[Archived]

Good job, especially the new dot fittings…

[glen]

This has been said previously, but it needs repeating.

Owners of a Liberty Classic are going to have 12 volt coils for the top and bottom 2 solenoid valves and 24 volt coils for the center valve.

The center coil has the shortest life because it is energized anytime the coach is being driven. Typically if it fails owner’s just pull a coil from any other solenoid valve and they can keep on driving. But in the case of a Liberty Classic you cannot use the other coils as spares so it is important you keep both 12 and 24 volt coils as spares.

I believe all other conversions use 24 volt coils on all positions.

The center solenoid valve supplies air to operate the ride height valves and is necessary to keep that part of the system working while driving. The other solenoid valves are part of the level low system and if any fail the worst that will happen is you might not be able to level the coach when parked.

[Mike]

Awesome info guys!

My Bus is a 2000 Liberty Lady “Classic” on a H345. – I will inspect the stack once I pick her up and make sure I have the parts needed on hand in my tool box!!

Thanks for such detailed information and pictures – much less daunting!

mike

[Archived]

The coach leveling systems have undergone a myriad of modifications over the years as Prevost upgraded the system. The leveling system may seem daunting with all the Norgren spool valves and the features, but in fact the underlying principle regardless of model or vintage is the same.

When driving the center (or second down on a four valve stack) solenoid valve opens and shifts the Norgren spool valves (usually the 5 port, but later models are using three port on the steer) so air to the air bags flows through the ride height valves which add or delete air from the air bags. That is how the constant height from the road is maintained.

When leveling the center solenoid valve is closed and depending on what is needed to level the coach, the remaining solenoid valves shift the Norgren valves so air can be added or deleted as required to level the coach, lower it or raise it. Look at the suspension as three separate systems, left rear, right rear and front to simplify the understanding of how it works and when trying to chase issues such as the leans.

When the key is OFF, all of the control valves (5 port usually) shift to the neutral position and air is locked in each air bag so the coach will remain at the position it was in when the key is turned off.

When we have our next seminar this is one topic we cover in as much detail as the class needs.

[Fred F.]

Hey Don,

Do You happen to have the part #’s for the armatures , relays and spool valves ? Pretty sure My 24V relay is toast. Going to replace them all and might as well get the spool valves while I am at it.

Thanks in advance,

Rocky

[Adrienne]

Copied and pasted from my mx log Rocky, I hope this helps.

Installed 5 new Norgren
coils(4x12v, 54452-02 & 1x24v, 54452-03) and 5 Norgren
armatures(54462-31).

[Archived]

Don ,

Yes that is a big help, Thank You Sir ! Now all I need is the top Norgren number. I have the lower with the exhaust port as # K910026

Safe travels,

Rocky

[Archived]

Disregard the request for the other norgen spool valve #. I had to take off the bracket that hold the pressure switch to gain access. The # is K81EA00KACKAC . These are the Prevost numbers for them. If anyone has the Norgren numbers I would greatly appreciate them.

Thanks in advance,

Rocky

[Dana]

There is a thread somewhere in which we provided all Norgren numbers instead of the proprietary numbers Prevost makes Norgren label the valves. If you cannot find it in a search I may have to spend an hour or so rummaging around in my garage but I might be able to find them.

[Larry & Diane]

Here is what I found in my mx log.

Removed the old & replaced w/new the two Norgren level low valves in the steer compartment, one was a K910058 = K81EA00KACKAC, & the other was a K910026 = K41EA00KS1KA2

Here is some more info from a previous thread too

https://prevostcommunity.com/forum/threaddetails.asp?Category=Pneumatic&ThreadID=6295

Here is some more info from a previous thread too

https://prevostcommunity.com/forum/threaddetails.asp?Category=Pneumatic&ThreadID=6295

[Walter]

Here’s another thread gents

https://prevostcommunity.com/forum/threaddetails.asp?Category=Pneumatic&ThreadID=6243

[Larry & Diane]

Jon,

If you find it, put on the nugget topic please.