SMALL AIR PUMP MAKING NOISE AND GOING BAD

Yours is in the front. Monaco changed it from the rear in 07 because of noise complaints while trying to sleep. Your air leveling system, adjusts your coach when you first push the button twice. Once leveled, the system goes to sleep. Every hour the computer "wakes up" and checks for level. If your coach is still level it simply goes back to sleep. If it needs adjustment, the air compressor kicks on to fill whichever air bag(s) needs air to relevel the coach. It then goes back to sleep for another hour etc. That said, you should hear a hum when the compressor kicks on and cycles. Unfortunately, because of it's location, your's is behind the front wheel, mine is in front of the duals, the three screws that fasten it to the frame have a tendency to become loose. The screw is fastened with a washer and a spring to allow some movement of the compressor as it cycles. These screws work their way loose and assuming you have all of them, they'll need to be tightened. I lost two and had to make my own replacements using materials I found at ACE Hdwe. I have no idea where you might be able to purchase them. I also did not take a picture of them when I had them off. Check to see if all the screws are there and that they are tight. Your noise will probably go away....Dennis