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How many leveling valves on a spread?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by SpeedRacer, Dec 6, 2011.

  1. Dec 6, 2011 #1
    SpeedRacer

    SpeedRacer Light Load Member

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    Dec 4, 2007
    Tifton, Ga
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    How many leveling valves are typically on a spread axle trailer, one on each axle or just the rear?

    I bought a special built Great Dane van with two sliders that'll work as tandem or spread, but it only has one leveler on the rear axle. I was told that was ok. Dump valves for each axle, btw.
     
    SpeedRacer, Dec 6, 2011
    SpeedRacer, Dec 6, 2011
    #1
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  3. Dec 6, 2011 #2
    rbht

    rbht Heavy Load Member

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    Most air ride trailers only have one leveling valve. I've owned quite a few and thats all there has ever bin, one on the rear axel.
     
    rbht, Dec 6, 2011
    rbht, Dec 6, 2011
    #2
  4. Dec 6, 2011 #3
    pullingtrucker

    pullingtrucker Road Train Member

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    Usually there is only one valve per trailer. But a few guys have been known to run one per axle. The problem with running one per axle is that getting the axles to hold equal weight and same suspension height.
     
    pullingtrucker, Dec 6, 2011
    pullingtrucker, Dec 6, 2011
    #3
  5. Dec 6, 2011 #4
    Pablo-UA

    Pablo-UA Road Train Member

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    Borispol, Ukraine
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    usually one only. but on some trailer with TCE/ECAS two valves and two sensors were used. One for left one for right side. I saw Kogel with two valve ECAS last week. They used this system to decrease sway and prevent roll over risk.

    But they are rare, really rare, so over 90% of trailers got one leveling valve only. one for all axes.
     
    Pablo-UA, Dec 6, 2011
    Pablo-UA, Dec 6, 2011
    #4
  7. Dec 6, 2011 #5
    SpeedRacer

    SpeedRacer Light Load Member

    143
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    Dec 4, 2007
    Tifton, Ga
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    Thanks, that at least puts my mind at ease. At some point, someone that's worked on this trailer seemed to halfa$$ the repairs. I wanted to be sure.

    It's was a custom built 98 trailer, it's fairly unusual. Alum floor, SS nose and rear doors, Trucklite LED's all around, 24.5 alum wheels, dump valves and it came with a fixed front axle and sliding rear, but someone has converted the front to slide as well. It also has some backup lights in the middle holes on the tail lights, not sure how they're wired yet.
     
    SpeedRacer, Dec 6, 2011
    SpeedRacer, Dec 6, 2011
    #5
  8. Dec 6, 2011 #6
    blanco

    blanco Road Train Member

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    Gwinnett County, GA
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    pics would be great.. I'd like to see a front and rear axle sliding...
     
    blanco, Dec 6, 2011
    blanco, Dec 6, 2011
    #6
  9. Dec 6, 2011 #7
    Flightline

    Flightline Road Train Member

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    Leveling valves on both axles would lead to weight distubution problems, especially if grossing 80,000
    I've never seen it and not sure one could get it to work well. But there are alot of smart people out there. Like the dual steer axles on the milatary trucks.
    I also would like to see pictures, please.
     
    Flightline, Dec 6, 2011
    Flightline, Dec 6, 2011
    #7
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