15
Note 1:
The FD-40X lens port uses 2 O-rings (one
Radial
O-ring and one
Compression
seal O-ring)
for a watertight seal. Radial O-rings are
affected by friction when closing the seal, as it rubs against a housing
wall. Therefore a radial O-ring, such as the O-ring on the port, requires
lubrication.
Note 2
Lubrication of an O-ring does not improve the seal. It only reduces the
amount of friction on the O-ring when it is being moved into sealing
position. The amount of lubrication required on the port O-ring is only
enough to allow it to slip into place without friction, so it does not twist or
become dislodged. More grease is not better, and could in some cases
have a negative affect if it is applied in large amounts to form a build-up
that could trap any debris or foreign matter.
Note 3
The Latching Buckles:
Provides water tight closure to the housing. The 3 Stainless Steel
buckles have a safety latch lock which should be manually pressed into
the locked position and then carefully checked to ensure that the buckle
cannot open by mistake during the dive. This can be checked by
physically trying to open the latch without depressing the lock release. If
the latch does open then you must try again to lock it down so it cannot
open.
Open Housing:
Release all three latches at same time, and lift off back half to open housing.
Inspect and clean main Gasket:
Use a clean wet cloth. Use only water to clean the gasket's sealing surface.
Do not remove the gasket unless there is evidence that there is a need to clean the underside
surface, or the channel it sits in.
If the gasket does need to be removed for cleaning or replacement, pull up on the Gasket
Tab to lift it out of its channel.
When replacing or changing gasket, begin by aligning the Gasket tab with its cutout slot in
the housing channel. Work the gasket down and into the channel around the full
circumference of the opening. Be sure it is completely seated in the channel for a proper seal.
Do not use any lubrication on this gasket. This is a Compression Seal gasket, which is not
affected by friction and does not require lubrication for proper sealing of the housing.
Attach the Zoom Control Guide Ring to the lens:
This is attached using the Velcro strip. Insure that the projected nub is directly on the bottom
when you wrap it around the lens.
The camera and tray are inserted in such a way that the nub of the Zoom Control Guide Ring
is sandwiched between the two projections found on the lens port of the housing. All are
pointed a downward direction. The Zoom Control is operated when camera is installed in
housing and button # 7 is moved in an upward or downward direction.
