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coupling a tanker

Discussion in 'Tanker, Bulk and Dump Trucking Forum' started by fluffingston, Jun 12, 2015.

  1. Jun 12, 2015 #1
    fluffingston

    fluffingston Bobtail Member

    8
    1
    Jan 7, 2015
    0
    Hey guys I have a question about coupling tankers. I noticed ,like in the pictures below, there is a plate that this kingpin is attached to that is further back from the front of the trailer. In a dry van the fifth wheel would simply hit the front of the trailer lift a little and slide right into the kingpin.

    So my question is how do you couple the trailers shown on the pictures? Does the plate with the kingpin slide to the front of the trailer or do you have to have the fifth wheel slightly lower that the front of the trailer when backing up so It will hit the plate with the kingpin properly? Thank you for your input. tanker1.jpg tanker2.jpg
     
    fluffingston, Jun 12, 2015
    fluffingston, Jun 12, 2015
    #1
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  3. Jun 12, 2015 #2
    stevez57305

    stevez57305 Medium Load Member

    336
    217
    Jan 8, 2015
    Florida
    0
    Same way as any other trailer it just gives it more lift to drain the oil out. I had a sand trailer with 1 bigger than that before
     
    stevez57305, Jun 12, 2015
    stevez57305, Jun 12, 2015
    #2
  4. Jun 12, 2015 #3
    SLANT6

    SLANT6 Road Train Member

    1,094
    1,376
    Dec 3, 2012
    The Nut House
    0
    You couple it like any other trailer
     
    SLANT6, Jun 12, 2015
    SLANT6, Jun 12, 2015
    #3
  5. Jun 12, 2015 #4
    wsyrob

    wsyrob Trucker Forum STAFF Staff Member

    5,769
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    Sep 14, 2007
    Winston Salem
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    Line your drive tires up with the tank fenders like you would the sides of a box trailer.
     
    wsyrob, Jun 12, 2015
    wsyrob, Jun 12, 2015
    #4
  7. Jun 12, 2015 #5
    bigdogpile

    bigdogpile Road Train Member

    1,931
    1,463
    May 16, 2010
    fontana ca
    0
    Your plate with the kingpin on the trailer should never,ever be able to slide..
     
    bigdogpile, Jun 12, 2015
    bigdogpile, Jun 12, 2015
    #5
  8. Jun 13, 2015 #6
    later_dude

    later_dude Bobtail Member

    46
    759
    Mar 22, 2008
    eugene,or
    0
    You never want the 5th wheel lower than the plate. You might hear what you think is the locking jaws locking, but they could have only locked around the knob on the bottom of the kingpin. This is called high pinning. You can tug the trailer to the point of burning rubber and drive away convinced that you are coupled but you are not. Because of this, when I drop a trailer I always try to leave about 2" of air under the skid and dump the air bags until the skids are supporting the tank/trailer then drive out from under it. This way when I, or someone else hooks back up, the fifth wheel lifts the trailer up those 2 inches and you won't have to worry about high pinning or driving all the way under and past the 5th wheel (as long as you are lined up like the previous poster explained) The plate is solid my tank and doesn't move. This is just what I do and it may be wrong. I learn something new every day.
     
    later_dude, Jun 13, 2015
    later_dude, Jun 13, 2015
    #6
  9. Jun 13, 2015 #7
    later_dude

    later_dude Bobtail Member

    46
    759
    Mar 22, 2008
    eugene,or
    0
    I never want the 5th wheel lower than the plate. You might hear what you think is the locking jaws locking, but they could have only locked around the knob on the bottom of the kingpin. This is called high pinning. You can tug the trailer to the point of burning rubber and drive away convinced that you are coupled but you are not. Because of this, when I drop a trailer I always try to leave about 2" of air under the skid and dump the air bags until the skids are supporting the tank/trailer then drive out from under it. This way when I, or someone else hooks back up, the fifth wheel lifts the trailer up those 2 inches and you won't have to worry about high pinning or driving all the way under and past the 5th wheel (as long as you are lined up like the previous poster explained) The plate is solid my tank and doesn't move. This is just what I do and it may be wrong. I learn something new every day.
     
    later_dude, Jun 13, 2015
    later_dude, Jun 13, 2015
    #7
  10. Jun 13, 2015 #8
    Oldman49

    Oldman49 Medium Load Member

    353
    299
    Jul 20, 2014
    0
    It's never a hook....until you look ...!
     
    Oldman49, Jun 13, 2015
    Oldman49, Jun 13, 2015
    #8
    Mike2633 and wsyrob Thank this.
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