Sliding Glass Patio Door Roller

A home owner from Mineola, Texas says:
I have a patio door that rolls but not very smoothly; about 25 years old and I imagine the rollers need replacing. On the frame is stamped DSG-86; is this a manufacturer's
Code?? Am reluctant to remove the door without being sure that replacement rollers are available.

Thx, RT
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Paul from SWISCO responded:
There may be an AAMA sticker somewhere on your door. If you can show this to me, we could identify the manufacturer. However, that may only narrow down the list of possible replacements, and even then it'd be an educated guess. The only way to know for sure what roller you have is to see the current one removed.
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