Operator Manual RZ4621 BF / 966582301 Please read the operator’s manual carefully and make sure you understand the instructions before using the machine.
When this product is worn out and no longer used, it should be returned to the reseller or other party for recycling. 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.
Contents INTRODUCTION................................................................ 5 Driving and Transport on Public Roads....................... 5 Towing.......................................................................... 5 Operating..................................................................... 5 Good Service............................................................... 6 Symbols and Decals................................................... 7 Safety.........................................
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.
INTRODUCTION Congratulations Towing 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. This manual is a valuable document. Read the contents carefully before using or servicing the machine.
INTRODUCTION 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. When you need spare parts or support in service questions, warranty issues, etc.
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 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. Xxxx xxxxxx xxxxx xxxx xxxxxxxxx xxxxxx xxxxxxxxx. xx xxxxxxxx xxxx xxxxxx.
symbols and decals Read Operator’s Manual Shut off engine and remove key before performing any maintenance or repair work Whole body Severing of fingers exposure to and toes thrown objects Moving sharp blades under cover 8 Keep a safe distance from the machine Use on slopes no greater than 10° No passengers Do not open or remove safety shields while engine is running Careful backing up, watch for other people Careful going forward, watch for other people
SAFETY 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. FAILURE TO OBSERVE THE FOLLOWING SAFETY INSTRUCTIONS COULD RESULT IN SERIOUS INJURY OR DEATH. General Operation • Read, understand, and follow all instructions on the machine and in the manual before starting.
SAFETY • • • • • • • • • • 10 Do not operate the machine while under the influence of alcohol or drugs. Watch for traffic when operating near or crossing roadways. Use extra care when loading or unloading the machine into a trailer or truck. Always wear eye protection when operating machine. Data indicates that operators age 60 years and above are involved in a large percentage of riding mower-related injuries.
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. Ask your retailer for help in choosing the right equipment. • • • • • • • Make sure that you have first aid equipment close at hand when using the machine. Never use the machine when barefoot.
SAFETY Children Tragic accidents can occur if the operator is not alert to the presence of children. Children are often attracted to the machine and the mowing activity. Never assume that children will remain where you last saw them. • Keep children out of the mowing area and in the watchful care of a responsible adult other than the operator. • Be alert and turn machine off if a child enters the area. • Before and while backing, look behind and down for small children.
SAFETY 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. • Extinguish all cigarettes, cigars, pipes, and other sources of ignition. • Use only approved gasoline containers. • Never remove gas cap or add fuel with the engine running.
SAFETY General Maintenance • • • • • • • • • • • • • • • • • 14 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. Clean oil or fuel spillage and remove any fuel-soaked debris. Allow machine to cool before storing. If you strike a foreign object, stop and inspect the machine.
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 routines: • • • • • • • • Use protective goggles. Ensure that the fuel filler cap is mounted tightly and no flammable substances are stored in an open vessel.
SAFETY • The machine is tested and approved only with the equipment originally provided or recommended by the manufacturer. Only use approved repair parts for the machine. The blades are sharp and can cause cuts and gashes. Wrap the blades or use protective gloves when handling them. Check the parking brake’s functionality regularly. Adjust and service as necessary. The mulch blades should only be used in familiar areas when higher quality mowing is desired.
CONTROLS This operator’s manual describes the Husqvarna Zero Turn Rider. The rider is fitted with either a Briggs & Stratton four-stroke overhead valve engine. Transmission from the engine is made via a beltdriven hydraulic pumps. Using the left and right steering controls, the flow is regulated and thereby the direction and speed. Control Locations 2 13 7 1 9 11 8 1. 2. 3. 4. 5. 6. 7.
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. When both controls are in the neutral position (N), the machine stands still.
CONTROLS 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. Push the release button and pull the lever backward to activate the brake—push forward to release it.
