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How to Repair a Bifold Door Top Pivot The top pivot can become loose and scrape along the floor. This can be fixed by loosening the screw that holds the top bracket. 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 edging and stays in the track above the front door. You'll also need a screwdriver, or perhaps two pliers. Take the Bottom Pin off Bifold doors are great for saving space in a closet but they may begin to buckle or scrape the flo