08-10-2017, 03:37 PM
On my 93 coach there is one line coming from the front 6-pack that is air from the "supply" tank. There is a second line going from the HCV to the 6-pack HCV solenoid ports. When in the "travel" mode (with the HCV solenoids energised to open them) air pressure is adjusted by the HCV to raise and lower the air bag pressure in order to keep the coach at the desired ride height.
Jon Kabbe
1993 coach 337 with Civic towed