Exmark Turf ranger Operator's Manual page 29

Allowing batteries to stand for an extended period of time without recharging
them will result in reduced performance and service life. To preserve
optimum battery performance and life, recharge batteries in storage when
the open circuit voltage drops to 12.4 volts.
Note: To prevent damage due to freezing, battery should be fully charged
before putting away for winter storage.
a) Check the voltage of the battery with a digital voltmeter. Locate the voltage
reading of the battery in the table below and charge the battery for the
recommended time interval to bring the charge up to a full charge of 12.6
volts or greater.
IMPORTANT: Make sure the negative battery cables are disconnected
and the battery charger used for charging the battery has an output of 16
volts and 7 amps or less to avoid damaging the battery (see chart below for
recommended charger settings).
Voltage
Reading
12.6 or greater
12.4 – 12.6
12.2 – 12.4
12.0 – 12.2
11.7 – 12.0
11.7 or less
For Serial Nos. 251,999 and Lower:
Check battery electrolyte level:
Service Interval: 40 hrs.
a) Stop engine and remove ignition key.
b) Remove battery cover.
c) Remove vent caps from battery. If needed, fill with water (distilled is
recommended) to bottom of vent wells and replace vent caps.
d) See Section 3.2 (Assembly) for servicing a new battery.
6.1.12 Inspect Belt Wear:
Service Interval: 40 hrs.
a) Stop engine, wait for all moving parts to stop, and remove key.
b) Remove the three mower deck belt shields to check mower primary and
secondary belt condition.
c) Look under engine deck to check the transmission drive belt condition.
d) Check all idler arms to be sure they pivot freely.
Note: Be sure to check idler on transmission drive belt. Disassemble, clean and
grease pivot bushing if necessary.
6.1.13 Lubricate grease fittings.
a) Stop engine, wait for all moving parts to stop, and remove key.
b) Lubricate fittings with one to two pumps NGLI grade #2 multi-purpose gun
grease. Refer to the following chart for fitting locations and lubrication schedule.
Percent Maximum
Charge Charger Settings
100% 16 volts/7 amps
75 – 100% 16 volts/7 amps
50 – 75% 16 volts/7 amps
25 – 50% 14.4 volts/4 amps
0 – 25% 14.4 volts/4 amps
0% 14.4 volts/2 amps
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Charging Interval
No Charging Required
30 Minutes
1 Hour
2 Hours
3 Hours
6 Hours or More