Complete service Operation and Test manual with Electrical Wiring Diagrams for John Deere 344J 4WD Loader (SN. before 22913), with workshop information to maintain, diagnose, and service like professional mechanics.

John Deere 4WD Loader Model 344J workshop Operation and Test 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.

TM2326 - John Deere 4WD Loader Model 344J Technical Manual - Operation and Test.PDF
TM2326 - John Deere 4WD Loader Model 344J Technical Manual - Operation and Test.EPUB

Total Pages: 530 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
      Adjustments
      Tests
   Electrical System
      System Information
      System Diagrams
      Sub-System Diagnostics
      References
      Tests and Adjustments
   Power Train
      Theory Of Operation
      Diagnostic Information
      Adjustments
      Tests
   Hydraulic System
      Theory of Operation
      Diagnostic Information
      Adjustments
      Test
   Heating and Air Conditioning
      Theory of Operation
      Diagnostic Information
      Tests

tm2326 - 344J 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

Operational Checkout

Section 9010: Engine

Group 05: Theory of Operation

POWERTECH 4.5 L (4045) John Deere Engines

Group 15: Diagnostic Information

Diagnose Observable Engine Symptoms

Group 20: Adjustments

JT05801 Clamp-On Electronic Tachometer Installation

Speed Control Linkage Adjustment

Engine Speed Test and Adjustment

Injection Pump Static Timing Adjustment

Group 25: Tests

JT05800 Digital Thermometer Installation

Air Intake System Leakage Test

Injection Pump Timing Test

Intake Manifold Pressure Test—Turbocharger Boost

Fuel Line Leakage Test

Section 9015: Electrical System

Group 05: System Information

Electrical Diagram Information

Component Identification Table

Fuse (Blade-Type) Color Codes

Group 10: System Diagrams

Fuse and Relay Specifications

System Functional Schematic, Wiring Diagrams, and Component Locations Master Legend

System Functional Section Legend

System Functional Schematic (Circuits SE1—SE3)

System Functional Schematic (Circuits SE4—SE6)

System Functional Schematic (Circuits SE7—SE9)

System Functional Schematic (Circuits SE10—SE12)

System Functional Schematic (Circuits SE13—SE15)

System Functional Schematic (Circuits SE16—SE18)

System Functional Schematic (Circuits SE19—SE21)

System Functional Schematic (Circuits SE22—SE24)

System Functional Schematic (Circuits SE25—SE27)

System Functional Schematic (Circuits SE28—SE30)

System Functional Schematic (Circuits SE31—SE33)

System Functional Schematic (Circuits SE34—SE35)

Batteries and Power Cables (W5) Component Location

Loader/Rear Frame Harness (W6) Component Location

Loader/Rear Frame Harness (W6) Wiring Diagram

Cab Main Harness (W7) Component Location

Cab Main Harness (W7) Wiring Diagram

Cab Roof Harness (W8) Component Location

Cab Roof Harness (W8) Wiring Diagram

Rear Lights Harness (W9) Component Location

Rear Lights Harness (W9) Wiring Diagram

Air Conditioning Thermostat and Blower Harness (W10) Component Location

Air Conditioning Thermostat and Blower Harness (W10) Wiring Diagram

Air Conditioning Harness (W11) Component Location

Air Conditioning Harness (W11) Wiring Diagram

Fourth Function Harness (W12) Component Location

Fourth Function Harness (W12) Wiring Diagram

Ride Control Harness (W13) Component Location

Ride Control Harness (W13) Wiring Diagram

Group 15: Sub-System Diagnostics

Power Circuit Theory of Operation

Start Circuit Theory of Operation

Charge and Start Release Circuits Theory of Operation

Forward, Reverse, and Back-Up Alarm Circuits Theory of Operation

Park Brake Release Circuit Theory of Operation

Differential Lock Circuit Theory of Operation

Cooling Fan Drive Circuit Theory of Operation

Chassis Control Unit and Input/Output Circuits Theory of Operation

Secondary Steering Circuit Theory of Operation

Quick Disconnect Circuit Theory of Operation

Group 20: References

POWERTECH 4.5 L (4045) John Deere Engines

Diagnostic Trouble Codes Quick Reference List

Diagnostic Trouble Code Diagnostics

Controller Payload Download

Controller Payload Update

Chassis Control Unit (CCU) Configuration Test

Electrical Component Specifications

Monitor Display Remove and Install

Chassis Control Unit Remove and Install

Ground Speed Sensor Install

Servicing Connectors

Group 25: Tests and Adjustments

Return-to-Dig Adjustment

Section 9020: Power Train

Group 05: Theory Of Operation

Power Train Description

Hydrostatic Transmission Operation—Neutral

Hydrostatic Transmission Operation—Forward (Low Speed)

