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Air brake issue

Discussion in 'Questions From New Drivers' started by Chebbydriver7195, Mar 30, 2019.

Page 1 of 6
  1. Mar 30, 2019 #1
    Chebbydriver7195

    Chebbydriver7195 Light Load Member

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    Feb 24, 2019
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    So after my last incident I have begun doing a very rigid by the book pre trip. Taking 30 minutes on duty every morning to do it right.

    Well today I hooked up to a trailer, did my walk around and a honest pretrip+air brake test. No real issue, minor air loss like 2 psi guage barely moved in 1 minute. Now I've been parked and cant keep air without truck running.
    I KNOW it's in the trailer, but cant find where.It sounds like it's from somewhere on the passenger side near the tandems.
    I've got experience working on equipment but not air brakes.
    Suddenly after 200miles I have an issue out of no where. Anyone got advice on what to look for?
    Very hot load delivers the 1st and I've got 400miles to go.
     
    Chebbydriver7195, Mar 30, 2019
    Chebbydriver7195, Mar 30, 2019
    #1
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  3. Mar 30, 2019 #2
    TripleSix

    TripleSix God of Roads

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    Do you have a trolley valve? I am assuming that you don’t have an air leak when the red valve is pulled out. Odds are it’s one of your brake chambers on the trailer.
     
    TripleSix, Mar 30, 2019
    TripleSix, Mar 30, 2019
    #2
    Suspect Zero and Bean Jr. Thank this.
  4. Mar 30, 2019 #3
    WesternPlains

    WesternPlains Road Train Member

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    Look for a TA. Walk inside. Point at trailer. Say: Fix.
     
    WesternPlains, Mar 30, 2019
    WesternPlains, Mar 30, 2019
    #3
    peterd, TankerP, Lumper Humper and 3 others Thank this.
  5. Mar 30, 2019 #4
    Chebbydriver7195

    Chebbydriver7195 Light Load Member

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    Feb 24, 2019
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    Yes to the trolley valve. I left the parking brake set and pushed red knob in. Bad air leak. Push yellow knob in and pull red knob out no air leak.

    Trolley valve down =rushing air sound under tandems. Hard to track because of noisy parking lot. There's a boss shop nearby I'll go to in the morning.
     
    Chebbydriver7195, Mar 30, 2019
    Chebbydriver7195, Mar 30, 2019
    #4
  7. Mar 30, 2019 #5
    Ridgeline

    Ridgeline Road Train Member

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    It don't matter what the load it, get it fixed or have them replace the trailer.
     
    Ridgeline, Mar 30, 2019
    Ridgeline, Mar 30, 2019
    #5
    Bean Jr., magoo68, Tb0n3 and 1 other person Thank this.
  8. Mar 30, 2019 #6
    Ironwindow

    Ironwindow Light Load Member

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    Mar 1, 2019
    Winston Salem, NC
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    Got an air line leaking in the trailer some where. Quiet possibly have an air tank drain valve open.

    Its not a brake chamber or brake hose, they'd only leak when pedal was pressed.

    Maybe a bad relay valve.
     
    Ironwindow, Mar 30, 2019
    Ironwindow, Mar 30, 2019
    #6
    tank4life Thanks this.
  9. Mar 30, 2019 #7
    Tombstone69

    Tombstone69 Road Train Member

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    I'm not advocating you do this, whenever I was in the middle of a delivery and a brake can started leaking, I would remove the airline and stick a dime inbetween the fitting and the line stopping air from going to said can till I could get a new can and fix it. Definitely Old skool.
     
    Tombstone69, Mar 30, 2019
    Tombstone69, Mar 30, 2019
    #7
    Suspect Zero, Lepton1, TripleSix and 2 others Thank this.
  10. Mar 30, 2019 #8
    truckdriver31

    truckdriver31 Road Train Member

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    lets see how smart people are. when doing a brake down test. which knob is suppose to pop out first
     
    truckdriver31, Mar 30, 2019
    truckdriver31, Mar 30, 2019
    #8
  11. Mar 30, 2019 #9
    x1Heavy

    x1Heavy Road Train Member

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    White County, Arkansas
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    The tractor protection valve. Yellow first. Forget the trailer, it's gone. That pops later.
     
    x1Heavy, Mar 30, 2019
    x1Heavy, Mar 30, 2019
    #9
  12. Mar 30, 2019 #10
    Tombstone69

    Tombstone69 Road Train Member

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    They both pop at the same time.
     
    Tombstone69, Mar 30, 2019
    Tombstone69, Mar 30, 2019
    #10
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