[rheavn]

John,
Six years ago I was where you are and people were patient with me.  No stupid questions.

You wrote, "Could water be the problem stopping my air door from not working? Is there a check valve near there to check out?"

I've never worked on my air doors, so I'm as inexperienced as you.  If I was having the problem, my first step would be to verify that the cylinder is receiving proper air pressure.  If it is, then I would look at the cylinder itself.  If it isn't, then I would work backwards toward the air pump.  I would not expect to find a check valve in the pocket door system.

"Should I install drains cocks with a pull cord?"

Strictly personal choice.  I do not have them.  I am under my coach regularly anyway.

"Can you also tell me the lubrication points and what type of grease? Is all this stuff in the manuals?"

The lubrication points are located in this thread-posting #2.  

http://newellgurus.com/showthread.php?tid=979

Yes some of this info is in the Newell owner's manual, including the type of grease.  Here is what I use:

http://www.tractorsupply.com/tsc/product...ease-14-oz