As promised here are some technical shots of Narikaa's PO.
You need:
-Case back tool
-Putty
-Masking tape
-Grease
-Blower
-Thumbtack
-Fiberoptic cloth
-1 jeweler screw driver (not on the pic)
-Tweezer (not on the pic)
Remove the case back:
Movement shot:
Inside case back. Nice . . .
Remove the rotor (1 screw)
I removed some plastic 'hairs' from the movement spacer. If they would come loose later on they could cause some major problems.
Greased the ball bearings (special ball bearing grease not on the pic) to silence the rotor.
Clean the abundant grease with Rodico
Remove the stem/ crown by pushing the stem release button with a thumbtack GENTLY (whilst in the winding position). Than grease the seal inside the crown (seal 1)
Grease the seal in the tube (seal 2). It's kinda hard to see on the pic but it's the black thing inside the tube.
Decase the movement by simply turning the watch case (movement facing down) and pry out the white movement spacer. The movement will drop out, BE CAREFULL! More info on decasing the movement can be found HERE.
As you can see the c-clip in the HEV is almost impossible to reach. I think with just the right tool it could be done but I don't have it. I could try to remove it but I would run the risk of getting it off but never getting it back on okay.
As the HEV could be an entry point for water I do want to secure it. So I use some masking tape and cut out a hole.
I smear some special 'bathroom' rubber based putty in it.
I let it dry for 24h and clean it up.
I used my dustblower to remove all the dust inside the case, my fiberoptic cloth to get the inside of the crystal nice and clean and reassembled the whole thing.
Voila, a water proof tested PO good for swimming and diving
Hope this helps enjoying you POrikaa even more