Complete service repair manual with Electrical Wiring Diagrams for Komatsu Hydraulic Excavator PC170LC-10, with all the technical information to maintain, diagnose, repair, rebuild like professional mechanics.

Komatsu Hydraulic Excavator PC170LC-10 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.

SEN06367-02 - Hydraulic Excavator PC170LC-10 Shop Manual.pdf

PRODUCT DETAILS:
Total Pages: 1,450 pages
File Format: PDF
Language: English

COVER..1
00 Index and foreword ..3
  Index ..4
  Foreword, safety and general information ..15
    Important safety notice ..15
    How to read the shop manual ..22
    Explanation of terms for maintenance standard ..24
    Handling equipment of fuel system devices ..26
    Handling of intake system parts ..27
    Handling of hydraulic equipment ..28
    Method of disconnecting and connecting of push-pull type coupler ..30
    Handling of electrical equipment ..33
    How to read electric wire code ..41
    Precautions when performing operation ..44
    Practical use of KOMTRAX ..49
    Standard tightening torque table ..50
    List of abbreviation ..56
    Conversion table ..61
01 Specification ..67
  Table of contents ..68
  Specifications ..69
    Specification drawing ..69
    Working range drawings ..70
    Specifications ..71
    Weight table ..74
    Table of fuel, coolant, and lubricants ..75
10 Structure and function ..77
  Table of contents ..78
  Engine and cooling system ..79
    Engine related parts ..79
    VFT ..81
    EGR system piping drawing ..85
    EGR system circuit diagram ..87
    EGR valve ..88
    EGR cooler ..90
    KCCV layout drawing ..92
    KCCV ventilator ..95
    KDOC muffler ..97
    Cooling system ..99
  Power train ..101
    Power train system ..101
    Swing circle ..103
    Swing machinery ..104
    Final drive ..106
  Undercarriage and frame ..108
    Track frame and idler cushion ..108
  Hydraulic system ..110
    Hydraulic component layout ..110
    Valve control ..113
    Hydraulic tank ..115
    CLSS ..117
    Main pump ..121
    Control valve ..147
    Swing motor ..195
    Travel motor ..197
    PPC valve ..212
    Solenoid valve ..234
    Attachment circuit selector valve (for high pressure circuit) ..238
    Attachment circuit selector valve (for low pressure circuit) ..240
    Center swivel joint ..243
    Accumulator ..245
  Work equipment ..246
    Work equipment ..246
    Work equipment shim ..247
    Bucket play adjustment shim ..248
  Cab and its attachments ..249
    Cab mount and cab tipping stopper ..249
    ROPS cab ..250
  Electrical system ..251
    Electrical control system ..251
    Machine monitor system ..296
    KOMTRAX system ..318
    Sensor ..321
20 Standard value tables ..339
  Table of contents ..340
  Standard service value table ..341
    Standard value table for engine ..341
    Standard value table for machine ..343
    Standard value table for electrical system ..357
30 Testing and adjusting ..365
  Table of contents ..366
  Related information on testing and adjusting ..367
    Tools for testing and adjusting ..367
    Sketch of tools for testing and adjusting ..370
  Engine and cooling system ..371
    Testing engine speed ..371
    Testing boost pressure ..372
    Testing exhaust gas color ..374
    Testing and adjusting valve clearance ..375
    Testing compression pressure ..378
    Testing blowby pressure ..382
    Testing engine oil pressure ..383
    Testing fuel pressure ..384
    Testing fuel discharge, return and leakage ..389
    Bleeding air from fuel system ..394
    Testing fuel circuit for leakage ..396
    Handling cylinder cutout mode operation ..397
    Handling no-injection cranking operation ..398
    Checking and adjusting air conditioner compressor belt tension ..399
    Replacing fan belt ..400
  Power train ..401
    Testing swing circle bearing clearance ..401
  Undercarriage and frame ..402
    Testing and adjusting track tension ..402
  Hydraulic system ..403
    Releasing remaining pressure from hydraulic circuit ..403
    Testing oil pressure of control circuit ..404
    Testing and adjusting oil pressure in work equipment, swing, and travel circuits ..405
