Complete Operation and Test manual with electrical wiring diagrams for John Deere 344J 4WD Loader (S.N. 22914— ), with all the shop information to maintain, diagnose, and rebuild 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.

TM11218 - John Deere 4WD Loader Model 344J Technical Manual - Operation and Test.PDF
TM11218 - John Deere 4WD Loader Model 344J Technical Manual - Operation and Test.EPUB

Total Pages: 890 pages
File Format: PDF (bookmarked, ToC, Searchable, Printable, high quality) & EPUB/MOBI/AZW for Kindle/iPad/iPhone/Android.
Language: English

MAIN SECTIONS
   Foreword
   Technical Information Feedback Form
   General Information
      Safety Information
   Diagnostic Trouble Codes (DTC)
      Engine Control Unit (ECU) Diagnostic Trouble Codes
      Chassis Control Unit (CCU) Diagnostic Trouble Codes
   Operational Checkout Procedure
      Operational Checkout Procedure
   Engine
      Theory of Operation
      Diagnostic Information
      Tests
   Electrical System
      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 Air Conditioning
      Theory of Operation
      Diagnostic Information
      Tests

tm11218 - 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

Avoid High-Pressure Fluids

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 Worksite 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 Tires Safely

Service Cooling System Safely

Remove Paint Before Welding or Heating

Make Welding Repairs Safely

Drive Metal Pins Safely

Section 9001: Diagnostic Trouble Codes (DTC)

