How to remove PS box

There's a dust cap covering the lower seal, then a snap ring, then the seal itself. Too late now but... Hydraulic pressure would have blown this seal right out into a drain pan before the box was removed.
Sometimes I will run a small screw into a old seal, pull the screw to pull the seal.
Tiny O ring? Not sure. I'm thinking the centering valve atop the box has 2 O rings under it.
Bushing at the pitman arm? I'm drawing a blank here. Some aftermarket vendors offer replacement grease boots for various suspension parts.