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How to Repair Bifold Door Top Roller Guide If your bifold door is sticking it's likely they need some maintenance. It is possible that you need to clean, lubricate or adjust them. The issue could be caused by an unfastened bolt on the top pivot, or by the top guide roller. This kit comes with all the hardware required to return your bi-fold closet door system to optimal performance. Take the door off It may appear complicated and difficult to set up an internal set of bifold doors, but for DIYers with a little e