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How to Repair Bifold Door Top Roller Guide If your bifold door is squeaking then it's likely that they require some maintenance. They might require cleaning, lubricated or adjusted. The issue could be caused by a loose screw on the top pivot or the top guide roller. This kit contains all the hardware you need to restore your bi-fold wardrobe door system to its optimal performance. Take the door off Installing an interior set of bifold doors may appear to be a complicated and challenging project but