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Not quite sure just what you damaged by driving the PTO shaft in but I can tell you how to get it out without splitting the tractor. 15-20 years ago the original PTO shaft on my 51 8N with 3-speed Sherman (3-speed PTO) broke off just outside of the tractor. I was unable to remove the shaft even though I used a slide hammer puller. Turns out the shaft was imperceptively twisted due to heavy use with heavy duty cutter in LO PTO. Could not perceive the twist even after removing the lift cover but it was there and it does not take much to prevent the shaft from sliding through the pump collar. Remove the lift cover and the transmission cover. Drain the oil. Cover all exsposed machined surfaces with metal (tin cans work well) and/or thick and wet cotton cloth. Cut the PTO shaft off on both sides of the pump (not too close to the pump) with a cutting torch. Remove the pump with the segment of PTO shaft therein. The rest of the PTO assembly will be easily removed from the rear. Grind the cut-off PTO shaft to a taper such that all damaged surfaces resulting from the cut-off are removed. If the shaft is twisted as was mine, you will need to drive it out of the pump. It is surprising what the aluminum frame pump assembly will tolerate if properly supported. In your case, the new shaft should not be twisted and should slide out easily. Dispose of the hammer after driving the PTO shaft from the pump. Of course you should check the pump for damage. In my case, I spent about an hour driving the twisted PTO shaft out of the pump using a 12 pound sledge with the pump supported on an Osage Orange block. I took the pump apart expecting to find extensive damage but found none. Reassembled it with no new parts and it still works like new 15-20 years later. Be sure to support the pump uniformly. Good luck. Dean
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