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How to Repair a Bifold Door Top Pivot The top pivot of the bifold closet door could be loosened and scrape the floor. It is possible to fix this by loosening the set screw on the top bracket slightly. The top pivot pin is a screw made from metal that is fitted into a plastic cap that has an end that is lipped and stays inside the track above the door. You'll need a screwdriver and perhaps pliers. Take the Bottom Pin off Bifold doors can be the ideal option to maximize space in your cl