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Repairing Bifold Doors The hardware that is used to hold the bifold doors together will deteriorate over time. Cleaning and lubricating the mechanisms (including the lock) will keep them functioning smoothly and efficiently. Often, the problem is a small issue that can be fixed easily. This guide will show how to fix your bifold door when it becomes difficult to open or shut. Cracked Pivot Pins A bifold door is comprised of two panels that move along a track within the floor and head jambs. They pivot around pins that are placed in the corners