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Old 01-18-2023, 04:19 PM   #1
Mini-Skoolie
 
Join Date: May 2020
Location: Tannersville, NY
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Year: 2001
Chassis: International 3800
Engine: DT466e 7.6L
Question Need help identifying a part - leaking connector

I finally decided to break out the soapy water to identify where my air system is losing pressure, and I found two similar connectors that I think are the culprit. It's a slow leak, but I figure I should try to replace the connectors as soon as possible to avoid overworking the compressor. Can anyone identify what these are and where I may be able to get replacements?

One is located on the firewall where an air line connects to the driver seat, and at one point in time, the stop sign (removed and capped off). The other is located at the back of the air tank.




Thanks for any help or suggestions!
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Old 01-19-2023, 08:13 AM   #2
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Location: Walnut, KS
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Year: 2000
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Engine: Dt466e
If you are referring to the valve in both pictures, it is a pressure protection valve. They are used to protect the brake system from a failure in a non-critical system, like air seats, heater controls, etc.
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Old 01-19-2023, 08:53 AM   #3
Mini-Skoolie
 
Join Date: May 2020
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Engine: DT466e 7.6L
Yep, that’s it. Thanks Biggin!

Now the real challenge of trying to find replacement parts…
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Old 01-19-2023, 11:14 AM   #4
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It is a KN 31000
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Old 01-19-2023, 11:32 AM   #5
Bus Nut
 
Join Date: Mar 2017
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Rated Cap: formerly 71 now 2 or 4
the valve on the left does not look like a presure protection valve and if it was it would be mounted at a tank like the second valve. it looks like a quick realease valve need a wider shot of that valve o be sure
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Old 01-21-2023, 08:31 AM   #6
Mini-Skoolie
 
Join Date: Nov 2022
Location: Jacksonville, FL
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Year: 1999
Coachwork: Thomas
Chassis: International 3800
Engine: DT466E/AT545
On your firewall pic, my bus had a line coming from accessory tank (black line in my photo) to this device and then a line going back to dash (gray or silver line) which basically ran the stop sign and kiddie gate on front bumper. I took the feed to dash out (and solenoid andnregulator in the dash) and it leaked. I discovered the cylindrical thing turned and was basically a valve. When I closed it fully no more leak. I will eventually buy a push-to-connect plug and insert.
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Old 01-21-2023, 04:58 PM   #7
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That is an RV-1 pressure reducing valve. I have only seen them used to supply air to the range shifters on big manual transmissions.
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Old 01-22-2023, 11:00 AM   #8
Bus Nut
 
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Quote:
Originally Posted by Biggin View Post
That is an RV-1 pressure reducing valve. I have only seen them used to supply air to the range shifters on big manual transmissions.
yea now i remember where i seen it thanks! problem is trucks dont have shifters anymore
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Old 01-28-2023, 02:04 PM   #9
Mini-Skoolie
 
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Quote:
Originally Posted by mmoore6856 View Post
yea now i remember where i seen it thanks! problem is trucks dont have shifters anymore
They still have shifters but they are controlled by a computer now instead of the driver.
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