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How to Repair a Bifold Door Top Pivot A bifold closet door's top pivot could be loosened and scrape the floor. This can be corrected by loosening up the set screw on the top bracket. The top pivot pin is an iron screw that fits into a plastic cap that has a rounded edging and stays in the track above the front door. You'll require a screwdriver and possibly pliers. Take off the pin at the bottom. Bifold doors can be an excellent option to make space in your closet, however over time they may star