Air Pressure relief valve?

[98Dynasty]

Please see attached picture. Does anyone know what the part number is for this device on my front air tank. Tow truck driver removed this part instead of hooking to front air port. Now it leaks (not from the threads).

[Skip426]

Here's an air brake parts manual, that's helped me in parts identification.

http://www.suspensionspecialists.com...dbook_2009.pdf

My first guess would be an air tank , overpressure relief valve.


Edit: I'd be tempted to drain the tank of air pressure, remove the valve and take it to any shop that repairs semis, and they should be able to provide a replacement.

[twinboat]

Looks like a manual tank drain that he mangled so bad that it won`t close. Pump down the air in the system, unscrew it and go to any truck shop for a new one.

[98Dynasty]

Thanks twinboat, manual drain valves are on the bottom of tank. This picture is taken from ground up and this device is on the rear of the tank near the top

[jacwjames]

https://www.google.com/search?output....0.C30upSUUx0w

NAPA AUTO PARTS

Try these, I think the part # is a KN31200. Pressure relief valve used on a 1999 Dynasty and others.

[djhinds]

Go to any NAPA with truck parts, they have them. It probably is a #150 over pressure relief valve. Mine leaked also, got one at NAPA for $16..

Good luck
Dave

[Mike Canter]

Dave and Jim are both correct they sell them at Napa and it is a standard pressure realease

[98Dynasty]

Thanks guys, I ordered one from ebay for $7. Haldex KN31200. Do I use Teflon thread tape when I install it?

[Mike Canter]

Always on air fittings

[ShapeShifter]

Originally Posted by Mike Canter

Always on threaded air fittings

There, I fixed it for you. Don't use teflon tape on push-in or ferrule type fittings or on tapered or flared fittings. (Of course, I know you already know this, but it doesn't hurt to be explicit for others. )