TP-7070 7/18 99Section 3 Scheduled Maintenance
3.11.7 Alternator Storage
Risk of fire.
Can cause severe injury or death.
WARNING
Combustible materials. A fire can cause severe injury or
death. If using generator heaters during storage, remove
combustible materials such as covers from contact with the
heater or from areas where heat could potentially cause a fire.
Humidity, moisture, and dust can damage the alternator
during storage. Store the generator set in a clean, dry
area and protect the alternator from inclement weather.
Keep room temperatures relatively constant to prevent
condensation on the windings. Cover ventilation and
other entry points to prevent damage by rodents, birds,
and insects.
For medium voltage generator sets (larger than 600
volts), store the units with the generator heater
operational and check periodically throughout the
storage period to confirm operation. To eliminate the
formation of condensation in the alternator winding,
maintain an AC alternator temperature above the
ambient dew point.
Before returning the alternator to service, have an
authorized service distributor/dealer, perform the
following alternator service:
D Clean the ventilation circuit.
D Blow dust off the windings.
D Check the rotor and stator winding insulation.
D Check the rotor and stator winding resistance and
continuity.
D On units with regreasable bearings, grease the
bearings and rotate the shaft to distribute grease on
the bearings.
3.11.8 Battery
Explosion.
Can cause severe injury or death.
Relays in the battery charger
cause arcs or sparks.
Locate the battery in a well-ventilated
area. Isolate the battery charger from
explosive fumes.
WARNING
Perform battery storage after all other storage
procedures.
1. Confirm that the generator set is stopped.
2. Disconnect the battery(ies), negative (--) lead first.
3. Clean the battery. Refer to Section 3.9.3 for the
battery cleaning procedure.
4. Place the battery in a cool, dry location.
5. Connect the battery to a battery charger or charge it
monthly with a trickle battery charger. Refer to the
battery charger manufacturer’s recommendations.
Maintain a full charge to extend battery life.
Note: If the battery is an absorbed glass mat
(AGM) type, ensure that the battery charger
is compatible with AGM type batteries
before charging.
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