TM 9-2330-359-14&P
1-7. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS.
M879A2 SHOWN
Key
Component
Description
1
12-volt Electrical
Connects semitrailer 12-volt electrical system to towing vehicle.
Receptacle (All Except
M872A1)
1
24-volt Electrical
Connects towing vehicle 24-volt electrical system, with voltage
Receptacle (M872A1)
reduction, to semitrailer 12-volt electrical system.
2
Nose Box
Contains light circuits and electrical and air connectors.
3
Switch
Activates semitrailer emergency flashers.
(All Except M872)
4
24-volt Electrical
Connects towing vehicle 24-volt electrical system, with voltage
Receptacle (All Except
reduction, to semitrailer 12-volt electrical system.
M872A1)
4
12-volt Electrical
Connects semitrailer 12-volt electrical system to towing vehicle,
Receptacle (M872A1)
5
Emergency Air Coupling
Connects to towing vehicle to provide emergency air supply.
6
Landing Legs
Support front of semitrailer when uncoupled from towing vehicle.
7
Handcrank
Operates landing gear legs.
8
Service Air Coupling
Connects to towing vehicle to provide service air supply.
9
Pamphlet Box
Provides stowage for semitrailer technical manual.
TA507974
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