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Repairing Bifold Doors The hardware that is used to hold the bifold doors together can deteriorate over time. Cleaning and lubricating all the mechanisms (including the lock) can keep them working smoothly and efficiently. Often, the problem is minor and can be easily fixed. This guide will show you how to fix your bifold doors if they become difficult to open or close. Cracked Pivot Pins A bifold door is made up of a pair of panels that slide along a track installed in the head and side jambs or floor.