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Allis Chalmers Discussion Forum
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unknown lever

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mark smith

03-09-2005 16:31:35




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Just purchased a fence row styled WC. After bringing it home I noticed a lever on the drive shft housing in between the trans and the rear end. Can anyone tell me what this is for ?




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JMS?MN

03-10-2005 19:21:50




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 Re: unknown lever in reply to mark smith, 03-09-2005 16:31:35  
It is not anything like an independent pto, a 'dog clutch' (?) or anything to do with a worm gear. It is simply a splined sleeve that connects/disconnects splined shafts that transmit power from the transmission to the differential on a WC. It allowed the operator to raise or lower the power lift cultivator, and as described, to quickly stop rear wheel motion while using pto machines like the combine or baler. To restart wheel motion, it was necessary to bring the pto machine to a complete stop with the foot clutch before lifting the lever. The worm gear mentioned is what transmitted transmission power to the power lift assembly- same as on a WC (or RC), irregardless if it had the throwout lever.

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T. Westerfield(W. Ky)

03-10-2005 06:51:54




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 Re: unknown lever in reply to mark smith, 03-09-2005 16:31:35  
The lever was the earliest form of "independent pto". When you quickly pressed the foot clutch and pulled the lever toward you then released the foot clutch, you halted the forward motion of the tractor and left the pto running. I spent many hours on an old WC pulling an AC combine. When the header on the combine began to load up, you went through the shifting process. You had to do it quickly so you wouldn't loose any pto momentum.

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Bill(Wis)

03-09-2005 20:27:54




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 Re: unknown lever in reply to mark smith, 03-09-2005 16:31:35  
The WC only had the foot clutch that stopped everything behind the engine. The hand clutch addition came out on the WD in 1948. So, it sounds like you have the interim dog-clutch deal that AC put on some of the late model WCs to, yes, allow the cultivator to be raised, but more for the requirement of the infamous AC roto-baler where ground travel had to stop when the bale was about to be ejected but the balers belts had to keep turning. No problem if the baler had an aux-engine but most wern't purchased that way. Dog clutch allowed tractor to stop while the pto kept spinning. Then, after the bale had been ejected, the foot clutch had to be depressed to re-engage the dog clutch. It was an interim, stop-gap, afterthought as was the case with so many AC developments but it worked until the WD came along with that second hand clutch which allowed for live hyd and pto.

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Gatz

03-09-2005 19:13:04




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 Re: unknown lever in reply to mark smith, 03-09-2005 16:31:35  
It's the throw-out lever to allow raising the cultivator without moving.
Evidently yours doesn't have it; but there's a large mechanism with a worm gear that mates with the worm inside (under the small cover just ahead of lever) Don't have a pic but someone should.

Gatz



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wolfmantractor

03-09-2005 17:58:19




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 Re: unknown lever in reply to mark smith, 03-09-2005 16:31:35  
Could it be a partially disconnected PTO lever? Does it swing around into a groove on the foot clutch petal arm? If so, it is there to lock clutch in disengaged position so you can hand crank the old girl safely.



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BushogPapa

03-09-2005 17:05:37




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 Re: unknown lever in reply to mark smith, 03-09-2005 16:31:35  
Is it like the one on every WD and WD-45..on the driver's left...just in front of the foot clutch..???

It was there, so you could lock the foot clutch out, to stop the belt pulley, when using a flat belt....without getting on the tractor... The Hand clutch doesent stop the pulley..only the foot clutch...



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John (C-IL)

03-09-2005 16:59:38




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 Re: unknown lever in reply to mark smith, 03-09-2005 16:31:35  
Couple of possibilities. First is the lever that puts the differential in neutral so the cultivator can be lifted while the tractor is stopped. 2nd possiblity is a Sherman 2 speed lever. 3rd possibility is some sort of hand clutch, I've seen a few, but they are pretty obvious what the function is.

A picture is worth a thousand word, serial number may give some clues also. Beyond those suggestions, it must be rare, list it on ebay and see what it is worth LOL. I AM JOKING!

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