John Deere 4020 History, Specs, Parts Review, engine detailsIf you are looking for the history of vintage and most famous John Deere 4020 tractor. Find out all accurate information such as its specifications, history, Engine, transmission, parts, etc about this tractor. Before sell or buy check JD 4020 information below. Nowadays, It is old but the most popular tractor in the … [Read more...] about John Deere 4020 Vintage Tractor History, Specs, Price & Features