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How to Repair a Bifold Door Top Pivot The top pivot of bifold doors can become loose and scratch the floor. This can be fixed by loosening up the set screw on the top bracket. The top pivot pin is a screw made of metal that is inserted into a cap made of plastic with a lipped end that stays inside the track above the door. 'll need a screwdriver and possibly a pair of pliers. Remove the bottom pin The bifold doors can be an excellent way to save space in your closet, however over time they may sta