Complete service repair manual for John Deere 4WD Loader 844J, with all the shop information to maintain, repair, and rebuild like professional mechanics.

John Deere 4WD Loader 844J workshop service repair 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.
* 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.

TM2307 - John Deere 4WD Loader 844J Technical Manual (Repair).PDF

Total Pages: 816 pages
File Format: PDF (bookmarked, ToC, Searchable, Printable, high quality)
Language: English

MAIN SECTIONS
 Foreword
   General Information
      Safety Information
   Wheels
      Powered Wheels And Fasteners
   Axles And Suspension Systems
      Removal and Installation
      Axle Shafts And U-Joints
      Axle Shaft, Bearings, And Reduction Gears
   Transmission
      Remove and Install
      Gears, Shafts, Bearings and Power Shift Clutch
      Hydraulic System
   Engine
      Removal And Installation
   Engine Auxiliary Systems
      Cooling System
      External Exhaust System
      External Fuel Supply Systems
   Steering System
      Hydraulic System
   Service Brakes
      Hydraulic System
   Park Brake
      Active Elements
      Hydraulic System
   Frame or Supporting Structure
      Frame Installation
      Frame Bottom Guards
      Chassis Weights
   Operator`s Station
      Removal and Installation
      Operator Enclosure
      Seat and Seat Belt
      Heating and Air Conditioning
   Sheet Metal and Styling
      Hood or Engine Enclosure
   Loader
      Bucket
      Frames
      Hydraulic System
   Dealer Fabricated Tools

tm2307 - 844J Loader

Table of Contents

Foreword

Section 00: General Information

Group 0001: 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 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 Cooling System Safely

Remove Paint Before Welding or Heating

Make Welding Repairs Safely

Drive Metal Pins Safely

Group 0003: Torque Values

Metric Bolt and Cap Screw Torque Values

Additional Metric Cap Screw Torque Values

Unified Inch Bolt and Cap Screw Torque Values

Service Recommendations for 37° Flare and 30° Cone Seat Connectors

Service Recommendations for O-Ring Boss Fittings

O-Ring Boss Fittings in Aluminum Housing Service Recommendations—Excavators

Service Recommendations for Flared Connections—Straight or Tapered Threads

Service Recommendations for Flat Face O-Ring Seal Fittings

O-Ring Face Seal Fittings With SAE Inch Hex Nut and Stud End for High-Pressure Service Recommendations

O-Ring Face Seal Fittings With Metric Hex Nut and Stud End for Standard Pressure Service Recommendations

O-Ring Face Seal Fittings With Metric Hex Nut and Stud End for High-Pressure Service Recommendations

Service Recommendations for Metric Series Four Bolt Flange Fitting

Service Recommendations For Inch Series Four Bolt Flange Fittings

Inch Series Four Bolt Flange Fitting for High-Pressure Service Recommendations

Service Recommendations For Non-Restricted Banjo (Adjustable) Fittings

Service Recommendations For O-Ring Boss Fittings With Shoulder

Metric 24° O-Ring Seal DIN 20078 Service Recommendations

Section 01: Wheels

Group 0110: Powered Wheels And Fasteners

Wheel Remove and Install

Tire Remove and Install

Section 02: Axles And Suspension Systems

Group 0200: Removal and Installation

Front Axle Remove and Install

Rear Axle Remove and Install

Axle Oscillating Supports Disassemble and Assemble

Oscillating Support Wear Bushing Remove and Install

Group 0225: Axle Shafts And U-Joints

Universal Joint and Drive Shaft Remove and Install

Group 0250: Axle Shaft, Bearings, And Reduction Gears

Axle Planetary Gear Case Disassemble and Assemble

Differential Disassemble and Assemble

Section 03: Transmission

Group 0300: Remove and Install

Transmission Remove and Install

Group 0350: Gears, Shafts, Bearings and Power Shift Clutch

Torque Converter Input Shaft Remove and Install

Torque Converter and Housing Disassemble and Assemble

Transmission Drive One Remove and Install

Transmission Drive One Disassemble and Assemble

Transmission Drive Two Disassemble and Assemble

Transmission Drive Three Disassemble and Assemble

Secondary Steering Drive Disassemble and Assemble

Output Shaft Drive Disassemble and Assemble

Clutch Packs Remove and Install

Low Range Forward Clutch (KV) and First Speed Clutch (K1) Disassemble and Assemble

