rollers for patio sliding door

Please see if you can identify them. Each side of the door has double rollers. They are adjustable but the screws are frozen. I don't know how to take them off, I removed the one mounting screw on the edge of the door, above the adjustment hole, but the roller assembly didn't budge.

If you can't identify them unless removed please let me know how to do it.

Another option might be some penetrating oil, since the rollers don't appear worn beyond use.

thanks

Looks more like 81-164. The dimples are probably keeping the roller locked in place. Like Paul said, the roller should slide out the end. Use a block of wood and mallet to knock it off the glass. Make sure the rubber gasket is wrapped onto the glass and tap it back on.