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Air issues

Discussion in 'Ask An Owner Operator' started by JDCUSTOM710kw, May 28, 2020.

  1. May 28, 2020 #1
    JDCUSTOM710kw

    JDCUSTOM710kw Bobtail Member

    2
    0
    Jan 26, 2020
    0
    Hi, I am driving a truck with air issues. The first is the air dryer won't stop leaking, like continuous, not talking about poping off every 10 seconds. I think the air dryer needs rebuilt. The second issue is the air suspension on the drive axles, when loaded it won't air up all the way, the bags do have some air in them. Any ideas on what to do, thanks in advance.
     
    JDCUSTOM710kw, May 28, 2020
    JDCUSTOM710kw, May 28, 2020
    #1
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  3. May 28, 2020 #2
    kemosabi49

    kemosabi49 Trucker Forum STAFF Staff Member

    10,007
    41,470
    Jan 13, 2013
    SW Arkansas
    0
    Air dryers are not expensive. Get a new one then in the future change the desiccant filter every year or so.

    Can you adjust the height on your air bags at the leveling valve? Is the leveling valve even working? Disconnect the rod and find out.
     
    kemosabi49, May 28, 2020
    kemosabi49, May 28, 2020
    #2
  4. May 28, 2020 #3
    baha

    baha Road Train Member

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    Jul 25, 2013
    ga
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    If the air is not getting much over 90lbs the air bags will not fill up all the way?
     
    baha, May 28, 2020
    baha, May 28, 2020
    #3
    magoo68 Thanks this.
  5. May 28, 2020 #4
    Snailexpress

    Snailexpress Road Train Member

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    Apr 28, 2014
    Rocky
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    Should be fill full as under 34,000 load pressure in bags is around 55 PSI
     
    Snailexpress, May 28, 2020
    Snailexpress, May 28, 2020
    #4
  7. May 28, 2020 #5
    magoo68

    magoo68 Road Train Member

    3,393
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    Jun 11, 2011
    st malo mb canada
    0
    Many trucks won’t release air to air bags until tanks are 80 to 90 psi. It’s to preserve air for braking purposes ..
     
    magoo68, May 28, 2020
    magoo68, May 28, 2020
    #5
  8. May 28, 2020 #6
    sjcaliguy

    sjcaliguy Bobtail Member

    4
    1
    May 28, 2020
    0
    Can anyone give advice on why my cab and sleeper airbags keep leaking, pinhole leaks
     
    sjcaliguy, May 28, 2020
    sjcaliguy, May 28, 2020
    #6
  9. May 28, 2020 #7
    danny23tx

    danny23tx Road Train Member

    1,491
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    Feb 16, 2016
    Austin,Tx
    0
    Its probably the pop off valve but it's cheaper to buy a new one than rebuild in most cases . You can by pass it but than risk getting moisture in the lines , it's only recommended to get you to your destination and than a shop .
     
    danny23tx, May 28, 2020
    danny23tx, May 28, 2020
    #7
  10. May 28, 2020 #8
    Ridgeline

    Ridgeline Road Train Member

    20,721
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    Dec 18, 2011
    Michigan
    0
    They wear out.
     
    Ridgeline, May 28, 2020
    Ridgeline, May 28, 2020
    #8
    baha Thanks this.
  11. May 30, 2020 #10
    JDCUSTOM710kw

    JDCUSTOM710kw Bobtail Member

    2
    0
    Jan 26, 2020
    0
    Oh I forgot to add, the tank popet valve is popping off every 30 seconds or so at around 150 psi and the bags have air in them just not full with a load on. Air govenor was replaced about 2000 miles ago.
     
    JDCUSTOM710kw, May 30, 2020
    JDCUSTOM710kw, May 30, 2020
    #10
  12. May 30, 2020 #10
    Espressolane

    Espressolane Road Train Member

    14,841
    84,109
    Nov 21, 2009
    Just south of the north 40
    0
    It is highly probable that your complete air drier is bad. You may also have some clogged air line, most likely from the compressor to air drier. Part of the reason it is essentially over pressuring the system is the unloader control system is not working correctly.

    A new complete air drier unit is around $200.00. They are easy to replace if you have the correct tools. Should take less than an hour to do.
     
    Espressolane, May 30, 2020
    Espressolane, May 30, 2020
    #10
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