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How to Repair Bifold Door Top Roller Guide If your bifold doors are sticking, it's likely that they need some attention. It is possible that you need to clean or lubricate them, or even adjust them. The problem could be caused by a loose bolt at the top pivot or by the top guide roller. This kit includes all the necessary hardware to return your bi-fold closet door system to optimal performance. Take the door off It may seem complicated and challenging to put in a set of bifold internal doors, but for those