Forum Discussion

Saturated_Fats's avatar
Sep 13, 2014

Are these CAT scale results possible?

Got my F-150 and 5th wheel weighed today and the CAT scale came up with the following:

Steer axle: 7540 lbs
Drive axle: 940 lbs
Trailer axle: 7480 lbs
Gross weight: 15960 lbs

I haven't done this before, so I didn't know what to expect, but the drive axle weight seems goofy.
  • No, those weights have to be off. With those weights your front springs would be collapsed and your rear tires would do nothing but smoke if you tried to drive. A reweigh is definitely in order.
  • Those numbers can't be right. Granted I have a TT and not a fifth wheel but with the trailer hooked up and some gear in the bed my weights are as follows.

    Steer Axle: 3550
    Rear: 4250
    Trailer Axle: 6950

    When I unhook the trailer it weighed in as follows:

    Steer Axle: 3650
    Rear: 3300

    The numbers on your steer axle and rear axle are certainly wrong.

    Stu
  • You probably pulled too far forward and had the drive axle mostly on the steer axle weight pad.
  • What probably happened is the front axle was on the front scale pad and the back axle was MOSTLY sitting on the front scale pad with some weight on the second pad.

    Its entirely possible that the GCW is correct. If so, then your pin weight is anywhere from 1900-2300 ish lbs.

    If my theory is correct then your truck when hitched up is sitting at 8480 lbs.

    A re-weigh is in order, making sure that the front axle is on pad 1, the rear axle is on pad 2, and the trailer axles are on pad 3.

    Thanks!

    Jeremiah
  • Hi,

    Chances are that the front and drive wheels where on the forward section of the scale, and weighted together. It also seems like the drive wheels where part way onto the center section of the scale, giving the 940 pound weight on that section.

    Try again, this time making sure that the front axle is on one section, the drive on another section, and the trailer on the back sections. . .

    Fred.
  • I think your hitch is mounted a little too far forward. Like Sixteen Feet!
    Dave
  • You can see the seams between the weight pads. Watch in your mirror as you pull on and make sure the rear axle is on the middle pad.

    Do not pull all the way up to the call box; at that point you're probably too far forward. Remember, these scales are designed for big rigs, not for us.

    I just accept the fact that sometimes, the weigh is going to catch me on just the front pad because I have to get out to press the button on the call box. Sometimes I try to stand on my running board, but sometimes that's not possible.
  • I use the DW to make sure the axles are on the pads correctly. Can be difficult to be sure looking in a mirror.

    If you show the ticket to the CAT operator they may give you a free reweigh.

    Then do a second with the truck only so you can get an accurate pin weight.
  • Ron3rd's avatar
    Ron3rd
    Explorer III
    fla-gypsy wrote:
    You did something wrong. Time for a do-over


    x2, CAT has a nice tutorial on their site on how to drive onto the various sections of the scale. Haven't done it in a few years, but I believe there are 3 different sections. Sounds like you had your truck positioned wrong.