Caterpillar Wheel Loaders 988K Repair Service Manual
Complete service repair manual with Electrical Wiring Diagrams for Caterpillar Wheel Loaders 988K, with all the technical information to maintain, diagnose, repair, and rebuild like professional mechanics.
Caterpillar Wheel Loaders 988K 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.
KENR6486 - Disassembly and Assembly (836K Landfill Compactor; 834K Wheel Dozer and 988K Wheel Loader C18 Engine Supplement).pdf
KENR6487 - Specifications (988K Wheel Loader Systems).pdf
KENR6488 - Systems Operation (988K Wheel Loader).pdf
KENR6488 - Testing and Adjusting (988K Wheel Loader).pdf
KENR6490 - Disassembly and Assembly (836K Landfill Compactor; 834K Wheel Dozer and 988K Wheel Loader Power Train).pdf
KENR6720 - Disassembly and Assembly (988K Wheel Loader; 834K Wheel Dozer and 836K Compactor Machine Systems).pdf
RENR5397 - Specifications (988H; 988K; 990H; 990K; 992G; 992K; 993K; and 994K Wheel Loaders; and 854K Wheel Dozers Automatic Lubrication System (Hydraulic Actuated System).pdf
RENR5397 - Systems Operation (988H; 988K; 990H; 990K; 992G; 992K; 993K; and 994K Wheel Loaders; and 854K Wheel Dozers Automatic Lubrication System (Hydraulic Actuated System).pdf
RENR5397 - Testing and Adjusting (988H; 988K; 990H; 990K; 992G; 992K; 993K; and 994K Wheel Loaders; and 854K Wheel Dozers Automatic Lubrication System (Hydraulic Actuated System).pdf
UENR3228 - Schematic (988K Wheel Loader Hydraulic System).pdf
UENR3875 - Schematic (988K Wheel Loader Electrical System).pdf
UENR7640 - Schematic (988K Wheel Loader (Steel Mill Option) Electrical System).pdf
PRODUCT DETAILS:
Total Pages: 2,211 pages
File Format: PDF (Internal Links, Bookmarked, Table of Contents, Searchable, Printable, high quality)
Language: English
TABLE OF CONTENTS
KENR6486 - Disassembly and Assembly (836K Landfill Compactor; 834K Wheel Dozer and 988K Wheel Loader C18 Engine Supplement)....1
Steering Frame Lock - Separate and Connect....4
System Pressure - Release....10
Hood - Remove and Install....14
Radiator Cover - Remove and Install....16
Belt Tensioner - Remove and Install....17
Alternator - Remove and Install....19
Electric Starting Motor - Remove and Install....22
Fuel Cooler - Remove and Install....26
Fuel Manifold (ARD) - Remove and Install....28
Fuel Filter Base - Remove and Install - Primary....31
Fuel Filter Base - Remove and Install - Secondary....32
Fuel Tank - Remove and Install....33
Fuel Transfer Pump - Remove and Install....43
Air Control Valve - Remove and Install....44
Pressure Sensor (ARD Combustion Air) - Remove and Install....46
Exhaust Cooler (NRS) - Remove and Install....47
Water Temperature Regulator - Remove and Install....50
Water Pump - Remove and Install....53
Vibration Damper and Pulley - Remove and Install....55
Crankshaft Front Seal and Wear Sleeve - Remove and Install....58
Radiator Core - Remove and Install....61
Fan Blade (Spider) - Remove and Install....63
Hydraulic Oil Cooler - Remove and Install....65
Transmission Oil Cooler - Remove and Install....70
Steering Frame Lock - Separate and Connect 01_10_2017....106
Engine Oil Cooler - Remove and Install....116
Turbocharger - Remove and Install....117
Exhaust Gas Valve (NRS) - Remove and Install....121
Exhaust Elbow - Remove and Install....123
Clean Emissions Module - Remove and Install....127
Ignition Coil - Remove and Install....134
Combustion Head - Remove and Install....135
Relay (ARD Nozzle Heater) - Remove and Install....140
Nozzle Heater Harness - Remove and Install....141
Voltage Control (Load Protection) - Remove and Install....144
