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How Can I Fix This? Passanger Cross Member Broke

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Old 11-15-2007, 11:37 AM
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Originally Posted by EverydayDiesel
If he gets good penetration, which i know he will.

Will this weld last or is it time to look for a new truck?
If it's a good weld, the weld wont give out. The original metal around it is another story tho. But I would worry about it. I'd keep the truck.
Old 11-15-2007, 11:45 AM
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Would it be possible to contact the previous owner and ask what they hit?
Old 11-15-2007, 11:51 AM
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I'm thinking that it's going to be hard to get that clean enough to use 7018 rod on it..and 7018 ain't the easyest to get a welder to want to use,overhead,and sideways.(I'm not saying that 7018 would not be best,just tough to get a good,pretty weld with there)

I'd MIG it,and fishplate it,looks to me like that truck did a slide into a ditch,most likely cracked for quite some time,just finally broke.
If it's reinforced well it should be fine (IMO)
Old 11-15-2007, 12:03 PM
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Originally Posted by REF>Lancer
I'm thinking that it's going to be hard to get that clean enough to use 7018 rod on it..and 7018 ain't the easyest to get a welder to want to use,overhead,and sideways.(I'm not saying that 7018 would not be best,just tough to get a good,pretty weld with there)

I'd MIG it,and fishplate it,looks to me like that truck did a slide into a ditch,most likely cracked for quite some time,just finally broke.
If it's reinforced well it should be fine (IMO)
Mig would be the last thing I would use there. Talk about a finicky welding process. 18 is the only way to weld that, with what has already been stated a fish plate if need be.
Old 11-15-2007, 12:13 PM
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He mentioned a wire welder, is that not the right thing to use? A wire welder is a mig?
Old 11-15-2007, 12:58 PM
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A mig is a wire welder. The mig does not perform well in dirty, rusty conditions. 7018 has far more ductile properties, which is what one wants on a dynamic load such as a frame. I have repaired lots of heavy equipment with dirt, rust and oil present in the repair area. To use a mig in those conditions generally brings out the porosity gremlin.
Old 11-15-2007, 02:43 PM
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Clean that crap up... support the engine... throw some leathers over the brake line... and go at it with a 6011!!!!!

Nothing you can't weld with a 6011... hahahaha......
Old 11-15-2007, 06:22 PM
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Originally Posted by mmurray
Clean that crap up... support the engine... throw some leathers over the brake line... and go at it with a 6011!!!!!

Nothing you can't weld with a 6011... hahahaha......
Including the crack of dawn
Old 11-15-2007, 10:12 PM
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Im curious, whats the warranty on these frames?
Old 11-15-2007, 10:19 PM
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Basic warranty applies. There is an additional warranty on "rust through" on the body but that is not your issue as it appears to me. Looks like there was some sort of excessive force put on the frame/crossmember that resulted in a crack. Not really a manufacturing defect in my opinion. You can always try though......what's the worst that they could say? LOL
Old 11-15-2007, 10:36 PM
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I figured it was a long shot. It looks like im going to have to take the spring/control arm out so i can get it compressed enough. I needed to do my ball joints anyways.
Old 11-15-2007, 10:58 PM
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To the untrained eye that does look sick. But a good welder will and can fix it. Good luck bud.
Old 11-19-2007, 12:47 AM
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I'm with the 7018DC crowd- maybe a 6011 pass first w/a 7018 cover. YES, it will hold if you get it good and CLEAN (be **** about this w/a wire wheel) and he is a good welder. Quite a few guys like to "practice" on important stuff like this; have him show you an overhead before he touches your rig!

but it gets the farmboy/fab shop nod from me to weld.
Old 11-19-2007, 10:42 AM
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I've only been repairing stuff like this for 30 years, but here's what we'd do:

Reasonably clean the weld zone.

Reposition crossmember correctly.

Run a root pass with a DC "digger" like 6010 or just use 6011 "farmer rod".

Clean the heat-stripped weld zone.

Fill/cap with 7018 all around.

Weld in gusset plates (no scabbing, please! )

Your CTD will break before the repair does.
Old 11-20-2007, 03:47 PM
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I never like to count my chickens before they hatch but heres the pics of after the welding. Lets hope its fixed, ive only driven about 5 miles so far on it.

Its also welded on the inside of the frame but I couldnt get any pics of that since Ive put everything else back together










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