Operator Manual MZ28T/ 966613201 Please read the operator’s manual carefully and make sure you understand the instructions before using the machine.
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. Modifications to the unit may cause unsafe operations or damage the unit.
CONTENTS INTRODUCTION.......................................................5 Driving and Transport on Public Roads..............5 Towing.................................................................5 Operating............................................................5 Good Service......................................................6 SYMBOLS AND DECALS..........................................7 SAFETY.....................................................................9 Safety Instructions...........
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 that is 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. 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.
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 Keep a safe distance from the machine Do not open or remove safety shields while engine is running Use on slopes no greater than 10° Careful backing up, watch for other people Noise emissions to the surroundings in accordance with the European Union’s directive.
SAFETY Safety Instructions These instructions are for your safety. Read them carefully. 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. • It is recommended that someone be aware that you are mowing and can provide help in case of injury or accident.
SAFETY • • • • • • • • • • 10 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. Wear proper Personal Protective Equipment (PPE) while operating this machine, including (at a minimum) sturdy footwear, eye protection, and hearing protection. Do not mow in shorts and/or footwear with open toes.
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 • • • 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. 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 out of the path of danger.
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. Gasoline is extremely flammable and the vapors are explosive. • Extinguish all cigarettes, cigars, pipes, and other sources of ignition. • Use only approved gasoline container.
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.
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.
SAFETY Transport • • • • • • • The machine is heavy and can cause serious crushing injuries. Be extra cautious when it is loaded on or unloaded from a vehicle or trailer. Use an approved trailer to transport the machine. Activate the parking brake, turn off the fuel supply, and fasten the machine with approved fastening devices, such as bands, chains, or straps, when transporting. Do not operate this machine on public roadways.
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 belt-driven hydraulic pumps. Using the left and right steering controls, the flow is regulated and thereby the direction and speed. Control Locations 3 2 4 5 1 13 5 12 6 11 7 8 10 9 8058-039 1. 2. 3. 4. 5. Motion control levers Parking brake Tracking knob Fuel tank Hydro release lever 6. 7.
CONTROLS Motion 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 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. The hour meter cannot be manually reset. 8058-043 Hour meter Blade Switch To engage the mower deck, pull the blade switch knob out. The mower blades are disengaged when the knob is pressed down fully.
CONTROLS Release the key to the RUN position when the engine has started. 8058-046 Ignition switch - RUN position For using “accessory”, turn the key counter clockwise. 8058-047 Ignition switch - accessory Parking Brake The parking brake is found on the left of the machine. Pull the lever backward to activate the brake and push forward to release it. IMPORTANT INFORMATION The machine must stand absolutely still when applying the parking brake. Always set the parking brake before dismounting.
CONTROLS Tracking Knob If the mower is not tracking straight, check the air pressure in both rear tires. Recommended air pressure is 10 psi. (.7 bar) for the front tires and 15 psi (1 bar) for the rear tires. Tracking must be checked on a flat and level concrete or blacktop surface. Rotating the tracking knob allows fine tuning adjustments so the machine tracks straight with the steering control levers in the full forward position.
CONTROLS Cutting Height Adjuster The desired cutting height is set with the height pin. The cutting height pedal releases the deck lift and places the deck at the selected height. For transport, push the lift pedal fully forward until the deck lift latches in the transport (highest) position. 2 1 1. Release pedal 2. Height pin Cut height selection pedals 8058-048 Seat Adjustment Lever The seat can be adjusted lengthways.
CONTROLS Refueling Read the safety instructions before refueling. The capacity for the tank is 5 gallons (19 liters). Regularly check the gas cap gasket for damage and keep the cap properly tightened. The engine will run on a minimum of 87-octane unleaded gasoline (no oil mix). Environmentally adapted alkylate gasoline can be used. See Technical Data concerning ethanol fuel. Methanol fuel is not allowed. Do not use E85 alcohol based fuel. Damage to the engine and components may occur.
OPERATION Read the Safety section and the following pages if you are unfamiliar with the machine. Training Due to unique steering capabilities, zero turn mowers are far more maneuverable than typical riding mowers. This section should be reviewed in its entirety prior to attempting to move the mower under its own power. When first operating the mower or until becoming comfortable with controls, use a reduced throttle speed and reduced ground speed.
