In Reply to: What size over run posted by David on September 17, 2019 at 10:51:54:
I wouldn't buy anything without measuring first. Original was 1-1/8" but many have been replaced with 1-3/8" shafts.
All of mine came with a tight-fitting roll pin that was supposed to be hammered thru the shaft to hold them on. That pin makes the coupler much harder to remove. I replace my roll pins with a piece of mild steel round bar, or cut the head off an ungraded bolt that fits loose. I also replace the zerk fittings with flush allen head plugs. Stick one zerk in long enough to squirt grease in there. The grease zerks can get broken off or catch and wind stuff around the PTO shaft.