    Testing and adjusting oil pressure in pump PC control circuit ..409
    Testing and adjusting oil pressure in pump LS control circuit ..412
    Testing outlet pressure of solenoid valve ..416
    Testing PPC valve outlet pressure ..419
    Adjusting play of work equipment and swing PPC valves ..421
    Testing pump swash plate sensor ..422
    Isolating the parts causing hydraulic drift in work equipment ..423
    Testing and adjusting travel deviation ..425
    Testing oil leakage ..427
    Bleeding air from hydraulic circuit ..430
  Cab and its attachments ..432
    Checking cab tipping stopper ..432
    Adjusting mirrors ..433
  Electrical system ..435
    Special functions of machine monitor ..435
    KOMTRAX terminal start-up procedure ..493
    Adjusting rearview camera angle ..496
    Handling voltage circuit of engine controller ..498
    Handling battery disconnect switch ..499
    Testing diodes ..500
  Pm clinic ..501
    Pm Clinic service ..501
40 Troubleshooting ..511
  Table of contents ..512
  Related information on troubleshooting ..518
    Troubleshooting points ..518
    Sequence of events in troubleshooting ..520
    Checks before troubleshooting ..522
    Inspection procedure before troubleshooting ..524
    Preparation work for troubleshooting of electrical system ..542
    Classification and procedure for troubleshooting ..547
    Symptom and troubleshooting numbers ..550
    Information in troubleshooting table ..553
    Procedure for troubleshooting wiring harness of pressure sensor system for open circuit ..555
    Connector list and layout ..558
    Connector contact identification ..568
    T-branch box and T-branch adapter table ..606
    Fuse location table ..611
    Failure codes table ..613
  Troubleshooting by failure code (Display of code) ..620
    Failure code [879AKA] A/C Inner Sensor Open Circuit ..620
    Failure code [879AKB] A/C Inner Sensor Short Circuit ..621
    Failure code [879BKA] A/C Outer Sensor Open Circuit ..622
    Failure code [879BKB] A/C Outer Sensor Short Circuit ..623
    Failure code [879CKA] Ventilating Sensor Open Circuit ..624
    Failure code [879CKB] Ventilating Sensor Short Circuit ..625
    Failure code [879DKZ] Sunlight Sensor Open Or Short Circuit ..626
    Failure code [879EMC] Ventilation Damper Abnormality ..627
    Failure code [879FMC] Air Mix Damper Abnormality ..628
    Failure code [879GKX] Refrigerant Abnormality ..629
    Failure code [989L00] Engine Controller Lock Caution 1 ..630
    Failure code [989M00] Engine Controller Lock Caution 2 ..631
    Failure code [989N00] Engine Controller Lock Caution 3 ..632
    Failure code [AA10NX] Air Cleaner Clogging ..633
    Failure code [AB00KE] Charge Voltage Low ..635
    Failure code [B@BAZG] Eng Oil Press Low ..637
    Failure code [B@BAZK] Eng Oil Level Low ..638
    Failure code [B@BCNS] Eng Water Overheat ..639
    Failure code [B@BCZK] Eng Water Level Low ..640
    Failure code [B@HANS] Hyd Oil Overheat ..642
    Failure code [CA115] Eng Ne and Bkup Speed Sens Error ..643
    Failure code [CA122] Chg Air Press Sensor High Error ..644
    Failure code [CA123] Chg Air Press Sensor Low Error ..646
    Failure code [CA131] Throttle Sensor High Error ..648
    Failure code [CA132] Throttle Sensor Low Error ..650
    Failure code [CA144] Coolant Temp Sens High Error ..652
    Failure code [CA145] Coolant Temp Sens Low Error ..654
    Failure code [CA153] Chg Air Temp Sensor High Error ..656
    Failure code [CA154] Chg Air Temp Sensor Low Error ..658
    Failure code [CA187] Sensor 2 Supply Volt Low Error ..660
    Failure code [CA221] Ambient Press Sensor High Error ..662
    Failure code [CA222] Ambient Press Sens Low Error ..664
    Failure code [CA227] Sensor 2 Supply Volt High Error ..666
    Failure code [CA234] Eng Overspeed ..667
    Failure code [CA238] Ne Speed Sensor Supply Volt Error ..668
    Failure code [CA239] Ne Speed Sens Supply Volt High Error ..669
    Failure code [CA271] IMV/PCV1 Short Error ..670
    Failure code [CA272] IMV/PCV1 Open Error ..672
    Failure code [CA295] Ambient Press Sens In Range Error ..674
