1-12. ELECTRICAL SYSTEM (Con't).
Convoy Warning Light
Housing for female receptacle into which convoy warning light is
plugged when light is in use.
Covers female receptacle when not in use. Attached retaining
chain prevents loss of cap.
12 Female Receptacle
Threads into convoy warning light condulet. Contains recessed
female contacts for safety and protection.
I Metal tubing protects convoy warning light wires from damage.
1-13. BRAKE SYSTEM.
Air pressure generated by tractor's compressor is sent through intervehicular air
couplings (EMERGENCY and SERVICE), a series of air lines, connectors, and valves to
a forward and rear air reservoir where it is stored until needed to actuate brakes at
Axle-mounted brake chambers receive air pressure from air reservoirs when service
brakes are applied. Compressed air is converted inside brake chambers to
mechanical energy which travels from brake chamber pushrod through a series of
mechanical linkages to axle-mounted brake components.
Cam-actuated brake shoes are forced against drums to stop semitrailer.
If a planned or emergency loss of air pressure occurs, a large, powerful spring inside
rear chamber of each brake chamber releases to apply semitrailer parking/
A brake interlock system, mounted on piping assembly front port and rear inlet,
provides for automatic setting of semitrailer parking/emergency brakes during fuel
bottom loading and unloading.