Travel the car on a bad road for about 15 kilometers. Stop and inspect it. Touch the shock absorber with your hand. If you don't feel hot, it means there is no resistance, and it has no damping effect. If the temperature of two shock absorbers is high and low, a large difference between them indicates that the resistance at low temperature is small. Shock absorbers do not have resistance. They may be oil-deficient, or important parts of them may have been damaged. Damaged shock absorbers should be removed for inspection. The inspection method is to stand the shock absorber upright and clamp the lower end of the connecting ring onto the vise. Pull the shock absorber rod a few times hard and it should have stable resistance. The pull (resilience) resistance should be greater than the resistance to downward compression. If the resistance is unstable or non-resistive, it may be due to lack of oil or damage to the valve parts and the need to repair or replace parts. It is worth noting that the disassembly and oil filtration should be performed before refueling, and the oil seal must be replaced at the same time when replacing the damper center rod, and the replacement of the valve parts should be replaced in pairs.
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