Complete workshop & service manual with electrical wiring diagrams for John Deere JD640 Skidder/Grapple Skidder. It's the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

John Deere JD640 Skidder/Grapple Skidder Technical Manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. The printer-ready PDF documents work like a charm on all kinds of devices.

TM1124 - John Deere JD640 Skidder- Grapple Skidder Technical Manual.pdf
1,264 pages, bookmarked, Searchable, Printable, high quality PDF

EXCERPT:
Check the clearance between the valve liner and return seat (Fig. 13) for a measurement of 0.010 to 0.030 in. (0.25 to 0.76 mm). If measurement is not within specifications, readjust shim pack.
This can be checked by installing a shim between valve liner and return seat. If one but not two shims slide in between liner and return seat, then clearance is correct.
...