tsc 22 ton hydro tank crack

oilstinks Posted By oilstinks, May 22, 2011 at 5:30 PM

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  1. oilstinks

    oilstinks
    Feeling the Heat 2.
    NULL
    

    Jan 25, 2008
    459
    1
    Loc:
    western NC
    Ok so i finally got the time to try and fix the crack in my tank at the engine mount. I had it mig welded first but it still leaked. I fired up my stick welder on DC+ and used a 7018 rod to try and seal it. No good. Still leaks. Ground it down and went at it with a 6011 rod for more penetration and still have some pinholes. Seems like the oil residue is keeping the weld from making a good seal no matter how tall i build it up. It even cracked one weld while i was welding on the opposite side of the mount. So the fluid is vaporizing and keeping the weld from sealing off is all i can figure. Yes i did drain the oil. I also used thinner to dry up the oil on the outside of the metal. Do i just need to try some epoxy or try brazing it? I think ive slowed it down and just got two small holes now but it seems i just keep moving the leak every time i try to weld it. thanx
     
  2. KYrob

    KYrob
    Member 2.
    NULL
    

    Jan 8, 2010
    146
    0
    Loc:
    KY
    Are you leaving the fill cap off as a vent when welding? May also want to try Tig welding it as that seems to work better than mig or stick on things like that.

    Good Luck,
    Rob
     
  3. Elderthewelder

    Elderthewelder
    Minister of Fire 2.
    NULL
    

    Nov 1, 2006
    644
    163
    Loc:
    Everett, Washington
    Any chance of grinding the repair weld down and welding a patch around the cracked area? sometimes better to do that than try to weld a crack on contaminated metal

    If you know how to TIG weld that is the process i would use, you can go rent a machine from a welding supply store, and as stated above, leave the cap off the tank and any fittings that can be left open should be as well to relieve the pressure from the heat and welding gas
     
  4. oilstinks

    oilstinks
    Feeling the Heat 2.
    NULL
    

    Jan 25, 2008
    459
    1
    Loc:
    western NC
    yea i unscrewed the fill cap. The main leak is right at the bottom tip of the motor mount at the right angles.
     
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