Nikon os Speedlight SB-102 - Manual (Page 5)

PREPARATION —continued
Examining and lubricating the 0-rings:
1. To remove the 0-rings, except those in the synchro
socket and sensor socket covers, grasp the ring be­
tween your thumb and forefinger. Pinch your fingers
together as you slide them in the direction of the
arrow to create slack in the 0-ring. Then grasp the
slack portion with your other hand and pull the ring
off (see Fig. 1).
To remove the 0-rings in the synchro socket and
sensor socket covers, use the edge of a credit card
or dive card or some thin, blunt, instrument. Never
use a knife or other sharp-edged object. Push up
on the center of the cover with a fingertip (or pointed
object), insert the card under the ring, and puli it up
to lift the 0-ring out (see Fig. 2). Do not scratch the
0-ring in the process.
2. Visually examine each 0-ring for imperfections. If
any 0-ring is damaged (by tears, cuts, or other im­
perfections), discard it immediately. If any 0-ring has
dirt, sand, hair, or foreign matter on it, rinse the 0-ring
in fresh water to remove it.
3. When lubricating the various parts of your flash unit,
use only the special non-water-soluble silicone
lubricant supplied with the speedlight. Never use
other lubricants (such as Vaseline) which are water-
soluble.
4. To lubricate the 0-rings, smear a small amount of the
special silicone lubricant on your fingertips and then
gently run each 0-ring between your fingertips.
Never use a brush or similar object to apply the lubri­
cant; small hairs may fall into the channel and allow
water to enter the flash unit. While lubricating each
0-ring, examine it with your fingertips for imperfec­
tions. If an 0-ring is properly lubricated, it will glisten
and will not have "gobs” of lubricant on it.
To ensure the longest possible flash unit life, apply
lubricant whenever necessary. Lubrication protects
the 0-rings from excessive wear; it also makes it
easier to attach or remove other parts.
5. Visually examine the channels into which the 0-rings
fit to determine that each is clean and smooth. If any
channel is dirty, clean it with a non-lint-bearing mate­
rial. Coat each channel with a thin film of lubricant
while being careful not to apply too much.
6. Reseat all of the 0-rings with your fingertips by insert­
ing one side of the ring into the channei and holding it
in position while rolling the other side of the ring into
piace (Fig. 3). To insert the 0-rings into the channels
of the synchro socket and sensor socket covers,
push up on the center of the cover with a fingertip
(or pointed object), piace the ring over the channel,
then press it down into place. Check that the 0-ring
is not twisted and that each of its edges is properly
seated (see Fig. 4).
7. Check the surfaces which are opposite the 0-rings
to determine that each is clean, smooth, and free of
foreign matter. Clean and lubricate the surfaces in
the same manner as the channels.
8. When reattaching the parts with 0-rings, be sure that
each 0-ring seats properly and securely. All of the
0-rings must be properly aligned and not “pinched."
V
Fig. 1 Fig. 2
Fig. 3 Fig. 4