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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 the set screw on the top bracket. The top pivot pin is made of a metal screw which fits into a cap made of plastic which has a rounded end and stays in the track above the front door. You'll need a screwdriver and possibly a pair of pliers. Take the Bottom Pin off Bifold doors can be the ideal option to make space in your closet, but over time they may start to slide against the floor