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Husqvarna RZ4221 BF Operator's Manual
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Husqvarna RZ4221 BF Operator's Manual

Husqvarna RZ4221 BF Operator's Manual

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Operator Manual
Gasoline containing up to 10% ethanol
(E10) is acceptable for use in this
machine. The use of any gasoline
RZ4221 BF / 967176101
exceeding 10% ethanol (E10) will void
the product warranty.
Please read the operator's manual carefully and make sure you
understand the instructions before using the machine.

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Summary of Contents for Husqvarna RZ4221 BF

  • Page 1 Gasoline containing up to 10% ethanol (E10) is acceptable for use in this machine. The use of any gasoline RZ4221 BF / 967176101 exceeding 10% ethanol (E10) will void the product warranty. Please read the operator’s manual carefully and make sure you...
  • Page 2 In order to implement improvements, specifications and designs can be altered without prior notification. Note that no legal demands can be placed based on the information contained in these instructions. Use only original parts for repairs. The use of other parts voids the warranty. Do not modify or install non-standard equipment to the unit without consent from the manufacturer.

  • Page 3: Table Of Contents

    CONTENTS INTRODUCTION..............5 Running..............28 General................ 5 Operating.on.Hills............29 Driving.and.Transport.on.Public.Roads....... 5 Mowing.Tips............... 30 Towing................. 5 Stopping.the.Engine..........31 Operating..............5 Moving.Machine.By.Hand.......... 32 Good.Service............... 6 MAINTENANCE............... 33 Manufacturing.Number........6 Maintenance.Schedule..........33 SYMBOLS.AND.DECALS..........7 Battery............... 35 SAFETY................
  • Page 4 WARNING! Failure to follow cautious operating practices can result in serious injury to the operator or other persons. The owner must understand these instructions, and must allow only trained persons who understand these instructions to operate the mower. Each person operating the mower must be of sound mind and body and must not be under the influence of any mind altering substance.

  • Page 5: Introduction

    INTRODUCTION Congratulations Towing Thank you for purchasing a Husqvarna ride-on If machine is equipped with a tow hitch, use extreme mower. This machine is built for superior efficiency caution when towing. Never allow children or others in to rapidly mow primarily large areas. A control panel or on towed equipment.

  • Page 6: Good.service

    INTRODUCTION Good Service Husqvarna’s products are sold all over the world inspected and adjusted by your retailer. See the and only in specialized retail stores with complete certificate in the Service Journal in this operator’s service.. This ensures that you as a customer receive manual.

  • Page 7: Symbols.and.decals

    SYMBOLS.AND.DECALS These symbols are found on the machine and in the operator’s manual. Study them carefully so that you know what they mean. WARNING! IMPORTANT INFORMATION Xxxx xxxxxx xxxxx xxxx xxxxxxxxx Xxxx xxxxxx xxxxx xxxx xxxxxxxxx xxxxxx xxxxxx xxxxxxxxx. xx xxxxxxxx xxxx xxxxxxxxx.
  • Page 8 SYMBOLS.AND.DECALS Shut off engine and remove key before performing any Keep a safe Read Operator’s maintenance or repair distance from the Use on slopes no Manual work machine greater than 10° No passengers Whole body Severing of fingers Do not open or Careful backing up, Careful going exposure to...

  • Page 9: Safety

    SAFETY Safety Instructions These instructions are for your safety. Read them carefully. WARNING! WARNING! THIS CUTTING MACHINE IS CAPABLE This symbol means that important OF AMPUTATING HANDS AND FEET safety instructions need to be AND THROWING OBJECTS. FAILURE emphasized. It concerns your safety. TO OBSERVE THE FOLLOWING SAFETY INSTRUCTIONS COULD RESULT IN SERIOUS INJURY OR...
  • Page 10 SAFETY • Disengage blades when not mowing. Shut off engine and wait for all parts to come to a complete stop before cleaning the machine, removing the grass catcher, or unclogging the discharge guard. • Operate machine only in daylight or good artificial light.

