07 Pete 387 losing air while driving
Discussion in 'Peterbilt Forum' started by devildog3531, Oct 3, 2016.
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Hope this helps. May NOT be specifically for your truck.
http://www.suspensionspecialists.com/techinfo/Bepco_Air_Brake_Trbl_Chart.pdf -
It it coming from the Air Springs, Brake Valves, etc. -
If it only leaks when brakes are charged it's most likely a chamber... another common issue with leaks when engine is running is the fan hub
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