Complete workshop repair & service manual with electrical wiring diagrams for Caterpillar 943, 953 Wheel Loader. It's the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

Caterpillar 943, 953 Wheel Loader Factory Service & Shop Manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & 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.

RENR3684 - Troubleshooting (953 Track-Type Loader Hydrostatic Power Control Unit)
SENR2077 - Service Information (943 & 953 TRACK-TYPE LOADERS)
SENR2078 - Specifications (943 & 953 TRACK-TYPE LOADERS)
SENR2129 - Testing and Adjusting (943 & 953 TRACK-TYPE LOADERS).pdf
SENR3034 - Schematic (943, 953 and 963 Track Loader Transmission Control Hydraulic System)
SENR3193 - Systems Operation (943, 953, 963, 973 TRACK-TYPE LOADERS POWER TRAIN).pdf
SENR3193 - Testing And Adjusting (943, 953, 963, 973 TRACK-TYPE LOADERS POWER TRAIN).pdf
SENR4215 - Disassembly and Assembly (943 & 953 TRACK-TYPE LOADER POWER TRAIN)
SENR4216 - Disassembly and Assembly (943-953 TRACK-TYPE LOADERS VEHICLE SYSTEMS)
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RENR3684 - Troubleshooting (953 Track-Type Loader Hydrostatic Power Control Unit)...2
  Incorrect Center Pedal Response - Check...3
  Incorrect Steering Pedal Response - Check...5
  Incorrect Transmission Control Lever Response - Check...9
  Lack of Power - Check...13
  Machine Hesitates before Starting to Move or Machine Accelerates Slowly - Check...24
  Machine Moves Slowly at HIGH IDLE - Check...28
  Machine Will Not Move - Check...40
  Machine Will Not Track Straight in FORWARD or in REVERSE - Check...62
  One Track Starts before the Other Track Starts - Check...69
  One Track Stops before the Other Track Stops - Check...72
  Machine Operation - Check...73
  Overheating of Machine Systems - Check...89
  Pressure Surge - Check...104
  Visual Walk-Around Inspection - Check...117
SENR2077 - Service Operation (943 & 953 TRACK-TYPE LOADERS)...120
  Model View...122
  Engine Design...124
  New Scroll Fuel System Systems Operation...126
  Fuel Systems Testing and Adjusting...136
  Fuel System Systems Operation...171
  Fuel System Testing and Adjusting...181
  Air Inlet and Exhaust System Systems Operation...222
  Air Inlet and Exhaust System Testing and Adjusting...227
  Lubrication System Systems Operation...234
  Lubrication System Testing and Adjusting...244
  Cooling System Systems Operation...248
  Cooling System Testing and Adjusting...250
  Basic Block Systems Operation...257
  Basic Block Testing and Adjusting...260
  Troubleshooting Index...268
  Hydrostatic Power Control Unit (HPCU) Systems Operation...278
  Hydrostatic Power Control Unit (HPCU) Testing And Adjusting...324
  Systems Operation...389
  Testing And Adjusting...411
  Troubleshooting Methods...471
  Block Diagram...473
  Codes And Abbreviations...475
  Component And Connector Locations...476
  Location And Identification Of Electrical Components...477
  Electronic Monitoring System...480
  Troubleshooting The Electronic Monitoring System (E.M.S.) Operator Panel...482
  Introduction...503
  Oil Pump...508
  Tank And Valve Group (Standard Two Valve)...511
  Tank And Valve Group (Optional Three Valve)...513
  Lift And Tilt Control Valve...515
  Third Control Valve (Optional)...523
  Relief Valves For Tilt And Attachment (Third) Cylinders...525
  Relief Valve For The Head End Of The Lift Cylinder...528
  Main Relief Valve...529
  Make-Up Valves...531
  Oil Cooler (Optional On 943)...533
  Oil Cooler Supply Valve (Optional On 943)...534
  Oil Filter...535
  Diverter Valve (Optional)...536
  Bucket Control Group...537
  Bucket Positioner Mechanism (Tilt Kickout)...538
  Lift Kickout Mechanism...542
  Tilt Circuit...546
  Lift Circuit...550
  Hydraulic Implement Tank Fill And Air Removal Procedure...554
