1981 John Deere 8640 4wd Harmon Air Drill Technotil openers. Willing to sell separate! Tractor is a 1981 8640 ORIGINAL OWNER Always stored inside4700hrs Triples Air seeder is a 40ft Harmon triple flex with technotil openers Agtron blockage monitors seed brakes on every run 3 compartment grain cart 300 bushel capacity Green drop 1200 gallon liquid cart with Raven rate controller $35000 Canadian ...