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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 mechanism (including the locks) will ensure that they run smoothly and efficiently. Often, the problem is something small that can be easily fixed. This guide will teach you how to fix your bifold doors if they become difficult to open or close. Cracked Pivot Pins A bifold door is a pair of panels that slide along tracks that are located in the head side jambs or floor