[Shamu406]

John,
First thing can you verify that your 12V & 110V air pumps are working and building proper air pressure.  Your 12V air pump should build air pressure to about 55 psi.  Your 110V air pump should build pressure to between 110 & 120 psi.

R-1 is the front basement compartment on the right side.  I have seen over a gallon of water collecting in that air tank.

The second three gallon air tank is located on the front wall of the right wheel well in front of the right drive tire.

Since you are having so many air problems I suspect water is your issue and the first place I would look.  It is also the easiest place to start.  If you find any water, then you are going to need to get it out and replacing the desiccant filter is a good starting point.  Remember you live in a very humid climate so your coach is going to collect water much more than a coach in Arizona.  Once you get the moisture under control, then I would start valve by valve fixing or replacing them.  In your climate I would be replacing the desiccant filter once a year.

Working on a Newell is not difficult for some one with some tools and mechanical skills.  Understanding the different systems and how they work can be challenging.

Since I don't know what you have available to you, I'll describe how I get under my coach and you can determine if you can also do so.  I have a concrete surface and park my coach on 2 X 12s which raises the coach 1 1/2".  I then use the HWH leveling system to raise the coach all the way up.  I then crib the coach up using 8 X 8s that I cut to length--two fit under the trailer hitch and two under the front skid plates.  I then put HD jack stand under the square pads that are located behind the front & rear sway bars.  I can now safely go under the coach and perform every thing, including lubing the chassis and draining the air tanks.  

If you cannot get under your coach you are going to have to find some one competent to do it for you.  I would look for some one who services buses.  Being in Florida you should have some available to you.

I hope this is helpful......................................

Steve,
I can't locate the tank in R-1. But there are 2 large tanks that have petcocks, located in the center, just behind the front axle. I was going to crawl under and open them, but feel uncomfortable in doing so. Was afraid of it coming down somehow.
Can't locate desiccant filter either. All I see is wheel well.

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Chester, the dump port is where mine was leaking also.  Mine was caused from a bad dump valve where the internal seals were not doing their job. After I rebuilt the valve all was well.  But as Tom said there can be several things that cause this.  It just so happen this was my problem.  Most of the time the valves need rebuilding anyway so this is a good place to start.  The parts to rebuild the valve are inexpensive.

Where do I get the rebuild parts for the solenoids?