KW T800 Suspension Leveling

Discussion in 'Trucks [ Eighteen Wheelers ]' started by durallymax, Jan 30, 2012.

  1. durallymax

    durallymax Medium Load Member

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    Have a 96 T800 with AG100 suspension.

    The feed mixing box we have mounted on it is much heavier on the drivers side of the truck due to the way it is constructed (two heavy augers on that side and one large reel on the other). During mixing the feed is also directed to the drivers side for proper mixing and discharge.

    All of this weight shifting to that side really makes the truck lean badly to the point that the rear fenders are about an inch off of the tires on the drivers side and about 5" off the other side measuring with my eyeballs at the hump when loaded. Fenders are individual full coverage poly fenders on each wheel (tandem truck) we had issues with it on our old truck which was a WG64 Volvo, but got it leveled out at one point, but I was too you to remember what they did and never really payed attention to it. I do think we added a leaf to the front end to level out the front axle. This truck could also benefit from leveling of the front as well.


    But as for the rear, is there a leveling valve not working, or does the AG100 not level side to side under these circumstances and if not what would be required to help it level out?

    The box mounted on it weighs 16,500lbs. There is typically 9,000-12,000lbs of feed in the box for a net weight of 28,500lbs.
     
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  3. JDP

    JDP Medium Load Member

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    Sep 25, 2011
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    It depends where the leveling valve is located on the axle. I'm no expert, so I'm not sure if it can be done with 1 leveling valve or 2. If it can be done with one, it should be located on the heavy-side of the truck so the valve measures the distance from the frame to the axle of the the heavy side because it is obviously sitting lower.

    This may cause problems because I believe the valve equalizes air pressure side-to-side. That's why I'm thinking 2 leveling valves might be required (1 valve to control the air pressure on each side).
     
  4. durallymax

    durallymax Medium Load Member

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    So from what you're saying, the equalizer is just making sure the pressure is the same between them and adding pressure as needed to maintain its preset height. So if it is mounted in the center, it will never equalize completely to level it off in this application meaning another one is needed on the lower side to balance it back out? However would the first equalizer conflict with this idea if it trys to equalize pressure side to side? Since the second valve would be adding air to the lower side and the corresponding side would have less air to get the truck leveled out? Meaning maybe two would be needed with one on each side to make sure both frame rails maintain equal height but not allowing the bags to equalize side to side pressure wise?

    Or am I way off?

    Ill crawl under and see how it is plumbed.
     
  5. kwforage

    kwforage Road Train Member

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    I put dual levers on my AG100. It is not really a good suspension for a straight truck with a heavy box. Wish I woulda known before I bought it, but I make due with it. It's a whole lot better after I changed it now though. The dual levelers helped alot with the leaning on side hills and I put Timbren rubber springs in to help with the swaying going down the road. The Timbrens probably aren't really necessary for you unless you travel to differnt farms with the mixer loaded. They are about $1k and the dual levelers are way cheaper. I have less than $400 in mine and I even added an air gauge for each side and a dump switch for each side. I welded some steel to the bottom of each of the rear bag pedestals to hook the linkages to. If you decide you would like to put dual levelers on I could diagram how I plumbed it and take a few pics for you. I just did my brothers AirLeaf cause he liked the way mine worked.
     
  6. durallymax

    durallymax Medium Load Member

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    Sure that would be great if you would like, Im sure it wouldnt take much to figure out but time saved is time saved.

    We do spend a lot of time on the roads which is why we have a truck and not a tractor(farm tractor) with a mixer wagon. Trucks are a much bigger PITA to maintain but we spend a lot of time on the roads. It doesnt sway too bad going down the road but definately could use some leveling out.

    Thanks.
     
  7. JDP

    JDP Medium Load Member

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    There ya go, take it from someone who actually runs a straight truck, not an OTR tractor. I was going off my experience in the shop. I would assume you just plumb the left side drives together and the same for the right side. Then you have 2 points of reference for leveling instead of relying on a single point which in this case can obviously be distorted.
     
  8. Scrapper

    Scrapper Light Load Member

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    Nashville, AR
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    You might could even go one step further and plumb in manual switches to go along with your leveling valves. Would be nice if you could somehow put a scale on either side that could be monitored from inside the cab. Say you have 10000 on one side and 18000 on the other. It would take some fab work and time tinkering with pressures for different weights, but once you learned them you would be set. Would be really neat to set up. Keep us updated on what you do and how well it works.
     
  9. durallymax

    durallymax Medium Load Member

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    If the setup that kwforage has with the dual levelers auto levels it, im not sure what the need would be for for the load gauges as the feed box itself weighs in 10lb increments. I could see it on a truck that doesnt have a scale already on it though.
     
  10. Scrapper

    Scrapper Light Load Member

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    Nashville, AR
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    Just throwing ideas out. I understand that the load levelers work. Figured it had its own scale. Just was talking about the side to side weight. Not the total weight. That way you can keep track of the amount on one side compared to the other. And if you could manually adjust it have a little more control over it for different conditions. Sometimes the loadlevers are not as good as you would like. Sometimes I over complicate things. I think to much! lol. :biggrin_25517:
     
  11. durallymax

    durallymax Medium Load Member

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    I understand where you are coming from there in saying we might not like the performance of them.

    And I overcomplicate every idea I come up with people tell me, but in the end its always nice.
     
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