Replacing Lift Arm Balls on a 3-Point Hitch

I recently bought a 3-point conversion kit (two lift arm spears and a center link bracket) for a 350 Utility. The balls in the lift arms are badly pitted and worn pretty thin. They could stand replacing.

I can get the old balls out easily enough with a hacksaw or Sawzall, but I’m wondering about how to get the new balls in. (I’d rather just install new balls than have to weld complete new housings to the ends of the spears.)

I suspect the answer may be to find just the right size O.D. balls and have a machine shop “pop” them into place with a press; then maybe even peen around the housing holes to deform them a bit to discourage the balls from falling out.

Then again, I could turn down the diameter of the balls just enough so they’d slide in, then lock in position as soon as they rotate. Then they’d have to be “properly” aligned to fall out.

Am I on the right track with either of these approaches? Any suggestions?

Thanks –

Mark W. in MI
 
On newer tractors you simply cut off the entire left arm ball joint end and install new unit. And I asume you can do the same on a 350. New ones are available at ag supply stores and I assume thru YT. Need to match up size and angle (if any). Not a job for an amateur/occasional welder. I had mine replaced on the IH 4166 by a retired CAT welder and they came out great!
 
Thanks, James. I thought that might be the usual method. I think you're right that this particular welding job is best done by a professional.
 
Yeah, there's no replacing just the balls themselves. It's way more than just a simple interference fit on the balls. I believe the housings are machine forged around the balls; they're open, the ball is slid in, then the housings are "squashed" down around the balls with an incredible amount of force from a large press.
 
That sounds logical. Still, I could swear I've seen individual balls for sale at TSC and similar places. Do other manufacturers (maybe the green gents) use a splittable housing with replaceable balls? (Just curious.)

Mark W. in MI
 

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