Wow! All these different PTO splines/sizes!??

[jimgerken]

Can anyone point me to a reference like a manufacturers page or something that shows the different PTO shaft spline configurations? I have a mid PTO on a JD that has 15 splines and is 1" OD. I know the standard PTO is 6 splines @ 1 3/8". It would be nice to know what I'm asking for as I start to shop for a new shaft for my homebuilt snowblower. Thanks...

 

[Hydraman]

On your JD the mid PTO is probably 1000RPM . The 6 spline 1 3/8 is for a 540 RPM PTO. So now you know!
The mid PTO on my 3020 is a 1 3/8 and I think 13 spline- it is 1000 RPM only. The rear PTO is set up for both--all ya gotta do is switch shafts. Hope this helps! Good luck!!

 

[Anonymous Poster]

Before standardization got the PTO shafts all the same it was sort of "manufacturer's choice". The early 8N Ferds and also the Ferguson tractors had a smaller shaft. My late forties Case VAI had an adapter on it to go to a smaller size from standard so evidentally the previous owner had a non-standard implement from another manufacturer to power up. I THINK John Deere has always had the standard size spline for 540 RPM, clear back to the inception of the PTO shaft in the two-cylinder models. The belly PTO was a different story, and I don't know what they ended up to be and even if they are some kind of standard size. Early Allis-Chalmers tractors had the pto under the belly with a shaft to the rear. So many variations!!!! Dave