[RussWhite]

Here are some images to view.
I included pictures of the parking brake valve so you can see how there are not enough threads exposed to really give the nut a good chance to hold it in place. You have no chance of ever catching this one before it's too late because as soon as the nut is loose, it is off and when you push the valve just goes back into the dash and you are stuck right where you are for a while. As all coaches are different this may not apply to you, but checking is not real easy. You will have to drive the roll pin from the parking brake knob, remove the knob, then remove the trim piece ( held on with three nylon grips - just pull straight toward you and pull hard ). I will be adding Loctite to the threads in hopes of holding the nut in place. I see no easy what to make the bar that it mounts through thinner.

You will be the hose has a fitting on only one end. The service guy reached up toward the end that attaches to the coach and cut it with his knife. I think this make getting to that fitting up there easier. That fitting was not involved with the failure and when I got to loot at it, there were no issues.
You will also notice the pictures of the female threads show a very shiny sure on the boss of the canister. This is where the service guy used a high speed grinder in an attempt to grind down to good threads. That did not work as you can see the remaining threads are damaged.
Russ