Overrunning Clutch compatibility

kevin58

New User
I found a quick disconnect overrunning clutch coupler on Amazon.com that is 1-1/8" - 6 female to 1-3/9" - 6 male but it is titled as a "replacement for Allis Chalmers part number 51A110".

As long as the shafts are the same as I need shouldn't it work?

Thank you.

PS. thanks for letting me be part of the forum. I just bought my first tractor just two weeks ago and this is my first question for the group.
 
(quoted from post at 13:54:58 03/07/17) I found a quick disconnect overrunning clutch coupler on Amazon.com that is 1-1/8" - 6 female to 1-3/9" - 6 male but it is titled as a "replacement for Allis Chalmers part number 51A110".

As long as the shafts are the same as I need shouldn't it work?

Thank you.

PS. thanks for letting me be part of the forum. I just bought my first tractor just two weeks ago and this is my first question for the group.

Is that a typo above "to 1-3/9" - 6 male "? I would think that as long as it's 1 3/8"-6 male it would work. There are plenty of ORC's for sale. If you are leery of this one, look on Ebay.

You want to be sure that the male shaft on the ORC has a quick connect groove in it.
 
(quoted from post at 17:19:28 03/07/17)
(quoted from post at 13:54:58 03/07/17) I found a quick disconnect overrunning clutch coupler on Amazon.com that is 1-1/8" - 6 female to 1-3/9" - 6 male but it is titled as a "replacement for Allis Chalmers part number 51A110".

As long as the shafts are the same as I need shouldn't it work?

Thank you.

PS. thanks for letting me be part of the forum. I just bought my first tractor just two weeks ago and this is my first question for the group.

Is that a typo above "to 1-3/9" - 6 male "? I would think that as long as it's 1 3/8"-6 male it would work. There are plenty of ORC's for sale. If you are leery of this one, look on Ebay.

You want to be sure that the male shaft on the ORC has a quick connect groove in it.
nd that his PTO shaft has that groove!
 
(quoted from post at 14:47:21 03/07/17)
(quoted from post at 17:19:28 03/07/17)
(quoted from post at 13:54:58 03/07/17) I found a quick disconnect overrunning clutch coupler on Amazon.com that is 1-1/8" - 6 female to 1-3/9" - 6 male but it is titled as a "replacement for Allis Chalmers part number 51A110".

As long as the shafts are the same as I need shouldn't it work?

Thank you.

PS. thanks for letting me be part of the forum. I just bought my first tractor just two weeks ago and this is my first question for the group.

Is that a typo above "to 1-3/9" - 6 male "? I would think that as long as it's 1 3/8"-6 male it would work. There are plenty of ORC's for sale. If you are leery of this one, look on Ebay.

You want to be sure that the male shaft on the ORC has a quick connect groove in it.
nd that his PTO shaft has that groove!

As I understand it, none of the 1 1/8" "N" PTO's had a quick connect groove in the shaft. Mine didn't. That' why I changed my shaft to a 1 3/8".
 
(quoted from post at 15:52:29 03/07/17)
(quoted from post at 14:47:21 03/07/17)
(quoted from post at 17:19:28 03/07/17)
(quoted from post at 13:54:58 03/07/17) I found a quick disconnect overrunning clutch coupler on Amazon.com that is 1-1/8" - 6 female to 1-3/9" - 6 male but it is titled as a "replacement for Allis Chalmers part number 51A110".

As long as the shafts are the same as I need shouldn't it work?

Thank you.

PS. thanks for letting me be part of the forum. I just bought my first tractor just two weeks ago and this is my first question for the group.

Is that a typo above "to 1-3/9" - 6 male "? I would think that as long as it's 1 3/8"-6 male it would work. There are plenty of ORC's for sale. If you are leery of this one, look on Ebay.

You want to be sure that the male shaft on the ORC has a quick connect groove in it.
nd that his PTO shaft has that groove!

As I understand it, none of the 1 1/8" "N" PTO's had a quick connect groove in the shaft. Mine didn't. That' why I changed my shaft to a 1 3/8".

Both of mine have the groove in the 1 2/8" pto shafts.
 
Kevin.........9N's, 2N's and early 8N's had 1-1/8 PTO's and weird 4-nipple dizzy. Later 8N's (1950?) had modern 1-3/8 PTO's and normal 5-nipple dizzy. Most N-tractors are used fer brush-hoggin' weeds and lite trees. Modern brush-hogs use 1-3/8 ORC (over running coupler) Needed to disconnect the PTO so the inertia of them BIG swinging BLADES don't drive you into the corner of the barn, fence post, over the creek bank when you clomp yer #12 brogans on the clutch pedal to slow down. ........HTH, Dell, yer ORC safety preacher
 
Just a minor correction, all 9/2/8N's originally had 1-1/8" PTO shafts. In fact Ford tractors had 1-1/8" into the last half of the 1950's. Strongly agree that the ORC is needed when running a brush hog on a Ford N tractor.
 
(quoted from post at 13:54:58 03/07/17) I found a quick disconnect overrunning clutch coupler on Amazon.com that is 1-1/8" - 6 female to 1-3/9" - 6 male but it is titled as a "replacement for Allis Chalmers part number 51A110".

