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Repairing Bifold Doors The hardware that connects the bifold doors can deteriorate over time. Cleaning and lubricating the mechanism (including the locks) can keep them running smoothly and efficiently. Of course, the issue is easily fixed. This guide will show how to fix your bifold door if it becomes difficult to open or close. Cracked Pivot Pins A bifold door is comprised of two panels that move across a track that runs through the floor and head jambs. They pivot using pins in the corners of one panel clo