[Gordon]

Richard,
In Steve's diagram I am assuming 2 travel solonoids, 2 raise solonoids (these 4 valves are located in the item labeled 6-pack) and w/the 4 SV's in the diagram, thats back to 8.

OR is there 6 valves in the 6 pack

OR are some of the SV's located in the 6 pack

I can see how fliping the tag dash switch, isolates the tag from the drive, but what does the red line pressure do? Also I assume that the second SV is also activated by the tag dash switch to exhaust.

Still don't see a need for line pressure?

I guess my OCD is kicking in but I really want to completely understand how this works.

I am in the process on completely replacing the air leveling system with something more reliable.

This later style should also allow using the tag axle in the leveling process with better control