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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 a bit. 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 need a screwdriver, and possibly a pair of pliers. Take off the Bottom Pin The bifold doors can be an excellent way to save space in your closet, but as time passes, they could begin to fall off the floor, or pop out of brackets. The good thing is