Nikon Ais lens repairs...

[Newt_on_Swings]

Lens need service so I don't think Nikon used Red Loctite. Nikon repairmans don't drill screwheads.
I found that thread locker is like Blue Loctite >>> medium strength ... > servisable.

Yup you are totally correct, I don't think any camera company uses such strong loctite, but some other people who aren't repairmen might unknowingly use it. I use blue loctite for many applications myself if I know that lens has screws that get loose easily through use or vibration, I actually don't even use the liquid, there is a new type of loctite thread tape that I cut a sliver off and wrap, less messy. I've repaired a few lenses where I had to chip off nail polish too. Sometimes only way is to drill on a botched up repair.

 

[Xmas]

Yup you are totally correct, I don't think any camera company uses such strong loctite, but some other people who aren't repairmen might unknowingly use it. I use blue loctite for many applications myself if I know that lens has screws that get loose easily through use or vibration, I actually don't even use the liquid, there is a new type of loctite thread tape that I cut a sliver off and wrap, less messy. I've repaired a few lenses where I had to chip off nail polish too. Sometimes only way is to drill on a botched up repair.

The rule book is to tighten the screw clean with nail varnish remover and paint on the nail varnish.
If you need to remove screw remove nail varnish first with nail varnish remover.
The infinity adjust screws on my E were so treated.
I use day glow so you can see it...

 

[camtec]

To remove stubborn screws, use a small hammer and rap on the screwdriver while trying to unscrew the screw. (2) Put hot soldering iron on screw to soften the adhesive holding the screw in. Actually, do number 2 before using hammer. Unscrew while the screw is hot.

 

[MartinCrabtree]

If you're going to use Loctite use 222 (purple) low strength. It's made for small stuff that doesn't see a lot of vibration. Use a small dot applied via toothpick for cleanest most efficient results.