hitch conversion

last I knew pins were available in various diameters, anywhere from $8 to $80 at your local tractor dealer or hardware store. If you have something unique, we need more specifics..
 
If you are wanting to put snap-coupler AC onto a fast hitch Farmall I don't think there is a commercial conversion available.
 
Don't think its possible- AC implements have a loop that attaches way up under the tractor, and the pull the implement makes on the loop is what senses draft, and causes the snap couplers to raise of lower. IH 2 point is a completely different setup, with no hookup under the tractor- just the two hollow arms at the back. I think it senses draft by the pull on the arms, but I've never used one, so not sure. Even if you could physically hook the AC implement to the IH, it wouldn't sense draft, and wouldn't work worth a darn.
 
The Snap-Coupler IS the bell-shaped housing under the middle of the tractor- not on the lift arms. Common mistake in terminology. The linkage in the Snap-Coupler is what senses load and accomplishes draft control by slightly raising and lowering the lift arms, adding implement and soil weight to the rear wheels. There are washers next to the spring under the tractor- they are adjusted per specific factory measurement, and there is a linkage connected between that and the hydraulic pump. AC does not sense pull on the arms- all the arms do is raise and lower the implement. 3ph systems do sense pull on the arms. AC is upside down to that. As far as adapting to AC- the implement would hang 3 feet behind, no draft sensing, etc.
 
My bad. I always assumed the little thingies on the lift arms that try to snap your fingers off when you close them were the "snap couplers". Seemed like an appropriate name, as you try to stop the bleeding.

Only thing in your answer that I would take issue with is your statement that "3ph systems do sense pull on the arms." Some do (Oliver 4 digits, for instance, and many later tractors,) but many sense draft from the top link (All the Fords, IH, 550 Oliver, Ferguson, etc. etc.).
 

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