olblu49,
I have found the small hex on the tube fitting almost always is rusted quite tight. Even with a flare nut wrench, you end up rounding the fitting. I use a nice sharp pair of vise grips, cinch them down tight so they won't slip and bust the fitting loose. It can then be removed with a flare nut (tubing) wrench or conventional open end wrench.
Nothing should come gushing out, in fact, little will actually drip out. Bleeding will be in order..the brakes, not the knuckles.
Stuart
