Complete Diagnosis and Test Service manual with Electrical Wiring Diagrams for John Deere 4WD Loader 644J (SN. before 611231), 724J (SN. before 611218), with service information to maintain, diagnose, and rebuild like professional mechanics.

John Deere 4WD Loaders 644J, 724J workshop Diagnostics Service 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.

TM2075 - John Deere 644J, 724J 4WD Loader Technical Manual - Operation and Test.PDF
TM2075 - John Deere 644J, 724J 4WD Loader Technical Manual - Operation and Test.EPUB

Total Pages: 1,162 pages
File Format: PDF/EPUB/MOBI/AZW (PC/Mac/Android/Kindle/iPhone/iPad; bookmarked, ToC, Searchable, Printable)
Language: English

MAIN SECTIONS
  Foreword
   Technical Information Feedback Form
   General Information
      Safety Information
   Operational Checkout Procedure
      Operational Checkout Procedure
   Engine
      Theory Of Operation
      Diagnostic Information
      Tests
   Electrical System-644J and 724J (S.N. -590067)
      System Information
      System Diagrams
      Sub-System Diagnostics
      References
   Electrical System-644J And 724J (S.N. 590068-600915)
      System Information
      System Diagrams
      Sub-System Diagnostics
      References
   Electrical System-644J And 724J (S.N. 600916- )
      System Information
      System Diagrams
      Sub-System Diagnostics
      References
   Power Train
      Theory Of Operation
      Diagnostic Information
      Adjustments
      Tests
   Hydraulic System
      Theory Of Operation
      Diagnostic Information
      Adjustments
      Test
   Heating And A/C
      Theory Of Operation
      Diagnostic Information
      Tests

tm2075 - 644J and 724J 4WD Loader

Table of Contents

Foreword

Technical Information Feedback Form

Section 9000: General Information

Group 01: Safety Information

Recognize Safety Information

Follow Safety Instructions

Operate Only If Qualified

Wear Protective Equipment

Avoid Unauthorized Machine Modifications

Add Cab Guarding For Special Uses

Inspect Machine

Stay Clear of Moving Parts

Avoid High-Pressure Oils

Beware of Exhaust Fumes

Prevent Fires

Prevent Battery Explosions

Handle Chemical Products Safely

Dispose of Waste Properly

Prepare for Emergencies

Use Steps and Handholds Correctly

Start Only From Operator's Seat

Use and Maintain Seat Belt

Prevent Unintended Machine Movement

Avoid Work Site Hazards

Use Special Care When Operating Loader

Keep Riders Off Machine

Avoid Backover Accidents

Avoid Machine Tip Over

Operating on Slopes

Operating or Traveling On Public Roads

Inspect and Maintain ROPS

Add and Operate Attachments Safely

Park and Prepare For Service Safely

Service Cooling System Safely

Remove Paint Before Welding or Heating

Make Welding Repairs Safely

Drive Metal Pins Safely

Section 9005: Operational Checkout Procedure

Group 10: Operational Checkout Procedure

Complete Machine Operational Checkout

Section 9010: Engine

Group 05: Theory Of Operation

POWERTECH POWERTECH is a trademark of Deere & Company 8.1L (6081) John Deere Engines

Engine Air Heater Circuit Operation (S.N. —590067)

Engine Air Heater Circuit Theory of Operation (S.N. 590068— )

Electronic Fuel Injection System Operation

Group 15: Diagnostic Information

Diagnose Engine Malfunctions

Group 25: Tests

Engine Speed Test

Fuel Line Leakage Test

Air Intake System Leakage Test

Air Filter Restriction Indicator Switch Test

Engine Power Test Using Turbocharger Boost Pressure

Section 9015A: Electrical System—644J and 724J (S.N. —590067)

Group 05: System Information

Electrical Diagram Information (S.N. —590067)

Group 10: System Diagrams

Fuse and Relay Specifications (S.N. —590067)

System Functional Schematic Section Legend (S.N. —590067)

Functional Schematic And Component Location Legend (S.N. —590067)

System Functional Schematic (S.N. —590067)