    Failure code [CA322] Inj #1(L#1) Open/Short Error ..675
    Failure code [CA324] Inj #3(L#3) Open/Short Error ..677
    Failure code [CA331] Inj #2(L#2) Open/Short Error ..679
    Failure code [CA332] Inj #4(L#4) Open/Short Error ..681
    Failure code [CA343] ECM Critical Internal Failure ..683
    Failure code [CA351] Injectors Drive Circuit Error ..684
    Failure code [CA352] Sensor 1 Supply Volt Low Error ..685
    Failure code [CA356] Mass Air Flow Sensor High Error ..687
    Failure code [CA357] Mass Air Flow Sensor Low Error ..689
    Failure code [CA386] Sensor 1 Supply Volt High Error ..691
    Failure code [CA428] Water in Fuel Sensor High Error ..692
    Failure code [CA429] Water in Fuel Sensor Low Error ..694
    Failure code [CA435] Eng Oil Press Sw Error ..696
    Failure code [CA441] Battery Voltage Low Error ..697
    Failure code [CA442] Battery Voltage High Error ..699
    Failure code [CA449] Rail Press Very High Error ..700
    Failure code [CA451] Rail Press Sensor High Error ..701
    Failure code [CA452] Rail Press Sensor Low Error ..703
    Failure code [CA466] KVGT Motor Driver Position Error ..705
    Failure code [CA488] Chg Air Temp High Torque Derate ..707
    Failure code [CA515] Rail Press Sens Sup Volt High Error ..708
    Failure code [CA516] Rail Press Sens Sup Volt Low Error ..710
    Failure code [CA553] Rail Press High Error ..712
    Failure code [CA555] Crankcase Press High Error 1 ..713
    Failure code [CA556] Crankcase Press High Error 2 ..714
    Failure code [CA559] Rail Press Low Error ..715
    Failure code [CA689] Eng Ne Speed Sensor Error ..719
    Failure code [CA691] Intake Air Temp Sens High Error ..721
    Failure code [CA692] Intake Air Temp Sens Low Error ..723
    Failure code [CA697] ECM Internal Temp Sensor High Error ..725
    Failure code [CA698] ECM Int Temp Sensor Low Error ..726
    Failure code [CA731] Eng Bkup Speed Sens Phase Error ..727
    Failure code [CA778] Eng Bkup Speed Sensor Error ..728
    Failure code [CA1117] Persistent Data Lost Error ..731
    Failure code [CA1695] Sensor 5 Supply Volt High Error ..732
    Failure code [CA1696] Sensor 5 Supply Volt Low Error ..733
    Failure code [CA1843] Crankcase Press Sens High Error ..734
    Failure code [CA1844] Crankcase Press Sens Low Error ..736
    Failure code [CA1896] EGR Valve Stuck Error ..738
    Failure code [CA1942] Crankcase Press Sens In Range Error ..739
    Failure code [CA1961] EGR_Motor Driver IC Over Temp Error ..740
    Failure code [CA2185] Throt Sensor Sup Volt High Error ..741
    Failure code [CA2186] Throt Sensor Sup Volt Low Error ..743
    Failure code [CA2249] Rail Press Very Low Error ..745
    Failure code [CA2272] EGR Valve Pos Sens Low Error ..746
    Failure code [CA2311] IMV Solenoid Error ..748
    Failure code [CA2349] EGR Valve Solenoid Open Error ..749
    Failure code [CA2353] EGR Valve Solenoid Short Error ..751
    Failure code [CA2357] EGR Valve Servo Error ..753
    Failure code [CA2373] Exhaust Manifold Press Sens High Error ..754
    Failure code [CA2374] Exhaust Manifold Press Sens Low Error ..756
    Failure code [CA2375] EGR Orifice Temp Sens High Error ..758
    Failure code [CA2376] EGR Orifice Temp Sens Low Error ..760
    Failure code [CA2554] Exh Manifold Press Sens In Range Error ..762
    Failure code [CA2555] Grid Htr Relay Volt Low Error ..763
    Failure code [CA2556] Grid Htr Relay Volt High Error ..765
    Failure code [CA2961] EGR Orifice Temp High Error 1 ..767
    Failure code [CA2973] Chg Air Press Sensor In Range Error ..768
    Failure code [CA3419] Mass Air Flow Sensor Sup Volt High Error ..769
    Failure code [CA3421] Mass Air Flow Sensor Sup Volt Low Error ..771
    Failure code [CA3724] EGR/KVGT Motor Driver Power Low Error ..773
    Failure code [CA3741] Rail Press Valve Trip Error ..775
    Failure code [CA3918] KVGT Stuck Error ..776
    Failure code [CA3919] KVGT Motor Driver IC Over Temp Error ..777
    Failure code [CA3921] KVGT Servo Error 2 ..778
    Failure code [CA3922] KVGT Motor Driver Open Error ..779
    Failure code [CA3923] KVGT Motor Driver Short Error ..781
