Pair Power Steering Cylinder Ram for Massey Ferguson 240 240S 250 255 Tractor. 1x Power Steering Cylinder LH 1x Power Steering Cylinder RH - Please Note: Opposite hands when fitted to MF 550 - Cylinder length: 210mm - Cylinder diameter: 50mm - Hydraulic Connection: 7/16 UNF - Ball Joint Size: 19mm - Closed Ball Joint Centres Distance: 275mm. Massey Ferguson 135, 148, 230, 235, 240, 240S, 245, 250, 255, 260, 550, 560, 20D, 20E.