Volvo EC120D Excavators Service Repair Manual
Complete repair service manual with Electrical Wiring Diagrams for Volvo EC120D Excavators, with technical information to maintain, diagnosse, and repair like professional mechanics.
Volvo EC120D Excavators 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.
MAIN SECTIONS
0 - GENERAL
1 - STANDARD PARTS, SERVICE
2 - ENGINE WITH MOUNTING AND EQUIPMENT
3 - ELEC. SYSTEM; WARNING SYSTEM; INFORMATION SYSTEM; INSTRUMENTS
4 - POWER TRANSMISSION
7 - FRAME; SPRINGS; DAMPING; AXLE SUSPENSION; WHEEL_TRACK UNIT
8 - MACHINERY HOUSE; CAB; EXTERIOR TRIM PARTS ANYWHERE
9 - HYDRAULIC SYSTEM; DIGGING_HANDLING_GRADING EQUIPM.; MISC EQUIPM
Volvo EC120D Excavators Service Repair Manual.pdf
PRODUCT DETAILS:
Total Pages: 2,523
File Format: PDF
Language: English
TABLE OF CONTENTS
0 - GENERAL...2
03 - SPECIFICATIONS...3
Tightening torques...4
Measurement conversion tables...15
07 - STANDARD TIME...24
Operation numbers for additional work...25
09 - MISCELLANEOUS...27
Service positions...28
Welding on the machine...31
Hydraulic cylinders; dieseling...34
1 - STANDARD PARTS; SERVICE...38
16 - LUBRICANT; FUEL; OTHER FLUID...39
Engine oil...40
Fuel...43
Hydraulic oil...44
Recommended lubricants...49
Coolant_{41-13}...53
Coolant_{40-34}...58
Coolant with freezing and corrosion protection...62
Grease...66
Alternative fuels...70
Change capacities...73
17 - SERVICE...74
Bearings...77
Replacement parts...81
Safety when servicing...85
Service...89
Service methods...92
Pressure testing...96
Hoses and tubes...100
Cleaning prior to repair...104
Tech Tool; operations...108
Maintenance service; first 500 hours...109
Maintenance service; every 10 hours...110
Maintenance service; every 50 hours...111
Maintenance service; every 250 hours...112
Maintenance service; every 500 hours...113
Maintenance service; every 1000 hours...115
Maintenance service; every 1500 hours...117
Maintenance service; every 2000 hours...119
Maintenance service; every 3000 hours...121
Maintenance service; every 4000 hours...123
Maintenance service; every 6000 hours...125
Service position...126
Lubrication; every 50 hours...128
Test running and checking...129
Lubricant hose; checking...131
Crankcase ventilation separator; checking...132
Crankcase ventilation separator element; replacing...134
Crankcase ventilation separator rubber hoses; checking...136
Valves; adjusting...138
Engine oil level; checking...143
Engine oil and filter; changing...145
Fuel filter; replacing...148
Water separator filter; replacing...150
Fuel tank breather filter; replacing...152
Fuel hoses; checking...154
Injection pump; checking...155
Fuel injectors; checking...156
Air inlet hose; checking...157
Turbocharger; checking...159
Engine air cleaner primary filter; replacing...161
Engine air cleaner secondary filter; replacing...163
Charge air pressure sensor; checking...165
Coolant; changing...167
Coolant freezing point; checking...170
Fan_alternator belt; checking...173
Radiator hoses; checking...175
Radiator and hydraulic oil cooler; cleaning...177
Engine coolant hoses; checking...179
EGR system; checking...181
EGR pipes; checking...186
EGR cooler hose; checking...188
EGR cooler; checking...190
MATRIS and Tech Tool; reading...192
CareTrack backup battery; replacing...195
Track gearbox oil level; checking...198
Track gearbox oil; changing...200
Swing gearbox oil level; checking...202
Swing gearbox oil; changing...204
Swing ring gear bearing; lubricating...206
Swing bath grease; checking...208
Track shoe bolts; checking...210
Track tension and condition; checking...212
Cab door; covers; hinges; joints and locks; lubricating...214
Air conditioner main filter; cleaning...216
Air conditioner main filter; replacing...219
Cab prefilter; cleaning...222
Cab prefilter; replacing...224
Air conditioner compressor belt; checking...226
Hydraulic oil level; checking...228
Hydraulic oil; changing...230
Hydraulic oil suction strainer; cleaning...232
Hydraulic oil servo filter; replacing...234
Hydraulic oil return filter; replacing...236
Hydraulic oil tank breather filter; replacing...239
Measuring condition...242
Cylinder speed...245
Creeping of hydraulic cylinder...248
Swing speed...251
Coasting left and right swing...252
Measuring of swing bearing clearance...254
Travel Speed...257
Track running speed...259
Straight traveling performance...261
