Dave Sr. from SWISCO responded:
November 26, 2014
Acorn made a few different series patio doors and each series had a different type roller. In some cases the same series had different rollers. You will need to remove the rollers from the door to identify which roller you need to make your repair. In the meantime, I have compiled a list of possibilities. No guarantees, but you may be interested in looking them over. Take a look at the right hand side of this page to view my list.
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