Cabin shock absorber is a kind of cord reinforced rubber capsule, filled with compressed air, using the compressibility of gas to play the role of spring damping rubber products, long pillow type, gourd type and diaphragm type. If the shock absorber is too soft, the car will jump up and down, and if the shock absorber is too hard, it will bring too much resistance, preventing the spring from working properly. In the modification process of the suspension system, the hard shock absorber should be matched with the hard spring, and the hardness of the spring is closely related to the weight of the car, so the heavier car generally uses the hard shock absorber. A device connected to a shock - induced crankshaft to counter torsional vibration (the twisting of the crankshaft by the impact of cylinder ignition). If there is no oil leakage of the top ten shock absorber, the bushing should be checked for damage, diswelding, rupture or falling off. If the above check is normal, should be further decomposed shock absorber, check whether the fitting clearance between the piston and cylinder is too large, a cylinder with and without strain, valve seal are in good condition, whether the disc and seat nicely, and whether the presence of shock absorber spring is too soft, or broken, according to check the shock absorber connecting pin, connecting rod, connecting hole grinding, rubber, the circumstance or change a way to repair.