  • Page 11: Personal.safety.equipment

    SAFETY Personal Safety Equipment WARNING! When using the machine, approved personal protective equipment (shown in illustrations) shall be used. Personal protective equipment cannot eliminate the risk of injury but it will reduce the degree of injury if an accident does happen.
  • Page 12 SAFETY • Do not use on steep slopes. • Do not try to stabilize the machine by putting a foot on the ground. • Do not mow near drop-offs, ditches, or embankments. The machine could suddenly roll over if a wheel is over the edge or if the edge caves in.

  • Page 13: Safe.handling.of.gasoline

    SAFETY Safe Handling of Gasoline WARNING! The engine and the exhaust system become very hot during operation. There is risk for burns if touched. Allow engine and exhaust system to cool before refueling. To avoid personal injury or property damage, use extreme care in handling gasoline.

  • Page 14: General.maintenance

    SAFETY General Maintenance • Never operate machine in a closed area. • Keep all nuts and bolts tight to be sure the equipment is in safe working condition. • Never tamper with safety devices. Check their proper operation regularly. • Keep machine free of grass, leaves, or other debris buildup.
  • Page 15 SAFETY Sparking can occur when working with the battery and the heavy cables of the starter circuit. This can cause battery explosion, fire or eye injury. Sparking in this circuit can not occur after the chassis cable (normally negative, black) is removed from the battery. WARNING! Avoid electrical sparking and its consequences by the following...

  • Page 16: Transport

    A spark arrestor for the muffler is available through should not be used on or near any any authorized Husqvarna dealer. unimproved forested, bush covered or grassy lands unless the engine's system is equipped with a spark arrestor meeting applicable local or state laws (if any).

  • Page 17: Controls

    CONTROLS This operator’s manual describes the Husqvarna Transmission from the engine is made via belt-driven Zero Turn Rider. The rider is fitted with a four-stroke hydraulic pumps. Using the left and right steering overhead valve engine. controls, the flow is regulated and thereby the direction and speed.

  • Page 18: Steering.control.levers

    CONTROLS Steering Control Levers The machine’s speed and direction are continuously variable using the two steering controls. The steering controls can be moved forward or backward about a neutral position. Furthermore, there is a neutral position, which is locked if the steering controls are moved outward.

  • Page 19: Parking.brake

    CONTROLS Parking Brake The parking brake is found on the right side of the machine. Pull the lever backward to activate the brake and forward to release it. IMPORTANT INFORMATION The machine must stand absolutely still when applying the parking brake. Always set the parking brake before dismounting.

  • Page 20: Choke.control

    CONTROLS Choke Control The choke control is used for cold starts in order to provide the engine with a richer fuel mixture. For cold starts the throttle knob should be pushed forward all of the way. WARNING! Gasoline is highly flammable. Observe caution and fill the tank outdoors (see Safety).

  • Page 21: Fuel.shut.off.valve

    Recommended air pressure is 15 psi. (1 bar) Tracking must be checked on a flat and level concrete or blacktop surface. If the unit still does not track straight contact your Husqvarna workshop for adjustments.

  • Page 22: Blade.control.lever

    CONTROLS Blade Control Lever To engage the mower blades, slowly lift the lever up and into the lock notch. WARNING! No adjustments or maintenance to be carried out unless: • the engine stopped 8058-074 • the ignition key removed Mower deck blade control lever in the disengaged position •...

  • Page 23: Operation

    OPERATION Read the Safety section and following pages, if you Steering are unfamiliar with the machine. To move forward and backward Training The direction and speed of the mower’s movements are effected by the movement of the control lever(s) Due to unique steering capabilities, zero turn mowers on each side of mower.

  • Page 24: Before.starting

    OPERATION Before Starting • Read the sections Safety Instructions and Controls before starting the machine. • Perform the daily maintenance before starting (see Maintenance Schedule in the Maintenance section). • Check that there is sufficient fuel in the fuel tank. •...
  • Page 25 OPERATION 5. Move the steering controls outward to the locked (outer) neutral position. 8050-028 Place controls in neutral position 6. Move the throttle to the middle position. 8050-008 Set the throttle 7. If the engine is cold, the choke control should be pushed forward to its extent.
  • Page 26 OPERATION 8. Open the fuel valve. 8050-010 Open the fuel valve 9. Press in and turn the ignition key to the start position. 8050-135 Turn to START position 10. When the engine starts, immediately release the ignition key back to the run position. IMPORTANT INFORMATION Do not run the starter for more than 5 seconds each time.

