Starter Batteries - Kenworth Y53-1024 Operator's Manual

Electric Power System

Starter Batteries

The Starter Batteries (two 1000 Cold Cranking Amp 12-Volt batteries) are
located below the cab on the driver's side of the vehicle. These batteries
are used only to power the starter motor.
A DC/DC charger is located below the cab on the driver's side of the ve-
hicle. It serves to isolate the starting batteries from the main batteries and
provides charge to the starting batteries to maintain them at a minimum of
12-Volts.
NOTE: The DC/DC charger will only be activated
when either the truck is running or the truck is at-
tached to a 120-Volt AC electrical supply and the key
is in the IGN position.
Kenworth
low Voltage Disconnect
The electrical system is equipped with a low voltage disconnect feature
that will shut-down all non-essential electrical components if Main Battery
voltage drops below 11.0 -Volt. Three minutes prior to system disconnect an
audible warning in the Sleeper Control Panel will sound to give the operator
time to switch to an alternative power source or reduce loads. To reset the
system the Main Batteries must be charged until a system voltage of 13.2-
Volts or greater is reached. This can be accomplished by attaching to shore
power, starting the engine, or attaching a battery charger to the charging
terminals. Turning the ignition key to the ON position will not disable the Low
Voltage Disconnect.
Y53-1024 12/06 - 1 -