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Revision A
Charging Battery
1000849
Figure 5.142: Battery Charging
CAUTION
•
Ventilate the area where the batteries are being charged.
•
Do NOT charge a frozen battery. Warm to 16°C (60°F) before
charging.
•
Do NOT connect or disconnect live circuits. To prevent
sparks, turn off the charger and connect the positive cable
first. PROTECT YOUR EYES.
•
If charging the battery in windrower, disconnect the
POSITIVE battery cable before connecting the charger cable,
then connect the ground cable last, away from the battery.
•
Stop or cut back the charging rate if the battery feels hot, or
is venting electrolyte. The battery temperature must NOT
exceed 52°C (125°F).
•
The maximum charge rate in amperes should be NO MORE
than 1/3 of the battery
’
s reserve capacity minute rating. If
the terminal voltage exceeds 16.0 volts while charging,
reduce the charge rate.
•
Continue charging and reduce the rate as needed until a
two-hour period results in no increase in voltage or
decrease in current.
Table 5.5 Voltage Chart
OCV
20
State of Charge
(%)
50 Amps
30 Amps
20 Amps
10 Amps
Approximate battery charging time (minutes)
to full charge at 27°C/80°F.
21
12.6
100
—
Fully charged
—
12.4
75
20
35
48
90
12.2
50
45
75
95
180
12.0
25
65
115
145
280
11.8
0
85
150
195
370
WARNING
•
Follow all battery manufacturers
’
instructions and precautions.
•
Gel and AGM (Absorbed Glass Mat) batteries require a voltage-limited charger. Charging a gel or AGM battery on a
typical shop charger
—
even one time
—
may greatly shorten its life.
•
If the electrolyte is accessible, verify that plates are covered before beginning to charge. At the end of charge, add
distilled water as needed to bring levels to the proper height. If water is added, charge for an additional 30 minutes
to mix. If the electrolyte levels are low, but the battery is not accessible, remove the battery from service.
20. Open circuit voltage with no charging/discharging for 8 hours or more.
21. Charging time depends on the battery capacity, condition, age, temperature, and the efficiency of the charger.
