I went to the Aries
website and no mention is made of how to remove those pins.
Your picture looks like the fork end, part 42. The two pins are the Joint Block Pin - Spigot End, part 36, and Joint Block Pin - Plain End, part 37.
The fork end attaches to the connecting rod, part 38.
These pins are used in both the fork end and the connecting rod.
The only reference I found is, "The connecting rod No 38 is removed by pulling out the top and bottom pins No 36 (they should have serrations on their ends)."
"Pulling out the top and bottom pins 36" seems to indicate 'not to' use a hammer and drift and drive the pins through the fork end from the outside but to push them out from inside. Remember the pins should have serrations on their ends.
I haven't a clue on how to tell pin part 36 from pin part 37 and the technical illustration is so small if there is a difference you can't see it. :-)
I have an Aries I inherited with my boat
. It also needs a rebuild
. If You find an solution I sure would appreciate a reply.
If you don't have them already I've included the links for our windvane
on the Aries website:
Aries Standard Vane Gear Technical Illustration
Aries Standard Vane Gear Parts List
Rebuilding hints for the Aries Vane Gear - Standard Model.