Form No. 3363-841 Rev A TITAN ZX4800 Zero-Turn-Radius Riding Mower Model No. 74912—Serial No. 310000001 and Up G009968 To register your product or download an Operator's Manual or Parts Catalog at no charge, go to www.Toro.com.
This machine is a ride-on, rotary-blade lawnmower intended to be used by homeowners in residential applications. It is primarily designed for cutting grass on well-maintained lawns. It is not designed for cutting brush, mowing grass and other growth alongside highways, or for agricultural uses. G009950 This product complies with all relevant European directives, for details please see the separate product specific Declaration of Conformity (DOC) sheet.
Contents Checking the Tire Pressure ................................. 38 Hydraulic System Maintenance ............................... 38 Checking the Hydraulic Oil Level........................ 38 Changing the Hydraulic System Filter and Oil.................................................................. 38 Mower Deck Maintenance ...................................... 40 Servicing the Cutting Blades ............................... 40 Mower Deck Leveling.........................................
Safety ◊ lack of awareness of the effect of ground conditions, especially slopes; ◊ incorrect hitching and load distribution. Safe Operation Practices for Ride-on (riding) Rotary Lawnmower Machines Preparation • While mowing, always wear substantial footwear and long trousers. Do not operate the equipment when barefoot or wearing open sandals. • Thoroughly inspect the area where the equipment is to be used and remove all objects which may be thrown by the machine. • Warning-Fuel is highly flammable.
– use low speeds on slopes and during tight turns; • Reduce the throttle setting during engine run-out and, if the engine is provided with a shut-off valve, turn the fuel off at the conclusion of mowing. • Lightning can cause severe injury or death. If lightning is seen or thunder is heard in the area, do not operate the machine; seek shelter. – stay alert for humps and hollows and other hidden hazards; • Use care when pulling loads. – Use only approved drawbar hitch points.
Slope Operation Sound power level was determined according to the procedures outlined in EN 836. • Do not mow slopes greater than 15 degrees. • Do not mow near drop-offs, ditches, steep banks, or water. Wheels dropping over edges can cause rollovers, which may result in serious injury, death, or drowning. Hand-Arm Vibration Measured vibration level for right hand = 1.9 m/s2 Measured vibration level for left hand = 1.8 m/s2 • Do not mow slopes when grass is wet.
Slope Indicator G011841 Figure 3 This page may be copied for personal use. 1. The maximum slope you can safely operate the machine on is 15 degrees. Use the slope chart to determine the degree of slope of hills before operating. Do not operate this machine on a slope greater than 15 degrees. Fold along the appropriate line to match the recommended slope. 2. Align this edge with a vertical surface, a tree, building, fence pole, etc. 3. Example of how to compare slope with folded edge.
Safety and Instructional Decals Safety decals and instructions are easily visible to the operator and are located near any area of potential danger. Replace any decal that is damaged or lost. 115-9631 1. Power take-off (PTO), Blade control switch on some models 2. Blade control switch—On 99-8936 1. Machine speed 2. Fast 3. Slow 4. Neutral 5. Reverse 3. Blade control switch—Off 4. Choke 5. Fast 6. Continuous variable setting 7. Slow 114-1606 1. Entanglement hazard, belt—keep all guards in place.
110-6691 1. Thrown object hazard—keep bystanders a safe distance from the machine. 2. Thrown object hazard, mower—do not operate without the deflector, discharge cover, or grass collection system in place. 3. Cutting/dismemberment of hand or foot—stay away from moving parts. 112-9840 1. Read the Operator’s Manual. 3. Remove the ignition key and read the instructions before servicing or performing maintenance. 115-9644 1. Press the pedal and lift the height of cut lever to unlock the deck position. 2.
9-8965 1. Warning–read the Operator’s Manual. 2. Read the instructions before servicing or performing maintenance; apply parking brake, remove the ignition key and disconnect the spark plug wire. 3. Thrown object hazard—keep bystanders a safe distance from the machine, pick up debris before operating, keep the discharge deflector in place. 4. Loss of traction/control hazard, slopes–loss of traction/control on slope, disengage the blade control switch (PTO), proceed off the slope slowly. 5.
7–7490 1. Fuel 2. Full 3. Half 11 4.
