Caterpillar 440, 450 Backhoe Loaders 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 (1,812 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.

M0090723 - Troubleshooting (440 and 450 Backhoe Loaders Monitoring System).pdf
M0090728 - Troubleshooting; Systems Operation; Testing and Adjusting (440; 450 Backhoe Loader).pdf
M0092671 - Disassembly and Assembly (440; 450 Backhoe Loader Engine Supplement).pdf
M0092673 - Disassembly and Assembly (440; 450 Backhoe Loaders Powertrain Systems).pdf
M0092674 - Disassembly and Assembly (440; 450 Backhoe Loaders Machine Systems).pdf
M0090375 - Specifications (440 and 450 Backhoe Loader Hydraulic and Steering System).pdf
M0090709 - Service Manual (440 and 450 Backhoe Loaders Transmission - Specifications; Systems Operation; Testing & Adjusting).pdf
M0090714 - Specifications (440 and 450 Backhoe Loader Axles; Differential and Brakes).pdf
M0090715 - Testing and Adjusting; Systems Operation (440 and 450 Backhoe Loader Axle; Differential; and Brakes).pdf
M0090719 - Systems Operation; Testing and Adjusting (440 and 450 Backhoe Loaders Hydraulic and Steering System).pdf
M0090723 - Systems Operation (440 and 450 Backhoe Loaders Monitoring System).pdf
M0090723 - Testing and Adjusting (440 and 450 Backhoe Loaders Monitoring System).pdf
UENR8141 - Schematic (440 & 450 Backhoe Loader Hydraulic System).pdf
UENR8142 - Schematic (440 & 450 Backhoe Loader Electrical System; Cab Wiring; Engine and DEF Wiring; Chassis Wiring (DYN1-UP MZX1-UP KJH1-UP DC91-UP).pdf

TABLE OF CONTENTS:
M0090375 - Specifications (440 and 450 Backhoe Loader Hydraulic and Steering System)...1
  Hydraulic Lines Mounting...4
  Auxiliary Hydraulic Lines...6
  Suction Fan...8
  Refrigerant Condenser and Mounting...9
  Refrigerant Compressor...10
  Heater and Air Conditioner Lines...12
  Air Conditioner and Mounting...14
  Radiator and Hydraulic Oil Cooler...15
  Hydraulic Tank and Mounting...18
  Oil Filter (Hydraulic)...20
  Hydraulic Oil Filter and Mounting...21
  Piston Pump...22
  Limit Switch (Service Brake)...23
  Metering Pump (Steering)...25
  Joystick Control Mounting...26
  Hydraulic Accumulator (Pilot Oil)...28
  Bank Valve (Three)(Mechanically Operated)...29
  Control Valve - Fork...30
  Control Valve - Coupler...32
  Lines (Hydraulic) - Return...33
  Bank Valve (Eight) (Pilot Operated)...35
  Lines (Lift Cylinder)...38
  Lift Cylinder...40
  Lines (Tilt Cylinder)...42
  Tilt Cylinder...44
  Multipurpose Bucket Cylinder...46
  Coupler Lines...48
  Quick Coupler...53
  Stabilizer Cylinder - LH...56
  Stabilizer Cylinder - RH...58
  Boom Cylinder...60
  Boom Guard...62
  Boom - 4.5 m (15 ft)...64
  Swing Cylinder...66
  Swing Cylinder Lines...68
  Swing Frame...69
  Bucket Cylinder (Backhoe)...71
  Bucket Cylinder Lines...73
  Bucket Linkage...75
  Bucket...77
  Bucket Mounting...79
  Backhoe and Stabilizer Linkages...81
  Stick - Extendable - 4.57 m (15.000 ft)...83
  Stick Cylinder...86
  Bucket Cylinder (Extendable Stick)...88
  Cylinder Guard - Stabilizer...90
  Loader Frame...91
  Lift Arm...93
  Position Sensor and Mounting...95
  Transport Lock...96
  Ride Control Manifold...98
  Steering Lines...100
  Steering Control Group...102
  Air Cleaner...103
  Fuel Tank...105
  Fuel Lines...107
  Diesel Exhaust Fluid Lines...109
  Exhaust Extension...111
  Flexible Exhaust Pipe...112
  Counterweight...114
  Cab Trim - Roof...116
  Seat Mounting...117
  Engine Hood...118
  Flood Lamp...119
  Seat Belt...120
  Fender - Rear...121
  Fender - Front...123
  Window Wiper and Wiper Motor...124
  Hood - Guard...126
  Cab Window...128
  Cab Window - RH...130
  Cab Door - LH...134
  Cab Door - RH...136
  Quick Coupler Lock...138
M0090709 - Service Manual (440 and 450 Backhoe Loaders Transmission - Specifications; Systems Operation; Testing & Adjusting)...141
  Specifications...141
    Torque Converter...142
    Power Train Oil Filler...143
    Flexible Coupling Drive...144
    Transmission Oil Pump...145
    Pump Lines...147
    Governor Control...149
    Transmission Control...151
    Solenoid Valve (Autoshift)...155
    Steering Lines...160
    Transmission Case...164
