Proper ride height for KW T680

Discussion in 'Kenworth Forum' started by Auctioneer, Jan 1, 2018.

  1. Auctioneer

    Auctioneer Light Load Member

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    May 7, 2010
    Trenton, NC
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    I have a 2015 Kenworth T680, I recently replace the leveling valve on the rear axle. Can someone tell me the proper method of checking the ride height and what the ride height should be. (Per Kenworth specs.) I am running factory installed super single tires, if that makes any different.
    Thank you in advance for your help.
    Auctioneer.
     
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  3. spsauerland

    spsauerland Road Train Member

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    West Harrison, In
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    Which suspension? AG400 is 9" aka 8 bag. AG380 is 8.5" loaded 8.625" unloaded aka Pete flex air/elliptical spring. AG400l is 8.5" loaded, 8.75" unloaded aka Pete Low air leaf. Measure height on level ground. First measure centered between tandems from bottom of frame to ground. Then measure from rear axle, center of axle shaft(tapered hole in center) to ground. Difference is ride height. Can call a dealership and look up ride height in ECAT under description frame height or post last six here I will look it up if unsure which suspension you have.
     
  4. Auctioneer

    Auctioneer Light Load Member

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    May 7, 2010
    Trenton, NC
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    I checked my suspension out. It has 4 airbags, the spring connects to the chassis in front of the axle, swings up and over the axle, then down behind the axle and terminates under the airbag.
    Which suspension system is this?
     
  5. Auctioneer

    Auctioneer Light Load Member

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    May 7, 2010
    Trenton, NC
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    Last six: 426435.
    This is of course the most b sure way.
    Thank you
     
  6. Auctioneer

    Auctioneer Light Load Member

    72
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    May 7, 2010
    Trenton, NC
    0
    Last Six: 426435.
    This is the most sure way to find out.
    Thank you.
     
  7. spsauerland

    spsauerland Road Train Member

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    West Harrison, In
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    8.75" unloaded. It is a AG400L.
     
    Auctioneer Thanks this.
  8. Auctioneer

    Auctioneer Light Load Member

    72
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    May 7, 2010
    Trenton, NC
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    Thank you. It's great that you take time to help folks.
     
    spsauerland Thanks this.
  9. spsauerland

    spsauerland Road Train Member

    4,296
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    May 31, 2010
    West Harrison, In
    0
    No problem. This forum is about sharing information and helping each other out. We can all learn from each other!
     
  10. Mr.Mongo

    Mr.Mongo Bobtail Member

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    Oct 4, 2018
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    By unloaded, do you mean bobtail?
     
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