1. Stop the car after driving 10km on the road with poor road conditions, touch the JA type damping ball valve pneumatic ball valve shell with your hand. If it is not hot enough, it means that there is no resistance inside the JA type damping ball valve pneumatic ball valve, and the JA type damping ball valve pneumatic ball valve does not work
At this time, appropriate lubricating oil can be added and the test can be carried out again. If the shell is hot, the pneumatic ball valve is short of oil inside, and it should be filled with enough oil; Otherwise, JA type damping ball valve pneumatic ball valve is invalid
2. Press the bumper firmly and then release it. If the car jumps 2 to 3 times, the pneumatic ball valve works well