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How to Repair Bifold Door Top Roller Guide If your bifold door is sticking, it's likely that they require some maintenance. You may have 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 hardware required to return your bi-fold closet door system to its best performance. Take the door off It may seem complicated and challenging to put in an internal set of bifold doors but for DIYers wit