Thanks to all who have helped with suggestions on the Yanmar 226D with a broken clutch housing. Since I have gotten several suggestions for welding it, I have called around the local area, and have found a guy who will weld it using tig and nickel rod, and has a JD tractor with a welded back axle housing that has been in use for about 6 years. He has a pallet fork on the 3 point of the JD and says he routinely handles 1500 lbs with it.
I guess I will give him a try. Expensive, but not as bad as junking the tractor. He says it will be about $600 because it takes about 12 hours to heat, weld, cool, ping and then repeat that cycle for every inch of weld to prevent stress cracking.
Wish me luck please, and thanks for all the suggestions.