Removal Instructions for the fuel tank? 1983 300SD Turbo Diesel

My Single Tank system is in route from Mercedes Source. However, I understand it would be best to start with a clean tank and screen. Just how do I go about removing the tank to get a radiator shop to clean it out for me. Kent, do you have any manuals on this? I see the socket you have available for the screen, but what about the tank. Any help is appreciated. Rick