The shock absorber is the use of vehicles in vulnerable parts, shock absorbers work is good or bad, will directly affect the car driving smooth and other parts of life, so we should make the shock absorbers often in good working condition. The following methods can test the shock absorbers.
1. The car to poor road conditions on the road traveling 10km Parking touch the shock absorber housing, if it is not hot enough, no resistance within the shock absorber, shock absorbers do not work. Proper lubricant can be added, and then the test case of fever, compared to the shock absorber internal lack of oil, add a little oil; otherwise defective shock absorber.
2. Press firmly on the bumper, then release, then the shock absorbers work well if the car jumps 2-3.
3. When the car slowly driving and emergency braking, vehicle vibration severe shock absorber problem.
4. Remove the shock absorber upright, and the lower end of the connecting ring folder in the vise, pull compression damping rod several times, this time should be stable resistance should be greater than the downward pull up resistance (recovery) pressure resistance, such as resistance to unstable or no resistance, shock absorber internal lack of oil or damaged valve parts, repair or replacement of parts.
Determine the shock absorbers have a problem or failure should view the shock absorbers whether oil or traces of old oil spills.
Oil seal gasket, sealing gasket rupture damage, oil storage cylinder head nut loose. May fail, oil seals, gaskets damaged should be replaced with new seals. If you still can not eliminate oil spills, should pull out the shock absorber, if they feel the card issuer or the severity is not a time to further check the clearance between the piston and cylinder is too large, whether the shock absorber piston rod bending the piston rod surface and cylinder if there is a scratch or pull marks.
If the shock absorber is no leakage phenomenon, you should check the shock absorbers connecting pins, connecting rods, connecting hole, rubber bushing for damage, Desoldering, break or fall off of. If these were normal, should be further decomposed shock absorbers, check with the gap between the piston and cylinder is too large, the cylinder with or without injury, the valve seal is good, valves and valve seat are tight fitting, as well as shock absorbers stretching the spring is too soft or broken, where appropriate, adopt a way to repair the grinding or replace parts.
In addition, the damper will appear in the actual use beep fault, this is mainly due to the spring frame or shaft of the shock absorber and the steel plate collides Mountings damage or loss, and the damper dust tube deformation insufficient oil and other causes, the reasons should be identified, to be repaired.
Shock absorber during inspection repair should be dedicated test bench performance test, resistance frequency of 100 ± 1mm done trip and the resistance of the compression stroke required. Such as the liberation CAl091 done trip the biggest obstacle for the 2156 ~ 2646N, compression stroke, the biggest obstacle for the 392 ~ 588N; Dongfeng vehicles stretching stroke the biggest obstacle 2450 ~ 3038N, the biggest obstacle to the compression stroke of 490 to 686N. If you do not test conditions, we can also use an empirical approach, which uses an iron bar penetration within the shock absorber lower end rings to slam both ends with both feet, both hands on the rings reciprocating pull 2 to 4 times, pull up resistance not feel laborious downward pressure, and stretch resistance and repair recovery than before, no sense of empty drive, show that the shock absorber is almost normal.