[Farmall] 100 breaking crankshafts

[George Willer]

John,

It's my understanding that the bearing caps can be milled down slightly and
then torqued back up before the assembly is line bored back to original
size.

The one thing in common with all 3 broken crankshafts is the operator
working the engine at low RPM.  That's a no-no.  I think that is the cause.

George Willer

> -----Original Message-----
> From: farmall-bounces at lists.antique-tractor.com [mailto:farmall-
> bounces at lists.antique-tractor.com] On Behalf Of John Hall
> Sent: Sunday, April 30, 2006 7:25 AM
> To: Farmall/IHC mailing list
> Subject: Re: [Farmall] 100 breaking crankshafts
> 
> 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
> 
> 
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