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 (8) Replace clamps (9), and secure with
(2) Remove screws (25), lockwashers (24), and
lockwashers (11) and screws (12). Tighten screws carefully
clamps (1) that secure reflector (22) against pads (23) at rear
to produce even pressure on glass at all points.
of drum.
(9) Scrape excess lens cement off both sides of
(3) Lift defective reflector (22) out carefully to
door surface, and clean both sides of lens.
avoid damage to adjusting mechanism on lamp base.
(10) Install door on drum, replace hinge pins (2),
(4) If pads (23) are damaged, scrape them off
then secure door with clamps and thumbscrews.
and replace with new pads of same thickness.
Fasten new pads in place with shellac.
e. Maintenance and Adjustment.
(5) Carefully position new reflector on pads (23),
(1) Lubricate in accordance with LO 55-1925-204-
and secure with clamps (1), lockwashers (24), and screws
12.
(25).
(2) Keep electrical connections tight, and free of
corrosion.
NOTE
(3) If the lens fog, indicating presence of moisture
Tighten all screws gradually and
inside housing drum, open door and wipe all parts dry.
evenly to prevent strain on reflector.
Operate lamp with door opened slightly to permit warmed
Tighten screws only until the
moist air to escape. Continue operating lamp until interior of
reflector, when grasped with two
drum housing is completely dried, then close and fasten door.
hands along the edge, can be rotated
(4) Keep moving parts free from corrosion. Do
under the clamps.
not screw threads or bearing surfaces.
CAUTION
(5) Clean primary reflector and lens weekly with
Clamps must not be too tight, or
water and detergent applied with a soft cloth.
reflector breakage is possible due to
CAUTION
expansion from heat. Reflector must
Never use coarse or abrasive material
not be loose enough to permit
to clean searchlight reflectors.
movement due to normal vibration of
(6) To adjust the searchlight beam focus, proceed
the vessel.
as follows: (a) Loosen setscrews (6, fig. 5-132), and remove
(6) Install lamp in its base then close door.
secondary reflector (5).
d. Replacement of Lens. To replace a cracked or
(b) Project the searchlight beam on a
broken lens, proceed as follows:
vertical surface located 30 or 40 feet from the searchlight.
(1) Remove pins (2, fig. 5-132) from hinge, loosen
(c) Loosen knurled locknut (14).
thumbscrews (fig. 5-131) and move door clamps, then lift
(d) Move lamp socket assembly forward
door (8, fig. 5-132) off the drum.
and/or backward with adjusting knob (15) until the smallest
(2) Remove screws (12), lockwashers (11),
and most clear image of the filament is produced on vertical
clamps (9), and the damaged lens (3).
surface of target. Tighten knurled locknut (14) securely..
(3) Scrape old lens cement and cork pad out of
(e) Install the secondary reflector (5) on its
lens seating flange (10).
mounting, loosen two setscrews (7) and twist the reflector
(4) Apply a few drops of shellac on seating flange
sideways slightly until two spots of light appear on the target.
(10) of door frame, opposite the screw holes for lens clamps
The spots will not be of equal intensity, the weaker spot will be
(9).
caused by the secondary reflector.
(5) Press a new cork pad into place on shellac,
(f) Adjust the secondary reflector up or
and allow shellac to dry.
down until the centers of the spots are on the same horizontal
(6) After pad is seated, refill seating flange groove
line.
with cement and smooth to a thickness of approximately 1/16
(g) Move the secondary reflector to or from
inch.
the lamp until the two spots on target appear to be the same
(7) Lay a new lens on cemented pad and press
size. Twist the secondary reflector sideways until the spots on
down evenly and firmly.
target coincide, then tighten all setscrews.
Section Xlll. FIRE FIGHTING EQUIPMENT
5-105. General
5-106. Fire Fighting Equipment
The fire fighting system is described in paragraph 4-2a.
a. Portable Fire Fighting Equipment. The portable
Operation of the system appears in paragraph 2-19.
system consists of eight 15 pound and four 4 pound hand
Maintenance of the system appears in paragraph 5-106
extinguishers (fig. 5-133) positioned about the vessel.
below.
5-192
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