https://wifidb.science/wiki/5_....Bifold_Door_Glass_Re
How to Repair a Bifold Door Top Pivot A bifold closet door's top pivot could be loosened and scrape the floor. It is possible to fix this by loosening the set screw on the top bracket slightly. The top pivot pin is a metal screw that is inserted into a plastic cap with a lipped end that stays inside the track above the door. You'll need a screwdriver, and perhaps pliers. Take off the pin at the bottom. Bifold doors are ideal for maximizing space in closets but they may begin to sag or scrape