In order to make the frame and the vibration of the body decays rapidly, improve ride comfort and comfort, vehicle suspension systems are generally equipped with shock absorber, is widely used on the vehicle is a two-way adjustable shock absorber.
The shock absorber is used in the process of automobile spare parts, shock absorber work is good or bad, will directly affect the car stationarity and other parts of life, so we should make the damper often is in good working condition. The following methods can be used to check whether the shock absorber works well.
1 to make the car on the road conditions are poor on the road after the 10km parking, touch the shock absorber shell, if not hot, indicating that the shock absorber without resistance, shock absorber does not work. At this point, can be added to the appropriate lubricating oil, and then the test, if the shell heat, the shock absorber for the lack of oil, should be sufficient oil; otherwise, that the shock absorber failure.
2 press the bumper, and then release, if the car has 2 to 3 jumps, indicating that the shock absorber works well.
3 when the car slowly driving and emergency braking, if the car vibration is more intense, indicating that the shock absorber is a problem.
4 remove the shock absorber and the lower end of the upright, the connecting ring clamped in a vise, pull rod vibration pressure several times, at this time should have a stable resistance to pull (recovery) resistance should be greater than the downward pressure resistance, such as resistance instability or no resistance, damage may be a shock absorber oil or the valve parts, should replace or repair parts.
In determining the North Baotou heavy duty truck parts shock absorber has a problem or failure, should first check whether the shock absorber oil spills or traces of old oil spills.
Baotou North Heavy Duty Truck oil seal gasket, seal gasket rupture damage, oil cylinder cover nut loose.
If the oil leakage is found, first tighten the oil cylinder head nut, if the shock absorber is still leaking oil, it may be oil seal, seal gasket damage failure, should replace the new seal. If you still can not eliminate oil leakage, should pull the vibration rod, if there was not a hairpin or weight, then check the gap between piston and cylinder is too large, the shock absorber piston rod is bent, the piston rod and the cylinder surface is scratched or stretch marks.
If the damper no leakage phenomenon, it should check the shock absorber connecting pin, a connecting rod, a connecting hole, such as whether there is damage to the rubber bushing, welding, crack or fall off. If the examination is normal, should be further decomposed with shock absorber, check the gap between piston and cylinder is too big, the cylinder is pulled, the valve seal is good, and the valve seat valve joint is tight, and the tension spring damper is too soft or broken, take the grinding or change the way repair according to the situation.
In addition, the shock absorber will appear fault noise in actual use, this is mainly due to the collision and shock absorber plate spring and frame or shaft, pad damage or loss as well as the shock absorber cylinder deformation caused by dust, oil shortage, should identify the reasons for repairs.
Baotou North heavy duty truck parts shock absorber in the inspection and repair should be carried out in a special test bench performance test, when the resistance frequency of 100 + 1mm, the resistance of the stroke and compression stroke should be consistent with the provisions of the. If there is no experimental conditions, we can also use an empirical approach, which is connected with an iron rod into the damper rings, with their feet stepped on its ends, the hands hold the rings on the reciprocating pull 2 to 4 times, when to pull down the pressure of great resistance, when they do not feel laborious, but the tensile resistance is recovery compared with the repair, no sense of history, shows that the shock absorber is normal.