Trailer air bags over-inflated

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by wjhuskey, Oct 14, 2020.

  1. wjhuskey

    wjhuskey Bobtail Member

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    Nov 1, 2014
    Arkansas
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    Hopefully I'm posting this in the right area. If not, I apologize.
    I made a 30 mile haul with my Timpte Hopper Bottom trailer this morning. Got back to the farm, got out and the air bags on the trailer were twice as tall as they normally are. Over-inflated. Where do I need to start on fixing this? Thanks in advance.
     
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  3. AModelCat

    AModelCat Road Train Member

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    Leveling valve is where I'd start.
     
  4. magoo68

    magoo68 Road Train Member

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    st malo mb canada
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    I had same issue at a dock I backed down into . The levelling valve flipped over and inflated bags to max pressure. Be careful I would dump air on trailer and see if it releases air then take apart levelling valve rod and reposition it correctly if it flipped.
     
  5. wjhuskey

    wjhuskey Bobtail Member

    14
    2
    Nov 1, 2014
    Arkansas
    0
    What do I need to do with it...adjust up or down or something?
     
  6. wjhuskey

    wjhuskey Bobtail Member

    14
    2
    Nov 1, 2014
    Arkansas
    0
    Ok will do, thanks. I went into a different grain dumping pit than I've ever been to at this elevator. It wasn't very level and that could be what did it.
     
  7. Goodysnap

    Goodysnap Road Train Member

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    Check the exhaust port on the leveling valve for plugged. Inspects can build nests. Especially in seasonal use applications
     
    spsauerland Thanks this.
  8. SmallPackage

    SmallPackage Road Train Member

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    Marion Texas
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    Seen this happen when one axle gets parked in a hole. More common with empty light weight hoppers or tanks. It causes the bag to over extend and it makes it difficult to deflate it and in turn the others inflate to match it instead of them deflating back to normal. You have to pull the main air feed line off and let them deflate all the way down. Make sure they do not fold up abnormally. Than let them air back up and re check the leveling valve adjustment and spring system for leaks.
     
  9. wjhuskey

    wjhuskey Bobtail Member

    14
    2
    Nov 1, 2014
    Arkansas
    0
    Update: I dumped the trailer air 3 different times and it fixed it. Thanks everyone.
     
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