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How to Repair a Bifold Door Top Pivot A bifold closet door's top pivot can become loose and scrape along the floor. This can be fixed by loosening the set screw for the top bracket slightly. The pivot pin on the top is a screw made of metal that is fitted into a plastic cap with an lipped end that is inside the track above the door. You'll also need a screwdriver, or perhaps two pliers. Remove the Bottom Pin Bifold doors can be a great way to save spac