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BATTERY
JX
Fig. 10 Volt-Ammeter Load Tester Connections
Open Circuit Volts
11.7 volts or less
12.0
12.2
12.4
12.6 or more
Fig. 11 Battery Open Circuit Voltage
SERVICE PROCEDURES
BATTERY CHARGING
A battery is considered fully charged when it will
meet all the following requirements.
• It has an open circuit voltage charge of at least
12.4 volts (Fig. 11).
• It passes the 15 second load test, refer to Bat-
tery Load Test Temperatures Chart above.
WARNING: DO NOT ASSIST BOOST OR CHARGE
A FROZEN BATTERY.
EXPLOSIVE GASES FORM OVER THE BATTERY,
DO
NOT
SMOKE,
SPARKS NEAR BATTERY.
CAUTION: Disconnect the battery NEGATIVE cable
first (Fig. 3) before charging battery to avoid dam-
age to electrical systems. Do not exceed 16.0 volts
while charging battery. Refer to the instructions
supplied with charging equipment
Battery electrolyte will bubble inside of battery
case while being charged properly. If the electrolyte
boils violently, or is discharged from the vent holes
while charging, immediately reduce charging rate or
turn off charger. Evaluate battery condition. Battery
damage may occur if charging is excessive.
Percent Charge
0%
25%
50%
75%
100%
USE
FLAME,
OR
Some battery chargers are equipped with polarity
sensing devices to protect the charger or battery from
being damaged if improperly connected. If the bat-
tery state of charge is too low for the polarity sensor
to detect, the sensor must be bypassed for charger to
operate. Refer to operating instructions provided
with battery charger being used.
CAUTION: Do not overcharge Battery refer to
Charging Rate Chart.
After the battery has been charged to 12.4 volts or
greater, perform a load test to determine cranking
capacity. Refer to Battery Load Test in this Group. If
the battery will endure a load test, return the bat-
tery to use. If battery will not endure a load test, it
must be replaced. Properly clean and inspect battery
hold downs, tray, terminals, cables, posts, and top
before completing service.
CHARGING COMPLETELY DISCHARGED BATTERY
The following procedure should be used to recharge
a completely discharged battery. Unless procedure is
properly followed, a good battery may be needlessly
replaced (Fig. 12).
Voltage
16.0 volts or more
14.0 to 15.9 volts
13.9 volts or less
(1) Measure the voltage at remote cable terminals
with a voltmeter accurate to 1/10 volt (Fig. 13). If
below 10 volts, charge current will be low, and it
could take some time before it accepts a current in
excess of a few milliamperes. Such low current may
not be detectable on amp meters built into many
chargers.
CREATE
Fig. 13 Voltmeter Accurate to 1/10 Volt (Connected)
BATTERY
Hours
up to 4 hrs.
up to 8 hrs.
up to 16 hrs.
Fig. 12 Charging Rate
8A - 7
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