Solenoid Valve (ARD Main Fuel) - Remove and Install....146
Electronic Control (Diesel Exhaust Fluid) - Remove and Install....148
DEF Injector and Mounting - Remove and Install....150
Diesel Exhaust Fluid Pump - Remove and Install....152
Diesel Exhaust Fluid Filter - Remove and Install....157
Diesel Exhaust Fluid Module - Remove and Install....159
Diesel Exhaust Fluid Module - Disassemble....163
Diesel Exhaust Fluid Module - Assemble....168
Solenoid Valve (DEF Heater Coolant) - Remove and Install....173
Manifold (DEF Heater) - Remove and Install....175
Diesel Particulate Filter - Remove and Install....178
Inlet Module (Catalyst) - Remove and Install....182
Temperature Sensor (Catalyst Inlet) - Remove and Install....186
Catalyst (SCR) - Remove and Install....188
Nitrogen Oxide Sensor - Remove and Install....192
Soot Sensor - Remove and Install....194
Pressure Sensor (DPF) - Remove and Install....196
Temperature Sensor (DPF Inlet; Flame Detect) - Remove and Install....198
Aftercooler - Remove and Install....200
Air Cleaner - Remove and Install....204
Muffler and Mounting - Remove and Install....206
Muffler - Remove and Install....208
Refrigerant Compressor - Remove and Install....210
Refrigerant Condenser - Remove and Install....214
Valve Cover - Remove and Install....216
Engine - Remove and Install....219
KENR6487 - Specifications (988K Wheel Loader Systems)....229
Hydraulic Tank and Mounting....233
Hydraulic Tank....234
Temperature Sensor (Implement; Hydraulic Fan Oil) (Steering; Brake Oil)....236
Hydraulic Accumulator....238
Accumulator (Pilot)....239
Piston Pump (Implement)....240
Pump Control Valve (Implement)....246
Gear Pump (Pilot)....248
Oil Filter (Hydraulic) - Accumulator....252
Oil Filter (Case Drain)....253
Oil Filter (Implement Pilot) (Implement Pump Case Drain)....254
Electrohydraulic Control - Support....255
Electrohydraulic Control....257
Electrohydraulic Control (Joystick)....259
Solenoid Valve....261
Pilot Control Actuator (Proportional Solenoid)....262
Main Control Valve....264
Main Control Valve - Two Function....268
Control Valve (Lift)....271
Relief Valve (Pilot)....273
Relief Valve....274
Pressure Reducing Valve....275
Pressure Reducing Valve (Pilot Oil)....277
Ride Control Valve....278
Solenoid Valve (Ride Control)....283
Lift Cylinder....285
Lift Cylinder - Mounting....295
Tilt Cylinder....296
Tilt Cylinder - Mounting....302
Bucket Control....303
Pressure Sensor....306
Hydraulic Oil Cooler....307
Solenoid Valve (Quick Coupler)....310
Fan Reversing Valve....311
Piston Pump (Hydraulic Fan) - Demand....313
Fan Drive Motor....317
Oil Filter (Hydraulic Fan)....319
Torque Converter....321
Relief Valve (Torque Converter Outlet)....326
Relief Valve (Torque Converter Inlet)....328
Modulating Valve (Torque Converter Impeller Clutch)....329
Modulating Valve (Torque Converter Lockup Clutch)....331
Pressure Sensor (Torque Converter Impeller Clutch Oil)....335
Temperature Sensor (Axle Oil) (Transmission Sump Oil)....336
STIC Control....337
Transmission Hydraulic Control....343
Relief Valve (Transmission Hydraulic Control)....347
Modulating Valve (Transmission Hydraulic Control)....349
Modulating Valve (Transmission)....351
Modulating Valve (Transmission Clutch)....352
Modulating Valve - Torque Convertor Lockup Clutch....354
Oil Filter (Transmission)....356
Transmission Planetary....358
Transmission Case....366
Input Transfer Gears....367
Output Transfer Gears....371
Speed Sensor (Transmission Output)....375
Gear Pump (Power Train)....376
Power Train Oil Lines....377
Input Drive Shaft....379
Drive Shaft....381
Differential....382
