old late 70's early 80's metal glass slider

i have to preface this by saying it was really hard to get the wheel assembly out. it was filthy and the visibility was bad.  the outer assembly had a screw holding it to the bottom frame so we kind of bent every thing up before realizing there was a screw. the outer assemblu got mangled. the wheel had broken free and the door was hard to open and close.  thank you so much for your help.