Exmark NAV20KC, NAV27KC manual Service Interval Daily or more often in dry conditions

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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

Percent

Maximum

 

Charging Interval

Reading

Charge

Charger Settings

 

 

 

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

5.1.3Clean 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.

5.1.4Check 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.

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Contents For Serial Nos 510,000 & Higher Potential Hazard Exmark Parts PLUS→ Program Operators Manual Table of Contents Safety Alert Symbol SafetyYour Safety is Involved TrainingCarbon monoxide can kill you Potential Hazard Operation Safe Zone for Mowing Maintenance and Storage Potential Hazard Safety Signs HOT Fuel System SpecificationsEngine Electrical SystemOperator Controls Hydrostatic Ground Drive SystemUncrate Mower Service Battery Assembly InstructionsDimensions TiresCheck Tire Pressure Install Drive WheelsService Engine Controls Service Hydraulic OILOperation Instructions Push the lever forward and down to disengage the brake PRE-START Operating InstructionsPotential Hazard Hopper Screen Removal TransportingDisabling Hopper Auto Door Open Do not drive a unit on a public street or roadway Service Interval Daily Maintenance & AdjustmentsPeriodic Maintenance Service Interval MonthlyService Interval Daily or more often in dry conditions Service Interval 100 hrs Service Interval 40 hrs Lubrication ChartService Interval 40 hr Service Interval Refer to chartService Interval Once Yearly Service Interval 160 hrsService Interval 80 hrs Bushing Pivot LocationsService Interval As Required Service Interval After First 250 hrs Then yearly thereafterPTO Belt Routing AdjustmentsService Interval 500 hrs PTO Belt Replacement Belt Guide AdjustmentBrake Bolt Adjustment Throttle Tension Adjust steering levers Speed Control Lever AdjustmentTracking Adjustment Forward Stop Bolt AdjustmentSteering Control Lever Response Adjustment Drive Pulley AlignmentHopper Door Adjustment Door ClosingMotor OIL Disposal PTO Brake Spring AdjustmentWaste Disposal Mercury Switch Disposal Battery DisposalMower Cuts Unevenly Trouble ShootingMower Pulls Left or Right W/LEVERS Fully Forward Engine will not StartEngine Troubleshooting Table ProblemElectrical Diagram Hydraulic Diagram Year Limited Warranty Page See EXMARK’S Complete Line of Accessories