In order to reduce the vibration of the frame and the body quickly, improve the ride comfort and comfort of the vehicle, the vehicle suspension system is generally equipped with shock absorbers, and the two-way action tube type shock absorber is widely used in automobiles.
Shock absorber is a vulnerable part in the process of automobile use. The work of shock absorber will directly affect the stability of the vehicle and the life of other parts. Therefore, we should keep the shock absorber in a good working state. The following methods can be used to check whether the shock absorber works well.
1. make the car stop after 10km on the road with poor road conditions, and touch the shock absorber shell by hand. 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, appropriate lubricating oil can be added and then tested. If the shell is hot, it is the oil shortage inside the shock absorber. If enough oil is added, it will indicate that the shock absorber fails.
2. press the bumper firmly and release it. If the car has 2-3 jumps, it means that the shock absorber works well.
3. when the car is slow and the emergency braking is in progress, if the vibration of the vehicle is relatively violent, it indicates that 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 press the damper several times. At this time, there should be stable resistance. The upward drag should be greater than the resistance when the pressure is down. If the resistance is unstable or no resistance, it may be oil shortage inside the shock absorber or the valve parts are damaged. Repair or replace the parts.
After determining whether the shock absorber is in problem or failure, check whether the shock absorber has oil leakage or the traces of old oil leakage.
If there is no oil leakage in the shock absorber, check the bushing for damage, welding, rupture or falling off. If the above inspection is normal, further disassemble the shock absorber, check whether the matching clearance between piston and cylinder is too large, whether the cylinder cylinder is damaged, whether the valve seal is good, whether the valve disc and the valve seat are tightly connected, and whether the spring of the spring is too soft or broken. Check the connecting pin, connecting rod, connection hole, rubber, etc Repair the situation by grinding or replacing parts.