade PPC Valve 2157
Maintenance Standard for Travel PPC Valve 2159
Maintenance Standard for 1st-Line Attachment PPC Valve (with EPC Valve) 2162
Maintenance Standard for EPC Valve of 1st-Line Attachment PPC Valve 2163
Maintenance Standard for Solenoid Valve 2165
Maintenance Standard for Attachment Oil Flow Adjuster EPC Valve 2166
Maintenance Standard for Attachment Circuit Accumulator (For Low Pressure Circuit) 2167
Maintenance Standard for Center Swivel Joint 2168
Work Equipment 2169
Maintenance Standard for Work Equipment Linkage 2169
Dimensions of Arm 2174
Dimensions of Bucket 2176
Maintenance Standard for Boom Cylinder 2178
Maintenance Standard for Arm Cylinder 2179
Maintenance Standard for Bucket Cylinder 2180
Maintenance Standard for Blade Cylinder 2181
80 Appendix 2183
Table of Contents 2184
Precautions Before Work 2186
Air Conditioner System 2187
Precautions for Refrigerant 2187
Air Conditioner Component 2188
Specifications of Air Conditioner 2190
Structure and Function of Refrigeration Cycle 2191
Outline of Refrigeration Cycle 2192
Component Parts of Air Conditioner System 2194
Air Conditioner Unit 2194
Configuration Diagram of Air Conditioner Unit 2194
Function of Air Conditioner Unit 2196
Component Parts of Air Conditioner Unit 2197
Function of Evaporator as Air Conditioner Unit Component 2198
Function of Heater Core as Air Conditioner Unit Component 2198
Function of Evaporator Temperature Sensor as Air Conditioner Unit Component 2198
Function of Servo Motor as Air Conditioner Unit Component 2199
Structure of Expansion Valve as Air Conditioner Unit Component 2200
Function of Expansion Valve as Air Conditioner Unit Component 2200
Operate Expansion Valve as Air Conditioner Unit Component 2200
Function of Dual Pressure Switch 2201
Air Conditioner Controller 2202
Structure of Air Conditioner Controller 2202
Compressor 2203
Structure of Compressor 2203
Specifications of Compressor 2203
Function of Compressor 2203
Condenser 2204
Structure of Condenser 2204
Specifications of Condenser 2204
Function of Condenser 2204
Receiver Drier 2205
Structure of Receiver Dryer 2205
Specifications of Receiver Dryer 2205
Function of Receiver Dryer 2205
Air Conditioner Related Sensors 2206
Structure of Sunlight Sensor 2206
Function of Sunlight Sensor 2206
Structure of Outside Temperature Sensor 2206
Function of Outside Air Temperature Sensor 2206
Explanation of Procedure for Test of and Troubleshooting of Air Conditioner 2208
Circuit Diagram and Configuration of Connector Pins of Air Conditioner 2210
System Diagram of Air Conditioner 2212
Input and Output Signals of Air Conditioner Controller 2213
Function of Air Conditioner Controller 2214
Locations of Air Conditioner Parts and Layout of Connectors 2215
Examine Air Leakage (Duct) 2221
How to Examine Air Leakage (Duct) 2221
Examine Air Conditioner with Self-Diagnosis Function 2222
Open the Electrical System Abnormality Record Screen in Service Mode of Machine Monitor 2223
Examine Vent (Mode) Changeover 2224
How to Examine Vent (Mode) Changeover 2224
Examine Fresh/Recirc Air Changeover 2225
How to Examine Fresh/Recirc Air Changeover 2225
Examine Sunlight Sensor 2226
How to Examine Sunlight Sensor 2226
Examine Refrigerant (Dual) Pressure Switch 2227
How to Examine Refrigerant (Dual) Pressure Switch 2227
Examine Relay 2229
How to Examine Relay 2229
Air Conditioner Troubleshooting Chart 1 2230
Air Conditioner Troubleshooting Chart 2 2231
Information Shown in Troubleshooting Table 2234
Failure Code [879AKA] 2235
Failure Code [879AKB] 2236
Failure Code [879BKA] 2237
Failure Code [879BKB] 2239
Failure Code [879CKA] 2241
Failure Code [879CKB] 2242
Failure Code [879DKZ] 2243
Failure Code [879EMC] 2245
Failure Code [879FMC] 2246
Failure Code [879GKX] 2247
Troubleshooting for Power Supply System (Air Conditioner Does Not Operate) 2249
Troubleshooting for Compressor and Refrigerant System (Air is Not Cooled) 2251
Troubleshooting for Blower Motor System (No Air Comes Out or Air Flow is Abnormal) 2254
Troubleshooting for Fresh/Recirc Air Changeover 2256
Troubleshooting by Gauge Pressure 2258
Connect Service Tool 2261
How to Connect Service Tool 2261
Precautions for Disconnection and Connection of Air Conditioner Piping 2263
Handle Compressor Oil 2265
90 Circuit Diagrams 2267
Table of Contents 2268
How to Read the Codes for Electric Cable 2269
Hydraulic Circuit Diagram 2273
Symbols Used in Hydraulic Circuit Diagram 2273
Hydraulic Circuit Diagram (1/3) 2277
Hydraulic Circuit Diagram (2/3) 2279
Hydraulic Circuit Diagram (3/3) 2281
Hydraulic Circuit Diagram (at Boom Raise Operation 1/3) 2283
Hydraulic Circuit Diagram (at Boom Raise Operation 2/3) 2285
Hydraulic Circuit Diagram (at Boom Raise Operation 3/3) 2287
Hydraulic Circuit Diagram (at Left Swing Operation 1/3) 2289
Hydraulic Circuit Diagram (at Left Swing Operation 2/3) 2291
Hydraulic Circuit Diagram (at Left Swing Operation 3/3) 2293
Hydraulic Circuit Diagram (at Boom Raise and Left Swing Operation 1/3) 2295
Hydraulic Circuit Diagram (at Boom Raise and Left Swing Operation 2/3) 2297
Hydraulic Circuit Diagram (at Boom Raise and Left Swing Operation 3/3) 2299
Electrical Circuit Diagram 2301
Symbols Used in Electric Circuit Diagram 2301
Electrical Circuit Diagram (1/9) 2305
Electrical Circuit Diagram (2/9) 2307
Electrical Circuit Diagram (3/9) 2309
Electrical Circuit Diagram (4/9) 2311
Electrical Circuit Diagram (5/9) 2313
Electrical Circuit Diagram (6/9) 2315
Electrical Circuit Diagram (7/9) 2317
Electrical Circuit Diagram (8/9) 2319
Electrical Circuit Diagram (9/9) 2321
Electrical Circuit Diagram (Machine with Proportional Control Lever)(1/8) 2323
Electrical Circuit Diagram (Machine with Proportional Control Lever)(2/8) 2325
Electrical Circuit Diagram (Machine with Proportional Control Lever)(3/8) 2327
Electrical Circuit Diagram (Machine with Proportional Control Lever)(4/8) 2329
Electrical Circuit Diagram (Machine with Proportional Control Lever)(5/8) 2331
Electrical Circuit Diagram (Machine with Proportional Control Lever)(6/8) 2333
Electrical Circuit Diagram (Machine with Proportional Control Lever)(7/8) 2335
Electrical Circuit Diagram (Machine with Proportional Control Lever)(8/8) 2337
Index 2339

S.V  21/12/24