Question on touch control arms

[Workinprogress]

Still learning a lot on the farmall cub. I pulled the touch control box off the tractor and started to prep for replacing seals.

I noticed lots of wear on one arm (inner one) but little to no wear on the other arms (holes and pins).

What attachments would run on this arm and cause this much wear?
With the arm removed I will likely try to repair the wear. What is the correct size hole?

Also I noticed on the other arms that the edges are pretty rough. Looks like when the part was cut/sheared the cut wasn’t clean. Not sure if this is original or if someone repaired them. I will try to get a better picture tomorrow.

[Jim Becker]

The arm with a lot of wear is for the Fast-Hitch helper spring. Look at the pictures in this post.
viewtopic.php?f=1&t=107766#p854882

[tst]

I have found that the fast hitch rod that goes in that hole is many times installed backwards so it wears out the hole that bad, when installed correctly the cotter pin on the rod should face out

[Peter Person]

Since the rod is 3/4”, a 25/32” hole would seem reasonable.
Mine is worn as well, but not as much as yours.
I give all of these type connections a shot of white lithium grease several times a year, especially in the winter when I use the tractor the most for plowing snow.

[SamsFarm]

Back when I bought my 1968, mine was worn some and there was a groove worn 1/2 way through the rod.

I welded up the rod and remachined it to .750".

Then bored out the arm and made a flanged bushing!

Mine requires a bit of grease now because the clearances are much tighter.

Cant remember for sure, but I probably made the hole in the bushing .755"

It is holding up well, getting close to 20 years since that been done!