Loader Frame Harness (W2) Component Location (S.N. —590067)

Load Center Harness (W3) Component Location (S.N. —590067)

Front Console Harness (W4) Component Location (S.N. —590067)

Engine Frame Harness (W5) Component Location (S.N. —590067)

Engine Harness (W6) Component Location (S.N. —590067)

Engine Air Heater Harness (W7) Component Location (S.N. —590067)

Return-To-Dig Harness (W8) Component Location (S.N. —590067)

Ride Control Harness (W9) Component Location (S.N. —590067)

Transmission Harness (W10) Component Location (S.N. —590067)

Rear Frame Harness (W13) Component Location (S.N. —590067)

Spin Control Harness (W14) Component Location (S.N. —590067)

License Plate Light Harness (W15) Component Location (S.N. —590067)

Pin and Axle Disconnect Harness (W16) Component Location (S.N. —590067)

Secondary Steering Switch Harness (W17) Component Location (S.N. —590067)

Cab Work Lights Harness (W19) Component Location (S.N. —590067)

Blower/Air Conditioning Harness (W20) And Component Location Drawing (S.N. —590067)

Converter And Power Plug Harness (W21) Component Location (S.N. —590067)

Secondary Steering Pump Motor Harness (W23) Component Location (S.N. —590067)

Battery (Cables) Harness (W24) Component Location (S.N. —590067)

Radio Harness (W34) Component Location (S.N. —590067)

Electric Air Adjust Seat Harness (W36) Component Location (S.N. —590067)

CAN Terminator Harness (W37) Component Location (S.N. —590067)

Group 15: Sub-System Diagnostics

Start Circuit Theory Of Operation (S.N. —590067)

Ride Control Circuit Theory Of Operation (S.N. —590067)

Monitor Display Unit Circuit Theory Of Operation (S.N. —590067)

Monitor Display Unit—Accessing Menus (S.N. —590067)

Monitor Display Unit—Normal Display Menu (S.N. —590067)

Monitor Display Unit—Accessory Menu (S.N. —590067)

Monitor Display Unit—Diagnostics Menu (S.N. —590067)

Monitor Display Unit—Service Menu (S.N. —590067)

Chassis Control Unit Circuit Theory Of Operation (S.N. —590067)

Spin Control Circuit Theory Of Operation (S.N. —590067)

Transmission Control Unit Circuit Theory Of Operation (S.N. —590067)

Transmission Modes Of Operation—Manual And Automatic (S.N. —590067)

Transmission Functions Set At Monitor Display Unit (S.N. —590067)

Transmission Shift Ranges In Automatic Mode (S.N. —590067)

Transmission Control Unit Response To Malfunctions (S.N. —590067)

Park Brake Circuit Theory Of Operation (S.N. —590067)

Pilot Enable And Boom Down Circuit Theory Of Operation (S.N. —590067)

Return-to-Carry, Boom Height Kickout and Return-to-Dig Circuit Theory Of Operation (S.N. —590067)

Secondary Steering Circuit Theory Of Operation (S.N. —590067)

Engine Control Unit Circuit Theory Of Operation (S.N. —590067)

Group 20: References

Alternators And Starting Motors—Use CTM77 (S.N. —590067)

Diagnostic Trouble Codes Quick Reference List (S.N. —590067)

Transmission Diagnostic Trouble Codes (S.N. —590067)

Engine Related Diagnostic Trouble Codes (S.N. —590067)

Engine Diagnostic Trouble Codes (S.N. —590067)

Steering and Brake Diagnostic Trouble Codes (S.N. —590067)

Electrical System Diagnostic Trouble Codes (S.N. —590067)

Hydraulic System Diagnostic Trouble Codes (S.N. —590067)

Electrical Component Specifications (S.N. —590067)

Check Controller (S.N. —590067)

CAN Circuit Testing

Check Battery Electrolyte Level And Terminals (S.N. —590067)

Procedure For Testing Batteries (S.N. —590067)

Transmission Control Valve Solenoid Check (S.N. —590067)

Clutch Cut-Off Sensor Check and Adjustment (S.N. —590067)