OPERATION Before Starting 1. Read the sections on Safety and Controls before starting the machine. 2. Perform the daily maintenance before starting (see Maintenance Schedule in the Maintenance section). 3. Check that there is sufficient fuel in the fuel tank. 4. Adjust the seat to the desired position. 8011-441 Lengthways adjustment 5. Set the deck cutting height by inserting the lift pin into the desired cut height.
OPERATION Starting the Engine 1. Sit on the seat. 2. Raise the mower deck to the transport position by locking the lift pedal fully forward. 8058-048 Set mower deck to the transport position 3. Activate the parking brake. 8058-044 Activate parking brake before starting 4. Disengage the mower blades by pressing the blade switch downwards.
OPERATION 5. Move the steering controls outward to the locked (outer) neutral position. IMPORTANT INFORMATION The Briggs & Stratton engine on this unit is equipped with Electronic Fuel Management (EFM). The engine choke is automatically regulated during starting and warm up. 8061-040 Place controls in neutral position 6. Move the throttle to the middle position. 8058-051 Turn to the START position 7. Open the fuel tank valve.
OPERATION 8. 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 about 10 seconds before retrying. 8050-780 Turn to the start position 9. 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 The 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 the mower to start other vehicles.
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. 2. Move the steering controls to the neutral position (N). 8058-044 Parking brake 3. Release foot pedal latch and lower deck to set cutting height. WARNING! Make sure that no one is near mower when engaging blade switch.
OPERATION Operating on Hills Read the Safety Instructions Driving on Slopes in the Safety Instructions. • • • WARNING! IMPORTANT INFORMATION Do not drive up or down hills with slopes greater than 10 degrees. Do not drive across slopes. When control levers are in the reverse position they return to neutral when released. This may cause the mower to suddenly stop. The slowest speed possible should be used before starting up or down hills. Avoid stopping or changing speed on hills.
OPERATION Stopping the Engine 1. Move the throttle to the minimum position (tortoise symbol). 2. Move the steering controls outward. 3. Disengage the mower deck by depressing the blade switch. 8058-046 Disengage the mower deck and move throttle to minimum 4. Raise the mower deck by pressing the foot pedal forward to the transport position. 5. When the machine is standing still, activate the parking brake by pulling the lever upward.
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 Moving Machine By Hand Bypass Linkages When pushing or pulling the mower, engage the IZT (Integrated Zeroturn Transaxle) bypass linkages with the hydro release levers. The levers are located on each side of the rear of the unit below the rear engine plate. 1. Raise the deck to the highest (transport) position. 2. Pull the release levers up and out of the keyhole slots. Release the levers with the head outside the bracket and held into the bypass setting. 3.
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 section.
MAINTENANCE Daily MAINTENANCE Before After At least once each year Maintenance interval in hours 50 250 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 the hydraulic oil in the oil tank ● Change the hydraulic oil (every 500 hours) Replace
MAINTENANCE Battery STANDARD 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. • See chart for charging times. BATTERY STATE APPROXIMATE BATTERY CHARGING TIME* TO FULL CHARGE AT 80OF / 27OC OF CHARGE Maximum Rate at: 50 Amps 30 Amps 20 Amps 10 Amps 12.6V 100% - FULL CHARGE - 12.
MAINTENANCE Safety System This 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 Deck Belt Deck Belt Removal Park on a level surface. Apply park brake. Lower the deck into the lowest cutting position. 1. Remove foot plate and belt shields. 2. Using a ratchet or breaker bar with a 9/16" socket on the spring idler bolt, relieve the tension on the belt. 3. Remove any dirt or grass that may have accumulated around the cutter housings and entire deck surface. 4. Carefully roll the belt over the top of the cutter housing pulleys. 5.
MAINTENANCE Pump Belt The belts are not adjustable. Replace belts if they begin to slip from wear. Replacing Pump Belt Park the mower on a level surface. Engage the parking brake. Belt Removal From the top side of the deck: 1. Remove the deck belt (see Deck Belt Removal in this section of the manual). 2. Tilt seat forward to access fan covers. Remove both fan covers. From the underside of the mower: 3. Remove clutch stop to access the belt. 4.
