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crack chasing demo hammer housing

Discussion in 'Other Construction/Demolition Equipment' started by oceanobob, Nov 26, 2018.

  1. oceanobob

    oceanobob Senior Member

    Jun 13, 2010
    general contractor
    oceano california
    This housing version has a bit of a stress riser where the box is cut away and the bents are welded. Noticed some cracks and did the usual stop drill and v groove out. All is well until I decided to look inside the welds by polishing the profile of the crown.

    Will likely run a gusset to mitigate the probable recurrence. Hoping this repair weld will buy some time.

    V groove w rotary file
    PB250658.JPG PB250659.JPG

    Ready to weld w 7018 and weld w porosity
    PB250661.JPG PB250664.JPG

    Flap disc works well to remove splatter, blend arc strikes, and remove ripple to allow fairing....and it also allows a little peek inside the weld. Thinking the casual spray w carb cleaner didnt adequately clean the crack and should have maybe ran the torch over it....too late now, the cooties are in the metal.
  2. grandpa

    grandpa Senior Member

    Oct 16, 2009
    northern minnesota
    You can take a tig welder, turn the heat down as low as it will go and still melt a tiny puddle... you can then chase those little "cooties" away.