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« Last post by Eric Maclean on March 18, 2024, 04:14:48 PM »
The air leveling compressor usually uses a separate tank and has a check valve between it and the coach air supply so the little compressor doesn't have to try and keep the chassis air tanks topped up it only maintains the small tank for air leveling purposes.
You should be able to drain all the chassis air tanks and wait for several hours or days to see that the check valve holds air on the small air tank,
This will mean getting to that small tank to open the drain ( which is a good idea anyway as most never get drained)
That small tank should hold air and of course the small compressor is there to keep it topped up so that when the chassis air is depleted the leveling system can still maintain level.
But of course you could use the pipe plugs to eliminate the whole circuit temporarily to be sure.
I usually start with the accessories feed lines ( suspension, HVAC, horns )at the tanks do one line at a time pressurize the tanks and wait to see if it makes a difference if not leave that one plugged and move on to another line until you have found the culprit.
Once you've found the effected circuit then you can check each connection and component on the circuit until you find you leak.
Start by checking the ride height control valves as they move constantly and tend to develop small leaks over time.
Also check all the push to connect air fitting as they tend to leak .
Most coaches have a multitude of small leaks and ( you know death by a thousand cuts).
The question is how far do you want to go to cure them.
Good luck and have fun
Life's to short not to
Eric