That could be, but it's more likely that someone tried to remove the steering wheel by pounding on the shaft. That will knock that plug out.
On my 340 (I think they use the same gearbox) I tried to put a 1-7/8" steel freeze plug in there with it still on the tractor, but that ended in failure because the outer ring of the original plug was still in there. So here's what I did:
I got a washer slightly larger than the hole and ground the outer circumference until it just fit inside the casting, then I welded the center hole shut. I cleaned the washer and the area inside, outside and all around the plug hole with brake cleaner and compressed air and glued the washer in place with a big glob of silicone. I used a wooden wedge to hold it in place overnight while it cured. I was then able to fill the gearbox with Hytran and enjoy smooth power steering!
I plan on rebuilding the gearbox this winter, so this is only a temporary fix (or is it??)
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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