Exmark 4500-466 manual Wheel Hub Slotted Nut Torque Specification

Page 36

Maintenance

CAUTION

Raising the mower deck for service or maintenance relying solely on mechanical or hydraulic jacks could be dangerous. The mechanical or hydraulic jacks may not be enough support or may malfunction allowing the unit to fall, which could cause injury.

Do Not rely solely on mechanical or hydraulic jacks for support. Use adequate jack stands or equivalent support.

3.Remove the pump drive belt.

4.Place a catch pan under the hydro.

5.Carefully clean area around the filters. It is important that no dirt or contamination enter the hydraulic system.

6.Using a socket, unscrew filters to remove and allow oil to drain.

7.Before installing the new filters, apply a thin coat of Exmark Premium Hydro oil on the surface of the two rubber seals.

8.Install the new filters and torque to 14 ft-lb (19 N-m).

9.Fill the hydraulic system as stated in Check Hydraulic Oil Level section.

Exmark Premium Hydro Oil is recommended. Refer to the chart for an acceptable alternative:

Hydro Oil

Change Interval

Exmark Premium Hydro

500 Hours

Oil (Preferred)

 

Mobil 1 15W50

250 Hours

10.Remove the catch pan and properly dispose of hydro oil and filter according to local codes.

11.Re-install the pump drive belt.

12.Start engine and move throttle control ahead to full throttle position. Move the speed control levers to the full speed and run for one minute. Shut down the machine, allow the hydros to cool and recheck oil level.

13.Remove the jack stands.

Note: Do Not change the 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 contaminants into the system.

Wheel Hub - Slotted Nut Torque Specification

Service Interval: After the first 100 hours

Every 500 hours thereafter

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

1.Remove and discard the cotter pin.

2.Torque the slotted nut to 200 ft-lb (271 N-m).

3.Check distance from bottom of slot in nut to inside edge of hole. Two threads (0.1 inch) or less should be showing.

 

Figure 25

1. 0.1 inch max

2. No more than two

 

threads (0.1 inch max)

 

should be showing here.

4.If more than two threads (0.1 inch) are showing remove nut and install washer (P/N 1-523157) between hub and nut.

5.Torque the slotted nut to 200 ft-lb (271 N-m).

6.Then tighten nut until the next set of slots line up with the cross hole in shaft. Do Not loosen nut to align the slot. If required, tighten to the next set of slots.

7.Install new cotter pin (P/N 1-806800).

Note: Do Not use anti-seize on wheel hub.

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Contents
Lazer Z Advantage Series Models California Introduction Contents Safety Safety Alert SymbolSafe Operating Practices TrainingSafety Operation Using the Rollover Protection System Rops Slope OperationMaintenance and Storage Safety and Instructional Decals 109-3148 109-7232 109-8483 116-0211 Specifications Model NumbersSystems Operator Controls SeatHydrostatic Ground Drive System Tires & WheelsDimensions Overall WidthOverall Length Overall HeightCurb Weight Accessory Weight Table WorksheetTread Width Center to Center of Tires, Widthwise Wheel Base Center of Caster Tire to Center of Drive TireProduct Overview Torque RequirementsOperation ControlsIgnition Switch Hour MeterPTO Engagement Switch Low Voltage IndicatorFuel Shut-Off Valve Fuel GaugePre-Start Operating InstructionsDeck Lift Pedal Transport LockOpen the Fuel Shut-Off Valve Starting the EngineEngaging the PTO Disengaging the PTOStopping the Engine Driving the MachineAdjusting the Cutting Height Driving ForwardAdjusting the Anti-Scalp Rollers Transporting Transporting a UnitLoading a Unit Operation Maintenance Recommended Maintenance SchedulesCheck Battery Charge Check Engine Oil LevelCheck Safety Interlock System Check Mower Blades Service Air Cleaner Check Rollover Protections Systems Roll Bar Knobs Check Seat Belt Check for Loose HardwareChange Engine Oil Check Hydraulic Oil LevelCheck Tire Pressures Check Condition Of BeltsLubricate Grease Fittings Lubricate Caster Wheel HubsLubricate Brake Handle Pivot Lubricate Deck Lift PivotCheck Spark Plugs Change Fuel FilterWheel Hub Slotted Nut Torque Specification Check Engine Coolant Level Kawasaki Liquid-Cooled Only Change Engine Coolant Kawasaki Liquid-Cooled OnlyCheck Spark Arrester if equipped Thread Locking AdhesivesCopper-Based Anti-seize Dielectric GreaseAdjustments Deck LevelingRe-tighten front and rear height-of-cut plate mounting bolts Adjusting the Parking Brake Deck RemovalPump Drive Belt Tension Deck Belt TensionElectric Clutch Adjustment Motion Control Linkage AdjustmentMotion Control Damper Adjustment Motion Control Neutral Lock Pivot AdjustmentMotion Control Handle Adjustment Caster Pivot Bearings Pre-Load AdjustmentClean Engine and Exhaust System Area Remove Engine Shrouds and Clean Cooling FinsClean Hydro Fan Cooling Guards Clean Debris From Machine Clean Grass Build-Up Under DeckBattery Disposal Waste DisposalTroubleshooting Problem Possible Cause Corrective ActionRefer to Check Engine Coolant Level Schematics Electrical Diagram Air-CooledElectrical Diagram Liquid-Cooled TANElectrical Logic Schematic Air-Cooled Schematics Hydraulic Diagram Exmark Lazer Z and Lazer Z AS Turf Equipment Page Page Service Record Page Page See EXMARK’S Complete Line of Accessories and Options
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