Gladhand seal installation direction.. A question

Discussion in 'Experienced Truckers' Advice' started by ncmickey, Aug 26, 2025.

  1. ncmickey

    ncmickey Road Train Member

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    I’ve been driving a truck around 11 years. It’s always a trip when something so easy seems confusing!
    Recently, another driver told me I install hand seals the wrong way. As we know a glad hand seal has a bigger circumference tapered side and a thicker, smaller circumference flat side… I always put the smaller thicker side in and the tapered larger side out.
    This driver told me that he puts the tapered larger side in and the smaller circumference thicker side out.
    Which is the correct way?
    It seems it works either way, I was just curious what others do…
     
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  3. SmallPackage

    SmallPackage Road Train Member

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    99% of all new replacement glad hands have the seal installed the way you do. I have seen a small few of some types installed his way. Much better and more positive seal your way.
     
  4. Bean Jr.

    Bean Jr. Road Train Member

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    You think it's that low? I've never seen a grommet installed the way this driver says the other driver told him to do.
     
  5. mitrucker

    mitrucker Road Train Member

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    I used to do it the way you do until I had a couple bunch up because they fit so loose. Now it do it the way the other driver explained to you. Been driving for 14 yrs now if that matters.
     
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  6. Goodysnap

    Goodysnap Road Train Member

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    There are teflon gladhand seals where the big diameter goes into the gladhand. They don’t function well at all when installed backwards. Impossible to connect as well when they are on both sides. IMG_3784.jpeg IMG_3783.jpeg

    The Teflon does not crack with age like the rubber ones.
     
    Last edited: Aug 26, 2025
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  7. OldeSkool

    OldeSkool Road Train Member

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    Mine always bunch up on my truck. I’m going to try that.
     
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  8. supersnackbar

    supersnackbar Road Train Member

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    When he is driving a nail into a piece of wood, does he drive it in head first?

    I have always put them in like you do, and never had an issue. If I get one where somebody 'adjusted' the little shoulder plate to tight and it wants to bind up, I spit on my gladhand and it slides together (ok, get your dirty minds out of the gutter and up on the curb with mine :p)
     
  9. BoxCarKidd

    BoxCarKidd Road Train Member

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    I do not have a picture of one but some have a much smaller diameter on the glad hand to glad hand side. They work OK but I prefer the original design.
     
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  10. Coolbreezin

    Coolbreezin Medium Load Member

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    Florida
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    1) Ive purchased gladhands with the grommet installed already. The larger half of the rubber was on the outside. It came from the factory that way so I just accept it as fact.
    2) put a little vasoline on the grommets when they arent being used.
    my 2¢.
     
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