If you're dealing with power steering leaks on your Massey Ferguson or Landini tractor, this Arko seal kit is exactly what you need. The part number 3404477M91 matches the OEM specification, so you know it'll fit perfectly. This kit works with a ton of models - Massey Ferguson 230, 240, 243, 253, 263, 340, 350, 355, 360, 362, 372, 4215, 4220, 4315, plus Landini 5830 and 6030. It also fits some construction and industrial models like the 20F, 30E, and 30H. The quality is top-notch - these are 100% new seals that meet OEM standards, and they've been leakage tested to ensure they work properly. No more dealing with messy power steering fluid leaks or poor steering performance. Installation is straightforward if you're handy with tractor repairs, but you might want a service manual if you're not familiar with power steering systems. The kit comes with everything you need to rebuild your power steering cylinder and get back to work. Much cheaper than replacing the whole cylinder, and just as reliable. Your tractor will steer like new again without breaking the bank. Perfect for farmers, mechanics, or anyone who maintains their own equipment. Keep your tractor running smooth with quality parts that won't let you down!