Exmark 4500-645 Open the Fuel Valve, Starting the Engine, Engaging the PTO, Disengaging the PTO

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Operation

that the rear part of the seat is secured with the seat latch.

Open the Fuel Valve

1.Slowly open the fuel valve to equalize the pressure in the tank. The fuel valve is located on the top end of the LPG tank. If the fuel valve is opened too quickly, the pressure relief valve is equipped with a back pressure check valve that will shut off the fuel supply. If this happens, close the fuel valve completely and wait five seconds. Slowly open the fuel valve.

2.Rotate the fuel valve counterclockwise to turn on the fuel. If leaks are detected, refer to the leak information in the Inspection section in Safety.

Starting the Engine

1.Move the motion control levers out to the neutral lock position.

2.Pull up and back on the parking brake lever to engage the parking brake.

3.Push in on the PTO switch to the “STOP” position.

Note: It is not necessary for the operator to be in the seat to start the engine.

4.Place the throttle in the “SLOW” position.

5.Turn ignition switch to the “START” position. Release the switch as soon as the engine starts.

Important: Do Not crank the engine continuously for more than ten seconds at a time. If the engine does not start, allow a 60 second cool-down period between starting attempts. Failure to follow these guidelines can burn out the starter motor.

Engaging the PTO

DANGER

The rotating blades under the mower deck are dangerous. Blade contact can cause serious injury or kill you.

Do Not put hands or feet under the mower or mower deck when the blades are engaged.

DANGER

An uncovered discharge opening will allow objects to be thrown in an operator’s or bystander’s direction. Also, contact with the blade could occur. Thrown objects or blade contact can cause serious injury or death.

Never operate the mower with the discharge deflector raised, removed, or altered unless there is a grass collection system or mulch kit in place and working properly.

The PTO push-pull switch engages the cutting blades. Be sure that all persons are clear of the mower deck and discharge area before engaging PTO.

Important: Operator must be in seat before the PTO can be engaged.

1.Set the throttle midway between the “SLOW” and “FAST” positions.

2.Pull the PTO switch outward to engage the blades.

3.Place the throttle in the “FAST” position to begin mowing.

Disengaging the PTO

1.Set the throttle midway between the “SLOW” and “FAST” positions.

2.Push the PTO switch in to disengage the blades.

Stopping the Engine

1.Bring the unit to a full stop.

2.Disengage the PTO.

3.Move the motion control levers out to the neutral lock position.

4.Engage the parking brake.

5.Place the throttle in the “SLOW” position.

6.Turn off the fuel valve and allow the engine to run out of fuel. Failure to do this may cause the engine to “flood” when re-starting.

7.Turn the ignition switch to the “OFF” position once the engine has stopped.

8.Remove the key to prevent children or other unauthorized persons from starting engine.

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Contents Lazer Z LPG Models All Rights Reserved Introduction Contents Training SafetySafety Alert Symbol Safe Operating PracticesDo Not change the tanks when the engine is running Inspection Tank Requalification OperationWith each tank change WeeklySlope Operation Using the Rollover Protection System Rops Maintenance and Storage Safety Safety and Instructional Decals 109-3148 109-7232 116-0157 116-0752 109-7069 109-9906 Specifications Model NumbersSystems Hydrostatic Ground Drive System SeatDimensions Wheel Base Center of Caster Tire to Center of Drive Tire Curb WeightAccessory Weight Table Worksheet Tread Width Center to Center of Tires, WidthwiseTorque Requirements Product OverviewBrake Lever OperationControls Motion Control LeversFuel Valve Ignition SwitchSafety Pressure Relief Valve Hour MeterDrive Wheel Release Valves PTO Engagement SwitchLow Voltage Indicator LPG Cylinder BracketsPre-Start Operating InstructionsRaise the Rollover Protection System Rops Disengaging the PTO Open the Fuel ValveStarting the Engine Engaging the PTODriving Forward Driving the MachineAdjusting the Cutting Height Adjusting the Anti-Scalp RollersDriving in Reverse Transporting Transporting a UnitDo Not drive a unit on a public street or roadway Loading a Unit Operation Recommended Maintenance Schedules MaintenanceCheck Battery Charge Check Engine Oil LevelProposition 65 Warning Do Not jump start a weak battery if these conditions exist Recommended Jump Starting ProcedureCheck Mower Blades Check Rollover Protections Systems Roll Bar Knobs Check Safety Interlock SystemChange Engine Oil Service Air CleanerCheck Seat Belt Check for Loose HardwareLubricate Caster Wheel Hubs Check Tire PressuresCheck Condition Of Belts Lubricate Grease FittingsCheck LPG Tank Lubricate Brake Handle PivotLubricate Deck Lift Pivot Check Spark PlugsChange Hydraulic System Filter and Fluid Change LPG TankDielectric Grease Wheel Hub Slotted Nut Torque SpecificationThread Locking Adhesives Copper-Based Anti-seizeDeck Leveling AdjustmentsPump Drive Belt Tension Deck Belt Tension Adjusting the Parking BrakeElectric Clutch Adjustment Removing the Shim Motion Control Linkage Adjustment Adjusting the height Motion Control Damper AdjustmentMotion Control Neutral Lock Pivot Adjustment Motion Control Handle AdjustmentAdjusting the Tilt Caster Pivot Bearings Pre-Load AdjustmentClean Debris From Machine Clean Engine and Exhaust System AreaRemove Engine Shrouds and Clean Cooling Fins Clean Hydro Fan Cooling FinsBattery Disposal Waste DisposalMotor Oil Disposal Problem Possible Cause Corrective Action TroubleshootingSee Drive Wheel Release Valves section Troubleshooting Diagram SchematicsElectrical SchematicHydraulic Diagram General Warranty Conditions and Products Covered Page Date Description of Work Done Service Done By Service RecordPage This page may be copied for personal use See EXMARK’S Complete Line of Accessories and Options