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Common faults of automobile shock absorbers
Release Time:
2021-09-15
In order to rapidly attenuate the vibration of the frame and the body and improve the ride comfort and comfort of the car, shock absorbers are generally installed on the car suspension system.
In order to rapidly attenuate the vibration of the frame and the body and improve the ride comfort and comfort of the car, shock absorbers are generally installed on the car suspension system.
The shock absorber is a vulnerable part during the use of the car. The quality of the shock absorber will directly affect the stability of the car and the life of other parts. Therefore, we should always keep the shock absorber in good working condition. The following methods can be used to check whether the shock absorber works well.
1. Stop the car after driving for 10 kilometers on a road with poor road conditions, and touch the shock absorber shell with your 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 the test can be carried out. If the outer casing is hot, it means that the shock absorber is short of oil, and sufficient oil should be added; otherwise, the shock absorber is invalid.
2. Press the bumper hard, then release it. If the car jumps 2-3 times, it means that the shock absorber works well.
3. When the car runs slowly and brakes urgently, if the car vibrates violently, it means that there is a problem with the shock absorber.
4. Remove the shock absorber and stand it upright, and clamp the lower end 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 resistance of recovery should be greater than that of down If the resistance is unstable or no resistance, it may be due to lack of oil inside the shock absorber or damage to the valve parts, which should be repaired or replaced.
After confirming that the shock absorber has a problem or failure, you should first 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 oil, it may be that the oil seal and the sealing gasket are damaged and fail, and new seals should be replaced. If the oil leakage still cannot be eliminated, pull out the shock absorber rod. If you feel that there is a hairpin or different weights, then further check whether the gap between the piston and the cylinder is too large, whether the shock absorber piston connecting rod is bent, and whether the piston connecting rod is bent. Whether there are scratches or pull marks on the surface and cylinder.
If the shock absorber does not leak oil, check the shock absorber connecting pin, connecting rod, connecting hole, rubber bushing, etc. for damage, desoldering, cracking or falling off. If the above inspections are normal, the shock absorber should be further disassembled to check whether the matching gap between the piston and the cylinder is too large, whether the cylinder is strained, whether the valve seal is good, whether the valve disc and the valve seat fit tightly, and whether the reduction Whether the extension spring of the shock absorber is too soft or broken, repair it by grinding or replacing it according to the situation.
In addition, the shock absorber will have a sound failure in actual use, which is mainly due to the shock absorber colliding with the leaf spring, frame or axle, the rubber pad is damaged or falling off, the shock absorber dust tube is deformed, the oil If it is caused by reasons such as insufficient, the cause should be identified and repaired.
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