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Old 03-20-2011, 09:46 AM   #1
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Low air buzzer

2003 HR endeavor. Low air buzzer and warning light won't go off. Air pressure goes up to 130 lbs,but buzzer and light won't go off. Coach seems to be leaning down on right front. Trying to head home. Any help greatly appreciated.
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Old 03-20-2011, 01:28 PM   #2
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On my rig, I would leave the park brake off, with wheels blocked and on level ground. Then with the engine off, I would pump the air down to about 30 lbs which is past the buzzer alert and popout stage. Start the engine and see if the system recovers to cutoff pressure and eliminates your symptoms.

It should take about 3 minutes to get to 100 psi.

The above is part of the air brake test required as a commercial driver pre-trip.

Maybe something that simple will override the problem?
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Old 03-20-2011, 01:37 PM   #3
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Uh, right front air bag failed?
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Old 03-21-2011, 07:05 AM   #4
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Found the problem. Stuck air valve to r/f air bag. Rubber mallet to valve worked wonders.
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Old 03-21-2011, 07:45 AM   #5
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When was the last time the desiccant filter was changed on the air dryer system and when was the last time both air tanks were purged for moisture. Could be you have moisture in the air system that caused that problem.
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