Bizhub Pro 1050 How To open Drum Unit

[Masal]

Hi, I want to change drum in Bizhub Pro 1050
and I have a question, anyone knows how to pull out the drum unit?
I have 2 service manuals and there is nothing about sequence of replace Opc drum
I've read that is a sequence which need the right moment to release off the machine and pull out the drum easily .
Has anyone done this already I will be grateful for any suggestions .

[manuelcorrea]

Its in the service manual pages 38-41 or PDF pages 71-74