relay valve still leaking air??

many valves are bad out of box, unhook EM MAXI.air lines till leak stops?

 

i have put on 4 bad out of box.{china remade}

 

have you been in a warmer climate???

i've been in 2 trucks i'm thinking might need new dryer filters. they don't leak when in the south. but come back up north. and my tanks will be empty in 10 minutes.

 

You still may have another bad maxi. The air is leaking through the center of the maxi from the spring brake side, and going back up the service line and out the exhaust of the relay valve. Either take off the service lines from each maxi one by one to find your culprit, or pinch off the air line to the spring brake side one by one. Now, I did have this truck years ago with this very same problem. The truck sat for about a year. Once the brakes were released for the first time after sitting, ALL 4 maxi's leaked!!! I removed the service line and from all of them to confirm. Just dry rot/rust of the center seal inside.

 

I have the same problem on my 1998 freightliner.Where are the maxi brakes located on it so I can check them first before I return the new relay valve I just installed?

 

hey so my quick release air brake valve leaks air.. I removed all the brake pot service lines and the valve was still leaking air. I replaced the valve and it still leaks air. I ordered and installed another new valve and its still leaking... anymore ideas????

 

its a 2009 Peterbilt 367