Valve Rocker Replacement

I need to change one of my valve rockers. I am having difficulty to remove the valve rocker shaft shown as No.8 on the attached parts file.
I will appreciate guidance on the removal and installation of these parts.

This requires the cam to be removed along with the camshaft caps.On this model the pin bolt at the end of the cap locks the shaft in place.
With all this removed the pin usually slides out
Regards Bif

Will do as you have described.
Many thanks for real expert help.