Polaris 2007 Sportsman 450 EFI, Service Manual

Page: 380 / 406

10.62
ELECTRICAL
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 battery
voltage.
* Measurement at 80
°
F
NOTE: Subtract .01 from the specific gravity reading
at 40
°
F.
Low Maintenance Battery Load Test
NOTE: This test can only be performed on machines
with electric starters. Test cannot be performed with
an engine or starting system that is not working
properly.
A battery may indicate a full charge condition in the OCV test
and the specific gravity test, but still may not have the storage
capacity necessary to properly function in the electrical system.
For this reason, a battery capacity or load test should be
conducted whenever poor battery performance is encountered.
To perform this test:
1. Hook a multitester to the battery in the same manner as was
done in the OCV test. The reading should be 12.8 volts or
greater.
2. Engage the starter and observe the battery voltage while
cranking the engine. Continue the test for 15 seconds.
3. During cranking the observed voltage should not drop
below 9.5 volts.
4. If the beginning voltage is 12.8 volts or higher and the
cranking voltage drops below 9.5 volts during the test,
replace the battery.
Low Maintenance Battery Charging
Procedure
1. Remove the battery from the ATV to prevent damage from
leaking or spilled acid during charging.
2. Charge the battery with a variable rate charging output.
Charge as needed to raise the specific gravity to 1.270 or
greater.
3. Install battery in vehicle with positive terminal toward the
front. Coat threads of battery bolt with a corrosion resistant
Nyogel Grease (
PN 2871329 ).
4. Route cables so they are tucked away in front and behind
battery.
5. Connect battery cables.
6. Install cover on the battery and attach hold down strap.
Table 10-1: LOW MAINTENANCE BATTERY
CHARGING REFERENCE TABLE
S
TATE OF
C
HARGE
V
OLTAGE
A
CTION
C
HARGE
T
IME
100% 12.8-13 V
None, check
voltage at 3 mos.
after manufacture
date
None
Required
75-100% 12.5-12.8 V
May need slight
charge
3-6 Hours
50-75% 12.0-12.5 V Needs Charge 5-11 Hours
25-50% 11.5-12.0 V Needs Charge
At least 13
hours, verify
state of charge
0-25% 11.5 V or less Needs Charge
At least 20
hours
Table 10-1: OPEN CIRCUIT VOLTAGE
S
TATE OF
C
HARGE
L
OW
M
AINTENANCE
B
ATTERY
C
ONVENTIONAL
B
ATTERY
100 % 13.0V 12.70V
75% Charged 12.80V 12.50V
50% 12.50V 12.20V
25% 12.20V 12.0V
0% Charged less than 12.0V less than 11.9V
CAUTION
To prevent shock or component damage, remove
spark plug high tension leads and connect securely
to engine ground before proceeding.
WARNING
To avoid the possibility of sparks and explosion,
connect positive (red) cable first and negative
(black) cable last.