Quote Originally Posted by John Koehrer View Post
Not very complex? I suppose not from a parts count but.

There are six starting points with the helical and only one is correct. A little patience is needed but you may hit the right pair first time. Or not.
Or you could NOT do it the guesswork way (above) and take note of the orientation of the lens halves when you undo them (or mark a line with a pencil before you take it apart).

It's also easy to take lots of pics on a cellphone camera to help remember which bits goes where.
(You can lie out the screws next to the lens in the pattern you took them out).

Also, Naptha (or Ronsonol lighter fluid) is a very good grease/oil solvent.