Have you baled hay with an ol’ johnny popper? In Peru, Indiana they used this standard tread John Deere 720 to pull their John Deere 510 baler. Back in the 1970’s, tests on the 510 baler produced bales that were 63 inches in length, 71 inches in diameter and can weighed from 1,213 to 2,315 pounds. Under similar conditions, the PTO horsepower needed to run the baler varied from 27 horsepower in hay to 24 horsepower in straw. In 1978 the John Deere 510 baler would have cost your about $8,267 US do