Caterpillar ARTICULATED TRUCKS 725C Workshop Service Repair manual with Electrical Wiring Diagrams (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnosis & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. The printer-ready PDF documents work like a charm on all kinds of devices.

This manual (1,801 pages PDF) contains high quality images, circuit diagrams, instructions to help you to maintenance, troubleshoot, diagnose, and repair. This document is printable, without restrictions, contains searchable text, bookmarks, crosslinks for easy navigation.

UENR2383 - Disassembly and Assembly (725C Articulated Truck Power Train).pdf
UENR2386 - Disassembly and Assembly (725C Articulated Truck).pdf
UENR2381 - Testing and Adjusting (725C, 725C2, 730C and 730C2 Articulated Truck).pdf
UENR2381 - Systems Operation (725C, 725C2, 730C and 730C2 Articulated Truck).pdf
UENR2345 - Specifications (725C, 725C2, 730C, 730C2 and 730C, 730C2 EJECTOR Articulated Truck Systems).pdf
M78532 - Systems Operation (725C, 725C2, 730C, 730C2, 730C EJECTOR, 730C2 EJECTOR, 735B, 735C, 740B, 740B EJECTOR, 740C, 740C EJECTOR and 745C Articulated Trucks Automatic Lubrication System).pdf
UENR2378 - Disassembly and Assembly (725C Articulated Truck Engine Supplement).pdf
UENR2353 - Systems Operation (725C, 725C2, 730C and 730C2 Articulated Trucks Indication Display_CMPD Monitoring).pdf
UENR2353 - Troubleshooting (725C, 725C2, 730C and 730C2 Articulated Trucks Indication Display_CMPD Monitoring).pdf
M78532 - Testing and Adjusting (725C, 725C2, 730C, 730C2, 730C EJECTOR, 730C2 EJECTOR, 735B, 735C, 740B, 740B EJECTOR, 740C, 740C EJECTOR and 745C Articulated Trucks Automatic Lubrication System).pdf
UENR2353 - Testing and Adjusting (725C, 725C2, 730C and 730C2 Articulated Trucks Indication Display_CMPD Monitoring).pdf
UENR3202 - Schematic (725C and 730C Articulated Truck Hydraulic System).pdf
UENR5440 - Schematic (725C Articulated Truck Electrical System, Cab 446-4869, Chassis 442-8434, Transmission and Additional Chassis Components).pdf
UENR2276 - Troubleshooting (Fast Fuel Fill - Low Pressure System for Certain Machines).pdf
UENR2276 - Systems Operation (Fast Fuel Fill - Low Pressure System for Certain Machines).pdf
UENR2276 - Testing and Adjusting (Fast Fuel Fill - Low Pressure System for Certain Machines).pdf

TABLE OF CONTENTS / FILE LIST:
M78532 - Systems Operation (725C, 725C2, 730C, 730C2, 730C EJECTOR, 730C2 EJECTOR, 735B, 735C, 740B, 740B EJECTOR, 740C, 740C EJECTOR and 745C Articulated Trucks Automatic Lubrication System)....3
  Electrical System....4
  General Information....61
  Lubrication Pump....78
  Lubrication System....84
M78532 - Testing and Adjusting (725C, 725C2, 730C, 730C2, 730C EJECTOR, 730C2 EJECTOR, 735B, 735C, 740B, 740B EJECTOR, 740C, 740C EJECTOR and 745C Articulated Trucks Automatic Lubrication System)....91
  Automatic Lubrication System - Adjust....92
  Automatic Lubrication System - Test....103
  Automatic Lubrication System Troubleshooting....106
  Electrical System - Test....122
  General Information....127
  System Pressure - Release....128
  Visual Inspection....130
UENR2276 - Systems Operation (Fast Fuel Fill - Low Pressure System for Certain Machines)....131
  Fluids Service System....132
  Introduction....140
UENR2276 - Testing and Adjusting (Fast Fuel Fill - Low Pressure System for Certain Machines)....141
  Maintenance - Recommendations....142
  System Pressure - Release....143
UENR2276 - Troubleshooting (Fast Fuel Fill - Low Pressure System for Certain Machines)....144