19 - GENERAL...263
Safety concerns everybody!...264
CE-marking; EMC-directive...268
Cautions during operation...272
Safety when handling the machine...279
Safety rules when servicing...286
Move and operate machine safely...291
Fire prevention measures...294
Health hazards with paint; plastics and rubber...300
Checklist after a fire or heat exposure...305
Safety when using lifting equipment...309
Safety when handling oils and fuel...313
Safety when working with batteries...317
Starting with booster batteries...322
Safety when working with air conditioning refrigerant...326
Safety when working with hydraulic systems...331
Environmental handling for the future...335
Environmentally safe handling...339
Environmentally hazardous fluids...343
Working in environmentally contaminated areas...347
Decontamination...351
Waste handling...355
2 - ENGINE WITH MOUNTING AND EQUIPMENT...359
20 - GENERAL...360
Engine; description...361
Component locations...365
Tech Tool; operations...368
E-ECU MID 128 pre-programmed; replacing...369
E-ECU MID 128 non-programmed; replacing...371
Engine belts; replacing...373
21 - ENGINE...376
Engine; specifications...377
Engine characteristic curve...378
Engine rotation speed sensor (crank shaft); replacing...381
Engine; removing...384
Engine; installing...392
Engine; tightening torques...400
Valve system specifications...402
Valves; adjusting...404
Crankshaft front oil seal; replacing...409
Crankshaft rear oil seal; replacing...412
22 - LUBRICATING SYSTEM...416
Lubricating system; description...417
Lubrication system; specifications...421
Lubrication system; tightening torques...422
Lubrication system; component locations...423
Lubrication oil pressure; checking with pressure gauge...425
Oil cooler; replacing...427
23 - FUEL SYSTEM...430
Fuel system; description...431
Fuel system; specifications...436
Fuel system; tightening torques...437
Fuel system; component location...438
Fuel tank; volume...440
Fuel filler pump; specifications...441
Fuel tank; description...442
Injectors; replacing...444
Overflow pipe; inspecting...448
Fuel rail; replacing...451
Fuel pump unit; replacing...455
25 - INLET & EXHAUST SYSTEM...462
Inlet and exhaust system; description...463
Inlet and exhaust system; component location...468
Inlet and exhaust system; tightening torques...470
Turbocharger; inspecting...471
Turbocharger; description...473
Turbocharger; replacing...475
Wastegate; checking...477
Charge air cooler; replacing...479
26 - COOLING SYSTEM...486
Cooling system; description...487
Cooling system; component location...491
Cooling system; tightening torques...493
Cooling system; specification...495
Coolant anti-freeze resistance; checking...496
Coolant; changing...501
Expansion tank; replacing...504
Coolant pump; replacing...507
Thermostat; replacing...511
Thermostat; checking...514
27 - ENGINE CONTROL...518
Engine - Pump control; specification...519
29 - MISCELLANEOUS...521
Exhaust Gas Recirculation (EGR); description...522
Exhaust gas recirculation (EGR); component location...526
3 - ELECTRICAL; WARNING; INFORMATION; INSTRUMENTS...528
30 - GENERAL...529
Electrical system; special instructions for servicing; general...533
Electrical system; special instructions for servicing; electronic components...537
Electrical system; special instructions for servicing; electrical components; batteries...540
Electrical system; special instructions for servicing; electrical components; alternator and charging regulator...544
Electrical system; special instructions for servicing; action when working on machine...547
Electrical system; description...550
Electronic control system; description...552
Communication with data buses...555
Auxiliary start...557
Data buses; function...561
Service connection and programming connection...566
Electrical system; specifications...569
Tech Tool; operations...572
Auto torque down...574
Limp Home Control...575
CareTrack with anti-theft...576
Safe start and stop; description...585
X1 control; description...587
X3 control; description...590
Mode selection; description...593
Boom float position; description ...597
Overload warning...599
Auto Idle...602
ECO mode; description...604
Software parameters; description...606
Automatic engine shut-down...611
General fault diagnosis information...614
Troubleshooting strategy...616
Collection of basic data...619
