How to disable low air alarm

Discussion in 'Experienced Truckers' Advice' started by uplander, Apr 7, 2016.

  1. stayinback

    stayinback Road Train Member

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    Jan 24, 2014
    chicago,il
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    I have an air leak "somewhere" that Ive had over 2 years now that I can't find for the life of me....

    Its very slow because I lose about 5 pounds per hour..Takes 12 hours to empty the system when truck is parked. Pretty common.....You can't hear it Or,See it, But its there..Somewhere

    NO, Im not going to personally examine every Line and fitting on the entire truck (All 2,865 of them),So don't ask.
     
    Grubby Thanks this.
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  3. IH Truck Guy

    IH Truck Guy Road Train Member

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    Purgatory
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    1014049_499841126764891_255730668_n.jpg
    Easy way to check for air leaks.
    Just follow the bubbles. Lol
     
    Grubby, snowwy, Cattleman84 and 2 others Thank this.
  4. Bdog

    Bdog Road Train Member

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    Nov 6, 2014
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    OP's leak is 1/2 psi per minute. Your allowed what 3 psi per minute on a combo vehicle? His leak is 1/6th what is allowed and is not something super major to worry about. I agree it should be fixed but the leak at that rate doesn't make his truck inoperable.
     
  5. old iron

    old iron Road Train Member

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    Northern Wi
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    That's something you don't see every day.
    Wonder if at the last second he stomped on it trying to make it up the far bank?
     
  6. IH Truck Guy

    IH Truck Guy Road Train Member

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    Don't know.
    Just a pic I pulled off the net.
     
  7. dibstr

    dibstr Road Train Member

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    Mississippi
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    The 3psi per minute you refer to is in the CDL manual and is NOT a requirement, regulation, law or even a suggestion outside the CDL manual. It is merely a hoop to know and jump through in order to obtain a CDL. As a matter of fact, not one air brake test in the CDL manual is a valid test as written for enforcement purposes. In other words, no test in the CDL manual "as written" is valid or complying with federal regulations or the CVSA NASOOSC.
    The enforceable leakage rate is as follows:

    Air Loss Rate
    If an air leak is discovered and either the primary or secondary reservoir pressure
    is not maintained when:
    (396.3(a)(1))
    (1) Governor is cut-in;
    (2) Reservoir pressure is between 80 – 90 psi (551 – 620 kPa);
    (3) Engine is at idle; and,
    (4) Service brakes are fully applied.

    Additionally, "an audible air leak at other than a proper connection. (393.45(a)) is not allowed."

    I am not stating that the leakage rate tests in the CDL manual are bad, as they do offer a means of not only quantifying a leak, but they also help in diagnosing where the problem is. I however am stating that the leakage rates in the CDL manual are not criteria that drivers must abide by and maintain because of any regulations..
     
    flightwatch Thanks this.
  8. realdesertkickin

    realdesertkickin Heavy Load Member

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    Nov 18, 2013
    Tustoned Arizona
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    This trick, to bypass governor, also takes out all dash functionality, where the low air alarm happens and is displayed..

    bad joke no one got cept me...lol

    Yes fix the air leak yo
     
  9. realdesertkickin

    realdesertkickin Heavy Load Member

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    Nov 18, 2013
    Tustoned Arizona
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    Just run a scale or somethin...dot/dps has a bunch of new 19 year olds that are dying to find that leak!!!
     
  10. Storey866

    Storey866 Bobtail Member

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    Jun 3, 2019
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    Press the panel light up button while pressing the odometer reset button for approx 10 seconds to temporarily disable the buzzer. Should turn off until pressure builds up again.
     
  11. x1Heavy

    x1Heavy Road Train Member

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    Mar 5, 2016
    White County, Arkansas
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    No disable.

    Shop time you go.

    DOT OOS ITEM if you do not have it.

    Quit sitting and getting madder and madder until you either chew nails or quit. Go thee to shop for thine air.
     
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