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How to Repair a Bifold Door Top Pivot The top pivot of the bifold closet door could become loose and scratch the floor. This can be corrected by loosening the set screw on the top bracket. The top pivot pin is made of a screw made of metal that is inserted into a plastic cap that has a rounded top and is positioned above the front door. You'll also need a screwdriver, or perhaps a pair pliers. Remove the bottom pin The bifold doors can be an excellent option to maximize space in your clos