Hadley system 450LXi

[dentmac]

A little more info.
It appears that changes were made to the ECU. The Drive :tag ratio was changed to 65:35 from 60:40 to take some of the load off the front axle.
When the genset was moved , the total net effect was to lighten the right front by 500#( and add 500# to the left rear.) In order to equalise the front side to side loads, the front airbags were plumbed together and the ECU was altered to take the average height of the 2 front level sensors. One side can be 3 inches and the other 5--BUT the average is perfect at 4. If the average is low, then air is increased to both sides via the manifold (and the air line between keeps the pressures exactly the same.) The side to side level is maintained only by the drive axle height sensors. In a corner , the right side may compress, but the left side will increase-- the average height does not change. If the brakes were applied at the same time, the average height would decrease so air would go to both sides, raising the coach.
It appears that separating the right and left airbags (by de-activating the solenoid) has no useful effect.

To weigh individual corners on the 450, one would have to drop all air or put the coach in SLS (level ) mode on level ground. Drive mode masks the discrepancies in the front.