Exmark NAV27KC - Manual (Page 26)

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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
Percent
Charge
Maximum
Charger Settings
Charging Interval
12.6 or greater 100% 16 volts/7 amps No Charging Required
12.4 – 12.6 75 – 100% 16 volts/7 amps 30 Minutes
12.2 – 12.4 50 – 75% 16 volts/7 amps 1 Hour
12.0 – 12.2 25 – 50% 14.4 volts/4 amps 2 Hours
11.7 – 12.0 0 – 25% 14.4 volts/4 amps 3 Hours
11.7 or less 0% 14.4 volts/2 amps 6 Hours or More
5.1.3 Clean engine cooling system:
Service Interval: Daily or more often in dry conditions
CAUTION
POTENTIAL HAZARD
♦ Excessive debris can cause the engine and hydraulic
system to overheat.
WHAT CAN HAPPEN
♦ Excessive debris around the engine cooling air intake
and drive belts can create a fire hazard.
HOW TO AVOID THE HAZARD
♦ Clean all debris from around engine and drive belts
daily.
a) Stop engine, wait for all moving parts to stop, and remove key.
b) Clean all debris from rotating engine air intake screen and from around
engine shrouding.
c) Clean all debris from around engine and drive belts.
d) For 27HP Kohler units: Swing out the fuel tank and remove debris from
around the oil cooler positioned at right front corner of engine.
5.1.4 Check safety interlock system.
Service Interval: Daily
a) Check starting circuit. Starter should crank with, parking brake engaged,
PTO disengaged and speed control lever in the neutral position. The
operator does not need to be in the seat to start the engine.
Try to start with operator in seat, parking brake disengaged, PTO
disengaged and speed control lever in the neutral position - starter must
not crank.
Try to start with operator in seat, parking brake engaged, PTO engaged and
speed control lever in the neutral position - starter must not crank.
Try to start with operator in seat, parking brake engaged, PTO
disengaged, and the speed control lever forward (out of neutral) ,
starter must not crank.