Product Overview 2 1 10 3 4 5 9 6 8 G010001 7 Figure 4 1. Motion control levers 2. Operator seat 3. Parking brake 4. Fuel gauge 5. Footrest 6. Front caster wheel 7. Anti-scalp roller 8. Deflector 9. Foot pedal deck lift and height-of-cut 10. Control panel 1 2 6 5 3 4 G010009 Figure 5 1. Gas tank cap 2. Mower Deck 3. Washout port 4. Drive wheel 5. Engine guard 6.
Controls Become familiar with all the controls before you start the engine and operate the machine (Figure 6). G010016 1 2 1 4 3 G009918 Figure 6 1. Throttle and choke control 2. Hour meter 3. Ignition switch 4. Blade control switch (PTO) 5. Fuses G010077 Figure 7 1. Fuel gauge window Ignition Switch Motion Control Levers The ignition switch has three positions: Start, Run and Off. The key will turn to Start and move back to Run upon release.
Attachments/Accessories Operation A selection of Toro approved attachments and accessories are available for use with the machine to enhance and expand its capabilities. Contact your Authorized Service Dealer or Distributor or go to www.Toro.com for a list of all approved attachments and accessories. Note: Determine the left and right sides of the machine from the normal operating position. Think Safety First Please carefully read all of the safety instructions and decals in the safety section.
DANGER In certain conditions, gasoline is extremely flammable and highly explosive. A fire or explosion from gasoline can burn you and others and can damage property. • Fill the fuel tank outdoors, in an open area, when the engine is cold. Wipe up any gasoline that spills. • Never fill the fuel tank inside an enclosed trailer. • Do not fill the fuel tank completely full. Add gasoline to the fuel tank until the level is 1/4 to 1/2 inch (6 to 13 mm) below the bottom of the filler neck.
WARNING Gasoline is harmful or fatal if swallowed. Long-term exposure to vapors can cause serious injury and illness. G010016 • Avoid prolonged breathing of vapors. • Keep face away from nozzle and gas tank or conditioner opening. 1 • Keep gas away from eyes and skin. Using Stabilizer/Conditioner Use a fuel stabilizer/conditioner in the machine to provide the following benefits: • Keeps gasoline fresh during storage of 90 days or less. For longer storage it is recommended that the fuel tank be drained.
Releasing the Parking Brake 1 2 G010016 1 2 G010079 Figure 12 3 Operating the Throttle The throttle control can be moved between Fast and Slow positions (Figure 13). Always use the fast position when turning on the mower deck with the blade control switch (PTO). 4 G010475 G010289 Figure 10 Figure 13 Checking the Engine Oil Level Before you start the engine and use the machine, check the oil level in the engine crankcase; refer to Checking the Engine Oil Level.
Operating the Ignition Switch 1 2 3 4 1. Turn the ignition key to the Start position (Figure 15). When the engines starts, release the key. Important: Do not engage starter for more than 5 seconds at a time. If the engine fails to start allow a 15 second cool-down period between attempts. Failure to follow these instructions can burn out the starter motor. Note: Additional starting cycles may be required when starting the engine for the first time after the fuel system has been without fuel completely.
Stopping the Engine CAUTION Children or bystanders may be injured if they move or attempt to operate the tractor while it is unattended. G008945 Always remove the ignition key and set the parking brake when leaving the machine unattended, even if just for a few minutes.
Testing the Safety Interlock System Using the Motion Control Levers Test the safety interlock system before you use the machine each time. If the safety system does not operate as described below, have an Authorized Service Dealer repair the safety system immediately. 1. While sitting on the seat, engage the parking brake and move the blade control switch to On. Try starting the engine; the engine should not crank. 2.
Stopping the Machine To stop the machine, move the traction control levers to neutral and move to locked position, disengage the blade control switch (PTO), and turn the ignition key to off. Set the parking brake when you leave the machine; refer to Setting the Parking Brake. Remember to remove the key from the ignition switch. CAUTION Children or bystanders may be injured if they move or attempt to operate the tractor while it is unattended.
1 G010016 5 4 3 2 G010236 Figure 25 1. Deck lift pedal 2. Cut height pin 4. Lock position. lowest height-of-cut (use only for deck removal) 5. Lock position. transport position 3. Height-of-cut positions Using the Lock Positions G010219 The deck can be locked in the highest height-of-cut or transport position or the lowest height-of-cut position. 1. Push on the deck lift pedal with your foot and raise the mower deck to the transport position (also the 4.
