Bob - thank you very much. You are dead-on. I had no idea Ford ever made such a thing. I have had several N series, an NAA, and this have a 641 and a 4000. I had no idea such a thing as this existed. That is why I posted here, hoping someone had heard of the problem I described before tearing into everything. I stated earlier it acted like a sluggish torque-converter in cold weather. That made little sense for an all gear-drive tractor. I have to ask, what on earth was Ford thinking putting that clutch in the main drive input?
I am no Ford expert. I spent much of my adult life working on Deere machines. That said, I have been around quite a few Fords. This "live-continuous" PTO seems to have been a very short-lived idea.
For all I know the tractor will be fine as is. I will have to work it some and find out. After it is parked and I start it cold, it takes 5-10 minutes before it will move. Once it does though, it seems to work fine. Kind of like my Case 580CK was in cold weather.
I did not have a manual earlier. I have a 600 series manual which I hoped would be close. It is for some things but not this odd-ball continuous/live PTO.
I had an Allis Chalmers ED-40 with a similar problem years back. It had two dry clutches. A foot clutch and a hand-clutch to provide the same sort of PTO operation as it seems Ford intended for this NAA-Jubilee.
Thanks again. This was a real brain-killer (at least for my brain). Call it "confirmation bias." I had NO idea such a thing ever existed so I did not look for it. In fact, that tiny little PTO pump? I did not know it was a pump. I thought it was just some overdone proof-meter gear-box for the cable-drive.
So I guess this tractor is kind of a rarity. I will try to save it as is. If not, and no parts are available - I assume I can just stick a long splined coupler in there and convert it to a "normal" NAA? From what I see, it looks that way.
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