OK, yep, I see it now.
This truck has more Bells and Whistles than any '50s era front-mount American I've ever seen!
You've probably already figured this out, but the "Three-way Valve" relates to use of the governor, and where the water it uses drains (or not). Has something to do with the accuracy of the governor.
You probably also know this as well, but the piping to the front of the Barton pump is so (warm) coolant will circulate through a water jacket on the front of the pump, thereby preventing it from freezing in cold climates. Also provides additional cooling (for the coolant) in summer. Pretty cool. Guessing your truck came from a colder climate?
I've got a PDF version of a Barton Manual I can e-mail you: send me a Private Message with your e-mail adress (or just send me an e-mail to
[email protected]).
-Michael
