[Archived]

Patrick,

Not sure what you have going on, but those Norgrens control the Liberty Auto Level. I had to change them out on my 01 Liberty and had no issues with the new 3 ports. Mine were leaking.

[Archived]

I see your valves are labeled with the K41EA00KS1KV21W2 part number.

Mine only says K41EA00KS1KV2 and is missing the last 3 digits. In the catalog, the last 3 digits of “1W2” make the valve change from a 120Vac to a 24Vdc. The spool on mine says 24Vdc.

Are they really different?

[Archived]

Way back when (in the good old days) Prevost had not forced Norgren to apply proprietary numbers for standard Norgen valves. So it was easy to find and replace valves. We had the option to buy from Prevost or go through a Norgren distributor. I did not even record the part numbers in the log book for the first coach because all I had to do was look at the valve.

When I got the second coach the Prevost proprietary numbers were in use. I used the Norgren numbering system where each character has a meaning to determine some valve numbers and the rest I got from the spares I retained from the first coach. I am now nearing the replacement of valves on the current coach and will have to play Dick Tracy to determine the Norgren numbers and then decide if it is worth ordering direct or from Prevost.

Over the last several years we have had posts in which various numbers were identified but rather than trust what could be incorrect numbers I will likely use the Norgren book to identify each valve part number. I think we only use a 3 port with one actuator and a spring return, a 5 port with two actuators and spring returns to neutral or “off” and as in the post above a 3 port 24V solenoid valve actuated with a spring return.

Just so there is no confusion the valves I described above are for my XLII Liberty and may not be the same as other conversions.

For those in the middle of trying to determine where to connect air fittings and how they work, look at the number on the actuator fitting such as the 12 on the three port valve, and notice when air is applied to inlet 12, it opens the path between ports 1 and 2. It is that simplicity that helps keep us out of trouble.

[Bill]

Here is a thread on the K41EA00KS1KV2

https://prevostcommunity.com/forum/threaddetails.asp?Category=&ThreadID=6236

The last three digits “1W2” are for the coil, yours is probably 24v. My Liberty is a Classic, so mine are 12v coils.

[Archived]

Don,

I think we should give you the title of Archive Guy and of course lifetime free dues.

You always help by posting a link from the search function and it’s most appreciated.

Thanks…..

[Archived]

Ill try to bench test them this weekend and see what come of it. I still cannot think of how they are different or just acting different than the existing valves.

[Andy]

Patrick,

I had the same problem that you are describing. The drivers bay left norgren in front floor that is electrically actuated was leaking out the exhaust port. Rebuilt it once and replaced it once. That did not help. Turned out that I had a 5 port on the rear bulkhead in front of the drives , Outside valve that was leaking and feeding back to the front valve and exhausting. Had that one replaced and no more leak. I know of at least one more liberty owner who had the same issue. If You have already changed that one out in the rear. It might be bad from factory.

[Larry & Diane]

Rocky,

I could see how that would be a problem. I have changed out both 5 ports on the rear bulkhead without an issue.

I have ruled that out in my mind since the old valves work perfect and the new ones exhaust in both positions.

I hate to keep speculating and need to get out there and test them individually instead of keep everyone guessing.

[Allan]

get you some gray tefflon tape. Much less prone to leaks than white. FWIW

[Gerald]

Don, et.al:

Do we have a list of all of the Norgrens on a Liberty Classic to include the one on the back wall of the compartment as well as those at the wheels? I’m about to do them all. Thanks for the numbers for the ones Liberty added on the plate next to the steering box. Got a terminal case of the leans and am tired of playing whack a mole.

Thanks

[Mark]

There are 10 total Norgrens, 5 in the front and 5 in the rear.

Just inside the steer compartment door, on the bulkhead to the lower right near the 5 stack, is a Norgren 3port/2 way K910026 = K41EA00KS1KA2 spool valve, and the upper is a 5port/3 way K910058 = K81EA00KACKAC.

Just fwd and above the steer axle is a K910026 = K41EA00KS1KA2.

Then on the floor of the steer compartment, for the AUTO leveling option, there are two electric Norgren spool valves= K41EA00KS1KV2.

In the rear on the bulkhead just fwd of the drive axle, there are two, a left and a right, Norgren 5 port/3 way spool valves, Prevost # K910058 = Norgren# K81EA00KACKAC.

There are 3 more Norgrens on the inside of the frame rails above the tag axle. 2 on the street side and one on the curb side. Their part #s depend on your buses tag logic/mod status. Your yr model could have the old tag bag reverse logic that allows the tag bags to deflate when the accessory system pressure drops below about 30 psi. Prevost issued a service bulletin, # 96-14B, to change the system so this would not happen.

Your bus could have come from the factory with the new logic incorporated?, or a previous owner may have had it installed?

So what tag logic do you have? If you have an inversion valve? you have the new improved logic that keeps the rear from sagging when the accessory pressure drops below 30 psi.

Here’s SB96-14B: LINK

[Archived]

Thanks Don.

I am just outside the VIN range in the bulletin (T1025914) – and it’s an XL40, not a 45, so it would appear to be the late type.

Based on this, what valves do I need to change the other three, if you have that handy?

Getting closer…

[Rudy]

Chip, my short answer is “I don’t know”. Maybe Jon, Tom or someone will chime in here with the answer.

But my long answer is: SB96-14B calls for: two “normally open” Prevost# 131460 and “one normally closed” Prevost# 131384. Call Prevost Parts

or

replace the body(2 way/3 port) of each valve is Norgren# K41EA00, $38 ea online,

or

buy the repair kit is Norgren# 54237-59, $26 ea online.

It looks just like K910026 or K41EA00KS1KA2 which is a normally closed valve which may work in place of pt# 131384 mentioned in the 96-14B. But the other 2 are normally open. Maybe all that is needed to do to make the N.C. K41EA00KS1KA2 into a N.O. valve is swap the two bottom fittings with each other?

Maybe someone will be of more help than me here?

[Art]

The level low systems on our coaches have evolved and have been subject to changes over time. So what is correct for Don’s coach may be applicable to a great extent to other coaches, but not completely.

To add to the complexity using Liberty as an example, converters have modified the level low in some cases and their modified system may have had evolutionary changes.

As if that wasn’t enough to frustrate someone, at some point Prevost had Norgren assign proprietary part numbers to off the shelf Norgren valves so we cannot always count on using the part number on the valve to order from Norgren or one of its dealers.

My only suggestion is to use Don’s part number information as a base starting point, but count and identify the type and number of valves on your coach and then verify there is a match in the Norgen catalog.

[Archived]

Working on multiple air leaks. What a shock.

Ordered a new norgren valve, and the instructions call for “An air line lubricator capable of lubricating at low as well as high air flows should be installed as close as possible to the valve downstream of the moisture filter”.

I could not find any posts relating to providing lubrication to the norgren valves on our coaches.

Any thoughts or advice for or against?