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Old 06-26-2013, 08:54 PM   #1
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Join Date: May 2013
Location: Gig Harbor, WA
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Mysterious Beep '05 Monaco Cayman

First trip in my 2005 Monaco Cayman 33' (300 Cummins). On long climbs, a beeper will start sounding without any associated warning lights. It is the same beeper that sounds when you first turn on the ignition, but goes away after engine start. I called Monaco tech support and they said that it was low hydraulic fluid in the leveling jacks reservoir. Filled reservoir, same thing. Called them back, they said if it wasn't the leveling jacks then it was probably an air leak in the suspension. No leaks detected by an RV mechanic. He said that he remembered something about a Monaco recall concerning a spurious beeper around that year that entailed disconnecting a wire to the beeper, but was not sure. It only happens on a long uphill stretch and stops when I level off or go downhill. I thought it might be the temperature, but it happened again in a cooler area when the engine temp was 20 degrees cooler on the climb. By the way, I checked the coolant reservoir too.
Any ideas?

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Old 06-27-2013, 08:02 PM   #2
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Sometimes with OLD coolant you will get a warning even though the coolant level is OK.

Something about the sensor and its resistance in conjunction with the coolant level sensor and the OLD coolant.

I only know and heard about this strange occurrence through the Monacoers Yahoo Forum.

Monacoers : Monacoers

Being a Monaco owner, I would suggest joining.

Dr4Film ----- Richard

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Old 06-27-2013, 11:40 PM   #3
"Formerly Diplomat Don"
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Location: Moorpark, Ca.
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We also have an 05 Monaco. You probably have one of two issues. When we drove our coach home from the dealer, we noticed a beeper that slowly increased in loudness as we started to climb a grade. It was faint at first and then went to a full beeping. We stopped and called Monaco support. They told us that Monaco had installed it's own overheat beeper that came on way too early. It wasn't needed because the Cummins computer/system would definitely let you know if you were overheating.

I found the beeper behind the dash under the dash cover over the gauges. I disconnected it and never had another issue.

There is another alarm issue that many 04-06 models seemed to have. On the bottom of your parking brake (in that side panel next to your left leg) is a sensor. It's the alarm that tells you that you haven't set your parking brake. Usually, this one acts up by alarming for a few miles after you release the parking brake and then stops.

Lastly......how did you fill your leveler tank. I was surprised to find the instructions in my manual the other day when I was checking something else. Your suppose to lower one jack (doesn't matter which one) about six inches, turn the ignition on and the levelers on. You should hear the alarm if the tank is low. Go back to the tank and fill until the alarm stops.
Don & Mary
2019 Newmar Dutch Star 4018
2016 GMC Canyon 4WD Crew Cab
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Old 06-28-2013, 12:24 PM   #4
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Thanks for your responses. I'll follow those leads. I didn't see the instructions for filling the leveling jacks reservoir until after I'd already topped it off. I haven't used the jacks since, so maybe I'll lower them with the filler cap off the first time to vent the excess and avoid overpressuring any seals.
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