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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 mechanisms (including the locks) will ensure that they run smoothly and efficiently. Most of the time, the issue can be solved 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 made up of a pair of panels that slide on tracks that are that is installed in the head and side jambs or floor