Information display; check...623
Error codes; build-up...626
Conditions when checking...631
Lead and connector checks...636
Special tools for troubleshooting...642
AL3201; description and measuring...644
BA3101; description and measuring...647
FU18; description and measuring...649
FU26; description and measuring...651
FX1052; description and measuring...653
FX1053; description and measuring...656
HE2501; description and measuring...659
MA2301-MA2304; description and measuring...661
MA2310; description and measuring...663
MA4212; description and measuring...665
MA9109; description and measuring...667
MA9116; description and measuring...669
MA9117; description and measuring...671
MA9120; description and measuring...673
MA9125; description and measuring...675
MID140 PID251; description and measuring...677
MID140 PPID1144; description and measuring...682
MO3301; description and measuring...684
Power supply ECC; description and measuring...686
Power supply E-ECU; description and measuring...689
Power supply I-ECU; description and measuring...691
Power supply V-ECU; description and measuring...694
Power supply W-ECU; description and measuring...696
PWM9109; description and measuring...698
PWM9123; description and measuring...700
PWM9124; description and measuring...702
PWM9141; description and measuring...704
PWM9145; description and measuring...706
PWM9146; description and measuring...708
RE4206; description and measuring...710
SAE J1708_1587 Information link; description and measuring...715
SAE J1939_CAN control link; description and measuring...718
SE2206; description and measuring...721
SE2302; description and measuring...723
SE2303; description and measuring...725
SE2306; description and measuring...728
SE2309; description and measuring...730
SE2502; description and measuring...732
SE2507; description and measuring...734
SE2508; description and measuring...736
SE2603; description and measuring...738
SE2606; description and measuring...740
SE2709; description and measuring...742
SE2710; description and measuring...744
SE8701; description and measuring...746
SE8702; description and measuring...749
SE8705; description and measuring...752
SE8706; description and measuring...755
SE9105; description and measuring...758
SE9136; description and measuring...761
SE9401; description and measuring...764
SID254; description and measuring...767
SW2701; description and measuring...768
SW3301; description and measuring...770
SW9160; description and measuring...772
SW9161; description and measuring...774
SW9162; description and measuring...776
31 - BATTERY...778
Battery; storage...779
Battery; description...782
Battery; specifications...785
Battery charging capacity; checking...786
Battery; charging...789
Batteries; replacing...792
Earth lead to battery; replacing...795
32 - ALTERNATOR; CHARGE REGULATOR...797
Charging; description...798
Alternator; specifications...800
Alternator; description...801
Alternator; replacing incl function checking...804
Alternator; testing...808
33 - STARTING SYSTEM...812
Starting operation...813
Starter motor; description...815
Starter motor; specifications...817
Starter motor; testing...819
Starter relay; replacing...823
Starter motor; replacing...825
Starter switch; testing...827
35 - LIGHTING...830
Work lights and extra lights; description...831
Work lights and extra lights; specifications...834
Work lighting headlamp assembly; replacing...837
36 - OTHER ELECTRICAL EQUIPMENT...839
Engine speed control switch; replacing ...840
Electric horn; specifications...844
Horn; replacing...847
Rotating beacon; specifications...849
Rotating beacon; replacing...851
Travel alarm; specifications...853
Travel alarm; replacing...856
Windscreen wiper front motor; replacing...858
Windscreen wiper switch; replacing...863
Windscreen flusher pump; replacing...866
Windscreen wiper controller; replacing...868
Windscreen wiper; description...872
Wiper controller; description...874
Wiper controller; specifications...876
Upper wiper motor; description...878
Upper wiper motor; specifications...880
Windscreen flusher pump; specifications...882
Window limit switch; description...884
Connectors; overview...887
Control lockout lever switch; replacing...893
Ignition switch; replacing...896
Start switch; description...898
Start switch; specifications...901
Instrument control unit I-ECU; functional description...903
