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RJ Hamner

Has Anyone Ever Seen or Know a Reason For This??

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RJ Hamner

I was breaking down the engine getting it ready to go to the machine shop. Everything was pretty normal until it tried to remove the PTO race and the engine pulley.  As I was setting up the "puller" I noticed the end of the crankshaft looked different but never gave it much thought.  After a half a can of PB Blaster,destroying the engine pulley and turning the air in the shop blue I was able to get the crankshaft free.  There was a LOT of baked on crud and grease and I thought that was the problem.  Cleaned everything up and found the race would not slide on the crankshaft???  Got out the measuring tools and found the answer.  The end of the crankshaft was expanded will past the 1.125".

I had another crankshaft so I looked at the PTO end.  It almost looks like someone bored the end and inserted some kind of tapered shaft and/or beat the heck out of the end and swelled the last 1/2"-3/4" of the crankshaft.

 

Can anyone think of a reason???

DSC_0791.JPG

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Achto
57 minutes ago, RJ Hamner said:

beat the heck out of the end and swelled the last 1/2"-3/4" of the crankshaft.

 

This would be my guess. This can happen when a puller with a cone shaped end on the screw is used. Specially if tension on the puller is followed by hammering the end of the puller.  

Edited by Achto
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ol550

:think: :text-yeahthat:

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WHX??
6 minutes ago, Achto said:

This would be my guess

:text-yeahthat:Mushrooming is the correct term. Don't ask me how I know :hide: Most of my 'rooming work has been on small 1/2" electric motor shafts although I could see it happening with brown welded steering wheels & hubs. Perhaps the machine shop can take it back down a few .001s

Edited by WHX20

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Short Circuit

It looks like a bolt broken off flush with the end of the crankshaft. As far as the ring of deformation goes, it does look like a wheel puller damage. Just my thoughts...

 

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pfrederi
37 minutes ago, Short Circuit said:

It looks like a bolt broken off flush with the end of the crankshaft. As far as the ring of deformation goes, it does look like a wheel puller damage. Just my thoughts...

 

:text-yeahthat:

 

Most all crankshafts were drilled and taped for a bolt.  Your bolt head is gone just the shaft remains and it was damaged by a puller

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