Air pressure not building up

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by BlackKw900, Feb 28, 2021.

  1. BlackKw900

    BlackKw900 Bobtail Member

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    Feb 12, 2021
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    Ah I see, I took the inlet line from the air dyer and it seem to have are flow up to that point.
     
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  3. bad-luck

    bad-luck Road Train Member

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    It wouldn't be going through the air governor. I don't know what the maximum the compressor could produce.
     
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  4. Deere hunter

    Deere hunter Road Train Member

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    You’re getting there!
     
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  5. Deere hunter

    Deere hunter Road Train Member

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    Did you ever get that air problem figured out?
     
  6. BlackKw900

    BlackKw900 Bobtail Member

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    Hey Deere hunter, still working on it already replace the air dryer and check the valve that you told me and still doing the same thing, at this point I have no idea what else could be the problem
     
  7. Deere hunter

    Deere hunter Road Train Member

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    OK just curious what did you find?
     
  8. kwcam

    kwcam Light Load Member

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    try a #10 union and bypass the air dryer, simple test to try. also where the steel braid hose ends and wire braid hose starts, spray that hose with soapy solution and check for leaks/bubbles. known to leak bad were it is above trans area.
     
  9. mixingconcrete

    mixingconcrete Light Load Member

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    I once had a problem with the air hose itself, the house rubbed on something under the cab and was leaking. I couldnt hear it when the truck was running and it basicly wouldnt build air because most of the air was coming out of the hose and not enough pressure went into the dryer. I had to take the hose off and give pressure to it from the shop air compressor to find the leak while doing all this in a quite area to hear if it leaks.
     
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