In order to make the frame and body vibration attenuation rapidly, to improve the car's comfort and comfort, car suspension system
with shock absorber commonly, widely used in automobile is two-way cartridge damper.
Shock absorber is the vulnerable parts in the process of car use, shock absorbers work is good or bad, will directly affect the service life of the car moving stationarity and other parts, so we should often make the shock absorber is in good working condition.
Can use the following method to test of shock absorber work are in good condition.
Make cars drive on the poor road conditions of pavement parking after 10 km, shock absorber fingered enclosure, if not enough heat, shock absorber inside without resistance, shock absorber does not work.
At this point, add the appropriate lubricating oil, and then to test, if the shell heat, is for the inside of a shock absorber oil shortage, should add sufficient oil;
Otherwise, the shock absorber.
Hard pressed the bumper, and then release, if the car have 2 ~ 3 jump, then shock absorber works well.
When the car driving slowly and emergency braking, if car more violent vibration, shock absorber has a problem.
Remove the shock absorber to the upright, and connect the bottom ring clamp on the vise, pull reduce vibration lever several times, this time should be stable resistance, pull up resistance should be greater than the resistance when pressing down on them, such as unstable resistance or without resistance, may be internal lack of oil damper or valve parts damaged, should be repaired or replacement parts.
After the shock absorber has a problem or failure, should first check to see if the shock absorber oil spill or chronic traces of oil.
Oil seal gasket, sealing gasket fracture damage of oil storage cylinder head nut is loose.
Is likely to be oil seal, seal gasket failure damage, should change the new seal.
If still can't eliminate the oil spill, should pull out of the shock absorber, if feel the hairpin or weight, will have a further check whether the clearance between the piston and cylinder is too large, the shock absorber piston connecting rod for bending, the piston connecting rod surface and the cylinder have scratches or marks.
Fruits shock absorber oil leakage phenomenon, should check the shock absorber connecting pin, connecting rod, connecting holes, rubber, bushing and so on whether there is damage, desoldering, rupture, or fall off.
If the above check is normal, should be further decomposed shock absorber, check whether the fitting clearance between the piston and cylinder is too large, a cylinder with and without strain, valve seal are in good condition, whether the disc and seat nicely, and whether the presence of shock absorber spring is too soft, or broken, grinding according to the circumstance or change a way to repair.
In addition, the shock absorber in be used actually appear noise fault, this is mainly due to the shock absorber with steel plate spring, frame, or shaft collide, rubber gasket damage or loss and shock absorber dust drum deformation, caused the oil shortage, should find out the reason, to be repaired.
Shock absorber in the inspection after repair performance test shall be carried out on the special test bench work, when the frequency of resistance in 100 + / - 1 mm, the stretching resistance of stroke and the compress stroke should comply with the rules, show that basic normal shock absorber.
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