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 TM 55-1905-220-14-4
3-57.1. AIR HORN - MAINTENANCE INSTRUCTIONS (CONT'D).
LOCATION
ITEM
ACTION
REMARKS
REMOVAL WHISTLE VALVE
WARNING
Turn off all electric power to compressor and drain air system
before attempting any work on air system.
CAUTION
3. Whistle
a. Valve cap (1)
Remove cap and
valve
spring (2).
Valve cap is under
spring tension.
Use caution while
removing.
b. Disc holder
Remove assembly
Disc holder assembly
assembly (3)
as a unit. Clean
(3) consists of nut,
area of exposed
hex, i" NF (4), disc
interior body.
holder (5), disc (6),
spindle (7), and
O-ring (8).
INSTALLATION
4. Whistle
a. Disc holder
Replace all
valve
assembly
elements of the
disc holder assembly
and insert into
valve body.
b. Valve cap
Install cap and spring
and spring
onto valve body.
Change 3
3-1014.3
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