The John Deere 317 tractor represents the “deluxe” series of 300 class hydrostatic tractors manufactured from 1979 to 1983-84. John Deere decided to add several new design additions, including moving much of the steering equipment to the left side of the chassis.  for the first time, Deere put a 3 cylinder tractor into a 300 series tractor. The horizontally opposed…