John Deere 990 Excavator Service Technical Manual. Offered for sale is this Technical Manual TM-1230 for John Deere 990 excavators. This is a very thick manual with lots of pictures. It is over 2 1/2 thick and comes in this Deere binder. Check my other listings while you’re here. I will be listing many parts and farm related items over the winter months so check back often or add me to your favorites list. Track Page Views With. Auctiva’s FREE Counter. The item “John Deere 990 Excavator Service Technical Manual” is in sale since Saturday, July 28, 2018. This item is in the category “Business & Industrial\Heavy Equipment, Parts & Attachments\Heavy Equipment Parts & Accessories\Heavy Equipment Manuals & Books”. The seller is “amos2442″ and is located in Van Buren, Ohio. This item can be shipped worldwide.