  • Page 27: Jumper.cables

    OPERATION Slowly slide the choke control back to the middle position when the engine has started. Set the desired engine speed with the throttle. Allow the engine to run at a moderate speed, approximately mid throttle, for 3-5 minutes before loading it too heavily.

  • Page 28: Running

    OPERATION Running 1. Release the parking brake by moving the lever downward. NOTE: The mower is equipped with an operator presence system. When the engine is running, any attempt by the operator to leave the seat without first setting the parking brake will shut off the engine.

  • Page 29: Operating.on.hills

    OPERATION Operating on Hills Read the Safety Instructions Driving on Slopes in the Safety Instructions. WARNING! Do not drive up or down hills with slopes greater than 10 degrees. Do not drive across slopes. • The slowest speed possible should be used before starting up or down hills.

  • Page 30: Mowing.tips

    OPERATION Mowing Tips WARNING! • Observe and flag rocks and other fixed objects to avoid collisions. Clear the lawn of stones and other objects that can be thrown out by the • Begin with a high cutting height and reduce it until blades.

  • Page 31: Stopping.the.engine

    OPERATION Stopping the Engine Allow the engine to idle a minute in order to attain normal operating temperature before stopping it, if it has been worked hard. Avoid idling the engine for longer periods, as there is a risk of the spark plugs fouling.

  • Page 32: Moving.machine.by.hand

    OPERATION Moving Machine By Hand When pushing or pulling the mower, be sure to engage the EZT Hydrogear bypass linkages. The EZT bypass linkages are located on the rear of the frame, below the rear engine guard. 1. Raise the deck into the highest cutting position. 2.

  • Page 33: Maintenance

    MAINTENANCE Maintenance Schedule The following is a list of maintenance procedures that an authorized service workshop is recommended to must be performed on the machine. For those points maintain your machine in the best possible condition not described in this manual, visit an authorized and to ensure safe operation.
  • Page 34 MAINTENANCE Daily At least Maintenance interval once in hours each MAINTENANCE Before After year ■ ■ Check/adjust throttle cable ● ● Check the condition of belts, belt pulleys ■ ■ Change the engine oil ■ ■ Replace the engine oil filter ■...

  • Page 35: Battery

    MAINTENANCE Battery CAUTION! Your mower is equipped with a maintenance free battery that does not need servicing. However, Always use protective glasses periodic charging of the battery with an automotive when handling the battery. type battery charger will extend its life. •...

  • Page 36: Safety.system

    MAINTENANCE Safety System The machine is equipped with a safety system that prevents starting or driving under the following conditions. The engine can only be started when: 1. The mower deck is disengaged. 2. The steering controls are in the outer, locked neutral position.

  • Page 37: Parking.brake

    Visually check that no damage is found on the lever, links, or switch belonging to the parking brake. Perform a standstill test and check that there is sufficient braking action. To adjust the parking brake, contact the Husqvarna service workshop. WARNING! Faulty adjustment can result in reduced braking ability and can cause an accident.

  • Page 38: Ezt.belt

    4. Tighten blade bolt securely. 5. Torque blade bolt to 45-55 ft/lbs (60-75 Nm). IMPORTANT INFORMATION Special blade bolt is heat treated. 8058-027 Replace with a Husqvarna bolt if required. Blade Blade bolt (special) Do not use lower grade hardware than Spindle housing specified.

  • Page 39: Adjusting.the.mower.deck

    MAINTENANCE Adjusting the Mower Deck WARNING! Before performing any service or adjustment checklist: 1. Engage the parking brake. 2. Place the Blade switch in the disengaged position. 3. Turn ignition switch to OFF position and remove the key. 4. Make sure the blades and all moving parts have completely stopped. 5.

  • Page 40: Caster.wheels

    MAINTENANCE Caster Wheels Check every 200 hours. Check that wheels rotate freely. If wheels do not rotate freely take the unit to your dealer for service. Foam filled tires or solid tires will void the warranty. Removal and installation of caster wheel 1.

