One New Aftermarket Replacement Power Steering Cylinder Repair Kit Fits Massey Ferguson Tractor Models:135 (UK), 148, 230, 240 (s/n: N01001-A20286, with cylinders: 3401240M91, 3401241M91), 550 (UK) Fits Massey Ferguson Construction & Industrial Models:20E, 40 (s/n: 838145-later) Tech Info:Kit Includes: (1) 1442919X1 O-Ring, (1) 1749973M1 Seal, (1) 1884795M1 Ring, (1) 3186175M1 Seal, (1) 1851635M1 O-Ring, (1) 1851626M1 Seal Replaces Part Numbers:3314663M91