    Failure code [D110KB] Battery Relay Drive Short Circuit ..783
    Failure code [D19JKZ] Personal Code Relay Abnormality ..785
    Failure code [D811MC] KOMTRAX Error ..788
    Failure code [D862KA] GPS Antenna Open Circuit ..789
    Failure code [D8ALKA] System Operating Lamp Disconnection (KOMTRAX) ..790
    Failure code [D8ALKB] System Operating Lamp Short Circuit (KOMTRAX) ..792
    Failure code [D8AQKR] CAN2 Discon (KOMTRAX) ..793
    Failure code [DA20MC] Pump Controller Malfunction ..795
    Failure code [DA22KK] Pump Solenoid Power Low Error ..796
    Failure code [DA25KP] 5V Sensor 1 Power Abnormality ..798
    Failure code [DA29KQ] Model Selection Abnormality ..800
    Failure code [DA2LKA] System Operating Lamp Disconnection (Pump Con) ..802
    Failure code [DA2LKB] System Operating Lamp Short Circuit (Pump Con) ..804
    Failure code [DA2QKR] CAN2 Discon (Pump Con) ..805
    Failure code [DA2RKR] CAN1 Discon (Pump Con) ..807
    Failure code [DAF0MB] Monitor ROM Abnormality ..808
    Failure code [DAF0MC] Monitor Error ..809
    Failure code [DAF8KB] Camera Power Supply Short Circuit ..810
    Failure code [DAF9KQ] Model Selection Abnormality ..812
    Failure code [DAFGMC] GPS Module Error ..813
    Failure code [DAFLKA] Operating Lamp Open Circuit(Monitor) ..814
    Failure code [DAFLKB] System Operating Lamp Short Circuit (Monitor) ..816
    Failure code [DAFQKR] CAN2 Discon (Monitor) ..817
    Failure code [DAZ9KQ] A/C Model Selection Abnormality ..818
    Failure code [DAZQKR] CAN2 Discon (Aircon ECU) ..819
    Failure code [DB2QKR] CAN2 Discon (Engine Con) ..823
    Failure code [DB2RKR] CAN1 Discon (Engine Con) ..827
    Failure code [DGH2KB] Hyd Oil Sensor Short Circuit ..832
    Failure code [DHA4KA] Air Cleaner Clogging Sensor Open Circuit ..834
    Failure code [DHPAMA] F Pump Press Sensor Abnormality ..836
    Failure code [DHPBMA] R Pump Press Sensor Abnormality ..838
    Failure code [DHS3MA] Arm Curl PPC Press Sensor Abnormality ..840
    Failure code [DHS4MA] Bucket Curl PPC Press Sensor Abnormality ..842
    Failure code [DHS8MA] Boom Raise PPC Press Sensor Abnormality ..844
    Failure code [DHS9MA] Boom Lower PPC Press Sensor Abnormality ..846
    Failure code [DHSAMA] Swing RH PPC Press Sensor Abnormality ..848
    Failure code [DHSBMA] Swing LH PPC Press Sensor Abnormality ..850
    Failure code [DHSCMA] Arm Dump PPC Press Sensor Abnormality ..852
    Failure code [DHSDMA] Bucket Dump PPC Press Sensor Abnormality ..854
    Failure code [DKR0MA] Pump Swash Plate Sensor Abnormality ..856
    Failure code [DR21KX] Camera 2 Picture Rev. Drive Abnormality ..858
    Failure code [DR31KX] Camera 3 Picture Rev. Drive Abnormality ..860
    Failure code [DV20KB] Travel Alarm Short Circuit ..861
    Failure code [DW43KA] Travel Speed Sol Open Circuit ..863
    Failure code [DW43KB] Travel Speed Sol Short Circuit ..865
    Failure code [DW45KA] Swing Brake Sol Open Circuit ..867
    Failure code [DW45KB] Swing Brake Sol Short Circuit ..870
    Failure code [DW91KA] Travel Junction Sol Open Circuit ..872
    Failure code [DW91KB] Travel Junction Sol Short Circuit ..874
    Failure code [DWA2KA] Attachment Sol Open Circuit ..876
    Failure code [DWA2KB] Attachment Sol Short Circuit ..878
    Failure code [DWJ0KA] Merge-divider Sol Open Circuit ..879
    Failure code [DWJ0KB] Merge-divider Sol Short Circuit ..880
    Failure code [DWK0KA] 2-Stage Relief Sol Open Circuit ..881
    Failure code [DWK0KB] 2-Stage Relief Sol Short Circuit ..883
    Failure code [DXA8KA] PC-EPC Sol Open Circuit ..884
    Failure code [DXA8KB] PC-EPC Sol Short Circuit ..886
    Failure code [DXE4KA] Attachment Flow EPC Open Circuit ..888
    Failure code [DXE4KB] Attachment Flow EPC Short Circuit ..890
    Failure code [DY20KA] Wiper Working Abnormality ..891
    Failure code [DY20MA] Wiper Parking Abnormality ..893
    Failure code [DY2CKB] Washer Drive Short Circuit ..895
    Failure code [DY2DKB] Wiper Drive (Fwd) Short Circuit ..897
    Failure code [DY2EKB] Wiper Drive (Rev) Short Circuit ..899
  Troubleshooting of electrical system (E-mode) ..901
