Common fault automobile shock absorber

Common fault automobile shock absorber To make the vibration of the frame and the rapid decay of the body, improve vehicle ride and driving comfort, vehicle suspension systems generally are equipped with shock absorbers, the car is currently widely used is the bi-acting tube damper.
Car shock absorber is used in the process of wearing parts, shock absorbers work good or bad, will directly affect the smooth running car and other parts of life, so we should make shock absorbers in good working condition always. The following methods can test whether the work of a good shock absorber.
1. Poor road conditions make the car driving on the road stop after 10km, touch shell shock absorber, if not hot enough, indicating no resistance to the internal shock absorbers, shock absorbers do not work. At this point, can be added to the appropriate lubricant, and then to test if the shell fever, compared with an internal shock absorber oil, should add a little oil; otherwise, indicating the shock absorber failure.
2. Press down firmly on the bumper, then release, if the car has 2 or 3 times jump, then the shock absorbers work well.
3. When the car slowly driving and emergency braking, if more severe vehicle vibration, indicating the shock absorber problem.
4. Remove the shock absorber to be upright, and the bottom of the folder in the vise on the connecting ring, tension and compression damping force lever several times, then there should be a stable resistance, pull up (recovery) should be greater than the resistance down pressure the resistance, such as resistance to unstable or no resistance may be short of oil within the shock absorber valve parts or damage should be repaired or replaced.
In determining the shock absorber problems or failure, it should first check whether the shock absorber oil or traces of old oil.
Seal gasket, sealing gasket rupture damage, oil storage cylinder head nut loose. May seal, gasket failure damaged, replace a new seals. If you still can not eliminate the leak, should pull the shock absorber, if they feel there is not a time card or severity, further examination of the piston and cylinder gap is too large, whether the shock absorber piston rod bending, piston rod cylinder surface and whether scratch or pull marks.
If the shock absorber phenomenon does not leak, you should check shock absorber connection pin, connecting rod, connection holes, such as whether there is damage to the rubber bushing, sealing off, break or fall off place. If the examination was normal, should be further broken down shock absorbers, check the piston and cylinder with the gap is too large, cylinder with or without injury, the valve seal is good, fit the valve and valve seat is tight, and done spring shock absorber is too soft or broken, where appropriate, adopt or grinding method for repair parts.
In addition, the shock absorber will appear in the actual use of the failure to issue sound, mainly due to shock absorbers and leaf springs, frame or shaft collide, damage or loss, and shock absorber pad dust tube deformation, fluid lack of other causes, reasons should be identified, to be repaired.
Shock absorber after the inspection, repair work in a special test stand performance test, the resistance frequency of 100 ± 1mm, its done and the compression stroke stroke resistance should be specified. As the biggest obstacle to the liberation of CAl091 done trip to 2156 ~ 2646N, compression stroke the biggest obstacle for the 392 ~ 588N; Dongfeng car trip done the biggest obstacle for the 2450 ~ 3038N, compression stroke the biggest obstacle for the 490 ~ 686N. If there is no test conditions, we can also use an empirical approach, which uses an iron bar penetration shock absorber lower rings, the legs slam with its two ends, pull both hands back and forth on the rings 2 to 4 times, when great resistance when pulling up, not down when the pressure was laborious, but the resistance to stretch has been restored with the repair than before, no sense of air-way, then the shock normal.