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Loss of air pressure

Discussion in 'Trucks [ Eighteen Wheelers ]' started by texasmorrell, May 20, 2013.

Page 1 of 3
  1. May 20, 2013 #1
    texasmorrell

    texasmorrell Medium Load Member

    597
    625
    May 3, 2012
    Lone Star State
    0
    I quickly lose all the air pressure in my number one tank when I push down on the brake pedal. I have to apply the parking brake when I'm stopped at stop lights. I can hear air escaping from underneath the cab. I only lose air pressure when I apply the brake pedal. When I let off the breaker pedal the air pressure builds back up again. Any ideas what's causing it?
     
    texasmorrell, May 20, 2013
    texasmorrell, May 20, 2013
    #1
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  3. May 20, 2013 #2
    DGStrong71

    DGStrong71 Road Train Member

    1,279
    407
    Feb 22, 2013
    70° west
    0
    The DOT will find it for you for a fee. You should just call road service out.
     
    DGStrong71, May 20, 2013
    DGStrong71, May 20, 2013
    #2
  4. May 20, 2013 #3
    fortycalglock

    fortycalglock Road Train Member

    6,160
    6,602
    Jun 25, 2011
    Tourist Town, FL
    0
    You have a bad brake chamber.
     
    fortycalglock, May 20, 2013
    fortycalglock, May 20, 2013
    #3
  5. May 20, 2013 #4
    DGStrong71

    DGStrong71 Road Train Member

    1,279
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    Feb 22, 2013
    70° west
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    Its funny how you can know that without even looking at it. I have had bad valves and air line fittings with similar symptoms. It can be anything.
     
    DGStrong71, May 20, 2013
    DGStrong71, May 20, 2013
    #4
  7. May 20, 2013 #5
    CatPowerC15

    CatPowerC15 Medium Load Member

    347
    91
    Feb 18, 2010
    Siler City, NC
    0
    Not necessarily, I'd say foot valve maybe.
     
    CatPowerC15, May 20, 2013
    CatPowerC15, May 20, 2013
    #5
  8. May 20, 2013 #6
    Cranky Yankee

    Cranky Yankee Cranky old ######

    15,317
    210
    Jan 31, 2012
    Green Bay Wi
    0
    i would say he has no buisness moving the truck
     
    Cranky Yankee, May 20, 2013
    Cranky Yankee, May 20, 2013
    #6
    tinytim and Hegemeister Thank this.
  9. May 20, 2013 #7
    TennTrucker

    TennTrucker Light Load Member

    250
    168
    Aug 20, 2010
    Dresden, Tn
    0
    If he truely has 16 yrs experence as his profile states, and doesn't know the answer to this then he doesn't even need to be driving at all.

    sent from my Galaxy Tab2
     
    TennTrucker, May 20, 2013
    TennTrucker, May 20, 2013
    #7
    snowblind Thanks this.
  10. May 20, 2013 #8
    texasmorrell

    texasmorrell Medium Load Member

    597
    625
    May 3, 2012
    Lone Star State
    0
    Who said I was moving the truck anymore?
     
    texasmorrell, May 20, 2013
    texasmorrell, May 20, 2013
    #8
  11. May 20, 2013 #9
    texasmorrell

    texasmorrell Medium Load Member

    597
    625
    May 3, 2012
    Lone Star State
    0
    I have a very very good idea what it is. But I wanted a second opinion. I was hoping a know it all like you might give me some more perspective. Too bad when you ask a question on this board most of the responses you get are nothing but smart ### comments. Then again maybe you're just covering because you have no idea what it is. In any case I asked for comments on what the problem might be not your comment about whether or not I should be driving.
     
    texasmorrell, May 20, 2013
    texasmorrell, May 20, 2013
    #9
  12. May 20, 2013 #10
    DGStrong71

    DGStrong71 Road Train Member

    1,279
    407
    Feb 22, 2013
    70° west
    0
    Nobody could possibly know what the problem is without actually looking at it. All anybody could offer you is suggestions that you probably already know about since you are a veteran driver. I'm sure that that's the reason for all the smart ### comments.
     
    DGStrong71, May 20, 2013
    DGStrong71, May 20, 2013
    #10
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