Hydrostatic Transmission Operation—Forward (High Speed)

Hydrostatic Transmission Operation—Reverse (Low Speed)

Hydrostatic Pump Operation

Hydrostatic Pump Swash Plate Operation

Hydrostatic Pump Control Operation—Reverse (Engine Speed at Less than Fast Idle)

Hydrostatic Pump Control Operation—Forward (Engine Speed at Fast Idle)

High Pressure Relief Valve Operation

Hydrostatic Motor Operation—Neutral

Hydrostatic Motor Operation—Reverse (Low Speed)

Hydrostatic Motor Operation—Forward (High Speed)

Inching Valve Operation

Brake Valve Operation

Service and Park Brake Operation

Park Brake Release Solenoid Valve Operation

Park Brake, Service Brake, and Differential Lock Operation

Cooling Fan Pump and Motor Circuit Operation

Group 15: Diagnostic Information

Diagnose Hydrostatic Transmission Malfunctions

Diagnose Differential and Axle Malfunctions

Diagnose Driveline Malfunctions

Diagnose Park Brake Malfunctions

Diagnose Service Brake Malfunctions

Diagnose Hydraulic Cooling Fan Malfunctions

Hydraulic Circuit Symbols

Power Train Component Location

Service and Park Brake System Component Location

Hydrostatic Transmission Schematic

Service and Park Brake System Schematic

Group 20: Adjustments

Hydrostatic Pump Servo Piston Neutral Adjustment

Hydrostatic Motor Minimum Displacement Adjustment

Brake / Inching Pedal Linkage Adjustment

Group 25: Tests

Before Performing Hydrostatic Transmission Tests

Neutral Charge Relief Valve Pressure Test and Adjustment

Hydrostatic Motor Begin Regulation of Displacement Control Valve Test and Adjustment

Hydrostatic Pump Begin Regulation Test and Adjustment

Hydrostatic Pump Performance (Timing) Test and Adjustment

High Pressure Relief Valve Test and Adjustment

Hydrostatic Pump Pressure Override (POR) Valve Pressure Test and Adjustment

Hydrostatic Pump Isolation Procedure

Directional Control Valve Spool Leakage Test

Hydrostatic Adjusting Screws (With Tamper-Proof Caps)

Park Brake Release Pressure Test

Cooling Fan Motor RPM Test

Cooling Fan System Pressure and Pump Flow Test

Section 9025: Hydraulic System

Group 05: Theory of Operation

Main Hydraulic System Operation

Main Hydraulic Pump Operation

Steering Circuit Operation

Steering Valve Operation

Steering Cylinder Relief Valve Operation

Secondary Steering System Operation

Loader Control Valve Operation

Loader Circuit Relief Valve Operation

Ride Control Valve Operation

Pilot Control Valve Operation

Pilot Lockout Solenoid Valve Operation

Group 15: Diagnostic Information

Diagnose Hydraulic System Malfunctions

Hydraulic Circuit Symbols

Loader System Component Location

Loader Auxiliary Systems Component Location

Steering System Component Location

Loader System Schematic

Steering System Schematic

Group 20: Adjustments

Steering Alignment Adjustment

Ride Control Accumulator Check and Charge Procedure

Group 25: Test

Hydraulic Oil Cleanup Procedure Using Portable Filter Caddy

Hydraulic Oil Warm-Up Procedure

Main Hydraulic Pump Flow Test

Orbital Steering System Relief Pressure Test

Steering Cylinder Leakage Test

Secondary Steering Pump Relief Valve Pressure Test

Secondary Steering Primary Check Valve Leakage Test

Secondary Steering Check Valve Leakage Test

Loader System / Load Sense Relief Valve Pressure Test

Loader Circuit Relief Valve Pressure Test

Ride Control System Relief Valve Pressure Test

Loader Cylinder Drift Test

Boom and Bucket Cylinder Leakage Test

Pilot Control Valve Pressure Test

Section 9031: Heating and Air Conditioning

Group 05: Theory of Operation

Air Conditioning System Cycle of Operation

Group 15: Diagnostic Information

Diagnose Air Conditioning System Malfunctions

Diagnose Heater System Malfunctions

Air Conditioner and Heater Component Location

Group 25: Tests

Refrigerant Cautions and Proper Handling

Air Conditioner and Heater Operational Checks

Refrigerant Leak Test

Air Conditioner Compressor Clutch Test

Air Conditioner High/Low Pressure Switch Test

AC Thermostat Switch Test

R134a Air Conditioning System Test

Operating Pressure Diagnostic Chart

John Deere 4WD Loader Model 344J Operation and Test Service Manual (TM2326)