I have an older Maravia with a broken AD-2 valve. Other threads on MB mention retrofitting a military valve into the boot. I am going to replace mine with an AD-2 valve from a thwart that I never use.

 

13x6 sounds like a Spider, I am pretty sure that's the dimensions for the Super Puma and the Spider was a "clone"

 

Found out from Maravia is was a custom New Wave 2.

As far as removing the AD-2 valves - any chance someone around here has an old wrench for one of these?

 

Guess I could just buy a 2" socket

 

Problem 1 - I tried making a tool and using channel locks to remove my broken AD 2 valve. Neither worked. I bought a 2 inch socket. It was too meaty to fit between the boot and the valve so I had a machine shop turn it down to fit. The valve came out without too much torque.

Problem 2 - I didn't check to verify that the thwarts also had AD 2 valves. Turns out Maravia use military valves. I am still going to steal one to replace the AD 2 valve on the raft tube. I don't want to cut out the boot and replace it with another valve. Anybody have other ideas?

 

I had a 1-1/2" socket at home and it ended up working to remove the valves. One of the points grabs the dimple on the valve where the cap attaches. I don't think this is a good long term solution, since it'll eventually wear out and limits the torque you can put on it, but was an easy method to inspect and clean them.