Dave Sr. from SWISCO responded:
November 29, 2016
Looking at your second photo, there appears to be a plug in the face of the lower door stile, perhaps meant to cover an adjustment screw for your rollers. Without seeing the roller out of the door we can't be sure, but take a look at the 81-018 roller to start out. This could be one used on your door, but no real way to know without seeing the old one.
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