I am confused on my CAT Scale weight

Discussion in 'Experienced Truckers' Advice' started by johnnyman1099, Aug 11, 2019.

  1. johnnyman1099

    johnnyman1099 Medium Load Member

    353
    390
    Mar 13, 2017
    0
    I am very confused about my CAT scale weight with my truck and trailer. 2016 Kenworth T680 and 2019 48' Utility flatbed. Fully fueled and def tanks.

    Empty bobtail- 20,900 pounds gross
    Steer- 11,860
    Drives- 9,040
    ** I am concern about the heavy steer weight.

    Truck and trailer empty- 31,300 lbs gross
    Steer- 11,980
    Drives- 12,200
    Trailer- 7,120

    Truck and trailer loaded with 46k- 77,680 lbs
    Steer- 10,980
    Drives- 33,100
    Trailer- 33,600

    My confusion is why did my steer axles lose weight when loaded ? When i hook trailer to truck, my steer axle gain some weight. But add a heavy load and my steer axles lose weight ?

    I went to two different CAT scale for my loaded weight and confirmed that my steer axle is correct.

    So was there an issue with the original CAT scale with my empty weight ?

    I am staring at all of my original CAT scale tickets. Not a typo.
     
    D.Tibbitt and singlescrewshaker Thank this.
  2. slim shady

    slim shady Road Train Member

    2,973
    8,257
    Sep 14, 2011
    Chicago, Il.
    0
    Steers lose weight as the trailer load
    Takes the weight off them
    Basically lifting the front axle
    Kind of a teeter totter effect
     
    tscottme, ChevyCam, rank and 7 others Thank this.
  3. MACK E-6

    MACK E-6 Moderator Staff Member

    30,713
    100,607
    Sep 19, 2005
    Baltimore, MD
    0
    Is your fifth wheel slid way back?
     
    rank, PE_Trans, baha and 6 others Thank this.
  4. Socal Xpress

    Socal Xpress Road Train Member

    1,381
    1,287
    Dec 6, 2014
    Los Angeles, Ca
    0
  5. johnnyman1099

    johnnyman1099 Medium Load Member

    353
    390
    Mar 13, 2017
    0
    If that is correct, it must be a Kenworth T680 thing because all of my previous Freightliner trucks (Century, FLD, Cascadia) never lose weight on steer when loaded. Steer axle gain some weight when loaded on all of my previous trucks.

    5th wheel is fixed and cannot move. It is located in front of rear drive axle.
     
  6. SteveScott

    SteveScott Road Train Member

    2,288
    5,990
    Nov 10, 2015
    0
    Imagine a very short teeter-totter. One end is your steer tires, and the other end is your drive tires. Sit on the drive tire end and the steer tires go up, or lose weight.

    I drive reefer and keep my 5th wheel plate either all the way back or no more than a couple notches from the back. That way if my drives are at or below legal weight, I know that my steer tire weight will be fine even with a full tank of fuel. If I kept my 5th wheel further forward than the middle position, it would run heavy on the steers even if I was legal on the drives.
     
    Last edited: Aug 11, 2019
    singlescrewshaker and FlaSwampRat Thank this.
  7. SteveScott

    SteveScott Road Train Member

    2,288
    5,990
    Nov 10, 2015
    0
    Yep, fixed 5th wheel Cascadias do handle it differently. I drove one for a couple years, but like my current T680, if you were legal on the drives, the steers were good to go.
     
    FlaSwampRat Thanks this.
  8. Powder Joints

    Powder Joints Subjective Prognosticator

    5,848
    4,429
    Sep 25, 2007
    Rosamond, SoCal
    0
    I personally do not see a need for slidding 5th wheels, Like Ron Popiel, I set them and forget them. My steers do not change weight except for a couple of hundred pounds, never have to worry about them. In the old days guys would stretch everything out, but personally do not like the way that handles. I like balanced loads. 34 on my trailer, 34 on my drivers and close to 12 on my steers.
     
  9. singlescrewshaker

    singlescrewshaker Medium Load Member

    383
    745
    Dec 31, 2017
    Palmgetto, FL
    0
    If what you say about the teeter-totter effect is true, which it is & I too agree with for the most part.. Then why did his steer gain 120lbs with the empty trailer.?
     
  10. Powder Joints

    Powder Joints Subjective Prognosticator

    5,848
    4,429
    Sep 25, 2007
    Rosamond, SoCal
    0
    probably just the difference between the scales, you can go on and off same scale and sometimes get a small variance.
     
    singlescrewshaker Thanks this.
  • Draft saved Draft deleted