Engine Control Unit Temperature Sensors Test (S.N. —590067)

Engine Control Unit Speed Sensors Test (S.N. —590067)

Engine Control Unit Pressure Sensors and Solenoids Test (S.N. —590067)

Throttle Position Sensor Adjustment (S.N. —590067)

Boom Height Kickout Adjustment (S.N. —590067)

Return-To-Carry Kickout Adjustment (S.N. —590067)

Return-To-Dig Adjustment (S.N. —590067)

Continuity Check For Sensors With Two Wires (S.N. —590067)

Continuity Check For Sensors With Three Wires (S.N. —590067)

Replace METRI-PACK METRI-PACK is a trademark of Packard Electric Connectors (S.N. —590067)

Replace DEUTSCH DEUTSCH is a trademark of Deutsch Co. Connectors (S.N. —590067)

Install DEUTSCH DEUTSCH is a trademark of Deutsch Co. Contact (S.N. —590067)

Replace WEATHER PACK WEATHER PACK is a trademark of Packard Electric. Connectors (S.N. —590067)

Install WEATHER PACK WEATHER PACK is a trademark of Packard Electric. Contact (S.N. —590067)

Remove And Install Transmission Control Valve Connector Body (S.N. —590067)

Install Transmission Control Valve Connector Contact (S.N. —590067)

Crimper Tool For Transmission Control Unit Connector—Operation (S.N. —590067)

Crimper Tool For Transmission Control Unit Connector—Remove And Install Die Set (S.N. —590067)

Crimper Tool For Transmission Control Unit Connector—Contact Support Adjustment (S.N. —590067)

Crimper Tool For Transmission Control Unit Connector—Crimping Procedure (S.N. —590067)

Crimper Tool For Transmission Control Unit Connector—Crimp Height Inspection (S.N. —590067)

Crimper Tool For Transmission Control Unit Connector—Crimp Height Adjustment (S.N. —590067)

Replace Transmission Control Unit Connector Terminals (S.N. —590067)

Replace Chassis Control Unit Connector Terminals (S.N. —590067)

Reprogram Monitor Display Unit (S.N. —590067)

Install CINCH CINCH is a trademark of the Cinch Co. Contact (S.N. —590067)

Remove Connector Body From Blade Terminals (S.N. —590067)

Fuse Block Terminal Remove and Install (S.N. —590067)

Pressure Switches Remove and Install (S.N. —590067)

Boom Down, Differential Lock, and Pilot Enable Solenoid Valve Remove And Install (S.N. —590067)

Section 9015B: Electrical System—644J And 724J (S.N. 590068—600915)

Group 05: System Information

Electrical Diagram Information (S.N. 590068— )

Group 10: System Diagrams

Fuse and Relay Specifications (S.N. 590068—600915)

System Functional Schematic, Wiring Diagram and Component Location Legend (S.N. 590068—600915)

System Functional Schematic and Section Legend (S.N. 590068—600915)

Loader Frame Harness (W2) Component Location (S.N. 590068—600915)

Loader Frame Harness (W2) Wiring Diagram (S.N. 590068—600915)

Load Center Harness (W3) Component Location (S.N. 590068—600915)

Load Center Harness (W3) Wiring Diagram (S.N. 590068—600915)

Front Console Harness (W4) Component Location (S.N. 590068— )

Front Console Harness (W4) Wiring Diagram (S.N. 590068— )

Engine Frame Harness (W5) Component Location (S.N. 590068— )

Engine Frame Harness (W5) Wiring Diagram (S.N. 590068— )

Engine Harness (W6) Component Location (S.N. 590068— )

Engine Harness (W6) Wiring Diagram (S.N. 590068— )

Engine Air Heater Harness (W7) Component Location (S.N. 590068— )

Engine Air Heater Harness (W7) Wiring Diagram (S.N. 590068— )

Ride Control Harness (W9) Component Location (S.N. 590068—600915)

Ride Control Harness (W9) Wiring Diagram (S.N. 590068—600915)

Transmission Harness (W10) Component Location (S.N. 590068— )

