Air compressor problem.

Discussion in 'Trucks [ Eighteen Wheelers ]' started by skman, Jan 13, 2018.

  1. skman

    skman Light Load Member

    167
    53
    Aug 26, 2013
    Saskatchewan
    0
    I have a weird problem. My compressor is trying to build air but it is making popping sounds and not filling my tanks.
    A couple weeks ago...I had a couple mornings where I'd start the truck and it would build air fine. Then I'd hook up trailer and try air it up and it wouldn't build air. Then it would start building slowly and be fine the rest of the day.
    I changed the governor and everything was good for a week.
    But today I was driving down the road and i heard an intermittent sputtering sound.
    Noticed it was coming from compressor area and now it won't build air pressure to my tanks and is sputtering almost constantly.
    Any help for me? I'm thinking unloader?
     
  2. spsauerland

    spsauerland Road Train Member

    1,436
    3,198
    May 31, 2010
    West Harrison, In
    0
    Frozen discharge hose off compressor? Make sure it slops all the way to air dryer. Popping possibly the safety valve to stop overpressuring the system. If it trips a lot it gets wore out in a hurry.
     
    SAR and skman Thank this.
  3. skman

    skman Light Load Member

    167
    53
    Aug 26, 2013
    Saskatchewan
    0
    Thanks....I'll check that out. Its about -30C with the wind here today so something being frozen is a definite possibility.
     
  4. Heavyd

    Heavyd Road Train Member

    6,144
    3,819
    Feb 4, 2009
    0
    Yep, froze air dryer.
     
    Justrucking2 Thanks this.
  5. skman

    skman Light Load Member

    167
    53
    Aug 26, 2013
    Saskatchewan
    0
    I'm starting to think that might be it. I had an air leak that I had a hard time locating. I just found it...ended up being under the insulation on an air actuated valve on my tanker. It was causing my air to drain fast enough that my compressor was kicking in fairly often.
    My air dryer was on my list of things to change anyway since it's a couple years old. Guess I'll give that a shot...and make sure there's no ice in the line to the compressor at the same time.
     
    Heavyd Thanks this.
  6. Heavyd

    Heavyd Road Train Member

    6,144
    3,819
    Feb 4, 2009
    0
    Do you know what model of air dryer you have? Many just have spin on cartridges.
     
    SAR Thanks this.
  7. skman

    skman Light Load Member

    167
    53
    Aug 26, 2013
    Saskatchewan
    0
    Its an AD9 I believe. You need to pull the can off to get to the cartridge. Figured I'd just change the whole thing and get a new purge valve at the same time
     
  8. Heavyd

    Heavyd Road Train Member

    6,144
    3,819
    Feb 4, 2009
    0
    Right, with AD9, it actually better and sometimes cheaper just to install a complete reman unit.
     
    SAR Thanks this.
  9. spsauerland

    spsauerland Road Train Member

    1,436
    3,198
    May 31, 2010
    West Harrison, In
    0
    Agree on re-man. You get a new heater element this way too. I would stick to re-man from reputable company ie genuine bendix or haldex. Stay away from cheap overseas ones. Little air brake antifreeze should "thaw" discharge hoses.
     
    SAR and skman Thank this.
  10. xsetra

    xsetra Road Train Member

    2,974
    2,580
    Aug 21, 2011
    0
    Replaced my AD9 last weekend. Complete reman was $119.00
    Replacement cartridge was $39.00
    I replaced whole unit. I think it was quicker than just changing cartridge.
     
    SAR and Heavyd Thank this.
  • Draft saved Draft deleted