[Alex]

I did get under the rear and spray all norgrens and fittings, no obvious leaks.

After looking at “hectors suspension” interactive diagram, toggling between various modes, I can see that the front 2-way does not really control airing down the front or rear, it just controls adding air. It looks like ports 2 and 3 are connected when there is no control pressure applied to port 12. When there is pressure, port 3 is blocked and ports 1 and 2 should be connected, allowing are to flow to 1 of the 3-way norgrens.

I am not even sure if the 3-way valves are to blame. Based on their condition and general cleanliness, it would not surprise me if they all have been replaced in the last 5 years. Every single one has compression fittings instead of the push-to-connect. Someone has definitely been through this stuff before.

I do wonder if what I am observing could happen if the level-low manifold and solenoids has something wonky. For example, if there was a small leak, allowing air pressure from the manifold inlet to go past the front control valve, I think over some time it could pressurize the 3-port front valve and the 2-port further upstream near the bags. A slow pressurization of these valves might explain why I see the air dump 1.5 minutes after I air up the front. Once those two valves are activated it would dump all air from the front bags.

To make things even more complicated, I tested the tag axle with the engine running and the parking brake set, lifting it seemed to go ok, but when trying to extend the tag back down, the left rear dumped all it had in all bags, quite a shock. The only way to get it back up was to raise with level-low. Putting the bus in drive and keeping the level-low in “drive” did not work.

I honestly have no damn clue what is happening. It’s temping to throw money at this an replace everything, but that’s probably very wasteful. If I could just start by finding out why after 1.5 mins the front drops suddenly that would be nice…

[Alex]

Don Let us know if engine temp changes and how everything is working??

[Alex]

Yes, I do want it remote controlled, at least the pump-out. I plan on using Home-assistant from central control and remote, networked relays from Shelly

[Alex]

My 95 Chassis/96 Liberty XL takes 4.5 gallons. I’ve changed it twice over the years.

Here’s a PC thread I did last Nov when I changed it last:

/threaddetails.asp?Category=What%20did%20you%20do%20to%20your%20bus%20today?%3E&ThreadID=13830#108193

[Alex]

Thank you! We’ll be waiting for the new information.

Chris

[Alex]

See my post urging caution with a summit reserve. Important information

[Alex]

In my previous engineering life designing substations for wind & solar power, my load & generation studies concluded that the contribution to the electrical grid was very minimal and so unreliable that without fossil & nuclear power production rolling blackouts are inevitable with the addition of EV`s charging loads coupled with warmer summers and colder winters.

The snowflakes that migrate to EV`s should research the safety aspect of these. Sitting on top of multiple batteries inside an enclosed vehicle in an accident is just a cremation tomb in my opinion. Media has reported multiple EV fires that cannot be extinquished with traditional means. Use your head !!

I also don`t appreciate EV`s driving on my roads since they don`t pay fuel tax either!!

[Alex]

Is this being canceled?

[Alex]

Be sure to read my caution warning post on 21-22 Jeep Grand Cherokee posted under towing. At same Jeep store repairing mine there is another 21-22 grand Cherokee that the parking brake activated causing major damage. Jeep disclaims warranty. Mine is going a way as soon as it is fixed

[Alex]

Andrew, As you now know that leaky valve was a zero cost repair. After 33 years of ownership I can assure everyone that a whole lot of problems with our buses are easy repairs with little or no cost.

But I can also assure everyone that deferred maintenance can and will get very expensive because the initial problem is always like tipping the first domino.

Owners need to understand two things. First, on forums like this one there is usually someone who has had the issue, and can help a lot by offering advice on the solution. The second is for those needing advice to learn a whole lot of the answers provided on forums are from people who assume every conversion is like theirs and offer poor advice that does not apply to other conversions, or from people who do not have a clue and are willing to share their ignorance. That is being harsh, but bad advice can and will bite an owner in the ass so those seeking advice need to be certain of the quality of the advice. And if you seek advice do not shop for answers you like. Sometimes the correct advice is difficult or expensive, but is necessary.

BTW, no questions are dumb. There is not a single Prevost owner that knew all necessary about owning and servicing a Prevost so if you get some attitude about your questions ignore it. None of knows all we need to know, and most of us don’t yet know what we don’t know.

[Alex]

Another year w/o a bus. Still looking. Constantly surprised at how few well maintained buses there are.

Prefer late XLV / private toilet / no contingencies to an immediate sell.

Also now considering 00/01/02 H3-45 non-slide. My understanding is like the XL2 the H3 is a bit more expensive to maintain than a XL. Not the least of which is the availability of 365 tires.

[Alex]

This is exciting news! Thanks for the update and for spearheading this Chuck.

[Alex]

Are they planning on making and evap and condensing replacement? any clue on cost

[Alex]

Thanks Clay and Marshall, I will check out the options you suggest.

[Alex]

I’m sure once track management heard “Liberty Coach” they immediately put you in the “Driver’s Coach Lot”.

Let us know if FHU’s or just 50amp/240volt. Enjoy.