Mitsubishi FGC15K, Руководство по обслуживанию, Страница: 32 / 36

ELECTRICAL SYSTEM
3-8
Battery Maintenance
1. State of charge and electrolyte specific gravity adjustment
S.G.: specific gravity
Specific gravity reading
at 20°C (68°F)
State of charge Adjustment
1.280 to 1.265 Fully charged If difference in S.G. between any two cells is 0.020 or more,
effect a high current discharge to minimize the difference and
then recharge battery. Adjust S.G. during recharging.
1.260 to 1.225 One-half charged Recharge battery and adjust electrolyte S.G.. Make sure
there is neither faulty components, loosely connected cord
nor corroded connection.
1.220 or lower Discharged Recharge battery. If difference in S.G is large, adjust it
during recharging.
If difference in S.G.
is more than 0.040 A cell with a low S.G.
is in shorted condition.
Recharge until voltage
and S.G. stabilize and
have remained constant
for more than 2 hours. During recharging, adjust the S.G. to 1.280 and 1.265.
If difference in S.G. is more than 0.040 and a low S.G. is
found in certain cells only, replace battery.
2. Specific gravity reading and state of
charge
To check the battery for state of charge, take
hydrometer readings on its electrolyte. The battery
may be fully charged if the S.G. reading is 1.280 to
1.265 at 20°C (68°F). The state of charge can be told
from the way the electrolyte level goes down to expose
the cell plates. If addition of distilled water is
necessary every month or so, the battery is
overcharged. If addition is not required for more than 3
months, it is likely that the battery is inadequately
charged.
3. Charging precautions
(1) In slow charging, the charging current should be
about 1/10 the capacity of the battery to be
charged.
(2) In quick charging, the battery capacity in ampere
should not be exceeded.
(3) During charging, adjust the charging current to
prevent the electrolyte temperature from rising
beyond 45°C (113°F).
(4) When connecting the cables to the battery, begin
with the cable for the positive (+) terminal. When
disconnecting them from the battery, begin with the
cable for the negative (–) terminal.
Maintenance Free Battery
Maintenance Free Batteries do not require a specific
gravity check but the following checks are required to
extend the life of your battery:
(1) Visually inspect the battery for container, cover or
terminal damage that may have caused leakage of
electrolyte or internal damage. If serious damage is
found, replace the battery.
(2) Check the condition of the battery cables. Check for
corrosion on the battery terminals and cable
terminations. Make certain the ground cable is making
a good connection where it is grounded, and likewise,
check the connection of the cable to the starter relay
and/or solenoid. Replace badly corroded cables or
cables with defective terminations.
CAUTION
Be sure to turn OFF the starter switch and
lighting switch before disconnecting or
connecting the battery cables to prevent the
IC regulator from suffering damage.