Differential and Bevel Gear....383
NoSPIN Differential....385
Fixed Axle (Front)....388
Oscillating Axle (Rear)....389
Axle Mounting....391
Final Drive and Wheel....393
Rim Mounting....395
Axle Oil Cooler Pump and Motor....396
Lines (Axle Oil Cooler)....399
Piston Pump (Steering)....403
Gear Pump....410
Gear Pump (Secondary Steering)....412
Steering Neutralizer Valve....414
Check Valve (Steering Quad)....415
Steering Control Valve....416
Steering Control Support....421
Selector and Pressure Control Valve (Secondary Steering)....427
Pressure Switch....428
Pilot Valve (STIC Steering)....429
Steering Cylinder....430
Steering Cylinder - Mounting....432
Accumulator Charging Valve (Brake)....433
Solenoid Valve (Brake Accumulator Charge)....436
Brake Accumulator....438
Foot Brake Control - Foot Brake Base (Right Hand Pedal)....441
Limit Switch (Stop Light)....442
Service Brake Lines....443
Parking Brake Control....447
Solenoid Valve and Manifold (Parking Brake Control)....450
Pressure Sensor (Parking Brake Oil)....451
Service Brakes....452
Parking Brake....454
Window Wiper Motor....456
Governor Pedal....458
Fuel Tank....459
Water Lines....463
Heater and Air Conditioner Lines....465
Refrigerant Compressor....469
Refrigerant Condenser....473
Pressure Switch (Air Conditioner)....475
Alternator and Regulator....476
Air Cleaner....478
Exhaust Lines....480
Electric Starting Motor....481
Cab....483
Cab - Door Group....486
STIC Lockout Control....488
Flood Lamp....490
Window Wiper and Washer....492
Instrument Panel....494
Magnetic Switch....496
Circuit Breakers....498
Communication Electronic Control Module (Product Link)....499
Antenna....502
Fuel Cooler....503
Bucket....504
KENR6488 - Systems Operation (988K Wheel Loader)....505
General Information (Hydraulic System)....508
Location of Components (Hydraulic System)....510
Electronic Control (Hydraulic System)....528
Hydraulic System....543
Piston Pump (Implement) - Variable Displacement....554
Piston Pump (Brake Charging) (Implement; Steering Pilot)....557
Main Control Valve....563
Manifold Valve (Brake Charging) (Implement; Steering Pilot)....567
Pressure Reducing Valve (Pilot Oil)....569
Relief Valve (Line)....570
Relief Valve (Main)....576
Ride Control System....580
Oil Filter (Hydraulic)....583
Hydraulic Oil Cooler....586
General Information (Fan Hydraulic System)....587
Location of Components (Fan Hydraulic System)....589
Electronic Control (Fan Hydraulic System)....593
Piston Pump (Hydraulic Fan)....601
Piston Motor (Hydraulic Fan)....606
General Information (Power Train System)....608
Location of Components (Power Train System)....610
Electronic Control (Power Train System)....618
Transmission Hydraulic System....638
Torque Converter and Pump Drive Housing....640
Torque Converter (Lockup)....643
Modulating Valve (Torque Converter Impeller Clutch)....652
Modulating Valve (Torque Converter Lockup Clutch)....655
Transmission Oil Pump....657
Oil Filter (Power Train)....660
Transmission Magnetic Screen....662
Transmission Lubrication....663
Transmission Hydraulic Control....666
Modulating Valve (Transmission Clutch)....669
Transmission Hydraulic Control Operation....674
Transmission Planetary - 988K....677
Input Transfer Gears....685
Output Transfer Gears....688
Input Transfer Gear And Output Transfer Gear Lubrication....691
Differential....693
NoSPIN Differential....696
Final Drive and Wheel....705
Axle Oil Cooler....707
Transmission Oil Cooler....711
General Information (Steering System)....712
Location of Components (Steering System)....715
Electronic Control (Steering System)....727
