Tag Axle Air Pressure Control

[Richard and Rhonda]

I have a 95 Newell. On the dash board is a rocker switch marked tag axle. You have to hold it in the up or down position to activate it. It will return to the center position automatically. It is obvious that holding the switch up dumps air out of the tag axle bags, and also obvious that holding it down reinflates the bags. However, there is no way of determining how much pressure is in the tag bag.

Also, there is only one gauge in the rear engine compartment. It reads the overall air system pressure. I do not see a regulator for controlling the tag air bag pressure.

One more tidbit. Others have described a three gauge setup in the right rear engine compartment. I only have one as stated above, however, I see a couple of screw holes where something could have been mounted and later removed.

Does anyone know how this setup is supposed to work? With what I know I feel I am operating blind with regard to tag air bag pressure, which is to say I am blind to the weight distribution between the drive and tag axles.

Thanks for any insight on this.

Richard