Instrument control unit I-ECU; specifications...906
I-ECU MID 140 non-programmed; replacing...908
I-ECU MID 140 pre-programmed; replacing...911
V-ECU MID 187 non-programmed; replacing...914
V-ECU MID 187 pre-programmed; replacing...918
Engine speed control switch; replacing...922
37 - CABLE; FUSE; RELAY...926
Electrical symbols and designations...928
Explanation of wiring diagrams...933
Component designations...937
Component list Alternator; batteries; capacitors; electronic units; voltage outlet...940
Component list; fuses...942
Component list; Heating coils...944
Component list; lights...945
Component list; Miscellaneous...946
Component list; motors...947
Component list; relays...948
Component list; sensors...949
Component list; Solenoid valves...951
Component list; Switches...952
Wiring diagram...954
Wiring diagram SCH01...956
Wiring diagram SCH02...961
Wiring diagram SCH03...964
Wiring diagram SCH04...968
Wiring diagram SCH07...972
Wiring diagram SCH08...975
Wiring diagram SCH10...979
Wiring diagram SCH11...982
Wiring diagram SCH12...985
Wiring diagram SCH13...989
Wiring diagram SCH14...993
Wiring diagram SCH15...996
Wiring diagram SCH16...1000
Wiring diagram SCH17...1003
Wiring diagram SCH18...1006
Wiring diagram SCH22...1009
Wiring diagram SCH25...1012
Wiring diagram SCH30...1015
Engine wire harness; replacing...1018
Battery disconnector; replacing...1022
Electrical distribution box...1025
Electrical distribution box; circuit board replacing...1027
Fuse; description...1032
Relay; description...1035
Relay; specifications...1038
Circuit breaker; specification...1040
38 - INSTRUMENT; SENSOR; WARNING & INFORMATION SYSTEM...1042
Instruments and controls; overview...1043
Instruments and controls; front instrument panel...1045
Instruments and controls; left instrument panel...1047
Instruments and controls; right instrument panel...1048
Instruments and controls; rear instrument panel...1051
Hour counter; specifications...1053
Hour meter; replacing...1055
Fuel level sender; replacing...1058
Control lockout lever switch; description...1061
Control lockout lever switch; specifications...1064
Hydraulic oil temperature sensor; replacing...1067
Display unit...1069
Control types for X1 and X3 operation...1091
Keypad; description...1094
Keypad; specification...1097
Service mode...1100
Engine system...1103
Hydraulic system...1106
Electrical system...1109
Vehicle information...1113
Rear view camera; specifications...1115
39 - MISCELLANEOUS...1116
Radio; description...1117
Radio with CD and MP3 player; description...1120
Radio; replacing...1123
DC–DC converter; description...1128
DC–DC converter; specifications_{06-13}...1131
DC–DC converter; specifications_{05-51}...1134
Voltage converter; replacing...1140
Antenna; replacing...1145
Speaker; replacing...1148
CareTrack W-ECU; description...1150
W-ECU; MID142; changing non-programmed ECU...1155
W-ECU; MID142; changing pre-programmed ECU...1158
CareTrack battery; replacing...1161
4 - POWER TRANSMISSION...1165
40 - GENERAL...1166
Tightening torque; specifications...1167
Power transmission; description...1169
43 - GEARBOX...1172
Function description ...1173
Track gearbox; specifications...1175
Track gearbox; description...1176
Track gearbox; maintenance standard...1182
Track unit; replacing...1185
Track gearbox cover; replacing...1189
Track gearbox; disassembly...1192
Track gearbox; assembly...1198
Function description...1206
Swing gearbox; specifications...1208
Swing gearbox; description_{50-44}...1209
Swing gearbox; description_{50-16}...1212
Swing gearbox; maintenance standard...1216
Swing unit; replacing...1218
Swing gearbox; replacing...1223
Swing gearbox removed; seal replacing...1227
Swing gearbox removed; replacing shaft...1229
Swing gearbox; disassembly...1239
Swing gearbox; assembly...1246
44 - HYDROSTATIC DRIVE...1255
Track motor; specifications...1256
Track motor; description...1257
Track motor; maintenance standard...1268
Track motor relief valve; replacing...1276
Swing motor; specifications...1280
Swing motor; description...1281
Swing motor; maintenance standard...1285
Swing motor; replacing...1292
Swing motor relief valve; replacing...1296
Swing motor removed; seal replacing...1298
Swing motor; replacing brake piston seal...1302
Swing motor; replacing plate (brake)...1307
Swing motor; disassembly...1312
Swing motor; assembly...1318
