How to detect shock absorber failure?

How to detect shock absorber failure?

In order to quickly attenuate the vibration of the frame and the body, and improve the ride comfort and comfort of the car, the car suspension system is generally equipped with a shock absorber, and the automobile is widely used as a two-way action cylinder type shock absorber.

Shock absorber detection includes shock absorber performance test, shock absorber durability test, shock absorber double excitation test

test. Each type of shock absorber is subjected to a work test, a friction test, a temperature characteristic test, and the like.

First, let the car stop on the road with poor road conditions for 10km, and touch the shock absorber shell by hand. If it is not hot enough, there is no resistance inside the shock absorber, and the shock absorber does not work. At this time, the appropriate lubricating oil can be added, and then the test is carried out. If the outer casing is heated, the inside of the shock absorber is lacking in oil, and sufficient oil should be added; otherwise, the shock absorber is invalid.

Second, press the bumper hard and then release. If the car has 2~3 jumps, the shock absorber works well.

Third, when the car is driving slowly and braking urgently, if the car vibration is severe, it indicates that the shock absorber has a problem.

4. Remove the shock absorber and erect it, and clamp the lower end connecting ring on the vise. Pull the damping rod several times. At this time, there should be stable resistance. The resistance to pull up (recover) should be greater than that. The resistance when pressing down, such as unstable resistance or no resistance, may be due to lack of oil inside the shock absorber or damage to the valve parts. Repair or replacement of parts should be performed.