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Husqvarna EZ4220 Operator's Manual

Husqvarna seated lawn mower operator's manual
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Operator's Manual
EZ4621 / 968999657, EZ5226 / 968999658
EZ4220/ 968999692, EZ4822 / 968999696
EZ6124 / 968999699
Please read the operator's manual carefully and make sure you
understand the instructions before using the machine.
English

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  Summary of Contents for Husqvarna EZ4220

  • Page 1 Operator’s Manual EZ4621 / 968999657, EZ5226 / 968999658 EZ4220/ 968999692, EZ4822 / 968999696 EZ6124 / 968999699 Please read the operator’s manual carefully and make sure you understand the instructions before using the machine. English...
  • Page 2: Table Of Contents

    Contents Contents ... 1 Introduction ... 3 Congratulations ... 3 General ... 3 Driving and Transport on Public Roads ... 3 Towing ... 3 Operating ... 3 Good Service ... 4 Manufacturing Number ... 4 Symbols and Decals... 5 Safety Instructions ... 7 General Operation ...
  • Page 3 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 4: Introduction

    INTRODUCTION Congratulations Thank you for purchasing a Husqvarna ride-on mower. This machine is built for superior efficiency to rapidly mow primarily large areas. A control panel easily accessible to the operator and a hydrostatic transmission regulated by steering controls both contribute to the machine’s performance.
  • Page 5: Good Service

    Good Service Husqvarna’s products are sold all over the world and only in specialized retail stores with complete service. This ensures that you as a customer receive only the best support and service. Before the product is delivered, the machine has, for example, been inspected and adjusted by your retailer. See the certificate in the Service Journal in this operator’s manual.
  • Page 6: 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! Xxxx xxxxxx xxxxx xxxx xxxxxxxxx xxxxxx xxxxxxxxx. xx xxxxxxxx xxxx xxxxxx. Used in this publication to notify the reader of a risk of personal injury or death, particularly if the reader should neglect to follow instructions given in the manual.
  • Page 7 Read Shut off engine and Operator’s remove key before Manual performing any maintenance or repair work Whole body Severing of fingers exposure to and toes thrown objects Moving sharp blades under cover English SYMBOLS AND DECALS Keep a safe distance from the machine Do not open or remove safety...
  • Page 8: Safety Instructions

    Safety Instructions These instructions are for your safety. Read them carefully. WARNING! This symbol means that important safety instructions need to be emphasized. It concerns your safety. IMPORTANT: THIS CUTTING MACHINE IS CAPABLE OF AMPUTATING HANDS AND FEET AND THROWING OBJECTS.
  • Page 9 stop engine, and remove keys before dismounting. • 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. •...
  • Page 10: Personal Safety Equipment

    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. Ask your retailer for help in choosing the right equipment.
  • Page 11: Children

    use on steep slopes. • Do not try to stabilize the machine by putting your 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 12: Maintenance

    Maintenance WARNING! The engine must not be started when the driver’s floor plate or any protective plate for the mower deck’s drive belt is removed. Safe Handling of Gasoline To avoid personal injury or property damage, use extreme care in handling gasoline. Gasoline is extremely flammable and the vapors are explosive.
  • Page 13 • 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. Clean oil or fuel spillage and remove any fuel-soaked debris.
  • Page 14 regularly to be sure it works properly. The machine must not be driven with defective or unmounted protective plates, protective cowlings, safety switches, or other protective devices. • Do not change the settings of governors and avoid running the engine with overly high engine speeds.
  • Page 15: Transport

    desired. • Reduce the risk of fire by removing grass, leaves, and other debris that may have accumulated on the machine. Allow the machine to cool before putting it in storage. • Regularly clean deck and underside of deck, avoid spraying engine and electrical components with water.
  • Page 16: Customer Responsibilities

    (if any). If a spark arrester is used, it should be maintained in effective working order by the operator. A spark arrester for the muffler is available through your authorized Husqvarna dealer. SAFETY English...
  • Page 17: Controls

    Controls This operator’s manual describes the Husqvarna Zero Turn Rider. The rider is fitted with either a Briggs & Stratton or Kohler four-stroke overhead valve engine developing 20 - 26 horse power. Transmission from the engine is made via two belt- driven hydraulic pumps, which in turn drive a hydraulic motor for each drive wheel.
  • Page 18: Parking Brake

