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Trailer auto inflation system question

Discussion in 'Experienced Truckers' Advice' started by Commuter69, Jul 29, 2020.

Page 3 of 3
  1. Jul 30, 2020 #21
    FerrissWheel

    FerrissWheel Road Train Member

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    Meritor does.
     
    FerrissWheel, Jul 30, 2020
    FerrissWheel, Jul 30, 2020
    #21
    062 Thanks this.
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  3. Jul 30, 2020 #22
    062

    062 Road Train Member

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    Hendrickson uses a regulator in the control box. They have a complete manual on their website.
     
    062, Jul 30, 2020
    062, Jul 30, 2020
    #22
    striker and FerrissWheel Thank this.
  4. Jul 30, 2020 #23
    xsetra

    xsetra Road Train Member

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    The O-rings in the valve extension hoses are easily damaged during tire changes. You have to be gentle when reconnecting the hoses to the "T" in the hub.
    I carry a few spares.

    Also sometimes a tire tech will turn the center "T" counterclockwise to get hoses to reach, that could allow air to escape. Sometimes the tension of the hoses can turn the "T" with the same result.

    Spray with soap water to find leak.
    As mentioned it could be your tank or system that leaks, not the tires.

    Good luck
     
    xsetra, Jul 30, 2020
    xsetra, Jul 30, 2020
    #23
    Dino soar, FerrissWheel and gentleroger Thank this.
  5. Jul 30, 2020 #24
    Commuter69

    Commuter69 Road Train Member

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    I know you didn't mean this, but you said it and it reminded me of this picture. Needed a laugh....
     
    Commuter69, Jul 30, 2020
    Commuter69, Jul 30, 2020
    #24
    snowwy Thanks this.
  7. Jul 30, 2020 #25
    Commuter69

    Commuter69 Road Train Member

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    Update: had it looked at a little bit ago, found that the hose for the INSIDE tires that were replaced were not completely tightened. I knew it was something STOOPID! I just couldn't hear it or see it directly....
     
    Commuter69, Jul 30, 2020
    Commuter69, Jul 30, 2020
    #25
    xsetra and FerrissWheel Thank this.
  8. Aug 1, 2020 #26
    striker

    striker Road Train Member

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    Most likely you have either an inflator hose that is not installed correctly/cross threaded and it's leaking, or possibly an internal air leak within the wheel hub assembly. Our 3 axle container chassis have auto inflators, inside the hub is a "stator" assembly and they randomly will start to leak, sometimes you can hear them, sometimes you can't. Improperly installed inflator hoses is incredibly common.
     
    striker, Aug 1, 2020
    striker, Aug 1, 2020
    #26
  9. Aug 1, 2020 #27
    striker

    striker Road Train Member

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    Some of the systems will have a built-in regulator, usually a it's a giant screw knob you can adjust it one way or another, other systems may have the regulator installed inside the box with the shut-off. Our tri-axles came unregulated and would inflate to 140 psi (where the gov. on our tractors were set), company took it apart and installed a regulator on it and set it 100 psi. Back when the UPRR had inflation systems on UP 53' chassis, not uncommon to find one set to 125 PSI or 60 PSI. We had a tire blow out, when the tire guy was servicing it on the side of the road, he checked the PSI system and found it was inflating tires to 125 PSI. He adjusted it back to 100 PSI and deflated each tire to 80 PSI before he turned it back on.
     
    striker, Aug 1, 2020
    striker, Aug 1, 2020
    #27
  10. Aug 1, 2020 #28
    Commuter69

    Commuter69 Road Train Member

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    UPDATE #2.....

    First place didn't find the WHOLE problem..... stopped at another place (different issue) and had them look at it....

    Turns out that the shop should have replaced the $&$%#%#/$_$ valve stems! I thought that was standard procedure whenever a tire is replaced for any reason?

    What ended up happening was that since he wasn't 100% certain that he got the entire problem and didn't know much about how to properly diagnose and repair the issues, he removed the hoses completely and turned the system OFF.

    That said, my thinking is the next step is to take it to a trailer shop, rule out an actual puncture in each tire, replace all hoses and valve stems.. that should resolve the problem, right?
     
    Last edited: Aug 2, 2020
    Commuter69, Aug 1, 2020
    Commuter69, Aug 1, 2020
    #28
  11. Jan 21, 2025 #29
    Da G

    Da G Bobtail Member

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    Da G, Jan 21, 2025
    Da G, Jan 21, 2025
    #29
  12. Jan 21, 2025 #30
    Da G

    Da G Bobtail Member

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    What size is the oring that is needed?
     
    Da G, Jan 21, 2025
    Da G, Jan 21, 2025
    #30
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