    E-1 Engine does not start (Engine does not crank) ..901
    E-2 Manual preheating system does not work ..907
    E-3 Automatic preheating system does not work ..910
    E-4 While preheating is working, preheating monitor does not light up ..912
    E-5 When starting switch is turned to ON position, machine monitor displays nothing ..914
    E-6 While starting switch is turned to ON position (with engine stopped), engine oil level monitor lights up in yellow ..917
    E-7 While starting switch is turned to ON position (with engine stopped), radiator coolant level monitor lights up in yellow ..918
    E-8 Engine coolant temperature monitor lights up in red while engine is running ..919
    E-9 Hydraulic oil temperature monitor lights up in red while engine is running ..920
    E-10 Charge level monitor lights up in red while engine is running ..921
    E-11 Fuel level monitor lights up in red while engine is running ..922
    E-12 Air cleaner clogging monitor lights up in yellow while engine is running ..923
    E-13 Water separator monitor lights up in red while engine is running ..924
    E-14 Engine coolant temperature monitor lights up in red while engine is running ..925
    E-15 Hydraulic oil temperature monitor lights up in red while engine is running ..926
    E-16 Engine oil pressure monitor lights up in red while engine is running ..927
    E-17 Fuel gauge display does not move from minimum or maximum ..928
    E-18 Fuel gauge indicates incorrect amount (indicates neither full nor empty) ..929
    E-19 Engine coolant temperature gauge display does not move from minimum or maximum ..930
    E-20 Engine coolant temperature gauge indicates incorrect temperature (indicates neither full nor empty) ..931
    E-21 Hydraulic oil temperature gauge does not move from minimum or maximum ..932
    E-22 Hydraulic oil temperature gauge indicates incorrect temperature (indicates neither full nor empty) ..934
    E-23 Contents of display on machine monitor is different from actual machine condition ..935
    E-24 Some areas of machine monitor screen are not displayed ..936
    E-25 Function switch does not work ..937
    E-26 Automatic warm-up system does not operate (in cold season) ..938
    E-27 Auto-deceleration monitor does not light up, or does not go out, while auto-deceleration switch is operated ..939
    E-28 Auto-deceleration function does not operate or is not canceled while lever is operated ..940
    E-29 Working mode selection screen is not displayed while working mode selector switch is operated ..941
    E-30 Setting of engine and hydraulic pump is not changed while working mode is changed ..942
    E-31 Travel speed monitor does not change when travel speed switch is operated ..943
    E-32 Travel speed does not change while travel speed selection is changed ..944
    E-33 Alarm buzzer does not stop sounding ..945
    E-34 Service meter is not displayed, while starting switch is in OFF position ..946
    E-35 Service mode cannot be selected ..947
    E-36 Any of work equipment, swing and travel does not work ..948
    E-37 Any of work equipment, swing and travel cannot be locked ..950
    E-38 Upper structure does not swing while swing parking brake cancel switch is set to CANCEL position ..952
    E-39 Swing brake does not operate while swing parking brake cancel switch is set to NORMAL position ..954
    E-40 One-touch power maximizing function does not operate, or indicator is not displayed on monitor ..956
    E-41 One-touch power maximizing function cannot be canceled ..958
    E-42 Alarm does not sound during travel ..959
    E-43 Alarm does not stop sounding while machine is stopped ..960
    E-44 Horn does not sound ..961
    E-45 Horn does not stop sounding ..963
    E-46 Wiper monitor does not light up, or does not go out, while wiper switch is operated ..964
    E-47 Wiper does not operate while wiper switch is operated ..965
    E-48 Window washer does not operate while window washer switch is operated ..967
    E-49 Boom LOWER is not displayed correctly with monitoring function ..968
    E-50 Arm OUT is not displayed correctly with monitoring function ..969
