For some reason the search isn't working, so please bare with me if this is a duplicate.
Today I found a leak in the fittings going in and out of this check valve on line 57 that exits the aux air pump and goes to the wet tank. I could not get the two push-on fittings to seal, so I removed it to replace the fittings. Looking inside, I see some rust, so I tried to blow through it. In the direction of the flow arrow, it's very hard to blow through. In the opposite direction, it's easier, so I'm guessing this has failed. I can't find a cross reference based on the part numbers. Anyone know what the specs are so I can replace it?
There is a Meritor WABCO sticker with part number 9341990020 which doesn't come up. In the body it's stamped Midland N-13526-BR.
KN23080 - Check Valve - Haldex product (https://www.haldex.com/en/na/valves-9c82abc0/check-valves/haldex-new/one-way-check-valves/kn23080/)
KN23080 by HALDEX - Check Valve (https://www.finditparts.com/products/368723/haldex-kn23080)
Haldex KN23080 One-Way Check Valve, 1/4" Ports: AnythingTruck.com, Truck &... (https://www.anythingtruck.com/product/070-KN23080.html)
Keith, I may have a few spares, I'll check tomorrow. Jim.
Thanks, but a replacement will be here Tuesday. :) I may need that water pump though...I couldn't fix the leak and the new one SAYS it won't be here until Friday.
I have the same issue with the press to connect fittings leaking after I reassembling the all the fittings when I installed the Service Bulletin C003300.002 It added a check valve between the control manifold and the filter.
When I check the Haldex check valve I have no resistance in either direction so I've ordered another one from NAPA KN23080 but I do question the push to connect fittings. Do others have issues with these? Was there a reason for use since this is the only application I see that uses them in the manifold.
I have the HWH AIR CONN DIAGRAM from 2004 and there is no check valve shown so it must have been added later.
Tyson
I have had all of the problems above. Wife can walk around coach and then holler at me. "You got another air leak" As I replace them I try and replace with the compression fittings. Some of the fittings I need I am not able to find in compression and go back with the same press on. Only a mater of time before it leaks.