  Systems Operation...176
    General Information...177
    Torque Converter...178
    Transmission...182
    Transmission Control...214
    Transmission Hydraulic System...235
  Testing and Adjusting...241
    Machine Preparation for Troubleshooting...242
    Visual Inspection...243
    Pressure Taps - Autoshift...245
    Transmission and Torque Converter - Test...248
M0090714 - Specifications (440 and 450 Backhoe Loader Axles; Differential and Brakes)...257
  Drive and Steering Axle (Front)...258
  Wheel and Tire (Front)...264
  Wheel and Tire (Rear)...265
  Drive Shaft...266
  Solenoid Valve and Mounting (Differential Lock)...267
  Service Brake Control...268
  Drive Group (Flexible Coupling)...270
  Pilot Oil Accumulator...271
M0090715 - Testing and Adjusting; Systems Operation (440 and 450 Backhoe Loader Axle; Differential; and Brakes)...273
  Drive and Steering Axle (Front)...274
  Axle (Rear)...277
  Parking Brake...280
  Service Brake Control...284
  Service Brake Control - Power Assist...287
  Differential Lock...291
  Brake System Air - Purge...297
  Drive and Steering Axle (Front) - Adjust...301
  Differential Pinion Bearing - Adjust - 440 Rear Axle...305
  Differential Backlash and Bearings - Adjust - 440 Rear Axle...310
  Axle Housing and Bearing Preload - Adjust...320
  Parking Brake - Test and Adjust...325
  Service Brake Control - Adjust...330
M0090719 - Systems Operation; Testing and Adjusting (440 and 450 Backhoe Loaders Hydraulic and Steering System)...339
  General Information (Hydraulic System)...340
  Hydraulic Tank and Filter...346
  Piston Pump (Work Tool and Steering)...348
  Bank Valve (Loader)...355
  Control Valve (Main)...359
  Bank Valve (Backhoe)...379
  Control Valve (Extendable Stick) - Pilot Operated...382
  Crossover Relief Valve (Swing Cushion) - If Equipped...388
  Control Valve (Auxiliary) - Electro-Hydraulically Operated...390
  Ride Control System...395
  General Information (Steering)...398
  Metering Pump (Steering)...401
  System Pressure - Release...404
  Hydraulic Oil Contamination - Test...406
  Hydraulic Pump - Test and Adjust...409
  Relief Valve (Line) - Test and Adjust...415
  Pilot System Pressure - Test...425
  Ride Control Accumulator - Test and Charge...429
  Worksheets - Troubleshoot...431
M0090723 - Systems Operation (440 and 450 Backhoe Loaders Monitoring System)...434
  Monitoring System...435
  Display Module...436
  Data Link...455
  Menu Navigation...457
  Totals Menu...459
  Service Menu...465
  Settings Menu...475
M0090723 - Testing and Adjusting (440 and 450 Backhoe Loaders Monitoring System)...496
  Module - Replace...497
  Module - Flash Program...499
  Connector Contact Description...502
  System Schematic...504
M0090723 - Troubleshooting (440 and 450 Backhoe Loaders Monitoring System)...506
  General Information...507
  Service Tools...508
  Diagnostic Capabilities...510
  Determining Diagnostic Trouble Codes...514
  Diagnostic Trouble Codes...520
M0090728 - Troubleshooting; Systems Operation; Testing and Adjusting (440; 450 Backhoe Loader)...521
  Systems Operation...522
    Features...523
    Electrical Input Components...536
    Electronic Control Module...592
    Electrical Output Components...595
  Testing and Adjusting...627
    Calibration...628
    Connector Contact Description...642
    System Schematic...657
  Troubleshooting...660
    General Information...662
    Service Tools...664
    Connector Locations...666
    Diagnostic Capabilities...667
    Machine Preparation for Troubleshooting...683
    Operational Checks (Axle; Differential)...687
    Operational Checks (Brake System)...689
    Operational Checks (Hydraulic System)...691
    Operational Checks (Transmission)...692
    Operational Checks (Steering System)...694
    Determining Diagnostic Trouble Codes...695
    Diagnostic Trouble Codes...700
    Event Codes...710
    Symptom Troubleshooting...718
    Emerging Symptom Information...720
    Axle and Differential...721
    Brake System...725
    Hydraulic System...728
    Steering System...737
    Transmission...741
    CAN Data Link - Test...748
    Charging System - Test...756
    Electrical Connector - Inspect...757