Hydraulic pump coupling; description...1327
Pump gearbox coupling assembly; replacing...1329
Center passage; specifications...1330
Center passage; description...1331
Center passage; maintenance standard...1333
Center passage; replacing...1338
Center passage; replacing seal kit...1345
Center passage; disassembly...1351
Center passage; assembly...1356
49 - MISCELLANEOUS...1363
Swing ring gear; specifications...1364
Swing ring gear; description...1365
Swing ring gear; replacing...1368
Swing ring gear grease pipe; replacing...1371
Swing ring gear inner seal; replacing...1376
Swing ring gear outer seal; replacing...1380
7 - FRAME; SPRINGS; DAMPING; AXLE SUSPENSION; WHEEL_TRACK UNIT...1387
70 - GENERAL...1388
Undercarriage; tightening torque...1389
Frame and track unit; specifications...1391
Frame and track unit; description...1392
71 - FRAME...1394
Machine weight; specifications...1395
Superstructure; removing...1397
Superstructure; installing...1402
Tightening torque; specifications_{17-28}...1407
Tightening torque; specifications_{17-03}...1408
Counterweight; tightening torques-34...1410
Counterweight; tightening torques...1412
Counterweight; specifications...1414
Counterweight; description...1415
Counterweight; removing...1417
Counterweight; installing...1420
Undercarriage; description...1423
77 - WHEELS; TRACKS; TYRE; HUB; DRUM...1425
Selection of track shoes...1426
Idler; description...1428
Idler; measurement of wear...1430
Front idler; replacing one...1433
Idler; disassembly...1436
Idler; assembly...1440
Tools & equipment...1443
Sprocket; measurement of wear...1448
Sprocket; replacing one...1451
Track chain; description...1453
Track; adjusting track sag_{03-55}...1455
Track; adjusting track sag_{03-29}...1459
Track chain; measurement of wear...1461
Track shoe; replacing one...1466
Track links; replacing...1470
Track chain assembly; removing...1475
Track chain assembly; installing...1479
Top roller; description...1482
Top roller; measurement of wear...1484
Top roller; replacing one...1487
Bottom roller; description...1492
Bottom roller; measurement of wear...1494
Bottom roller; replacing one...1497
Bottom roller; replacing seal...1502
Track guards...1507
Spring package; assembly dimension...1509
Track recoil spring (tensioner) assembly; replacing...1511
Spring package; disassembling_{52-00}...1514
Spring package; disassembly_{51-35}...1517
Spring package; assembly...1520
8 - MACHINERY HOUSE; CAB; EXTERIOR TRIM PARTS ANYWHERE...1523
80 - GENERAL...1524
VCADS Pro; Operations...1525
81 - CAB; NAKED; CANOPY...1527
Cab; weight...1528
Cab; removing...1529
Cab; installing...1539
Cab suspension; description...1548
83 - DOORS; HATCH; COVER PLATE; (all)...1551
Door; replacing...1552
84 - TRIM PART; OUTSIDE; GLASS; SEALING MOULDING...1556
Windows; general...1557
Windscreen; replacing...1560
Side window; replacing...1574
Rear window; replacing...1581
Door window; replacing...1587
85 - CAB INTERIOR; UPHOLSTERY...1590
Seat; replacing_{38-25}...1591
Seat; replacing_{38-00}...1598
Seat cushion; replacing...1601
Seat support; replacing...1607
Longitudinal adjustment cable; replacing...1614
Longitudinal suspension cable; replacing...1621
Backrest; replacing...1626
Driver's seat; description...1631
Driver's seat; specifications...1636
Seat heater; checking...1640
86 - PROTECTIVE EQUIPMENT...1644
Falling object protection structure (FOPS); description...1645
87 - AIR CONDITIONING UNIT...1647
Air conditioning unit; specifications...1648
Air conditioning unit; description...1650
Performance test; AC unit...1656
Air conditioning unit; maintenance...1662
ECC MID 146 pre-programmed ECU; replacing...1665
ECC MID 146 non-programmed ECU; replacing...1669
Cab filter; replacing-44...1673
Cab filter; replacing...1676
Heating system; description...1680
Fan motor; replacing...1682
Heater core; replacing...1686
Cooler and Heater assembly; replacing...1693
Compressor; replacing incl draining and filling...1701
Receiver; replacing incl draining and filling...1706
Condenser; replacing incl draining and filling...1711
Evaporator; replacing incl draining and filling...1715
Expansion valve; replacing incl draining and filling...1724
Vent actuator; replacing...1732
Mode (foot) actuator; replacing...1735
Intake actuator; replacing...1738
Air mix door actuator; replacing...1741
Compressor; replacing magnetic clutch (compressor removed)...1744
