Primary air break gauge light & buzzer stays on
I have a 1999 T2000. My Primary Break Air gauge "red light" & "horn" stay on even after aired up. After driving for a while & or tapping on the break pedal they go off. I was told by a road Mechanic who opened the dash radio panel, its the Primary low pressure air valve. He removed the connected wire & the light & horn went off. I ordered one from KW. They sent me the wrong one, with a brass bottom thats about a 1/2" threaded. They acted surprised. The valve bottom needs to be about an 1/8" straight brass tube that somehow "slip" fits into a manifold. It looks like there's some kind plastic ring that may slide up & dn that hold this in place. I can't tell how this can be removed & replaced. Does anyone know? It seems like a tight fit, and I'm concerned about goofing this up, or something else in this tight area. Is this a concern?
Additional info: Thanks to Allen Wilson & Mel. Both of you offered good information. It was a slip fitting. At first I couldn't get it out. I released all the air out of the system & then fiddled with it and it came out. The new valve is only $15 so I'm going to replace both. There was also a leak in the trailer/tractor valve; which I've ordered also.
Additional Info: Kenworth sent me the wrong Low Pressure Valves. I took the truck to a shop & they pulled one of the valves & got the number off of it. Plugged it allowing the truck to run. Then they ordered the valve(s). Now they cost $89.00. ????? Trailer/Parking valve was about $285 plus an hr labor.
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