Dumping Air Bags on the Scale

This was a test to see what happens when air bags are deflated

In the first image i am scaling the truck normally by setting the tractor brakes (air bags remain inflated) and leaving the trailer released

Second image is remaining in the same position on the scale with tractor brakes set and setting the trailer brakes which in turn dumps air out of the trailer.
The end result is by setting my trailer brakes i have severely altered my steer weight.
You can see in the second image with my trailer deflated it took the weight off my drives and added it to the steers.

First image is with all inflated
12040
30840
32000
74880

Second image is with trailer deflated
13440
28820
32260
74520

In my Cascadia when Tractor is set air remains

20170905_105202 by albert l posted Sep 5, 2017 at 10:17 PM

20170905_105243 by albert l posted Sep 5, 2017 at 10:17 PM

 

I have edited my original post as i did not explain it correctly.
I did not slide my 5th wheel, the weight went from the drives to the steers when the trailer dumped it air

 

I had been meaning to take these photos for ages
Leaving the terminal today, i was able to do it and not hold anyone up
Just wanted to show one instance of the weight variance when dumping your trailer air
See too many guys pull onto a Cat Scale and dump their trailers

 

In my truck (LT Wt Cascadia) i can set my truck brakes and because it does not dump any air my drive weights stay the same regardless if i have my brakes set or released
I have seen guys pull onto a Cat Scale in a Cascadia and set both brakes and have the trailer dumping air, hence not getting what i belive to be a correct scale ticket

 

Thank you
Now that I am awake and have re-read @STexan post again, I understand what happened with the binding as I have read previously you guys talking about it.
However when taking the photos for the purpose of showing what happens on a scale, the binding process was not calculating in that little old pea rattling around in my head.
When I get a chance in the future, I will scale again and post the results.