T680 air system

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Hacksaw7684, Feb 23, 2024.

  1. Hacksaw7684

    Hacksaw7684 Bobtail Member

    Feb 23, 2024
    I am having a new issue on my 2014 T680. My secondary air supply is building before my primary. I have no water in the system. My first thought is check valves. When draining my air tanks independently both gauges will drop to about 80 psi then only the tank I'm draining will drop to zero. In my mind it shows normal check valve operation. Is there any other fill control devices other than the check valves? Any input and guidance would be greatly appreciated.
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.