[Farmall] 100 breaking crankshafts

[John Hall]

If I ever here the "rest of the  story" on this one I'll be sure to let you 
guys know. While it may not be proper to drive the pulleys on, I've seen it 
done too many times without problem. Also seen it done properly using a 
piece fo threaded rod--my prefered method.  Another reason I doubt that is 
the cause is because the 1st shaft broke in the same manner,and the owner 
hadn't been doing any work on the tractor that I am aware of. Dad 
reccomended the guy take the engine to the guy that does our machine work. 
I'd never use that block until it was checked for alignment thru the mains.

Related story--I was working on an F-12 for a guy. I had the pan off for 
some reason. I looked up and the block had been welded on the inside all 
around the front main. Wonder how long it was ran after that? Can you have 
the block line bored where the mains go? If so do the bearings then have to 
be custom made?

John