Caterpillar Backhoe Loaders 422F2, 427F2, 428F2, 432F2, 434F2 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 (1,312 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.

UENR3749 - Disassembly and Assembly (422F2; 427F2; 428F2; 432F2; 434F2 and 444F2 Backhoe Loaders Machine Systems).pdf
UENR3750 - Schematic (416F2; 422F2; 428F2 and 434F2 Backhoe Loader Electrical System; Cab; Engine and Chassis (LYA1-374 LYK1-327 LYG1-1811 LYF1-801 LBF1-2291).pdf
UENR5026 - Disassembly and Assembly (415F2; 416F2; 420F2 IT; 420F2 ST; 430F2 IT and 430F2 ST Backhoe Loaders Machine Systems).pdf
UENR5153 - Schematic (416F2; 422F2; 428F2 and 434F2 Backhoe Loader Electrical System; Cab Wiring; Engine & Chassis Wiring (LYF802-UP LYG1812-UP LYK328-UP LBF2292-UP LYA375-UP).pdf
UENR5153 - Schematic (422F2; 427F2; 428F2 and 434F2 Backhoe Loader Hydraulic System).pdf
UENR6152 - Disassembly and Assembly (416F2; 420F2 IT; 420F2 ST; 422F2; 428F2; 430F2 IT; 430F2 ST; 432F2; 434F2 and 444F2 Backhoe Loaders Engine Supplement).pdf
UENR3742 - Specifications (422F2; 427F2; 428F2; 432F2 and 434F2 Backhoe Loaders Transmission (Standard Shift)).pdf
UENR3742 - Systems Operation (422F2; 427F2; 428F2; 432F2 and 434F2 Backhoe Loaders Transmission (Standard Shift)).pdf
UENR3742 - Testing and Adjusting (422F2; 427F2; 428F2; 432F2 and 434F2 Backhoe Loaders Transmission (Standard Shift)).pdf
UENR3743 - Disassembly and Assembly (422F2; 427F2; 428F2; 432F2; 434F2 and 444F2 Backhoe Loaders Powertrain).pdf
UENR3744 - Specifications (422F2; 426F2; 427F2; 428F2; 432F2; 434F2 and 444F2 Backhoe Loaders Axles; Differential and Brakes).pdf
UENR3745 - Systems Operation & Testing and Adjusting (422F2; 426F2; 427F2; 428F2; 432F2; 434F2 and 444F2 Backhoe Loaders Axles; Differential and Brakes).pdf
UENR3746 - Specifications (422F2; 427F2; 428F2; 432F2; 434F2 and 444F2 Backhoe Loaders Hydraulic and Steering System).pdf
UENR3747 - Systems Operation (422F2; 427F2; 426F2; 428F2; 432F2; 434F2 and 444F2 Backhoe Loaders Hydraulic and Steering System).pdf
UENR3747 - Testing and Adjusting (422F2; 427F2; 426F2; 428F2; 432F2; 434F2 and 444F2 Backhoe Loaders Hydraulic and Steering System).pdf

TABLE OF CONTENTS / FILE LIST:
UENR3742 - Specifications (422F2; 427F2; 428F2; 432F2 and 434F2 Backhoe Loaders Transmission (Standard Shift)).....1
  Transmission (Standard Shift).....2
  Power Train Oil Filler.....4
  Flexible Coupling Drive.....6
  Pump Drive - Mounting.....9
  Pump Lines.....11
  Governor Control.....13
  Transmission Control.....15
  Transmission Oil Pump.....19
  Steering Lines.....20
  Transmission Case.....22
UENR3742 - Systems Operation (422F2; 427F2; 428F2; 432F2 and 434F2 Backhoe Loaders Transmission (Standard Shift)).....31
  General Information.....32
  Torque Converter.....33
  Transmission (Two-Wheel Drive).....36
  Transmission (All-Wheel Drive).....56
  Transmission Control.....61
  Transmission Hydraulic System.....70
UENR3742 - Testing and Adjusting (422F2; 427F2; 428F2; 432F2 and 434F2 Backhoe Loaders Transmission (Standard Shift)).....73
  Power Train Troubleshooting.....74
  Pressure Taps - Standard Shift.....79
  Transmission and Torque Converter - Test.....81
UENR3743 - Disassembly and Assembly (422F2; 427F2; 428F2; 432F2; 434F2 and 444F2 Backhoe Loaders Powertrain).....93
  Axle Housing (Service Brakes; Differential and Bevel Gear) - Disassemble.....95
  System Pressure - Release.....108
  Solenoid Valve (Transmission) - Remove and Install.....109
  Transmission (Direct Drive) - Remove.....111
  Transmission (Direct Drive) - Disassemble.....119
  Transmission (Direct Drive) - Assemble.....151
  Transmission (Direct Drive) - Install.....187
  Transmission (Power Shift) - Remove.....195
  Transmission (Power Shift) - Disassemble.....201
  Transmission (Power Shift) - Assemble.....276