    E-51 Arm IN is not displayed correctly with monitoring function ..970
    E-52 Boom RAISE is not displayed correctly with monitoring function ..971
    E-53 Bucket CURL is not displayed correctly with monitoring function ..972
    E-54 Bucket DUMP is not displayed correctly with monitoring function ..973
    E-55 Swing is not displayed correctly with monitoring function ..974
    E-56 Travel is not displayed correctly with monitoring function ..975
    E-57 Service is not displayed correctly with monitoring function ..977
    E-58 Attachment hydraulic circuit cannot be changed ..979
    E-59 KOMTRAX system does not operate normally ..980
  Troubleshooting of hydraulic and mechanical system (H-mode) ..981
    Information described in troubleshooting table (H-mode) ..981
    System chart of hydraulic and mechanical systems ..982
    Failure mode and cause table ..984
    H-1 All of work equipments, swing and travel operations lack speed or power ..992
    H-2 Engine speed drops significantly or engine stalls ..994
    H-3 All work equipment, swing and travel does not work ..995
    H-4 Unusual sound is heard from around hydraulic pump ..996
    H-5 Fine control performance or response is poor ..997
    H-6 Boom speed or power is low ..998
    H-7 Arm speed or power is low ..1001
    H-8 Bucket speed or power is low ..1004
    H-9 Work equipment does not move in single operation ..1006
    H-10 Hydraulic drift of boom is large ..1007
    H-11 Hydraulic drift of arm is large ..1008
    H-12 Hydraulic drift of bucket is large ..1009
    H-13 Time lag of work equipment is large ..1010
    H-14 When part of work equipment is relieved singly, other parts of work equipment move ..1012
    H-15 One-touch power maximizing function does not operate ..1013
    H-16 In combined operation of work equipment, equipment having heavier load moves slower ..1014
    H-17 In combined operations of swing and boom RAISE, boom rising speed is low ..1015
    H-18 In combined operation of swing and travel, travel speed drops largely ..1016
    H-19 Machine does not travel straight ..1017
    H-20 Travel speed is slow ..1019
    H-21 Machine is hard to steer or travel power is low ..1021
    H-22 Travel speed does not change, or travel speed is too slow or fast ..1024
    H-23 One of tracks does not run ..1025
    H-24 Upper structure does not swing to the right or left ..1027
    H-25 Upper structure swing only to the right or left ..1028
    H-26 Swing acceleration or swing speed is low in both directions (right and left) ..1029
    H-27 Swing acceleration performance is poor or swing speed is slow in only one direction ..1030
    H-28 Upper structure overruns excessively when it stops swinging (both right and left) ..1031
    H-29 Upper structure overruns excessively when it stops swinging (either right or left) ..1032
    H-30 Shock is large when upper structure stops swinging ..1033
    H-31 Large unusual noise is heard when upper structure stops swinging ..1034
    H-32 Swing drift on a slope is large while swing parking brake is applied ..1035
    H-33 Swing drift on a slope is large while swing parking brake is released ..1036
    H-34 Attachment hydraulic circuit cannot be changed while attachment is installed ..1037
    H-35 Oil flow in attachment circuit cannot be controlled ..1038
  Troubleshooting of engine (S-mode) ..1039
    Information mentioned in troubleshooting table (S mode) ..1039
    S-1 Engine does not crank when starting switch is turned to START position ..1040
    S-2 Engine cranks but no exhaust smoke comes out ..1041
    S-3 Fuel is being injected but engine does not start (misfiring: engine cranks but does not start) ..1042
    S-4 Engine startability is poor ..1043
    S-5 Engine does not pick up smoothly ..1045
    S-6 Engine stops during operation ..1047
    S-7 Engine runs rough or is unstable ..1049
    S-8 Engine lacks power ..1050
    S-9 Exhaust smoke is black ..1052
    S-10 Engine oil consumption is excessive ..1054
    S-11 Oil becomes contaminated quickly ..1055
    S-12 Fuel consumption is excessive ..1056
