
SEBU8219-01 83
Maintenance Section
Battery Electrolyte Level - Check
The battery cha
rger must not produce excessive
current during start-up. Alternatively, the charger
must be automatically disconnected for start-up.
If the engine h
as an alternator, the charger must
be automatically disconnected during start-up and
during engine operation.
Charging the Battery
Never disconnect any charging unit circuit or bat-
tery circuit cable from the battery when the charg-
ing unit is operated. A spark can cause an explo-
sion from the flammable vapor mixture of hy dro-
gen and oxygen that is released from the elec-
trolyte t hrough the battery outlets. Injury to per-
sonnel can be the result.
Perform the following procedure to charge the
battery:
1. Ensure that the charger is turned OFF.
2. Adjust the voltage of the charger in order to match
the voltage of the battery.
3. Connect the POSITIVE “+” lead of the charger
to the POSITIVE “+” battery terminal. Connect
the NEGATIVE “-” lead of the charger to the
NEGATIVE “-” battery terminal.
4. Turn ON the battery charger.
Overcharging of Batteries
Overcharging reduces the service life of batteries.
Use a battery charger that will not overcharge the
battery. DO NOT charge the battery if the meter of
the battery charger is in the RED zone.
Overcharging is indicated by the following symptoms:
•
The battery is very warm to the touch.
•
A strong odor of acid is present.
•
The battery emits smoke or a dense vapor (gas).
Perform one of the following procedures if the battery
shows symptoms of overcharging:
•
Reduce the rate of charging by a significant
amount. Complete the charging at the reduced
rate.
•
Turn OFF the charger.
Table 10 describes the effects of overcharging on
different types of batteries.
Table 1 0
Effects of Overcharging B atteries
Type of Battery Effect
All of the battery cells have
a low level of electrolyte.
When the plates of the
battery are inspected
through the filler holes, the
plates may appear to be
warped. This is caused by
an excessive temperature.
Caterpillar General Service
Batteries
Caterpillar Premium High
Output Batteries
The battery may not pass
aloadtest.
The battery may not accept
achargingcurrent.
Caterpillar Maintenance
Free Batteries
The battery may not pass
aloadtest.
Checking After Stopping
Ensure that th e battery charger is connected
properly. Observe the meter of the charger. Record
the amperage.
i02601752
Battery Electrolyte Level -
Check
SMCS Code: 1401-535-FLV
When the engine is not run for long periods of time or
when the engine is run for short periods, the batteries
may not fully recharge. Ensure a full charge in order
to help prevent the battery from freezing.
All lead-acid batteries contain sulfuric acid which
can burn the skin and clothing. Always wear a face
shield and protective clothing when working on or
near batteries.
1. Remove the filler caps. Maintain the electrolyte
level to the “FULL” mark on the ba ttery.
If the addition of water is necessary, use distilled
water. If distilled water is not available use clean
water that is low in minerals. Do not use artificially
softened water.