This scraper ring fits onto the shaft of the hydraulic pump in a grain harvester. It wipes the shaft surface to prevent external debris from entering the pump housing along the rotating interface. A worn ring allows dirt ingress, which can score the shaft seal and lead to external leakage. The ring is manufactured to the original shaft diameter and groove profile so it seats without modification. On replacement, ensure the ring is oriented with its scraping edge facing outward and that the shaft surface is clean and free of burrs.