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How to Repair a Bifold Door Top Pivot The top pivot can be loosened and scrape the floor. You can correct this by loosening the set screw on the top bracket a bit. The top pivot pin is made of a screw made of metal that is inserted into a cap made of plastic which has a rounded end and is positioned above the front door. You'll also need an screwdriver and perhaps a pair pliers. Take off the pin at the bottom. Bifold doors are great to save space in a closet but they may begin