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PREPARATION-continued
Exam
in
ing and lubrica
ti
ng
the O
-r
ing
s:
1.
To
remove the O-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 O-ring.
Then
grasp the
slack portion with your other hand and pull the ring
off (see
Fig
.
1)
.
To
remove the O-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 pull
it
up
to
lift the O-ring out (see
Fig.
2).
Do
not scratch the
O-ring
in
the process.
2.
Visually examine each O-ring for imperfections.
If
any O-ring
is
damaged (by tears, cuts, or other im-
perfections), discard
it
immediately. If any O-ring has
dirt, sand, hair, or foreign matter
on
it
, rinse the O-ring
in
fresh water to remove
it.
3.
When
lubricating the various parts of your flash unit,
use on
ly
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 O-rings, smear a small amount of the
special silicone lubricant
on
your fingertips and then
gently
run
each O-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
O-ring, examine
it
with your fingertips for imperfec-
Fig. 3
-----------------------------------
tions. If
an
O-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 O-rings from excessive wear;
it
also makes
it
easier to attach or remove other parts.
5.
Visually examine the channels into which the O-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 O-rings with your fingertips
by
insert-
ing
one side of the ring into the channel and holding
it
in
pOSition
while rolling the other side of the ring into
place (Fig.
3)
.
To
insert the O-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), place the ring over the channel,
then press
it
down into place. Check that the O-ring
is
not twisted and that each of its edges
is
properly
seated (see
Fig.
4)
.
7. Check the surfaces which are opposite the O-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 O-rings,
be
sure that
each O-ring seats properly and securely.
All
of the
O-rings must
be
properly aligned
and
not "pinched."
Fig. 4
5