Matt-
Re: Musroom'd crank-shaft...
First of all.. WHAT were you doing to that poor tractor that you managed to mush up the crank???
I'm going to give you a technique that I used on a tractor I owned which had the same thing done to it by a previous owner.
I need to be up front with the fact that I am NOT recommending this to ANYONE because it probably rates up there on the "Why Men Don't Live As Long As Women" scale...but it worked.
Also of note is that the engine in that tractor was basically junk. It was in need of a rebuild. (smoked and knocked) I would not do this to a good strong engine, I just wanted to get the "basket pulley" off without messing it up.
Here is what I did:
Step 1) Remove grill/hood assembly from tractor
Step 2) Start engine (idle speed...I actually turned the idle speed down as low as I could get it without the engine quiting.)
Step 3) Take a 4" angle grinder, turn it on, and VERY lightly touch the very TIP of the mushroom'd part of the crank, holding it there with VERY light pressure.
Step 4) Stop engine and check progress after every 3-5 seconds.
Now, I know this sounds hill-billy (and somewhat unsafe) but it worked very well, and I made sure I did it at a time that I was not rushed and really had things thought through.
The final note is that I approached the tractor from the side and came down on top of the crankshaft in such a way that the crank was rotating
AWAY from me. That mean if anything went wrong it would be pulling things away from me, not throwing them toward me. It also meant I was close to the key in the dash should I need to shut it down.
Here's the interesting part about this story. After I got the bulk of the "mushroom'd" material removed from the crankshaft, I dressed the area (engine still running) with a file, and then a scrap of sandpaper I had lying around. The end result was so perfect looking it was amazing. You could not tell ANYTHING was done to it, and the basket-pully slipped right off in my hand.
NOTE: Again, this is what I did. PLEASE do not take this as advise if you have ANY doubts about your abilities.
<FONT SIZE="-2">IMO, FWIW, YMMV, My $0.02, Yada, Yada, Yada...</FONT>