    1. Parking Brake IMPORTANT INFORMATION The machine must stand absolutely still when applying the parking brake. Always set the parking brake before dismounting. Release the parking brake before moving the mower. The parking brake is found on the left of the machine. Pull the lever backward to activate the brake and forward to release it.
  • Page 19: 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. 3. Fuel Shut Off Valve The fuel shut off valve is located under the fuel tank.
  • Page 20: Refueling

    5. Refueling Read the safety instructions before refueling. The machine has one fuel tank, just behind the seat. The tank volume is 5.4 gallons (20.4 liters). Make sure the fuel cap is properly tightened and the cap gasket is not damaged. The engine will run on a minimum of 85-octane unleaded gasoline (no oil mix).
  • Page 21: By Pass Linkage

    6. By pass linkage When pushing or pulling the mower, be sure to engage the IZT (Integrated Zeroturn Transaxle) bypass linkages. The IZT bypass linkages are located on the rear of the frame, below the rear engine guard. • Raise the deck into the highest cutting position.
  • Page 22: Hour Meter

    8. Hour Meter The hour meter displays the total operating time. It will flash CHG OIL (Change Oil) at 50 hour intervals. The flash duration is one hour before and one hour after the interval. The CHG OIL icon will come on and shut off automatically.
  • Page 23: Throttle Control

    11. Throttle Control The throttle control regulates the engine speed and thereby the rate of rotation of the blades, assuming the blade switch is pulled out, see Engaging the Mower Deck. In order to increase or decrease the engine speed, the control is moved forward or backward respectively.
  • Page 24: Cutting Height Pedal

    13. Cutting height pedal The cutting deck height is obtained by pressing the foot pedal lift arm forward and releasing the transport latch. Then lower the deck to the preset height. To raise the deck push forward on the foot pedal lift arm until the transport latch locks.
  • Page 25: Operation

    Operation Read “Safety Instructions” section and following pages, if you are unfamiliar with the machine. Training Zero turn mowers are far more maneuverable than typical riding mowers due to their unique steering capabilities. We suggest that this section be reviewed in its entirety prior to attempting to move the mower under its own power. Additionally, we suggest when first operating the mower, use a reduced throttle speed and reduced ground speed by NOT moving control levers to the furthest forward or reverse positions during initial operation, or until operator becomes comfortable with controls.
  • Page 26: Before Starting

    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. • Adjust the seat to the desired position.
  • Page 27 5. Move the steering controls outward to the locked (outer) neutral position. Move the throttle to the middle position. 7. If the engine is cold, the choke control should be pulled out to its extents. English OPERATION Steering controls in the outward, locked neutral position Set the throttle Set the choke control 8011-724...
  • Page 28 8. Open the fuel shut off valve. 9. Press in and turn the ignition key to the 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 29 11. Press the choke control in gradually when the engine has started. 12. Set the desired engine speed with the throttle. Allow the engine to run at a moderate speed, “ha throttle”, for 3-5 minutes before loading it too heavily. USE FULL THROTTLE WHEN MOWING (no choke).
  • Page 30: To Start An Engine With A Weak Battery

    To start an engine with a weak battery WARNING! Lead-acid batteries generate explosive gases. Keep sparks, flame and smoking materials away from batteries. Always wear eye protection then around batteries. If your battery is too weak to start the engine, it should be recharged.
  • Page 31: Running

    Running 1. Release the parking brake by moving the lever downward. Your 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 32: Operating On Hills

    a straight line forward or backward respectively. In order, for example, to turn right while moving forward, move the right control towards the neutral position. The rotation of the right wheel is reduced and the machine turns to the right. Turning on the spot can be achieved by moving one control backward (behind the neutral position) and carefully moving the...
  • Page 33: Mowing Tips

    Mowing Tips • Observe and flag rocks and other fixed objects to avoid collisions. • Begin with a high cutting height and reduce it until the desired mowing result is attained. The average lawn should be cut to 2½" (64 mm) during the cool season and over 3"...
  • Page 34 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. 1.
  • Page 35: Moving By Hand

    Moving by Hand WARNING! No adjustments or maintenance to be carried out unless: the engine stopped the ignition key removed the parking brake activated When pushing or pulling the mower, be sure to engage the IZT (Integrated Zeroturn Transaxle) bypass linkages.
  • Page 36: Maintenance

