Truckers Report Jobs

Find Trucking Jobs

Company Driver Company Driver Dry Van Dry Van Flatbed Flatbed Refrigerated Refrigerated Specialized Specialized Owner Operator Owner Operator
More Trucking Job Searches ⌄ Fewer Trucking Job Searches
⌃

no air to the blue airline

Discussion in 'International Forum' started by andre, Sep 8, 2013.

  1. Sep 8, 2013 #1
    andre

    andre Medium Load Member

    341
    172
    Feb 10, 2008
    Jacksonville, FL
    0
    Hi guys,

    I think I have a problem that should be simple to diagnose, but I haven't found it yet:

    I've got a 2005 9200i with a cat c13. This issue is there is no service air coming to the blue airline when I press the brake pedal. There is air in the tanks though (I pulled the air release on both tanks just to make sure air was in there and the tank didn't need to have condensation drained - both tanks spit out compressed air), and the compressor runs and fills the tanks. I took off the blue airline just to make sure it wasn't pinched or plugged, and no air is coming out of the brass coupling either. The tractor brakes work. The red airline works (I set the brake and a steady stream of air comes out).

    Would you all have any ideas or suggestions regarding this? I appreciate this and thanks in advance.
     
    andre, Sep 8, 2013
    andre, Sep 8, 2013
    #1
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  3. Sep 9, 2013 #2
    379exhd

    379exhd Road Train Member

    2,925
    3,149
    Jun 25, 2012
    rolling through hell
    0
    You had the supply pushed in when you were checking to see if air was coming out of the service line right? I don't want to treat you like an idiot or anything but I have made that mistake before and thought my brakes were not working and realized my supply was pulled.
     
    379exhd, Sep 9, 2013
    379exhd, Sep 9, 2013
    #2
    andre Thanks this.
  4. Sep 9, 2013 #3
    baha

    baha Road Train Member

    4,137
    2,834
    Jul 25, 2013
    ga
    0
    CK. tractor protect valve, (last valve under bunk valve keeps air from blue line when bobtailing red butt; out. if bad no air will pass.AR. ex. 1 will pull blue line have U step on brake if air comes out with red BUTT. out UR O.O.S. they go bad.This scale master will CK .
     
    baha, Sep 9, 2013
    baha, Sep 9, 2013
    #3
    andre Thanks this.
  5. Sep 9, 2013 #4
    Heavyd

    Heavyd Road Train Member

    7,626
    6,027
    Feb 4, 2009
    0
    With the red button pushed in, and then with a brake application you should have air out the blue line. If no air, the tractor protection valve is the usual culprit. Some trucks were built with in-line quick release valves at the base where the blue line threads into at the back of the bunk. If you have one, take it off and make sure it isn't plugged or stuck.
     
    Heavyd, Sep 9, 2013
    Heavyd, Sep 9, 2013
    #4
    andre Thanks this.
  7. Sep 9, 2013 #5
    spacetrucker88

    spacetrucker88 Heavy Load Member

    784
    385
    Jan 24, 2012
    warfordsburg pa/ Red Cloud,Ne.
    0
    Do you have the yellow button pushed in? Check simple things first
     
    spacetrucker88, Sep 9, 2013
    spacetrucker88, Sep 9, 2013
    #5
    andre and baha Thank this.
  8. Sep 17, 2013 #6
    andre

    andre Medium Load Member

    341
    172
    Feb 10, 2008
    Jacksonville, FL
    0
    Thanks everyone who responded. Honestly, a tractor protection valve. Never heard of it ever. Could something that breaks like that get any more obscure? Anyhoo, my breaks are back up and running at 100% just in time to miss the FDOT break check week.
     
    andre, Sep 17, 2013
    andre, Sep 17, 2013
    #6
    Heavyd Thanks this.
  9. Sep 17, 2013 #7
    Heavyd

    Heavyd Road Train Member

    7,626
    6,027
    Feb 4, 2009
    0
    That is a rare part to fail. I don't change too many.
     
    Heavyd, Sep 17, 2013
    Heavyd, Sep 17, 2013
    #7
  10. Sep 23, 2016 #8
    EverLuc

    EverLuc Light Load Member

    295
    101
    Feb 18, 2013
    0
    Ok. So new question. When we push the red button in, no air comes out of the red glad hand. Yet, when we push both in, air come out of red glad hand. 96 Pete 379. We just r&r'd the manifold dash valve with no change in performance.
     
    EverLuc, Sep 23, 2016
    EverLuc, Sep 23, 2016
    #8
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

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