REPLACE - continued - TM-55-1905-219-14-90605

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REPLACE - continued

TM-55-1905-219-14-9 Landing Craft Utility (LCU) 1667 Class Boston Hull Numbers 1667-1670 NSN 1905-00-168-5764 Manual

REPLACE - continued

TM 55-1905-219-14-9

4.77.4. SEARCHLIGHT - DRUM ASSEMBLY - MAINTENANCE INSTRUCTIONS (Continued).

LOCATION

ITEM

ACTION

REMARKS

REPLACE (Cont)

d. Loose socket

Tighten.

clamps (10)

e. Lamp (11)

Pivot in other

socket until the

loose socket is

centered within

its confined free-

dom.

Socket

Tighten remaining

clamp (10)

clamp.

g. Lamp (11)

Focus.

Focus of the search-

light is fixed at

the time of manufac-

ture and under

ordinary conditions

should not be

changed. Focus can

be changed by loosen-

ing the three screws

(12) and moving the

entire lampholder on

adjustable support

(13) as required to

center the filament

of the lamp in the

axis of the reflec-

tor. Project the

light beam on a

screen or vertical

surface a minimum

distance of 55 feet

(16.8 m) away and

move the adjustable

base forward and

backward until the

smallest and

clearest image

of the filament

appears. Tighten

all screws.

4-1526