TM 9-2330-231-14&P
BRAKE SYSTEM
Glad-hands - The glad-hands are the coupling point for the trailer brake system to towing vehicle.
They are marked, one for emergency and the other for service, to ensure correct hookup.
Airhoses - The airhoses connect the trailer brake system to the towing vehicle's.
Air Lines - The air lines connect trailer's airbrake system components together.
Air Filters - The air filter cleans towing vehicle air of moisture and foreign matter.
Relay Valve - The relay valve initiates a service or emergency stop based on signals received from the towing vehicle by
sending air reservoir pressure to the brake chamber.
Air Chamber - The air chamber uses air pressure to operate the master cylinder.
Air Reservoir - The air reservoir stores air from the towing vehicle to operate the trailer braking
system.
Master Cylinder - The hydraulic master cylinder converts the mechanical motion of the brake air
chamber to hydraulic pressure.
Hydraulic Brake Lines - The hydraulic brake lines transfer hydraulic pressure from the hydraulic
master cylinder to the wheel cylinders.
Wheel Cylinders - The wheel cylinders convert system hydraulic pressure to mechanical motion and force the brake lining
against the brakedrum.
Brakeshoes - The brakeshoes create friction against the brakedrum, slowing and stopping trailer.
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