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Marathon Auto Sewer Hose
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Our reversing valve is on top of the black tank on the passenger side. Our bus is 2 years older… but will get you a pic when I get home.
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Tom, Liberty customers can get service in N. Chicago from Mr. Bill on most things. The real big problem there is they have no way to lift a coach, but they will do most everything else. I should know, I have been there enough with the last two coaches…
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But, Mark, how do they put those purty blue lights on the bottom?
We’ve had service up in N. Chicago a couple of times. You can get lost in that place with all the different buildings.
Mark
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Ah Mark, the year of your bus gets you that attention in IL, try getting service there with say a 2000.
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Tom, I don’t know about that as my Liberty’s have been an 2011 and the current 2016. I have seen older coaches there, but I am not sure just how old they actually were. I never looked that close. Do they just refuse to service older coaches? Just wondering since you mentioned it…..
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Tom:
My my sewer water drain tap handle is in the curb-side water bay behind the right end of the face panel. I have to reach behind the end of the panel to turn the tap on the bay floor 1/4 turn. It drains to the ground. Maybe you have a drain hose through the bay floor and the tap might be above it.
But wait! Oh, oh! Yesterday my Marathon compressor started running way to often. Air pressure for the sewer hose keeps dropping and Marathon said there is no way to just turn off air to the sewer hose. We’re on a long trip so I’ll just turn the compressor off until I need it. Then get it fixed unless someone has an idea where to find the air leak … likely in the water bay behind something? I’ve checked a bunch of other fittings and tightened and siliconed the hose cap.
I knew this would happen someday. Somehow sleeping in a tent on rocks and peeing on the ground like in the old days has great appeal.
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Doug, is there a way you can identify where the air line to the sewer hose originates? Perhaps other Marathon owners or maybe a Marathon tech can give you information about where and how to access a fitting and then you can figure if a plug, a golf tee or something can be used to stop air flow to the sewer hose.
You don’t want to risk the lack of air pressure to your slide seals unless you are absolutely sure there will be no rain.
Even with my Prevost, if I get a chance to pee on rocks I do.
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Doug,
While you’re driving, the engine compressor is charging your system, so keep an eye on the aux gauge, if the leak is bad the compressor may not be able to keep up.
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Doug, send me a private e-mail with your phone number. I’ll call you Your private mail is not open.
Maybe I can help.
AL
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Marathon Sewer hose air leak update. Use it or lose it. 🙂
No more leak!!! We drove all day with the Marathon aux air compressor turned off (and the Marathon aux air and Prevost air separated .. ie. the orange knob in the driver compartment in the vertical position … Tom, to prevent what you cautioned … I am learning. Jon, the stupid Marathon sewer hose uses Marathon air which I always keep separated from the Prevost system, although they can be joined).
We used the toilet a couple of times and the toilet door while travelling; both operated with Marathon aux air. When we arrived at the campground about three hours ago I turned the Marathon compressor back on. It ran for a bit and shut off. Three hours later it hasn’t run once like it had several times with the leak. The Marathon aux gauge and the sewer hose gauge both show full air pressure.
So, like other stuff on this coach, the air leak seems to have corrected itself with exercise. Yesterday, along with the stuff I described above, I pushed the stupid sewer hose in/out switch several times thinking it might ‘unleak’ something. Maybe it did.
We exercise everthing on this coach every three weeks, including a highway run, and have found that we need to USE IT OR LOSE IT.
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Doug, I understand the sewer hose uses the Marathon air, but when you park and extend the slides you need to open the valve so the aux compressor is also keeping the slide seals inflated. They are getting air from the Prevost accessory tank.
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Thanks, Jon. Hope you have a good seminar at Jeff’s.
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Tom, Al jump in on this if I have this wrong. But I believe Jon is mistaken on this. I never combine marathon and prevost aux air unless I have an issue and my slide seals stay full marathon house air does that. The only time I have had to combine the two systems is when it’s really cold and something freezes up in an airline or something. my normal operation for me has always been separated.
Bill
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Bill , Jon is not wrong just a little confused.
I’ll let the picture do the talking.
AL
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If your aux compressor never pressurizes the Prevost accessory system, how will slide seals remain pressurized if the air from the slide seal source to the seals has a slight leak? How do you know the slide seals remain inflated if there is no source of compressed air.
I am not suggesting your seals lose air over night or even in a day, but if you remain in one place without the engine running for longer than it takes for Prevost accessory air pressure to drop to zero how do you know your slide seals are still inflated. This is a serious question because water leaking past uninflated seals has the potential to do some very serious and expensive damage.
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