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Cat c15 not building air.

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by anthonyar4, Jul 7, 2020.

  1. Jul 7, 2020 #1
    anthonyar4

    anthonyar4 Medium Load Member

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    Went down the highway and my warnings came on brakes locked up no air whatsoever. Looked for leak no cut lines. Took off air compressors outlet and it was blowing inconsistent. The guy at the cat shop said it should
    Blow my hand off of it. He said bad air compressor. Any tips? Will not build any air whatsoever
     
    anthonyar4, Jul 7, 2020
    anthonyar4, Jul 7, 2020
    #1
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  3. Jul 7, 2020 #2
    bad-luck

    bad-luck Road Train Member

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    If you don't her any audible leaks, and you took the metal braided line off of the back of the air compressor. And it is not blowing any air, inconsistent air, or if you can hold your thumb over the port you need a new compressor
     
    bad-luck, Jul 7, 2020
    bad-luck, Jul 7, 2020
    #2
    Shawn2130 Thanks this.
  4. Jul 7, 2020 #3
    AModelCat

    AModelCat Road Train Member

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    I'd pull the unloader valve in the head and inspect before replacing compressor. Seen them gum up and stick.
     
    AModelCat, Jul 7, 2020
    AModelCat, Jul 7, 2020
    #3
    pushbroom, lester, beastr123 and 2 others Thank this.
  5. Jul 7, 2020 #4
    Superhauler

    Superhauler TEACHER OF MEN

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    That or simply the air gov went bad.
     
    Superhauler, Jul 7, 2020
    Superhauler, Jul 7, 2020
    #4
    lester, beastr123, BoxCarKidd and 2 others Thank this.
  7. Jul 8, 2020 #5
    anthonyar4

    anthonyar4 Medium Load Member

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    They are manually applying air and it won’t build air. I loser valve?
     
    anthonyar4, Jul 8, 2020
    anthonyar4, Jul 8, 2020
    #5
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