CONTROLS Ignition Switch The ignition key is placed on the control panel and is used to start and stop the engine. Ignition switch 8052-001 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 control should be pulled out. 8052-001 Choke control Fuses Fuses are located on the left hand side of the machine. They are accessed by tilting the seat forward. They are flat pin fuses of the same type used in automobiles.
CONTROLS Fuel Tank Read the safety instructions before refueling. The machine has one fuel tank, just behind the console. The tank capacity is 3 gallons (11.4 liters). Regularly check the gas cap gasket for damage and keep the cap properly tightened. The engine will run on a minimum of 85-octane unleaded gasoline (no oil mix). Environmentally adapted alkylate gasoline can be used. See also Technical Data concerning ethanol fuel. Methanol fuel is not allowed. Do not use E85 alcohol based fuel.
CONTROLS Fuel Shut Off Valve The fuel shut off valve is located at the left rear of the seat. The valve is off when the handle tab is turned perpendicular to the fuel line. IMPORTANT INFORMATION Fuel shut off valve in the CLOSED position 8011-419 Always raise the deck to the highest position for transport. Cutting Height Adjuster To set the desired deck cutting height, press the release button and move the lever forward to the correct cutting height on the cutting plate.
CONTROLS Seat Adjustment Lever The seat can be adjusted lengthways. When making adjustments, the lever under the right side of the seat is pulled up, after which the seat can be moved backward or forward. Lengthways adjustment 8058-023 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.
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.
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. • Adjust the seat to the desired position. The following conditions must be fulfilled before the engine can be started: • The blade switch for engaging the mower blades must be depressed. • The parking brake must be on.
operation Move the steering controls outward to the locked (outer) neutral position. Place controls in neutral position 8061-026 Move the throttle to the middle position. Set the throttle 8052-001 If the engine is cold, the choke control should be pulled up.
operation Press in and turn the ignition key to the start position. IMPORTANT INFORMATION Do not run the starter for more than 5 seconds each time. If the engine does not start, wait approximately 10 seconds before retrying. Turn to the start position 8050-780 When the engine starts, immediately release the ignition key back to the run position. WARNING! Engine exhaust and certain vehicle components contain or emit chemicals considered to cause cancer, birth defects or other reproductive system damage.
operation Weak Battery WARNING! Lead-acid batteries generate explosive gases. Keep sparks, flame and smoking materials away from batteries. Always wear eye protection when around batteries. IMPORTANT INFORMATION Your mower is equipped with a 12-volt negative grounded system. The other vehicle must also be a 12-volt negative grounded system. Do not use your mower to start other vehicles.
operation Running 1. Release the parking brake by pushing the top release button in and 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. 2. Move the steering controls to the neutral position (N). Parking brake released 8058-020 3. Set retaining pin into selected cutting height and secure the opposite side with a cotter hairpin.
operation 6. Engage the mower deck by pulling out the blade switch. 7. Move throttle control to full throttle. The machine’s speed and direction are continuously variable using the two steering controls. When both controls are in the neutral position, the machine stands still. By moving both controls an equal amount forward or backward, the machine moves in a straight line forward or backward respectively.
operation 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" (76 mm) during the hot months. For healthier and better looking lawns, mow often after moderate growth. For best cutting performance, grass over 6" (15 cm) in height should be mowed twice.
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. • Disengage the mower deck by depressing the blade switch. Disengage the mower deck and move throttle to minimum • Raise the mower deck by pressing the release button on the lever and pulling fully backward to the transport position.
operation Manual Transport When pushing or pulling the mower, engage the EZT (Integrated Zeroturn Transaxle) 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. Pull the EZT bypass linkages up and out of the keyhole slots. Release the levers with the head outside the frame and held in the bypass position. 3. To reengage the EZT’s to drive, reverse the above procedure.
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. Read Maintenance in the Safety Instructions section. 1) First change after 5-8 hours.
