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How to Repair a Bifold Door Top Pivot The top pivot of the bifold closet door could become loose and scrape the floor. This can be corrected by loosening the screw that holds the top bracket. The pivot pin on the top is a screw made of metal that is fitted into a cap made of plastic with an lipped end that is inside the track above the door. You'll also require a screwdriver, or perhaps a pair pliers. Remove the bottom pin The bifold doors can be an