As sunray says If all you want to do is remove the cylinder-crane assenmbly you only need to remove one screw.
The above works for filed stripping and cleaning of the cylinder-crane assembly. While the cylinder can also be separated form the crane, this is a more difficult proposition, as with some models you turn the ejector (that you push to eject) one way,and with earlier models the other way). I ususally only foeld strip as above and use a cleaning spray to flush out the inside of the cylinder axis, then lubricate.