John Deere 644K 4WD Loader Service Manual

Product Overview

The John Deere 644K 4WD Loader Service Manual provides comprehensive guidance for the operation and maintenance of the 644K Loader with engine models 6068HDW80 (Tier 3) and 6068HDW83 (S2). This manual is designed for loaders with serial numbers before 642443. Available in English and formatted as a PDF, it comprises both the Repair and the Operation and Test sections, covering everything needed to efficiently service your equipment.

Applicable Loader Models: Serial No. (PIN: Before 642443)

Key Features

• Repair Manual: 446 pages
• Operation and Test Service Manual: 1362 pages
• Manual Publication Numbers: TM10695 and TM10694

Benefits

• Thorough coverage of both repair and operational test procedures.
• Safety information and torque specifications included.
• Complete sections dedicated to diagnosing common issues and performing repairs.

Usage Recommendations

• Read thoroughly to ensure safe and proper operation of the John Deere 644K Loader.
• Utilize the detailed sections to troubleshoot and repair specific components, using appropriate tools and specifications provided.
• Note the dual measurement system (metric and U.S.), requiring specific tools for different fasteners.

Manual Contents

Repair Manual Sections

• General Information: Safety, Torque Values
• Wheels: Powered Wheels and Fasteners
• Axles and Suspension: Removal, Installation, Axle Shafts, Bearings, Hydraulic System
• Transmission: Removal, Installation, Gear Systems
• Engine and Auxiliary Systems: Cooling, Exhaust, Fuel Systems
• Service and Park Brakes: Active Elements, Hydraulic Systems
• Frame and Structure: Installation, Protection
• Operator’s Station: Enclosure, Seat Safety, Climate Control
• Sheet Metal and Styling: Engine Housing
• Loader: Bucket, Frames, Hydraulic System
• Dealer Fabricated Tools

Operation and Test Manual Sections

• General Information
• Diagnostic Trouble Codes: ECU, TCU, FLC, etc.
• Operational Checkout Procedure
• Engine Operations and Diagnostics
• Electrical Systems: Diagrams, Diagnostics
• Power Train: Adjustments, Tests
• Hydraulic Systems: Theory, Diagnostics
• Heating and AC Operations

The manual provides essential tools, service equipment, materials, service parts kits, specifications, wear tolerances, and torque values. This manual acts as an on-the-job guide, focusing on the necessary information for effective diagnosis and repair of your John Deere Loader.