In order to quickly attenuate the vibration of the frame and the body, and improve the smoothness and comfort of the car, the car suspension system is generally equipped with shock absorbers. At present, the two-way-acting cylinder shock absorber is widely used in automobiles.

The shock absorber is a vulnerable part during the use of the car. The working quality of the shock absorber will directly affect the smoothness of the car and the life of other parts. Therefore, we should keep the shock absorber in good working condition. The following methods can be used to check whether the shock absorber works well.

1. Make the car stop after driving 10 kilometers on the road with poor road conditions, and touch the shock absorber shell with your hands. If it is not hot enough, it means that there is no resistance inside the shock absorber and the shock absorber does not work. At this time, you can add appropriate lubricating oil, and then carry out the test. If the shell heats up, there is a lack of oil inside the shock absorber, and enough oil should be added; otherwise, the shock absorber has failed.

2. Press the bumper firmly and then release it. If the car jumps 2-3 times, the shock absorber is working well.

3. When the car is driving slowly and braking urgently, if the car vibrates violently, it means there is a problem with the shock absorber.

4. Remove the shock absorber and erect it, clamp the lower connecting ring on the vise, and pull and press the shock absorber rod several times. At this time, there should be stable resistance. Pull up? The recovery resistance should be greater than the downward pressure. If the resistance is unstable or there is no resistance, it may be that the shock absorber is short of oil or the valve parts are damaged, and the parts should be repaired or replaced.

After determining that there is a problem or failure of the shock absorber, check whether the shock absorber leaks oil or has traces of old oil leakage.

If oil leakage is found, first tighten the cylinder head nut. If the shock absorber still leaks, the oil seal and gasket may be damaged and invalid, and new seals should be replaced. If the oil leakage still cannot be eliminated, pull out the shock absorber rod. If you feel a hairpin or change in weight, check whether the gap between the piston and the cylinder is too large, whether the shock absorber piston connecting rod is bent, and the piston connecting rod Whether there are scratches or pull marks on the surface and cylinder.

If there is no oil leakage from the shock absorber, check the shock absorber connecting pin, connecting rod, connecting hole, rubber bushing, etc. for damage, desoldering, cracking or falling off. If the above inspection is normal, the shock absorber should be further disassembled to check whether the matching clearance between the piston and the cylinder is too large, whether the cylinder is strained, whether the valve seal is good, whether the valve clack and the valve seat are tightly attached, and Whether the extension spring of the shock absorber is too soft or broken, repair it by grinding or replacing parts according to the situation.

In addition, the shock absorber will have noise failure in actual use, which is mainly due to the shock absorber colliding with the leaf spring, the frame or the axle, the rubber pad is damaged or falling off, and the shock absorber dust tube is deformed, and the oil If it is caused by insufficient liquid, the cause should be found out and repaired.