Pilot Valve (STIC Steering)....736
Steering Neutralizer Valve....740
Steering Control....742
Steering Control Valve....745
Piston Pump (Steering)....747
Secondary Steering System....748
Gear Pump (Secondary Steering)....752
General Information (Brake System)....755
Location of Components (Brake System)....759
Electronic Control (Brake System)....773
Monitoring System (Brake Functions)....784
Brake Accumulator....786
Accumulator Charging Valve (Brake)....788
Brake Control Valve (Service)....790
Brake Control Valve (Parking)....797
Service Brakes....799
Parking Brake....801
General Information (HVAC System)....804
Location of Components (HVAC System)....806
Electronic Control (HVAC System)....819
Graphic Color Codes....831
KENR6488 - Testing and Adjusting (988K Wheel Loader)....833
Calibrations (Cat ET)....835
Tests (Cat ET)....839
Calibrations (Operator Monitor)....842
Calibration Error Codes....843
Position Sensor (Lift Linkage) - Replace....856
Position Sensor (Tilt Linkage) - Replace....858
System Pressure - Release....860
Pressure Tap Locations....862
Pilot Oil Accumulator - Test and Charge....870
Lift and Tilt Cylinder Drift - Check....872
Lift Cylinder - Isolation and Drift Check....875
Tilt Cylinder - Isolation and Drift Check....880
Ride Control Valve - Isolation and Drift Check....884
Hydraulic Oil Contamination - Test....888
Pressure Reducing Valve Pressure for Dead Engine Pilot Supply (Engine OFF) - Test and Adjust....892
Pilot Pressure - Check....897
Pilot Control Actuator Pressure - Check....901
Ride Control Activation Speed (Electronic Technician) - Adjust....904
Implement Cycle Time - Check....908
Ride Control Accumulator - Test and Charge....910
Piston Pump Cutoff Pressure (Brake Charging) (Implement; Steering Pilot) - Test and Adjust....918
Piston Pump Cutoff Pressure (Hydraulic Fan) - Test and Adjust....923
Relief Valve (Main) - Test and Adjust....928
Torque Converter Impeller Clutch Pressure - Test....933
Torque Converter Stall (1FWD) - Test....938
Torque Converter Stall (3FWD) - Test....940
Torque Converter Lockup Clutch Pressure - Test....942
Torque Converter Pump Drive - Adjust....948
Transmission Pressures - Test and Adjust....949
Input Transfer Gears - Adjust....962
Output Transfer Gears - Adjust....965
Differential Backlash and Bearings - Adjust....968
Differential Pinion Preload - Adjust....974
Wheel Bearings - Adjust....979
Steering System Pressure (High Pressure Stall) - Test and Adjust....982
Piston Pump (Steering) Margin Pressure - Test and Adjust....992
Relief Valve (Pump Backup) - Test and Adjust....998
Relief Valve (Pilot) (Secondary Steering) - Test and Adjust - If Equipped....1003
STIC Control (Steering Deadband) - Adjust....1007
Steering Neutralizer Valve - Check and Adjust....1010
Steering Turn Stop - Adjust....1014
Steering Time - Check and Adjust....1017
Articulated Hitch - Adjust....1020
Brake System Air - Purge....1029
Service Brake System Pressure - Test....1032
Brake Accumulator - Test and Charge....1036
Service Brakes - Test....1041
Service Brake Discs - Check....1043
Limit Switch (Stop Light) - Adjust....1048
Limit Switch (Throttle Lock Deactivation) (Electronic Technician) - Adjust....1051
Parking Brake System Pressure - Test....1057
Parking Brake - Manual Release....1061
Parking Brake - Test....1064
Glossary of Terms....1066
KENR6490 - Disassembly and Assembly (836K Landfill Compactor; 834K Wheel Dozer and 988K Wheel Loader Power Train)....1072
Steering Frame Lock - Separate and Connect....1075
System Pressure - Release....1081
Crankcase Guard - Remove and Install....1085
Crankcase Guard - Remove and Install - Front....1089
