Aux Air Pressure?

[dreamchasers]

What Aux Air pressure does most use when the coach is parked? For example, when the coach engine is not running and the coach is parked. What aux air pressure does the air compressor come on and off?

Mine seems to come on at ~80 and off at ~100 psi.

Hector

[phorner]

Hector,

Mine is similar..... on at 60 off at 90.

That being said, we only need aux air while parked to operate the bed lift.

And, of course, airing up the occasional bicycle tire

[truk4u]

Hector,

60/100 for toilet only.

[Jon Wehrenberg]

I have backed mine down to on at 40, off at 80.

At the lower pressures the pump doesn't work as hard yet everything still works, doors, bed lift, door lock, floor slide (not needed, but it still works) generator air bags, and dump valve.

[Reagan Sirmons]

Guys,
I could not figure out how to start a new subject so I hope this gets posted on this old thread. For those who might note my posts are more regular over the last 60 days...this is what happens when a AAA personality ends up with half a day every day at present free to tinker...
Here goes: When I turn the ignition key to the "on" position, there is a distinct hissing sound coming from the right side drive axle area. When I turn "off" the key, it stops. I can run the engine and turn off the key and there is no escaping air. HOWEVER, when I turn the ignition key to "on" and the hissing begins, I can reach up to the Country Coach installed leveling device high on the front ceiling and turn it on...the hissing then stops immediately. The leveling device switch, when activated, shuts the escaping air off. If the air is allowed to escape, the air pressure in the on board air compressor declines.
The coach does not have any leaking air bags and the selector switch on the left panel is in the correct position. ... what does anyone think is causing the hissing escaping air when I turn the key on? Is there a leveling device at this location? I am not about to get under this thing to look even though I have bus blocks. Something tells me that potentially varying air pressure and weight do not mix well.
Thanks for your thoughts.
Pres

[Gil_J]

Reagan,

First, congrats on the free time!

When the key is off the air bags are sealed from the rest on the bus' air system. When you turn the key on the bags are being controlled by the ride height valves. When the key is on your HWH leveling system goes into "drive" mode, which puts the Prevost system in control. With the key on you can turn on the HWH level system which takes control of the bags and takes the ride height adjusters out of the picture. So, your symptoms suggest the hissing could be from the ride height valve. If so, let the coach get to ride height and see if the hissing goes away.

You should be able to reach in front of the drive tires and feel the air coming from the valve, if this is the leak. Here's what it looks like. The hose aimed straight down is attached to the exhaust port and would be were it's leaking, if it's the internal piston and o-ring that is leaking. You should be able to safely do this without getting under the bus.


Ride Height Valve.jpg