  Third Circuit...556
  Fourth Circuit (Diverter Valve)...560
  Troubleshooting...562
SENR2078 - Specifications (943 & 953 TRACK-TYPE LOADERS)...570
  Engine Design...574
  Fuel Injection Equipment...575
  Fuel Injection Nozzle...578
  Governor...579
  Governor Control Group (8G7378) - 943; (8G7407) - 953...581
  Fuel Injection...583
  Governor Housing...588
  Injection Nozzle (9N3979 and 1W5829)...590
  Fuel Injection Pump Housing...592
  Fuel Injection Lines...594
  Primary Fuel Filter...596
  Fuel Pump Drive (943 Engine)...597
  Automatic Timing Advance Unit (953 Engine)...599
  Governor (943 Engine)...602
  Governor (953 Engine)...605
  Governor Control Linkage...608
  Timing Gears...610
  Camshaft...614
  Cylinder Head...617
  Valves And Valve Springs...619
  Valve Cover And Base...621
  Valve Seats And Inserts...622
  Valve Rocker Arms And Lifters...625
  Turbocharger (AiResearch T04B65)...627
  Air Cleaner...629
  Air Breather...630
  Exhaust Manifold...631
  Oil Pump...632
  Oil Filter...638
  Oil Pan...639
  Water Temperature Regulator And Water Lines...640
  V-Belt Tension Chart...642
  Cooling System Pressure Cap...643
  Water Pump...644
  Cylinder Block...646
  Pistons And Rings...649
  Connecting Rod...651
  Crankshaft...654
  Bearings For Connecting Rods And Mains...656
  Bearing Surface (Journal) For Connecting Rods...657
  Bearing Surface (Journal) For Main Bearings...659
  Flywheel...661
  Flywheel Housing...663
  Flywheel Housing Runout...664
  Flywheel Housing Bore...666
  Flywheel Runout...669
  3G1803 Hydraulic Pump...671
  1U390 Hydraulic Pump...673
  Hydraulic Pumps (943)...675
  Hydraulic Pumps (953)...676
  Main Control Valve...677
  Track Motors (3G3842 and 4T330)...679
  Track Motors (4T1582)...683
  Pilot-Overspeed Valve...687
  Joint Assembly (3G4605)...689
  Joint Assembly (4T1693)...690
  Governor Control Group...691
  Steering Control Group (8G143)...693
  Speed And Direction Control Group...695
  Speed Override And Brake Control Group...697
  Hydrostatic Transmission Case Group...699
  Track Brakes...707
  Servo Linkage Group...708
  Linkage Group - Transmission...710
  Charge Pressure Relief & Cooler Bypass Valves...712
  Underspeed Override Valve...713
  Charge And Relief Valve...714
  Servo Cylinder Groups...719
  Underspeed Valve...720
  Final Drive...722
  Adjustment Of Sprocket Bearings...726
  Front Idlers And Recoil Springs...728
  Pivot Bar Group...731
  Track Carrier Rollers...732
  Track Rollers...733
  Track Roller Frame...735
  Track...736
  Track Adjustment...738
  Introduction...740
  Refrigerant Compressor...743
  Air Conditioner Group...745
  R-12 Refrigerant...747
  Refrigerant Oil...748
  Torque For Fittings...749
  Alternator...750
  Starter Solenoid...752
  Starter Motor...753
  Engine Coolant Temperature Switch (Ether Aid Shut-Off)...754
  Transmission Oil Temperature Switch...755
  Engine Coolant Temperature Switch...756
  Engine Oil Pressure Switch...757
  Fuel Pressure Switch...758
  943 Hydraulic Pump...760
  953 Hydraulic Pump...762
  Relief Valves For Attachment Cylinder And Head End Of Tilt Cylinder...764
  Relief Valve For Rod End Of Tilt Cylinder...766
  Relief Valve For Main Pressure...768
  Relief Valve For Head End Of Lift Cylinder...769
  Third Control Valve...770
  Lift And Tilt Control Valve...772
  Tank And Valve Groups...775
  Bucket Positioner Adjustment Procedure...779
  Lift Kickout Adjustment Procedure...781
  Diverter Control Group...784
  Attachment Lines Group...786
  Bucket Control Group...787
  Bit; Cutting Edge And Tooth Groups...788
  943 Lift Cylinders...789
  943 Tilt Cylinder...790
  953 Lift Cylinders...791
  953 Tilt Cylinder...792
  Multi-Purpose Bucket Cylinders...793
  Ripper Cylinders...794
  Ripper Mounting Group...795
