I bought the current rock shaft housing from Worthington ag, it was removed from a tractor and in a pile of other parts. It did have a hydraulic hose attached to one of the plugs on the left side by the plug that you would use to drain the system from. I removed the remains of the hose and installed a pipe plug. It was after I had no hydraulics to my remotes initially on the &quot;new&quot; installation of the housing that I asked the question and I was clued in about &quot;power beyond&quot; and how it is accomplished. I went looking and sure enough, I did find a plug inside the passageway between the two ports on the left. I removed it by taking the plug that is hidden by the steering priority valve out (left front face) and using a long extension reached in. 

I've attached a picture if I've done it right, of the left side. I took a right side picture but it was of poor quality. Batteries in the camera were about dead and it wouldn't hold the image. You can see my current installation, the tube is in the back ground. I should probably have downsized the image somehow, but then bigger is better unless your on dial-up.

I do have the factory shop manual and a parts book for the tractor in addition to an IT manual. I have no shortage of technical material, I just lack some of the details that one gets from working on this stuff. I'm an aircraft mechanic by trade (but I recently had a short 3 month career working on industrial fork trucks between aviation jobs)

I'll send you my email address again Mr. Schwiebert. I would appreciate the literature. I know the correct valve is no longer available through my AGCO dealer (I checked), but I may be able to rig up a gate valve or something similiar if this is what my tractor is missing. I've not had the chance to see any other series A or B tractors up close to check them out and see how they are plumbed.

Anyway, a topic for discussion later this month at the Lafayette show... maybe I'll have an opportunity to meet either of you there.