I'm thinking it happened an hour or two before I finished Mowing.....but that's just a guess.
I cleaned the area up around the hole.....it was as dirty as the rest. The back of the tractor was dirty before but the leak attracted a lot more dirt. I had been mowing about 4 acres....not sure when it happened.....as I noticed it after I was done mowing.
Yeah the end of the "bolt" almost looks made that way.
I am confused about just where the fluid is coming from......I'm assuming it's around the flat spot on the "bolt". I couldn't really see up in the flat spot hole there to know for sure whats what. I may try to look in there with a laser pointer. I don't live near my tractor otherwise I'd go look now.
I don't think it was a sight window.....but I wouldn't bet money on that
I haven't looked at my parts manual, but is it possible that these two plugs cover the holes for shift rods, and that the thrust of a rod travel has pushed the plug out?
FYI**The plug is 1 of 2 and it is found on pg 172 in the Chasis Rear Axle/ PTO shaft (46) Pg # 173 part # 7 and covers the shaft/pto fork, so a rubber plug may pop out. BUT you should look into why the shaft forced the plug seal out anyway. fjb