Air pressure problem

Discussion in 'Mack Forum' started by Jhuls41, Feb 28, 2016.

  1. Jhuls41

    Jhuls41 Bobtail Member

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    Feb 16, 2016
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    I am having trouble with an 07 with the 427 asset. It will not build past 40 psi and it's slow to get to that. I also put a new reman compressor on last November but realize it could have an issue already. No air leaks at all. Interested in people thoughts thanks. Drier isn't bad bypassed it still the same issue.
     
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  3. pigeon river trucking

    pigeon river trucking Light Load Member

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    Jan 1, 2016
    michigan
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    Sounds like it could be air governor
     
  4. dgc

    dgc Light Load Member

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    Dec 2, 2012
    miami, fl
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    Yup sound like the air governor
     
  5. Jhuls41

    Jhuls41 Bobtail Member

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    Feb 16, 2016
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    Replaced governor still same Problem
     
  6. dgc

    dgc Light Load Member

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    Dec 2, 2012
    miami, fl
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    When you replaced the compressor you had to switch everything over, the compressor should also have a pop off valve, Have you checked it to make sure its working properly?
     
  7. RustyBolt

    RustyBolt Road Train Member

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    Feb 21, 2015
    Bement, IL
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    Soap, water, spray bottle. Start spraying.
     
  8. AModelCat

    AModelCat Road Train Member

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    Canuckistan
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    Could be the check valves or unloader piston sticking.
     
  9. ryanbob1

    ryanbob1 Light Load Member

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    Sep 9, 2016
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    try changing the 4 way protection valve this is most likely your problem looks some what like this down below
    disconnect the little line going from the drier back to the compressor that turns the compressor on and off
    try squirting a little CRC in the intake of the compressor while running 56251-Supply-Truck-Brakes-4-Way-Circuit-Protection-Valve-1.jpg
     
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