I can't help you with the manual, but you might want to read this thread on taking care of it. 

Don

M1 A1 A2 Tanker

           Recently, pick up the above A/B cheap on Evilbay, but did not have instructions.

Does anyone know where I can get some? Or at least can tell me how the dial on the back works?

I have already figured out that turning that dial all the way left will cause that pin to stick out effectively closing of the paint flow.

Scott

I had an Aztek A4709 for about a month before I got rid of it. The printed manual is not very useful even if you can find one. Here is a Brent Green workshop at the Testors site that could be of some use. But don't try to hold the airbrush the way that Brent Green does. It is hopeless.

For cleaning and disassembly, this page at the howtoairbrush.com is very useful. Good luck, you will need it.