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How to Repair a Bifold Door Top Pivot The top pivot of bifold doors can be loosened and scrape the floor. It is possible to fix this by loosening the set screw for the top bracket a bit. The top pivot pin is a screw made of metal that is inserted into a cap made of plastic with an lipped end that is inside the track above the door. You'll also need an screwdriver and perhaps an assortment of pliers. Take off the pin at the bottom. Bifold doors are great for saving space in a closet however, they can beg