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Repairing Bifold Doors The hardware that holds the bifold doors together will deteriorate over time. Cleaning and lubricating the mechanisms (including the lock) can keep them working smoothly and efficiently. Of course, the issue can be solved easily. This guide will help you understand how to repair your bifold doors when they become difficult to open or close. Cracked Pivot Pins A bifold door is a set of panels that slide on tracks that are installed in the head and side jambs or floor. Th