John Deere 50 From 1952 the B was replaced by the John Deere 50. with updated styling and a cast frame. Power was increased by 10 percent with the same engine, and a rack-and-pinion rear wheel adjustment was provided, along with live hydraulics and power take-off. Fuel options included gasoline, all-fuel and LP gas.[2][6][7] 32,574 50s were built at Waterloo, selling for about $2,000.