The Main Factors Causing Oil Seal Leakage

Loose oil seal is the main factor causing oil leakage. When the shaft wears and forms grooves, even if a new oil seal is replaced, it cannot be sealed because the contact pressure between the oil seal lip and the shaft decreases, resulting in a too small interference between the oil seal lip diameter and the shaft diameter after installation.
Taking the S195 diesel engine crankshaft oil seal as an example, the main reasons for its poor sealing are analyzed as follows:
① Poor quality of oil seal manufacturing;
② Poor quality of shaft or bearing;
③ Improper use and maintenance;
④ Improper installation;
⑤ Improper storage and adverse effects caused by environmental pollution