PTO yoke

[farmdave]

I lost the driveshaft, including both yokes, for my 1948 Farmall H that hooks up to a bushhog. I have a local place that can build me a new driveshaft, but they do not have the yoke that hooks onto the Farmall H PTO which only has six splines. Does anyone know where I can find a yoke for the Farmall H PTO? Any help would be appreciated.
Thanks.

 

[used red MN]

What type of drive shafts does this place normally build, auto and truck? The PTO on your tractor is about as common as they come it is a 540 rpm PTO. In ag applications there is also a 1000 rpm 1 3/8” 21 spline and also the newer 1 3/4” 20 spline 1000 shaft. The only chance it could be different is if some put an early smaller 39/40 PTO on your tractor. Do you have any farm supplies stores around? Tractor Supply, Fleet Farm, Rural King, Runnings check there they probably have a replacement shaft ready to go. You will need to know the diameter of your shaft on the mower and the length you need.
Edited to be more clear towards the Farmall H per reply 4.

 

[caterpillar guy]

When did an H ever have a 1000 PTO shaft in it. I've never ever seen one. Must be a new model H. The 1000 would not be around on any letter series tractors I know of and I don't recall seeing one any most of the older number series older than the 60 series . I'm going to stick my neck out and say the 06 was the first models to have a 1000 available on it. In the little tractors probably not till after the run of the 240,340,and those models . Maybe in the 544,454,and up models.I know our 574 and 674 both have the double shafts in them. 540 and 1000.

 

[used red MN]

When did an H ever have a 1000 PTO shaft in it.

Sorry, I should have been clear that I was talking about farm tractor/equipment applications in general that was written poorly. Point being any shop that built any amount of PTOs for ag stuff should probably have an inventory of a 1/3 540 yokes and 2/3 of the 1000s. I know there is a large size 1000 as well with over 200 - 300hp being very common in modern farm tractors.

 

[560Dennis]

YT has them for Farmall H drive line
here’s the link

Farmall H Parts - PTO / Driveline Parts

International Harvester / IH Farmall H PTO / Driveline Parts for sale. Same-day shipping and easy returns. Compare our prices!

www.yesterdaystractors.com

this what you want ?

 

[Fritz Maurer]

When did an H ever have a 1000 PTO shaft in it. I've never ever seen one. Must be a new model H. The 1000 would not be around on any letter series tractors I know of and I don't recall seeing one any most of the older number series older than the 60 series . I'm going to stick my neck out and say the 06 was the first models to have a 1000 available on it. In the little tractors probably not till after the run of the 240,340,and those models . Maybe in the 544,454,and up models.I know our 574 and 674 both have the double shafts in them. 540 and 1000.

Who said anything about an H with 1000 PTO? I read, “in ag applications” into which the 1000rpm PTO sits squarely.

why get sarcastic with the guy for trying to help someone. The information he gave was accurate.

I think it’s safe to say none of us has ever seen an H powering a Brent 472 grain cart.

 

[used red MN]

Who said anything about an H with 1000 PTO? I read, “in ag applications” into which the 1000rpm PTO sits squarely.

why get sarcastic with the guy for trying to help someone. The information he gave was accurate.

I think it’s safe to say none of us has ever seen an H powering a Brent 472 grain cart.

Fritz, I edited that to be more clear. Originally, it did seem like I was suggesting an H could have a 1000 rpm shaft. Even though some on here don’t think I am very grounded with knowledge, I could hardly think someone who posts on here much and reads my replies would believe I would say an H could have a 1000 rpm PTO. He took it and ran with it, everybody has their days.

 

[farmdave]

An update...I was able to find the yoke on Ebay (1 1/8" 6 splines). By the way, Yesterday's Tractors has complete drivelines, but they do not have any yokes listed. Tractor Supply has them, but not in the size I needed. Thanks to everyone for their replies, I didn't realize I knew so little about PTO driveshafts so at least now I'm more educated...and the yokes on me

 

[DoubleO7]

An update...I was able to find the yoke on Ebay (1 1/8" 6 splines). By the way, Yesterday's Tractors has complete drivelines, but they do not have any yokes listed. Tractor Supply has them, but not in the size I needed. Thanks to everyone for their replies, I didn't realize I knew so little about PTO driveshafts so at least now I'm more educated...and the yokes on me

Your update is appreciated!
So many new members join the forum to ask a question about a dilemma.
They then read the replies and we never get a thank you nor an update.
And they are never seen again.
Thanks for letting us know.

