ELECTRICAL
10.21
3. Reinstallbattery,attachingpositive(+)(red)cable
first and then the negative (-) (black) cable. Coat
terminals and bolt threads with Nyogelt Grease
(PN 2871329).
4. Reinstall the holder strap.
SEALED LOW MAINTENANCE
BATTERY
TESTING
Whenever a service complaint is related to either the
starti ng or charging systems, the battery should be
checked first.
Followingare threetestswhichcaneasilybemadeon
a battery to determine its condition: OCV Test,
Specific Gravity Test and Load Test.
SEALED LOW MAINTENANCE
BATTERY -- OCV -
OPEN
CIRCUIT VOLTAGE
TEST
Battery voltage should be checked with a digital
multitester. Readings of 12.8 volts or less require
further battery testing and charging. See charts and
Load Test.
NOTE: Lead-acid batteries should be kept at or near
a full charge as possible. If the battery is stored or
used in a partially charged condition, or with low
electrolyte levels, hard crystal sulfation will form on
the plates, reducing the efficiency and service life of
the battery.
NOTE: Use a voltmeter or multimeter to test batter
voltage.
OPEN CIRCUIT VOLTAGE
State of
charge
Maintenance
Free
Conventional
Lead / Acid
100%
75% Charged
50% Charged
25% Charged
0% Charged
13.0V
12.80V
12.50V
12.20V
less than 12.0V
12.70V
12.50V
12.20V
12.0V
less than 11.9V
*At80_F
NOTE: Subtract .01 from the specific gravity reading at 40_ F.
SEALED LOW MAINTENANCE
BATTERY LOAD
TEST
CAUTION: To prevent shock or component
damage, remove spark plug high tension leads
and connect securely to engine ground before
proceeding.
NOTE: Thistest canonly be performed on machines
with electric starters. This test cannot be performed
with an engine or starting system that is not working
properly.
Abatterymay indicateafullchargecondition in theOCV
test and the specific gravity test, but still may not have
the storage capacity necessary to properly function in
theelectricalsystem. For thisreason, a batterycapacity
or load testshouldbe conducted whenever poor battery
performance is encountered. To perform this test, hook
a multitester to the battery in the same manner as was
done in the OCV test. The reading should be 12.6volts
or greater. Engage the starter and observe the battery
voltage while cranking the engine. Continue the test for
15 seconds. During cranking the observed voltage
should not dropbelow 9.5 volts. If the beginningvoltage
is 12.6 volts or higher and the cranking voltage drops
below 9.5 volts during the test, replace the battery .
SEALED LOW MAINTENANCE
BATTERY
OFF--SEASON
ST
ORAGE
To prevent battery damage during extended periods
of non-use, the following basic battery maintenance
items must be performed:
GRemove the battery from the machine
and wash the case and battery tray
with a mild solution of baking soda
and water. Rinse with lots of fresh
water after cleaning.
GUsing a wirebrush or knife, removeany
corrosion from the cables and
terminals.
GCharge at a rate no greaterthan 1/10 of
the battery’s amp/hr capacity until
the voltage reaches 13.0 Vdc or
greater.
GStore the battery either in the machine
with the cables disconnected, or
store in a cool place.
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