REPLACEMENT - TM-55-1905-223-24-18-20831

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REPAIR

TM-55-1905-223-24-18-2 Landing Craft Utility (LCU) NSN 1905-01-154-1191 Basic Craft Part II Manual

FIGURE 4-12. Sensing Module Assembly (Sheet 1 of 2).

TM 55-1905-223-24-18-2

(5) Install barrel (12) by screwing barrel into inner optical block (13).

(6) Position terminal board (18) over support (14) with screw holes aligned.

(7) Install two machine screws (19) and secure terminal boards to support (14).

d. Side window.

(1) Install preformed packing (26) side window (25) light pad (33) and light spacer (32).

(2) Position preformed packing (29) and light detector cap (28) on housing (20).

(3) Install four machine screws (27) and secure light detector cap to housing.

e. Photo diode.

(1) Lower side window (31) preformed packing (30) and diode support (1) into housing.

(2) Lower photo diode (2) and wire leads into housing. Direct wire leads through housing and out

front end of sensing module assembly.

(3) Lower diode retainer (3) over photo diode (2).

(4) Install preformed packing (5) and screw retainer plug (7) into housing.

(5) Solder photo diode leads to terminals 5, 6 and 7 on terminal board (18). Remove tags.

(6) Install preformed packing (15) on sensor end cap (lb).

(7) Position sensor end cap over housing (20) with screw holes aligned.

(8) Install four machine screws (17) and secure sensor end cap to housing.

(9) Sensing module assembly replaced as specified in paragraph 3-33 .

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