Service manual

6-40 Engine Electrical Engine
2006 LSSV Service Manual Supplement
Description and Operation
Battery Description (12V and 24V)
Caution: Batteries produce explosive gases.
Batteries contain corrosive acid. Batteries supply
levels of electrical current high enough to cause
burns. Therefore, in order to reduce the risk of
personal injury while working near a battery,
observe the following guidelines:
• Always shield your eyes.
• Avoid leaning over the battery whenever
possible.
• Do not expose the battery to open flames or
sparks.
• Do not allow battery acid to contact the eyes
or the skin.
• Flush any contacted areas with water
immediately and thoroughly.
• Get medical help.
The engine electrical options include the slave
receptacle, 24V generator, and a three-battery power
system. The two batteries in series provide 24V of
power. The 24V battery is located in the left front of the
engine compartment. This will provide greater power for
the higher load used by optional radio communications,
or for compatibility with other slave receptacles on
similarly equipped vehicles.
The LSSV vehicles are equipped with Optima batteries.
The Optima battery is a sealed, zero-maintenance
battery. Periodically inspect your battery terminal
connections to ensure they are clean, tighten to the
specified torque, and protected from the elements. The
Optima battery require a special charging procedure.
When charged properly you will not have to worry about
leaking, corrosion or gassing. Refer to Battery Charging
(Optima) procedure.
Battery Storage
Because of Optima’s high purity lead grid, it has a self
discharge rate much lower than conventional flat plate
batteries. This means the Optima can sit for longer
periods retaining enough charge to start your vehicle.
The vehicle load disconnect switch must be in the OFF
position anytime the expected vehicle storage time is to
exceed 48 hours.
When possible, store your battery in a cool, dry
location. Check the battery voltage every 6 months and
charge if it falls below 12.6 volts. If the vehicle is to be
stored for long periods you should use a maintenance
charger to compensate for this drain. This charger
should be voltage regulated between 13.2 – 13.8 volts,
1 amp maximum.
Charging System Description and
Operation
Charging
The Light Service Support Vehicle (LSSV) vehicles are
equipped with a 24V generator. The 24V generator’s
electronics are isolated from the chassis ground. The
24V configuration provides sufficient capacity and
reserve for 24V loads. Electrical loads can be
connected indefinitely while the engine is running, and
for a limited time when engine is OFF. The 24V battery
must be above 7 volts in order for the generator to turn
ON. The generator features permanently lubricated
bearings. Service should only include the tightening of
mounting components. Otherwise the generator is
replaced as a complete unit. The generator is rated at
41 amperes.
24V Voltmeter Gage
A voltmeter is installed to monitor the status of the 24V
battery and the 24V generator.
Voltage is available through a circuit of the 24V 10A
fuse. When the vehicle load disconnect switch is placed
in the ON position, voltage is applied to the 24V fuse
that provides voltage to the voltmeter. The voltmeter is
grounded through the I/P relay block. Color graduations
as viewed from the front of the meter from left to right
are as follows:
Minimum voltage to
activate the pointer
18.0 volts
Red/Yellow Break Point 22.0 volts
Yellow/Green Break
Point
26.0 volts
Small Hack Mark (in
green)
28.5 volts