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How to Repair a Bifold Door Top Pivot The top pivot can become loose and scrape along the floor. It is possible to fix this by loosening the set screw of the top bracket. The top pivot pin is a metal screw that fits into a cap made of plastic with a lipped end that stays within the track, above the door. You'll require a screwdriver and possibly a pair of pliers. Take the Bottom Pin off The bifold doors can be an excellent option to maximize space in your closet, but in time, they can begin to sag against th