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How to Repair Bifold Door Top Roller Guide If your bifold door is sticking then it's likely that they require some maintenance. You may have to clean and lubricate them or adjust them. The problem could be caused by loose bolts on the top pivot or by the top guide roller. This kit includes all the hardware needed to return your bi-fold closet door to optimal performance. Take the door off It may seem complicated and difficult to install an internal set of bifold doors, but for those who are DIYers with som