Category 1 or 2 hitch.

61uni · Mar 25, 2021

Can someone tell me which one this is?

Brian G. NY · Mar 25, 2021

Category Tractor Power Lift arm pin diameter
1 20-45 HP 7/8 in (22 mm)
2 40-100 HP 1 1/8 in (29 mm)
3 80-225 HP 1 7/16 in (37 mm)
4 More than 180 HP 2 in (51 mm)

That ball doesn't seem to be for any std. 3PH

Jim.ME · Mar 25, 2021

Cat 2, 1" pin ball for a top link with interchangeable balls so it can be used with Cat 1 or Cat 2.

Janicholson · Mar 25, 2021

.9375= 15/16. or about 23.8mm, so ? Worn a lot, or shrunk Nah can't be. Jim

Jim.ME · Mar 25, 2021

In the picture, the caliper appears to be laid down and out of square in the bore so I was guessing based on those things the reading is smaller than the actual bore size. If that is a square, centered, true reading; I don't disagree that my guess is wrong, they don't shrink. In that case it may be a worn 7/8 ball from a Cat 1 lift arm. Or it may not have a thing to do with a 3 point hitch.

glennster · Mar 25, 2021

could that be part of an old trailer hitch ball? i have a few old ones that came apart like that 1 7/8 i think

glennster · Mar 25, 2021

or for a convert a ball hitch

61uni · Mar 25, 2021

Apparently I was measuring the top link pin instead of the pin that goes through the ball.

Jim.ME · Mar 25, 2021

(quoted from post at 19:33:41 03/25/21) Apparently I was measuring the top link pin instead of the pin that goes through the ball.

3/4" diameter top link pin is for Cat 1. Cat 2 top link is 1" diameter.

Where/what is this ball from, or is it something you found?

Texasmark1 · Mar 27, 2021

I didn't go out to the shop and mike the inserts for a comparison to what you are showing, but the Ford 3910 is setup with Cat II lift arms but has removable inserts like that whereby you can insert a Cat i or II socket to fit your implement.

Shetland Sheepdog · Mar 27, 2021

Removable ball for lift arm, Category one!
Most likely Ford/NH!
Pin is Cat one top link pin!
HTH. Dave

Category 1 or 2 hitch.

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