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In Reply to: frozen hydraulic filter-bolt posted by Dakota on Monday, November 02, 2009:
Can't advise on your question. However I have
had frozen bolts of that nature. WD-40 will
never get to the threads. Heat from a torch wont
make it to the frozen threads, The case will
absorb the heat and not the bolt threads. Been
there done all the above. Two ways we used in
the shop....first one more time and not so good,
cut off the bolt head and drill out the bolt.
Second one, the best and easy to do, Weld a nut
on top of the bolt head the same size or a little larger, weld through the nut hole to the
bolt head, wait untill the red heat from the
welding is cooled off, but not cool to the touch, That kind of heat will go to the bolt
threads, while still hot to touch, twist it out
with a wrench. I use Hobart 6013 rods to do this,and it works. If the housing the bolt is in
is aluminum, you can still do it but have to be
carefull with the heat from the welding. Go a
little at the time. CAUTION; I always cover all
the areas I can with wet towels, stops fire and
spark damage on paint. Clamp the ground cable
on a solid part of the housing close to the bolt. Careful not to clamp where the current may
go through bearing or the like.
Hope this may help some, if all else fails.
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