"Where can I find instructions for replacing a typebar correctly?"
What part of the process are you unsure about?
You know how to get the type basket out and of the rails?
I had all my type bars out. I took pictures.
No need to remove that curved bar they pivot on but if you do it is held in by set screws.
To remove the type bars without taking out the curved bar just remove the guide that the ink ribbon
runs through and it will allow the type bar to come forward far enough to come out.
I also had to remove the bracket that holds the rubber backstop that the type bars rest against.
Yes getting the type bars to mesh with the draw bars is a little tricky but after doing a couple it gets easier.
If it is off a notch in one direction or the other you will know.
If you remove those set screws that hold the curved bar be careful.
Mine were mushroomed out on the ends and when I removed them they in turn deformed the slots
on either side and caused the adjacent type bars to stick.
Best just to leave that curved bar alone unless there is no other choice.
-Steve