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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 corrected by loosening the screw that holds the top bracket. The pivot pin on the top is a metal screw that is fitted into a plastic cap that has an lipped end that is inside the track above the door. You'll require a screwdriver and possibly pliers. Take off the Bottom Pin Bifold doors can be an excellent option to make space in your closet, but in time, they can begin to slide against the floor, or even break off f