The genuine Yanmar 11993401800 Oil Seal is a critical component designed for reliable sealing in a wide range of Yanmar engines and compatible John Deere agricultural machinery. With precise dimensions of 65mm inner diameter, 85mm outer diameter, and 10mm thickness, this OEM seal prevents oil leaks and maintains engine integrity. It is an essential replacement part for routine maintenance and repairs, ensuring long-lasting performance and compatibility with models such as Yanmar 3TNV88, 4TNV88, 4TNV94, 4TNV98, 4TNV106, 4TNE88, 4TNE94, 4TNE98, 4TNE106 engines, and numerous John Deere tractors including the 4044R, 5075E, and 6140D series. This part cross-references to John Deere part number RE500293.