MAINTENANCE Cutting Blades To attain the best mowing effect, it is important that blades are well sharpened and not damaged. Replace blades that have been bent or cracked when hitting obstacles. Let the service workshop decide whether a blade with large nicks can be repaired/ground or must be replaced. Balance the blades after sharpening. Check the blade mounts. Blade Replacement IMPORTANT INFORMATION The sharpening of blades should be carried out by an authorized service workshop.
MAINTENANCE Adjusting the Mower Deck Check the tire pressure before adjustment of the mower deck. See Tire Pressures in Maintenance section. Faulty mower deck adjustments will cause an uneven mowing result. 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 / Transmission. If tires are under or over inflated, you cannot properly adjust your deck. Four slots control the height and pitch of the mower deck.
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. Antiscalp 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. Anti-scalp rollers can be set in three positions: • Upper position 1½ to 3" (38 to 76 mm) grass.
MAINTENANCE Caster Wheels Check every 200 hours. Make sure that wheels rotate freely. IMPORTANT INFORMATION DO NOT add any type of tire liner or foam fill material to the tires. Excessive loads created by foam tires will cause premature failures. Use only O.E.M. specified tires. Removal and Installation Remove nut and caster bolt. Pull the wheel out of the fork. To reInstall, reverse the order. Tighten caster bolt. If wheels do not rotate freely, take the unit to the dealer for service.
LUBRICATION Lubrication Schedule 8058-056 12/12 Every year 1/52 Every Week 1/365 Every day Lubricate with grease gun Level check Oil change Filter change * Change hydraulic drive filters. p See Engine Manufacturer's manual 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 high grade molybdenum disulphide grease.
LUBRICATION Wheel and Deck Zerks Use only good quality bearing grease. Grease from well-known brand names (petrochemical companies, etc.) usually maintains a good quality. Front Wheel Mount Lubricate with a grease gun until the grease is forced out. Front Wheel Bearings Lubricate 3-4 strokes with a grease gun on each set of wheel bearings. 8058-057 Lubricating front wheels Deck Spindles Lower the cutting deck completely. If a grease gun without rubber hose is used, the foot plate must be removed.
LUBRICATION Transaxle (Transmission) Fluid Change This transaxle is designed with an external filter for ease of maintenance. To ensure constant fluid quality levels and longer life, an oil filter change interval of every 200 hours is recommended. The following procedure is performed with the transaxles installed in the mower and the mower on level ground. Apply the pump release valve for each transaxle and set the parking brake. 1. Remove the three ¼" filter guard screws and filter guard.
LUBRICATION Purging Procedures Due to the effects air has on efficiency in hydrostatic drive applications, it is critical to purge 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. Resulting symptoms in hydrostatic systems may be: • Noisy operation. • Lack of power or drive after short term operation. • High operation temperature and excessive expansion of oil.
TROUBLESHOOTING GUIDE Problem Engine will not start Starter does not turn the engine over Engine runs rough Engine seems weak Cause • 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 • Fuel supply is closed • Clogged fuel filter or fuel line • Faulty ignition system • Dead battery • Poor contacts on the battery terminal cable connections • Fuse blown •
TROUBLESHOOTING GUIDE Problem Machine vibrates Engine overheats Battery not charging Machine moves slowly, unevenly, or not at all Mower deck not engaging Uneven mowing results 50 Cause • Blades are loose • Blades are incorrectly balanced • Engine is loose • Clogged air intake or cooling fins • Engine overloaded • Poor ventilation around engine • Defective engine speed regulator • Too little or no oil in the engine • Fouled spark plug • Poor contact with battery terminal cable conn
STORAGE Winter Storage The machine should be readied for storage at the end of the mowing season 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.
LEFT MOTION CONTROL LEVER RIGHT MOTION CONTROL LEVER YEL YEL BLU SEAT SW. T-6 T-1 TIMER T-2 YEL YEL BLK WHT BRN BRAKE SWITCH GRN ELECTRIC CLUTCH T-4 T-3 T-5 BRN/WHT BLK BRN BRN YEL SOLENOID BLK ENGINE GROUND BLK PTO SWITCH WHT GRN BLU BLK GRN BLK 7.5 AMP PUR PUR BRN PUR GRN WHT GRY TO ENGINE PIGTAIL L M S B A Y BLK YEL/RED RED 20 AMP ACCESSORY OUTLET RED/BLK RED/BLK BLK G HOURMETER PUR PUR YEL NOTES: 1. SEAT UNOCCUPIED 2.
