PTO adapter

[Howard H.]

I got a box of hinges at an auction yesterday and it had an odd type
PTO adapter Ive never seen before. What could this fit??

 

[coonie minnie]

Kind of looks like it could adapt a boar pig to 540...

 

[Dieseltech]

An overrunning adapter that is missing some parts?

 

[olgentdc]

lol ,,,. good answer

 

[Howard H.]

(quoted from post at 18:54:57 11/13/22) An overrunning adapter that is missing some parts?

Maybe - but it has pipe wrench teeth marks on the outside like it was tightened onto something threaded.

Just haven t ever seen that before and I ve seen a lot of tractors over the years.

He had an old Fordson, an IH M, and I saw some JI Case three point arms in the junk pile. But that s about all was left around the old farmstead

 

[Athol Carr]

The IHC 10-20 and 15-30 tractors had a left-hand screw thread on their PTO shafts, probably an adapter to accept later PTO machines which assumed splined shafts.

 

[4wdtom]

If that's what it is it is probably valuable to a guy with one of those tractors. It looks like it might have a left hand thread. Looks like the start of a thread at the 2 o clock position under his finger and then it seems to go deeper as you go c clockwise.

 

[Athol Carr]

Yes a left-hand thread, A right-hand thread would have undone itself under load. I think the 10-20 was 1 inch left-hand thread but I do not know what size the 15-30 had. The later Farmall (Regular) had a 6 spline shaft and all IHC tractors that followed had 6 spine shaft, either 3/4 inch (Farmall F-20 and F-12) or 7/8 inch F-30 and these sizes carried over to the letter series until early 1940s when all standardized on 7/8 inch. My O-12 (1936) and W-4 (1941) have the 3/4 inch PTO.