How to open the shock absorber at the top of sliding door pulley

The damping at the top of the sliding door pulley opens after buffering and rebounding. It is suggested that the kitchen sliding door should be equipped with buffer damping. First, it can avoid the door from being strongly impacted when it is closed, prolong the service life of the sliding door, and reduce the situation of fingers being pinched. Second, it can make the sliding door close slowly and reduce the noise generated when closing the door. At the same time, it should also be noted that pulleys with buffer damping are easy to fail. Once damaged, the door can't be pulled, and the push-pull is not smooth.