  Transmission (Power Shift) - Install.....314
  Drive Shaft (Front) - Remove and Install.....320
  Drive Shaft (Rear) - Remove and Install.....322
  Parking Brake - Remove and Install.....324
  Tie Rod (Steering)(Front) - Remove and Install.....329
  Final Drive Planetary - Remove and Install - Front.....332
  Final Drive Planetary - Remove and Install - Rear.....334
  Axle Housing and Flange - Remove.....337
  Axle Housing and Flange - Disassemble.....346
  Axle Housing and Flange - Assemble.....351
  Axle Housing and Flange - Install.....357
  Axle Housing (Differential and Bevel Gear) (Front) - Remove and Install.....366
  Axle Shaft - Remove and Install.....368
  Axle Housing (Differential and Bevel Gear) (Front) - Disassemble.....371
  Axle Housing (Differential and Bevel Gear) (Front) - Assemble.....388
  Drive and Steering Axle (Front) - Remove.....408
  Drive and Steering Axle (Front) - Install.....413
  Steering Cylinder (Front) - Remove and Install.....418
  Steering Cylinder (Rear) - Remove and Install.....422
  Rear Axle - Remove.....429
  Rear Axle - Install.....433
  Axle Housing; Axle Shaft; and Wheel Flange - Remove - AWS Axle.....437
  Axle Housing; Axle Shaft; and Wheel Flange - Remove - 2WS Axle.....440
  Axle Housing; Axle Shaft; and Wheel Flange - Disassemble.....443
  Axle Housing; Axle Shaft; and Wheel Flange - Assemble.....452
  Axle Housing; Axle Shaft; and Wheel Flange - Install - 2WS Axle.....463
  Axle Housing; Axle Shaft; and Wheel Flange - Install - AWS Axle.....465
  Axle Housing (Service Brakes; Differential and Bevel Gear) - Assemble.....468
  Tire and Rim (Front) - Remove and Install.....491
  Tire and Rim (Rear) - Remove and Install.....494
UENR3744 - Specifications (422F2; 426F2; 427F2; 428F2; 432F2; 434F2 and 444F2 Backhoe Loaders Axles; Differential and Brakes).....497
  Axle (Front) - Two-Wheel Drive.....498
  Axle (Front).....500
  Wheel and Tire (Front).....505
  Axle (Rear).....509
  Wheel and Tire (Rear) Wheel and Tire (Rear).....516
  Drive Shaft.....519
  Parking Brake Control.....521
  Service Brake Control.....523
UENR3745 - Systems Operation & Testing and Adjusting (422F2; 426F2; 427F2; 428F2; 432F2; 434F2 and 444F2 Backhoe Loaders Axles; Differential and Brakes).....526
  Axle (Front).....527
  Drive and Steering Axle (Front).....530
  Axle (Rear).....533
  Parking Brake Control.....537
  Service Brake Control.....540
  Differential (Standard).....544
  Differential Lock - If Equipped.....547
  Axle (Front) - Adjust.....552
  Brake System Air - Purge.....560
  Drive and Steering Axle (Front) - Adjust.....565
  Differential Pinion Bearing - Adjust.....573
  Differential Backlash and Bearings - Adjust.....579
  Axle Housing and Bearing Preload - Adjust.....595
  Service Brake Control - Adjust.....600
UENR3746 - Specifications (422F2; 427F2; 428F2; 432F2; 434F2 and 444F2 Backhoe Loaders Hydraulic and Steering System).....607
  Radiator and Hydraulic Oil Cooler.....609
  Hydraulic Tank and Mounting.....611
  Hydraulic Hand Control.....613
  Pump Drive - Mounting.....616
  Piston Pump (Work Tool and Steering).....618
  Pump Control Valve (Pressure and Flow Compensator).....620
  Service Brake Control.....621
  Metering Pump (Steering).....626
  Hydraulic Hand Control (Loader) (Mechanically Operated).....627
  Bank Valve (Two)(Mechanically Operated).....631
  Bank Valve (Three)(Mechanically Operated).....633
  Control Valve (Lift)(Mechanically Operated).....635
  Control Valve (Tilt)(Mechanically Operated).....636
  Hydraulic Pedal Control.....637
  Lines (Hydraulic) - Return.....639
  Lines (Hydraulic) - Lift and Tilt Cylinder.....641
  Bank Valve (Five)(Mechanically Operated).....642
  Control Manifold (Outlet).....644
  Control Valve (Stick)(Mechanically Operated).....646
