Don't give up so easily, you can buy all the tools you need for less than a trip to the dealer. If you don't have access to an air hammer use a long drift (piece of rebar will work) and hit the nut on the right side of the flat real hard a couple times with a hand sledge, it will come right off with a 1-7/16" wrench and pair of large water pump pliers to hold the pulley then. I've always been able to pull the entire assembly out the top without taking it apart, it is sort of a trick but it will come out without removing anything else.