 

[BarnyardEngineering]

If you don't mind me asking, what kind of place makes PTO shafts but doesn't have the common-as-the-air-we-breathe, industry-standard 1-3/8" 6-spline 540RPM PTO yoke?

 

[DeltaRed]

The H could have either 1 1/8"(early) or 1 3/8"(late) PTO. Find out(measure) which you have, As said,the six spline pto is as common as it gets. Im surprised your PTO shop doesnt know that.They can easily order the correct one.Any implement dealer will have them on the shelf.

 

[DoubleO7]

If you don't mind me asking, what kind of place makes PTO shafts but doesn't have the common-as-the-air-we-breathe, industry-standard 1-3/8" 6-spline 540RPM PTO yoke?

Maybe the shop he contacted is a driveshaft builder that can make a pto shaft.
A shop that makes driveshafts 99.99% of the time and others like PTO shafts 0.01% of the time.

 

[BarnyardEngineering]

Maybe the shop he contacted is a driveshaft builder that can make a pto shaft.
A shop that makes driveshafts 99.99% of the time and others like PTO shafts 0.01% of the time.

If that's the case he wouldn't have the other end either...

 

[farmdave]

Here's a final update providing even more evidence that I don't know much about PTO drivelines. To begin with, I took a tape measure to the PTO shaft on my 1948 Farmall H and the closest measurement from spline to spline was 1 1/4". The shaft on my very old brush hog (not a Bush Hog brand so don't know what else to call it) has 21 splines and measures 1 3/8". These are the measurements I provided to the shop that makes the PTO drivelines. I have now found out (thanks to some great people on this forum) that there are only two diameter sizes for the Farmall H...1 1/8" and 1 3/8" so it's no wonder the guy who primarily makes drive shafts for autos could not find the right yoke. Since my tractor shaft didn't seem to meet either of these sizes according to my tape measure I assumed it was a 1 1/8" shaft so I ordered one on Ebay. Of course I was wrong since the one I received was too small. Obviously, it must be the 1 3/8" version which makes sense because my tractor is not an earlier version. Then today I happened to stumble on a listing for a complete driveline at Amazon of all places that was within the telescoping length I required and both ends featured the yokes with six splines of 1 3/8". I also found an adapter for the brush hog shaft which takes the 21 splines down to 6 so it will be compatible with the driveline on Amazon. The price for the complete driveline was $149 and the adapter was $49 so I ordered them since that looks to be a lot less than having a shop make one for me.. I'm hoping this will finally fix my problem. I vow never to lose another driveline. Please don't ask how I lost the first one.

 

[Farmalldude45]

Here's a final update providing even more evidence that I don't know much about PTO drivelines. To begin with, I took a tape measure to the PTO shaft on my 1948 Farmall H and the closest measurement from spline to spline was 1 1/4". The shaft on my very old brush hog (not a Bush Hog brand so don't know what else to call it) has 21 splines and measures 1 3/8". These are the measurements I provided to the shop that makes the PTO drivelines. I have now found out (thanks to some great people on this forum) that there are only two diameter sizes for the Farmall H...1 1/8" and 1 3/8" so it's no wonder the guy who primarily makes drive shafts for autos could not find the right yoke. Since my tractor shaft didn't seem to meet either of these sizes according to my tape measure I assumed it was a 1 1/8" shaft so I ordered one on Ebay. Of course I was wrong since the one I received was too small. Obviously, it must be the 1 3/8" version which makes sense because my tractor is not an earlier version. Then today I happened to stumble on a listing for a complete driveline at Amazon of all places that was within the telescoping length I required and both ends featured the yokes with six splines of 1 3/8". I also found an adapter for the brush hog shaft which takes the 21 splines down to 6 so it will be compatible with the driveline on Amazon. The price for the complete driveline was $149 and the adapter was $49 so I ordered them since that looks to be a lot less than having a shop make one for me.. I'm hoping this will finally fix my problem. I vow never to lose another driveline. Please don't ask how I lost the first one.

21 spline pto yokes usually signify a 1000 rpm pto rather than a 540 rpm pto. Since this doesnt seem consistent with an old bush hog, I think you may need to proceed carefully. Your H is not equipped with a 1000 rpm pto, so if you really do have a bush hog designed for 1000 rpm, it will not perform satisfactorily at 540 rpm. Good luck.

