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Mr. James that's just Allis-Chalmers' version of draft control, but they called it Traction Booster for that's what it does. It transfers weight from a mounted implement. The harder the implement pulled against that snap coupler under the tractor, the more it gave a little and triggered the hydraulic system and the system would lift on the implement enough to gain or borrow some weight from it for traction. Therefore, Allis-Chalmers tractors pulling their own implements were quite competitive even though they came to the field lighter. Where they got in a jam often was on a dead or drawbar pull where they couldn't use their built in system for adding more weight. But that's where the name "Traction Booster" came from and it was highly touted as it should have been. The old Ford and Fergusons had something a little like it but the Allis deal was really quite good. True, you could overdo a good thing and start lifting the plow but if you ran it right the plow would stay the same depth and the tractor was greatly helped. That little lever under the main one does work in conjunction with the same hydraulics to which the bigger top lever is. The Traction Booster lever is, one way of putting it, a fine adjustment on the bigger one and it has notches where it'll stay in a certain setting between the high and low position. The big lever only has a place at the top and bottom to stay. That Torque Amplifier you mentioned that was IH's was more like your hand clutch on the right side which they called a Power Director clutch. It was Allis-Chalmers' high low like the IH "TA", like a Super MTA, which had that. They didn't work exactly the same inside but the end result was the same, a reduction gear on the go under load. On the differential lock, Allis-Chalmers didn't have them. You had to do that yourself with dragging one or other of the brakes if a wheel broke loose. But of course you had to hold all that to a minimum due to wear on the brakes. It was just a "get me out of this jam" deal. Hope this helps, and God Bless. Pon
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