Transmission Harness (W10) Wiring Diagram (S.N. 590068— )

Rear Frame Harness (W13) Component Location (S.N. 590068— )

Rear Frame Harness (W13) Wiring Diagram (S.N. 590068—600915)

Cab Roof Harness (W19) Component Location (S.N. 590068—600915)

Cab Roof Harness (W19) Wiring Diagram (S.N. 590068—600915)

Blower and A/C Harness (W20) Component Location (S.N. 590068— )

Blower and A/C (W20) Wiring Diagram (S.N. 590068— )

Radio Harness (W34) Component Location (S.N. 590068— )

Radio Harness (W34) Wiring Diagram (S.N. 590068— )

Group 15: Sub-System Diagnostics

Starting and Charging Circuit Theory of Operation (S.N. 590068— )

Controller Area Network (CAN) Theory of Operation (S.N. 590068— )

Engine Control Unit (ECU) Circuit Theory of Operation (S.N. 590068— )

Flex Load Controller (FLC) Circuit Theory of Operation (S.N. 590068— )

Transmission Control Unit (TCU) Circuit Theory of Operation (S.N. 590068— )

CAN Monitor Unit (CMU) Circuit Theory of Operation (S.N. 590068— )

Group 20: References

Diagnostic Trouble Codes Quick Reference List (S.N. 590068— 600915)

CAN Monitor Unit (CMU) Diagnostic Trouble Codes (S.N. 590068— 600915)

Flex Load Controller (FLC) Diagnostic Trouble Codes (S.N. 590068— 600915)

Sealed Switch Module (SSM) Diagnostic Trouble Codes (S.N. 590068— 600915)

Transmission Control Unit (TCU) Diagnostic Trouble Codes (S.N. 590068— 600915)

Engine Control Unit (ECU) Diagnostic Trouble Codes (S.N. 590068— 600915)

Flex Load Controller (FLC) Fault Exceptions (S.N. 590068— )

CAN Circuit Testing

Check Battery Electrolyte Level and Terminals (S.N. 590068— )

Procedure For Testing Batteries (S.N. 590068— )

Electrical Component Specifications (S.N. 590068— )

Transmission Control Valve Solenoid Check (S.N. 590068— )

Clutch Cut-Off Sensor Check and Adjustment (S.N. 590068— )

Boom Height Kickout/Return-to-Carry Adjustment (S.N. 590068— )

Return-to-Dig Adjustment (S.N. 590068— )

Sensor Circuitry Check (S.N. 590068— )

Diagnostic Trouble Codes—After Machine Repair (S.N. 590068— )

Change Back-Up Alarm Volume (S.N. 590068— )

Remove and Install Pressure Switches (S.N. 590068— )

Replace METRI-PACK Metri-Pack is a trademark of Packard Electrical. Connectors (S.N. 590068— )

Install METRI-PACK Metri-Pack is a trademark of Packard Electric. Contact (S.N. 590068— )

Replace DEUTSCH DEUTSCH is a trademark of the Deutsch Co. Connectors (S.N. 590068— )

Install DEUTSCH DEUTSCH is a trademark of the Deutsch Co. Contact (S.N. 590068— )

Replace WEATHER PACK WEATHER PACK is a trademark of Packard Electric. Connector (S.N. 590068— )

Install WEATHER PACK WEATHER PACK is a trademark of Packard Electric. Contact (S.N. 590068— )

Replace CINCH CINCH is a trademark of the Cinch Co. Connectors (S.N. 590068— )

Install CINCH CINCH is a trademark of the Cinch Co. Contact (S.N. 590068— )

Repair 32 and 48 Way CINCH™ Connectors (S.N. 590068— )

Remove Connector Body from Blade Terminals

Engine Control Unit (ECU) Remove and Install (S.N. 590068— )

Flex Load Controller (FLC) Remove and Install (S.N. 590068— )

Transmission Control Unit (TCU) Remove and Install (S.N. 590068— )

Sealed Switch Module (SSM) Remove and Install (S.N. 590068— )

CAN Monitor Unit (CMU) Remove and Install (S.N. 590068— )

