Dave Sr. from SWISCO responded:
August 1, 2023
Hello, Based on your photos, take a look at the 81-258S shown below. This roller is held in place with two hooks at the top of the housing that goes into a cut-out in the bottom door rail. I believe if you were to use a slotted screwdriver and pry down the back end of the roller housing, it should disengage from the door. Take a look and let us know if you have any other questions. Dimensions for 81-258S
Alternate view of 81-258S
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