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How to Repair a Bifold Door Top Pivot A bifold closet door's top pivot could become loose and scrape the floor. It is possible to fix this by loosening the set screw on the top bracket slightly. The pivot pin on the top is a screw made of metal that is fitted into a cap made of plastic with an end that is lipped and stays within the track, above the door. You'll also require a screwdriver, and possibly two pliers. Take the Bottom Pin off Bifold doors are g