Leupold FX-3 Owner's Manual page 38

Leupold scopes are sealed from within by several methods, including
o-rings . All seals are permanent and require no maintenance .
Leupold scopes are made of rugged 6061-T6 aircraft aluminum alloy .
38
No maintenance of any kind is required; simply wipe off any dirt or
fingerprints that accumulate with a clean, dry cloth .
PoWER SELECToR RINg
No lubrication is ever required on the power selector ring . Do
NoT LooSEN oR REMoVE THE HEX-HEAD SCREW IN THE PoWER
SEALS
SCoPE EXTERIoR
(oN VARIABLE PoWER SCoPES)
SELECToR RINg .
ADjUSTABLE oBjECTIVE/SIDE PARALLAX DIAL
No lubrication is required .
TRoUBLE SHooTINg TIPS
Before you ship a scope back to the factory for service or repair,
please check the following items .
1 . Check the mount . Make sure the scope is mounted securely to
the rifle . Try, with bare hands only, to gently twist the scope in
the rings or see if anything moves when you jiggle it . If there
is any movement, retighten the mounting system according to
mounting instructions .