Husqvarna HUV 4421-G / GXP, HUV 4421-D / DXP owner manual Gearcase Lubrication, Front differential

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Gearcase Lubrication

NOTE: Use engine oil with API classification SJ for gasoline engines and CF for diesel engines.

Using multi-grade oils (5W-20, 10W-30, and 10W-40) may increase oil consumption. If multi-grade oil is used, check the oil level more frequently.

SAE 30

SAE 10W-30

SAE 5W-30

Figure 30 Oil Viscosity Chart – Gasoline Vehicles

SAE 30

SAE 20

SAE 10W

SAE 10W-30/SAE 10W-40

Figure 31 Oil Viscosity Chart – Diesel Vehicles

GEARCASE LUBRICATION

NOTE: Dispose of used oil according to the environmental laws and regulations for your area.

LUBRICATION LEVEL CHECK FOR FRONT DIFFERENTIAL, TRANSMISSION, AND REAR DIFFERENTIAL

Each gearcase component is equipped with two oil port plugs (1 and 2) (Figure 32, Figure 33, and Figure 34). When the vehicle is on a level surface, use the level indicator hole (upper plug) (1) as a lubricant level indicator. Lubricant level should be even with the bottom of level indicator hole (1).

LUBRICATION CHANGE FOR FRONT DIFFERENTIAL, TRANSMISSION, AND REAR DIFFERENTIAL

Use the lower plug (2) for drainage (Figure 32, Figure 33, or Figure 34). Remove both plugs to allow the lubricant to drain faster. See preceding NOTE. Use the lower plug (2) for drainage (Figure 32, Figure 33, and Figure 34). Remove both plugs to allow the lubricant to drain faster. See preceding NOTE.

Metal particles may be discovered in the fluid or on the magnetic drain plug when changing the differential or transmission fluid. These particles are normal and expected for the first few fluid changes. This is a result of the gears being "net forged", meaning the gears are forged to a shape very close to the final gear size but the teeth are not finish machined prior to assembly. The "finish machining" occurs when the gears make contact under load during vehicle operation. The magnetic drain plug is included in the design to collect the metal par- ticles generated from the gear break in process. This is an established process and is not detrimental to gear service life.

Front differential:

Clean and install the drain plug (2) and washer before filling the front differential with new lubricant (Figure 32). Tighten the drain plug to 9 ft-lb (12 N·m). Use a funnel when filling the front differential through

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Contents 2007 Utility Vehicles Page USA Foreword Table of Contents ALL HUV 4421 Models DRIVER/PASSENGER Warning Decal Rotating Parts Decal Diesel Vehicle Feature Identification Safety Details DAN G E R Caut IONCaut ION General Warnings DAN G E RAll-wheel Drive Warning Model Identification Controls and IndicatorsGeneral Information See General Warnings onControls and Indicators FORWARD/REVERSE Control KEY Switch Gasoline VehiclesKEY Switch Diesel Vehicles Accelerator PedalBrake Pedal Steering Adjustment LockVolt Accessory Outlet Park BrakeFuel GAUGE/HOUR Meter HIGH-TEMPERATURE Warning Light Diesel Vehicles onlyLOW OIL Warning Light Headlight ControlROLL-OVER Protective Structure and Safety Belts Release Safety BeltSeat Latch and Adjustment INGPRE-OPERATION and Daily Safety Checklist Exhaust system Check for leaksPerformance Inspection Driving InstructionsStarting the Vehicle ALL-WHEEL Drive AWD Operation BED Latch and Prop ROD Stopping the VehicleParking and Leaving the Vehicle Loading and Unloading Cargo Bed LatchVehicle Load Capacities Towing with the Vehicle Transporting on a TrailerStorage See General Warnings on DAN G E RPreparing the Vehicle for Extended Storage OFFReturning the Stored Vehicle to Service Gasoline vehiclesMaintenance MaintenancePeriodic Service Schedule Periodic Service ScheduleMonthly service by owner Annual service by Periodic Lubrication Schedule Periodic Lubrication ScheduleLubrication Points Gasoline Vehicles Brake Fluid Brake Fluid ReservoirEngine OIL OIL Pressure Gasoline EngineEngine OIL Level Check Do not remove dipstick while engine is runningEngine OIL and Filter Change Engine Oil DrainingEngine Oil Filter Change Drain the engine oil. See Engine Oil Draining onRemove Engine Oil Filter Engine Oil Filling OIL ViscosityGearcase Lubrication Front differentialTransmission Rear differentialAIR Intake System AIR Filter ReplacementEngine Coolant Diesel Vehicles Engine Coolant Level CheckAir Filter Installation Fueling InstructionsAir Filter Removal Biodiesel Fuel Diesel Vehicles Only Fuel Tank Gasoline VehiclesDraining Water from Fuel Filter Diesel Vehicles OnlyBattery Fuel FilterBattery Using a Booster Battery Jump Starting Jump StartingElectric Winch Accessory Cleaning the VehicleAccessories See following NoteSubsequent Owner Registration MUD Tire OptionVehicle Specifications SpecificationsDIMENSIONS/WEIGHT Tire Pressure Warranty Information Technical & Consumer Information Gasoline Engines Carburetor Modification for High Altitude OperationOxygenated Fuels Replacement Parts U.S. and California Clean Air ActsProblems That May Affect Emissions MaintenanceCalifornia Emission Control Warranty Statement Your Warranty Rights and ObligationsPage Page Page Husqvarna Part Number 531 30 Edition Code 0706C0307B
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