This felt seal ring sits in the threshing drive assembly of the parent combine. It prevents lubricant leakage and keeps contaminants out of the bearing or shaft interface at that location. The ring is compressed between the stationary housing and the rotating shaft, forming a contact seal that relies on the felt material to absorb and retain oil for continuous lubrication. A worn or hardened ring allows oil to weep past the seal, leading to bearing starvation and eventual seizure. The original manufacturer's felt density and thickness are matched to the groove dimensions in the housing, so the ring maintains the correct interference fit without requiring shims or additional sealants. On replacement, ensure the housing bore and shaft are clean and free of burrs before pressing the ring into place.