Reprogram CAN Monitor Unit (CMU) S.N. 590068—)

Electronic Controller Reconfiguration (S.N. 590068 —)

Section 9015C: Electrical System—644J And 724J (S.N. 600916— )

Group 05: System Information

Electrical Diagram Information (S.N. 590068— )

Group 10: System Diagrams

Fuse and Relay Specifications (S.N. 600916— )

System Functional Schematic, Wiring Diagram and Component Location Legend (S.N. 600916— )

System Functional Schematic and Section Legend (S.N. 600916— )

Loader Frame Harness (W2) Component Location (S.N. 600916— )

Loader Frame Harness (W2) Wiring Diagram (S.N. 600916— )

Load Center Harness (W3) Component Location (S.N. 600916— )

Load Center Harness (W3) Wiring Diagram (S.N. 600916— )

Front Console Harness (W4) Component Location (S.N. 590068— )

Front Console Harness (W4) Wiring Diagram (S.N. 590068— )

Engine Frame Harness (W5) Component Location (S.N. 590068— )

Engine Frame Harness (W5) Wiring Diagram (S.N. 590068— )

Engine Harness (W6) Component Location (S.N. 590068— )

Engine Harness (W6) Wiring Diagram (S.N. 590068— )

Engine Air Heater Harness (W7) Component Location (S.N. 590068— )

Engine Air Heater Harness (W7) Wiring Diagram (S.N. 590068— )

Transmission Harness (W10) Component Location (S.N. 590068— )

Transmission Harness (W10) Wiring Diagram (S.N. 590068— )

Rear Frame Harness (W13) Component Location (S.N. 590068— )

Rear Frame Harness (W13) Wiring Diagram (S.N. 600916— )

Cab Roof Harness (W19) Component Location

Cab Roof Harness (W19) Wiring Diagram

Blower and A/C Harness (W20) Component Location (S.N. 590068— )

Blower and A/C (W20) Wiring Diagram (S.N. 590068— )

Radio Harness (W34) Component Location (S.N. 590068— )

Radio Harness (W34) Wiring Diagram (S.N. 590068— )

Group 15: Sub-System Diagnostics

Starting and Charging Circuit Theory of Operation (S.N. 590068— )

Controller Area Network (CAN) Theory of Operation (S.N. 590068— )

Engine Control Unit (ECU) Circuit Theory of Operation (S.N. 590068— )

Flex Load Controller (FLC) Circuit Theory of Operation (S.N. 590068— )

Transmission Control Unit (TCU) Circuit Theory of Operation (S.N. 590068— )

CAN Monitor Unit (CMU) Circuit Theory of Operation (S.N. 590068— )

Group 20: References

Diagnostic Trouble Codes Quick Reference List (S.N. 600916— )

CAN Monitor Unit (CMU) Diagnostic Trouble Codes (S.N. 600916— )

Flex Load Controller (FLC) Diagnostic Trouble Codes (S.N. 600916— )

Sealed Switch Module (SSM) Diagnostic Trouble Codes (S.N. 600916— )

Transmission Control Unit (TCU) Diagnostic Trouble Codes (S.N. 600916— )

Engine Control Unit (ECU) Diagnostic Trouble Codes (S.N. 600916— )

Flex Load Controller (FLC) Fault Exceptions (S.N. 590068— )

CAN Circuit Testing

Check Battery Electrolyte Level and Terminals (S.N. 590068— )

Procedure For Testing Batteries (S.N. 590068— )

Electrical Component Specifications (S.N. 590068— )

Transmission Control Valve Solenoid Check (S.N. 590068— )

Clutch Cut-Off Sensor Check and Adjustment (S.N. 590068— )

Boom Height Kickout/Return-to-Carry Adjustment (S.N. 590068— )

Return-to-Dig Adjustment (S.N. 590068— )

Sensor Circuitry Check (S.N. 590068— )

Diagnostic Trouble Codes—After Machine Repair (S.N. 590068— )

Change Back-Up Alarm Volume (S.N. 590068— )

Remove and Install Pressure Switches (S.N. 590068— )

