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Air compressor runs alot

Discussion in 'Trucks [ Eighteen Wheelers ]' started by drewfarmsllc, Feb 18, 2023.

  1. Feb 18, 2023 #1
    drewfarmsllc

    drewfarmsllc Light Load Member

    83
    32
    Oct 18, 2008
    South Carolina
    0
    2020 T680,X15 and auto trans. Seems like the air compressor comes on a lot. We have checked for air leaks and can't find anything. When I go to the truck in the morning I still have most of the air pressure but going down the road it will come on and I have not pressed the brakes or used air at all. Does the automatic transmission use a lot of air to shift?? Anyone have an idea
     
    drewfarmsllc, Feb 18, 2023
    drewfarmsllc, Feb 18, 2023
    #1
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  3. Feb 18, 2023 #2
    AModelCat

    AModelCat Road Train Member

    29,418
    161,681
    Jul 7, 2015
    Canuckistan
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    Fan clutch or possibly a turbo actuator can leak and you would never hear it over the engine noise.
     
    AModelCat, Feb 18, 2023
    AModelCat, Feb 18, 2023
    #2
    Bean Jr. and Magoo1968 Thank this.
  4. Feb 18, 2023 #3
    loudtom

    loudtom Road Train Member

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    Aug 26, 2016
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    Could also be brake chamber or lines. Chock the wheels and release the parking brake, then go spray the brake chambers and lines.
     
    loudtom, Feb 18, 2023
    loudtom, Feb 18, 2023
    #3
  5. Feb 18, 2023 #4
    BoxCarKidd

    BoxCarKidd Road Train Member

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    Aug 26, 2014
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    What is the pressure on your primary and secondary gauges when the compressor cuts back on?
     
    BoxCarKidd, Feb 18, 2023
    BoxCarKidd, Feb 18, 2023
    #4
  7. Feb 19, 2023 #5
    Magoo1968

    Magoo1968 Road Train Member

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    5,466
    Mar 18, 2021
    St Malo mb
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    Signal line from air tank to compressor has a slow leak is my guess .. does gauge actually drop 20 psi or so when compressor cycles ?? If not check out signal line.
     
    Magoo1968, Feb 19, 2023
    Magoo1968, Feb 19, 2023
    #5
  8. Feb 19, 2023 #6
    howard7

    howard7 Bobtail Member

    10
    10
    Sep 15, 2022
    0
    If you are only losing air from the supply reservoir “wet tank”, it can also be the unloader pistons in the air compressor, the delivery check valve in the air dryer, or the purge valve in the air dryer.
     
    howard7, Feb 19, 2023
    howard7, Feb 19, 2023
    #6
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