To make the frame and the rapid decay of the vibration of the body, improve vehicle ride comfort and comfort, vehicle suspension systems generally are equipped with shock absorbers, the current car is a widely used two-way role of cylindrical shock absorber.
Car shock absorber and treatment of common faults
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Shock absorber is the use of vehicles during wearing parts, shock absorbers work good or bad, will directly affect the smooth driving of motor vehicles and other parts of life, we should be so often in good working shock absorbers state. The following methods can test whether the work of a good shock absorber.
1. Poor road conditions make car driving on the road after 10km parking, shell shock absorber hand touch, if not hot enough, shows no resistance to the internal shock absorber, shock absorber does not work. At this point, can be added to the appropriate lubricant, and then to test if the case of fever, compared with an internal shock absorber in oil, should add a little oil; otherwise, indicating shock absorber failure.
2. Press firmly on the bumper, and then release, if the car has 2 or 3 times jump, it indicates the work of a good shock absorber.
3. As the car slowly driving and emergency braking if the vehicle vibration more intense, indicating shock absorber problem.
4. Remove the shock absorber to its upright, and the bottom of the connecting ring in the vise on the folder, pull compression damping rod a few times, then the resistance should be stable, upward pull (recovery) of the resistance should be greater than the downward resistance when pressure, such as resistance to unstable or no resistance may be an internal shock absorber valve parts lacking fuel or damage should be repaired or replaced.
In identifying a problem or failure, after shock absorbers, shock absorber should first see whether the oil spill or traces of old oil spills.
Seal gasket, sealing gasket rupture damage, loose nut oil storage cylinder head. May be the oil seal, gasket failure damaged should be replaced with new seals. If you still can not eliminate the leak, should pull out the shock absorber, if there was not a time card or severity, and then further examine the piston and cylinder is too large gap between, whether the shock absorber piston rod bending, piston rod whether the cylinder surface and scratch or pull marks. If the damper does not leak
phenomenon should check the shock absorber connection pin, with Extension Bar Connecting hole, rubber bushings, etc. for damage, loose weld, break or fall off of the office. If the examination was normal, should be further broken down shock absorbers, check the piston and the cylinder gap between the tie is too big cylinder with or without injury, the valve seal is good, the valve flap and valve seat are tight fitting and Dilatation spring shock absorber is too soft or broken, depending on the circumstances or for grinding parts to approach repair.
In addition, the shock absorber in the issue will appear in the actual use of the sound of failure, mainly due to shock absorbers and leaf springs, frame or shaft collide, pad damage or loss, and shock absorber dust tube deformation , lack of oil causes, the reasons should be identified, to be repaired. After the inspection, repair
shock absorber should be specifically Test On performance tests, when the resistance when the frequency of 100 1mm, stroke and compression stroke in stretch resistance should be specified. If the biggest obstacle to the liberation of CAl091 done trip to 2156 ~ 2646N, compression stroke the biggest obstacle for the 392 ~ 588N; Dongfeng car done the biggest obstacle to travel 2450 ~ 3038N, compression stroke the biggest obstacle for the 490 ~ 686N. If there is no test conditions, we can use an empirical approach that penetration of shock absorber with a iron bar in the bottom of the rings, with your feet tread on the ends, pull both hands back and forth on the rings 2 to 4 times, when pull up resistance when the great downward pressure without feeling and strenuous, and resistance to stretch compared with before repair has been recovered and no air-way sense of shock absorbers is that normal.