  Fluids Service System Troubleshooting....145
  General Information....149
  Visual Inspection....150
UENR2345 - Specifications (725C, 725C2, 730C, 730C2 and 730C, 730C2 EJECTOR Articulated Truck Systems)....152
  Air Conditioner Lines....156
  Air Conditioner and Mounting....158
  Axle Housing....162
  Brake Accumulator (Parking)....168
  Brake Accumulator (Service)....171
  Bypass Valve (Transmission Oil Filter)....172
  Cab Door....174
  Cab Lighting....178
  Cab Liner....184
  Cab Panel - Mounting....187
  Cab Visor....188
  Cab Window....189
  Center Axle....191
  Center Suspension Frame....193
  Check Valve (Steering System Return)....195
  Coolant Tank....196
  Differential (Drive Axle)....200
  Differential and Bevel Gear (Center)....201
  Differential and Bevel Gear (Front and Rear)....203
  Drive Shaft....205
  Final Drive and Wheel....206
  Front Axle....208
  Front Drive Shaft....210
  Front Frame - Engine End....211
  Front Frame - Non-Engine End....213
  Front Suspension Frame....218
  Fuel Lines....220
  Fuel Tank....223
  Gear Motor (Hydraulic Fan)....229
  Gear Pump (Differential Lock)....235
  Governor Pedal....236
  Headlights....238
  Hitch Drive Shaft....240
  Hoist Control Valve....241
  Hoist Cylinder....244
  Hood - Engine....248
  Hydraulic Caliper Service Brake....250
  Hydraulic Fan Drive Lines....252
  Hydraulic Tank - Power Train Oil....254
  Hydraulic Tank Mounting....255
  Hydraulic Tank....257
  Lubrication Lines ....263
  Lubrication Lines....265
  Lubrication Pump - Mounting....273
  Main Control Valve....275
  Modulating Valve (Transmission Hydraulic Control)....281
  Modulating Valve....288
  Mud Guard....290
  Oil Filter (Power Train)....292
  Oscillating Hitch....293
  Output Transfer Gear Mounting....296
  Output Transfer Yoke....297
  Parking Brake....298
  Piston Pumps (Brake, Ejector, Steering, Fan)....301
  Piston Pumps (Brake, Hoist, Steering, Fan)....303
  Planetary Carrier (Output Transfer Gear)....305
  Position Sensor (Throttle)....307
  Position Sensor (Transmission Control)....308
  Power Train Cooler Lines....310
  Pressure Control Valve (Transmission Hydraulic Control)....312
  Pressure Reducing Valve (Differential Lock)....314
  Pressure Switch (Oil Filter Bypass)....315
  Pressure Switch (Steering)....316
  Pump Drive....317
  Pump Lines....319
  Radiator Guard - Enclosure....322
  Radiator Guard....324
  Radiator....328
  Rear Axle....330
  Rear Drive Shaft....332
  Rear Equalizer Suspension (Equalizer Arm)....333
  Rear Suspension Frame....335
  Rear View Mirror....337
  Refrigerant Compressor....342
  Relief Valve (Hoist Lower)....345
  Relief Valve (Transmission Hydraulic Control)....347
  Retarder Hydraulic Control Valve....349
  Rim Mounting....352
  Rollover Protective Structure (ROPS) Mounting....353
  Secondary Steering Pump and Electric Motor....360
  Service Brake Control....361
  Service Brake Lines....367
  Solenoid Valve (Brake Accumulator Charge)....371
  Solenoid Valve (Hoist Control)....372
  Solenoid Valve (Hydraulic Fan)....373
  Solenoid and Relief Valve (Output Transfer Gears)....374
  Speed Sensor (Torque Converter Output)....376
  Speed Sensor (Transmission Output)....377
  Steering Column....380
  Steering Control....382
  Steering Cylinder - Mounting....384
  Steering Cylinder....385
  Suction Fan....389
  Suspension Cylinder (Front)....390
  Tailgate Mounting....392
  Temperature Sensor (Rear Axle Oil)....396
