Exmark 4500-645 manual Operation, With each tank change, Weekly, Tank Requalification

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Safety

The LPG tank should be free of dents or damage. If the tank show signs of dents or damage, replace it immediately.

Check the valve and fitting openings for dirt and debris.

Slowly open the valve all the way and listen for a continuous hiss from the regulator, it may indicate a leak.

LPG has a rotten egg or skunk smell added to it to help detect a gas leak. If you detect a gas leak:

Turn off the LPG valve if you can safely do so.

Leave the area.

Contact trained and qualified personnel immediately.

Do Not use if the hoses are abraded, damaged, kinked, or flattened.

Make sure the tank is securely mounted to the mower. If the tank is loose, the hose or fittings may leak.

With each tank change:

Check all gauges, fittings, and valves for damage.

Look for deterioration, damaged or missing o-rings on tank connection fitting.

Inspect the LPG tank and the fuel connection joint for leaks. Use the following procedure below to detect leaks:

Apply an approved leak detector solution, obtained from a trained and qualified LPG distributor, or a thick non-ammonia soapy water solution (50% non-ammonia soap and 50% water). (A leak detector solution that contains ammonia will cause the fittings to corrode and leak.)

Using a small brush or spray bottle, apply the solution around all the fittings of the LPG tank and the fuel connection joint.

Slowly open the gas valve a half-turn.

If bubbles are detected, the joint or fitting has a leak. Shut off the valve, tighten the leaking connection, and slowly open the valve again. If bubbles still appear, Do Not use the tank. If it is safe to do

so, remove the tank from your mower; otherwise, contact trained and qualified personnel immediately.

If no bubbles are detected, the LPG tank may be used.

Weekly:

Check the entire LPG fuel delivery system for damage or deterioration.

Check the entire LPG fuel delivery system for leaks at all joints using the same method as described in the previous section.

Follow all the inspection checks as specified in the two previous inspection sections.

Tank Requalification:

USDOT (United States Department of Transportation) regulations require LPG tanks to be inspected, requalified, and marked within 12 years of the manufacture date and on a regular basis thereafter. Typically this occurs when the tank is refilled; contact a trained and qualified LPG tank provider for more details.

Do Not fill the LPG tank if it is beyond the requalification period.

Do Not fill damaged or rusted LPG tanks.

Operation

WARNING

Operating engine parts, especially the muffler, become extremely hot. Severe burns can occur on contact and debris, such as leaves, grass, brush, etc. can catch fire.

Allow engine parts, especially the muffler, to cool before touching.

Remove accumulated debris from muffler and engine area.

Install and maintain in working order a spark arrester before using equipment on forest-covered, grass-covered, or brush-covered unimproved land.

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Contents Lazer Z LPG Models All Rights Reserved Introduction Contents Safety Safety Alert Symbol Safe Operating Practices TrainingDo Not change the tanks when the engine is running Inspection Operation With each tank changeWeekly Tank RequalificationSlope 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 Systems SpecificationsModel Numbers Seat Hydrostatic Ground Drive SystemDimensions Curb 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 ControlsMotion Control Levers Brake LeverIgnition Switch Safety Pressure Relief ValveHour Meter Fuel ValvePTO Engagement Switch Low Voltage IndicatorLPG Cylinder Brackets Drive Wheel Release ValvesRaise the Rollover Protection System Rops Pre-StartOperating Instructions Open the Fuel Valve Starting the EngineEngaging the PTO Disengaging the PTODriving the Machine Driving ForwardDriving in Reverse Adjusting the Cutting HeightAdjusting the Anti-Scalp Rollers Do Not drive a unit on a public street or roadway TransportingTransporting a Unit Loading a Unit Operation Maintenance Recommended Maintenance SchedulesProposition 65 Warning Check Battery ChargeCheck Engine Oil Level Recommended Jump Starting Procedure Do Not jump start a weak battery if these conditions existCheck Mower Blades Check Safety Interlock System Check Rollover Protections Systems Roll Bar KnobsService Air Cleaner Check Seat BeltCheck for Loose Hardware Change Engine OilCheck Tire Pressures Check Condition Of BeltsLubricate Grease Fittings Lubricate Caster Wheel HubsLubricate Brake Handle Pivot Lubricate Deck Lift PivotCheck Spark Plugs Check LPG TankChange LPG Tank Change Hydraulic System Filter and FluidWheel Hub Slotted Nut Torque Specification Thread Locking AdhesivesCopper-Based Anti-seize Dielectric GreaseAdjustments Deck LevelingPump Drive Belt Tension Adjusting the Parking Brake Deck Belt TensionElectric Clutch Adjustment Removing the Shim Motion Control Linkage Adjustment Motion Control Damper Adjustment Motion Control Neutral Lock Pivot AdjustmentMotion Control Handle Adjustment Adjusting the heightCaster Pivot Bearings Pre-Load Adjustment Adjusting the TiltClean Engine and Exhaust System Area Remove Engine Shrouds and Clean Cooling FinsClean Hydro Fan Cooling Fins Clean Debris From MachineMotor Oil Disposal Battery DisposalWaste Disposal Troubleshooting Problem Possible Cause Corrective ActionSee Drive Wheel Release Valves section Troubleshooting Schematics DiagramSchematic ElectricalHydraulic Diagram General Warranty Conditions and Products Covered Page Service Record Date Description of Work Done Service Done ByPage This page may be copied for personal use See EXMARK’S Complete Line of Accessories and Options