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How to Repair a Bifold Door Top Pivot The top pivot of a bifold closet door can become loose and scratch the floor. This can be fixed by loosening the screw that holds the top bracket. The top pivot pin is a screw made from metal that is fitted into a plastic cap that has an end that is lipped and stays within the track, above the door. You'll also require a screwdriver, or perhaps two pliers. Take off the pin at the bottom. Bifold doors are ideal for saving space in a closet however, they can begin to slid