Resulting in oil seal the main factors

Lack of oil seals is the main factor causing oil spills. When the shaft wears to form the groove, even if the new oil seal can not be sealed, it is because the oil seal lip and the shaft contact pressure drop, resulting in oil seal lip diameter and shaft diameter after the interference is too small. S195 diesel engine crankshaft oil seal is an example, the analysis of the main reasons for poor sealing: