SMTA PTO

Bud W · Jan 1, 2011

My question concerns the lever on the right rear of the SMTA. Is it only used to engage the PTO ( its the only device I see to engage the PTO but it sure seems overkill if thats the only thing it does ) or can it be used as a hand clutch like on an Allis WD? I'm waiting on delivery of my Operators Manual. Thanks

Nebraska Kirk · Jan 1, 2011

Yes, that lever is ONLY for engaging and disengaging the PTO.

CNKS · Jan 1, 2011

You have a PTO with two bands, one engages the PTO, one applies the brake. The lever is long because the bands are rather difficult to engage.

Bud W · Jan 1, 2011

Wow they must have had a warehouse full of surplus levers from Prairie Tractors to use up. Why in the world would they use such a heavy lever when something like the little rod on my SC ,SA and Cubs would do the same thing???

Wardner · Jan 1, 2011

If you don't like the lever, lose it. It can be air shifted like a truck. This one is on a W-400 and can be shifted from two locations.

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RAW in · Jan 1, 2011

Like said above, the lever has to engage bands to run the pt or brake it. The older tractors just had a gear or cdollar to slide on a shaft, so the small levfer was all that was needed.

IH fan · Jan 1, 2011

(quoted from post at 20:53:16 01/01/11) Wow they must have had a warehouse full of surplus levers from Prairie Tractors to use up. Why in the world would they use such a heavy lever when something like the little rod on my SC ,SA and Cubs would do the same thing???

Remember, on the smaller tractors you mention, the foot clutch [u:cb1599fded]is the clutch[/u:cb1599fded]... the lever is just engaging the gears with the foot clutch pushed in. On the SMTA, IT IS the clutch for the IPTO.

Bud W · Jan 2, 2011

So are you saying you do not have to stop the tractor with the foot clutch in order to engage or disengage the PTO? You just push the lever one way or the other?
Thanks

IH fan · Jan 2, 2011

(quoted from post at 10:05:15 01/02/11) So are you saying you do not have to stop the tractor with the foot clutch in order to engage or disengage the PTO? You just push the lever one way or the other?
Thanks

That's what I'm saying. I don't know that ALL SMTAs had independent PTO, but it was first available on that model.

Janicholson · Jan 2, 2011

The answers below are correct. It is the difference between shifting a transmission into or out of gear, (easy) or pushing down the clutch pedal or brake pedal.
The engine makes ~50 to 60hp. The lever is applying the force needed to transfer this power, and also to effectively stop the rotation of bush hog or baler flywheel inertia. 30 to 40 pounds of force can be expected to be applied to the lever handle to latch it either on, or off. Jim

IH fan · Jan 2, 2011

John Deere did not have the long lever at the time for their 50/60/70 series, but they had leverage built into the linkage to do the same thing. The IH tractors did not use any built in external leverage, so it took a long lever.

SMTA PTO

Bud W

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Nebraska Kirk

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CNKS

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Bud W

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Wardner

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RAW in

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IH fan

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Bud W

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IH fan

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Janicholson

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IH fan

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