Hello everybody, I have volvo 2012 670 d-13 engine my problem is that the truck builds up air more than 120 up to 160 psi in the primary tank but the secondary remains normal 120psi i replaced the air governer that i thought was the issue but still the same , any ideas on what could be the issue ?
Not having an air system schematic available to me my best guess is your governor could be sensing off the 120 psi tank but a bad 2 way check valve is causing most of the air to go to the other tank?
