The box just being out of adjustment will cause a lot of "slop".
The pin out of adjustment, the lower cap not tight on the bearings.
The pin should wear on the sides, unless someone has been turning it randomly. It doesn't look worn to me. No way it could be worn evenly. I'd say you just need to clean it up, lube and adjust it.
Don't listen to Vrobert, he thinks you can take apart and rebuild sealed bearings. He doesn't have good judgement on worn parts, or apparently understand how to fix things.
I don't think it looks like the pin was bottoming out, but you should readjust it and make sure it isn't anyway.
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