05-14-2015, 06:17 AM
I too replaced my HCV's with King of the Road and noticed a reduction in air usage. However, I never had usage like Jonathon is quoting except when my dash HVAC was operating and the air pressure energized the vacuum pump for the HVAC controls.
On my coach if consumption was high only when traveling then the operation of the HCV's is the culprit and changing the valves to a low consumption style would solve the problem. If the problem appeared both when parked and traveling then I would be searching for leaks - especially in the area of the HCV's if the leveling system otherwise worked fine when parked since mine are always pressurized even though their output is isolated at the 6-pack when parked.
On my coach if consumption was high only when traveling then the operation of the HCV's is the culprit and changing the valves to a low consumption style would solve the problem. If the problem appeared both when parked and traveling then I would be searching for leaks - especially in the area of the HCV's if the leveling system otherwise worked fine when parked since mine are always pressurized even though their output is isolated at the 6-pack when parked.
Jon Kabbe
1993 coach 337 with Civic towed