Exmark NAV20KC, NAV27KC manual Adjust steering levers, Speed Control Lever Adjustment

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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.

Adjust steering levers:

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

b)Pull the speed control lever completely back to the neutral position. The two steering levers should be straight up and down (vertical). If necessary, adjust steering levers by changing the length of the link between the speed control lever and the control arm on the end of the steering control shaft. See Figure 15.

FIGURE 15

SPEED CONTROL LEVER ADJUSTMENT

Set neutral:

a)Remove the electrical connection from the seat safety switch, located directly in front of the seat switch assembly.

b)The neutral adjustment must be made with the drive wheels turning. Raise the frame and place on jack stands so that drive wheels can rotate freely.

Temporarily install a jumper wire across the terminals in the connector of the wiring harness.

c)Start the engine.

d)Run the unit at least 5 minutes with the drive levers at full forward speed to bring hydraulic system oil up to operating temperature.

e)To obtain the neutral position, adjust the left and right pump control rod linkages that connect the steering control to the pump control arms until the wheels stop, or creep slightly in reverse.

f)Adjust the left pump linkage by rotating the tracking adjustment knob.

g)Adjust the right pump linkage by using a wrench to turn the double nuts on the assembly. See Figure 16.

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Contents For Serial Nos 510,000 & Higher Potential Hazard Exmark Parts PLUS→ Program Operators Manual Table of Contents Safety Your Safety is InvolvedSafety Alert Symbol TrainingCarbon monoxide can kill you Potential Hazard Operation Safe Zone for Mowing Maintenance and Storage Potential Hazard Safety Signs HOT Specifications EngineFuel System Electrical SystemOperator Controls Hydrostatic Ground Drive SystemAssembly Instructions DimensionsUncrate Mower Service Battery TiresInstall Drive Wheels Service EngineCheck Tire Pressure Service Hydraulic OIL Operation InstructionsControls Push the lever forward and down to disengage the brake PRE-START Operating InstructionsPotential Hazard Transporting Disabling Hopper Auto Door OpenHopper Screen Removal Do not drive a unit on a public street or roadway Maintenance & Adjustments Periodic MaintenanceService Interval Daily Service Interval MonthlyService Interval Daily or more often in dry conditions Service Interval 100 hrs Lubrication Chart Service Interval 40 hrService Interval 40 hrs 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 thereafterAdjustments Service Interval 500 hrsPTO Belt Routing 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 ClosingPTO Brake Spring Adjustment Waste DisposalMotor OIL Disposal Mercury Switch Disposal Battery DisposalTrouble Shooting Mower Pulls Left or Right W/LEVERS Fully ForwardMower Cuts Unevenly Engine will not StartEngine Troubleshooting Table ProblemElectrical Diagram Hydraulic Diagram Year Limited Warranty Page See EXMARK’S Complete Line of Accessories