The reasons for the oil leakage of the shock absorber are as follows:
1. The internal cleanliness of the shock absorber is not good, and there are welding slag, iron filings and other sundries that cause the oil seal to wear.
2. The working conditions of the shock absorber are bad, and foreign debris such as sand enters the oil seal.
3. The sealing interface of the shock absorber oil seal is aging and loses its sealing function.
4. When installing on the chassis, the shock absorber is not well covered.
5. The support rod that controls the movement of the piston needs to be extended at one end of the metal pipe, which is caused by the lack of sealing.