JLG 644 1044 Telehandler Service Manual

This is the official OEM service manual for JLG 644B, 6K, 844C, 8K, 1044C, and 10K telehandler models, formerly manufactured under the Lull brand. Covering the complete telescopic handler line with John Deere and Cummins diesel engine variants, this factory manual provides the same detailed service procedures used by authorized JLG dealers and professional equipment technicians.

• Adobe Acrobat (PDF) format
• Fully searchable
• Easily print any or all content
• Everything needed to repair & maintain your equipment
• Troubleshooting instructions, wiring diagrams, and reference material

• Complete hydraulic schematics for all telehandler models
• Electrical harness diagrams and lockout circuits
• ZF transmission service and torque converter procedures
• Boom hydraulics and joystick control systems
• John Deere 4039D/4045T/6068D engine specifications
• Cummins 4BT3.9/6B5.9 diesel engine specifications
• Brake system bleeding and caliper service
• Outrigger and stabilizer cylinder procedures
• Torque charts and pressure specifications
• Lubrication schedules and fluid specifications
• Quick attach and boom inclinometer service
• Troubleshooting and diagnostic procedures

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• The manual was just what I needed to fix the problem with my lower unit.
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• Received my repair manual as described — super easy. Will be nice to have detailed instructions for my machine.

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