    Electrical Power Supply - Test...764
    Operator Control Switch (Switch to Ground) - Test...772
    Sensor Signal (Analog; Passive) - Test...784
    Sensor Signal (PWM) - Test...791
    Sensor Supply - Test...806
    Solenoid Valve - Test...814
    Solenoid Valve (Switch Controlled) - Test...834
    Wiring Harness (Open Circuit) - Test...841
    Wiring Harness (Short Circuit) - Test...843
M0092671 - Disassembly and Assembly (440; 450 Backhoe Loader Engine Supplement)...844
  System Pressure - Release...845
  Hood - Remove and Install...846
  Side Panel - Remove and Install...848
  Muffler - Remove and Install - Clean Emissions Module...850
  Battery - Remove and Install - Dual Batteries...863
  Electric Starting Motor - Remove and Install...868
  Refrigerant Compressor - Remove and Install...874
  Alternator - Remove and Install...879
  Fan - Remove and Install...884
  Fan Drive - Remove and Install...890
  Water Pump - Remove and Install...892
  Water Temperature Regulator - Remove and Install...897
  Radiator; Fuel Cooler; After Cooler; and Hydraulic and XMSN Oil Cooler - Remove and Install...899
  Refrigerant Condenser - Remove and Install...917
  Hydraulic and Transmission Oil Cooler - Remove and Install...921
  Radiator - Remove and Install...924
  Turbocharger - Remove and Install...926
  Diesel Exhaust Fluid Filter - Remove and Install...933
  Diesel Exhaust Fluid Pump - Remove and Install...938
  Diesel Exhaust Fluid Injector - Remove and Install...942
  Fuel Filter and Water Separator - Remove and Install...948
  Air Cleaner - Remove and Install...950
  Engine - Remove...952
  Engine - Install...969
M0092673 - Disassembly and Assembly (440; 450 Backhoe Loaders Powertrain Systems)...987
  System Pressure - Release...989
  Solenoid Valve (Transmission) - Remove...990
  Solenoid Valve (Transmission) - Install...993
  Transmission (Power Shift) - Remove...996
  Transmission (Power Shift) - Disassemble...1012
  Transmission (Power Shift) - Assemble...1067
  Transmission (Power Shift) - Install...1128
  Drive Shaft (Front) - Remove and Install...1143
  Drive Shaft (Rear) - Remove...1145
  Drive Shaft (Rear) - Install...1147
  Parking Brake - Remove and Install...1149
  Tie Rod (Steering)(Front) - Remove and Install...1152
  Final Drive Planetary - Remove and Install - Rear...1155
  Axle Housing and Flange - Remove...1158
  Axle Housing and Flange - Disassemble...1164
  Axle Housing and Flange - Assemble...1168
  Axle Housing and Flange - Install...1172
  Axle Shaft - Remove and Install...1179
  Axle Housing (Differential and Bevel Gear) (Front) - Remove...1182
  Axle Housing (Differential and Bevel Gear) (Front) - Disassemble...1183
  Axle Housing (Differential and Bevel Gear) (Front) - Assemble...1193
  Axle Housing (Differential and Bevel Gear) (Front) - Install...1207
  Drive and Steering Axle (Front) - Remove...1209
  Drive and Steering Axle (Front) - Install...1212
  Steering Cylinder (Front) - Remove...1216
  Steering Cylinder (Front) - Install...1218
  Rear Axle - Remove...1220
  Rear Axle - Install...1225
  Axle Housing; Axle Shaft; and Wheel Flange - Remove...1231
  Axle Housing; Axle Shaft; and Wheel Flange - Disassemble...1233
  Axle Housing; Axle Shaft; and Wheel Flange - Assemble...1239
  Axle Housing; Axle Shaft; and Wheel Flange - Install...1246
  Axle Housing (Service Brakes; Differential and Bevel Gear) - Assemble...1248
  Axle Housing (Service Brakes; Differential and Bevel Gear) - Disassemble...1270
  Tire and Rim (Front) - Remove and Install...1282
  Tire and Rim (Rear) - Remove and Install...1286
M0092674 - Disassembly and Assembly (440; 450 Backhoe Loaders Machine Systems)...1289
  Bucket Positioner Control - Remove and Install...1292
  System Pressure - Release...1298
  Tilt Cylinder - Remove and Install...1299
  Tilt Cylinder - Disassemble...1309
  Tilt Cylinder - Assemble...1317
  Lift Cylinder - Remove and Install...1324
  Lift Cylinder - Disassemble...1329
  Lift Cylinder - Assemble...1337
  Lift Arms - Remove and Install...1344
  Hoe Bucket - Remove and Install...1352
  Quick Coupler - Remove and Install - Backhoe Bucket Linkage...1354
