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High-lift tailgate - anyone make their own?

Discussion in 'Trucks' started by Ronsii, Jun 25, 2018.

  1. Ronsii

    Ronsii Senior Member

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    Occupation:
    s/e Heavy equipment operator
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    Western Washington
    So we've decided the old 75' KW needs a high lift gate for when we haul brush and other stuff that can get stuck up when getting dumped... I was wondering if anyone here has made their own from scratch or is there a kit you have used??? or any other thoughts I should consider before starting in on this :)

    dumptruck-sideback.jpg
     
  2. JPV

    JPV Senior Member

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    Aug 20, 2015
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    751
    Location:
    S.W. Washington
    Who built the box? If it is a Truck Weld there is a good chance they would have what you need to put one on, I believe they are at the old Washington Truck Rebuilders shop at the Vader exit now. I have never dealt with them them though. There are a few ways to do it, simplest is to have the cylinders on the side of the box but doesn't look as good and they are in harms way. The best way is to hide the cylinder under the lift arms. If you can find one to look at for measurements and cylinder geometry that would be helpful. If done right your tailgate should pin right on. The other thing to decide is if you want to use air cylinders or hydraulic. If you go hydraulic you have to plumb in a diverter valve or add a spool to your dump valve. Either way it is smart to build in some kind of lockout so you can't lift the gate with the latches closed, or have a pressure relief valve set low enough to lift the gate but not tear anything up if the gate is lifted with the latches closed. If it is air it is usually slower to lift but easier to plumb. I don't know what kind of cylinders to recommend for air, but I almost think they might have been regular old hydraulic cylinders on the truck I drove with them. I have never built one but have plumbed them with parts from Columbia Body in Clackamas, they might be able to provide a kit for the lift arms that you could just install. I deal with them alot and they are top notch. A dump truck is twice the truck with one, they are not just for transfers!
     
  3. Ronsii

    Ronsii Senior Member

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    Thanks for the reply JPV :)

    I forget who built it ... could be a truckweld I'll check the tag tomorrow, I kinda like the ones I see with the air cylinders under the arms, would plan on air just to keep it simpler... in my mind anyways;) I think we have a two spool valve on it though for the hydraulics but would still rather go with air... we'll see I guess.

    Thanks for all the other info also :) looks like I got some research to do...
     
  4. Wytruckwrench

    Wytruckwrench Senior Member

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    Location:
    Wyoming
    I’m curious as to what you come up with. I have one that it would be handy to have a high lift gate on as well. Keep thinking I’m going to buy a rock box, but they are pretty expensive.
     
  5. ol'stonebreaker

    ol'stonebreaker Senior Member

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    Just weld/bolt some chains at the top of the box, weld some hooks on the top of the gate and use the latches as hinges so you can lower the tailgate to almost flat.
    Mike
     
  6. Ronsii

    Ronsii Senior Member

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    We actually already do that :) Have a custom set of rope/chain that pins into the top hinge, but it can be a chore to get the gate back up if there is no helper around and no machine to help either and your next load is dirt or gravel that needs to be spread...


    @Wytruck, was too busy to do anything with it today but it WILL happen :) sometimes these projects get drug out a bit....


    Oh, the box is a truckweld box.
     
  7. ol'stonebreaker

    ol'stonebreaker Senior Member

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    Unless you haul rubble or large rock a couple of properly placed D rings on the inside of the bed and gate with a cable come along should lift/lower gate back into position.
    Mike