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Tool Talk Discussion Forum

Anyone ever weld???

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deadeye

05-25-2004 05:50:08




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Has anyone ever welded the casting part of a Minneapolis Moline GTB radiator?? If so, please give details, welder, rod, temperture, preparation, and etc. I have a stick welder and wire welder in my shop. Thanks--deadeye




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Keith-OR

05-26-2004 10:30:28




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 Re: Anyone ever weld??? in reply to deadeye, 05-25-2004 05:50:08  
Here is a website about welding cast using acetyline and cast rod. very educational.
Hope this will help you..... ..Keith

http://www.cut-like-plasma.com/info_welding_cast_iron.htm



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george md

05-25-2004 11:01:52




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 Re: Anyone ever weld??? in reply to deadeye, 05-25-2004 05:50:08  
deadeye, For a weld in cast iron that has to hold water and look proper or be conceiled , you need to use oxy/acet cast iron and flux . The rod is cast iron in stick form , the same material as the piece you are trying to weld .The finished weld can be ground to match the base material . The base material does need to be heated to near 900 deg to get rid of the expansion ,so when it cools the base and the weld cool at the same rate and not crack. Arc weld is the worst choice for cast, next best is brazing and best choice is the oxy/acet cast iron welding . Below is a link to some manifold repair and other things , click on image to get full screen size image .

george

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John *.?-!.* cub owner

05-25-2004 10:40:59




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 Re: Anyone ever weld??? in reply to deadeye, 05-25-2004 05:50:08  
Not familiar with your tractor, but assuming you are taking about a cast iron casting, the entire casting needs to be heated to a couple hundred degrees or more, and the heat maintained while welding, then allowed to cool very slowly. Otherwise it will crack. if you don't have the skill and/or equipment to do theis, take it to a professional welder.



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Mike M

05-25-2004 09:15:31




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 Re: Anyone ever weld??? in reply to deadeye, 05-25-2004 05:50:08  
If this part is supposed to hold coolant it will be very hard to avoid hair line stress cracks that will seep antifreeze. I would first try to advertise here for a good solid used one.



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RobertTX

05-25-2004 06:49:49




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 Re: Anyone ever weld??? in reply to deadeye, 05-25-2004 05:50:08  
I am not familiar with your Moline, but I have welded the tanks on my Case Ls. The material was probably about 3/16" when new, and due to corrosion was less than that when I repaired it. I used a Ni 99 rod on the stick welder on AC. The Ni 99 is lower strength than the Ni 55 and is less likely to cause cracking. That is why the Ni 99 is recommended for small parts. Grind a U, not a V, and weld less than an inch at a time, peen immediately after you lay the electrode down and allow to cool before making the next weld.

Cast wire is available for the MIG, but a little expensive, I have not used it. Many people have great reports about brazing, I am not up on that either. Whatever way you go, it can be done, just requires a little extra patience.

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