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How to Repair Bifold Door Top Roller Guide If your bifold door is squeaking, it's likely that they require some maintenance. You may have to clean and lubricate them or adjust them. The issue could be caused by a loose 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 system to optimal performance. Remove the Door It may seem complicated and challenging to put in an internal set of bifold doors, but for DIYers