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How to Repair Bifold Door Top Roller Guide If your bifold doors are sticking then it's likely that they need some maintenance. They may need to be cleaned and lubricated or adjusted. The problem could be caused by loose bolts on the top pivot or by the top guide roller. This kit contains all the hardware needed to restore your bi-fold closet door system to optimal performance. Remove the Door Installing a set of internal bifold doors may seem like a complex and challenging task but it's actually simple fo