The air tube is way easy to get off. Once degassed, the main tube unscrews by hand easily. Once the tube is off, the front end needs a wrench for about 4 turns then it unscrews by hand. However, nothing has to be removed to get at the Foster fitting. It basically unscrews by had after degassing.
I was real big on putting a couple of drops of silicone oil into the fitting so as to keep the internal O-rings nicely lubed. When I pulled the foster fitting, it was filled with oil. I cleaned out the body of the fitting with a squirt of non-chlorinated brake cleaner, re-lubed the O-rings in the fitting and the tube and put it all back together. At a full 300 bar there is no more bubbling out of the Foster fitting.
As some here suggested, maybe putting oil into the fitting is not such a good idea. Mark me down as agreeing with them.
Tony
