Delta 400
Kathleen
Hi there Kathleen.
Thank you for reaching out to us. Your roller reminds me of the 81-047, 81-289, and 81-300. I recommend you review our specifications and compare them with yours to see if any of them match up.
Please let us know if you have any questions or note any discrepancies.
To access the roller, you will need to remove the bottom rail from the sliding patio glass door. Please refer to the related video below for guidance on how to remove the bottom rail from the door. While the featured roller is held in place with a set pin, your roller is secured by "ears" at the back end. To remove the roller, you will need to spread the end of the door rail to allow the roller to come out.
In our experience, the bottom rail has to be removed to access the roller assembly.