John Deere JD120 Excavator Owner Operator Maintenance Manual OMT159939 A7. This is in good used condition. Complete with no missing pages. Thanks for looking and good luck!!!!!! The item “John Deere JD120 Excavator Owner Operator Maintenance Manual OMT159939 A7″ is in sale since Friday, April 17, 2020. This item is in the category “Business & Industrial\Heavy Equipment, Parts & Attachments\Heavy Equipment Parts & Accessories\Heavy Equipment Manuals & Books”. The seller is “manualbasket” and is located in Fairfield, Iowa. This item can be shipped worldwide.