John Deere 4320 HP, Price, Specs, Review, Weight, Engine Oil Capacity, Attachments, History & Pictures The John Deere 4320 was a tremendous mid-range tractor when released: it snuggled between the D21 and 1206, the Massey Ferguson 1130, Ford 9000, and Oliver 1950. It was heavier-duty than the John Deere 4020 tractor with a beefy gearset, better cooling, and a more … [Read more...] about John Deere 4320 HP, Price, Specs, Review & Attachments