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Implement Alley Discussion Forum

Repair of worn teeth on cast gear???

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Mark Kluber

05-07-2007 06:16:10




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I have a cast iron gear on a Champion potato digger the teeth are wearing down. Any way to repair them? The part is next to impossible to find. Thanks, Mark




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plowboy1

05-09-2007 19:21:41




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 Re: Repair of worn teeth on cast gear??? in reply to Mark Kluber, 05-07-2007 06:16:10  
Everyone has thier own tricks for dealing with cast iron! This is mine(yes, I get paid to weld) and I've had very good luck with it. Build a charcoal fire and put your part in it. This warms it gradually and I believe inparts some carbon into the iron. Remove from coals, do your welding (keep part out of cool drafts), return to coals to cool off(let the fire go out). Also, inbetween weld passes, tap on the part with a dull chiping hammer or a small ballpeen hammer ( this is called peening an it relieves some of the stresses in the iron caused by the weld). While the fire is going, you can cook the burgers-seriously!! Sorry for going on, some guys will say this is crazy, but it has worked many times for me and the cool down leaves the part "soft", no glassy hard spots. Good luck

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Jim in Ma.

05-07-2007 18:11:57




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 Re: Repair of worn teeth on cast gear??? in reply to Mark Kluber, 05-07-2007 06:16:10  
I have built them up with hard-face welding rod, the only problem I had is - if built up too much it's hard to grind back down with a grinder.



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Mike (WA)

05-07-2007 17:01:10




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 Re: Repair of worn teeth on cast gear??? in reply to Mark Kluber, 05-07-2007 06:16:10  
I had a neighbor who borrowed my equipment from time to time, and unlike most borrowers, if anything went wrong, he actually fixed it! The bull gear on a hay baler always puts the stress on the same gear teeth on the compression stroke, and two teeth broke off while he was using it. He built them back up with cast iron welding rod, then "machined" them down with a grinder until you couldn't tell which teeth he fixed. I used the baler for several more years, without incident.

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El Toro

05-07-2007 09:41:15




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 Re: Repair of worn teeth on cast gear??? in reply to Mark Kluber, 05-07-2007 06:16:10  
There was someone on the Farmall forum that had a relative that was a machinist and was making gears. I would put this request on the Farmall forum too, to see if he responds. I should've written his name down. Hal



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flying belgian

05-07-2007 07:20:02




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 Re: Repair of worn teeth on cast gear??? in reply to Mark Kluber, 05-07-2007 06:16:10  
You should be able to build them up with brazing and then shape them with grinder and file. I bet it is a big slow turnig gear so does not have to be real presission.



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