    Maintenance Maintenance Schedule The following is a list of maintenance procedures that must be performed on the machine. For those points not described in this manual, visit an authorized service workshop. An annual service carried out by an authorized service workshop is recommended to maintain your machine in the best possible condition and to ensure safe operation.
  • Page 37 Maintenance Check/adjust throttle and choke cables Check the condition of belts, belt pulleys, etc. Change the engine oil Replace the engine oil filter Clean/replace the spark plugs Replace the fuel filter Replace the air filter (paper filter) Check the caster wheels (every 200 hours) Clean the cooling fins Replace the air cleaner’s pre-filter Check/adjust the mower deck...
  • Page 38: Battery

    Battery Your mower is equipped with a maintenance free battery and does not need servicing. However, periodic charging of the battery with an automotive type battery charger will extend its life. Keep battery and terminals clean. Keep battery bolts tight. Recharge at 6-10 amperes for 1 hour To clean battery and terminals Corrosion and dirt on the battery and terminals can...
  • Page 39: Ignition System

    Ignition System The engine is equipped with an electronic ignition system. Only the spark plugs require maintenance. For recommended spark plugs, see Technical Data. 1. Remove the ignition cable boot and clean around the spark plug. 2. Remove the spark plug with a spark plug socket wrench.
  • Page 40: Checking The Engine's Cooling Air Intake

    Checking the Engine’s Cooling Air Intake Check that the engine’s cooling air intake is free from leaves, grass, and dirt. If the cooling air intake is clogged, engine cooling deteriorates, which can lead to engine damage. The cooling air intakes rotates when the engine is running.
  • Page 41: Replacing The Air Filter

    Replacing the Air Filter - Briggs & Stratton Engine Standard air filter If the engine seems weak or runs unevenly, the air filter may be clogged. If run with a dirty air filter, the spark plugs can become fouled disrupting operation. For this reason, it is important to replace the air filter regularly (see the heading Maintenance Schedule for the proper service interval).
  • Page 42 Replacing the Air Filter - Kohler Engine These engines are equipped with a replaceable, high density paper air cleaner element. Some engines are also equipped with an oiled, foam precleaner which surrounds the paper element. Two different capacity air cleaner systems are available. Check the air cleaner daily or before starting the engine.
  • Page 43 Replacing Heavy Duty Air Filter If the engine seems weak or runs unevenly and the dust load indicator has turned red the air filter may be clogged. If run with a clogged air filter, disruption of operation can occur. Cleaning/replacing the air filter is carried out as follows: Only do so when the dust indicator is red.
  • Page 44: Replacing The Fuel Filter

    Replacing the Fuel Filter Replace the line-mounted fuel filter every 100 hours (once per season) or more regularly if it is clogged. Replace the filter as follows: 1. Move the hose clamps away from the filter. Use flat-nosed pliers. 2. Pull the filter loose from the hose ends. 3.
  • Page 45: Checking The 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 result in reduced braking ability and can cause an accident.
  • Page 46 Deck belt installation NOTE: For ease in installing the deck belt, refer to the routing decal on the front edge of the deck. • Wrap the deck belt around the electric clutch that is located on the engine shaft. • Push the rest of the belt through the IZT(Integraded Zeroturn Transaxle) support and up onto the deck.
  • Page 47: Izt Belt

    IZT belt To replace IZT (Integraded Zeroturn Transaxle) belt Park the mower on a level surface. Engage the park brake. IZT belt removal NOTE: Be careful not to damage the fan blades on the IZT as this can affect cooling or damage the IZT •...
  • Page 48: Checking The Blades

    Checking the Blades In order to attain the best mowing effect, it is important that the blades are well sharpened and not damaged. WARNING! Blades are sharp. Protect your hands with gloves and/or wrap blades with a heavy cloth when handling.
  • Page 49 Install and tighten blade bolt securely. • Torque blade bolt to 45-55 ft/lbs (60-75 Nm). IMPORTANT INFORMATION Special blade bolt is heat treated. Replace with a Husqvarna bolt if required. Do not use lower grade hardware than specified. English MAINTENANCE 1.
  • Page 50: Adjusting The Mower Deck

    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 51 To adjust anti-scalp rollers Anti-scalp rollers are properly adjusted when they are just slightly off of the ground when the deck is at the desired cutting height in the operating position. Anti- scalp rollers then keep the deck in the proper position to help prevent scalping in most terrain conditions.
  • Page 52: Cleaning And Washing

    Cleaning and Washing Regular cleaning and washing, especially under the mower deck, will increase the machine’s life-span. Make it a habit to clean the machine directly after use (after it is cooled), before the dirt sticks. Do not spray water on the top of the mower deck. Use compressed air to clean the top side of mower deck.
  • Page 53: Parking Brake

