-
PREPARATION-confinued---------
Examini
ng
and
lubricating
the
O-ri
ngs
1.
To
remove the O-rings, except the one around the
camera back, grasp the ring between 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 portion with
your other hand and pull the ring off (see
Fig.
1).
To
remove the O-ring around the camera back, use
the edge of a credit card or dive card or some
other thin,
blunt, instrument.
Never
use
a knife
or
other sharp-edged
ins
t
rument.
Insert the card
under the ring and pull 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
imperfections), 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 camera,
use
only
the
special
non-water
-
soluble
non-silicon
lubricant
supplied
with
the
came
ra_ Never use
other lubricants (such
as
Vaseline) which are water-
soluble.
4.
To
lubricate the O-rings, smear at small amount of
the special
non
-silicon lubricant
on
your fingertips
and then gently r
un
each O-ring between them.
Never use a brush or similar object
to
apply the
lubricant; small hairs may
fall
into the channel
and
8
allow water
to
enter the camera. While lubricating
each
O-ring, examine
it
with your fingertips for
imperfections.
If
an
O-ring
is
properly lubricated,
it
will glisten-and will not have "gobs" of lubricant
on
it.
To
ensure the
lo
nge
st
possible camera
li
fe,
apply
lubricant whenever necessary. Lubricantion protects
the
O-rings f
rom
excessive wear;
it
also makes the
camera back easy
to
open
and the lens or other
parts easy
to
attach.
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 material. Coat each channel with a thin film of
lubricant while being careful not to apply too much.
6.
Reseat
all
four O-rings with your fingertips
by
inserting one side of the ring into the channel and
holding
it
in
position while rolling the other side of
the ring
in
to place (see
Fig
.
3).
To
insert the O-ring
into the channel
in
the camera back, place the ring
over the groove and then press
it
down into place.
Check to s
ee
that the O-ring
is
not twisted a
nd
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 f
ree
of
foreign matter.
Clean and lubricate the surfaces
in
the same manner
as
the channels.
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