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Bobcat  > Skid Steers  > Stress cracks  
 
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 Author Thread: Stress cracks
ancomcabs is not online. Last active: 7/25/2014 4:52:02 AM ancomcabs
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Stress cracks
Posted: 02/05/2012 02:27 PM
My 630 may have these, does anyone know if this kit is still available? http://screencast.com/t/oP4OaotiR
Golden Gate is not online. Last active: 1/1/2013 4:42:34 AM Golden Gate
Joined: 18 Jun 2011
Total Posts: 37
 
Re: Stress cracks
Posted: 02/05/2012 04:52 PM

I'm comfused “MAY” are they at the knee joint?

 

ancomcabs is not online. Last active: 7/25/2014 4:52:02 AM ancomcabs
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Re: Stress cracks
Posted: 02/05/2012 07:06 PM
Lots of rust, if the cracks are there they would be very slight, probably need to grind down to bare metal to be able to tell for sure, that why I say "may"
Miker67 is not online. Last active: 12/14/2013 10:37:34 PM Miker67
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Re: Stress cracks
Posted: 02/05/2012 07:17 PM
Idk about the kits, but if it were me I would hit the welds with a wire wheel and a magnaflux kit before you go after things with a grinder.
Golden Gate is not online. Last active: 1/1/2013 4:42:34 AM Golden Gate
Joined: 18 Jun 2011
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Re: Stress cracks
Posted: 02/05/2012 08:07 PM
Screw the kits, DIY,(2)IMO if your suspected break is ACTUALLY in a weld and not in flat steel open it up with a grinder. Do yourself a favor if you are not the one WHO will fix it Don't be the one to open it up reason being you may create more work for the one that has to fix it. If you are thinking there are stress cracks there probably are. Myself I am a decent welder confident and comfortable doing it but when it comes to structure or safety I call  the professional(in my case its my friend) and I have seen cracks in both but IMO its hard to crack a proper weld usually you will crack the metal around it, in other words the weld is normally stonger then the metal around it. I have experiece with both issues a weld I would actually fix my self... stress fractures on the other hand I hand to my buddy just because it takes much higher heat and specialized sticks to do it right, carbon arc( I have had some really bad stress fractures) This is all in my opinion and I would be interested in hearing about what you find out
ancomcabs is not online. Last active: 7/25/2014 4:52:02 AM ancomcabs
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Re: Stress cracks
Posted: 02/06/2012 03:32 AM
Thanks for the advice. I will be gentle when removing the rust/paint once I get a chance to investigate and will post pictures. I too do a little welding but in this case could have a local shop take care of it for me if needed
Tazza is not online. Last active: 7/26/2014 12:19:32 AM Tazza
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Re: Stress cracks
Posted: 02/06/2012 02:12 PM

I have repaired some nasty cracks before in a machine i bought. I got into it with the plasma cutter go couge the crack out and used special rods that cut really deep. The trick is to weld, then grind it down till you see no areas that didn't take, then weld some more, then grind it again, repeat till the crack is totally filled.

I'd avoid MIG welders for this, they are good at depositing material, but i find if you don't direct the wire just right, it will not melt the base metal enough to stick as well as it should. Probably because most of the DIY people have shielding gas for light gauge metals (myself included) that is great for thin metal, but not as good as it should for heavy gauge.


Bobcat 763 burntSadbut i'm working on it!, 04 S150 with air and a smooshed cab, S250 turbo.
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