Dismantling and lubing Jupiter 9

[JOLILLO]

Hello I have a very nice example of Jupiter 9 in Kiev-Contax mount, but its focus ring is very stiff.
It is so stiff that when I try to turn it, at some point the force I need to aply to make it turning makes the locus lever on the lens jumping and the lens itself turns out of the mount.
I dismantled the rear part of the lens and arrived to the rear helix, and found that it is mostly dry, but remains some quantity of a very smelling, grey grease. I would like to remove that grease and relube the lens with a better lubricant.
Please guys guide me about what lubricant use, what special cares I must take (I was thinking using lighter fluid to remove the old grease, but I am afraid that the lighter fluid enter inside the lens through the joints and ruin the lens). Optically is an excellent example.
Thanks guys.

[Didier]

Have a look here.
Didier

[JOLILLO]

THANK YOU VERY MUCH DIDIER¡¡¡¡
It seems very helpfull. Mine is contax mount, but I hope will can follow the instructions.

[jmkelly]

Here is another resource, with pictures from other angles. Best of luck.

[Kim Coxon]

Hi,
The link Didier sent is for my website but is for the LTM version of the lens. I suspect the way it focusses is quite different.

Kim

[JOLILLO]

Yes Kim, you're right, but the second link, from John, is for a Kiev example and it is exactly what I was looking for. THANK YOU VERY MUCH TO ALL OF YOU¡¡¡¡

[Pherdinand]

Jolillo
you dont have to soak the lens in lighter fluid. Just moisten a cloth with solvent and wipe the gunk off the helicoid.
I had similar problem with my J-9.
Be CAREFUL when you put it together. It is easy to put it back misaligned and the focus will be off. In fact mine was reassembled in a way that it could not focus beyond 10m (according the distance scale, but actually when showed 10m and rf patch was aligned on 10m, the real focus was on infinity) so that's why i dismantled it, but it was not too difficult to do it.