allis chalmers wc

Never heard of a traction release on a WC, unless your talking about the clutch. WD-WD45's had a traction boost that was used on mounted equipment that would start picking up on the mounted empliment when the wheels started slipping and would put the extra weight on the back tires. That was set with the hydraulic lever and you would look at the traction boost gauge.
 
May be talking about the lever straight down from the steering wheel. I can't remember the Allis name for it. It could be used to stop forward wheel motion by touching the clutch briefly while pushing down on the lever.
 
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That lever is in the same place as the step up and step down unit.

This lever was to discinect the rear wheels so you could let the clutch out and the power lift would then raise the cultivator.

Farmers--including my neighbor used to cultivate up to the fence to close then the only way to raise the cultivator with the power lift was to jack up one wheel so it would spin, thus raising the cultivator.

This unit simply did the disconecting to the rear wheels. They made a aftermarket step down, or it could have been from AC. My one neighbor had one that was a step up, a nuterel, and a step down. I have never seen another one in the last fifty years, and I have looked hard. Many old timers told me there was no such a thing, but I drove this one many hrs as a child.
 
Prior to the traction release lever, the mechanical power lift had notches around the outside casting, and a handle was available to operate it manually, when stuck in the mud, or if it was tripped while up against a building or fence. With the addition of the release lever system, one could pop that lever down, and with the transmission in gear, could operate the power lift. Dad also used it with the rotobaler, since it made for faster operation than taking the shift out of gear and restarting after dumping the bale.
 
I have a wartime WC with that setup- it is a Sherman transmission. Bought the whole tractor, 3 new tires, for $525. Saw a Sherman box sell at auction for about $250, thought the usual price was about $600.
 

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