Is 84-078 the correct upper roller number?

A home owner from Creekside, PA says:
I have an Andersen screen door that takes bottom roller 84-070, I am going to order 4 of these rollers and I also want to purchase 2 top rollers for the same screen door. Is 84-078 the correct upper roller number? My screen door was installed in 1977 and measures 33 1/4 by 75 1/4.
Thank You, Barry
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Donna from SWISCO responded:
Hi Barry,
I did find that Andersen used the 84-070, bottom screen rollers, with the 84-078, top rollers, in their sliding door insect screens for the Andersen Primed Gliding Doors from 1964 through 1983.
A quick learner from nj says:
I have an Anderson screen door. The bottom roller is broken. When I look at the picture it looks like 84-078. But you list is an "upper screen door roller".
Is this the one I should purchase?

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Tom from SWISCO responded:
Thanks for posting, Mike. The 84-078 is the upper roller, yes. It's possible that your door was installed upside-down. Now, I know that sounds crazy, but believe it or not this is a very common problem with this door. You may want a local handy man to come out and take a look at it.
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