  Quick Coupler - Remove and Install - Loader Bucket...1358
  Backhoe Bucket Linkage - Remove and Install...1364
  Backhoe Bucket Cylinder - Remove and Install...1369
  Backhoe Bucket Cylinder - Disassemble...1374
  Backhoe Bucket Cylinder - Assemble...1382
  Stick Cylinder - Remove and Install...1389
  Stick Cylinder - Disassemble...1395
  Stick Cylinder - Assemble...1403
  Stick - Remove and Install - Equipped with extendable stick...1410
  Stick - Remove and Install...1420
  Extendable Stick Cylinder - Remove and Install...1425
  Extendable Stick Cylinder - Disassemble...1431
  Extendable Stick Cylinder - Assemble...1437
  Extendable Stick - Remove and Install...1443
  Boom Cylinder - Remove and Install...1455
  Boom Cylinder - Disassemble...1464
  Boom Cylinder - Assemble...1472
  Boom - Remove and Install...1479
  Swing Cylinder - Remove and Install...1486
  Swing Cylinder - Disassemble...1491
  Swing Cylinder - Assemble...1499
  Swing Frame - Remove...1507
  Swing Frame - Install...1518
  Stabilizer Cylinder - Remove and Install...1528
  Stabilizer Cylinder - Disassemble...1532
  Stabilizer Cylinder - Assemble...1540
  Stabilizer - Remove and Install...1547
  Service Brake Control - Remove and Install...1550
  Joystick Control - Remove and Install - Seat Mounted...1557
  Bank Valve (Backhoe) - Remove...1564
  Bank Valve (Backhoe) - Install...1571
  Bank Valve (Loader) - Remove...1578
  Bank Valve (Loader) - Disassemble...1585
  Bank Valve (Loader) - Assemble...1600
  Bank Valve (Loader) - Install...1615
  Piston Pump (Main Hydraulic) - Remove and Install...1621
  Piston Pump (Main Hydraulic) - Disassemble...1628
  Piston Pump (Main Hydraulic) - Assemble...1638
  Hydraulic Tank - Remove and Install...1649
  Steering Metering Pump - Remove and Install...1655
  Steering Wheel - Remove and Install...1660
  Window Wiper and Wiper Motor (Front) - Remove and Install...1662
  Window Wiper and Wiper Motor (Rear) - Remove and Install...1671
  Canopy - Remove and Install...1675
  Cab - Remove...1703
  Cab - Install...1726
  Refrigerant Accumulator - Remove and Install...1750
  Ride Control Accumulator - Remove and Install...1753
  Seat - Remove and Install...1755
  Air Conditioner and Heater - Remove and Install...1760
  Fuel Tank - Remove and Install...1772
  Counterweight - Remove and Install...1776
UENR8141 - Schematic (440 &450 Backhoe Loader Hydraulic System)...1778
  Features...1778
  Cover Page...1780
  Information...0
    Component Location...1781
    Tap Location...1782
  Schematic...1783
  Machine Views...0
    Machine - Left Side View...1784
    Machine - Rear View...1785
    Machine - Right Side View...1786
    Machine Top View - Pump Gp...1787
    Quick Coupler...1788
UENR8142 - Schematic (440 & 450 Backhoe Loader Electrical System; Cab Wiring; Engine and DEF Wiring; Chassis Wiring (DYN1-UP MZX1-UP KJH1-UP DC91-UP))...1789
  Feature...1789
  Cover Page...1791
  Information...0
    Component Location...0
      Vol 1 - Cab Wiring...1792
      Vol 2 - Engine and DEF  Wiring...1793
      Vol 3 - Chassis Wiring...1794
    Connector Location...0
      Vol 1 - Cab Wiring...1795
      Vol 2 - Engine and DEF  Wiring...1796
      Vol 3 - Chassis Wiring...1797
  Schematics...0
    Vol 1 - Cab Wiring...1798
    Vol 2 - Engine and DEF  Wiring...1799
    Vol 3 - Chassis Wiring...1800
  Machine Views...0
    Vol 1 - Cab Wiring...0
      Cab - Front View...1801
      Cab - Platform Wiring...1802
      Cab - Side Console...1803
      Cab - Bottom View...1804
      Power Distribution Board - Relays and Fuses...1805
    Vol 2 - Engine and DEF  Wiring...0
      Battery and DEF Wiring...1806
      Engine Top View...1807
      Machine Front View...1808
      Machine Left Side - Engine Wiring...1809
      Machine Right Side - Engine Wiring...1810
    Vol 3 - Chassis Wiring...0
      Cab - Front View...1811
      Cab - Left Side View...1812
      Cab - Rear View...1813
      Cab - Side Console Front View...1814
      Cab - Side Console Rear View...1815
      Machine Bottom View...1816
      Machine - Right Side View...1817

Caterpillar Backhoe Loaders 440 and 450 Workshop Service Repair Manual