[Farmall] 100 breaking crankshafts

[bsdunek at ismi.net]

I'm not sure how the main caps are on a C, but on cars, they would
remove some of the material off the mating surface of the cap.  This
would reduce the opening size, then it could be line bored to
standard size.  The cap to block interface usuelly has a stepped
configuration so it will always align, and this has to be milled with
precision.
Bruce
>
>---- Original Message ----
>From: jthall at worldnet.att.net
>To: farmall at lists.antique-tractor.com
>Subject: Re: [Farmall] 100 breaking crankshafts
>Date: Sun, 30 Apr 2006 07:24:54 -0400
>
>>
>>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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