valve in power steering pump. help asap

so ive got a pump here that i installed in my quest for a quiet power steering pump, and i accidentally pulled the valve out of one, when you push this valve that goes in the hole for the pressure hose, is it possible to reinstall it? how far in should you push it? it seems to go in 3 inches or so? shaolin crane said it was impossible to get one to work after thats been out, but wasnt quite sure. anyone know of a site of a breakdown of these pumps and where that valves supposed to go?

what fluid really should be used? type f or ps fluid?