TM 55-1930-209-14&P-11
4-12.2 Test. Check input voltage to horn located in ROWPU space or deckhouse mast. If input voltage is between 25
and 28 Vdc, replace horn as given in paragraph 4-12.3. If input voltage is not between 25 and 28 Vdc, check
connections and continuity of input cable (4P14A to ROWPU space horn or 1 P14C to deckhouse mast horn). Tighten
loose connections or repair or replace bad cable. If input cable to horn in ROWPU space is good, check alarm relay
module as given in paragraph 4-9. If input cable to horn on deckhouse mast is good, check bilge alarm module as given
in paragraph 4-10.
4-12.3 Replacement
4-12.3.1 Horn in ROWPU space on forward bulkhead (Barge 1) and on overhead (Barges 2 and 3)
a.
Removal
(1)
Tag and disconnect cable (4P14A)
(2)
Remove mounting hardware and remove horn.
b.
Installation
(1)
Install horn and secure with mounting hardware.
(2)
Connect cable to horn
4-12.3.2 Horn on deckhouse mast
a.
Removal
(1)
Remove 12 hex nuts and lock washers to free mast from foundation
(2)
Lay mast on deck
(3)
Tag and disconnect cable (1P14C)
(4)
Remove mounting hardware and remove horn.
b.
Installation
(1)
Install horn and secure with mounting hardware.
(2)
Connect cable to horn.
(3)
Stand up mast, align holes and studs, and secure mast with 1 hex nuts and lock washers 4-13 Strobe light
WARNING
Make sure main power switch Is off and circuit breaker 1 P14 or 4P14 is open (OFF) when
performing maintenance. Redtag switch with "WARNING DO NOT ACTIVATE. REPAIRS
BEING MADE."
4-13.1 Cleaning and inspection
a.
Wipe exterior clean with clean cloth and glass cleaner.
b.
Visually inspect for loose wire connections, corrosion, or damage. Clean corrosion and tighten loose
connections.
4-11
