Press the bumper with force and then release it, if the car has 2~3 jumps, it means the shock absorber is working well, and vice versa, it is not working very normally.
Remove the shock absorber and put it upright, and clamp the lower connecting ring on the vise, pull and press the damping rod several times, there should be stable resistance at this time, the resistance of pulling upward should be greater than the resistance when pressing downward, such as unstable resistance or no resistance, it may be the shock absorber internal oil shortage or valve parts damage, it should be repaired or replaced parts. Make the car in poor road conditions on the road after 10km parking, feel the shock absorber shell with your hand, if not hot enough, it means that there is no resistance inside the shock absorber, the shock absorber does not work. At this time, you can add the appropriate lubricant, and then test, if the shell is hot, the shock absorber internal lack of oil, should add sufficient oil; otherwise, the shock absorber failure.
Shock absorber in actual use will have a rattling fault, which is mainly due to the shock absorber and steel plate spring, frame or shaft collision, rubber pad damage or fall off and shock absorber dust cylinder deformation, insufficient oil and other reasons, should identify the cause, be repaired. The normal work of the shock absorber can ensure that we drive more smoothly in the process of moving forward, so check the normal work of the shock absorber in time.