  Temperature Sensor (Torque Converter Oil)....398
  Torque Converter....399
  Transfer Gears and Case....402
  Transmission Hydraulic Control Valve....408
  Transmission Mounting....411
  Transmission Planetary....413
  Transmission and Hoist Control....418
  Walkway....422
  Window Guard....427
  Window Wiper and Wiper Motor....428
UENR2353 - Systems Operation (725C, 725C2, 730C and 730C2 Articulated Trucks Indication Display_CMPD Monitoring)....438
  Camera Menu....439
  Data Link....441
  Features....444
  General Information....446
  Indication Display Module....448
  Input Components....455
  Location of Electrical Components....457
  Machine Status Menu....458
  Main Menu....460
  Monitor Display....462
  Operator Menu....468
  Performance Screen....470
  Service Menu....473
  Settings Menu....477
  Totals Menu....484
  Warning Operation....488
UENR2353 - Testing and Adjusting (725C, 725C2, 730C and 730C2 Articulated Trucks Indication Display_CMPD Monitoring)....491
  Connector Contact Description....492
  Electrical Connector - Inspect....494
  Module - Flash Program....503
  Module - Replace....504
  Self Test....506
  System Schematic....507
  Wiring Harness (Open Circuit) - Test....509
  Wiring Harness (Short Circuit) - Test....511
UENR2353 - Troubleshooting (725C, 725C2, 730C and 730C2 Articulated Trucks Indication Display_CMPD Monitoring)....513
  Connector Locations....514
  Diagnostic Capabilities....516
  Diagnostic Code List....520
  Event Code List....521
  General Information....523
  MID 052 - CID 0296 - FMI 09....525
  MID 052 - CID 0296 - FMI 14....530
  MID 052 - CID 0590 - FMI 09....534
  MID 052 - CID 0590 - FMI 14....539
  MID 052 - CID 1273 - FMI 09....542
  MID 052 - CID 1273 - FMI 14....548
  Power Supply Circuit....551
  Service Tools....553
  Switch Circuits....555
  Using Caterpillar Electronic Technician to Determine Diagnostic Codes....558
  Using the Operator Monitor to Determine Diagnostic Codes....561
UENR2378 - Disassembly and Assembly (725C Articulated Truck Engine Supplement)....563
  Aftercooler - Remove and Install....565
  Air Cleaner - Remove and Install....571
  Alternator - Remove and Install....573
  Battery - Remove and Install....574
  Coolant Tank - Remove and Install....576
  Cooling System Package (Radiator, Hydraulic Oil Cooler, Fan) - Remove and Install....580
  Crankcase Guard - Remove and Install....587
  Crankshaft Vibration Damper and Pulley - Remove and Install....589
  Electric Starting Motor - Remove and Install....591
  Engine - Remove and Install....594
  Engine Front Mount - Remove and Install....610
  Engine Oil Cooler - Remove and Install....612
  Engine Oil Filter and Oil Filter Base - Remove and Install....614
  Engine Oil Pan - Remove and Install....615
  Exhaust Extension - Remove and Install....620
  Fuel Filter (Primary) and Fuel Filter Base - Remove and Install....622
  Fuel Filter (Secondary) and Fuel Filter Base - Remove and Install....624
  Gear Motor (Hydraulic Fan) - Assemble....626
  Gear Motor (Hydraulic Fan) - Disassemble....630
  Hood - Remove and Install....634
  Hydraulic Oil Cooler - Remove and Install....637
  Muffler - Remove and Install....639
  Output Transfer Gear Oil Cooler - Remove and Install....640
  Radiator - Remove and Install....641
  Radiator Guard - Remove and Install - Left Side....649
  Refrigerant Accumulator - Remove and Install....650
  Refrigerant Compressor - Remove and Install....653
  Refrigerant Condenser - Remove and Install....656
