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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. It is possible to fix this by loosening the set screw for the top bracket. The top pivot pin is a screw made of metal that is inserted into a plastic cap that has a lipped end that stays in the track just above the door. You'll also need a screwdriver, or perhaps a pair pliers. Remove the Bot