    S-13 Oil is in coolant (or coolant spurts or coolant level goes down) ..1057
    S-14 Oil pressure drops ..1058
    S-15 Fuel mixes into engine oil ..1059
    S-16 Water mixes into engine oil (milky) ..1060
    S-17 Coolant temperature rises too high (overheating) ..1061
    S-18 Unusual noise is heard ..1062
    S-19 Vibration is excessive ..1063
    S-20 Air cannot be bled from fuel circuit ..1064
50 Disassembly and assembly ..1065
  Table of contents ..1066
  Related information on disassembly and assembly ..1068
    How to read this manual ..1068
    Coating materials list ..1070
    Special tools list ..1074
    Sketches of special tools ..1079
  Engine and cooling system ..1083
    Removal and installation of supply pump assembly ..1083
    Removal and installation of injector assembly ..1087
    Removal and installation of cylinder head assembly ..1093
    Removal and installation of radiator assembly ..1110
    Removal and installation of hydraulic oil cooler assembly ..1112
    Removal and installation of aftercooler assembly ..1115
    Removal and installation of engine and main pump assembly ..1117
    Removal and installation of engine front oil seal ..1124
    Removal and installation of engine rear oil seal ..1128
    Removal and installation of fuel cooler assembly ..1131
    Removal and installation of fuel tank assembly ..1133
    Removal and installation of engine hood assembly ..1135
    Removal and installation of KDOC assembly ..1137
    Removal and installation of KCCV assembly ..1139
    Removal and installation of air cleaner assembly ..1144
  Power train ..1146
    Removal and installation of travel motor and final drive assembly ..1146
    Disassembly and assembly of final drive assembly ..1147
    Removal and installation of swing motor and swing machinery assembly ..1156
    Disassembly and assembly of swing machinery assembly ..1158
    Removal and installation of swing circle assembly ..1165
  Undercarriage and frame ..1166
    Separation and connection of track shoe assembly ..1166
    Removal and installation of sprocket ..1168
    Removal and installation of idler and idler cushion assembly ..1169
    Disassembly and assembly of idler assembly ..1170
    Disassembly and assembly of idler cushion assembly ..1173
    Disassembly and assembly of track roller assembly ..1175
    Disassembly and assembly of carrier roller assembly ..1177
    Removal and installation of revolving frame assembly ..1180
    Removal and installation of counterweight assembly ..1182
  Hydraulic system ..1184
    Removal and installation of center swivel joint assembly ..1184
    Disassembly and assembly of center swivel joint assembly ..1187
    Removal and installation of hydraulic tank assembly ..1188
    Removal and installation of main pump assembly ..1192
    Removal and installation of main pump input shaft oil seal ..1195
    Removal and installation of control valve assembly ..1196
    Disassembly and assembly of control valve assembly ..1200
    Disassembly and assembly of work equipment PPC valve assembly ..1202
    Disassembly and assembly of travel PPC valve assembly ..1204
  Work equipment ..1206
    Removal and installation of work equipment assembly ..1206
    Disassembly and assembly of work equipment cylinder assembly ..1209
  Cab and its attachments ..1215
    Removal and installation of operator's cab assembly ..1215
    Removal and installation of operator cab glass (adhered glass) ..1220
    Removal and installation of front window assembly ..1230
    Removal and installation of floor frame assembly ..1236
    Removal and installation of air conditioner unit assembly ..1241
    Removal and installation of operator's seat ..1245
    Removal and installation of seat belt ..1247
    Removal and installation of front wiper assembly ..1249
  Electrical system ..1256
    Removal and installation of air conditioner compressor assembly ..1256
    Removal and installation of air conditioner condenser assembly ..1258
    Removal and installation of engine controller assembly ..1260
    Removal and installation of pump controller assembly ..1262
    Removal and installation of machine monitor assembly ..1265
