2015 international prostar Cummins isx15
like the title says. Trying to chase a new leak. Takes half a day to completely leak out. When I’m attached to a trailer it doesn’t leak. Any suggestions?
Losing air while bobtail and detached from trailer.
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by rjustin140, Nov 28, 2020.
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Tractor protection valve?
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Levelling valve on suspension ..
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I second the tractor protection valve as the culprit. Anything air suspension related will be worse hooked up due to higher weight / pressure.Rideandrepair and truckdriver31 Thank this. -
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