  Control Valve (Swing)(Mechanically Operated).....648
  Control Valve (Auxiliary) (Mechanically Operated).....650
  Lift Cylinder.....652
  Tilt Cylinder.....654
  Multipurpose Bucket Cylinder.....656
  Stabilizer Cylinder.....658
  Sliding Frame.....660
  Boom Cylinder.....663
  Boom.....665
  Swing Cylinder.....667
  Swing Frame.....670
  Bucket Cylinder (Backhoe).....675
  Bucket Cylinder Lines.....678
  Bucket Linkage.....680
  Bucket.....686
  Stick - 4.9 m (16.00 ft).....687
  Stick - 4.3 m (14.00 ft).....690
  Stick.....695
  Stick Cylinder.....698
  Lift Arm.....701
  Transport Lock.....705
  Ride Control Accumulator.....707
  Ride Control Manifold.....709
  Ride Control Lines.....711
  Steering Control.....713
  Steering Control Group.....715
UENR3747 - Systems Operation (422F2; 427F2; 426F2; 428F2; 432F2; 434F2 and 444F2 Backhoe Loaders Hydraulic and Steering System).....717
  General Information (Steering).....718
  Sideshift Slide Lock Circuit - If Equipped.....720
  Hydraulic System Lockout.....725
  Ride Control System.....727
  Control Manifold (Sideshift).....731
  Sideshift System.....734
  Control Valve (Stabilizer).....735
  Control Valve (Auxiliary) - Mechanically Operated.....744
  Control Valve (Boom) - Mechanically Operated.....747
  Control Valve (Swing) - Mechanically Operated.....751
  Control Valve (Bucket) - Mechanically Operated.....755
  Control Valve (Stick) - Mechanically Operated.....758
  Control Valve (Extendable Stick) - Mechanically Operated.....762
  Bank Valve (Backhoe) - Mechanically Operated.....765
  Control Valve (Auxiliary)(Loader) - Mechanically Operated.....768
  Bank Valve (Loader) - Single Tilt - Direct Operating.....771
  Load Control Valve (Boom or Stick) - If Equipped.....773
  Load Control Valve (Lift) - If Equipped.....780
  Crossover Relief Valve (Swing Cushion) - If Equipped.....783
  Priority Valve - Inlet Manifold of the Loader.....785
  Piston Pump (Work Tool and Steering).....787
  Hydraulic Tank and Filter.....795
  General Information (Hydraulic System).....798
UENR3747 - Testing and Adjusting (422F2; 427F2; 426F2; 428F2; 432F2; 434F2 and 444F2 Backhoe Loaders Hydraulic and Steering System).....808
  System Pressure - Release.....809
  Hydraulic Oil Contamination - Test.....811
  Hydraulic Pump - Test and Adjust.....814
  Relief Valve (Line) - Test and Adjust.....824
  Pilot System Pressure - Test.....829
  Relief Valve (Loader) - Test and Adjust.....833
  Ride Control - Test.....837
  Ride Control Accumulator - Test and Charge.....840
  Worksheets - Troubleshoot.....842
UENR3749 - Disassembly and Assembly (422F2; 427F2; 428F2; 432F2; 434F2 and 444F2 Backhoe Loaders Machine Systems).....844
  Bucket Positioner Control - Remove and Install - Single Tilt.....846
  Bucket Positioner Control - Remove and Install - Parallel Lift.....848
  System Pressure - Release.....850
  Bucket - Remove and Install.....851
  Tilt Cylinder - Remove and Install - Parallel Lift.....857
  Tilt Cylinder - Remove and Install - Single Tilt.....861
  Lift Cylinder - Remove and Install - Parallel Lift.....867
  Lift Cylinder - Remove and Install - Single Tilt.....871
  Lift Arms - Remove and Install - Parallel Lift.....874
  Lift Arms - Remove and Install - Single Tilt.....879
  Hoe Bucket - Remove and Install.....884
  Quick Coupler - Remove and Install - Parallel Lift.....885
  Backhoe Bucket Linkage - Remove and Install.....887
  Backhoe Bucket Cylinder - Remove and Install.....889
  Stick Cylinder - Remove and Install.....893
  Stick - Remove and Install.....899
  Extendable Stick Cylinder - Remove and Install.....903
  Extendable Stick - Remove and Install.....906
  Boom Cylinder - Remove and Install.....909
  Boom - Remove and Install.....915
  Swing Cylinder - Remove and Install.....919
  Swing Frame - Remove.....923
