Brakes and Scales

It's the bind that can cause that. Trailer brakes pulling against the truck tandem brakes because the trailer brakes and truck drives are on seperate scales.
I set either the trailer brakes or the tractor brakes, but not both.

 

I always set my brakes and shut off my truck.
I've gotten scaled at scale houses and the weights match.
You just to be close on your axle weights while staying under gross.
Mainly they are looking for the goof in the rocket scientist thread.

 

Set your trolley on that scale, release it on the call button, let her float a bit. But don't release it all the way. Just a little bit.

Also, try to glide onto the scale without any power, just idle up to it and let her get on. Once on, be gentle.

I love how the english language comes out just so. ugh....

 

I never set my brakes on the scale
Scales are flat and level you wont roll off and if you do that scale wont be accurate
In my case I pull a tank so I have to let the liquid settle down to get an accurate weight

 

Just leave it in gear and shut it off.

 

If you have a trailer that dumps the air bags when you pull the red trailer button, these are what can cause the biggest weight shift anomalies when you do a full brake set on the platform.

Recommend either only set tractor brake or, in gear, engine off

 

We use to pull weight off of axles while rolling the scales.

 

Ours do this. When the trailer settles as the air dumps, it pushes the kingpin against the 5th wheel and the binding causes the weights to read light on the drives and heavy on the tandems. I've seen it off by as much as 1500lbs depending on the load and distribution but generally it's a couple to 500lbs. Only took twice for me to realize what was happening and never had an issue after that.

setting the tractor brake only gets an accurate weight