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How to Repair Bifold Door Top Roller Guide If your bifold doors have become stuck, they probably need a little maintenance. It is possible that you need to clean or lubricate them, or even adjust them. The issue could be caused by a loose bolt on the top pivot, or by the top guide roller. This kit contains all the hardware you need to restore your bi-fold wardrobe door system to its best performance. Remove the Door It may seem complicated and difficult to install a set of