Changing the Steering Pump shaft seal?

I have a 1982 Chevy S10 that had a leak coming from the power steering pump. Well before I decided to shell out 80 dollars for a rebuilt one I decided to find the leak myself. With the pulley pulled it is certain the shaft seal is leaking. Problem I have is now trying to figure out how to pull the old seal out so that I can replace it with the new one I have. Any suggestions are greatly appreciated!Changing the Steering Pump shaft seal?
Buy, rent, or borrow a seal puller that looks like this.

http://hdtools.co.uk/family/albums/album

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