Group 10: Engine Control Unit (ECU) Diagnostic Trouble Codes

Engine Control Unit (ECU) Diagnostic Trouble Codes

000029.03 - Throttle #2 Voltage Out of Range High

000029.04 - Throttle #2 Voltage Out of Range Low

000029.13 - Throttle #2 Voltage Out of Range Low or High

000091.03 - Throttle #1 Voltage Out of Range High

000091.04 - Throttle #1 Voltage Out of Range Low

000091.13 - Throttle #1 Voltage Out of Range Low or High

000091.14 - Throttle Voltage Mismatch

000190.00 - Engine Speed High—Most Severe Level

000627.18 - Battery Voltage Low—Moderately Severe Level

000676.03 - Glow Plug Relay Short to Power

000676.04 - Glow Plug Relay Open or Short to Ground

000970.31 - CAN Message Requesting Engine Shutdown

Group 20: Chassis Control Unit (CCU) Diagnostic Trouble Codes

Chassis Control Unit (CCU) Diagnostic Trouble Codes

000100.01 (E6004) - Engine Oil Pressure Low

000100.01 (E6025) - Engine Oil Pressure Extremely Low

000111.01 (E6008) - Engine Coolant Level Low

000167.02 (E6016) - Alternator Not Supplying Power

000168.16 (E6009) - Battery Voltage High

000168.18 (E600A) - Battery Voltage Low

000174.00 (E6022) - Fuel Temperature Exceeds Safety Threshold

000190.02 (E601E) - Alternator Signal Mismatch

000246.12 (EB01D) - CCU Memory Error

000246.31 - CCU Memory Error

000251.14 - Time Was Changed in CCU

000444.01 (E6026) - Battery Voltage Low With Engine Running

000629.12 - CCU Hardware or Software Malfunction

000629.14 (EB017) - CCU Proper Shutdown

000702.04 (E406C) - Fourth Function Hydraulics Solenoid #1 Open Circuit

000702.06 (E406B) - Fourth Function Hydraulics Solenoid #1 Short to Ground

000703.05 (E406E) - Fourth Function Hydraulics Solenoid #2 Open Circuit

000703.06 (E406D) - Fourth Function Hydraulics Solenoid #2 Short to Ground

000705.12 (EB011) - CCU Internal Malfunction

000706.14 (EB02E) - CAN Error

000706.31 (EB030) - CAN Error

000707.14 (EB02F) - CAN Error

000707.31 (EB031) - CAN Error

000708.12 (EB034) - CAN Error

000746.05 (E406A) - Differential Lock Solenoid Open Circuit

000746.06 (E4069) - Differential Lock Solenoid Short to Ground

000785.05 (E4003) - Pilot Enable Solenoid Open Circuit

000785.06 (E4002) - Pilot Enable Solenoid Short to Ground

000829.03 (E300C) - Fuel Level Sensor Short to Power

000829.04 (E300B) - Fuel Level Sensor Open or Short to Ground

001071.05 (E400B) - Fan Motor Solenoid Open Circuit

001071.06 (E400A) - Fan Motor Solenoid Short to Ground

001638.00 (E2013) - Hydraulic Oil Temperature High

001638.04 (E3010) - Hydraulic Oil Temperature Sensor Short to Ground

001638.05 (E3011) - Hydraulic Oil Temperature Sensor Open Circuit

002000.12 (EA02F) - CAN Communication Lost for ECU

002023.09 (A005) - CAN Communication Lost for Monitor

002630.00 (E6001) - Manifold Air Temperature High

002630.00 (E6020) - Manifold Air Temperature Exceeds Safety Threshold

002858.02 (EB01B) - CCU Memory Error

004076.00 (E601F) - Coolant Temperature Exceeds Safety Threshold

298935.03 (EB010) - CCU Internal Malfunction

298936.03 (E5050) - Forward and Reverse Solenoid Circuits Mismatch

299621.02 - CCU Memory Error

299621.12 (EB01F) - CCU Memory Error

522373.14 (EB012) - CCU Internal Malfunction

522379.05 (E4001) - Park Brake Release Solenoid Open Circuit

522379.06 (E4000) - Park Brake Release Solenoid Short to Ground

522383.05 (E4025) - Reverse Travel Solenoid Open Circuit

522383.06 (E4024) - Reverse Travel Solenoid Short to Ground

522386.05 (E4023) - Forward Travel Solenoid Open Circuit

522386.06 (E4022) - Forward Travel Solenoid Short to Ground

522399.05 (E4066) - LO/HI Speed Solenoid Open Circuit

522399.06 (E4065) - LO/HI Speed Solenoid Short to Ground

522401.03 (E303B) - Ground Speed Sensor Short to Power

522401.04 (E3014) - Ground Speed Sensor Short to Ground

522401.05 (E3015) - Ground Speed Sensor Open Circuit

522411.12 (E5035) - Forward, Neutral, Reverse Switch Signal Mismatch

522429.01 (E2001) - Engine ON, Steering System Pressure Switch Open

522429.03 (E2003) - Secondary Steering System Pressure Switch Closed With No Check

