Shawn, same thing happened to me when I changed trans/hyd fluid. I believe the accepted replacement is SAE 10W30 which John UK recommends and I swear by his advice; or the more traditional GL 1 90 gear oil, a mineral based oil. From what I am told the vescosity has nothing to do with the leaks, moreover it's how it was filled. The pros say put in 2 gallons initally, go read a book, then come back and top the system off. Probably would be a good idea to go finish the book before you fill the last gallon or so. I am told this is necessary due to possible worn cluth seal allowing oil to leak into the cluth housing and other places it shouldn't go. In so far as leaking at the drain plug I'd guess try some teflon tape around the threads on the plug or look for a crack around the housing. In so far as the PTO leaking I'd say it has to be a oil seal or gasket. My PTO shaft leaked from day one so rather than pulling mine and rebuilding it I ordered the 1 3/8 PTO shaft assembly as an upgrade and slid it in bolted it down, no problems. In my case I had a bad left side axle seal and ordered all the parts to replace seals, bearings and brakes since the leaking oil corrupted my left side brakes. (Doing both sides since I have it jacked up and blocked). Mine did not leak until I changed the fluid and the tempature got hot which I guess is just normal thermal expansion and if a seal etc. is worn it will leak. I like you was and am still very curious as to why it didn't leak before I changed fluid? Since the seals etc. are 1953 originals I figured it was time to replace them. If it still leaks then I wasted a couple hundred bucks a whole lot of time. The beer has been good and cold during the rebuild process so far.
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Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
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