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TM 9-2330-272-14
1-7.
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS.
M131A4 AND M131A5 ROADSIDE
Key
Component
Description
1
Service Air Coupling
Connects towing vehicle service air supply to semitrailer.
2
Drain Plug
When removed, allows water or spilled fuel to drain from top of
semitrailer. Plugs must be installed at all times, except when washing
semitrailer.
3
Emergency Air Coupling
Connects towing vehicle emergency air supply to semitrailer.
4
Manhole Cover
Allows access to inside of tank. M131A4 is equipped with four.
M131A5 is equipped with two.
5
Catwalk
Nonskid surface on top of semitrailer.
6
Lights
Contain service, blackout, stoplight, and clearance marker lights on
early models and composite light and clearance marker lights on late
models.
7
Reflector
Marks outline of semitrailer.
8
Stowage Tube Assembly
Provides stowage for transfer hoses, ground rod, and petroleum gage
stick.
TA702619
1-3
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