This washer is a drive-system component that maintains axial clearance between rotating and stationary parts in the tractor driveline. It sits between a shaft shoulder and a bearing face or gear face, preventing metal-to-metal contact and controlling end-play under load. A worn or incorrectly sized washer allows excessive axial movement, which can produce driveline noise, uneven gear engagement, and accelerated bearing wear. This original AGCO part is machined to the same thickness and flatness as the original production washer, so no shimming or selective fit is needed during installation. On reinstall, ensure the contact faces are clean and free of burrs.