Fifth Wheel Placement

Discussion in 'Experienced Truckers' Advice' started by Sportster2000, Mar 5, 2011.

  1. Sportster2000

    Sportster2000 Road Train Member

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    So at work there is one truck that will not scale out at all. The front end is always heavy/overweight. I move the 5th wheel all the way back in the assembly and it is still overweight. I have tried three different trailers with weight placed in different spots. It is not the fact that I don't know how to load a trailer because I do know how to load the trailers that I use at work. So it has come down to unbolting the 5th wheel assembly and moving it back to get it all to work out. Is there any law or legal reason for me not to be able to move the assembly back and rebolt it in a different location that it came from that factory? I see the custom strectched truck rolling down the road with the 5th wheel all the way at the end of the frame and another guy in the shop thought that there was a legal thing behind it. I don't know so please school me on this. :biggrin_25514:
     
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  3. WMGUY

    WMGUY Road Train Member

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    As far as length you need to know your over all length i don't think your gonna have a problem their either way...

    how much over weight are the steers in this case??? do give us an idea of how far you need to move it.

    what is the pin placement on the trailer... 3' or 1.5' this will make a difference on 5th wheel placement from the factory also
     
  4. Sportster2000

    Sportster2000 Road Train Member

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    I have been overweight anywhere from 400 to 1,500 pounds on the front end where on other trucks it is legal. The gross weight has varied from 67,800 to 75,000 pounds depending on how much weight I add to it. Trying to stay around 74,000 pounds gross. The movement on the slide of the 5th wheel is only 10 inches of movement. The pin location on the trailer does vary. With a box van it is set back farther. With the flatbed it is closer to the front. I never took the time to measure have far back the pin was on the trailer but I did take notice if it was more towards the front. With the flatbed the tandems are in a fixed position and I think that the trailer is only 42'. The tandems on the van are moveable and that trailer is 45'. I am thinking that if I unbolt the 5th wheel assembly and move it back 6 inches that it might weigh out right, but is that enough. The center line of the 5th wheel as it is right now is in the middle of the tandems on the truck. I have been fighting this problem for 3 days.
     
  5. Allow Me.

    Allow Me. Trucker Forum STAFF Staff Member

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    Do you have a scale at your workplace? If so, and very carefully, put your loaded trailer over the 5th wheel in both forward and rearward positions and weigh the steer axle. Yeah, I know, the kingpin won't be secured to the 5th wheel, but you are on your own scale and you will NOT forget that it is not secured before you get the necessary info and then attache it (trailer to power unit) to move it. You can then decide if you need to re-position the 5th wheel.
     
  6. Sportster2000

    Sportster2000 Road Train Member

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    Yes there is a scale where I work. I scaled the truck with the 5th wheel slid all the way forward and then all the way back after that. Is that what you are descibing?
     
  7. 25(2)+2

    25(2)+2 Trucker Forum STAFF Staff Member

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    I think you need to get the front axle weights with the 5th wheel slid clear forward and clear back.

    10 inches isn't much to slide.

    What does the front axle scale without a trailer?
     
  8. haulhand

    haulhand Road Train Member

    So what you are saying is that your steer axle weighs between 12400 and 13500 why worry if your axle and tires are rated for it you are good to go most all states allow 20000 on a single axle. My T800 goes 13800 on the steer bobtail and around 14400 depending on the load but if you are under 80000 and and all other axle weights are legal I wouldn't worry about it
     
  9. Sportster2000

    Sportster2000 Road Train Member

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    I have scaled it with the 5th wheel slid all the way forward and all the way back with two different trailer and weight combination on it. The front axle is a 12,000 lb rated axle. When it is bobtail the front axle is 12,200. With the 5th wheel slid forward it is 13,500 on the steers. With it all the way back the lowest I got the front was 12,380 without me in the truck.
     
  10. 123456

    123456 Road Train Member

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    5th wheel is NOT the problem !!
     
  11. Sportster2000

    Sportster2000 Road Train Member

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    Until you explain what you are talking about 123456 I have no idea as to what you are talking about. That is like someone coming up and saying the answer is Topeka. It doesn't get me anywhere.

    The original question was is there any legal concerns on why I should not move the 5th assembly further back. Since no one has said yes or no to that then on monday I will change things around and see what I get.
     
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