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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 on the top bracket. The pivot pin on the top is a screw made of metal that is inserted into a plastic cap that has an end that is lipped and stays inside the track above the door. You'll also require a screwdriver, and possibly two pliers. Take off the pin at the bottom. Bifold doors are ideal to save space in a closet however, they can