In order to make the frame and body of the vibration of the rapid attenuation, improve the ride and comfort of the car, the car suspension system is generally equipped with shock absorbers, the automobile is widely used in the bidirectional role of the cylinder shock absorber.
Brief introduction:
Shock absorbers are fragile parts in the process of automobile use, the working quality of shock absorbers will directly affect the stability of automobile driving and the life of other parts, so the shock absorbers should always be in good working condition.
Testing for bug:
1. Make the car stop after driving 10km on the road surface with poor road conditions, touch the shell of the shock absorber 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, if the shell heat, for the shock absorber internal lack of oil, should add enough oil; Otherwise, the shock absorber fails.
2. Press the bumper firmly and then release it. If the car jumps two or three times, the shock absorber is working well.
3. When the car is moving slowly and the emergency brake, if the car vibration is more severe, it indicates that there is a problem with the shock absorber.
4. Remove the shock absorber to stand upright, and clamp the lower connecting ring on the vise, pull the damping rod several times, at this time there should be stable resistance, the resistance to pull up should be greater than the resistance to press down, such as resistance instability or no resistance, may be the shock absorber internal lack of oil or valve parts damaged, should be repaired or replaced parts
Breakdown maintenance:
After determining the shock absorber has a problem or failure, we should first check whether the shock absorber has oil leakage or traces of old oil leakage.
Oil seal gasket, sealing gasket rupture damage, oil storage cylinder head nut loose. It may be that the oil seal and sealing gasket are damaged and invalid, and new seals should be replaced. If the oil leakage still cannot be eliminated, the shock absorber should be pulled out. If the hairpin or weight is not felt, the gap between the piston and cylinder should be further checked whether the piston and cylinder is too large, the piston connecting rod of the shock absorber is not bent, and the surface of the piston connecting rod and cylinder is scratched or pulled.
If the shock absorber does not leak oil, it should check the shock absorber connecting pin, connecting rod, connecting hole, rubber bushing, etc., whether there is damage, welding, cracking or falling off. If the above inspection is normal, the shock absorber should be further decomposed, check whether the gap between the piston and cylinder is too large, the cylinder is not strained, the valve seal is good, the valve disc and seat fit is tight, and the shock absorber stretch spring is too soft or broken, according to the situation to take repair or replace the method of repair.
In addition, the shock absorber will appear in the actual use of the fault of the sound, which is mainly due to the shock absorber and leaf spring, frame or shaft collision, rubber pad damage or fall off and shock absorber dustproof cylinder deformation, insufficient oil and other reasons, should be found out the cause, repair.
The shock absorber should be tested on a special test table after inspection and repair. When the resistance frequency is 100±1mm, the resistance of its stretch stroke and compression stroke should meet the requirements. For example, the maximum resistance of the stretch stroke of CAl091 liberation is 2156~2646N, and the maximum resistance of the compression stroke is 392~588N; The maximum resistance of east windmill stretching stroke is 2450~3038N, and the maximum resistance of compression stroke is 490~686N. If there is no test condition, we can also adopt a kind of experience, with an iron rod through the shock absorber in the bottom rings, with his feet on the side, holding the rings on the reciprocating 2 ~ 4 times, when pull up resistance is very big, pressing down on them without taxing, and stretching resistance compared with before repairing recovered, no idle, indicates basic normal shock absorber .
Max Auto Parts Ltd is China top manufacturer of shock absorber , with ISO 9001 and IATF 16949 certificate , if you are looking for shock absorber supplier , send us email and contact .
Post time: Sep-16-2022