Chock your wheels, release your emergency brake, start your engine and run it until the compressor kicks out - your gauges should show at least 120 psi, maybe as high as 150. Turn off the engine and hold your foot on the brake pedal for at least two minutes and listen very carefully. Ideally you have someone else on the brake while you're outside listening all around the coach for any air escaping. If your gauges drop more than 10 or 20% max. you have an unacceptable air leak / loss somewhere. If you don't you may very well have a faulty gauge, but this is quite unusual? Don't forget that one of your tanks provides air to your suspension as well as the brakes, assuming you have air suspension? You really should do this test regularly to be sure you don't have leaks. Our brand new Revolution need two valves replaced on the rear axle with less than 2500 miles on the clock. Our '08 Tiffin 42' tag had three leaks, all fixed by tightening and relocating hoses, in the first year. This stuff happens which is why you have to do your daily "checks"? Good luck.
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Tony & Yolanda / Katie & Spencer (the Doodles)
2011 Fleetwood Revolution 42W (450/1250)
2008 Jeep Grand Cherokee (Diesel) behind
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