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Automobile shock absorber of the common faults and repair methods
Hits:2904         Date:2013/10/29
In order to make the frame and the rapid decay of the vibration of the body , improve vehicle ride comfort and comfort, vehicle suspension systems are generally equipped with shock absorbers, is currently widely used in the car is dual acting telescopic shock absorbers.
Automobile shock absorber is used in the process of wearing parts , shock absorbers work is good or bad , will directly affect the smooth running cars and other parts of life , so we should make the shock absorber always in good working condition . The following methods can test whether the work of a good shock absorber .
1 . The poor condition of the road car driving on the road after 10km parking , touch damper housing , if not hot enough , indicating internal shock absorber without resistance , shock absorbers do not work. At this point , you can add the appropriate lubricant, and then test, if the shell fever, compared with internal shock absorber oil, should add a little oil ; otherwise , indicating shock absorber failure .
2 Press firmly bumper, then release , if the car has 2 to 3 times jump, then the shock absorbers work well .
3 When the car slowly driving and emergency braking, if the vehicle vibration more intense , indicating shock absorber problem.
4 Remove the shock absorber in the upright position , and the lower end of the connecting ring in the vise clamp , pull compression damping lever several times , this time should be stable resistance , pull up ( recovery ) should be greater than the resistance to under the pressure of resistance, such as resistance to unstable or no resistance , it may be short of oil damper or valve internal parts damage should be repaired or replaced parts.
In determining the shock absorbers have a problem or failure, shock absorbers should first check whether there is oil or traces of old oil spills .
Seal gaskets, gasket rupture damaged oil storage cylinder head nut loose . May be oil seals, gaskets would damage should be replaced with new seals . If you still can not eliminate oil spills, shock absorbers should be pulled out , if they feel there is not a time card or severity , and further examination of the piston and cylinder gap is too large , the shock absorber piston rod without bending , piston rod and the cylinder surface is scratched or pull marks .
If the shock does not leak phenomenon, you should check the shock absorber connection pin, connecting rod, connecting hole , rubber bushings, etc. for damage , Desoldering, rupture or detachment of the Department . If these were normal , it should be further decomposed shock absorbers, check the piston and cylinder with the gap is too large cylinder with or without injury , the valve seal is good , valves and valve seat are tight fitting and reduce the stretching vibration absorber spring is too soft or broken , depending on the circumstances taken grinding or replacement parts approach repairs.
In addition , the shock absorber will appear in the actual use failure beep , which is mainly due leaf springs and shock absorbers , frame or shaft collision cushion shock damage or loss, and dust tube deformation , fluid lack of causes, reasons should be identified , be repaired.
Shock absorber during the inspection after the repair should be carried out in a special test rig performance test, when the resistance frequency of 100 ± 1mm ​​when its done stroke and compression stroke resistance should be specified. If liberation CAl091 done trip biggest obstacle for 2156 ~ 2646N, the biggest obstacle for the compression stroke 392 ~ 588N; Dongfeng car done trip biggest obstacle for 2450 ~ 3038N, the biggest obstacle for the compression stroke 490 ~ 686N. If there is no test conditions , we can also use an empirical approach , which uses a shock absorber rods penetrate the lower end of the inner rings , slam it ends with both feet , both hands pull on the rings back and forth 2-4 times , when great resistance when pulling up , pressed down, do not feel laborious and stretch resistance and repair than before has been restored, no air-way sense , it indicates normal shock absorber .