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Air leaking out of this connector even after replaced.

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Shotgun94, Apr 25, 2019.

Page 3 of 3
  1. Apr 28, 2019 #21
    Shotgun94

    Shotgun94 Medium Load Member

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    I think it is my dash valve. I hear air from it.
     
    Shotgun94, Apr 28, 2019
    Shotgun94, Apr 28, 2019
    #21
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  3. Apr 28, 2019 #22
    Hammer166

    Hammer166 Crusty Information Officer

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    I'm with some of the others. You have a bad brake can. It's not the diaphragm blown, but rather a leak internally between the two chambers. I, like you, had a hell of a time trying to figure out what was going on.

    Try this test. Charge the trailer line (push in the red knob,) and pull the blue gladhand. I bet if you hold your thumb on it you'll feel it build pressure. The easiest way to find it is the crimp the line to each can individually to figure out which one is leaking.
     
    Hammer166, Apr 28, 2019
    Hammer166, Apr 28, 2019
    #22
    BoxCarKidd and Shotgun94 Thank this.
  4. Apr 28, 2019 #23
    Shotgun94

    Shotgun94 Medium Load Member

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    I'm about to find out. Im at a TA.
    The trailer is a rental so they said probably thr chamber. I'll let you guys know.
     
    Shotgun94, Apr 28, 2019
    Shotgun94, Apr 28, 2019
    #23
  5. Apr 28, 2019 #24
    Hammer166

    Hammer166 Crusty Information Officer

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    You're a brave soul. I wouldn't trust most TA shops beyond verifying there were actually brake chambers on the trailer, and I'd still probably go look myself to verify. j/s
     
    Hammer166, Apr 28, 2019
    Hammer166, Apr 28, 2019
    #24
    HoneyBadger67 Thanks this.
  7. Apr 30, 2019 #25
    Shotgun94

    Shotgun94 Medium Load Member

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    Well update, TA found nothing wrong with the trailer. They found the dash leaking air. So I changed it out myself but still same issue.
    Maybe it is my trailer and TA didn't find it.
     
    Shotgun94, Apr 30, 2019
    Shotgun94, Apr 30, 2019
    #25
  8. Apr 30, 2019 #26
    BoxCarKidd

    BoxCarKidd Road Train Member

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    Maybe sometime you will check that?
     
    BoxCarKidd, Apr 30, 2019
    BoxCarKidd, Apr 30, 2019
    #26
    Hammer166 Thanks this.
  9. May 1, 2019 #27
    Mr Bob

    Mr Bob Light Load Member

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    Please stop throwing money at it and perform the suggested tests that have been posted. There have been very good suggested tests that will solve your problem if you would take a few minutes to check and let others do the head scratching for you.
     
    Mr Bob, May 1, 2019
    Mr Bob, May 1, 2019
    #27
    Hammer166 and BoxCarKidd Thank this.
  10. May 10, 2019 #28
    Shotgun94

    Shotgun94 Medium Load Member

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    Problem has been fixed. Sorry on the late response but I wanted to make sure it was right b4 I posted.
    So what happened. When I would set the trailer brakes and remove the red hose air is supposed to come out of that hose, the emergency line. Well air would come back out of the trailer. I know very very odd. The issue was a valve. Here are some images.

    Now no air is lingering on the trailer brake when I release it. I mailed back park brake valve to velocity freightliner and hopefully they will send me a check back as I called them b4 i mailed it. Hope this helps
     

    Attached Files:

    Shotgun94, May 10, 2019
    Shotgun94, May 10, 2019
    #28
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