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How to Repair a Bifold Door Top Pivot The top pivot can be loosened and scrape the floor. This can be fixed by loosening up the screw that holds the top bracket. The pivot pin on the top is a screw made of metal that fits into a plastic cap with a lipped end that stays within the track, above the door. You'll need a screwdriver and perhaps pliers. Remove the Bottom Pin Bifold doors can be an excellent option to make space in your closet, however in time, they can begin to sag against the floor, or even fall ou