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Repairing Bifold Doors The hardware that connects the bifold doors can deteriorate over time. Cleaning and lubricating the mechanism (including the locks) will ensure that they run smoothly and efficiently. Most of the time, the issue can be solved easily. 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 consists of two panels that slide across a track that runs through the floor and head j