> I have some safety gauges gleaned from some A series motors.
> Anyone have any ideas of how to get the nut off the bulb of
> the capillary tube without destroying the tube? I have them
> soaking in rust buster right now.
If I'm not mistaken, the bulb and probably nut are made of brass. Since rust
does not attack brass, a better approach might be to soak in a mild solution
of Draino in water. This should remove the brass oxides. Careful not to soak
too long, otherwise it will remove the brass as well.