John Deere 640D Skidder and 648D Grapple Skidder Operation and Test Service Manual

John Deere 640D Skidder and 648D Grapple Skidder Operation and Test Service Manual

This is the John Deere 640D Skidder and 648D Grapple Skidder Operation and Test Service Manual, as a PDF. It runs to 438 pages in 8 parts.

It covers the John Deere 640D forestry machine. It is John Deere's operation and test manual: how each system works and how to test it.

About the John Deere 640D forestry machine

Forestry machines work in the hardest conditions: skidders, forwarders and harvesters depend on their hydraulics, drivetrain, boom and grapple or harvester head. The manual gives the procedures and specifications to keep them working.

What is inside

Its chapters cover the engine, the transmission and drivetrain, the hydraulic system and the electrical system. The largest sections are Power Train Operation and Tests (124 pages), Hydraulic System Operation and Tests (107 pages) and Electrical Operation and Tests (60 pages).

• Introduction (3 pages)
• General Information (32 pages)
• Operational Checkout Procedure (24 pages)
• Engine Operation and Tests (48 pages)
• Electrical Operation and Tests (60 pages)
• Power Train Operation and Tests (124 pages)
• Hydraulic System Operation and Tests (107 pages)
• Miscellaneous Components (Winch) Operation And Test (37 pages)

What you can do with it

• Understand how each system works
• Run the diagnostic tests in the right order
• Compare readings with the factory specifications
• Find the fault before replacing parts

Who it is for

Owners and operators who maintain their own machines, contractors' and rental workshops, independent repair shops and dealers.

Make sure it is your machine

Check the model and serial number on your machine before ordering. Some manuals only cover a range of serial numbers.

Questions about this manual

Which machines does this manual cover?
The John Deere 640D. If your machine has a different model number, look for the manual for that model.

Is it the original manufacturer manual?
Yes. It is John Deere's own diagnostic manual, not a third-party reprint or a summary.

How many pages does it have?
438 pages, in 8 parts listed above.

How do I receive it?
It is a PDF. After payment it is available to download from your account, and you can read it on a computer, tablet or phone or print the pages you need. No printed book is shipped.