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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. They might need to be cleaned or lubricated, or even adjusted. The problem could be caused by loose bolts on 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 difficult to set up the bifold internal doors but for DIYers with some experienc