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How to Repair a Bifold Door Top Pivot The top pivot of a bifold closet door can be loosened and scrape the floor. It is possible to fix this by loosening the set screw of the top bracket slightly. The top pivot pin is made of a screw made of metal that is inserted into a cap made of plastic that has a rounded top and is positioned above the front door. You'll require a screwdriver and possibly a pair of pliers. Take off the Bottom Pin Bifold doors are an excellent option to make space in your close