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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. You can correct this by loosening the set screw for the top bracket slightly. The top pivot pin is made of a metal screw which fits into a cap made of plastic which has a rounded top and remains in the track above the front door. You'll require a screwdriver and perhaps pliers. Take off the Bottom Pin Bifold doors are a great way to save space in your closet, but over