Janey, thank you for your response. I printed out the manual some time ago but it seems like the information on the cams is not that important an issue overall. Seems like an add on, like “Oh, I guess we should say something about cams here”. LOL. I realize that not all the machines had cams so that is probably why.
The problem with my machine is that the cam will not go all the way down on the cam shaft even with the lever pushed to the right and the cam fitted into one of the holes. It doesn’t lock down and pops back up.