[Jim]

Jim,

If your gauge is same as mine than it is a Headhunter part and should be available from them, if you desire to change it out. http://www.headhunterinc.com/

[Archived]

Jim,

Our coaches have 3 air systems. All are provided air pressure by means of the engine driven compressor.

The primary and secondary systems are exclusively for braking and until they are satisfied with approximately 75 PSI the auxiliary air system will not be pressurized. Once the brakes receive 75 PSI all three systems will continue building pressure until the compressor cuts out at around 120 to 125 PSI. A pressure drop of around 20 PSI will cause the compressor to kick back in and repressurize the systems.

The auxiliary system is for everything else and its principle job for our coaches is for the suspension system The suspension consists of 8 air bags and is actually 3 separate systems that only share an air supply. Other than that single supply point the three are independent of one another. When driving each suspension system height is controlled by a dedicated ride height valve. When parked, such as at a campground the suspensions can be raised or lowered as desired primarily to level the coach.

With the key off, air is locked into each suspension system and if there are no leaks the coach will remain as it was just prior to turning off the key.

The HWH merely piggy backs on top of the Prevost level low system and If I am correct and you have aux pressure it will try to maintain the coach in a level condition even with the key off.

When the engine is not running the JunAir compressor is providing your auxiliary air system with pressure as long as you have its circuit powered. For storage there is likely no need to maintain aux system pressure. When the coach is outdoors however aux pressure is what keeps the slide seals inflated so there will be times when a coach does need to maintain aux pressure

There is a whole lot to our air systems but the only thing you need to understand is you should do a pre-trip brake check and you need to keep moisture from the systems by maintaining the air systems.

[Jim]

Jim,

The Junn-Air should be your aux pump that provides air to all your accessories including suspension. If I’m not staying in the bus, I turn mine off in case there is a leak and the pump would run continuously. If your Royale has HWH, that auto leveling system may work with the key in the off position, checking the bus for level every so often. If it doesn’t function with the key off, then aux air is less important while the bus is setting. If you don’t need aux air inside for the toilet, pocket doors, bed lift, etc., then keeping the aux pump on is not necessary.

Keep in mind, assuming the HWH does not function with the key off, your suspension air is locked in all the bags and your aux air can be zero and should have no effect on your suspension.

Jon and I posted about the same time, so sorry for any duplication.

[Peter]

Thanks Tom and Jon……just trying to wrap my head around all the systems and how they interact. While we wait to leave in 3 weeks I’m reading all the manuals and the “operators” manual has been read 3 times already!! I’m also watching the videos I took while brandon explained all the systems but there are still plenty of holes in my learning curve. Thanks for explaining it very simply for me. So, I guess having the JunAir off is no biggie while in storage and yes the HWH is “supposed” to monitor the coach and keep it level while parked with the key off……thus far, I have had great level sites so I just dump the air and check for level with my EZ-LEVEL and if all is good that’s how she sits.

I’ve only tried the HWH auto level once so far and that was prior to my right rear leak situation so it didn’t do to well. I’ve had the coach parked now for almost 3 weeks and the rear has moved less than an inch….the front however has dropped considerably so I’ll be checking the valve above the air bags up front like the back once we get into a bit of a warmer climate…..daytime highs here have been in the low twenties to high teens…..brrrrrr, can’t wait to hit the road.

We’ve decided to make Nashville our stopping point on the way to Florida so we should be there on the 27th and 28th of December then on to St. Augustine for some much needed R&R.

[Greg]

If needed Jim, don’t forget Prevost is in Jacksonville and I’m there now. They do great work and you’ll be real close going to St Augustine.

[Greg]

Already did a mapquest from Bryn Mawr to Jacksonville prevost…..looks like less than 40 minutes if I should need anything. Lots of help down there in Florida but where I live in Northern Michigan, at this time of year, not much help at all.

[Jim]

I would disable the automatic leveling feature so the compressor isn’t working excessively.

We have had a coach that would maintain the level position with the key off. There are so many things that can cause the system to seek level it was just better to leave it off. The system to maintain level is sensitive enough that a number of people walking front to rear or side to side was sufficient to cause it to make an adjustment. Winds are a major cause for the system constantly trying to adjust itself. Bottom line, we get it as level as possible and then turn it off.

If doing that the coach starts to lean side to side or settle in the front, you have a leak in the suspension at the respective position and that needs to be repaired. A tight coach will sit level for a very long time. The Prevost standard has been three days, meaning if it hasn’t moved in three days it is acceptable.

[Sammy]

I do have the level system off right now. My coach holds air for much longer than 3 days. As I said, the rear is less than an inch off from when I parked it 3 weeks ago…..the front stayed aired up for over 5 days and then started to settle down. The temps don’t help much either….being so cold seemed to always affect my coaches ability to hold air while in cold storage. That is why I want to wait till warmer temps to make a determination if there is a valve that needs replacing. Will know soon enough.

Packing up the bays this weekend and then next week we will start to take interior stuff out to the coach so the morning we leave it’s just start it up and hit the road. I’ll be spending 3 nights at our rental property down state for Christmas….I put in a 50 amp plug but it is outside storage next to the house.