Exmark NAV27KC, NAV20KC manual Service Interval As Required

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5.1.19Check spark plugs:

Service Interval: 160 hrs.

a)Remove spark plugs, check condition and reset gaps, or replace with new plugs. See Engine Owners Manual.

5.1.20Change fuel filter:

Service Interval: As Required

a)A fuel filter is installed between the fuel tank and the engine. Replace when necessary.

Replacement Filters

Kohler P/N 2405002

5.1.21Change hydraulic system filter:

Service Interval: After First 250 hrs.

Then yearly thereafter

NOTE: Use only Exmark Part No.109-0071 for summer use above 32° F (0°C) or Part No. 1-523541 for winter use below 32° F (0°C).

a)Stop engine, wait for all moving parts to stop, and remove key.

b)Carefully clean area around filter. It is important that no dirt or contamination enter hydraulic system.

c)Unscrew filter to remove and allow oil to drain from reservoir.

IMPORTANT: Before reinstalling new filter, fill it with Mobil 1 15W-50 and apply a thin coat of oil on the surface of the rubber seal.

Turn filter clockwise until rubber seal contacts the filter adapter, then tighten the filter an additional 2/3 to 3/4 turn.

d)Fill reservoir as stated in Section 5.1.8.

CAUTION

POTENTIAL HAZARD

Raising the mower deck for service or maintenance relying solely on mechanical or hydraulic jacks could be dangerous.

WHAT CAN HAPPEN

The mechanical or hydraulic jacks may not be enough support or may malfunction allowing the unit to fall, which could cause injury.

HOW TO AVOID THE HAZARD

DO NOT rely solely on mechanical or hydraulic jacks for support. Use adequate jack stands or equivalent support.

e)Raise the drive wheels off of the ground and support with jack stands (or equivalent support) just high enough to allow drive wheels to turn freely.

f)Start engine and move throttle control ahead to full throttle position. Move the speed control lever to the full speed and run for several minutes. Shut down machine and recheck oil level.

Do not change hydraulic system oil (except for what can be drained when changing filter), unless it is felt the oil has been contaminated or been extremely hot.

Changing oil unnecessarily could damage hydraulic system by introducing contaminates into the system.

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Contents For Serial Nos 510,000 & Higher Potential Hazard Exmark Parts PLUS→ Program Operators Manual Table of Contents Training SafetyYour Safety is Involved Safety Alert SymbolCarbon monoxide can kill you Potential Hazard Operation Safe Zone for Mowing Maintenance and Storage Potential Hazard Safety Signs HOT Electrical System SpecificationsEngine Fuel SystemHydrostatic Ground Drive System Operator ControlsTires Assembly InstructionsDimensions Uncrate Mower Service BatteryService Engine Install Drive WheelsCheck Tire Pressure Operation Instructions Service Hydraulic OILControls Push the lever forward and down to disengage the brake Operating Instructions PRE-STARTPotential Hazard Disabling Hopper Auto Door Open TransportingHopper Screen Removal Do not drive a unit on a public street or roadway Service Interval Monthly Maintenance & AdjustmentsPeriodic Maintenance Service Interval DailyService Interval Daily or more often in dry conditions Service Interval 100 hrs Service Interval Refer to chart Lubrication Chart Service Interval 40 hr Service Interval 40 hrsService Interval 160 hrs Service Interval Once YearlyBushing Pivot Locations Service Interval 80 hrsService Interval After First 250 hrs Then yearly thereafter Service Interval As RequiredService Interval 500 hrs AdjustmentsPTO Belt Routing Belt Guide Adjustment PTO Belt ReplacementBrake Bolt Adjustment Throttle Tension Speed Control Lever Adjustment Adjust steering leversForward Stop Bolt Adjustment Tracking AdjustmentDrive Pulley Alignment Steering Control Lever Response AdjustmentDoor Closing Hopper Door AdjustmentWaste Disposal PTO Brake Spring AdjustmentMotor OIL Disposal Battery Disposal Mercury Switch DisposalEngine will not Start Trouble ShootingMower Pulls Left or Right W/LEVERS Fully Forward Mower Cuts UnevenlyProblem Engine Troubleshooting TableElectrical Diagram Hydraulic Diagram Year Limited Warranty Page See EXMARK’S Complete Line of Accessories