High Range Forward Clutch (K4) and Third Speed Clutch (K3) Disassemble and Assemble

Reverse Clutch (KR) and Second Speed Clutch (K2) Disassemble and Assemble

Low Range Forward Clutch (KV) and First Speed Clutch (K1) Bearing Preload Adjustment

High Range Forward Clutch (K4) and Third Speed Clutch (K3) Bearing Preload Adjustment

Reverse Clutch (KR) and Second Speed Clutch (K2) Bearing Preload Adjustment

Group 0360: Hydraulic System

Transmission Oil Pump Remove and Install

Transmission Oil Pump Disassemble and Assemble

Transmission Control Valve Remove and Install

Transmission Control Valve Disassemble and Assemble

Transmission Suction Screen Remove and Install

Section 04: Engine

Group 0400: Removal And Installation

POWERTECH POWERTECH is a trademark of Deere & Company 12.5 L (6125) John Deere Engines

Engine Remove and Install

Section 05: Engine Auxiliary Systems

Group 0510: Cooling System

Serpentine Belt Remove and Install

Charge Air Cooler Remove and Install

Radiator Remove and Install

Axle Oil Cooler Remove and Install

Hydraulic Oil Cooler Remove and Install

Transmission Oil Cooler Remove and Install

Cooling Package Plenum Remove and Install

Group 0530: External Exhaust System

Muffler Remove and Install

Group 0560: External Fuel Supply Systems

Fuel Tank and Fuel Tank Bottom Guard Remove and Install

Section 09: Steering System

Group 0960: Hydraulic System

Orbital Steering Valve Remove and Install

Orbital Steering Priority Valve Remove and Install

Orbital Steering Priority Valve Disassemble and Assemble

Joystick Steering Valve Remove and Install

Joystick Steering Valve Disassemble and Assemble

Steering Column Remove and Install

Steering Cylinder Remove and Install (S.N. —612719)

Steering Cylinder and Frame Bushings Remove and Instal (S.N. —612719)

Steering Cylinder Remove and Install (S.N. 612720— )

Steering Cylinder and Frame Bushings Remove and Install (S.N. 612720— )