  Ripper Cylinder Mounting Group...797
SENR2129 - Testing and Adjusting (943 & 953 TRACK-TYPE LOADERS)...799
SENR3034 - Schematic (943; 953 and 963 Track Loader Transmission Control Hydraulic System)...806
  Collage...807
  Main...815
SENR3193 - Systems Operation (943, 953, 963, 973 TRACK-TYPE LOADERS POWER TRAIN)...817
SENR3193 - Testing And Adjusting (943, 953, 963, 973 TRACK-TYPE LOADERS POWER TRAIN)...910
SENR4215 - Disassembly and Assembly (943 & 953 TRACK-TYPE LOADER POWER TRAIN)...974
  Remove Track Carrier Rollers...976
  Remove And Install Sprocket Segments...979
  Separation Of Tracks...980
  Remove Front Idlers And Yokes...985
  Disassemble Front Idlers And Yokes...987
  Assemble Front Idlers And Yokes...992
  Remove Track Roller Frames...998
  Remove Equalizer Bar Supports...1002
  Remove Track Adjusters And Recoil Springs (953)...1009
  Disassemble Track Adjusters...1013
  Remove Equalizer Bar And Pads...1016
  Remove Pump (Track Brake Release)...1023
  Sprocket Segments...1028
  Track Carrier Rollers...1029
  Track Rollers...1039
  Adjustment Of Tracks...1045
  Tracks...1048
  Front Idlers And Yokes...1064
  Track Roller Frames...1075
  Equalizer Bar Supports...1079
  Track Adjusters And Recoil Springs (943)...1086
  Track Adjusters And Recoil Springs (953)...1090
  Track Adjusters...1094
  Equalizer Bar And Pads...1097
  Pivot Shafts...1104
  Final Drives And Sprocket Assemblies...1110
  Pump (Track Brake Release)...1133
  Track Brakes...1138
  Track Motors...1144
  Forward-Reverse Controls...1174
  Steering Controls...1187
  Speed-Brake Control...1195
  Transmission Oil Cooler...1201
  Flexible Coupling...1207
  Hydrostatic Power Control Unit...1209
  Oil Filter Housing...1219
  Charge Pump (Fixed Displacement)...1221
  Synch Shutoff Valve...1227
  Synch Valve...1229
  Charge Pressure Relief Valve...1234
  Oil Cooler Bypass Valve...1236
  Charge And Main Relief Valves...1238
  Pump Head...1245
  Pump Head And Barrel Assemblies...1251
  Servo Cylinders...1257
  Main Control Valve...1265
  Steer Lever Control Assembly...1276
  Pilot-Overspeed Valve...1280
  Underspeed Override Valve...1284
  Underspeed Valve...1288
  Hydrostatic Power Control Unit Linkage (Internal)...1302
  Pump (Axial Piston; Variable Displacement)...1313
  Mechanical Adjustment Of Hydrostatic Power Control Unit Linkage (Internal)...1333
  Brake Bleed Valve...1343
SENR4216 - Disassembly and Assembly (943-953 TRACK-TYPE LOADERS VEHICLE SYSTEMS)...1345
  Servo Valves...1347
  Oil Pan (943)...1351
  Oil Pan (953)...1356
  Pump Drive...1362
  Heater Control Valve...1369
  Heater Core...1372
  Blower Fans And Motors...1375
  Thermostat...1378
  Air Conditioning Expansion Valve...1382
  Air Conditioning Evaporator Coil...1385
  Condenser Fans And Motors...1389
  Air Conditioning Condenser...1391
  Receiver-Dryer...1394
  Air Conditioning Compressor...1397
  Air Conditioning Compressor Clutch And Pulley...1401
  Air Conditioning Compressor Coil...1409
  Air Conditioning Compressor Shaft Seal...1412
  Alternator...1417
  Batteries...1419
  Starter...1421
  Bucket...1424
  Bucket Lever And Link...1428
  Lift Cylinders...1435
  Tilt Cylinder...1447
  Lift Arms...1459
  Lift Arm Bearings...1464
  Hydraulic Control Linkage...1468
  Hydraulic Tank...1475
  Hydraulic Tank (Two Valve)...1482
  Hydraulic Tank (Three Valve)...1505
  Hydraulic Oil Cooler (953)...1514
  Hydraulic Pump...1516
  Hydraulic Implement Fill And Air Removal Procedures...1528
  Cab...1530
  Cab Tilt Cylinder...1552
  Cab Door Latches And Strikers...1554
  Stationary Window Glass...1558
  Sliding Window Glass...1561
  Windshield Wiper Motor And Linkage (Front)...1569
  Windshield Wiper Motors And Linkages (Rear)...1572

Caterpillar 943, 953 Wheel Loader Factory Service & Shop Manual