Tried to work on this last year, and failed to get it back together correctly and gave up, and reassembled it back together again without the aperture being able to be adjusted.
https://www.photrio.com/forum/threads/mating-tele-parts.145213/
Want to try again, but cannot find the pictures of my disassembly of it, nor the web page where we got the info to take it apart. Searched the net, and only found info for the Tokina on the PentaxForums.com. Its not the same lens.
So does anyone have some info on the repair of a Vivitar 400mm 5.6
Komine... or where we can find it.
Thanks p.