225 RH track load check replacement

So I knew I had a leak in the valve body somewhere and finally took a few minutes to track it to the load check on the RH track circuit. Nothing wrong with the valve, just needs an oring apparently. I cleaned out the pocket where it screws in and it slowly fills back up. It looks like it will be damn tight to squeeze by the main oil supply line block. I might be so inclined to just grind on the side of the main supply block a touch to eliminate having to pull that line.

Question is, how much oil am I going to lose pulling the load check and how do I confirm pressure is off of it before pulling?

Let the pressure out of the tank, then close the cap. You could block the supply line from the pump with a piece of shim stock clamped under the hose end. That way you could reseal the block too. You will still lose some oil.
Later Bob

Bob, I am ok with losing "some" but more concerned about a continuous gusher that I cannot stop. I would rather not break open the main supply for fear the seal will then fail. Of course I should first see if that valve is tight. So many things that rattled loose that, just maybe.

Really hard to see with the diagrams but looks like the if the spool is in neutral position, oil would flow up from the center port from the valve from direct acting pressure from the main supply? IE a direct path from the main supply to the bottom of the load check?