TECHNICAL DATA MZ28ZT / 966613201 Engine Manufacturer Type Power Lubrication Fuel Fuel tanks capacity Cooling Alternator Starter Briggs & Stratton 1) Endurance 15.65 kW @ 2950 RPM 2) Pressure w/ Oil Filter Min 87 octane unleaded (Max ethyl alcohol 10%, Max MTBE 15%) 5 gallons / 9 liters Air cooled 12v 15 amp @ 3600 rpm Electric Transmission Transmission Speed and direction controls ZT-3400 Hydro Gear Dual levers, foam gripped Speed forward 0-10 mph - 0-16.1 Km/h Speed reverse 0-5 mph - 0-9.
TECHNICAL DATA MZ28ZT / 966613201 Frame Cutting Width 132 cm / 52" Cutting Height 3.8 - 11.4 cm / 1½ - 4½" Uncut Circle 0 Number of Blades 3 Blade Length 46 cm / 18" Nose Roller No Sprung Seat Suspension Hinged Arm Rests Yes Hour Meter Yes Blade Engagement 200 ft-lb Warner Clutch Deck Construction 11 gauge fabricated Productivity 12141 m2/h / 3.
TECHNICAL DATA Torque Specifications Hex Head Cap Screws The torque values shown should be used as a general guideline when specific torque values are not given. U.S. Standard Hardware Shank Size (Diameter in inches, fine or coarse thread) Grade SAE Grade 5 SAE Grade 8 Flangelock Screw w/Flangelock Nut Size ft./lbs Nm ft./lbs Nm ft.
CONFORMITY CERTIFICATES Conformity Certificates For Model Listed Below: 966613201 / MZ28T Zero Turn Rider 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.
SERVICE JOURNAL Action Date, mtr reading, stamp, sign 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 Check: Safe
SERVICE JOURNAL Action After 10 hours Change the engine oil Check hydraulic oil level Inspect hydraulic hoses Inspect hydraulic belt Inspect hydraulic filter Check neutral position Check safety system Check seat belt Check fuel system for leaks Inspect safety guards and shields Check brake adjustment 58 Date, mtr reading, stamp, sign
SERVICE JOURNAL Action Date, mtr reading, stamp, sign Daily Service Clean debris from mower Check engine oil level Check the tire pressures Check underside of deck Inspect deck pulleys Check/clean the engine’s cooling air intake Check safety system Check seat belt Check fuel system for leaks Inspect safety guards and shields Check brake adjustment 59
SERVICE JOURNAL Action 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) 60 Date, mtr reading, stamp, sign
SERVICE JOURNAL Action Date, mtr reading, stamp, sign 100-Hour Service Grease fittings (caster pivots and caster wheels) Inspect dampeners Inspect frame Inspect throttle cable Inspect hardware Check the tire pressures Change the engine oil and filter Change air filter Inspect spark plug Inspect fuel filter Check engine RPM Clean underside of deck Check blade pitch Grease blade spindles Inspect spindle bearings Inspect deck belt and blades Inspect idler arm bearings Inspect deck idler pulleys Check hydraul
SERVICE JOURNAL Action 300-Hour Service Grease fittings (caster pivots and caster wheels) Inspect dampeners Inspect frame Inspect throttle cable Inspect hardware Check the tire pressures Change the engine oil and filter Change air filter Inspect spark plug Inspect fuel filter Check engine RPM Clean underside of deck Check blade pitch Grease blade spindles Inspect spindle bearings Inspect deck belt and blades Inspect idler arm bearings Inspect deck idler pulleys Change hydraulic oil Change hydraulic filter
SERVICE JOURNAL Action Date, mtr reading, stamp, sign At least once each year Clean the engine’s cooling air intake. Replace the air cleaner’s pre-filter (foam). Replace the air filter’s paper cartridge. Change the engine oil.
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