Air Pressure Supply

[gilrami2]

I have 2008 GS Cresendo 330hp, we picked it up in March of 2010 and we really love it. It's the first class A we've had so some of these issues are new to me. I bought it from an indivual seller not a dealership, so I didn't get a full run down of all the RV and what type of regular maintenence that would be need or how or what fluids to check on a regular basis. So my first question is...is there and book, class or resource anyone can suggest on how to care for the RV?

I've also been trying to figure out why the PRI and SEC lights are coming on. I realize they are low pressure indicators, but not sure where to start trying to address or fix. This just started occurring.
Let me tell you what happens and then maybe someone can provide some advice...
When I dump the air and the rv sits for a period of time, when I come back to start it the lights come on and no pressure builds and obviously no brakes. It take about 20 before the pressure starts to build, but one it builds it okay. Is this something major or is this something that just needs some regular maintenence.

Thanks in advance for any advice.

[RayChez1]

Yea, that is too long before it starts building up pressure. Have you checked to see if you have any air blowing out anywhere such as your height leveling valves for your air ride. Or you might have a leak on an air bag. It might also be something in the compressor. I think if I was you I would take it to a Freightliner shop and tell them about your problem.
It shouldn't take more then two or three minutes to pump the air right up.