Oring mystery might be solved...

When I took the gear out of my steering cylinder I found what I thought was the &quot;quad ring&quot; between the gear and the flat surface that the gear rests on when installed. I left that one alone for future reference. With this removed I saw another oring in a groove at the bottom of the casting. Tonight, I dug that oring out and surprise, it looks exactly like the one I found in between the gear and the casting (although that one is somewhat deformed or oversized). 

I'm going to guess that someone has been in this steering cylinder before and installed or left the old one in and installed a &quot;new&quot; one in the wrong location. Just a guess, but it would explain why I have to many orings and one not depicted where I thought.