As long as the shafts are the same as I need shouldn't it work?

Thank you.

PS. thanks for letting me be part of the forum. I just bought my first tractor just two weeks ago and this is my first question for the group.

Now that I read this again, you said quick disconnect ORC. You said it is 1 1/8" female. That would mean you have a 1 1/8" pto shaft on your tractor. And you want the orc's output shaft to be 1 3/8".

I spent years searching for a quick disconnect shaft that would fit a 1 1/8" shaft tractor pto. I thought I found one one time but on calling and speaking to the advertiser, they were mistaken, it was for a 1 3/8" shaft PTO.

Truth is, they don't make a quick disconnect PTO for the 1 1/8" PTO shaft simply because the 1 1/8" PTO shafts had no groove in them to accept a quick disconnect.

I finally changed out my PTO shaft to a 1 3/8" shaft and got the quick connect ORC you see in the picture below. You see it has the push pin with the spring on it to hold it onto the tractors pto.

DSC03780_zps2hj5uejp.jpg
 
To an earlier question... yes, I meant to type 1-3/8.



Here is the item listing at amazon.com:

https://www.amazon.com/Products-Overrunning-Coupler-Replacement-Chalmers/dp/B00BW686N4/ref=sr_1_2?ie=UTF8&qid=1489086915&sr=8-2&keywords=QD+PTO+overrunning+coupler

Here is the description at the bottom of the page:

Product Description

New splined quick disconnect overrunning coupler. Coupler female I.D. is 1.125" 6 spline. The male O.D. is 1.375" and 6 splines. The coupler is rated at 75 max horsepower.

I'm thinking this should work.
 
Yes, if their description is accurate & not just a cut and paste job from a non-quick disconnect that they sell. NOW, the important thing is, do you have a groove around the circumference of the PTO shaft on your tractor? If not there is no way to keep the coupler attached. Look at coupler output and grove in picture Caryc posted. Your PTO shaft needs that same groove.
 

OK, here is some more info. I found the following link. I had kept it on my desktop for this reason. If you check the ad, it says it's for a 1 1/8" tractor PTO. Years ago I called Agri Supply about that ORC to verify that it was for a 1 1/8" PTO.

After talking to the guy for a while, he finally said that it was a mistake and that the female quick connect was actually 1 3/8". I kept that shortcut on my desktop to see if they ever changed the ad. I had forgotten all about it until now. So, I just called Agri Supply and talked to a guy. He said it was for a 1 1/8" PTO shaft. To tell you the truth, I don't think this guy really knew what he was talking about. Their ad still reads the same.

http://www.agrisupply.com/over-run-clutch-spline-to-spline/p/32439/

As I previously said, the 1 1/8" PTO tractor shafts do not have a groove in them to accept the quick connect pin.

Do what you want with this information. Believe it or not. But if you do buy the thing, please come back and tell us if it actually fits your tractors 1 1/8" PTO shaft.
 

Came back to add this.

Do a search on Ebay for "orc for pto shaft"

You will see plenty of them on there. The only 1 1/8" female to 1 3/8" male ones are not quick disconnect. What could the reason be?

Could it be that the 1 1/8" pto shafts did not have a quick disconnect groove?

I hope you do take a chance and buy the thing. I'd like to get this settled. But, if you do buy it, make sure you can return it first.
 
Oh, I believe that they exist (different number/different prices), but as you & others have warned, if no groove, they won't work on his tractor.



Overrunning Clutches Models
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DNE-1516113
Over-Running Clutch 1 1/8-6 To 1 3/8-6 With push Pin
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DNE-1516127
Over-Running Clutch 1 3/8-6 To 1 3/8-6 With push Pin
$132.10
 
Just a quick update... the QD overrunning coupler in question will fit. Or I should say it [i:26029f1a5b]would[/i:26029f1a5b] fit if my tractors PTO shaft had the groove for the QD pin. Mine doesn't so I will have to use the roll pin style coupler.

Thank you for the input and helping me sort this out. This kind of thing probably is second nature to most of you but I have only owned this tractor a few weeks and I'm learning something new every day.
 
(quoted from post at 12:53:26 03/13/17) Just a quick update... the QD overrunning coupler in question will fit. Or I should say it [i:5e6f04bbe2]would[/i:5e6f04bbe2] fit if my tractors PTO shaft had the groove for the QD pin. Mine doesn't so I will have to use the roll pin style coupler.

Thank you for the input and helping me sort this out. This kind of thing probably is second nature to most of you but I have only owned this tractor a few weeks and I'm learning something new every day.

So the female end of the ORC actually was 1 1/8" ?
 
(quoted from post at 13:09:59 03/13/17)
(quoted from post at 12:53:26 03/13/17) Just a quick update... the QD overrunning coupler in question will fit. Or I should say it [i:b2096a3830]would[/i:b2096a3830] fit if my tractors PTO shaft had the groove for the QD pin. Mine doesn't so I will have to use the roll pin style coupler.

Thank you for the input and helping me sort this out. This kind of thing probably is second nature to most of you but I have only owned this tractor a few weeks and I'm learning something new every day.

So the female end of the ORC actually was 1 1/8" ?

Yes.
 

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