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Tractor Pulling Discussion Forum

Alright puller and machinist extraordinares.....

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Screamin DC

05-06-2004 20:00:52




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I'm preparing to start welding up my crank. What type of welder would better suit such task, MIG or stick? Also, what type of rod or wire should I use? Thanks in advance.




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maco

05-08-2004 09:39:12




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 Re: Alright puller and machinist extraordinares... in reply to Screamin DC, 05-06-2004 20:00:52  
stick weld--7014 1/8 rod works great. Also preheat with torch.



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Acme Eng.

05-07-2004 07:52:43




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 Re: Alright puller and machinist extraordinares... in reply to Screamin DC, 05-06-2004 20:00:52  
Mig, Who is going to straighten if for you and regrind. You should ask them for the advise.



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Paul

05-06-2004 20:39:39




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 Re: Alright puller and machinist extraordinares... in reply to Screamin DC, 05-06-2004 20:00:52  
i hpoe I dont come of as a smart a88 here but if you have to ask proably should not do.

there are a lot of tricks to welding a crank keeping it straight and reenforcing it.getting hot enough but not too hot.

a mig would be by far the best choice. it will be a cleaner weld,and probably a lot easier to control heat mild steel wire would be my first choice maybe someone else can help yet.

Paul

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Spencer

05-08-2004 18:52:54




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 Re: Re: Alright puller and machinist extraordinare in reply to Paul, 05-06-2004 20:39:39  
mad matts right you shouldn't do it. but if you did i think stick would be best and theres some rod thats really good for it but i forgot what it is. you should pre-heat it and weld it then heat it immediatly after you weld it so to spread the heat out so it don't cool to quickly and crack.
Spencer



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mad matt

05-09-2004 06:58:54




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 Re: Re: Re: Alright puller and machinist extraordi in reply to Spencer, 05-08-2004 18:52:54  
thats if the crank is cast I think most cranks in tractors were forgings the thing with mig a lot of people don't get there setings right and get cold laps which you might have anice looking bead but it didn't bite into the base metal hardly at all then you have the problem with warpage heat the metal on the build up side of the rod journal and will probably take off I'm not try insult any bodies welding but I do for a living and I wouldn't mess with it ascrewd up crank can do more than wreck the you could break rod and make windows in the side of the block thats wht I say leave it to the pros who do this day in and day out you'll save in the long run

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mad matt

05-07-2004 07:03:23




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 Re: Re: Alright puller and machinist extraordinare in reply to Paul, 05-06-2004 20:39:39  
Iam a welder and I wouldn't touch it with a ten foot pole if it was mine it costs to much money and time for that guinnea pig to leave a broken engine on the track spend the money now so you don't pay even more later



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