We just aquired an old 1958 AC D-14, and I saw the traction booster gage, but am puzzled as far as what it does, or when it is used?? Anyone know anything about this feature?

The traction booster was Allis Chalmers' method of transferring weight to the rear of tractor when pulling a load such as a plow. It did this by sensing the amount of pull throught the "snap-coupler" which was connected to the hydraulic system. When the load increased, the hydraulic-operated lift arms tended to lift the plow; but because it was in motion, the plow stayed in the ground and instead, the front of the tractor was actually lifted, but only to the point of becoming lighter, hence the weight being "transferred" to the rear. The setting for the amount of boost could cause the front end to leave the ground, so it was this setting that was important to get best results. Too much assist and the front would come off the ground; too little and you'd lose traction. It only worked with those implements specifically designed for it.

Thanx alot for your info