Aux Air System Leaks

[Lee Bornstein]

My 97 Liberty Classic has developed a leak in the Aux Air System. Small electric compressor used to run about every 12 hours. Now it's going on every 15-20 minutes. Compressor runs till pressure reaches 75PSI then stops. Starts again at 55-60 PSI.

Only Items I know of that run from this compressor are: Bed Lift, Black Dump Valve and Grey Bypass Valve. I've checked the control valves and fittings for those three items and no leaks. Don't have Air Operated Pocket Doors.

What an I missing?

Lee

[MangoMike]

Lee,

In the drivers steering bay is where the air feeds these lines.

Air comes out of this xmas tree at the shut off valve on the left.

LeeAir_2842_2.jpg

Then feeds into this manifold, then off to bed, chair etc.


LeeAir_2841_2.jpg

Soap spray all these connections.

Hope this helps.

Mike

[rfoster]

Lee: Don't forget the floor slide/step cover, and entry door lock, and drivers seat. Maybe even the generator air bags, air conditioner bellows, engine fan bag. The valve over the engine doors was/still is leaking on mine.

[Lee Bornstein]

Roger:
Believe floor/step cover and Door Lock are on operated by air produced when engine is running. I will trace hoses and see what I can determine.

Lee

[dalej]

And the level low or air bags. If the air is leaking out anywhere to do the leveling air bags it will loose air and the aux. tank need filled.

[Lee Bornstein]

Have isolated problem. Removed and capped air hoses at manifold as shown by MangoMike. The hose going to the Grey Bypass/Black Dump valves is the culprit. Once that line was capped havent had compressor run in over 3 hours so far.

Tomorrow I will go further on that air line.

Air Lines on my manifold are as follows:
1. Fat Hose Air IN from Aux Compressor
2. Fat Hose Air Out to Prevost system (Via Converter Valve)
3. Thin Hose Out to Step floor cover valve
4. Thin Hose Out to Bed Lift valve
5. Thin Hose Out to Waste Dump Valves
6. Fat Hose Out to someplace under the dash - dont know what it is yet

[lewpopp]

Has anyone rebuilt the small compressor in the front left of the coach. I replaced it and kept the old one and looked into the rebuilt kit, but I have as of now not worked up enough guts to order the rebuild kit. I have no idea what it will entail.

Lew

[dalej]

If it's a Thomas it cost about as much to rebuild as replace. I know it's hard but seem companies just want to throw stuff away. Mine they wanted 2oo and something for the kit, I bought a pancake compressor for 160.

[truk4u]

Lee,
Anything that runs off the aux tank will cause your aux compressor to run if pressure drops after engine shutdown. Your airslide would receive it's air via the aux tank and not directly from the engine compressor. Be sure to check the airslide regulator (in the steering bay) with soapy water. Mine leaked and I took it apart and replaced an o-ring.

[lewpopp]

Dale

Did you put the pancake compressor in the steering bay? How did you mount it? How much pressure can you get? I'd like to change my air reel to that if I can get enough to pump tires to 110 lbs. Could I trouble you to show a picture?

Lew