MAINTENANCE Daily MAINTENANCE Before After At least once each year Maintenance interval in hours 25 50 100 ■ ● Check/adjust throttle cable Check the condition of belts, belt pulleys Change the engine oil 1) Replace the engine oil filter Clean/replace the spark plugs Replace the fuel filter Replace air filter 2) (paper filter) Check the caster wheels (every 200 hours) Replace the air cleaner’s pre-filter 2) (foam) Check/adjust the mower deck Check the engine valve clearance 3) Perform the 300-hour
MAINTENANCE 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. • • • STANDARD STATE BATTERY OF CHARGE APPROXIMATE BATTERY CHARGING TIME* TO FULL CHARGE AT 80OF / 27OC Maximum Rate at: 50 Amps 30 Amps 20 Amps 10 Amps 12.6V 100% 12.4V 75% 20 min. 35 min. 48 min. 90 min. 12.2V 50% 45 min. 75 min. 95 min. 180 min. Keep battery bolts tight. 12.
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. 3. The parking brake is on. Make daily inspections to ensure that the safety system works by attempting to start the engine when one of the conditions is not met. Change the conditions and try again.
MAINTENANCE Tire Pressures All tires should be at 15 psi / 103 kPa / 1 bar. Check tire pressures 8011-564 Parking Brake Visually check that no damage is found on the lever, cables, 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. IMPORTANT INFORMATION The machine must be absolutely standing still when applying the parking brake.
MAINTENANCE V-belts 1 Check every 100 hours of operation. Check for severe cracking and large nicks. NOTE: The belt will show some small cracks in normal operation. The belts are not adjustable. Replace belts if they begin to slip from wear. Deck Belt 1. Park on a level surface. Apply parking brake. 2. Lower the deck into the lowest cutting position. 3. Remove bolts from belt shields and remove shields. 4.
MAINTENANCE Cutting Blades In order to attain the best mowing effect, it is important that the blades are well sharpened and not damaged. Bent or cracked blades or blades with large nicks should be replaced. IMPORTANT INFORMATION The sharpening of blades should be carried out by an authorized service workshop. Damaged blades should be replaced when hitting obstacles that result in a breakdown. Let the service workshop decide whether the blade can be repaired/ ground or must be replaced.
MAINTENANCE Adjusting the Mower Deck Leveling deck Adjust the deck while the mower is on a level surface. Make sure the tires are inflated to the correct pressure. See Technical Data under Transmission. If tires are under or over inflated, the deck cannot be properly adjusted. The deck should be adjusted slightly higher in the rear. NOTE: To insure accuracy of leveling procedure, mower deck drive belt must be installed prior to leveling deck. 1. Wear heavy gloves.
MAINTENANCE 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. IMPORTANT INFORMATION Adjust anti-scalp rollers with the mower on a flat level surface.
MAINTENANCE Cleaning 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 debris sticks. Use compressed air to clean the top side of mower deck. For cleaning the underside of the deck, use the cleanout port. Attach the quick connect (from the accessory packet) to any garden hose. After mowing, snap the hose to the cleanout port and turn on water.
LUBRICATION 8050-832 12/12 Every year Lubricate with grease gun 1/52 Every Week Oil change 1/365 Every day Filter change 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 disulphide grease. For daily use, the machine should be lubricated twice weekly.
LUBRICATION Front Wheel Mount Lubricate with a grease gun, one zerk for each wheel mount, until the grease is forced out. Use only good quality bearing grease. Grease from well-known brand names (petrochemical companies) usually maintains a good quality. Front Wheel Bearings Lubricate with a grease gun, one zerk for each set of wheel bearings, until the grease is forced out. Use only good quality bearing grease.
TROUBLESHOOTING Problem Cause Engine will not start • Blade switch is engaged. • Steering controls are not locked in the neutral position • Parking brake is not activated • Battery is dead • Contamination in the carburetor or fuel line.
TROUBLESHOOTING Problem Cause Engine overheats • Clogged air intake or cooling fins • Engine overloaded • Poor ventilation around engine • Defective engine speed regulator • Too little or no oil in the engine • Contamination in the carburetor or fuel line.
