Zebrafive
Super Member
The valve on the pounder is indeed casted with 550. This is a red valve, their oldest one and they no longer sell parts for it. They did suggest that the manufacturer of the valve may still make or have parts for it, but i didnt pursue that avenue. Im just going to run it with the valve thats on it and close the valve for the remote hydraulics in between posts.
From the casting number it's an open center valve. Since you know the brand of the valve, see if a closed center plug is made for the valve. I doubt it, since they have a different casting number for a closed center valve.