Steering Cylinder Disassemble and Assemble

Secondary Steering Pump Remove and Install

Secondary Steering Manifold Remove and Install

Secondary Steering Manifold Disassemble and Assemble

Loader Start-Up Procedure

Section 10: Service Brakes

Group 1060: Hydraulic System

Brake Valve Remove and Install

Brake Accumulator Remove and Install

Section 11: Park Brake

Group 1111: Active Elements

Park Brake Remove and Install

Park Brake Disassemble and Assemble

Group 1160: Hydraulic System

Park Brake Release Solenoid Valve Remove and Install

Park Brake Pressure Switch Remove and Install

Section 17: Frame or Supporting Structure

Group 1740: Frame Installation

Welding Repair of Major Structure

Separate Engine and Loader Frame

Upper Pivot Bearing and Seals Remove and Install

Lower Pivot Bearing and Seals Remove and Install

Group 1746: Frame Bottom Guards

Transmission Bottom Guard Remove and Install

Group 1749: Chassis Weights

Counterweights Remove and Install

Section 18: Operator's Station

Group 1800: Removal and Installation

Cab Remove and Install

Group 1810: Operator Enclosure

Windowpanes Remove and Install

Cab Door Hold-Open Release Adjust

Front and Rear Windshield Wiper Remove and Install

Rivet Nut Installation

Group 1821: Seat and Seat Belt

Seat Remove and Install

Seat Belt Remove and Install

Joystick Armrest and Wiring Harness Remove and Install

Joystick Controller Assembly Remove and Install

Steering Joystick Disassemble and Assemble

Armrest Disassemble and Assemble

Tilt Pivot Disassemble and Assemble

Rear Pivot Tightening

Group 1830: Heating and Air Conditioning

Air Conditioning System Fittings Reference Chart

R134a Refrigerant Cautions and Proper Handling

Flush and Purge Air Conditioner System

R134a Refrigerant Oil Information

R134a Refrigerant Recovery/Recycling and Charging Station Installation Procedure

Recover R134a Refrigerant

Evacuate R134a System

Charge R134a System

Compressor Remove and Install

Compressor Clutch—R134a Disassemble and Assemble

Check Clutch Hub Clearance—R134a

Condenser Remove and Install

Receiver/Dryer Remove and Install

Heater and Air Conditioner Remove and Install

Heater/Evaporator Coil Remove and Install

Expansion Valve Remove and Install

Freeze Control Switch Remove and Install

Heater Control Valve Remove and Install

Heater Control Valve Leak Check

Main Blower Assembly Remove and Install

Pressurizer Motor Assembly Remove and Install

Section 19: Sheet Metal and Styling

Group 1910: Hood or Engine Enclosure

Hood Remove and Install

Rear Hood Remove and Install

Engine Side Shields Remove and Install

Section 31: Loader

Group 3102: Bucket

Bucket Remove and Install

Welded Bucket Cutting Edges Remove and Install

Bolt On Bucket Cutting Edge and Bucket Guard Remove and Install

Cracked Cutting Edge Repair

Bucket Teeth with Segmented Cutting Edge Remove and Install

Bucket Wear Plate Remove and Install

Bucket Spill Guard Remove and Install

Rock Bucket Disassemble and Assemble

Rock Kicker Remove and Install

Group 3140: Frames

NeverGrease™ Pin Joints

Bucket Tilt Linkage Remove and Install

Bucket Linkage Seals and Bushings Remove and Install

Boom Remove and Install

Boom Bushings and Seals Remove and Install

Group 3160: Hydraulic System

Hydraulic Pump Start-Up Procedure

Hydraulic Pump 1 Remove and Install

Hydraulic Pump 2 Remove and Install

Hydraulic Pump 3 Remove and Install

Hydraulic Pump 1, 2 and 3 Disassemble and Assemble

Loader Control Valve Remove and Install

Loader Control Valve Disassemble and Assemble

Auxiliary Valve Section and Bucket Valve Section Disassemble and Assemble

Boom Section Disassemble and Assemble

System Relief Valve Disassemble and Assemble

Circuit Relief Valve Disassemble and Assemble

Service Auxiliary, Bucket and Boom Section Pilot Orifice Check Valve

Boom Cylinder Remove and Install

Bucket Cylinder Remove and Install

Boom and Bucket Cylinder Bushings and Seals Remove and Install

Boom or Bucket Cylinder Disassemble and Assemble

Loader Start-Up Procedure

Hydraulic System Manifold Remove and Install

Hydraulic System Manifold Disassemble and Assemble

Boom Down Accumulator Remove and Install

Single Lever (Joystick) Pilot Control Valve Remove and Install

Pilot Control Valve Disassemble and Assemble

Two Lever (Fingertip) Pilot Control Valve Remove and Install

Hydraulic Oil Reservoir Remove and Install

Hydraulic Return Manifold Remove and Install

Ride Control Valve Remove and Install

Ride Control Valve Disassemble and Assemble

Ride Control Accumulator Remove and Install

Pin Disconnect Valve Remove and Install

Pin Disconnect Valve Disassemble and Assemble

Fan Motor Remove and Install

Fan Pump Remove and Install

Fan Pump Disassemble and Assemble

Fan Load Sense Manifold Remove and Install

Fan Load Sense Manifold Disassemble and Assemble

Reverse Fan Valve Remove and Install

Reverse Fan Valve Disassemble and Assemble

Section 99: Dealer Fabricated Tools

Group 9900: Dealer Fabricated Tools

DFT1269 Loader Control Valve Lifting Hardware

DFT1044 Air Deflector Bushing

John Deere 4WD Loader 844J Repair Service Manual (TM2307)