John Deere 644K 4WD Loader Repair & Service Manuals

Product Overview

Discover the comprehensive John Deere 644K 4WD Loader Repair and Service Manuals, essential for maintaining your loader. These manuals cover two significant sections: the Repair Manual and the Operation and Test Manual. Specifically designed for loaders with serial numbers ranging from 642444 to 658217, these manuals are available in PDF format and entirely in English.

Publication Numbers: TM12106 and TM12108

Engines: 6068HDW80 Tier 3 and 6068HDW83 S2

Applicable Loader Model: John Deere Loaders

Key Features

• Repair Service Manual – 440 Pages
• Operation and Test Service Manual – 1400 Pages

Benefits

• Thorough guidance on repair and maintenance procedures.
• Helps identify routine failures for quick diagnostics.
• Includes safety measures and torque values for better operation.

Usage Recommendations

• Ideal for technicians and repair professionals working with John Deere 644K loaders.
• Recommended to read the manual carefully to prevent personal injury or equipment damage.
• Essential for maintaining efficient operation and extending loader lifespan.

Manual Contents

Repair Manual

• General Information
  • Safety
  • Torque Values
• Wheels u2014 Powered Wheels and Fastenings
• Axles and Suspension Systems
  • Removal and Installation
  • Axle Shafts and U-Joints
  • Axle Shaft, Bearings, and Reduction Gears
  • Hydraulic System
• Transmission
  • Removal and Installation
  • Gear, Shafts, and Power Shift Clutches
  • Hydraulic System
• Engine u2014 Removal and Installation
• Engine Auxiliary System
  • Cold Weather Starting Aids
  • Cooling Systems
  • Intake System
  • External Exhaust Systems
  • External Fuel Supply Systems
• Steering System u2014 Hydraulic System
• Service Brakes and Park Brake
  • Active Elements
  • Hydraulic System
• Operator’s Station u2014 Removal and Installation, Enclosure, Seat and Seat Belts, Heating and Air Conditioning
• Loader u2014 Bucket, Frames, Hydraulic System
• Dealer Fabricated Tools

Operation and Test Manual

• General Information u2014 Safety
• Diagnostics
  • Engine Control Unit (ECU) Diagnostic Trouble Codes
  • Transmission Control Unit (TCU) Diagnostic Trouble Codes
  • Vehicle Control Unit (VCU) Diagnostic Trouble Codes
• Engine
  • Theory of Operation
  • Diagnostic Information
  • Tests
• Electrical System u2014 System Information, Diagrams, Diagnostics
• Power Train & Hydraulic System”, “