1. Check the shock absorber for oil leakage
A slight oil leakage is normal. When the oil leakage is serious, it is mainly due to the wear or damage of the oil seal, the liner is broken and crushed, or the screw plug is loose. The oil seal and gasket should be replaced and the screw plug should be tightened. Generally, the shock absorber is not repaired and must be replaced.
2. Check whether the shock absorber is working normally.
In the absence of a shock absorber performance test bench, the quality of the shock absorber is generally judged based on feeling and experience.
After the car has been running on a bad road for a period of time, it is normal to touch the shock absorber with your hand. If it is not hot, it means that there is no resistance and it can no longer reduce vibration;
If the shock absorber makes an abnormal noise, it means that the shock absorber is damaged and must be replaced;
If the temperature of the two shock absorbers is high and the other is low, and the difference is large, the lower one has little resistance or no resistance, generally due to lack of oil or damaged valve parts, etc., should be replaced.
3. Inspection of the effectiveness of the shock absorber
Press the bumper firmly, first press the upper body part of the shock absorber hard, and vibrate several times. After releasing it, if the shock absorber can vibrate more than two times, it indicates that the efficiency of the shock absorber is not reduced.
When removing and checking, the shock absorber should be fixed, and there should be a certain resistance when the piston rod is moved up and down, and the upward resistance is greater than the downward resistance. If the resistance is too large, check whether the piston rod is bent; if there is no resistance, it means that the front shock absorber damper oil has leaked light or has failed and must be replaced.