Wow, I didn't know it was such a problem for folks!
I drain the tank, attach the pump and with one hand holding the "cork" in I gently pump one or twice. Easy does it! For at least ten years and a few thousad sheets of film, no problem!
Isn't it amazing how successful one can be when they follow the manufacturer's instruction?
Warning!! Handling a Hasselblad can be harmful to your financial well being!
Nothing beats a great piece of glass!
I leave the digital work for the urologists and proctologists.