This seal ring sits in the drivetrain assembly of the host tractor or self-propelled forage harvester, preventing lubricant leakage between rotating and stationary components. It is installed in the seal housing at the shaft exit point, where it maintains a static seal against the housing bore while the shaft rotates inside. A worn or hardened ring allows oil seepage past the seal face, leading to gradual lubricant loss and potential contamination of the drivetrain bearings. The original AGCO-manufactured ring is formed to the same cross-section profile as the original housing groove, so it seats without distortion and maintains consistent radial pressure against the shaft. On reinstallation, clean the housing bore and ensure the ring is not twisted during insertion.