Four 12-volt batteries connected in series-parallel supply the 12-volt electrical
system and provide 24 volts for the starter motor, blackout lights, accessories, and trailer
The Dual Voltage Alternator Control (DUVAC), mounted on the firewall in the
engine compartment, regulates the distribution of 12 and 24 volts.
The air system consists of the air compressor air dryer, air reservoirs, and various air
lines. Also included in the air system am the air pressure gages located on the dashboard
which are used for monitoring air pressure for safe operation of all air-operated components of