Yep. It's pressed in, and should just need some careful levering or tapping out. It's main purpose is to spread the load when the shock bottoms out.
Below that is a round section snap-ring which will be a bitch to remove - you'll need a nice sharp scribe (or similar) to get underneath the end of the snap-ring to lever it out. I've got two old screwdrivers that've been sharpened on the grinder (and one has been bent) to help get the snap-rings out. Everytime I used them, I'm paranoid of jamming one deep into my hand, but I've avoided it so far...
I built a basic but effective tool out of a couple of lengths of threaded rod and some scrap RHS, to push down the seal head, so the snap-ring can be removed.
There will be a second snap-ring under the seal head.
Then it should come apart quite easily - in fact, you'll probably wonder what all the fuss is about once you see what's in there.
Check the inside of the body for wear.