[Farmall] 100 breaking crankshafts

[Al Jones]

George,

That must be the difference.  After all there's not a terribly large
load pulling a tobacco setter or a cultivator.....

Al

-----Original Message-----
From: farmall-bounces at lists.antique-tractor.com
[mailto:farmall-bounces at lists.antique-tractor.com] On Behalf Of George
Willer
Sent: Monday, May 01, 2006 11:36 PM
To: 'Farmall/IHC mailing list'
Subject: RE: [Farmall] 100 breaking crankshafts

Al,

It's hard to imagine, but you can do an experiment that will show you
what
happens.  Take a stick shift pickup and allow it to slow to a crawl in
the
highest gear.  Then give it full throttle and it will usually shudder.
That's the torsional vibration of the entire drive line, everything in
the
drive line is flexing including the crankshaft.  It's that vibration
that
can break the crank.  Tractors do it too when they are pulling a load at
low
RPM.  Light loads won't do it.

George Willer  

> -----Original Message-----
> From: farmall-bounces at lists.antique-tractor.com [mailto:farmall-
> bounces at lists.antique-tractor.com] On Behalf Of Al Jones
> Sent: Monday, May 01, 2006 11:02 PM
> To: 'Farmall/IHC mailing list'
> Subject: RE: [Farmall] 100 breaking crankshafts
> 
> With all the slow-speed tobacco setting and first cultivating these
> tractors did, I can't imagine that the crankshaft would break just
from
> operating at low RPM's.  It looks to me like there must be an internal
> fault somewhere.  Had the crankshafts been welded (welded up and
turned
> back down to spec)?
> 
> Al
> 
> -----Original Message-----
> From: farmall-bounces at lists.antique-tractor.com
> [mailto:farmall-bounces at lists.antique-tractor.com] On Behalf Of John
> Hall
> Sent: Monday, May 01, 2006 8:48 PM
> To: Farmall/IHC mailing list
> Subject: Re: [Farmall] 100 breaking crankshafts
> 
> Supposedly the guy was cultivating--shouldn't have hurt anything---but
> then
> again I wasn't there to tell you if he was using it like it should
have
> been. I hope I get to hear how this one turns out.
> 
> John
> 
> ----- Original Message -----
> From: "George Willer" <gwill at toast.net>
> To: "'Farmall/IHC mailing list'" <farmall at lists.antique-tractor.com>
> Sent: Sunday, April 30, 2006 8:51 AM
> Subject: RE: [Farmall] 100 breaking crankshafts
> 
> 
> > 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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> >
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> >
> 
> 
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