John Deere JD644, JD644-A Loaders Technical Manual

John Deere JD644, JD644-A Loaders

This is the COMPLETE factory Technical Manual for the John Deere JD644, JD644-A Loaders. This manual is very detailed and contains information and data to this model. has specs, diagrams, and actual real photo illustrations, and schemes. which give you complete step by step operations on repair, assembly, disassembly, Diagnosing, servicing, technical maintenance & troubleshooting procedures for your machine.

Models Covered:
John Deere JD644 Loaders
John Deere JD644-A Loaders

This Manual Covers:
Section 10 – General
Group 5 – Specifications
Group 10 – Predelivery, Delivery, and After-Sales Service
Group 15 – Tune-Up and Adjustment
Group 20 – Lubrication
Group 25 – Loader Separation

Section 20 – Engine
Group 5 – Diagnosis
Group 10 – Basic Engine
Group 15 – Engine Lubrication
Group 20 – Speed Control Linkage
Group 25 – Engine Cooling
Group 30 – Specifications and Special Tools

Section 30 – Fuel System
Group 5 – System Diagnosis
Group 10 – Tank, Filters, and Transfer, Pump
Group 15 – Air Intake System
Group 20 – Fuel Injection Pump
Group 25 – Roosa-Master Injection Nozzles

Section 40 – Electrical System
Group 5 – Wiring Diagrams
Group 10 – Charging System
Group 15 – Starting Circuit
Group 20 – Gauges and Switches

Section 50 – Power Train
Group 5 – System Diagnosis
Group 10 – Damper Assembly and Drive Shafts
Group 15 – Transmission Assembly
Group 16 – Disconnect Output Shaft
Group 20 – Axle Assemblies
Group 25 – Differentials

Section 60 – Power Steering and Brake Systems
Group 5 – General Information, Testing, and Diagnosis
Group 10 – Hydraulic Pump
Group 15 – Filters, Oil Cooler, and Accumulators
Group 20 – Steering System
Group 25 – Brake System

Section 70 – Hydraulic System (Loader Functions)
Group 5 – General Information, Testing, and Diagnosis
Group 10 – Reservoir and Filters
Group 15 – Hydraulic Pump
Group 20 – Control Valve
Group 25 – Return-to-Dig Valve
Group 30 – Backhoe Control Valve
Group 35 – Cylinders
Group 40 – Backhoe Swing Cylinder

Section 80 – Miscellaneous Components
Group 5 – Frames
Group 10 – Buckets
Group 15 – Drott 4-in-1 Buckets
Group 20 – 9305 Backhoe
Group 25 – Specifications and Special Tools


Model Specification: John Deere JD644, JD644-A Loaders
Publication number: TM-1011
Total Pages: 340
File Format: PDF
Requirements: Adobe PDF Reader
Language: English
Compatible: All Versions of Windows & Mac, Linux OS, Iphone, Ipad, Android etc…


This manual is in PDF format, The Technical Manual PDF is Fully Indexed and Bookmarked by Topic. This is an original Adobe document which equals Perfect Quality and Perfect Printing. The PDF can be searched quickly to find what you need to know in every Chapter. You can print the Entire manual or ANY Pages you want to select. You can also Zoom in on any Diagram or Picture to easily SEE EVERY PART.

Save time and money by doing your own repairs! This manual makes any repair job easy to do with very easy to follow step-by-step instructions & pictures on all areas of repair.

This manual is INSTANT DOWNLOAD. It means no shipping cost or waiting for a CD / paper manual to Arrive in the Mail. You will be able to download the file immediatly after payment is submitted. The download link will appear at the checkout page and it will be emailed to you as well.

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