Only the cover where the spring is coming out. Take out the spring first and then with a screwdriver you have to pry the upper edge by inserting it little by little and prying it to release it all the way of the cover, Once the cover has been removed, from there the disassembly as the opposite cover must not be removed. Half will want to separate but does not give in to having a white plastic tongue on the part of the cylinder that you should light, Download the instructions here http://www.uninetimaging.com/downloads/technical/TecArtWebAdded/HP_Pro_M452_477_CF410A_Reman_ENG.pdf It is in English but the photos says it all.