Replace METRI-PACK Metri-Pack is a trademark of Packard Electrical. Connectors (S.N. 590068— )

Install METRI-PACK Metri-Pack is a trademark of Packard Electric. Contact (S.N. 590068— )

Replace DEUTSCH DEUTSCH is a trademark of the Deutsch Co. Connectors (S.N. 590068— )

Install DEUTSCH DEUTSCH is a trademark of the Deutsch Co. Contact (S.N. 590068— )

Replace WEATHER PACK WEATHER PACK is a trademark of Packard Electric. Connector (S.N. 590068— )

Install WEATHER PACK WEATHER PACK is a trademark of Packard Electric. Contact (S.N. 590068— )

Replace CINCH CINCH is a trademark of the Cinch Co. Connectors (S.N. 590068— )

Install CINCH CINCH is a trademark of the Cinch Co. Contact (S.N. 590068— )

Repair 32 and 48 Way CINCH™ Connectors (S.N. 590068— )

Remove Connector Body from Blade Terminals

Engine Control Unit (ECU) Remove and Install (S.N. 590068— )

Flex Load Controller (FLC) Remove and Install (S.N. 590068— )

Transmission Control Unit (TCU) Remove and Install (S.N. 590068— )

Sealed Switch Module (SSM) Remove and Install (S.N. 590068— )

CAN Monitor Unit (CMU) Remove and Install (S.N. 590068— )

Reprogram CAN Monitor Unit (CMU) S.N. 590068—)

Electronic Controller Reconfiguration (S.N. 590068 —)

Section 9020: Power Train

Group 05: Theory Of Operation

TEAMMATE TEAMMATE is a trademark of Deere & Company Axles

Transmission Clutch Engagement And Solenoids Activated

Power Train Components

Transmission Operation

Transmission Operation—First Gear Forward

Transmission Control Valve Components

Transmission Clutch Modulation

Thermal Bypass Valve Operation

Axle Circulation Motor and Dual Pumps

Park Brake Operation

Group 15: Diagnostic Information

Transmission System Schematic—First Forward

Power Train Component Location

Diagnose Transmission System Malfunctions

Diagnose Differential And Axle Malfunctions

Diagnose Service Brake Malfunctions

Diagnose Drive Line Malfunctions

Diagnose Park Brake Malfunctions

Group 20: Adjustments

External Service Brake Inspection

Transmission Control Unit (TCU)—Electronic Clutch Adjustment (S.N. —590067)

Transmission Control Unit (TCU)—Electronic Clutch Calibration (S.N. 590068— )

Group 25: Tests

Transmission Oil Warm-Up Procedure

Driveline Bearing—Park Brake Pressure Test

Driveline Bearing—Park Brake Drag Test

Transmission Pump Flow Test

Transmission System Pressure Test

Transmission Clutch Pressure Test

Transmission Element Leakage Test

Lube Pressure Test

Differential Lock Pressure Test

Converter—In Pressure Test

Converter—Out Pressure Test

Converter Relief Pressure Test

Converter—Out Flow Test

Torque Converter Stall Speed Test

Transmission Oil Cooler Thermal Bypass Valve Temperature Test

Transmission Oil Cooler Thermal Bypass Valve Pressure Test

Transmission Oil Cooler Restriction Test

Axle Circulation Dual Pump Flow and Temperature Tests

Axle Circulation Motor Flow Test

Axle Breather Test

Axle Circulation Pump Inlet Suction Check

Section 9025: Hydraulic System

Group 05: Theory Of Operation

Loader Hydraulic System

Hydraulic Pump Operation

Hydraulic Pump Control

Hydraulic Pump Control—Neutral

Hydraulic Pump Control—Function Metering

Hydraulic Pump Control—Full Flow

Hydraulic Pump Control—Function Bottomed

Fan Drive Operation

Steering System Components

Steering Valve Operation

Secondary Steering Inlet Manifold Operation

Secondary Steering System Operation

Pressure Reducing Valve—Boom Raise Operation (S.N. —590067)

Pressure Reducing Valve—Boom Down—Engine Running Operation (S.N. —590067)

