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Tridrive truck question

Discussion in 'Experienced Truckers' Advice' started by Nothereoften, Dec 18, 2019.

  1. Dec 18, 2019 #1
    Nothereoften

    Nothereoften Light Load Member

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    What should the kingpin setting on your trailer be to get enough weight on your steers? I am using trailers set up for a tandem currently with pretty shallow kingpins and never have enough on the steer axle.

    Lowbed, hiboy and dump trailer
     
    Nothereoften, Dec 18, 2019
    Nothereoften, Dec 18, 2019
    #1
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  3. Dec 18, 2019 #2
    AModelCat

    AModelCat Road Train Member

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    I seem to recall my old man had the log bunk on his tridrives set at about 21" or 22" ahead of the center diff. That got him where he needed to be with his particular setup. I'd imagine a 5th wheel would be the same deal since its all about where the trailer weight gets transfered to the frame. May not be the same measurement with your truck though as it largely depends on wheel base and truck specs.
     
    AModelCat, Dec 18, 2019
    AModelCat, Dec 18, 2019
    #2
    Nothereoften Thanks this.
  4. Dec 18, 2019 #3
    Nothereoften

    Nothereoften Light Load Member

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    I can barely get to over the center diff, part of it is neck length, i run into the back of the rgn or dolly legs.

    Thing has under 30000 km on it and the boss is buying a couple new trailers, i'd like to make someone else's screwup (ordering the truck) end up beneficial
     
    Nothereoften, Dec 18, 2019
    Nothereoften, Dec 18, 2019
    #3
  5. Dec 18, 2019 #4
    npok

    npok Light Load Member

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    Sounds like you need a longer neck to get you some more clearance.

    Do you have plenty of room before hitting the back of the cab if you were able move the 5th wheel forward?
     
    npok, Dec 18, 2019
    npok, Dec 18, 2019
    #4
  7. Dec 18, 2019 #5
    AModelCat

    AModelCat Road Train Member

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    Where are you running? I seem to recall in the BC regs that a tridrive must carry a minimum of 27% of the drive axle weight on the steer axle at all times. Screenshot_20191218-211417_Samsung Internet.jpg Here's the regulation I found.
     
    AModelCat, Dec 18, 2019
    AModelCat, Dec 18, 2019
    #5
    Isafarmboy, Nothereoften and Cat sdp Thank this.
  8. Dec 19, 2019 #6
    Nothereoften

    Nothereoften Light Load Member

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    Alberta, local construction company. I remember martin posting something about that awhile ago
     
    Nothereoften, Dec 19, 2019
    Nothereoften, Dec 19, 2019
    #6
    Isafarmboy and AModelCat Thank this.
  9. Dec 19, 2019 #7
    Nothereoften

    Nothereoften Light Load Member

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    Yes i need a longer neck, yes plenty of room. I flipped the tandem jeep neck over and slid the fifth wheel forward one day. Had enough weight on the steers to turn. Took more room than the tandem truck with the tandem jeep to turn
     
    Nothereoften, Dec 19, 2019
    Nothereoften, Dec 19, 2019
    #7
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