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Harry Ferguson Tractors Discussion Forum
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TO-20 Crankshaft

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clint(oh)

03-17-2007 11:09:28




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Took my crank to the machine shop a few months ago since it was in rather bad shape I was told they could build it back up and then take it back down to standard. I got a phone call yesterday (3-16) telling me that it was done and that it was 0.060 under, the problem is that I cant find the bearings for it so any thoughts/ideas/suggestions. And by the way what is the maximum tolerance you can take one of those old cranks? I havent paid for it or picked it up yet either.

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Crem

03-17-2007 18:39:14




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 Re: TO-20 Crankshaft in reply to clint(oh), 03-17-2007 11:09:28  
We put a lot of hours on a TO-20 with .060 bearings in it many years ago, but I don't know if they are available now.



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mike mcmurray

03-17-2007 14:17:23




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 Re: TO-20 Crankshaft in reply to clint(oh), 03-17-2007 11:09:28  
Hey all. I had mind ground down to .040 and was able to find bearings pretty easily. I remember prior to the work being done talking to a machinist and he told me that he could get .020, .040, and .060. He said many times bearing manufacturers will not do .050s.....you should probably talk with the machinist and tell him that there are .060s out there. If you have no luck, give Manchester Engine Rebuilders a call and ask for Gary (I'm in NH, but he could tell you where to order them from). The number is 603 669 2843. good luck. Mike Mcmurray

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Jim in OH

03-17-2007 12:44:40




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 Re: TO-20 Crankshaft in reply to clint(oh), 03-17-2007 11:09:28  
I wouldn't be afraid to put it back together at .060 under if I could find the bearings... but I haven't seen any... ask the guys who did it to supply the bearings (they have more sources than we do anyway) and if they can't find them, then you know your choices... but building it back up is not cheap either... It is about the same as a new crank.. I am having one built up and it is $450... Steps were (if I remember correctly).. weld up... straighten... rough grind... harden... finish grind....Jim

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CENTAUR

03-17-2007 11:24:43




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 Re: TO-20 Crankshaft in reply to clint(oh), 03-17-2007 11:09:28  
It does not sound to me that they BUILT IT UP.I think they should have went back to standard size.That is my understanding of what can be done.Someone correct me if I am wrong.CENTAUR



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Darren in TN

03-17-2007 11:28:45




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 Re: TO-20 Crankshaft in reply to CENTAUR, 03-17-2007 11:24:43  

Yeah, that's what I would expect, too-- welding it and then grinding it back to the original factory spec.



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CENTAUR

03-17-2007 12:58:58




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 Re: TO-20 Crankshaft in reply to Darren in TN, 03-17-2007 11:28:45  
I think CLINT should (GOGGLE) spray welding as there is a lot of good info there for us all.They were doing this in the 1940s when I was a teenager.The process as been much improved since then.I do not think CLINT owes any thing as they have not done what they said they were going to do.They probably do not have what it takes to do this procedure.CENTAUR



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Clint(oh)

03-17-2007 15:54:44




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 Re: TO-20 Crankshaft in reply to CENTAUR, 03-17-2007 12:58:58  
When I took the crank in I was told that it would be put on a machine and all the journals would be welded the same and then ground back down to standard. A few weeks ago I was told that they were unable to get the machine to work on this crank but they would weld it anyway, I dont know how they were going to weld it but apparently they did. When they called me yesterday I think if I understand it right they welded the worst journal (which was close to 0.080) up to 0.060 and then took the others down to 0.060, so they actually only welded one journal. This is the assumption I have and come Monday I will find out for sure.

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gerard

03-19-2007 15:17:12




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 Re: TO-20 Crankshaft in reply to Clint(oh), 03-17-2007 15:54:44  
Don't be concerned - I'd rather have a crank ground to -.060 than welded & ground to standard anyday. Proper stress relieving, re-hardening, straightening (is weld similar material?) - to do that properly would cost a lot more than a new crank. .060 bearings are available - just needs research.



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Irv ( Ia)

03-18-2007 19:05:07




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 Re: TO-20 Crankshaft in reply to Clint(oh), 03-17-2007 15:54:44  
Good Lord, don't you just love good communication.



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