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By the oil seal leakage is found, we must first confirm the leak position, if not by the oil seal leakage, sometimes due to reasons such as grease leakage outside attached and mistaken for leakage. The main reason causing the seal leakage,
Surface deformation static 1, due to tolerances on dimensions does not accord with the standard of the oil seal cavity and outer edge and a matched sealing;
2, because the conditions are too harsh to cause material cracks, especially in the oil seal edge cracks;
3, because the conditions are too harsh and rubber elastic body and a working medium incompatibility caused by rubber or elastomer hardness increases, the hardness is too high;
4, the rubber sealing medium swelling, reduce rubber hardness, thereby the aging oil seal premature and wear;
Corrosion of 5, by a shaft to the sealing lip area, will give the sealing system sealing performance to stay hidden permanent fault;
6, lubricant failures and make the system in dry running state, so that the sealing lip rapid wear;
7, comprehensive aging, rubber elastomer sealing medium and both aging;
In 8, the sealing lip is formed at the "carbon" dirt, make the oil seal lip have been picked up, causing leakage fault sealing system;
9, seal oil seal lip is no longer follow the vibration shaft surface and shaft runout;
10, the contaminants from the sealed permanently embedded in the outside sealing edge causing the shaft surface and premature wear of sealing lip;
11, the assembly process is not standard caused by shaft surface contact surface is caused by damage to the sealing lip premature wear; 12, sealing cutting edge in the storage, transportation and assembly process is damaged.