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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. It is possible that you need to clean and lubricate them or adjust them. The problem could be caused by a loose bolt on the top pivot or by the top guide roller. This kit contains all the necessary hardware to bring your bi-fold closet door to its best performance. Take the door off It may appear complicated and challenging to put in a set of bifold internal doors, but