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  #111  
Old 08-15-2008, 11:35 AM
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  #112  
Old 08-15-2008, 12:19 PM
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Quote:
Originally Posted by Red_Chili View Post
There was a fella welding on a semi tractor I heard about. Everything was painted, but he found a convenient ground - the bolt on the harmonic balancer. Very good ground, welds came out great.






The semi wouldn't run, wouldn't crank, nothing. All the main bearings were welded solid.
I've always wondered if that was true or not. I was told the same story except that it was Cat D6 he was welding on, not a semi. I'd always sort of assumed that was urban legend.
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  #113  
Old 08-15-2008, 12:47 PM
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I see absolutely no reason to doubt that this would happen. In fact, it would most likely have to happen. It might turn over, but would sound like all heck broke loose as the crank ground itself against at least one melted bearing.

The only part of it that makes it suspect is that someone would be so dumb. But then again I have done enough dumber things as to lend credence to the story!
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  #114  
Old 08-15-2008, 03:39 PM
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Originally Posted by Red_Chili View Post
How many beers would it take to get you to give TIG lessons?

I have a HF TIG welder that Beater gave me, not much, but it would make a great place to start. Haven't touched it since he brought it over. Gotta get a bottle of Argon I guess, first. Can't do it with Argon/CO2 mix?

Hey Drew, be SURE your ground is good and close to the weld. DO NOT GROUND TO YOUR ENGINE BLOCK. Ground to the exhaust ONLY.
I have one of those magnetic mount grounds and it works great so I can ground right to the headers.

Thanks!
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  #115  
Old 08-15-2008, 03:48 PM
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bad news on mag mounts. Do not place them too close to the weld area. the arc will be affected by the magnetic field
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  #116  
Old 08-15-2008, 04:32 PM
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Quote:
Originally Posted by Red_Chili View Post
How many beers would it take to get you to give TIG lessons?

I have a HF TIG welder that Beater gave me, not much, but it would make a great place to start. Haven't touched it since he brought it over. Gotta get a bottle of Argon I guess, first. Can't do it with Argon/CO2 mix?

Hey Drew, be SURE your ground is good and close to the weld. DO NOT GROUND TO YOUR ENGINE BLOCK. Ground to the exhaust ONLY.
Wouldn't take any beers... but 'm probably not the best one to give lessons.. I learned from an an old hotrod guy in a fab shop I worked in for a while.. everything he showed me was seat of the pants. I don't know the proper terms and methods. But i'd be happy to get ya started. It mainly just takes practice ( i know you know that). It's nice though because it's not as messy as GMAW welding so you can practice without "dressing up" for it.

I have never had good luck with 75/25 TIG welding. The CO2 contaminates and burns up the Tungsten, and generally gives a pretty crappy looking weld. You could borrow my argon tank anytime though.. it'd save you having to buy one. It's just a general air swap out deal-e-o. I could bring it to a meeting. I have been Mig welding most stuff lately anyways.
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  #117  
Old 08-15-2008, 04:35 PM
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oh yeah, if the headers have dirt/mud crusted on them at all be sure to grind it off before you start... while you can burn through most things, that crust that develops on exhausts WILL NOT BURN OFF. Save yourself the headache and prep it nicely.

let me knwo if you want me to swing by when you weld it up...
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  #118  
Old 08-15-2008, 04:41 PM
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if anyone wants to play tig, just contribute to my gas fund, and you can play away... argon is pricey and goes quick on tig (air cooled)
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