  • Page 41: Lubrication

    LUBRICATION 8058-132 12/12.Every.year Lubricate.with.grease.gun Level.check 1/52.Every.Week Oil.change Filter.change 1/365.Every.day General Remove the ignition key to prevent unintentional Wipe away excess grease after lubrication. movements during lubrication. It is important to avoid getting lubricant on the belts When lubricating with an oil can, it must be filled with or the drive surfaces on the belt pulleys.

  • Page 42: Front.wheel.mount

    Transmission The transmission is maintenance free with no need for level checks or oil changes. If a leak occurs, replace the unit or contact the Husqvarna dealer. 8058-076 Lubricating the steering control shafts...

  • Page 43: Troubleshooting

    TROUBLESHOOTING Problem / Cause Engine will not start • Blade lever is engaged • Steering controls are not locked in neutral position • Driver is not sitting in driver’s seat • Parking brake is not activated • Battery is dead •...
  • Page 44 TROUBLESHOOTING Problem / Cause Engine overheats • Clogged air intake or cooling fins • Engine overloaded • Poor ventilation around engine • Defective engine speed regulator • Soot in the combustion chamber • Too little or no oil in the engine •...

  • Page 45: Winter.storage

    Drain the fuel into an purchase year, model, type, and serial number. approved container outdoors and store Always use genuine Husqvarna spare parts. far away from open flame. Never use An annual checkup at an authorized service workshop gasoline for cleaning.

  • Page 46: Schematics

    WIRING.DIAGRAM 8053-002...

  • Page 47: Technical.data

    TECHNICAL DATA The power rating of the engines 967017101 indicated is the average net power Engine output (at specified rpm) of a typical production engine for the engine Manufacturer Briggs & Stratton model measured to SAE standard Type Endurance J1349/ISO1585. Mass production Power 21 hp engines may differ from this value.

  • Page 48: Torque.specifications

    TECHNICAL.DATA Torque Specifications Engine crankshaft bolt 50 ft/lb (67 Nm) Standard " fasteners 18 ft/lb (25 Nm) Deck pulley bolts 150 ft/lb (203 Nm) Standard " fasteners 33 ft/lb (44 Nm) Lug nuts 75 ft/lb (100 Nm) Standard " fasteners 52 ft/lb (70 Nm) Blade bolt 90 ft/lb (122 Nm)

  • Page 49: Conformity.certificates

    CONFORMITY.CERTIFICATES USA requirements Labels are placed on the engine and/or in the engine compartment stating that the machine will fulfill the requirements. This is also applicable to special requirements for any of the states, (California emission rules etc.). Do not remove any of these labels. Certificates can also be supplied with the machine at delivery or written in the Engine manual.

  • Page 50: Service.journal

    SERVICE.JOURNAL Action Date, mtr reading, stamp, sign Delivery Service Charge battery. Adjust tire pressure of all wheels according to Technical Data. Mount the steering controls in the normal position. Connect the contact box to the cable for the seat’s safety switch. Check that the right amount of oil is in the engine.
  • Page 51 SERVICE.JOURNAL Action Date, mtr reading, stamp, sign After the First 10 Hours Change engine oil. 25-Hour Service Check the fuel pump’s air filter. Check the hydraulic system’s oil level. Check the tire pressures. Lubricate the belt adjuster, mower deck. Lubricate the belt adjuster, hydraulic pumps. Check/clean the engine’s cooling air intake.
  • Page 52 SERVICE.JOURNAL Action Date, mtr reading, stamp, sign 50-Hour Service Perform the 25-hour service. Clean/replace the air cleaner’s paper filter cartridge (shorter intervals for dusty operating conditions). Change engine oil. Lubricate according to lubrication chart. Check/adjust the parking brake. 100-Hour Service Perform the 25-hour service.
  • Page 53 SERVICE.JOURNAL Action Date, mtr reading, stamp, sign 300-Hour Service Perform the 25-hour service. Perform the 50-hour service. Perform the 100-hour service. Check/adjust the mower deck. Clean the combustion chamber and grind the valve seats. Check the engine valve clearance. Replace the air cleaner’s foam prefilter. At Least Once Each Year Clean the engine’s cooling air intake (25 hours).
  • Page 54 SERVICE.JOURNAL Action Date, mtr reading, stamp, sign...
  • Page 56 2012-06-01 115 498228 Rev A...

This manual is also suitable for:

967176101

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