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Old 04-22-2013, 01:50 PM   #15
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1993 33' Land Yacht
Midland , Michigan
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92Landyacht, it is a P30 chassic and your right it is all air suspenion with no leaf springs. I'm very happy with the ride.
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gloran - 1993 LY MH 33' - Banks System, Steer Safe, IPD front stabilizer, Super Steer - Bell Cranks, Motion Control, Coil

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Old 04-22-2013, 02:02 PM   #16
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1982 28' Airstream 280
Port Angeles , Washington
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Quote:
Originally Posted by gloran View Post
Dan when I bought the coach in 2002 I read through the Owner Manual cover to cover. It mentioned the air tank and the need to drain moisture out of it routinely.There was a drawing showing where it should be located under the coach, wasn't there. Then as I started investigating other systems I found numerous things changed and not where the manual said should be, and the manuel stated there could be changes.I've tried to follow the 1/4" air line and have been able to follow most of it from the compressor down to the drivers side frame back to the rear air bags,and with the painting time spent under it I haven't run accross any tank.
There is a small plastic tank about the size you discribed above my compressor. This tank has no draining valve, I have air horns and from the compressor a yellow airline goes to this tank and then on to the air horn. the red air line goes to the air bags. I always figured this tank was just for the air horns, maybe this is the tank?
It was kind of hard to see what was actually happening in the picture but if that tank is connected to the compressor that also supplies the air bags then that is the tank. I see a solenoid valve there which could be the noise you mentioned. Like I said before the check valve protects the compressor from hard starting against high tank pressure. It also prevents tank pressure from bleeding off back through the compressor valves. When I bought my new Viair compressor it came with a check valve with the warning that removing the check valve would void the warranty. It is not an Airstream only kind of thing.

Now back to you original problem, I would look at your leveling valve or valves. If you squirt them with soapy water and don't see any bubbles, also squirt all the fittings, put the exhaust tube from the valve in a jar of water and watch it for awhile for bubbles. If the valve is leaking internally it will exhaust air through that tube. This is assuming there are no leaks around the compressor and plumbing up front. Be aware that a solenoid or check valve up front may also be leaking so you may need to tap into a fitting somewhere to install a gauge to monitor the pressure at the tank.

Good luck.
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Old 04-23-2013, 08:44 AM   #17
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1993 33' Land Yacht
Midland , Michigan
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Thanks Dan, I'll start with the valves and fittings up front and work my way back to the air bags and leveling switch.
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Old 04-23-2013, 02:40 PM   #18
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1992 33' Land Yacht
Evans , West Virginia
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Mine sags too after a week of setting and it is loosing air somewhere. I always kinda thought mine was leaking at the drain valve so it didn't bother me, self water removal
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Old 04-23-2013, 03:26 PM   #19
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1982 28' Airstream 280
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Just for informations sake these are mechanical systems with moving parts and seals and valves and they all operate in dirty, less than desirable conditions. A little leakage is not the end of the world. In the trucking industry a driver must do a check of his air brake system every day. That system is allowed a couple of pounds of leakage over a 5 minute period. Add a trailer and you are allowed more leakage and still be legal.

If your air system holds for a few days that is good. If it holds for several days or more that is even better. The real issue is does it operate properly while going down the highway. You can drive yourself nuts trying to get too perfect. Even something like a tire which really has no moving parts to seal will leak air. That's why we check them every day.

Lets all go camping.
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