  Swing Frame - Install.....926
  Sliding Frame and Bearing - Remove.....929
  Sliding Frame and Bearing - Install.....931
  Stabilizer Cylinder - Remove and Install.....934
  Stabilizer - Remove and Install.....938
  Service Brake Control - Remove and Install.....940
  Stabilizer Control Valve - Remove and Install.....944
  Bank Valve (Backhoe) - Remove.....947
  Bank Valve (Backhoe) - Install.....950
  Bank Valve (Loader) - Remove.....953
  Bank Valve (Loader) - Install.....956
  Piston Pump (Main Hydraulic) - Remove and Install.....959
  Hydraulic Tank - Remove and Install.....961
  Steering Metering Pump - Remove and Install.....963
  Steering Wheel - Remove and Install.....967
  Window Wiper and Wiper Motor (Front) - Remove and Install.....969
  Window Wiper and Wiper Motor (Rear) - Remove and Install.....975
  Canopy - Remove and Install.....977
  Cab - Remove.....989
  Cab - Install.....1002
  Refrigerant Accumulator - Remove and Install.....1014
  Ride Control Accumulator - Remove and Install.....1016
  Seat - Remove and Install.....1018
  Air Conditioner and Heater - Remove and Install.....1021
  Fuel Tank - Remove and Install.....1028
  Counterweight - Remove and Install.....1031
UENR3750 - Schematic (416F2; 422F2; 428F2 and 434F2 Backhoe Loader Electrical System; Cab; Engine and Chassis (LYA1-374 LYK1-327 LYG1-1811 LYF1-801 LBF1-2291).....1032
  Feature.....1032
  Cover Page.....1034
  Information.....0
    Component Location.....0
      Cab Wiring.....1035
      Engine and Chassis Wiring.....1036
    Connector Location.....0
      Cab Wiring.....1037
      Engine and Chassis Wiring.....1038
  Schematics.....0
    Cab Wiring.....1039
    Engine and Chassis Wiring.....1040
  Machine Views.....0
    Cab Wiring.....0
      Dash Wiring.....1041
      HVAC and Washer Wiring.....1042
      Return To DIG Wiring.....1043
      RH Console Wiring.....1044
      Ride Control Wiring.....1045
    Engine and Chassis Wiring.....0
      AWS Wiring.....1046
      Engine Wiring (Left View).....1047
      Engine Wiring (Right View).....1048
      Headliner and Attachment Wiring.....1049
      HVAC Wiring.....1050
      Load Check Disable Wiring.....1051
      Manual XMSN Wiring.....1052
      Object Handling Wiring.....1053
      Rear Valve and Frame Wiring.....1054
      Right Console Wiring.....1055
UENR5026 - Disassembly and Assembly (415F2; 416F2; 420F2 IT; 420F2 ST; 430F2 IT and 430F2 ST Backhoe Loaders Machine Systems).....1056
  System Pressure - Release.....1058
  Bucket - Remove and Install.....1060
  Bucket Positioner Control - Remove and Install - Single Tilt.....1066
  Bucket Positioner Control - Remove and Install - Parallel Lift.....1069
  Tilt Cylinder - Remove and Install - Parallel Lift.....1071
  Tilt Cylinder - Remove and Install - Single Tilt.....1075
  Lift Cylinder - Remove and Install - Parallel Lift.....1082
  Lift Cylinder - Remove and Install - Single Tilt.....1086
  Lift Arms - Remove and Install - Parallel Lift.....1089
  Lift Arms - Remove and Install - Single Tilt.....1095
  Hoe Bucket - Remove and Install.....1100
  Quick Coupler - Remove and Install - Parallel Lift.....1102
  Backhoe Bucket Linkage - Remove and Install.....1104
  Backhoe Bucket Cylinder - Remove and Install.....1107
  Stick Cylinder - Remove and Install.....1111
  Stick - Remove and Install.....1117
  Extendable Stick Cylinder - Remove and Install.....1121
  Extendable Stick - Remove and Install.....1125
  Boom Cylinder - Remove and Install.....1128
  Boom - Remove and Install.....1134
  Swing Cylinder - Remove and Install.....1139
  Swing Frame - Remove.....1144
  Swing Frame - Install.....1148
  Stabilizer Cylinder - Remove and Install.....1151
  Stabilizer - Remove and Install.....1156
  Service Brake Control - Remove and Install.....1159
