Service manual

3. Maintenance 9-2013
3.7 Battery Maintenance
WARNING
Arcing at battery terminals or in light switches or other equipment, and flames or sparks, can
ignite battery gas causing severe personal injury—Ventilate battery area before working on or
near battery—Wear safety glasses—Do not smoke—Switch work light ON or OFF away from
battery—Stop the generator set—Disconnect the negative (-) battery cable first and reconnect it
last.
WARNING
Before working on the generator set, move the Switch (S2) to the Stop Position,
disconnect the remote harness (P7) to disable the ATS mounted charger, and remove
the negative (-) battery cable from the battery to prevent starting.
Refer to the Periodic Maintenance Table for scheduled battery maintenance, and follow the
battery manufacturer's instructions. Have the battery charger in the transfer switch replaced if
the battery keeps running down.
Always:
1. Keep the battery case and terminals clean and dry and the terminals tight.
2. Remove battery cables with a battery terminal puller. Torque threaded stud battery
terminals as recommended by the battery manufacturer.
3. Make sure which terminal is positive (+) and which is negative (-) before making battery
connections, always removing the negative (-) cable first and reconnecting it last to reduce
arcing.
NOTICE
If the battery needs to be replaced, be sure that the replacement battery specs match
those found in the Specifications Table in this manual.
3.8 Spark Plugs
WARNING
Before working on the generator set, move the Switch (S2) to the Stop Position, disconnect the
remote harness (P7) to disable the ATS mounted charger, and remove the negative (-) battery
cable from the battery to prevent starting.
Set the genset control to the Off position before checking the spark plugs.
Refer to the Periodic Maintenance Table for scheduled spark plug replacement.
The genset has two spark plugs: one on each side of the engine. The spark plugs must be in
good condition for proper engine starting and performance. A spark plug that fouls frequently or
has heavy soot deposits indicates the need for engine service.
To prevent cross threading a spark plug, always thread it in by hand until it seats. Torque the
spark plug to 15 lb-ft (20 N-m).
Return the genset control to Auto when finished performing maintenance.
16 A030A239 (Issue 10)