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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. This can be fixed by loosening up the screw that holds the top bracket. The top pivot pin is made of a metal screw which fits into a plastic cap that has a rounded end and remains in the track above the front door. You'll also need a screwdriver, or perhaps an assortment of pliers. Remove the bottom pin Bifold doors are ideal for saving space