Power Train Guard (Transmission) - Remove and Install....1096
Bottom Guards (Front) - Remove and Install....1100
Power Train Oil Filter Bypass Valve - Remove and Install....1107
Input Drive Shaft - Remove and Install....1109
Torque Converter - Remove and Install....1113
Torque Converter (Lockup) - Disassemble....1117
Torque Converter (Lockup) - Assemble....1142
Modulating Valve (Torque Converter Lockup Clutch) - Remove and Install....1170
Transmission - Remove and Install....1174
Transmission Oil Pump - Remove and Install....1187
Transmission Oil Pump - Disassemble....1189
Transmission Oil Pump - Assemble....1198
Transmission Oil and Scavenge Pump - Remove and Install....1209
Modulating Valve (Transmission Clutch) - Remove and Install....1212
Modulating Valve (Transmission Clutch) - Disassemble....1214
Modulating Valve (Transmission Clutch) - Assemble....1216
Relief Valve (Transmission Hydraulic Control) - Remove and Install....1218
Relief Valve (Transmission Hydraulic Control) - Disassemble....1219
Relief Valve (Transmission Hydraulic Control) - Assemble....1222
Transmission Oil Cooler - Remove and Install....1226
Transmission from Input Transfer Gears and Output Transfer Gears - Separate....1229
Input Transfer Gears - Disassemble....1235
Input Transfer Gears - Assemble....1242
Transmission Planetary - Disassemble....1250
Transmission Planetary - Assemble....1304
Output Transfer Gears - Disassemble....1352
Output Transfer Gears - Assemble....1367
Transmission to Input Transfer Gears and Output Transfer Gears - Connect....1381
Parking Brake - Remove and Install....1387
Parking Brake - Disassemble....1393
Parking Brake - Assemble....1396
Drive Shaft (Front) and Drive Shaft Support Bearing - Remove and Install....1401
Drive Shaft (Center) - Remove and Install....1405
Drive Shaft (Rear) - Remove and Install....1409
Tire and Rim (Front) - Remove and Install....1413
Tire and Rim (Rear) - Remove and Install....1417
Compactor Wheel - Remove and Install - Front....1421
Compactor Wheel - Remove and Install - Rear....1424
Axle Guard - Remove and Install....1427
Axle Shaft - Remove and Install....1434
Final Drive; Brake; Wheel; and Spindle - Remove....1440
Service Brake - Remove and Install....1443
Final Drive and Wheel - Remove and Install - Rear....1449
Final Drive and Wheel - Remove and Install - Front....1458
Duo-Cone Seals - Assemble....1467
Final Drive Planetary - Remove and Install....1479
Final Drive (Planetary) - Disassemble....1481
Final Drive (Planetary) - Assemble....1483
Final Drive; Brake; Wheel; and Spindle - Install....1485
Fixed Axle (Front) - Remove and Install....1488
Oscillating Axle (Rear) - Remove and Install....1494
Trunnion Support (Oscillating Axle; Front) - Remove and Install....1497
Trunnion Support (Oscillating Axle; Front) - Disassemble....1499
Trunnion Support (Oscillating Axle; Front) - Assemble....1501
Trunnion Support (Oscillating Axle; Rear) - Remove and Install....1503
Trunnion Support (Oscillating Axle; Rear) - Disassemble....1512
Trunnion Support (Oscillating Axle; Rear) - Assemble....1513
Differential and Bevel Gear - Remove and Install - Rear....1515
Differential and Bevel Gear - Disassemble....1521
Differential and Bevel Gear - Assemble....1533
NoSPIN Differential - Disassemble....1553
NoSPIN Differential - Assemble....1557
Axle Oil Cooler - Remove and Install....1562
Axle Oil Cooler Pump and Motor - Remove and Install....1564
Axle Oil Cooler Pump and Motor - Disassemble....1566
Axle Oil Cooler Pump and Motor - Assemble....1577
Gear Pump (Axle Oil Cooler) - Remove and Install....1587
