TM 9-2330-287-14&P
BRAKE SYSTEM
Gladhands The gladhands are the coupling point for the trailer-to-towing vehicle. They are
marked, one for emergency and the other for service, to ensure correct hookup.
Airhoses The airhoses are attached to the gladhand on one end and to the trailer on the other.
Air Filters The air filters clean air from the towing vehicle of moisture and foreign matter.
Relay Valve The relay valve directs and controls the flow of air to and from the reservoir to the brake
air chamber.
Air Reservoir The air reservoir stores the system air pressure (60 psi (413.7 kPa) minimum) that
operates the brake system. Pressure to the reservoir is initially supplied and then maintained
through the emergency supply line from the towing vehicle through the relay valve.
TA224748
