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How to Repair a Bifold Door Top Pivot The top pivot of a bifold closet door can become loose and scratch the floor. This can be corrected by loosening the set screw on the top bracket. The pivot pin on the top is a screw made from metal that is fitted into a plastic cap with a lipped end that stays in the track just above the door. You'll also need an screwdriver and perhaps two pliers. Take off the Bottom Pin Bifold doors can be an excellent option to make space in your closet, but as time passes, th