I took out the seal easily with a borrowed seal remover. Getting the new one in was a lot more difficult, mostly because the surface of the housing that it is meant to go into was buggered up some, not by me though. . Will bolt the shaft back up and run the motor in gear for awile on the stands and see if there are any leaks.
My mechanic friend says there is a tool available at the parts stores, that looks a lot like a grease gun. The plunger acts like a giant syringe, and he thought if I put a heat lamp on the pumpkin overnight that could work to get most of the fluid out. Will give that a try.