(1) Inspection of the front shock absorber damper. The front shock absorber damper should be fixed during inspection, and there should be a certain resistance when moving the piston rod up and down, and the upward resistance is greater than the downward resistance. If the resistance is too large, check whether the piston rod is bent. If there is no resistance, it means that the front shock absorber damper oil has leaked or failed and must be replaced.

When the vehicle is running, the defective shock absorber will emit impact noise, so the shock absorber should be replaced. The shock absorber is a maintenance-free mechanism. If there is a slight oil mark on the outside, it does not need to be replaced. If there is a large amount of oil leakage, when it is compressed or pulled open, it will cause a beating phenomenon, because the shock absorber can not be refueled. Replace the front shock absorber damper as a whole.

(2) Inspection of front shock absorber suspension bearings and rubber stoppers. First, check the wear and damage of the front shock absorber suspension bearing, it should be able to rotate flexibly, and only replace it as a whole; check the damage and aging of the rubber stopper and replace it in time;

(3) Inspection of the front shock absorber coil spring. The damper coil spring should be inspected for damage and deformation, and the free length of the coil spring should be measured. If the length of the standard damper is reduced by 5%, it means that the coil spring has been permanently deformed and must be replaced. At the same time, the two springs on the left and right sides should be replaced to maintain the same height on both sides of the vehicle. If there is a crack on the coil spring, it must be replaced.