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How to Repair Bifold Door Top Roller Guide If your bifold doors have become stuck and squeaking, they may require a little attention. You may have to clean or lubricate them, or even adjust them. The problem could be caused by a loose bolt on the top pivot, or by the top guide roller. comes with all the necessary hardware to restore your bi-fold closet door system to its best performance. Take the door off Installing an interior set of bifold doors might appear to be a complicated and challenging project,