 

[rustred]

Here's a final update providing even more evidence that I don't know much about PTO drivelines. To begin with, I took a tape measure to the PTO shaft on my 1948 Farmall H and the closest measurement from spline to spline was 1 1/4". The shaft on my very old brush hog (not a Bush Hog brand so don't know what else to call it) has 21 splines and measures 1 3/8". These are the measurements I provided to the shop that makes the PTO drivelines. I have now found out (thanks to some great people on this forum) that there are only two diameter sizes for the Farmall H...1 1/8" and 1 3/8" so it's no wonder the guy who primarily makes drive shafts for autos could not find the right yoke. Since my tractor shaft didn't seem to meet either of these sizes according to my tape measure I assumed it was a 1 1/8" shaft so I ordered one on Ebay. Of course I was wrong since the one I received was too small. Obviously, it must be the 1 3/8" version which makes sense because my tractor is not an earlier version. Then today I happened to stumble on a listing for a complete driveline at Amazon of all places that was within the telescoping length I required and both ends featured the yokes with six splines of 1 3/8". I also found an adapter for the brush hog shaft which takes the 21 splines down to 6 so it will be compatible with the driveline on Amazon. The price for the complete driveline was $149 and the adapter was $49 so I ordered them since that looks to be a lot less than having a shop make one for me.. I'm hoping this will finally fix my problem. I vow never to lose another driveline. Please don't ask how I lost the first one.

Well after the first couple years of production these pto’s are 1 3/8 “. The same as all 540 rpm pto’s. don’t know how u come up with that measurement. All the tractors have the same pto size don’t matter what make. As for the yoke all u had to do is find an old grain binder or mower and there is your part. Let the machine shop do the rest if your not a welder.

 

[used red MN]

In my opinion you should also run an over-running clutch on the PTO on that H with a gear drive PTO. Here is what goes on, this is copied from another post where the poster had an M and the shifter popped out of position locking it in two gears.
..”I’ll add not sure if you are utilizing one or not, but not running an over-running clutch (ORC) on the PTO when running a bush-hog on a gear drive PTO can aggravate the gearshift problem. When you press the clutch down with the PTO in gear the momentum of the spinning blades keeps driving the tractor forward. You push in the clutch and want to pop it out of gear right away as you normally would. The momentum of the blades drives the tractor forward keeping pressure on the gears through the bottom transmission shaft. So the pressure against the gears makes them shift harder and with a worn shifter increases the possibility that it slips out of place. Also the ORC is a safety item that keeps you from being driven into something in tight quarters.”..
Also in my opinion you should have came here and checked before you ordered the shaft an adapter. The 1 3/8” 6 spline yoke for 540 should not be that difficult to find, on a shaft that is correct for your application.
The trouble is when you add an ORC you move the PTO mount point back 6”. Then in your case you will have that 540 to 1000 (21 spline) adapter behind that. Having the universal joint that far back from the point it is supposed to mount is not ideal. With just the ORC on there one can usually “get by” but in your case your adding more “dope to the rub”

 

[caterpillar guy]

Agri supply will have a complete drive shaft like he is looking for for probably similar money to the cobbled up mess he will have with the added ORC in the mix. And yes the 540 yoke is about the most common one out there for a few more years till the 1000 takes over in the bigger tractors.

 

[farmdave]

21 spline pto yokes usually signify a 1000 rpm pto rather than a 540 rpm pto. Since this doesnt seem consistent with an old bush hog, I think you may need to proceed carefully. Your H is not equipped with a 1000 rpm pto, so if you really do have a bush hog designed for 1000 rpm, it will not perform satisfactorily at 540 rpm. Good luck.

I was using the mentioned bush hog with my previous tractor, an Allis Chalmers D17 as well as the Farmall H I now have and it performed fine.

 

[farmdave]

Thanks everyone for your replies. In answer to "used red" and "caterpillar guy" I understand that using an adapter is not ideal and utilizing an ORC would be preferable, but I apparently have no other options. Agri Supply does not have a complete drive shaft that will fit my situation...I checked with them along with Tractor Supply, Race Brothers, YT, Ebay, Craigslist and others and spent hours online searching for a solution while also asking on this forum. My driveline needs to have a 1 3/8" 6 spline yoke on one end and 1 3/8" 21 spline yoke on the other end and the distance between the tractor PTO shaft and the bush hog shaft is 35" measuring from the back of the shafts. I could not find this configuration on a complete driveline anywhere and I spent many hours searching. As a matter of fact I could not find a 6 spline to 21 spline anywhere no matter what length. "Farmalldude45 may be right...my very old bush hog maybe was designed for a 1000 PTO rather than a 540. However, it worked fine with my previous Allis Chalmers D17 and also with the Farmall H before I lost the driveline.