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How to Repair a Bifold Door Top Pivot The top pivot of the bifold closet door could become loose and scratch the floor. This can be fixed by loosening the set screw of the top bracket a bit. The top pivot pin is a screw made of metal that is fitted into a plastic cap that has an lipped end that is in the track just above the door. You'll require a screwdriver and possibly a pair of pliers. Take the Bottom Pin off Bifold doors can be a great option to make space in your closet, but in time, they can begin