621170 OIL SEAL

SKU: 5595

The 621170 oil seal sits where a shaft or plunger passes from the oil-filled crankcase into the water end of the pump, keeping lubricating oil in and water out. When an oil seal fails, the symptoms are unmistakable: oil weeping at the seal area or milky, water-contaminated crankcase oil that accelerates wear on every moving part it touches. Oil seals are wear items and are normally replaced as a set during a pump overhaul. This is a part-number-specific seal: confirm 621170 against your pump's parts list or data plate, and install it with clean sealing surfaces and the lip oriented per the service diagram.