Husqvarna 4421-D/DX/DXL, 4421-G/GX/GXL Draining Water from Fuel Filter, Diesel Vehicles Only

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Fueling Instructions

Biodiesel is an excellent medium for microbial growth and contamination. Microbial contamination can cause corrosion of the fuel system and prematurely plugged fuel filters. See following NOTE.

NOTE: Use of biodiesel may result in premature failure of fuel system components. Kubota has documented problems such as plugged fuel filters and deteriorated fuel lines during testing of biodiesel.

Biodiesel can damage painted surfaces. Be sure to remove all spilled fuel immediately to help prevent damage to painted surfaces.

If biodiesel will be used in the Kubota D722 engine, be sure that it meets the following requirements:

•The fuel blend should contain no more than 5% biodiesel by volume.

•The petroleum portion of the fuel blend must meet ASTM standard D975 and the biodiesel portion of the fuel blend must meet ASTM standard D6751.

•For Europe, the fuel blend must meet the EN590 standard. See following CAUTION.

CAUTION

•Never use any fuel that does not meet specifications or fuel in which the contents cannot be identified. Using blends higher than 5% biodiesel content can affect engine life and cause deterioration of hoses, tube lines, injectors, injector pump and seals.

•For more information on these fuel standards, please contact your nearest Kubota dealer.

If biodiesel is used, be sure to apply the following guidelines:

•Ensure the fuel tank is as full as possible at all times to prevent moisture from collecting.

•Ensure that the fuel tank cap is securely tightened to prevent water from entering the fuel tank.

•Drain all water from the fuel filter daily before operating vehicle. See Draining Water from Fuel Filter.

•Check the engine oil level daily before the engine is started. See Engine Oil Level Check on page 39.

•Before vehicle storage, run the engine with conventional diesel fuel for at least 30 minutes to flush the biodiesel from the engine. See Preparing the Vehicle for Extended Storage on page 31. See following NOTE.

NOTE: Biodiesel does not have long-term stability and must not be left in engines longer than three months. This fuel type attracts moisture and may contain higher water content than conventional diesel fuel.

Fuel system maintenance, cleaning, and fuel line replacement are required more frequently for engines that are operated with biodiesel.

DRAINING WATER FROM FUEL FILTER

Diesel Vehicles Only

Water should be drained from the fuel filter daily. The fuel filter is mounted on a plate by the lower seat support panel (Figure 36).

1.Position a pan under the fuel filter.

2.Lift the passenger-side seat.

3.Locate the valve (1) on the underside of the filter. Turn the valve clockwise until water begins to stream from the filter.

4.Drain the water until it changes color (to fuel). See following WARNING.

HUV 4421 Owner’s Manual

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Contents 4421-G/GX/GXL Gas 4421-D/DX/DXL Diesel Utility Vehicles Page Page Foreword Table of Contents Vehicle Specifications Warranties Safety Decal and Feature Identification 2412 ALL HUV 4421 TWO Passenger Models364 2413 ALL HUV 4421 Four Passenger Models366 Proposition 65 State of California Practice SafetyGeneral Warnings Safety DetailsDisabling the Vehicle Recycling LEAD-ACID Batteries Disconnecting the Battery GASOLINE/DIESEL VehiclesConnecting the Battery GASOLINE/DIESEL Vehicles Disable the vehicle. See Disabling the Vehicle onModel Identification General InformationSerial Number Decal Controls and IndicatorsInstrument Panel Gasoline Vehicles Accelerator Pedal KEY Switch Gasoline VehiclesKEY Switch Diesel Vehicles FORWARD/REVERSE ControlSteering Adjustment Lock Brake PedalPark Brake Fuel GAUGE/HOUR Meter Volt Accessory OutletHIGH-TEMPERATURE Warning Light Diesel Vehicles only LOW OIL Warning LightRoll-Over Protective Structure and Seat Belts ROLL-OVER Protective Structure and Seat BeltsSeat Latch and Adjustment See Vehicle Specifications on PRE-OPERATION and Daily Safety ChecklistPerformance Inspection Driving InstructionsStarting the Vehicle ALL-WHEEL Drive AWD Operation See General Warnings on BED Latch and Prop RODStopping the Vehicle Parking and Leaving the VehicleBed Latch Loading and Unloading CargoVehicle Load Capacities Transporting on a Trailer Towing with the VehicleStorage Fuel Shut-off Valve Preparing the Vehicle for Extended StorageReturning the Stored Vehicle to Service MaintenancePeriodic Service Schedule Periodic Service Schedule Regular Interval Kawasaki gasoline engines Adjust valve Periodic Lubrication Schedule Lubrication Points Gasoline Vehicles Brake Fluid Brake Fluid ReservoirEngine OIL OIL Pressure Gasoline EngineEngine OIL Level Check Engine Oil Draining Engine OIL and Filter ChangeEngine Oil Drain Plug and Pan Gasoline Remove Engine Oil Filter Engine Oil Filling OIL ViscosityFront differential Gearcase LubricationRear differential TransmissionEngine Coolant Level Check Engine Coolant Diesel VehiclesAir Filter Removal AIR Filter ReplacementAir Filter Installation AIR Intake SystemBiodiesel Fuel Diesel Vehicles only Fueling InstructionsDiesel Vehicles Only Draining Water from Fuel FilterFuel Filter BatteryRemove the driver-side seat General Warnings on Using a Booster Battery Jump StartingJump Starting Cleaning the VehicleAccessories Electric Winch AccessoryMUD Tire Option Subsequent Owner Registration GXP DXP DXL Vehicle SpecificationsLiquid Capacities Tire Pressure Warranties WarrantyHOW to Make a Warranty Claim California Emission Control Warranty StatementHusqvarna Explanation of Emission Control Warranty Systems Covered Parts Description Page Page Page 103472526
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