    Parking brake To adjust parking brake Jack up unit and support properly with jack stands. Allow clearance to work at rear transaxles. Before making any adjustments: Set park brake. Measure the distance between the rod swivel pin and the brake arm washer. With the brake engaged, there should be a gap of 1/8"...
  • Page 54: Lubrication

    Lubrication Lubrication Schedule 12/12 Every year Lubricate with grease gun 1/52 Every Week 1/365 Every day *Change transaxles (transmission) filters. General Remove the ignition key to prevent unintentional movements during lubrication. When lubricating with an oil can, it must be filled with engine oil. When lubricating with grease, unless otherwise stated, use a high grade molybdenum disulfide grease.
  • Page 55: Lubricating The Cables

    Lubricating the Cables If possible, grease both ends of the cables and move the controls to end stop positions when lubricating. Refit the rubber covers on the cables after lubrication. Cables with sheaths will bind if they are not lubricated regularly. If a cable binds, it can disrupt operation.
  • Page 56 4. Deck outer spindle Lubricate using a grease gun, one zerk, each side 2-3 strokes. Use only good quality bearing grease. 5. Engine Oil Changing the Engine Oil The engine oil should be changed for the first time after 5-8 hours of operation. Thereafter, it should be changed every 50 hours.
  • Page 57 LUBRICATION Checking the Oil Level Check the oil level in the engine when the machine is standing level and the engine is stopped. Remove the dipstick, wipe it clean, and then replace it. The dipstick should be screwed into place. Take the dipstick out again and read the oil level.
  • Page 58 6. Changing the Engine Oil Filter 1. Drain the engine oil in accordance with the work description under the heading Engine Oil/Change Engine Oil. 2. Remove the oil filter. If necessary, use a filter remover. 3. Wipe new, clean engine oil onto the seal for the new filter.
  • Page 59 7. Drain old oil filters of all free flowing oil prior to disposal. Place used oil in appropriate containers and dispose of it in accordance with laws in your area. 8. Remove the top port plug (see illustration) from the left side and right side of the transaxles prior to filling with oil.
  • Page 60 Purging Procedures Due to the effects air has on efficiency in hydrostatic drive applications, it is critical that it is purged from the system. These purge procedures should be implemented any time a hydrostatic system has been opened to facilitate maintenance or any additional oil has been added to the system.
  • Page 61: Trouble Shooting Guide

    TROUBLE SHOOTING GUIDE Trouble Shooting Guide Problem The engine will not start. The starter does not turn the engine over. The engine runs rough. English Cause • The blade switch is engaged. • The steering controls are not locked in the neutral position.
  • Page 62 TROUBLE SHOOTING GUIDE The engine seems weak. The engine overheats. Battery not charging. The machine moves slowly, unevenly, or not at all. Mower deck not engaging. Transaxle leaks oil. • Clogged air filter. • Defective spark plugs. • Carburetor incorrectly adjusted. •...
  • Page 63 TROUBLE SHOOTING GUIDE Uneven mowing results. The machine vibrates. English • Different air pressure in the tires on the left and right sides. • Bent blades. • The suspending for the mower deck is uneven. • The chain fixture has come loose. •...
  • Page 64: Storage

    Service When ordering spare parts, please specify the purchase year, model, type, and serial number. Always use genuine Husqvarna spare parts. An annual check-up at an authorized service workshop is a good way to ensure that your machine performs its best the following season.
  • Page 65: Wiring Diagram

    NOTE: 1. SEAT UNOCCUPIED 2. BRAKE SWITCH IN OFF POSI- TION 3. MOTION CONTROL LEVERS OUT 4. PTO IN OFF POSITION SOLENOID RIGHT MOTION CONTROL LEVER LEFT MOTION CONTROL LEVER SEAT SW. ELECTRIC CLUTCH English WIRING DIAGRAM BRAKE SW. ENGINE PIGTAIL 7.5 AMP PTO SW.
  • Page 66: Technical Data

