You are right Kevin, That seal is not an O ring. It is lip style. Is the metal ring around the seal the part that you would pry out?
The metal ring and the rubber lip would come out together. Of course, you'll destroy it in the process of removal. The new seal would be tapped in with a socket or piece of pipe that fits over the shaft and applies pressure all around the metal part of the new seal. Sorry, I can't help with any of your other questions.