    Removal and installation of pump swash plate sensor ..1267
    Removal and installation of mass air flow and temperature sensor ..1268
    Removal and installation of KOMTRAX terminal assembly ..1269
60 Maintenance standard ..1271
  Table of contents ..1272
  Engine and cooling system ..1273
    Engine mount ..1273
    Cooling system ..1274
  Power train ..1275
    Swing circle ..1275
    Swing machinery ..1276
    Final drive ..1277
    Sprocket ..1279
  Undercarriage and frame ..1281
    Track frame and idler cushion ..1281
    Idler ..1283
    Track roller ..1285
    Carrier roller ..1286
    Track shoe ..1287
  Hydraulic system ..1291
    Hydraulic tank ..1291
    Main pump ..1292
    Control valve ..1295
    Travel motor ..1306
    Work equipment and swing PPC valve ..1309
    Travel PPC valve ..1312
    1st-line attachment PPC valve (with EPC valve) ..1315
    2nd-line attachment PPC valve ..1318
    Solenoid valve ..1320
    Attachment circuit selector valve (for high-pressure circuit) ..1321
    Attachment circuit selector valve (for low-pressure circuit) ..1322
    Center swivel joint ..1323
  Work equipment ..1324
    Work equipment ..1324
    Boom cylinder ..1333
    Arm cylinder ..1334
    Bucket cylinder ..1335
80 Appendix ..1337
  Table of contents ..1338
  Air conditioner components ..1339
    Precautions for refrigerant ..1339
    Air conditioner component ..1340
    Configuration and function of refrigeration cycle ..1343
    Outline of refrigeration cycle ..1344
    Air conditioner unit ..1346
    Dual pressure switch ..1353
    Air conditioner controller ..1354
    Compressor ..1355
    Air conditioner condenser ..1356
    Sunlight sensor ..1358
    Outer temperature sensor (outside air temperature sensor) ..1359
    Procedure for testing and troubleshooting ..1360
    Circuit diagram and arrangement of connector pins ..1362
    System diagram ..1364
    Input and output signals of the air conditioner controller ..1365
    Parts and connectors layout ..1367
    Testing air leakage (duct) ..1371
    Testing with self-diagnosis function ..1374
    Testing vent (mode) changeover ..1377
    Testing FRESH/RECIRC air changeover ..1379
    Testing sunlight sensor ..1380
    Testing (dual) pressure switch for refrigerant ..1381
    Testing relays ..1382
    Troubleshooting chart 1 ..1383
    Troubleshooting chart 2 ..1384
    Information in troubleshooting table ..1387
    Failure code list related to air conditioner ..1388
    Failure code [879AKA] A/C Inner Sensor Open Circuit ..1389
    Failure code [879AKB] A/C Inner Sensor Short Circuit ..1390
    Failure code [879BKA] A/C Outer sensor Open Circuit ..1391
    Failure code [879BKB] A/C Outer sensor Short Circuit ..1393
    Failure code [879CKA] Ventilating Sensor Open Circuit ..1395
    Failure code [879CKB] Ventilating Sensor Short Circuit ..1396
    Failure code [879DKZ] Sunlight sensor Open or Short Circuit ..1397
    Failure code [879EMC] Ventilation Damper Abnormality ..1399
    Failure code [879FMC] Air Mix Damper Abnormality ..1400
    Failure code [879GKX] Refrigerant Abnormality ..1401
    A-1 Troubleshooting for power supply system (Air conditioner does not operate) ..1402
    A-2 Troubleshooting for compressor and refrigerant system (Air is not cooled) ..1404
    A-3 Troubleshooting for blower motor system (No air comes out or air flow is abnormal) ..1407
    A-4 Troubleshooting for FRESH/RECIRC air changeover ..1409
    Troubleshooting with gauge pressure ..1411
    Connection of service tool ..1414
    Precautions for disconnecting and connecting air conditioner piping ..1416
    Handling of compressor oil ..1418
    Desiccant replacement ..1420
90 Diagrams and drawings ..1423
  Table of contents ..1424
  Hydraulic circuit diagram ..1425
    Symbols in hydraulic circuit diagram ..1425
    Hydraulic circuit diagram ..1428
  Electric circuit diagram ..1430
    Symbols in electric circuit diagram ..1430
    Electrical circuit diagram ..1434
    Electric circuit diagram for air conditioner unit ..1440
INDEX..1441

Komatsu Hydraulic Excavator PC170LC Repair Service Manuals