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How to Repair Bifold Door Top Roller Guide If your bifold doors are squeaking, they probably require some maintenance. They may need to be cleaned or lubricated, or even adjusted. The problem may be caused by a loose screw on the top pivot or the top guide roller. This kit contains all the hardware needed to restore your bi-fold closet door system to its best performance. Take the door off Installing an internal set of bifold doors might seem like an involved and complicated project however