88 - INTERIOR EQUIPMENT...1750
Instrument panel (left); replacing...1751
Instrument panel (right); replacing...1756
9 - HYDRAULIC SYSTEM; DIGGING_HANDLING_GRADING EQUIPMENT; MISCELLANEOUS...1760
90 - GENERAL...1761
Hydraulic diagram; standard - Image...1762
Hydraulic diagram; with option components - Image...1763
Explanations to hydraulic diagram...1764
Hydraulic diagram; standard...1775
Hydraulic diagram; with option components...1778
Hydraulic system; position of main components...1782
Hydraulic system; cleanliness when handling hydraulic components...1785
Description; general...1789
Hydraulic system; description...1790
Hydraulic oil; description...1794
Recommended hydraulic oil; specifications...1798
Hydraulic pressure; specifications...1802
Hydraulic system; repair of hydraulic components in workshop...1803
Hydraulic oil; storage and handling...1808
Hydraulic components; storing and transporting...1812
91 - WORKING HYDRAULIC; SERVO HYDRAULICS...1816
Hydraulic system; work instructions...1821
Hydraulic components; description...1826
Hydraulic tank; specifications...1828
Hydraulic tank; description...1829
Hydraulic oil tank; vacuum-pumping; connecting and disconnecting pump...1833
Oil level gauge; replacing...1836
Breather; replacing...1838
Servo hydraulic selector valve; specifications...1840
Servo hydraulic selector valve; description...1841
Shuttle valve block; description...1843
Check valve; description...1845
Oil cooler line bypass valve (check valve); replacing...1848
Hydraulic oil cooling system; specifications...1855
Hydraulic oil cooling system; description...1856
Hydraulic oil cooler; description...1858
Main control valve; specifications...1860
Main control valve; description...1862
Pressure relief valve; troubleshooting...1866
Main control valve troubleshooting...1870
General; tools...1873
Main spool; disassembly and assembly...1877
Main relief valve; description...1880
Main relief valve; adjustment...1884
Main relief valve; disassembly and assembly...1886
Main pressure relief valve; replacing...1888
Port relief valve; description_{51-13}...1890
Port relief valve; description_{50-48}...1893
Port relief valve pressure; measurement...1896
Port relief valve; adjustment...1899
Port relief valve; disassembly and assembly_{49-09}...1902
Port relief valve; disassembly and assembly_{48-44}...1904
2 stage port relief valve; description...1906
2 stage port relief valve; adjustment...1909
Boom holding valve; description...1911
Boom holding valve; disassembly and assembly...1915
Boom regenerating valve; description...1918
Boom back pressure check valve; disassembly and assembly...1920
Arm holding valve; description...1921
Arm holding valve; disassembly and assembly...1925
Arm regenerating valve; description...1927
Arm regenerating and arm conflux check valve; disassembly and assembly...1931
Arm parallel conflux valve; disassembly and assembly...1934
Arm parallel conflux check valve; disassembly and assembly...1936
Logic valve; description...1937
Logic valve; disassembly and assembly...1940
Load check valve; disassembly and assembly...1942
Straight travel changeover valve; disassembly and assembly...1944
Foot relief valve (flow sensing valve); description...1946
Flow sensing valve; disassembly and assembly...1949
Center bypass valve; disassembly and assembly...1951
Load check valve – single; disassembly and assembly...1953
Tightening Torques...1955
Line rupture valve (boom); specifications...1959
Line rupture valve (boom); description...1960
Line rupture valve relief pressure; adjustment...1965
Line rupture valve pressure; checking and adjusting...1967
Line rupture valve (boom); air breathing...1970
Boom cylinder; rupture valve; replacing...1972
Line rupture valve (boom); disassembly...1975
Line rupture valve (boom); assembly...1978
Line rupture valve (boom); troubleshooting...1981
Line rupture valve (arm); specifications...1984
Line rupture valve (arm); description...1985
Line rupture valve (arm); air breathing...1987
Dipper arm cylinder; rupture valve; replacing...1989
Line rupture valve (arm); disassembly...1993
Line rupture valve (arm); assembly...1996
Line rupture valve (arm); troubleshooting...1999
Hydraulic pump; specifications...2001
Hydraulic pump; description...2002
Hydraulic pump; maintenance standard; Specifications...2008
