Hi all,
I have a nikkor-h 18cm f2.5 lens which is in great condition except that the
focusing ring is stiff and takes more hand power than it should to rotate.

I want to disassemble it so I can clean and re-lube the threads. So far I have removed the barrel with the tripod adapter and the threaded focusing barrel which rotates inside of it.

I now need to remove the barrel that rotates the focusing barrel, the F stop barrel and presetting ring and don't know how it is done. Does anyone know how to do this or is there a document, manual or parts diagram that would help?
Henry Rancourt