I like to check out the optical diagram to see if there are indeed glued elements, or some other less serious issue.
Wow, look at all those elements. This might not be a great lens for a first disassembly. I can see some grub screws just above the aperture ring. There might be some screws hidden under the focus grip. I can't tell whether this lens has the ring around the front element that unscrews through the filter threads.
Element separation is theoretically fixable. Just use a solvent to dissolve the old glue, clean the elements and reglue. Without leaving any air bubbles or variations in thickness. And aligned perfectly. With a glue that has great optical properties, never discolors with aging or UV, and is reversable for future repairs. I haven't tried it.