This plastic plain bearing fits the threshing unit of the parent combine. It supports a rotating shaft within the threshing mechanism, allowing smooth relative motion between the shaft and its housing. The bearing absorbs radial loads transmitted from the threshing drum or related rotating components. As the plastic liner wears, clearance increases, which can lead to shaft vibration and uneven threshing action. The original part is molded to the same internal and external dimensions as the factory assembly, so it seats in the housing without modification. On installation, ensure the bearing is fully seated and the retaining hardware is secured to the specified torque.