Exmark NAV20KC, NAV27KC manual Brake Bolt Adjustment

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5.2.5Adjust Seat Switch

a)If necessary, adjust the seat actuator rod length to where the machine will shut off when the operator raises off the seat (with brake disengaged or PTO engaged) but will continue to run with operator in seat (a slight shift in weight should not shut machine off).

NOTE: To prevent the engine from cutting out when operating over rough ground, the unit is equipped with a time-delayed seat switch. When the operator rises off the seat with either the brake disengaged or the PTO engaged, the engine should stop after 1/2 second has elapsed.

b)To adjust seat switch actuator rod length, loosen lock nut on bottom of the actuator rod (5/16 x 5 1/2” bolt) and adjust the nuts to move the actuator plate/washer up or down on the rod, then retighten.

5.2.6Brake Adjustment.

Check to make sure each brake is adjusted properly.

a)Pull the brake lever up and back to the engaged position.

b)A gap must exist between the bottom of the brake bolt head and the top surface of the brake swivel as shown in Figure 12. If a gap does not exist, adjust the linkage to a maximum gap of 0.5” ± 0.13” (1.3 cm ± 0.33 cm) as shown.

c)The brakes on both sides can be simultaneously adjusted by lengthening or shortening the linkage shown in Figure 12.

FIGURE 12

BRAKE BOLT ADJUSTMENT

d)If individual adjustment is necessary, loosen the jam nut on the brake bolt that is against the clevis connected to the brake arm on the wheel motor. Turn the brake bolt to achieve proper adjustment.

e)Tighten the jam nut against the clevis.

f)Repeat for other side of unit.

g)Engage and disengage the brakes to check for proper engagement and disengagement. Readjust if necessary. When the brakes are disengaged, there should be free play in the brake linkage with no dragging in the brakes.

5.2.7Adjust Throttle Lever Tension.

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

b)Tension in throttle lever can be adjusted by adjusting the tightness of the lever pivot bolt, which is located under the console. See Figure 13.

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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 TiresService Engine Install Drive WheelsCheck Tire Pressure Operation Instructions Service Hydraulic OILControls Push the lever forward and down to disengage the brake PRE-START Operating InstructionsPotential Hazard Disabling Hopper Auto Door Open TransportingHopper Screen Removal 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 thereafterService Interval 500 hrs AdjustmentsPTO 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 ClosingWaste Disposal PTO Brake Spring AdjustmentMotor OIL 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