The naturally-aspirated version of the 404-cubic-inch diesel engine produced 95 PTO horsepower for the John Deere 4020 tractor. However, the 4620 and 7020 tractors were industry trendsetters ...

“I guess what started this was, I wanted a pedal tractor like I had when I was little,” Ash said. “I have brands like Oliver, John Deere, Ford, Massey Harris, Case, and Allis Chalmer ...