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Old 02-01-2015, 07:14 PM   #1
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Air Leak

Hello, new guy here looking for some knowledge. We have a new to us 1998 Monaco Dynasty. Today while we were letting the motor home run I could hear a loud, constant hissing of a air leak in the front. Crawled underneath and tracked it to a air line block(?). The block has two wires to the top, 2 air lines, and a brass fitting which is where the leak is at. A 7/16" socket fits it, diameter is about 3/8", and it is about 1/2" long. It appears to have a stone type filter in the end?
I looked for a line that may have blown off but see nothing. I do have pictures and will try to link to them or post them in this message. Could this be normal to leak air all the time? Could it be a vent, and something wrong inside the block is actually malfunctioning causing air to shoot out? The only thing air operated that I'm aware of that doesn't work is the step cover return. Thinking about it now I guess I should have flipped that switch to see if it changed.
I will try to get pictures here somehow. If I can't, I apologize. Thanks for any help.


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Old 02-01-2015, 07:18 PM   #2
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Oops

I don't see my pics. I'll try a link.
https://onedrive.live.com/redir?resi...t=folder%2cjpg
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Old 02-01-2015, 07:34 PM   #3
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Equipment varies over time but assume you have air bag suspension--this is the dump valve to lower suspension for lowering jacks when parking. They often stick open with debris....
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Old 02-01-2015, 07:55 PM   #4
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Thanks Old Scout. Is it possible to clean the debris out or will I need a new valve?
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Old 02-02-2015, 08:14 AM   #5
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This is a fairly common problem with DPs but dont recall reading about anyone taking the valve apart for "cleaning." Not familiar with the interworkings of the valve, could be that the solenoid failed vs debris. Guess I would look for replacement availability, then try taking the valve apart--nothing to lose at that point....
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Old 02-02-2015, 09:52 AM   #6
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You can try to spray some brake parts cleaner into the valve, to loosen debris that could be trapped.
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Old 02-02-2015, 10:23 AM   #7
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Try unhooking the wires first just to be sure controller is to telling it to squat.
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Old 02-02-2015, 11:49 PM   #8
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Thanks everyone. Got a chance to stop after work tonight and check it again. It is a mac valve for the air step cover. The valve is in rough shape, not sure what happened to it, but it is done. I have it off and trying to track one down.
In the meantime, what would be the easiest way to seal/cap the line? It's a hard plastic line with a compression type fitting. We need to use the motorhome on Thursday and I know I won't be able to have a new valve by then. Thanks
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Old 02-03-2015, 09:40 AM   #9
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Take valve to good supplied auto supply or plumbing supply and buy a fitting that fits the hose on one side and a cap for the other end.

Buy one for each hose so you can cap all.
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