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Old 09-11-2019, 08:29 PM   #1
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Help! Looking for Air Brake Part!

I have an Elite 40 ft deisel pusher. The vacuum check valve has broken. The part has been manufacture discontinued! The Haldex part number is KN23090. Without this part I have no brakes, no throttle control and no way to engage the automatic transmission, not to mention turn off the engine! I am now stranded at an RV park and don't know what to do.

No alternate part is listed by Haldex!

Any one have any ideas? I hope?

Thanks
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Old 09-11-2019, 11:44 PM   #2
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Welcome to iRV2 .

I'm more than a little confused .

Diesel , and vacuum are two words that usually don't go together.
Haldex builds air compressors for diesel engines.
So a vacuum check valve , is not what I expect to be required in a diesel motor home.
Do they build vacuum pumps too ?
I will research the part number , but I'd ask you to post a picture of the part.
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Old 09-12-2019, 10:01 AM   #3
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Online search turned up a listing on ebay . for $ 117 .

No image

I'm still in the dark as to where in the air system this part is used .
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Old 09-12-2019, 10:34 AM   #4
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The part is between the primary air tank and the secondary/governor tank. The part appears to prevent loss of air from the primary tank. Unless of course it has broken in half. Not sure how to post a picture. I will if I can figure that out.
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Old 09-12-2019, 10:39 AM   #5
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Picture of broken vacuum check valve

Attached a picture of vacuum check valve.
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Old 09-12-2019, 10:42 AM   #6
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For info on posting , this link will help .
Remember to resize any photo ; 640 pixels works fine for me.

Forums 101 - posting, photos, accounts, basics

I'll go through my air system diagram to see if there is an alternate name for a valve in the location you describe.

EDIT , I see you figured things out while I was typing .
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Old 09-12-2019, 10:47 AM   #7
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Air system parts in the location you describe , are just labeled " check valves " in my diagrams .

What chassis is your coach built on ?
Year ?
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Old 09-12-2019, 11:17 AM   #8
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I'd ask if you've taken this part into a parts store that deals with highway rigs and seen in the can cross reference it to a Bendix check valve ?

The major differences , are going to be ; inlet/outlet thread sizing .

Pictures are of Haldex KN 23080 on the right and Bendex Ben800375 on the left.
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Old 09-12-2019, 11:22 AM   #9
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Just in case you're viewing my last post I won't try to edit it.

Honest these online photos are listed under the part numbers , and are of the same part .
Probably the same offshore supplier.
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Old 09-12-2019, 11:33 AM   #10
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Gullig chassis 1990
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Old 09-12-2019, 11:38 AM   #11
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Yes was at Fleetsupply parts yesterday, once they saw original part was MDed they were clueless and offered no help at all. I have a call into Gullig now, guy at lunch, trying to see about a replacement part. Have found both your above parts online also, just trying to confirm they will work.
Thanks for your help!
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Old 09-13-2019, 10:21 AM   #12
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Update to Air Brake Parts

After talking with both Haldex and Gillig tech people I found out by tracking down the connection off the vacuum check valve its purpose! Its was a modification made by PO to allow an air connection for filling tires and also to supply air to the air horn! To get back on the road I simply by-passed this modification!
Thanks for the help. Hope this update might help another person....
Soon I may be able to help others with problems on older deisel pushers.
I have learned a lot in the last 3 months, not all my problems have been remedied, but I now am familiar with LOTS of issues and look forward to sharing with everyone I can!
Thanks again! I really think this site is GREAT!!!
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