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Sorry, work has kept me from getting under my trailer. I'll be off tomorrow if you can hold off.

That and breakaway are probably a couple of the many reasons they switched to the current system.

Bleeds out at the airpack IIRC, nothing releasewise on the trailer at all Dave

Dave, the older trailers don't have a relay valve at all. The have a single airline that comes from the service side of the truck and goes right to the brake chamber that applies the master cylinder.

RE: Emergency Relay Valve problems Eventually I can. I've not moved it since it came home. Might be able to save this one

RE: Emergency Relay Valve problems If you tape it, you may prohibit it from releasing all the way. You could put in a piece of oil bath air cleaner foam but you will have to tie it in so that when it starts to clog, it's not simply blown away.

RE: Emergency Relay Valve problems There are 2 different braking systems. Those with the relay valve and those without. Those without are very simple. If the air line (only one) is hooked up to the service side of the deuce and the valve is open then it works like this. As you apply brakes on...

RE: Emergency Relay Valve problems While we're on the subject of relay valves, I could use one if anyone is boning out another M105 type trailer.