When it comes to shock absorbers, I believe many people know that in order to make the car have comfort, integrity, stability, comfort and installation during driving, a good impact is normal working and working conditions, which directly affects the life of the car during smooth driving. Check whether the pneumatic ball valve works well as follows:
After a vehicle stops on a 10km bumpy road, touch the shock absorber housing with your hand. If the internal resistance of the thermal shock absorber is not enough, and there is no pneumatic ball valve, and the pneumatic ball valve works, you can add appropriate lubricating oil. When going through the previous steps, the pneumatic ball valve does not work. If the housing is not available or the thermal pneumatic ball valve is broken, otherwise, add enough lubricating oil to the internal pneumatic ball valve oil. Another method is to force the bumper to release. If the car has two or three jumps, this will indicate that the pneumatic ball valve works well, otherwise, the pneumatic ball valve may be broken.
When the car decelerates and emergency braking occurs, the car will vibrate violently, which indicates that the pneumatic ball valve may be broken.
What is a pneumatic ball valve that can be removed from the upright position and connected to the lower end of the hoop, and the pull rod vibrated and pressed several times, at this time there should be a stable resistance to pull out more than the downward resistance. If the resistance is unstable or may be damaged without resistance, the pneumatic ball valve is short of oil or the valve parts should be replaced or repaired. When determining whether there is a problem with the pneumatic ball valve, first check whether the shock absorber has any traces of oil leakage. The oil seal washer and sealing washer are broken and damaged, and the fuel tank cap nut is loose. The oil seal and sealing washer may be damaged. Replace them with new seals. If the oil leakage cannot be eliminated, the pneumatic ball valve shall be pulled out. If it feels heavy, it will further check whether the clearance between the piston and the cylinder is too large, whether the piston rod of the pneumatic ball valve is bent, and whether there are scratches or scratches on the surface of the piston rod and the cylinder. If the pneumatic ball valve has no leakage, check whether the connecting pin, connecting rod and connecting hole of the pneumatic ball valve are damaged, welded, cracked or fallen off. If the inspection is normal, further disassemble the pneumatic ball valve, check that the clearance between the piston and the cylinder is too large, and the cylinder is pulled, The valve is well sealed, the valve disc is closely attached to the valve seat, and the pneumatic ball valve is too soft or broken with the pull ball valve. The method of grinding or repairing this situation is adopted.
Finally, noise failure will occur during the final use of. This is mainly due to the damage or falling off of pneumatic ball valve and steel plate ball valve, frame or shaft, cushion, deformation of pneumatic ball valve dustpan, lack of oil and other reasons.
We should find out the cause and fix it. The shock absorber shall be tested on a special test bench after maintenance. When the resistance frequency is 100 ± 1mm, the resistance of tensile stroke and compression stroke shall meet the requirements. For example, cal091 travel has a large resistance of 2156~2646n, a large resistance of 392~588n for compression travel, 2450~3038n for Dongfeng Motor, and 490~686n for compression travel. If there is no experimental condition, we can also use the empirical method. This is connected to an iron rod inserter ring, step on both ends of it with your feet, and pull 2~rings with your hands for 4 times to fix it. When the pressure of the pull-down resistance is great, when they don't feel hard, but the recovery of the tensile resistance has no sense of history compared with before the repair, it indicates that the shock absorber is normal