Removing old rollers
A quick learner from Westchester says:
August 6, 2011
My rollers look somewhat like 84-016 but it doesn't have the thin L shaped thing sticking out on top. Instead it has a flat tension strip that is an inch and a half by one quarter inch that keeps it tucked on. I don't know how to remove it from the screen door so I can take a picture of it. There is a screw at the corner which I unscrewed but the roller assembly doesn't come out. The roller is metal and it is 1 and a quarter inch.
Dave from SWISCO responded:
August 8, 2011
I do not believe the shape of the spring will effect the roller operation. Removing the old roller is another story. It can be very difficult to remove. You already did the first step by removing the adjustment corner screw. Next you will need a small screw driver to spread the wheel housing off of the corner pins and use a long nose pliers to pull out the wheel. It is a little tricky, but not impossible. Best way would be to take the patio screen completely apart to at the wheel. However that would be more work.
A professional from ace hardware Sioux Falls SD says:
November 14, 2011
use a 3/16 daiameter screw driver, push in to spread pivot hanger apart, then you can remove the sassembly. Assemble on reverse order. Have done many of them.