  Stabilizer Control Valve - Remove and Install.....1164
  Bank Valve (Backhoe) - Remove.....1167
  Bank Valve (Backhoe) - Install.....1171
  Bank Valve (Loader) - Remove.....1174
  Bank Valve (Loader) - Install.....1177
  Piston Pump (Main Hydraulic) - Remove and Install.....1180
  Hydraulic Tank - Remove and Install.....1183
  Steering Metering Pump - Remove and Install.....1186
  Steering Wheel - Remove and Install.....1190
  Window Wiper and Wiper Motor (Front) - Remove and Install.....1192
  Window Wiper and Wiper Motor (Rear) - Remove and Install.....1198
  Canopy - Remove and Install.....1200
  Cab - Remove.....1212
  Cab - Install.....1226
  Refrigerant Accumulator - Remove and Install.....1238
  Ride Control Accumulator - Remove and Install.....1240
  Seat - Remove and Install.....1242
  Air Conditioner and Heater - Remove and Install.....1245
  Fuel Tank - Remove and Install.....1252
  Counterweight - Remove and Install.....1255
UENR5153 - Schematic (416F2; 422F2; 428F2 and 434F2 Backhoe Loader Electrical System; Cab Wiring; Engine & Chassis Wiring (LYF802-UP LYG1812-UP LYK328-UP LBF2292-UP LYA375-UP).....1257
  Feature.....1257
  Cover Page.....1259
  Information.....0
    Component Location.....0
      Cab Wiring.....1260
      Engine and Chassis Wiring.....1261
    Connector Location.....0
      Cab Wiring.....1262
      Engine and Chassis Wiring.....1263
  Schematics.....0
    Cab Wiring.....1264
    Engine and Chassis Wiring.....1265
  Machine Views.....0
    Cab Wiring.....0
      Dash Wiring.....1266
      Front Dash Wiring.....1267
      HVAC and Washer Wiring.....1268
      Quick Coupler View.....1269
      Return To Dig Wiring.....1270
      RH Console Wiring.....1271
      Ride Control Wiring.....1272
    Engine and Chassis Wiring.....0
      AWS Wiring.....1273
      Engine Wiring (Left View).....1274
      Engine Wiring (Right View).....1275
      Headliner and Attachment Wiring.....1276
      HVAC Wiring.....1277
      Load Check Disable Wiring.....1278
      Manual XMSN Wiring.....1279
      Object Handling Wiring.....1280
      Rear Valve and Frame Wiring.....1281
      Right Console Wiring.....1282
UENR5153 - Schematic (422F2; 427F2; 428F2 and 434F2 Backhoe Loader Hydraulic System).....1283
  Features.....1283
  Cover page.....1285
  Tables.....0
    Components.....1286
    Taps.....1287
  Schematic.....1288
  Machine Views.....0
    Under Cab.....1289
    Rear Machine.....1290
    MP Bucket.....1291
    Boom with E-Stick.....1292
    Front 427 428 434.....1293
    Front 422F.....1294
UENR6152 - Disassembly and Assembly (416F2; 420F2 IT; 420F2 ST; 422F2; 428F2; 430F2 IT; 430F2 ST; 432F2; 434F2 and 444F2 Backhoe Loaders Engine Supplement).....1295
  System Pressure - Release.....1296
  Hood - Remove and Install.....1297
  Side Panel - Remove and Install.....1299
  Muffler - Remove and Install.....1301
  Battery - Remove and Install.....1304
  Electric Starting Motor - Remove and Install.....1307
  Alternator - Remove and Install.....1309
  Refrigerant Compressor - Remove and Install.....1311
  Air Cleaner - Remove and Install.....1314
  Turbocharger - Remove and Install.....1316
  Water Pump - Remove and Install.....1318
  Water Temperature Regulator - Remove and Install.....1326
  Fan - Remove and Install.....1328
  Fan Drive - Remove and Install.....1331
  Fuel Filter and Water Separator - Remove and Install.....1333
  Radiator - Remove and Install.....1335
  Refrigerant Condenser - Remove and Install.....1337
  Hydraulic and Transmission Oil Cooler - Remove and Install.....1339
  Radiator; Fuel Cooler; After Cooler; and Hydraulic and XMSN Oil Cooler - Remove and Install.....1341
  Engine - Remove.....1348
  Engine - Install.....1356

Caterpillar Backhoe Loaders 422F2, 427F2, 428F2, 432F2, 434F2 Workshop Service Repair Manual