[Function]: 3904170M1 Cylinder seals keep hydraulic fluid from leaking outside of the cylinder during operation. Seals are also responsible for ensuring that there is a thin layer of lubrication on the piston rod. Not only prevents corrosion but also lubricates other important parts of your cylinder. [Fit on]: 3904170M1 Power Steering Cylinder Seal Kit fits for Massey Ferguson Tractor models: 231, 240, 253, 263, 362. Used on 3401553M92, 3401285M93 Cylinders. [Material]: Kit are made of high-quality materials for a long service life. Easy to replace, affordable, and reduce your maintenance costs. .