Pump; troubleshooting...2012
Pump; tools...2017
Pump; disassembly...2019
Pump; assembly...2025
Pump; installation...2031
Regulator; description...2033
Regulator; maintenance...2040
Regulator; disassembly and assembly...2043
Regulator; disassembly...2053
Regulator; assembly...2060
Proportional solenoid valve; specifications ...2065
Current_pressure; specifications...2066
Proportional solenoid valve; description ...2067
Proportional solenoid valve; measuring and adjustment...2071
Proportional solenoid valve; troubleshooting...2074
Hydraulic pump (removed); changing shaft seal...2077
Hydraulic pump; replacing...2079
Hydraulic pump regulator; replacing...2097
Proportional solenoid valve (power shift); replacing...2101
Servo pump; specifications...2105
Servo pump; description...2106
Servo pump; parts inspection...2109
Servo hydraulic pressure; adjustment...2112
Servo pump; replacing...2114
Single stage gear pump; replacing...2117
Pressure accumulator; specifications...2123
Pressure accumulator; description...2124
Accumulator; replacing...2126
Tightening torques-...2128
Remote control valve (Lever); specifications...2132
Remote control valve (Lever); description...2134
Remote control valve (Lever); maintenance standard; Specifications...2144
Remote control valve (lever); replacing...2147
Remote control valve (Lever); disassembly...2159
Remote control valve (Lever); assembly...2172
Remote control valve (Lever); troubleshooting...2185
Remote control valve (pedal); specifications...2188
Remote control valve (pedal); description...2189
Remote control valve (pedal); maintenance standard; Specifications...2197
Remote control valve (pedal); replacing...2200
Remote control valve (pedal); disassembly...2205
Remote control valve (pedal); assembly...2215
Remote control valve (pedal); troubleshooting...2227
Solenoid valve; specifications ...2230
Solenoid valve; description ...2231
Solenoid valve; inspection...2234
Solenoid valve; troubleshooting...2237
Solenoid valve; replacing...2241
Tightening torques...2243
X1 Line; description...2246
Hammer and shear pedal valve (RCV); replacing...2249
Solenoid valve; specifications...2250
Solenoid valve; description...2252
Hammer and shear selector and shuttle valve; description...2256
3 way selector valve; specifications...2258
3 way selector valve; description...2259
Proportional solenoid valve; specifications...2261
Proportional solenoid valve; description...2264
Stop valve...2267
Solenoid valve for rotator...2269
Rotator pump; specifications...2271
Rotator pump; description...2273
Rotator pump; disassembly...2277
Rotator pump; assembly...2280
Rotator pump; parts inspection...2283
Rotator (X3 Line option); description...2285
Rotator valve; adjustment...2290
Boom float position; description...2293
92 - MECHANICAL EQUIPMENT_ATTACHMENT...2296
Attachment quick coupler; description_{45-56}...2297
Attachment quick coupler; description_{45-25}...2310
Attachment quick coupler; operation...2321
Attachment quick coupler; replacing_{44-12}...2324
Attachment quick coupler; replacing_{43-47}...2333
Attachment quick coupler; adjustment...2343
Attachment quick coupler solenoid valve; description_{42-45}...2347
Attachment quick coupler solenoid valve; description_{42-20}...2352
97 - UNIT; DIGGING...2355
Tightening torques...2356
Function description...2364
Digging unit; maintenance...2367
Cylinder; description...2371
Cylinder; disassembly and assembly_{39-03}...2376
Cylinder; disassembly and assembly_{38-38}...2395
Cylinder; troubleshooting...2411
Boom; specifications...2415
Boom; description...2416
Boom; replacing...2419
Boom cylinder; specifications...2438
Lower boom cylinder bushing; replacing...2440
Upper boom cylinder bushing; replacing...2449
Dipper arm; specifications...2453
Dipper arm; description...2454
Dipper arm; replacing...2457
Link; description...2470
Dipper arm connecting rod; replacing...2473
Connecting rod yoke; replacing...2480
Dipper arm cylinder; specifications...2489
Dipper arm cylinder; description...2491
Dipper arm cylinder; replacing...2493
Dipper arm cylinder bushing on boom; replacing...2503
Dipper arm cylinder bushing on dipper arm; replacing...2508
Bucket cylinder; specifications...2512
Bucket cylinder; description...2513
Bucket cylinder; replacing...2515
Bucket cylinder bushing on dipper arm; replacing...2526
Volvo EC120D Excavators Service Repair Manual