Pressure Reducing Valve—Boom Down—Engine OFF Operation (S.N. —590067)

Pressure Reducing Valve Operation (S.N. 590068— )

Service Brake Hydraulic System

Service Brake Accumulator

Service Brake Valve

Pin and Axle Disconnect Operation

Pilot Control Lever Operation (S.N. —590067)

Pilot Control Lever Operation (S.N. 590068— )

Pilot Orifice Check Valve For Control Valve Sections

Loader Control Valve

Boom Section—Boom Down And Steering

Boom Section—Boom Raise And Bucket Dump

Bucket Section—Boom Raise and Bucket Dump

Auxiliary Section—Operating And Boom Raise

Auxiliary Sections—Stroke Adjusters

Bucket Section Operation—Tool Carrier

Outlet Section Operation

Load Sense Circuit—Steering

Load Sense Circuit—Steering And Boom Down

Load Sense Circuit—Boom Raise And Bucket Dump

Load Sense Relief Valve Operation

Relief Valve Operation

Circuit Relief Valve Operation

Anti-Cavitation Valve Operation

Return Filter Operation

Ride Control Operation

Group 15: Diagnostic Information

Hydraulic Circuit Symbols

Hydraulic System Schematics

Hydraulic System Component Location

Diagnose Hydraulic System Malfunctions

Group 20: Adjustments

Hydraulic Oil Clean-Up Procedure Using Portable Filter Caddy

Return-To-Dig Adjustment

Return-To-Carry and Boom Height Kickout Adjustment

Pump Load Sense Differential and Standby Pressure Adjustment

Ride Control Accumulator Discharge Procedure—If Equipped

Ride Control Accumulator Gas Charge Procedure—If Equipped

Ride Control Accumulator Draining Procedure

Auxiliary Valve Section—Stroke Adjustment

Group 25: Test

Hydraulic Oil Warm-Up Procedure

JT02156A Digital Pressure and Temperature Analyzer Kit Installation

Fan Pump Pressure Test

Fan Motor Speed Test

Fan Pump Flow Test

Fan Motor Case Drain Test

Pump Load Sense Differential And Standby Pressure Test

Maximum System Pressure Test

Hydraulic Pump Flow Test

Hydraulic Pump Case Drain Test

Loader System Relief and Circuit Relief Valve Pressure Test

Loader Cylinder Drift Test

Boom, Bucket and Steering Cylinder Leakage Test

Steering Valve Leakage Test

Steering Valve Drift Test

Secondary Steering Pump Relief Valve Pressure Test

Secondary Steering Manifold Primary Check Valve Leakage Test

Secondary Steering Manifold Secondary Check Valve Leakage Test

Pilot Control Valve Pressure Test (S.N. —590067)

Pilot Control Valve Pressure Test—Single Lever (S.N. 590068— )

Pilot Control Valve Pressure Test—Two Lever

Pressure Reducing Valve Pressure Test

Cycle Time Test

Brake Accumulator Precharge Test

Boom Down Accumulator Precharge Test (S.N. 590068— )

Brake Valve Pressure Test

Brake Valve Leakage Test

Brake Accumulator Inlet Check Valve Leakage Test

Axle And Pin Disconnect Pressure Test

Hydraulic Oil Filter Inspection Procedure

Section 9031: Heating And A/C

Group 05: Theory Of Operation

Air Conditioning System Cycle Of Operation

Group 15: Diagnostic Information

Diagnose Air Conditioning System Malfunctions

Diagnose Heater System Malfunctions

Group 25: Tests

Air Conditioning System Fittings Reference Chart

Proper Refrigerant Handling

R134a Refrigerant Cautions

Refrigerant Hoses And Tubing Inspection

R134a Air Conditioning System Test

Operating Pressure Diagnostic Chart

Low Pressure Switch Test (S.N. —590067)

High Pressure Switch Test (S.N. —590067)

A/C Binary Pressure Switch Test (S.N. 590068— )

Freeze Control Switch

Leak Testing

John Deere 4WD Loaders 644J, 724J Operation and Test Service Manual (TM2075)