SC(H4SO)-20
STARTING/CHARGING SYSTEMS
Battery
• Be careful since the battery electrolyte over-
flows while charging the battery.
• Observe the instructions when handling bat-
tery charger.
• Before charging the battery on vehicle, dis-
connect battery ground terminal to prevent
damage of generator diodes or other electrical
units.
1. JUDGMENT OF BATTERY IN CHARGED
CONDITION
1) Specific gravity of electrolyte is held within the
specified range from 1.250 to 1.290 for more than
one hour.
2) Voltage per battery cell is held at the specified
range from 2.5 to 2.8 volts for more than one hour.
2. STATE OF CHARGE CHECK USING A
HYDROMETER
3. NORMAL CHARGING
Charge the battery at current value specified by
manufacturer or at approx. 1/10 of the battery’s am-
pere-hour rating.
4. QUICK CHARGING
Quick charging is a method in which the battery is
charged in a short period of time with a relatively
large current by using a quick charger.
Since a large current flow raises electrolyte temper-
ature, the battery is subject to damage if large cur-
rent is used for prolonged time. For this reason, the
quick charging must be carried out within a current
range that will not increase the electrolyte temper-
ature above 40°C (104°F).
It should be also remembered that the quick charg-
ing is a temporary means to bring battery voltage
up to a fair value and, as a rule, a battery should be
charged slowly with a low current.
CAUTION:
• Observe the items in 3. NORMAL CHARGING.
• Never use more than 10 amperes when
charging the battery because that will shorten
battery life.
Hydrometer
indicator
State of charge Corrective action
Green dot Above 65% Load test
Dark dot Below 65% Charge battery
Clear dot Low electrolyte
Replace battery*
(If cranking is difficult)
*: Check electrical system before replacement.
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