KENR6720 - Disassembly and Assembly (988K Wheel Loader; 834K Wheel Dozer and 836K Compactor Machine Systems)....1589
Steering Frame Lock - Separate and Connect....1592
System Pressure - Release....1598
Hydraulic Tank - Remove and Install....1602
Hydraulic Tank - Disassemble....1608
Hydraulic Tank - Assemble....1614
Piston Pump (Steering) - Remove and Install....1621
Piston Pump (Steering) - Disassemble....1624
Piston Pump (Steering) - Assemble....1642
Gear Pump (Secondary Steering) - Remove and Install....1662
Gear Pump (Secondary Steering) - Disassemble....1669
Gear Pump (Secondary Steering) - Assemble....1675
Selector and Pressure Control Valve (Secondary Steering) - Remove and Install....1681
Monitor - Remove and Install....1684
STIC Control and Pilot Valve (Steering) - Remove and Install....1685
Steering Neutralizer Valve - Remove and Install....1691
Steering Neutralizer Valve - Disassemble....1692
Steering Neutralizer Valve - Assemble....1694
Steering Control Valve - Remove and Install....1696
Steering Control Valve - Disassemble....1700
Steering Control Valve - Assemble....1709
Steering Cylinder - Remove and Install....1718
Brake Accumulator - Remove and Install....1722
Accumulator Charging Valve (Brake) - Remove and Install....1724
Brake Control Valve (Service) - Remove and Install....1726
Brake Control Valve (Parking) - Remove and Install....1727
Parking Brake - Remove and Install....1729
Parking Brake - Disassemble....1732
Parking Brake - Assemble....1735
Piston Pump (Brake) - Remove and Install....1740
Piston Pump (Brake) - Disassemble....1743
Piston Pump (Brake) - Assemble....1753
Piston Pump (Implement) - Remove and Install....1767
Piston Pump (Implement) - Disassemble....1770
Piston Pump (Implement) - Assemble....1785
Piston Pump (Hydraulic Fan) - Remove and Install....1806
Piston Pump (Hydraulic Fan) - Disassemble....1809
Piston Pump (Hydraulic Fan) - Assemble....1827
Piston Motor (Hydraulic Fan) - Remove and Install....1849
Piston Motor (Hydraulic Fan) - Disassemble....1853
Piston Motor (Hydraulic Fan) - Assemble....1859
Electrohydraulic Control (Joystick) - Remove and Install....1872
Main Control Valve - Remove and Install - Valve 3....1875
Main Control Valve - Remove and Install - Valve 2....1878
Main Control Valve - Disassemble - Valve 3....1881
Main Control Valve - Disassemble - Valve 2....1891
Main Control Valve - Assemble - Valve 3....1901
Main Control Valve - Assemble - Valve 2....1910
Ride Control Valve - Remove and Install....1920
Ride Control Valve - Disassemble....1922
Ride Control Valve - Assemble....1927
Ride Control Accumulator - Remove and Install....1932
Ride Control Accumulator - Disassemble....1935
Ride Control Accumulator - Assemble....1938
Lift Position Control - Remove and Install....1941
Tilt Position Control - Remove and Install....1943
Bucket - Remove and Install....1946
Bucket Lever and Link - Remove and Install....1949
Boom - Remove and Install....1954
Boom Bearings and Seals - Remove and Install....1959
Lift Cylinder - Remove and Install....1963
Tilt Cylinder - Remove and Install....1970
Window Wiper and Wiper Motor (Front) - Remove and Install....1975
Window Wiper and Wiper Motor (Rear) - Remove and Install....1979
Cab - Remove and Install....1982
Seat - Remove and Install....1987
Evaporator Coil and Heater Coil - Remove and Install....1990
Blower Motor (Air Conditioner; Heater) - Remove and Install....1999
Automatic Lubrication - Remove and Install....2003
Loader Frame from Rear Frame - Separate....2008
Loader Frame to Rear Frame - Connect....2025
Rear Bumper - Remove and Install....2045
