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How to Repair a Bifold Door Top Pivot The top pivot could be loosened and scrape the floor. This can be fixed by loosening the set screw on the top bracket slightly. The top pivot pin is a screw made from metal that fits into a cap made of plastic with an lipped end that is in the track just above the door. You'll also need an screwdriver and perhaps an assortment of pliers. Remove the bottom pin The bifold doors can be the ideal option to make space in your closet, but over time they may start to slide against t