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How to Repair Bifold Door Top Roller Guide If your bifold doors are sticking it's likely they require some maintenance. They could need to be cleaned or lubricated, or even adjusted. The problem could be caused by an unfastened bolt on the top pivot, or by the top guide roller. This kit includes all the hardware required to return your bi-fold closet door to its best performance. Remove the Door It might seem difficult and difficult to install the bifold internal doors, but for DIYers with some expe