522429.04 (E3001) - Steering System Pressure Switch Short to Ground

522475.14 (EB036) - Valid Access Code Entered

522477.01 (E6006) - Engine Air Filter Restricted

522478.14 (E204C) - Service Hours Changed

522976.14 (EB037) - CCU Software Updated

523137.01 (E2002) - Secondary Steering Pump Check Failed

523137.03 (E2000) - Engine OFF, Steering System Pressure Switch Closed

523137.04 (E3000) - Secondary Steering System Pressure Switch Short to Ground

523216.05 (EB00C) - CCU Sensor 4 Voltage Low

523217.05 (EB00B) - CCU Sensor 3 Voltage Low

523218.05 (EB00A) - CCU Sensor 2 Voltage Low

523310.02 (EB01C) - CCU Memory Error

523310.13 (EB018) - CCU Memory Error

523572.31 (EB016) - CCU Improper Shutdown

523577.05 (E4067) - Secondary Steering Relay Open or Short to Ground

523706.12 (EB000) - CCU Internal Malfunction

523773.02 (EB013) - CAN1 Abnormal Error Rate

523777.14 (E204D) - Secondary Steering Was Activated

524055.02 (EB00D) - CCU Internal Malfunction

524189.19 (EB015) - CCU Memory Error

524201.12 (A025) - Monitor Display Internal Error

524215.02 (EB014) - CAN2 Abnormal Error Rate

524232.01 (E2016) - Brake Accumulator Pressure Low

524232.31 (E204F) - Park Brake Pressure Switch Signal Mismatch

524323.04 (E3002) - Brake Accumulator Pressure Switch Short to Ground

524277.14 (E5066) - Drive Shaft Overspeed

(E601C) - Calculation Error, Engine

(E601D) - Calculation Error, Engine

Section 9005: Operational Checkout Procedure

Group 10: Operational Checkout Procedure

Operational Checkout

Section 9010: Engine

Group 05: Theory of Operation

PowerTech E™ 4.5 L John Deere Engine

Group 15: Diagnostic Information

PowerTech E™ 4.5 L John Deere Engine

Engine Cooling System Component Location

Engine Fuel System Component Location

Engine Intake and Exhaust Component Location

Group 25: Tests

PowerTech E™ 4.5 L John Deere Engine

Engine Idle Speeds Check

Intake Manifold Pressure Test—Turbocharger Boost

Section 9015: Electrical System

Group 05: System Information

Electrical Diagram Information

Electrical Schematic Symbols

Group 10: System Diagrams

Fuse and Relay Specifications

System Functional Schematic, Wiring Diagram, and Component Location Master Legend

System Functional Schematic and Section Legend

Batteries and Power Cables (W5) Component Location

Engine Harness (W6) Component Location

Engine Harness (W6) Wiring Diagram

Loader/Rear Frame Harness (W7) Component Location

Loader/Rear Frame Harness (W7) Wiring Diagram

Cab Main Harness (W8) Component Location

Cab Main Harness (W8) Wiring Diagram

Cab Roof Harness (W9) Component Location

Cab Roof Harness (W9) Wiring Diagram

Rear Lights Harness (W10) Component Location

Rear Lights Harness (W10) Wiring Diagram

Air Conditioning Thermostat and Blower Harness (W11) Component Location

Air Conditioning Thermostat and Blower Harness (W11) Wiring Diagram

Air Conditioning Harness (W12) Component Location

Air Conditioning Harness (W12) Wiring Diagram

Fourth Function Harness (W13) Component Location

Fourth Function Harness (W13) Wiring Diagram

Ride Control Harness (W14) Component Location

Ride Control Harness (W14) Wiring Diagram

Start Aid Harness (W15) Component Location

Start Aid Harness (W15) Wiring Diagram

Group 15: Sub-System Diagnostics

Power Circuit Theory of Operation

Start and Charge Circuits Theory of Operation

Controller Area Network (CAN) Theory of Operation

Engine Control Unit (ECU) Circuits Theory of Operation

Chassis Control Unit (CCU) Circuits Theory of Operation

Monitor Display Circuit Theory of Operation

Forward, Reverse, LO/HI Speed, and Backup Alarm Circuits Theory of Operation

Park Brake Release Circuit Theory of Operation

Pilot Enable, Return-to-Dig, and Boom Float Circuits Theory of Operation

Ride Control Circuit Theory of Operation

Differential Lock Circuit Theory of Operation

Hydraulic Fan Circuit Theory of Operation

Fourth Function Circuit Theory of Operation

Hazard and Turn Lights Circuits Theory of Operation

Secondary Steering Circuit Theory of Operation

Quick Disconnect Circuit Theory of Operation

Group 20: References

Electrical Component Specifications

Service ADVISOR™ Diagnostic Application

Service ADVISOR™ Connection Procedure

Reading Diagnostic Trouble Codes with Service ADVISOR™ Diagnostic Application

Controller Payload Download

Controller Payload Update

Tuple Error Correction—Service ADVISOR™ Connection

Chassis Control Unit (CCU) Configuration Test

Alternator Test

CAN Circuit Test

Wire Harness Test

Engine Speed Control Pedal Sensor Test

Sensor Circuit Check

Monitor Display Remove and Install

Chassis Control Unit (CCU) Remove and Install

Engine Control Unit (ECU) Remove and Install

Ground Speed Sensor Install

Return-to-Dig (RTD) Adjustment

Intermittent Diagnostic Trouble Code (DTC) Diagnostics

Connector Terminal Test

Replace Metri-Pack® (Push Type) Connectors

Replace Metri-Pack® Connectors

Replace DEUTSCH® Circular Connectors

Replace DEUTSCH® Rectangular or Triangular Connectors

Install DEUTSCH® Contact

Replace WEATHER PACK® Connector

Install WEATHER PACK® Contact

Replace CINCH™ Connectors

Install CINCH™ Contact

Repair 32 and 48 Way CINCH™ Connectors

Remove Connector Body from Blade Terminals

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

Group 15: Diagnostic Information

Machine Does Not Move

Machine Does Not Move at 1000—1100 RPM

Machine Moves in One Direction Only

Machine Drives Erratically

Machine Moves in Wrong Direction

Cannot Find or Hold Neutral

Hydraulic Oil Overheats (Machine Shifts to Low Speed Automatically)

