Constant air two trailer service brakes

Discussion in 'International Forum' started by Mschmidt, Oct 25, 2021.

  1. Mschmidt

    Mschmidt Bobtail Member

    2
    0
    Oct 25, 2021
    0
    The problem I’m having is there is constant air going through the trailer service line whenever you push in the trailer supply valve. Also the brake light is always stuck on as soon as you build a little bit of air in the system. I’ve replaced the tractor protection valve, and the foot-break valve, but neither of those solved it.
    The last thing I can think of would be the parking brake valves in the cab… would there be anything else anyone knows about that could cause this?
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  3. kwswan

    kwswan Road Train Member

    1,513
    7,047
    Jul 26, 2009
    mcminnville,tn.
    0
    Disconnect the blue line from the trailer. Is air coming from the gladhand on the trailer or the truck? If the trailer, then most likely you have a bad brake chamber. If the truck then you have a bad valve somewhere.
     
    feldsforever and Heavyd Thank this.
  4. Mschmidt

    Mschmidt Bobtail Member

    2
    0
    Oct 25, 2021
    0
    It’s coming from the truck, any ideas on what valves what caused it other than the pedal brake valve and the tractor protection valve which I have replaced?
     
  5. Heavyd

    Heavyd Road Train Member

    7,264
    5,468
    Feb 4, 2009
    0
    Your spike handle is down.
     
    Cattleman84 Thanks this.
  6. Cattleman84

    Cattleman84 Road Train Member

    7,239
    40,617
    Nov 1, 2017
    The Sticks, Idaho
    0
    Johnny bar is pulled
     
    Heavyd Thanks this.
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  • Draft saved Draft deleted