I know it's been awhile since you put in this post, but I bought one of these CS9000 units back in early 90s when they just came out. I have the mannual for it as well, and there is a company that lets you download it as a PDF file.
The compressor is only 8PSI, but volume of air it moves is about 75 CFM (cubic feet per minute). It should have a filter on the front, but I have run mine for quite a while without it. I'm sure the CFM has suffered because of it. The gun is a nonbleeder type, and you clean it as you would any other gun. You can set the nozzle to either spray a fan or a round pattern. It has detents in the cap that you can feel as you rotate it (as I remember, by chaning it you change the direction of the fan and form a round pattern when setting it on the 45 degree angle setting). To clean it, it is just like any other gun. I recommend you put a little vasiline where the needle comes out of the trigger, and goes into the nozzle area (on the outside only) Also the side air control. When cleaning the control can be removed by taking off the clip, and when reassemblingI put a little vasiline on the o-rings as well to prevent air from leaking in and paint out. If you pull the trigger for a while, you'll notice it gets hot. That heat can be used to your advantage to increase the flowout of the paint. Sometimes I pull the trigger part way back to get the air flowing, and then as the handle heats up, I pull it the rest of the way. I have used mine for airplanes and custom motorcycle painting. I just started painting guitars, and am cranking my system up again.
