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air compressor

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Robert Mathis:
My 12volt air compressor runs about every hour or so. I can't find a leak and the system very rarely adjusts the airbags. Has anyone else had a similar problem? If so, how did you fix it?

Gerald Farris:
I am not positive how your air leveling system works, but all of the air leveling systems that I have worked on (mostly HWH) only run the 12V air compressor when two conditions are met. First the system is re-leveling and second the tank is below the the preset cut off switch pressure of about 105 PSI.

So if your 12V air compressor is running every hour or so, you have a very small air leak in the suspension somewhere. These types of leaks are usually very hard to locate, and can take a long time to find, but they are usually easily repaired. The cost is almost always in finding the leak.

It helps sometimes to let the coach set with the leveling system turned off and see which side or corner drops first. If the coach does not drop after setting a day or two, the leak is probably in the leveling system.  

Gerald        

Robert Mathis:
Thanks, Gerald. I seldom hear the system adding air to the bags, and this happens even when the air leveling system is turned off. I'm wondering now if the air pump itself might be leaking back thru the check valve.? We have looked for a leak without success,  so my plan now is to disconnect the line out of the compressor, cap it and see if the pump runs.

Gerald Farris:
Robert,
If the compressor runs with the leveling system turned off, you need to find out what is controlling the compressor circuit, as there is no need for the compressor to run if the leveling system is not functioning.

If it is wired to maintain pressure in a storage tank, there may be a leak in one of the connections to that tank, but if the compressor runs that much, it can run down batteries if it is stored and cause premature failure of the compressor.

It is also possible that the leveling system is activating the compressor when it should not be.

Gerald

Robert Mathis:
It will definately run the chassis batteries down. I've had that happen several tiimes. I hope to have some time this weekend to try to get in there and unhook and plug the line to the pressure tank and see if i can find the leak.

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