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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. You can correct this by loosening the set screw of the top bracket slightly. The top pivot pin is a screw made of metal that is fitted into a plastic cap that has an end that is lipped and stays within the track, above the door. You'll require a screwdriver and perhaps pliers. Remove the Bo