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07 freightliner Columbia 14.0 liter air dryer cycling every 45 seconds

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Hulld, Oct 12, 2017.

Page 1 of 2
  1. Oct 12, 2017 #1
    Hulld

    Hulld Road Train Member

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    Upstate NY
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    pulled in to get fuel yesterday and came out and started truck but wouldn't build any air pressure?
    I limped it in to a parking spot to check it out.
    After messing with it for a while all of sudden it started building air pressure?
    Now after that the air dryer is cycling about e every 45 seconds or so?
    The compressor builds air pressure till the dryer pops off then then the dryer continues to hiss air out and you can watch the dash gauges slowly drop then the air dryer stops hissing and the compressor builds air again and the process starts all over again.
    Anyone have any ideas?
     
    Hulld, Oct 12, 2017
    Hulld, Oct 12, 2017
    #1
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  3. Oct 12, 2017 #2
    Muddydog79

    Muddydog79 Heavy Load Member

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    Pop off valve on the bottom of the dryer is sticking. Some time you can lightly tap it with a hammer to free it up but i would replace the valve. Careful not to hit it too hard cuz it will break, from experience.
     
    Muddydog79, Oct 12, 2017
    Muddydog79, Oct 12, 2017
    #2
  4. Oct 12, 2017 #3
    Hulld

    Hulld Road Train Member

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    I have been taping on it but dosent seem to help at all.
    Air dryer replacement maybe?
     
    Hulld, Oct 12, 2017
    Hulld, Oct 12, 2017
    #3
  5. Oct 12, 2017 #4
    Muddydog79

    Muddydog79 Heavy Load Member

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    You can but the valve it self. Would be alot cheaper, easier to replace.
     
    Muddydog79, Oct 12, 2017
    Muddydog79, Oct 12, 2017
    #4
  7. Oct 12, 2017 #5
    Muddydog79

    Muddydog79 Heavy Load Member

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    Buy not but
     
    Muddydog79, Oct 12, 2017
    Muddydog79, Oct 12, 2017
    #5
  8. Oct 13, 2017 #6
    Hulld

    Hulld Road Train Member

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    Upstate NY
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    Changed the air dryer assembly and the problem is now solved.
    Bought it at fleet pride and did it myself.
    516.00 not the cheapest way out but I'm 1400 miles from home and didn't want any further issues.
     
    Hulld, Oct 13, 2017
    Hulld, Oct 13, 2017
    #6
  9. Oct 13, 2017 #7
    Muddydog79

    Muddydog79 Heavy Load Member

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    Dang thats high. I think i paid around 280$ for my air dryer at about 10 months ago. Glad u got it fixed though.
     
    Muddydog79, Oct 13, 2017
    Muddydog79, Oct 13, 2017
    #7
  10. Oct 13, 2017 #8
    Muddydog79

    Muddydog79 Heavy Load Member

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    At truckpro
     
    Muddydog79, Oct 13, 2017
    Muddydog79, Oct 13, 2017
    #8
  11. Oct 13, 2017 #9
    boneebone

    boneebone Road Train Member

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    For a $65 rebuild kit and a pair of snap ring pliers you could've saved yourself $451.

    A cycling air dryer is more annoying then harmful, (as in breaking down on you.)
     
    boneebone, Oct 13, 2017
    boneebone, Oct 13, 2017
    #9
  12. Oct 13, 2017 #10
    lilillill

    lilillill Sarcasm... it's not just for breakfast

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    Wow... I think both of you got took. I got a Meritor clone for my ‘07 Columbia from Truckpro for $187... the kind with the spin-on cartridge.
     
    lilillill, Oct 13, 2017
    lilillill, Oct 13, 2017
    #10
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