Exmark NAV20KC - Manual (Page 26)

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b) Check with engine cold.
c) Raise hopper.
d) Clean area around dipstick. Remove dipstick and wipe oil off. Reinsert the
dipstick and push it all the way down into the tube. Remove the dipstick and
read the oil level.
e) If the oil level is low, wipe off the area around the oil fill cap, remove cap and
fill to the “FULL” mark on the dipstick. Use oil as specified in Engine
Owner’s Manual. DO NOT
overfill.
IMPORTANT: DO NOT operate the engine with the oil level below the
“LOW” (or “ADD”) mark on the dipstick, or over the “FULL” mark.
4.1.2 Check battery charge:
Service Interval: Monthly
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
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
4.1.3 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.