The Boss said just fix it and we'll send out the picture to our other shops with a memo to inspect it on other units.
It fell out as soon as I touched it with no wrench needed, but clearly this bolt had been screwed all the way in at one time, the orange threadlock is gone halfway down and
there are contact marks under the face, it apparently just wasn't tight enough and worked it's way out from the constant rocking back and forth.
I didn't test this theory but I doubt the coupler could come off even with the bolt gone, they plan for things like this and engineer accordingly.
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