1, the internal cleanliness of the shock absorber is not good, there are welding slag, iron filings and other debris resulting in oil seal wear. 2, the working conditions of the shock absorber are poor, and the external sediment and other debris enter the oil seal. 3. The sealing interface of the shock absorber oil seal is aging and loses the sealing function. 4. When spraying the chassis armor, the shock absorber is not covered well, and the armor is attached to the piston rod of the shock absorber. 5, the support rod that controls the movement of the piston needs to be extended at one end of the metal tube, which is caused by a loose seal.
< br >
What causes the shock absorber to leak oil
< br >
Car shock absorber oil leakage how to do
< br >
1, the surface of the shock absorber cylinder is not necessarily oil leakage, to determine whether the shock absorber oil leakage failure, but according to the style of the shock absorber, leakage grade, oil location and other factors to determine whether it needs to be replaced. For shock absorbers with only minor leakage, there is no need to replace them. In addition, the shock absorber will leak oil during normal operation, which is normal.
< br >
2, but for the front shock absorber such pillar shock absorber, the oil film is between the oil seal cover and the spring seat, it is not necessary to replace. However, if the oil leaks below the spring seat or the oil penetrates below the spring support or drops of oil appear, the shock absorber needs to be replaced.
< br >
Types of automobile shock absorbers
< br >
1, hydraulic type. Hydraulic shock absorber is widely used in automobile suspension system. The principle is that when the frame and the axle do reciprocating relative motion and the piston moves reciprocating in the cylinder of the shock absorber, the oil in the shock absorber housing will repeatedly flow from the inner cavity through some narrow pores into another inner cavity. At this time, the friction between the liquid and the inner wall and the internal friction of the liquid molecules form a damping force on the vibration.
< br >
2. Inflatable. Inflatable shock absorber is a new type of shock absorber developed since 1960s. The structure is characterized by a floating piston in the lower part of the cylinder, and a closed air chamber formed by the floating piston and one end of the cylinder is filled with high-pressure nitrogen. The floating piston is equipped with a large section O-ring seal, which completely separates the oil and gas. The working piston is equipped with a compression valve and a stretching valve that change the cross-sectional area of the channel with the size of its moving speed. When the wheel beats up and down, the working piston of the shock absorber does reciprocating movement in the oil, so that the oil pressure difference between the upper chamber and the lower chamber of the working piston is generated, and the pressure oil will push the compression valve and the expansion valve and flow back and forth. Because the valve has a large damping force on the pressure oil, the vibration is attenuated.