Air compressor ticking sound

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Cajuncowboy654, Jan 6, 2021.

  1. Cajuncowboy654

    Cajuncowboy654 Light Load Member

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    Jun 4, 2019
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    I recently changed the governor and the 1/4" line from the governor to the compressor, now i notice an air leak with a ticking when the pressure gets into range to have the compressor start pumping again.


    Anyone know what this could be?
     
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  3. 201

    201 Road Train Member

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    Not your air dryer ticking, is it?
     
  4. Cajuncowboy654

    Cajuncowboy654 Light Load Member

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    I was able to catch it today. Its coming from the purge valve.

    When it gets to around 100 psi and starting to compress air again it will start sputtering air from the purge. Is it the purge valve that's bad, or unloader maybe??
     
  5. tj379

    tj379 Light Load Member

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    do u mean u replaced the quarter inch air line from governer to dryer?, if your building air as normal at 100 psi i would believe your unloders are ok, i would ceck your check valve in dryer
     
  6. Cajuncowboy654

    Cajuncowboy654 Light Load Member

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    No I replaced the quarter inch line that comes off the compressor to the governor on the dryer.

    When the air gets down around 100 is when it happens, it expels aire from the purge valve with a pulse to it.

    When it gets over 120 psi it purges as normal.
     
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  7. pup

    pup Light Load Member

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    If the problem started right after the governor change I'd look there. Be sure you didn't plug the exhaust port on the governor.
     
    tj379 Thanks this.
  8. tj379

    tj379 Light Load Member

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    ahhhh got ya! i was assuming ur govener was compressor mounted, obviously it is not, im not real familiar with that newer style of dryer but same principle should apply, your compressor and unloaders are working correctly, your signal line is new, so nuthin left but dryer and or check valve in dryer, i would just replace it as a whole but i believe those can be pricey compared to a ad-9 as im used to
     
    650cat425 Thanks this.
  9. Cajuncowboy654

    Cajuncowboy654 Light Load Member

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    I wouldn't say it started after. It just got worse.

    It would do it intermittently before now it does it every time.

    I mounted the new governor exactly like the old one. Just plugged what was plugged and left open what was left open.
     
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