
AIR BRAKES AND AUXILIARY RETARDERS 443
Warning
signal
Figure
26.1
Layout of
a
basic single-circuit air brake system
event of the system air pressure falling below a safe
working minimum, either a warning light or a buzzer is
automatically activated in the driving compartment.
The components of an air brake system are most
conveniently considered under the following headings:
Compression and storage
System control
System actuation.
26.2 COMPRESSION AND STORAGE
Air compressor
This generates a supply of compressed air to operate
the braking system and also the vehicle ancillary ser-
vices.
In modern installations it is usually mounted
on, and eithe ...