What is the original Ford 2N PTO called?

lastcowboy32 · Jul 8, 2018

I need to replace the PTO extender on my Ford 2N.

I went and got a 540RPM PTO extender. Had the same size roll pin in the same position and everything.

Brought it home and put it on my 2N... it doesn't fit.

So, the original PTO stub on my 2N (and I"m assuming all 2N's) is some oddball size?

Is there some industry standard name or nomenclature for it; so I know what kind of extender/adapter I need?

Bob · Jul 8, 2018

The OEM PYO's were 1-1/8" 6-spline vs. the now-standard 1-3/8" 6-spline.

There's extenders available in the 1-1/8" X 1-3/8" sizes, less desirable is to use a (thin/fragile) adapter bushing and a 1-3/8" X 1-3/8" extender.

lastcowboy32 · Jul 8, 2018

(quoted from post at 13:53:56 07/08/18) The OEM PYO's were 1-1/8" 6-spline vs. the now-standard 1-3/8" 6-spline.

There's extenders available in the 1-1/8" X 1-3/8" sizes, less desirable is to use a (thin/fragile) adapter bushing and a 1-3/8" X 1-3/8" extender.

Thank you.

lastcowboy32 · Jul 8, 2018

I think that the adapter bushing setup is what my tractor had. Mine failed; while driving a brush hog. It failed in two layers, like an onion.

Fortunately, the brush hog thing was a one time event. I don't need to use that tractor with a brush hog anymore. I have other tractors to do that now... but I need to fix this to use the 2N with my tedder.

Royse · Jul 8, 2018

The price has gone up a bit but for [b:074b8a8924]~$100[/b:074b8a8924] you can swap it to the standard 1-3/8 and get new bearings and seals.

Bob Harvey · Jul 8, 2018

They were originally called 'Fred'. That changed over the years to 'Roger', Ernie' and Seth'. HTH

Royse · Jul 8, 2018

"They were originally called 'Fred'. That changed over the years to 'Roger', Ernie' and Seth'. HTH"

And now you know, "The rest of the story".

Tim PloughNman Daley RIP · Jul 9, 2018

There are only two sizes of the PTO shaft and was never any "oddball" size ever made. The original PTO shaft is 1-1/8" 6- spline type. Agricultural Engineers later revamped the size to 1-3/8" 6-Spline. All PTO driven equipment now is the 1-3/8" type. There are sleeve adaptors available, what I think you are referring to -see LINK below, that has the 1-1/8" female end and the 1-3/8" male end. It slips over the tractor PTO shaft and gets pinned with a shear roll pin. It's possible you already have the 1-3/8" PTO shaft on your tractor if it has been replaced. They only make and sell the 1-3/8" shafts nowadays. If so, you don't need any adaptor. Now, there is a device called an ORC (Over Running Coupler) which should be used with any brush hog and/or mower.

Tim Daley(MI)
PTO SHAFT ADAPTOR

lastcowboy32 · Jul 9, 2018

Mine is definitely 1-1/8", and the tractor only has a stub that's way too short for any modern implement...nevermind the fact that it's only 1-1/8"

I understand the overrunning coupler thing... I only needed to run the brush hog once, for a couple of hours... I thought I could get away without it. I did...except I blew out the 1-1/8" to 1-3/8" adapter that was on the tractor.

Until this happened, I just assumed that my 2N had a regular (I mean 1-3/8" that modern equipment takes) PTO output. I never even realized that it had some adapter on it.

I guess I call it "oddball" because I didn't even know there was a different (than the 1-3/8" that I'm used to) size every used on these on N's.

I never measured the diameter. I was at a dealer buying some 2060 chain for my baler (another story) and just picked up a 540RPM PTO extender... I figured that's all I needed... never knew that they came in two sizes over the years.

Bob Harvey · Jul 9, 2018

Thanks for the reference to Paul. ;^)

Tim PloughNman Daley RIP · Jul 10, 2018

This is the correct sleeve to adapt your 1-1/8" OEM PTO shaft to accept the 1-3/8" Industry Standard size. If your mower won't attach, the PTO drive shaft for Category I implements/mower isn't right.

Tim Daley(MI)
PTO ADAPTER

tractorguy2 · Jul 10, 2018

There are two different lengths of PTO adapters. The short ones
are about three inches long. They are light duty and don't hold
up well. The long adapter like the one Tim posted it much
heavier duty than the short one.

Originally all tractors including John Deere used the 1 1/8
shaft. I have a 1941 Case with 1 1/8 shaft. Two weeks ago I saw
a 1940 Farmall H at an auction that had the small shaft.

I think the switch to the larger shaft was around 1942. Ford was
one of the last manufacturer to make the switch to the large
shaft.

What is the original Ford 2N PTO called?

lastcowboy32

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Bob

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Royse

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Tim PloughNman Daley RIP

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