Scaling help, 75' combination with 5 axles.

My math shows you took 1,080 lbs off your steers and the second weigh looks good. I am not sure what your concern is?

 

Brakes were on ?? Roll onto to scale softly and shut off in gear if it’s a standard transmission. If not only set tractor brakes ..

 

Was your mom in the passenger seat on the first weigh?

I couldn’t resist. Maybe there was an issue with the scale. I’ve scaled back to back within 5 minutes and my gross was a 2k difference between the two. Hard to trust scales. Also possible on the second weigh a little of your steer tire was off the scale.

 

Your kingpun is pretty far rearward of drive center?

 

I’m guessing your fifth wheel is rear of center on your drive axles as mentioned above. Adding weight to your drives will take weight off your steer axle if that’s the case.

 

How many holes did you slide on the rear tandems ?

 

Slide your seat two notches back.
And hammer down.

 

Putting a fatter person on the teeter totter or closer to the fulcrum.