Slow Acceleration—Fast Deceleration

Lack of Power or Sluggish

Foaming Oil

Machine Vibrates

Differential Low on Oil

Excessive Differential and/or Axle Noise

Oil Seeping From Outer Axle Seal

Axle Overheats

Excessive Driveline Vibration or Noise

Park Brake Will Not Hold

Park Brake Overheats

Park Brake Indicator in Monitor Does Not Come ON When Park Brake Applied

Park Brake Will Not Apply

Park Brake Will Not Release

Poor or No Service Brakes

Service Brakes Aggressive

Service Brakes Dragging

Service Brakes Chatter

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

Section 9025: Hydraulic System

Group 05: Theory of Operation

Hydraulic System Operation

Hydraulic Pump Operation

Hydraulic Fan Operation

Orbital Steering System Component Operation

Orbital 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 Enable Solenoid Valve Operation

Group 15: Diagnostic Information

Hydraulic System Schematic

Orbital Steering System Schematic

No Hydraulic Functions

Slow Hydraulic Functions

Noisy Hydraulic Pumps

Boom Float Function Does Not Work

One Hydraulic Function Does Not Work

Low Hydraulic Power

Function Drifts Down

Boom Down Does Not Work (Engine Off)

Oil Overheats

Function Drops Before Rising When Valve Is Activated

Hydraulic Oil Foams

No Steering Functions

Constant Steering to Maintain Straight Travel

No Steering Function During Slow Steering Wheel Movement

Steering Wheel Turns With No Resistance and Causes No Frame Movement

Erratic Steering

Spongy or Soft Steering

Free Play at Steering Wheel

Steering Wheel Does Not Immediately Return to Neutral When Released

Orbital Steering Valve Locks Up

Abrupt Steering Wheel Oscillation

Steering Wheel Turns by Itself

Machine Turns in Opposite Direction

Machine Turns When Orbital Steering Valve Is in Neutral

Steering Wheel Kickback

Secondary Steering Does Not Work

Secondary Steering Motor Operates, but Machine Does Not Have Power Steering

Secondary Steering Function Slow

Hydraulic Fan Does Not Reach Full Speed

Hydraulic Fan Runs at Full Speed Only

Hydraulic Fan Does Not Spin

Loader System Component Location

Loader Auxiliary Systems Component Location

Orbital Steering System Component Location

Group 20: Adjustments

Steering Alignment Adjustment

Ride Control Accumulator Check and Charge Procedure

Group 25: Test

Hydraulic Oil Warm-Up Procedure

Hydraulic System Pressure and Accumulators Discharge Procedure

Digital Pressure and Temperature Analyzer Installation

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

Hydraulic Fan Motor Speed Test

Hydraulic Fan Pump Pressure and Flow Test

Section 9031: Heating and Air Conditioning

Group 05: Theory of Operation

Air Conditioning System Cycle of Operation

Group 15: Diagnostic Information

Air Conditioning System Does Not Operate

Air Conditioner Does Not Cool Interior of Cab

Air Conditioner Runs Constantly, Too Cold

Heater System Does Not Operate

Heater Does Not Warm Interior of Cab

Interior Windows Continue to Fog

Air Conditioner and Heater Component Location

Group 25: Tests

Refrigerant Cautions and Proper Handling

Refrigerant Leak Test

Air Conditioner Compressor Clutch Test

Air Conditioner Binary Pressure Switch Test

Air Conditioner Freeze Control Switch Test

R134a Air Conditioning System Test

Operating Pressure Diagnostic Chart

John Deere 4WD Loader Model 344J Operation and Test Service Manual (TM11218)