I'm use to the Ferguson style 3 point hitch and draft control arrangement type tractors - like my handy dandy MF50 diesel. As the plow encounters a hard pull, it pivots around the hitch points on the lower lift arms, putting pressure on the top link, which presses a control rod (inside a large coil spring to resist the pivoting) and if there is enough force, it momentary/slightly lifts the plow - depending in the draft control setting until you pass the difficult plowing. That's how think I understand it. I suppose via the top link, force is applied to keep the front end on the ground too and when the plow tries to lift, traction is increased too.
Is the traction booster on an Allis Chalmers kind of the same thing - just different wording and no down pressure in the front end?
Would I be correct in assuming that with a WD45 (that's the model on my radar) when the pull gets difficult, i.e. the draft increases, and via whatever mechanism is incorporated in the snap coupler arrangement, the hydraulics begins to lift the plow and with it forces the rear wheels down and increases traction? And because there is no top link, like a Ferguson system, if the pull is really hard and the traction booster tries to lift enough to really mash the rear wheels to the ground increasing traction, but with it the front end can come up a bit?
Or have I got it all wrong?
Help me understand the traction booster and how it operates and how it compares to the Ferguson system.
I gather the two cylinder Deere's and Farmalls had no draft control and therefore would rely on shear weight of the tractor for traction?
This traction booster and snap coupler arrangement sounds like a pretty slickery design.