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Farmall A and Super A pto's

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David Stubbs

09-14-1999 20:24:15

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Does anyone know if a Farmall A pto(with belt pulley pto) will work on a Farmall Super A?

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Harold H

09-15-1999 05:01:46

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Re: Farmall A and Super A pto's in reply to David Stubbs, 09-14-1999 20:24:15

David,

The Farmall A, Super A, and B pto,s are the same and will interchange. Early models had a 1 1/8" pto shaft which was changed in the late 40's to a 1 3/8" pto shaft, but all will fit.

Harold H

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Curt Cooke

09-15-1999 07:26:24

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Re: Re: Farmall A and Super A pto's in reply to Harold H, 09-15-1999 05:01:46

Hold on Harold, the Supers' spline shaft in the transmission which drives the PTO is different and so is the input shaft of the PTO itself. Remember the straight A's PTO engaged with a 2 lug type feature and the Supers had more of a PTO shaft like connection to the spline shaft.
Curt

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Paul

07-13-2004 05:56:56

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Re: Re: Re: Farmall A and Super A pto's in reply to Curt Cooke, 09-15-1999 07:26:24

Okay, so, thinking I had all the information I needed, I took the PTO assembly (w/belt pulley) from a bone-yard Super A to put on my very early B. I swapped the spline shaft with another guy who wanted the newer one so I have the correct 2-lug type to mate to the B. According to what I read, everything should work. Doesn't. The entire unit SEEMS to mate up but won't close up the last 1/3 inch. I tried to draw it on by putting in a couple of the bolts but all that did was freeze up the unit. It just does not mate and I can't tell where it's hitting. Also, when I put the spline shaft on and attempt to actuate it with the shift lever, the shift lever will not go into place (although, when held up to the tractor, the spline shaft engages the drive). It really seems that the shaft is about � inch too long.

Anyway, the entire B-project is in question. (Although, now that I've started it, I'd like to at least get the mechanics worked out.) The original plan was to mount a 72" Woods. I've mounted the Woods on my Super C while working the PTO issue and find that it's lots of work for the C. That leads me to conclude that the B would be way overworked. In fact, crosses my mind I should move the Woods to an H - and I'm really glad I've not yet installed the WFE I bought for the C. Sure is a different load from the 60" IH mower on the Super A I just sold. The IH mower was much lighter and seems flimsy in retrospect.

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