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How to Repair Bifold Door Top Roller Guide If your bifold doors are sticking then it's likely that they need some maintenance. They could need to be cleaned and lubricated or adjusted. The issue could be caused by an unfastened bolt at the top pivot or by the top guide roller. This kit includes all the necessary hardware to restore your bi-fold closet door system to optimal performance. Remove the Door Installing an internal set of bifold doors may seem like a complex and challeng