https://blogfreely.net/detaile....poch7/what-will-bifo
How to Repair a Bifold Door Top Pivot A bifold closet door's top pivot could become loose and scrape along the floor. It is possible to fix this by loosening the set screw for the top bracket slightly. The top pivot pin is a metal screw that is inserted into a plastic cap that has an lipped end that is in the track just above the door. You'll need a screwdriver, and possibly a pair of pliers. Remove the bottom pin Bifold doors can be the ideal way to save space in your closet, but as time passes,