STORAGE Winter Storage At the end of the mowing season, the machine should be readied for storage (or if it will not be in use for longer than 30 days). Fuel allowed to stand for long periods of time (30 days or more) can leave sticky residues that can plug the carburetor and disrupt engine function. Fuel stabilizers are an acceptable option as regards to the sticky residues that can occur during storage. Add stabilizer to the fuel in the tank or in the storage container.
schematics 49
TECHNICAL DATA RZ4621BF / 966582301 Engine Manufacturer Type Briggs & Stratton Endurance Power Lubrication 21 hp* Pressure with oil filter Oil capacity excluding filter 1.34 qts / 1.27 liters Oil capacity including filter 1.46 qts / 1.38 liters Engine oil (See viscosity diagram) Fuel SAE 10W30, 10W40, 5W20, 5W30, API SF-SJ Min 87 octane unleaded (Max ethanol 10%, Max MTBE 15%) Fuel tank capacity 3 gallons / 11.4 liters Spark plugs / gap Champion RC12YC .030" / 0.
TECHNICAL DATA RZ4621BF / 966582301 Frame Cutting Width 46" / 117cm Cutting Height 1.5 - 4" / 3.8 - 10.2 cm Uncut Circle 0 Number of Blades 2 Blade Length 22¾" / 57.8 cm Nose Rollers No Sprung Seat Standard Hinged Arm Rests Hour Meter Accessory Standard Blade Engagement Electromagnetic clutch Deck Construction Stamped Productivity 2.
TECHNICAL DATA Accessories Collection system Torque Specifications Engine crankshaft bolt Deck pulley bolts Lug nuts Blade bolt 50 ft/lb (67 Nm) 150 ft/lb (203 Nm) 75 ft/lb (100 Nm) 90 ft/lb (122 Nm) Standard ¼" fasteners Standard 5/16" fasteners Standard 3/8" fasteners Standard 7/16" fasteners Standard ½” fasteners 9 ft/lb (12 Nm) 18 ft/lb (25 Nm) 33 ft/lb (44 Nm) 52 ft/lb (70 Nm) 80 ft/lb (110 Nm) HEX HEAD CAP SCREWS The torque values shown should be used as a general guideline when specific torque
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. Take care of them as they are valuable documents.
SERVICE JOURNAL Date, mtr reading, stamp, sign Action Delivery Service Charge the battery. Adjust the tire pressure of all wheels to 15 PSI (1 bar). 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. Adjust the position of the steering controls. Fill with fuel and open the fuel shut off valve. Start the engine. Check that there is drive to both wheels. Check the mower deck adjustment.
SERVICE JOURNAL Action Date, mtr reading, stamp, sign Delivery Service Charge the battery. Action q Date, mtr reading, stamp, sign 25-Hour Service Check the fuel pump’s air filter. Sharpen/Replace mower blades if required. Check the tire pressures. Check battery with cables. Lubricate according to lubrication chart. Check/clean the engine’s cooling air intake. Clean the air cleaner’s pre-filter (foam).
SERVICE JOURNAL Action Date, mtr reading, stamp, sign 50-Hour Service Perform the 25-hour service. Clean/replace the air cleaner’s filter cartridge (paper filter (shorter intervals for dusty operating conditions). Change engine oil. Lubricate according to lubrication chart. Check/adjust the parking brake. Action q q q q q Date, mtr reading, stamp, sign 100-Hour Service Perform the 25-hour service. Perform the 50-hour service. Change the engine oil filter. Clean/replace the spark plugs.
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 pre-filter (foam). Action q q q q q q q Date, mtr reading, stamp, sign At Least Once Each Year Clean the engine’s cooling air intake (25 hours). Replace the air cleaner’s pre-filter (foam) (300 hours).
SERVICE JOURNAL Action Date, mtr reading, stamp, sign
P/N 115 355326R1 03/11/10
