Auxilliary air supply 2006 Newmar Essex 4508

[JVR]

Before taking off, I connected my tire pressure monitor and found a rear with only 60psi. Previously, I found the air quick connectors in the front and in the engine compartment and I made-up an air line for just such a need, but the air supply was not sufficient to add air. I have been unable to find any information in the volume of books that came with the coach. Many thanks to anyone who can explain how the air supply works.

[JVR]

Before taking off, I connected my tire pressure monitor and found a rear with only 60psi. Previously, I found the air quick connectors in the front and in the engine compartment and I made-up an air line for just such a need, but the air supply was not sufficient to add air. I have been unable to find any information in the volume of books that came with the coach. Many thanks to anyone who can explain how the air supply works.

[Lug_Nut]

Welcome to the forum JVR. The air outlets should be sufficient to top up your tires, at least somewhat anyway. It is however very slow and somewhat more difficult when trying to inflate over 90 PSI. The compressor cycles between about 90 and 125 PSI, therefore if the air is at 92 PSI, for an example, it will not inflate above that, nor will the compressor necessarily increase that pressure until it has reached the cut in point of say 90 or so.
These are not designed for tire filling but are primarily used for servicing such as towing if the unit is disabled. External air pressure can be added to air up suspension and release the Maxi-Brakes.
They can however be used to top up tires, albeit, slow work. A small portable compressor capable of 150 PSI is really more ideal.

Peter

[Route 66]

JVR, welcome to iRV2.

As Peter has noted, using coach air doesn't work too well at higher pressures.

Some have had better success by running the engine and filling the tire when the air compressor reaches maximum pressure.

I have a small 150 PSI compressor that works very well.

[racer0624]

JVR,
Your situation sounds pretty much like one I had. When trying to air it up it just "hissed" like I wasn't making good contact. I found that the core valve was loose. Tightened it and the tire took air just fine.
Also, by using the coach air supply I can get my front tires up to 115#'s(slowly) by keeping the chuck on the stem until the dryer cycles.

[JVR]

Thanks everyone, at least now I understand it doesn't respond like a compressor, the small compressor up front used for air leveling threw me a curve.
Although, I cranked the regulator in to no avail. Now, I'm concerned that I have it out of adjustment.
Thanks again,
Virgil

[Lug_Nut]

Hmmmmmm..... There is no small compressor in the front. The compressor is located on the left rear of the engine, when viewed from the engine access door. It is part of the engine assembly. You may have adjusted an in-line air pressure regulator, and yes, if so, you have changed a setting value that was probably adjusted for your current set up.. Anyway, don't let it ruin your day. It may change your ride feel, but will not change your ride height. It can be reset later and really isn't a precise setting anyway. So, relax and enjoy your weekend.

Peter

[JVR]

Mine definitely has a compressor up front and an Aux Air switch built in the dash beside the Batt Boost switch. Holding the switch starts the compressor,; I'm told the compressor is for air leveling when the ground won't support the hydraulic jacks.