Exmark NAV20KC, NAV27KC manual Adjustments, Service Interval 500 hrs, PTO Belt Routing

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5.1.22Wheel Hub – slotted nut torque specification

Service Interval: 500 hrs

When tightening the slotted nut on the wheel motor tapered shaft:

a)Torque the slotted nut to 125 ft-lbs (169 N-m). NOTE: Do not use antisieze on wheel hub.

5.1.23Fuel Tank – mounting hardware specification

When installing the nuts on the fuel tank studs, fully tighten the nyloc nut and back off ½ turn. This allows for normal fuel tank expansion and contraction with changes in temperature and fuel levels.

5.1.24Thread locking adhesives such as “Loctite 242” or “Fel-Pro, Pro-Lock Nut Type” are used on the following fasteners:

a)Pump drive sheave set screws.

b)Square head setscrews on Hydro pump control arms.

c)Sheave retaining bolt in the end of engine crankshaft, blower shaft and jackshaft.

d)Caster wheel spacer nuts

e)Fuel tank bulkhead fitting nuts.

5.1.25Dielectric grease is used on blade type electrical connections to prevent corrosion and loss of contact. Do not apply grease to sealed connectors inside hopper.

5.2 ADJUSTMENTS

IMPORTANT: Disengage PTO, shut off engine, wait for all moving parts to stop, and remove key before servicing, cleaning, or making any adjustments to the unit.

5.2.1Pump Drive Belt Tension.

Spring Tensioned - No adjustment necessary.

5.2.2PTO Belt Replacement.

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

b)With engine “off”, engage PTO lever, then remove the hairpin and clevis pin at the bottom of the PTO brake band.

c)Rotate the brake band upwards out of the way of the belts keeping clear of the belt drive.

d)Disengage PTO lever.

e)Remove current belts.

f)Route new belts onto sheaves as shown in the decal located on the back of the left drive shield. See Figure 8.

FIGURE 8

PTO BELT ROUTING

g)Rotate brake band back down into original position.

h)Re-install clevis pin and hairpin to secure brake band.

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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 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 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 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 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