Counterweight - Remove and Install....2050
RENR5397 - Specifications (988H; 988K; 990H; 990K; 992G; 992K; 993K; and 994K Wheel Loaders; and 854K Wheel Dozers Automatic Lubrication System (Hydraulic Actuated System)....2053
Lubrication Tank and Pump Group....2054
Limit Switch (Grease Low Level)....2057
Level Sender (Automatic Lubrication Tank)....2059
Lubrication Pump....2062
Pressure Sensor (Automatic Lubrication)....2064
Lubrication Distribution Valve....2068
RENR5397 - Systems Operation (988H; 988K; 990H; 990K; 992G; 992K; 993K; and 994K Wheel Loaders; and 854K Wheel Dozers Automatic Lubrication System (Hydraulic Actuated System)....2081
General Information....2082
Location of Components....2089
Control System....2105
Electrical System....2127
Lubrication System....2133
Lubrication Pump....2135
Lubrication Distribution Valve....2142
Lubrication Injector....2144
RENR5397 - Testing and Adjusting (988H; 988K; 990H; 990K; 992G; 992K; 993K; and 994K Wheel Loaders; and 854K Wheel Dozers Automatic Lubrication System (Hydraulic Actuated System)....2154
Machine Preparation for Troubleshooting....2155
Visual Inspection....2160
Automatic Lubrication System Troubleshooting....2162
System Pressure - Release....2178
Control System - Adjust....2181
Electrical System - Test....2198
Automatic Lubrication System - Test and Adjust....2199
Automatic Lubrication System - Maintenance....2206
Lubrication Injectors - Check and Adjust....2214
UENR3228 - Schematic (988K Wheel Loader Hydraulic System)....2232
Features....2232
Cover Page....2233
Information....0
Component Location....0
Page 1 of 2....2234
Page 2 of 2....2235
Tap Location....2236
Fluid Power Symbols....2237
Electrical Symbols....2238
Schematic....2239
Machine Views....0
Cab - Top View....2240
Cooling - Right View....2241
Machine - Bottom View....2242
Machine - Right Side View....2243
Machine - Top View....2244
UENR3875 - Schematic (988K Wheel Loader Electrical System)....2245
Feature....2245
Cover Page....2246
Information....0
Component Location....0
Volume 1 of 4 - Main Cab....2247
Volume 2 of 4 - Cab....2248
Volume 3 of 4 - Chassis....2249
Volume 4 of 4 - Engine....2250
Connector Location....0
Volume 1 of 4 - Main Cab....2251
Volume 2 of 4 - Cab....2252
Volume 3 of 4 - Chassis....2253
Volume 4 of 4 - Engine....2254
CID/MID/FMI....0
Volume 1 of 4 - Main Cab....2255
Standard Electrical....2256
Schematics....0
Volume 1 of 4 - Main Cab ....2257
Volume 2 of 4 - Cab....2258
Volume 3 of 4 - Chassis....2259
Volume 4 of 4 - Engine....2260
Machine Views....0
Volume 1 of 4 - Main Cab....0
Cab Front View....2261
Cab Rear View....2262
Headliner And Roof View....2263
RH Console View....2264
RH Windshield Pillar View....2265
Volume 2 of 4 - Cab....0
Caes Display ....2266
Cat Detect....2267
Comm Radio....2268
External Caes Components....2269
HVAC Wiring....2270
Remote Condenser....2271
RH And LH Pod....2272
Roof Wiring....2273
Tire Pressure Monitoring....2274
Volume 3 of 4 - Chassis....0
Front Chassis View....2275
Hydraulic Tank Rear View....2276
LH Frame View....2277
Radiator View ....2278
Rear Bumper Wiring....2279
RH Frame view....2280
Torque Converter....2281
Transmission....2282
Volume 4 of 4 - Engine....0
Injectors....2283
Left Side Of Engine....2284
Right Side Of Engine....2285
UENR7640 - Schematic (988K Wheel Loader (Steel Mill Option) Electrical System)....2286
Features....2286
Cover page....2288
Tables....0
Components....2289
Connector....2290
Schematic....2291
Machine Views....0
Machine - Rght Side....2292
Cab - Rear View....2293
Cab - Front View....2294
Caterpillar Wheel Loaders 988K Repair Service Manual
