first things first:
Cummins 400 hp M11 engine

background:
I have been blocked from my normal summer travels by a severe back problem. Barth has been sitting, moved 50 feet once, for about 10 months. Being more well, I decided to check her readability, at least enough to safely go to town for a full service. Everything looks ready to roll except an air hiss in front. An air hiss I have heard before. I do not think it is normal. Or maybe it is...

The problem:
There is a metal "tank" the size of soft ball, with two air hoses emerging from the bottom. They slip into a hole, not onto a stub connection. There appears to be some entrapment mechanism inside the hole that normally catches the hoses. The hiss is caused by one of thee hoses not staying in the hole, even if I push it back in, until some pressure is bleed off, and then it will stay in the hole.

oh wise ones:
What is this mechanism, what does it do, why is it bleeding air? Is it air overpressure? Or a bleed for some other reason?

How do I get the hose to stay permanently, perhaps replace with a new hose?

need more info?
email me please. Thank you vury, vury mush!

What you are seeing is the vacuum canister the hose you are trying to reattach is coming from a venturi vacuum generator which is probably shot. Check this link http://barthmobile.com/eve/for...87061/m/635108001and also
http://barthmobile.com/eve/for...1087061/m/8473956567

Ok, I am aware of nothing on my Barth the requires vacuum. So could I simply plug the air leaks and move on?

You need vacuum to operate your dash heater and ac. On gassers you also might need it for cruise control.

quote:

Originally posted by garryp:
Ok, I am aware of nothing on my Barth the requires vacuum. So could I simply plug the air leaks and move on?

The only thing I need it for is the heater controls. I need heated air to defrost the windows in Minnesnowta. I took the dash air completely out. My cruise is electronic. I had to have the vent controls working

Ahh, ha! Thanks. Why didn't I think of that!

I have two vacuum generators. One in the engine compartment for the cruise control and the second up front to operate the heater controls. Both work just fine.

you have red plastic hoses check for leeks might be your problem.
lenny