    Technical Data Engine Manufacturer Type Power Lubrication Oil capacity excl filter Oil capacity incl filter Engine oil, Synthetic Engine oil, Mineral Class Fuel Fuel tank capacity Spark plugs/gap Cooling Air filter Alternator Starter Transmission Transmission Speed and direction controls Speed forward Speed reverse Brakes Front caster tires, smooth tread...
  • Page 67 Technical Data Engine Manufacturer Type Power Lubrication Oil capacity excl filter Oil capacity incl filter Engine oil, Synthetic Engine oil, Mineral Class Fuel Fuel tank capacity Spark plugs/gap Cooling Air filter Alternator Starter Transmission Transmission Speed and direction controls Speed forward Speed reverse Brakes Front caster tires, smooth tread...
  • Page 68 Equipment Cutting width Cutting height Uncut circle Number of blades Blade length Nose rollers Michigan Seat Hinged armrests Hour meter Blade engagement Deck construction Overall dimensions Weight Base machine length Base machine width Base machine height Overall width, chute up Overall width, chute down English TECHNICAL DATA...
  • Page 69 Speed forward Speed reverse Brakes Front caster tires, smooth tread Rear tires, Turf pneumatic Tire pressure, front and rear TECHNICAL DATA EZ4220 / 968999692 Kohler Courage Twin 20 hp Pressure with oil filter SAE 5W30, 10W30 SAE 30, (winter 10w30)
  • Page 70 Equipment Cutting width Cutting height Uncut circle Number of blades Blade length Nose rollers Michigan Seat Hinged armrests Hour meter Blade engagement Deck construction Overall dimensions Weight Base machine length Base machine width Base machine height Overall width, chute up Overall width, chute down English TECHNICAL DATA...
  • Page 71 Technical Data Engine Manufacturer Type Power Lubrication Oil capacity excl filter Oil capacity incl filter Engine oil, Synthetic Engine oil, Mineral Class Fuel Fuel tank capacity Spark plugs/gap Cooling Air filter Alternator Starter Transmission Transmission Speed and direction controls Speed forward Speed reverse Brakes Front caster tires, smooth tread...
  • Page 72 Equipment Cutting width Cutting height Uncut circle Number of blades Blade length Nose rollers Michigan Seat Hinged armrests Hour meter Blade engagement Deck construction Productivity Productivity Overall dimensions Weight Base machine length Base machine width Base machine height Overall width, chute up Overall width, chute down English TECHNICAL DATA...
  • Page 73: Conformity Certificates

    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, (Californian emission rules etc.).
  • Page 74: Service Journal

    Service Journal Action Delivery Service 1. Charge the battery. 2. Adjust the tire pressure of all wheels to 15 PSI (1 bar). 3. Mount the steering controls in the normal position. 4. Connect the contact box to the cable for the seat’s safety switch.
  • Page 75: After The First 5-8 Hours

    SERVICE JOURNAL After the First 5-8 Hours 1. Change engine oil. English...
  • Page 76: 25-Hour Service

    SERVICE JOURNAL Action Date, mtr reading, stamp, sign 25-Hour Service 1. Check the fuel pump’s air filter. 2. Sharpen/Replace mower blades if required. 3. Check the tire pressures. 4. Check battery with cables. 5. Lubricate according to lubrication chart. 6. Check/clean the engine’s cooling air intake. 7.
  • Page 77: 50-Hour Service

    SERVICE JOURNAL Action Date, mtr reading, stamp, sign 50-Hour Service 1. Perform the 25-hour service. 2. Clean/replace the air cleaner’s filter cartridge (paper filter) (shorter intervals for dusty operating conditions). Change engine oil. 4. Lubricate according to lubrication chart. 5. Check/adjust the parking brake. English...
  • Page 78: 100-Hour Service

    Action 100-Hour Service 1. Perform the 25-hour service. 2. Perform the 50-hour service. 3. Change the engine oil filter. 4. Clean/replace the spark plugs. 5. Replace the fuel filter. 6. Clean the cooling fins on the engine and transmission. Check V-belts. Check tighten caster wheel axle bolts (every 200 hours).
  • Page 79: 300-Hour Service

    SERVICE JOURNAL Action Date, mtr reading, stamp, sign 300-Hour Service 1. Inspect the machine. Come to agreement with the customer as to which additional work is to be carried out. 2. Perform the 25-hour service. 3. Perform the 50-hour service. 4.
  • Page 80: At Least Once Each Year

    SERVICE JOURNAL Action Date, mtr reading, stamp, sign At Least Once Each Year 1. Clean the engine’s cooling air intake (25 hours). 2. Replace the air cleaner’s pre-filter (foam) (300 hours). 3. Replace the air filter’s paper cartridge. 4. Change the engine oil (50 hours). 5.
  • Page 81 SERVICE JOURNAL Action Date, mtr reading, stamp, sign...
  • Page 84 Part No. 539 131329Rir (07/02/07)