How to access these rollers?

Below are dimensions and pictures attached ​​of my doors and track.
I believe to change the rollers on these doors the vertical end caps have to be removed, correct?
The pictures of the bottom track you will see toward the end groves starting to form. Also, just a thought but do you think it's possible the screen doors have the same rollers as the glass doors because they are easy to remove from the complete door assembly.

Approximate Measurements:

87" Tall
70" Wide
Track - 6"