-
Verify Norgren part numbers?
I am wondering if someone can double check what I have for part numbers for Norgren valves. I have a leak on the rear of the coach when parked, and I just assume it might be easier to replace the Norgren valves involved rather than try to diagnose the leak location.
My understanding is that there are 2 5-way and 2-3-way valves that control if air goes in/out of the bags (on the rear). From the parts manual and Prevostcar ordering page, I see two p/n’s:
2.000 2.000 EA 177F 159.13 641531 VALVE, 5-WAY 3-POS 22/07/30 26.26 344.52 2.000 2.000 EA 177F 164.12 641357 VALVE 3 WAYS-2 POS NC 22/07/30 27.08 355.32 That costs about $700 from Prevost. Trying to source these at lower cost via Norgren part numbers. I believe these are the ones, just wondering if anyone can confirm:
Getting them there costs about $364
Do these look like the equivalent parts? Thanks.
-
12 Replies
-
Part numbers from several years ago.
5 port K81EA00 KAC KAC
3 port K41EA00 KS1 KA2
order from Norgren direct.
-
My Prevost chassis is a 1995 XL40. The following from my mx logbook: https://secure5.volvo.com/technicalpublications/pdf/Sb96-14B.pdf
Norgren 5 port/3 way K910058 = K81EA00KACKAC – https://www.norgren.com/us/enNorgren 3 port/2 way K910026 = K41EA00KS1KA2 – https://www.norgren.com/us/enIn 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, then there are 3 more Norgrens on the inside of the frame rails above the tag axle. Their part #s depend on your buses tag logic/mod status, like SB96-14B or not.Your results may vary -
I would find leak maybe only one are two leaks my marathon had all push in fittings mine was leak on push in at morgen take off fender you can check several on h model
-
My bet is on a push fitting. BTDT. Just mix up some Dawn soap in a spray bottle and have fun.
Good Luck
-
I have done the spray soap thing to no avail. I also have the ultrasonic tester, which helped me find a leak at a T fitting, but I still have other leaks. Could be a bag, but could also be an internal leak on one of the Norgens. I’ll probably try the soapy water again, but I suspect I will still find nothing.
One thing I probably need to do is monitor each of the 6 bags on the rear to see if there is a particular one causing the lean. I think if it’s limited to one of the tag bags, then it’s probably the Norgren that controls that (or the push to connect fittings there).
-
I took another try at the soapy water for leak checking and found a couple. The drain valve on at least 2 air tanks (on driver side) that connect directly to an air bag are leaking. Not sure if I was just not soaking them enough last time, or just totally missed them. Regardless, what joy it is to find an air leak! There may be others, as I only have the driver-side fender off right now. These look like typical 1/4″ NPT mini-ball valves, but I have not removed one to confirm.
A couple of the Norgrens actually look kind of new, and couple perhaps original. I am going to leave those alone now until I triple check all connections with soapy water. Soapy water, ball valves, and teflon tape is certainly a lot cheaper…
-
Andrew:
There are two side of the following fix (do it – don’t do it). Make your own decision.
The drain valves on the small ping tanks for the air bags are Notorious for leaking, some people (including myself) have removed the drain valves and replaced them with a plug.
The thinking is, you only check/drain the ping tanks once a year so just pull the plug once a year and not fight the possibility of a leaking valve all the time. Make sure your system is dry and not full of or making moisture if you are considering going this route.
Chuck
Jeff and Lindsay
91 Marathon XL -
I pulled all mine out and installed a square drive plug as chuck mentioned. I live in a very dry environment, had my bus over 2 years, and never a drop have i seen in any of my tanks.
-
I happened to pick up some ball valves before I read the last two posts, so I went ahead and installed those. If they last 5 years without leaking, I’ll be happy. They are stainless, so maybe they will be kind of durable.
I suspect I still have many other leaks, but I am going to tackle this one section at a time, left-rear, right-rear, then front. I don’t have to go anywhere for several weeks, so I am hoping that’s plenty of time to find all of the leaks.
FWIW, I have the electronic leak detector, the Inficon Whisper, but anything it can detect, I can also detect easily with my own ears. I was hoping it would be super useful, but so far not really.
-
After replacing the two valves on two of the tanks on the left rear, I still had the left side go to 0 psi over a couple days, so I went ahead and ordered 6 more new ball valves to have enough for all 8 tanks. I don’t need to be anywhere for a few weeks, so I am dedicated to finding all of these leaks. I did happen to find a leak at one of the push-to-connect fittings going to a norgren.
Some of these leaks are hard to find because you really need to make sure you are saturating every single tiny part of the connection. I leak I just found recently, I know I went over it before and did not see anything.
It does look like I have 2 new-ish norgren valves, but the rest on the rear look quite old. I will probably replace the older ones just to avoid replacing them later.
I also ordered a decent amount of overstock/old-stock Swagelok 316SS fittings, tees, elbows, straight, 45’s, in 3/8 and 1/4″. Finding them on eBay makes these higher end fittings a bit more reasonable to purchase. So I am probably going to switch from “find and replace” to “replace it all”…
-
Once the weather gets cooler, more leaks will show up.
-
I rebuilt a 2-way norgren, the one that dumps the left tag air bag when raising the tag axle, and I used all compression fittings for the valve. That seems to have fixed my leaks in the rear, at least for now. I thought I had a leak on the right rear, but replacing the ball valves on the per-bag tanks might have fixed that. I also replaced the ball valves on the from air bags. So far I seem to be maintaining a level coach.
Log in to reply.