[cfree3]

I am not known for tact, so please forgive me.
con
Was the coach working properly relative to leveling before you changed the HCVs?

I was taught to look for "what changed". If you wade through the posts, you changed the HCVs, then concluded they were in upside down. Then reversed them. Then you reported the driver tag won't inflate.
So it's important to know if the system was operating properly before the change. If it was, then let's go back on do some diagnostics on the HCV install.

I am confused about what you are observing. Is the problem the driver side rear will not raise? Is the problem the driver side tag will not inflate? Both?

If you look at the arm on the HCV, is it level? or pointed upward which would tell the HCV to put air in the bags?

We are trying to help, but we are limited on the full story, and you aren't answering questions about the situation that are asked. Sorry for my blunt comments, we are really really trying to help you.

OK this is the history.

Last year our rear kept dropping while parked and in auto leveling. We made an appointment at HWH to have it looked at. They replaced both raise solenoids in the rear 6 pack. Our rear end started to raise faster and would hold after that. We had also noticed and confirmed while we were at HWH that during travel our rear end was riding low. Low enough to be putting a grove in the outside of our drive tires. HWH said that was a HCV problem and they don't deal with that. We also noticed our drive air bags were cracked and needed to be replaced. We had replaced the tag air bags last summer. We made it to Wisconsin where we have been parked all summer. We put on the 4 new drive air bags and but on the two HCvs.
Now when we put it in travel the right side lifts up perfectly but the left side is not. The mud flap is still on the ground on that side and the bus is leaning. We checked the solenoid valves on the 6 pack for travel and they both click as they should when activated. The HCV on the left side appears to be working right. We have disconnected the air line out and as it sits, there is air going though it.

Also when we put the bus on manual raise the whole rear end seems to raise except the tag axle bag on the left side.

We are wondering if there could be a problem with one or both of the small solenoids that are for the tag only on that side. If the exhaust solenoid is not letting enough air through to the supply tank would that keep the that side from lifting all the way??? Can we by pass this solenoid temporarily so that we can see if that is the problem?

Thanks for any ideas.