  Refrigerant Dryer Receiver - Remove and Install....658
  Suction Fan and Gear Motor (Hydraulic Fan) - Remove and Install....661
  System Pressure - Release....666
  Turbocharger - Remove and Install....668
  Water Pump - Remove and Install....671
  Water Temperature Regulator - Remove and Install....674
UENR2381 - Systems Operation (725C, 725C2, 730C and 730C2 Articulated Truck)....676
  Brake Accumulator (Parking)....678
  Brake Accumulator (Service)....680
  Brake Control Valve (Service)....682
  Differential (Center Axle)....685
  Differential (Front and Rear Axle)....687
  Electronic Control (Fan Hydraulic System)....690
  Electronic Control (Hydraulic System)....698
  Final Drive and Wheel....707
  Gear Pump (Transmission)....710
  General Information (Brake System)....711
  General Information (Fan Hydraulic System)....718
  General Information (Hydraulic System)....727
  General Information (Power Train System)....730
  General Information (Steering System)....732
  Graphic Color Codes....735
  Hoist Control Valve....737
  Hoist System....742
  Hydraulic Tank....755
  Interaxle Differential....756
  Location of Components (Brake System)....758
  Location of Components (Fan Hydraulic System)....770
  Location of Components (Hydraulic System)....779
  Location of Components (Power Train System)....786
  Location of Components (Steering System)....794
  Main Control Valve....800
  Metering Pump (HMU)....802
  Modulating Valve (Electronic Clutch Pressure Control)....804
  Modulating Valve (Torque Converter Lockup Clutch)....806
  Oil Cooler (Transmission)....808
  Oil Filter (Transmission)....810
  Parking Brake System....812
  Piston Pump (Hydraulic, Steering, Hoist)....822
  Power Train Electronic Control System....824
  Power Train Hydraulic System....838
  Relief Valve (Transmission Hydraulic Control)....845
  Retarder Hydraulic Control Valve....847
  Retarder....849
  Secondary Steering System....852
  Service Brake....854
  Torque Converter....856
  Transfer Gear Lubrication System....859
  Transfer Gears....862
  Transmission Hydraulic Control....864
  Transmission Planetary....868
UENR2381 - Testing and Adjusting (725C, 725C2, 730C and 730C2 Articulated Truck)....870
  Brake Accumulator (Parking) - Test and Charge....872
  Brake Accumulator (Service) - Test and Charge....879
  Brake Line Pressure for Center and Rear Axle - Test....886
  Brake Line Pressure for Front Axle - Test....888
  Brake System Charging Pressure - Check....890
  Calibration Error Codes....894
  Calibrations (Cat ET)....901
  Differential - Test....906
  Electric Drive Pump (Secondary Steering) - Check....910
  Fan Drive System - Test....913
  Hoist Control Valve - Test....916
  Hydraulic Oil Contamination - Test....919
  Interaxle Differential - Test....921
  Machine Preparation for Testing and Adjusting....925
  Modulating Valve (Electronic Clutch Pressure Control) - Test....927
  Modulating Valve (Torque Converter Lockup Clutch) - Test....930
  Parking Brake Air - Purge....932
  Piston Pump (Brake, Hoist, Fan) - Test and Adjust....935
  Piston Pump (Steering, Hoist) - Test and Adjust....947
  Power Train Pressures....961
  Pressure Reducing Valve (Hoist Pilot Pressure) - Test and Adjust....985
  Pressure Tap Locations....988
  Pump Flow - Test....992
  Release Pressure for Parking Brake - Test....994
  Retarder - Test....996
  Service Brake Air - Purge....1000
  Solenoid Valve (Parking Brake) - Test....1003
  Suspension Height (Front) - Check and Adjust....1005
