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How to Repair a Bifold Door Top Pivot The top pivot of bifold doors can become loose 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 from metal that fits into a cap made of plastic with a lipped end that stays in the track just above the door. You'll also require a screwdriver, or perhaps two pliers. Take off the Bottom Pin The bifold doors can be the ideal option to make space in your closet, however as time passes, they could begin to sag against the floor, o