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Massey Harris & Massey Ferguson Tractors Discussion Forum
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Welding a crack in 202 Hydraulic System

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George n' Michi

11-26-2003 18:22:28




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Hi everybody,

After changing all sorts of parts, and patching enough leaks to sink the Titanic, I'm down to one bad one. The left rear arm of the hydraulic system, which functions as a reservoir, has a crack near the axle, which decorates wherever the tractor sits. Can I get my neighbor to Mig it closed for me without draining the fluid? Any other special procedures?

Thanks

George




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old

11-27-2003 16:07:29




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 Re: Welding a crack in 202 Hydraulic System in reply to George n' Michigan, 11-26-2003 18:22:28  
If its cast use Ni rod its a nickel rod and holds up better on cast then 6011 or 7014, its cost a little more but its worth the cost. But you will still need to drain it some and clean it up very good, and even after cleaning you will never really get a good weld because the oil soaks in to the metal. Hope this helps



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George in Mi

12-07-2003 07:53:00




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 Re: Re: Welding a crack in 202 Hydraulic System in reply to old, 11-27-2003 16:07:29  
Guys,

Thanks for all the good information. I think for now the J-B weld or silicone solution is the one I'll pursue. Maybe next summer I'll get serious about the weld option. Strikes me that if the medical community had a web site like this one all the patients would be better off!(maybe they do?)

Thanks again to everybody...



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Bob

11-27-2003 15:56:42




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 Re: Welding a crack in 202 Hydraulic System in reply to George n' Michigan, 11-26-2003 18:22:28  
Oil vapors in a closed space may explode when you weld or heat this thing to burn off the oil. It should be steamed out, and possibly filled with inert gas before welding is attempted.



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Thomas

11-27-2003 13:35:26




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 Re: Welding a crack in 202 Hydraulic System in reply to George n' Michigan, 11-26-2003 18:22:28  
I did a similar repair on my MF50, assuming the crack is underneath? You will also find a corresponding crack on the other side which will need to be addressed.

I drained off the oil, then (a bit dodgy) got the gas axe underneath to burn away as much of the surface oil and oil inside the crack as possible. Even so I could see oil leaking as I welded, so when it had cooled down I welded it up again...

Filled it with oil and of course it leaked so drained down again, smeared clear silicone sealant all over the weld and it stayed dry for about 5 years, although it did do some very heavy loader work before starting to leak again. In retrospect I might just use silicone next time.

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Larry Mills

11-27-2003 14:38:55




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 Re: Re: Welding a crack in 202 Hydraulic System in reply to Thomas, 11-27-2003 13:35:26  
Try J-B Weld



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rod

11-27-2003 03:37:09




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 Re: Welding a crack in 202 Hydraulic System in reply to George n' Michigan, 11-26-2003 18:22:28  
I would drain the fluid out and try to get the machine parked down hill or at least jacked up on a slope to get any that lays in their to run down hill then weld it up.
regards
rod



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Cosmo

11-27-2003 03:33:20




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 Re: Welding a crack in 202 Hydraulic System in reply to George n' Michigan, 11-26-2003 18:22:28  
I doubt that you can MIG the crack without draining the fluid below the level of the crack. The oil will contaminate the weld and cause it to be porous. It has to be completely clean for a quality MIG weld. I have made such repairs with a stick welder using deep penetrating rods such as 6010 and 6011. You probably don't need to drain the fluid using the stick if it is only under atmospheric pressure. Just clean the area as good as you can. Also drill a small hole if possible at each end of the crack before welding to keep the crack from propagating. Hope this helps. Cosmo

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George in Mi

11-27-2003 08:34:10




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 Re: Re: Welding a crack in 202 Hydraulic System in reply to Cosmo, 11-27-2003 03:33:20  
Great help! Thanks guys. I even have s stick welder, this'll motivate me to put the plug in for it on my 220 line!

Thanks Again

George



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Cosmo

11-27-2003 12:16:11




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 Re: Re: Re: Welding a crack in 202 Hydraulic Syste in reply to George in Mi, 11-27-2003 08:34:10  
You're welcome George. I hope your Thanksgiving is as good as mine. Let us know how the job goes. Cosmo



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Alvin n Ms.

11-28-2003 05:34:55




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 Re: Re: Re: Re: Welding a crack in 202 Hydraulic S in reply to Cosmo, 11-27-2003 12:16:11  
If you are still living after the job is completed, let us know how you did.



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