Adjustment of Schuco sliding patio doors
We've had these Schuco triple-pane patio doors for several years now. Sliding them has never been easy, but now that I have carpal injuries to both my forearms it's near impossible.
I know that they have an adjustable roller down at the bottom, but unfortunately, I don't think the company that did the installation left any information, and I think they're out of business. I understand that Schuco sold their window division, too.
Are there any Schuco owners out there who can tell me how to adjust these things, and what tool is required? Any assistance would be very much appreciated!