help with Nikkor 8.5cm f2 disasembly?

[Darinwc]

I just received a nikkor 8.5cm. The focus is pretty stiff. Are these easy to service? Does anyone have pics of the process?
Thanks!

 

[ferider]

I only have CLA'ed LTM copies:

https://ferider.smugmug.com/Technical/Lenses/Nikkor-852-CLA