  Suspension System Troubleshooting....1026
  System Pressure - Release....1028
  Transmission Oil Supply....1029
  Visual Inspection....1035
UENR2383 - Disassembly and Assembly (725C Articulated Truck Power Train)....1037
  Accessory Drive (Transmission) - Remove and Install....1039
  Axle Shaft - Install....1045
  Axle Shaft - Remove....1049
  Center Axle - Remove and Install....1053
  Center Drive Shaft - Remove and Install....1057
  Differential and Bevel Gear (Center) - Assemble....1060
  Differential and Bevel Gear (Center) - Disassemble....1081
  Differential and Bevel Gear (Center) - Remove and Install....1097
  Differential and Bevel Gear (Front and Rear) - Assemble....1100
  Differential and Bevel Gear (Front and Rear) - Disassemble....1119
  Differential and Bevel Gear (Front and Rear) - Remove and Install....1132
  Final Drive - Assemble....1134
  Final Drive - Disassemble....1136
  Final Drive - Remove and Install....1138
  Front Drive Shaft - Remove and Install....1140
  Gear Pump (Output Transfer Gear) - Assemble....1143
  Gear Pump (Output Transfer Gear) - Disassemble....1150
  Gear Pump (Output Transfer Gear) - Remove and Install....1154
  Gear Pump (Transmission Scavenge) - Assemble....1156
  Gear Pump (Transmission Scavenge) - Disassemble....1160
  Gear Pump (Transmission Scavenge) - Remove and Install....1164
  Hitch Drive Shaft - Remove and Install....1166
  Hitch Drive Shaft Bearings - Install....1169
  Hitch Drive Shaft Bearings - Remove....1174
  Idler Gear (Transmission Accessory Drive) - Remove and Install....1179
  Main Drive Shaft - Remove and Install....1181
  Modulating Valve (Transmission Clutch) - Remove and Install....1185
  Oil Cooler (Power Train) - Remove and Install....1187
  Oil Tank (Output Transfer Gear) - Remove and Install....1190
  Output Transfer Gears - Assemble....1192
  Output Transfer Gears - Disassemble....1225
  Output Transfer Gears - Remove and Install....1252
  Pump Drive - Assemble....1257
  Pump Drive - Disassemble....1265
  Pump Drive - Remove and Install....1273
  Rear Axle - Remove and Install....1278
  Rear Drive Shaft - Remove and Install....1282
  Relief Valve (Torque Converter Inlet) - Remove and Install....1286
  Relief Valve (Transmission Hydraulic Control) - Remove and Install....1289
  Relief Valve (Transmission Lubrication) - Remove and Install....1292
  Speed Sensor (Transmission) - Remove and Install....1294
  System Pressure - Release....1299
  Temperature Sensor (Transmission Oil) - Remove and Install....1301
  Torque Converter - Assemble....1303
  Torque Converter - Disassemble....1318
  Torque Converter - Remove and Install....1332
  Transmission - Remove and Install....1337
  Transmission Planetary - Assemble....1346
  Transmission Planetary - Disassemble....1360
  Transmission and Torque Converter Oil Filter - Remove and Install....1374
  Wheel Bearings and Duo-Cone Seals - Install....1378
  Wheel Bearings and Duo-Cone Seals - Remove....1384
UENR2386 - Disassembly and Assembly (725C Articulated Truck)....1389
  Accelerator - Remove and Install....1392
  Brake Accumulator (Parking) - Remove and Install....1395
  Brake Accumulator (Service) - Remove and Install....1396
  Brake Control Valve (Service) - Remove and Install....1402
  Cab - Remove and Install....1410
  Cab Door - Remove and Install....1415
  Center Axle Stabilizer Rod - Remove and Install....1417
  Center Suspension Frame - Install....1421
  Center Suspension Frame - Remove....1425
  Door Handle and Latch - Remove and Install....1430
