Hello, I've been reading this site for a few weeks now to get some info before tearing into my first tractor rebuild. Near as I can tell, I have a 1968 Super 12. Model number is 25350, engine number is 602112.
This is what it used to look like.
This is what it looks like now.
I have lots of pictures but I'm evidently not very good at posting them here.
My first question is: how do I get the key out of the crankshaft without harming anything? I'm talking about the key on the flywheel end. I've already removed piston and cam, valves and crank are still in.
This motor was started a few weeks ago prior to it becoming a project. Ran if for a couple of minutes and then shut it off. Indoors, carbon monoxide built up quick. Lots of oil all over engine and tractor but the internals look pretty good to me. Piston has discoloration on both pin sides. Lots of carbon build up on piston and valves. There was wet oil covering the head gasket but the gasket is not blown. I have had no trouble at all removing any bolt on this motor and was surprised at how easy the head bolts came loose.
That last paragraph is for the guy that's been there and done that.
I'm going to put a rebuild kit to use on the motor whether it needs it or not. All that oil had to come from somewhere even though the rings look good. They were loose on the piston, the edges are sharp and there is no scoring at all on a perfectly smooth bore.
Well, this should be enough to get us started. Thanks for reading.