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Author Topic: Relay? valve leaking  (Read 1858 times)
KC Eagle
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Posts: 22

83 Eagle in process

« on: June 12, 2006, 06:57:56 PM »

Greetings all! I am doing my conversion entirely from advice gleaned from lurking on this board (well, not quite, but close). I aired up the system of my model 10 Eagle in preperation for a move and I have a steady leak from what I believe is the exhaust port on the right rear relay valve (sits low near center of coach midway between the drive and bogie). I rapped lightly a few times on it in an attempt to dislodge a possibly stuck valve but it had no effect. I noticed this port appears to have 4 screws holding it in and am thinking about removing them to see if there is anything I can clean out?? I also noticed the cooler ( the copper "S" bent piping) has been disconnected and bypassed so that the compressor output goes directly to the Bendix air dryer - should I attempt to get this reconnected? I assume there must have been some type of leak or damage to account for the disconnect. Suggestions?
Hero Member
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"The Mighty GMC"

« Reply #1 on: June 12, 2006, 07:07:55 PM »


Chock the wheels, release the parking brake and see if you still hear the leak.

Usually the sound of escaping air  in the relay is from another source like a diaphram.

If the leak goes away, block the bus, set the parking brake,  clamp off each of the air lines into the relay (vise grips) one at a time until it goes away.

If this doesn't identify where its coming from let us know.


1975 GMC  P8M4905A-1160    North Central Florida

"There are basically two types of people. People who accomplish things, and people who claim to have accomplished things. The first group is less crowded."
Mark Twain
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