  Equalizer Arm - Remove and Install....1435
  Fender - Remove and Install....1442
  Front Axle Stabilizer Rod - Remove and Install....1447
  Front Frame and Rear Frame - Connect....1454
  Front Frame and Rear Frame - Separate....1460
  Front Suspension Cylinder - Install....1466
  Front Suspension Cylinder - Remove....1473
  Front Suspension Frame - Install....1480
  Front Suspension Frame - Remove....1485
  Fuel Tank - Remove and Install....1491
  Fuse Panel - Remove and Install....1495
  Heater Assembly - Assemble....1498
  Heater Assembly - Disassemble....1505
  Heater Assembly - Remove and Install....1512
  Hoist Control Valve - Assemble....1519
  Hoist Control Valve - Disassemble....1523
  Hoist Control Valve - Remove and Install....1526
  Hoist Cylinder - Install....1529
  Hoist Cylinder - Remove....1532
  Hydraulic Tank - Remove and Install....1535
  Instrument Panel - Remove and Install....1543
  Main Control Valve - Assemble....1545
  Main Control Valve - Disassemble....1550
  Main Control Valve - Remove and Install....1554
  Metering Pump (Steering) - Remove and Install....1558
  Oscillating Hitch - Install....1562
  Oscillating Hitch - Remove....1568
  Piston Pump (Brake, Fan, Hoist) - Assemble....1575
  Piston Pump (Brake, Fan, Hoist) - Disassemble....1586
  Piston Pump (Brake, Fan, Hoist) - Remove and Install....1595
  Piston Pump (Hoist, Steering) - Assemble....1598
  Piston Pump (Hoist, Steering) - Disassemble....1609
  Piston Pump (Hoist, Steering) - Remove and Install....1618
  Pump Control Valve (Brake) - Remove and Install....1620
  Pump Control Valve (Steering) - Remove and Install....1623
  Rear Axle Stabilizer Rod - Remove and Install....1626
  Rear Suspension Frame - Install....1630
  Rear Suspension Frame - Remove....1635
  Seat - Remove and Install....1640
  Seat Support - Remove and Install....1642
  Secondary Steering Pump and Electric Motor - Assemble....1644
  Secondary Steering Pump and Electric Motor - Disassemble....1651
  Secondary Steering Pump and Electric Motor - Remove and Install....1658
  Sensor - Remove and Install - Payload....1660
  Service Brake - Assemble....1663
  Service Brake - Disassemble....1668
  Service Brake - Remove and Install....1672
  Steering Column - Assemble....1674
  Steering Column - Disassemble....1678
  Steering Column - Remove and Install....1683
  Steering Cylinder - Remove and Install....1688
  System Pressure - Release....1702
  Tailgate (Scissors) - Remove and Install....1704
  Transmission and Hoist Control - Remove and Install....1709
  Truck Body - Remove and Install....1713
  Window Guard - Remove and Install....1716
  Window Wiper and Wiper Motor (Front) - Remove and Install....1720
  Window Wiper and Wiper Motor (Rear) - Remove and Install....1724
UENR3202 - Schematic (725C and 730C Articulated Truck Hydraulic System)....1734
  Features....1734
  Cover page....1736
  Information....0
    Components....1737
    Tap....1738
  Schematic....1739
  Machine Views....0
    Steering Components....1740
    Rear Frame Components....1741
    Main Control Valve....1742
    Hydraulic Tank....1743
    Front Frame Components....1744
    Cylinders....1745
    Below Cab Components....1746
    ATAAC Fan....1747
UENR5440 - Schematic (725C Articulated Truck Electrical System, Cab 446-4869, Chassis 442-8434, Transmission and Additional Chassis Components)....1748
  Collage....1749
  Main....1809

Caterpillar 725C ARTICULATED TRUCKS Workshop Service Repair Manual