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How to Repair Bifold Door Top Roller Guide If your bifold door is squeaking it's likely they require some maintenance. They could need to be cleaned or lubricated, or even adjusted. The problem could be caused by an unfastened bolt on the top pivot or by the top guide roller. This kit comes with all the necessary hardware to return your bi-fold closet door to optimal performance. Take the door off It may seem complicated and challenging to put in a set of bifold internal doors however for