How do you i set injectors on cummins vt 903?

I have same engines in my boat, and I have to do it on both. It is not easy, so I have a workshop copy as I follow. You must turn the engine into spesial marks and control the pushdowns at total 4.75 mm at the injectors. Try to get the manual befor you start on this. I will like to know if you get it done and how. Thanks.