Changing the Seat Ride Suspension 4 The number of seat springs can be changed to maximize rider comfort. More springs should be used with heavier operators and on rough terrain. Fewer springs should be used with lighter operators and when mowing smooth, well established lawns. Always keep the number of springs on the left and right side the same when adding and removing springs. G010233 3 1 2 Figure 26 1. Anti-scalp roller 2. Bolt 4 3. Flange Nut 4.
1 Pushing the Machine by Hand 2 Important: Always push the machine by hand. Never tow the machine because damage may occur. 3 4 To Push the Machine 1. Park the machine on a level surface and disengage the blade control switch. 2. Move the motion control levers outward to neutral lock position, stop the engine, remove the key, and wait for all moving parts to stop before leaving the operating position. Make sure the parking brake is disengaged. 3.
To Operate the Machine 1 G012841 Move the bypass to the position for pushing the machine (Figure 31) to engage the wheel motors. 1 Converting to Side Discharge The mower deck and mower blades shipped with this machine were designed for optimum mulching performance. Side discharge performance can be improved by replacing the mulching blades with standard cutting blades obtained from your local authorized Toro dealer.
1 13. Locate the cut off baffle in the loose parts bag. Remove the fasteners at the rear holes of the discharge plate. Install the baffle at the side discharge opening on the mower deck (Figure 35). 2 1 2 3 3 4 2 3 G012806 4 Figure 33 1. Baffle guard 2. Lock nut (5/16 inch) G012800 3. Carriage bolt (5/16 x 3/4 inch) 4. Right baffle Figure 35 1. Carriage bolt, existing 10. Locate the baffle guard at the front edge of the side discharge opening.
Mow at Correct Intervals DANGER Normally, mow every four days. But remember, grass grows at different rates at different times. So to maintain the same cutting height, which is a good practice, mow more often in early spring. As the grass growth rate slows in mid summer, mow less frequently. If you cannot mow for an extended period, first mow at a high cutting height; then mow again two days later at a lower height setting.
Maintenance Recommended Maintenance Schedule(s) Maintenance Service Interval Maintenance Procedure After the first 8 hours • Change the engine oil. After the first 50 hours • Change the hydraulic system filter and oil. Before each use or daily • • • • • • • Check the safety interlock system. Check the air cleaner for dirty, loose or damaged parts. Check the engine oil level. Check air intake and cooling areas, clean as necessary. Check the mower blades.
Figure 36 Located on the seat pan underside 1. Read the Operator’s Manual before performing any maintenance. 2. Check the engine oil every 8 hours 3. Check the drive wheel tire pressure every 25 hours 4. Check the hydraulic oil every 25 hours 5. Check the caster wheel tire pressure every 25 hours 6.
Premaintenance Procedures Lubrication Raising the Seat Service Interval: Every 25 hours—Grease all lubrication points. Greasing the Bearings Make sure the motion control levers are locked in the neutral lock position. Lift the seat forward. Grease Type: No. 2 General Purpose Lithium Base Grease The following components can be accessed by raising the seat: 1. Park the machine on a level surface and disengage the blade control switch. • Service decal 2.
Engine Maintenance 1 2 3 WARNING Contact with hot surfaces may cause personal injury. 5 Keep hands, feet, face, clothing and other body parts away the muffler and other hot surfaces. 4 Servicing the Air Cleaner 6 Service Interval: Before each use or daily—Check the air cleaner for dirty, loose or damaged parts. G010338 Figure 38 1. Air cleaner cover 2. Air cleaner latch 3. Air cleaner Every 25 hours/Yearly (whichever comes first)—Service the foam element.
Checking the Engine Oil Level Replace the air cleaner element yearly, or every 100 hours. 1. Open the air cleaner cover door on the blower housing to access the air cleaner element (Figure 38). 2. Unhook the latch and remove the air cleaner(Figure 38). 3. Remove the foam element and inspect. Clean and replace as necessary. 4. Gently tap the paper element to dislodge dirt. Do not wash the paper element or use pressurized air, as this will damage the element. Replace a dirty, bent, or damaged element.
low, add oil of the proper type up to the full mark. Reinstall oil fill cap/dipstick and screw tight. Changing the Engine Oil G009950 Service Interval: After the first 8 hours Every 100 hours (more often under dusty, dirty conditions) 1 2 3 4 5 6 Note: Dispose of the used oil at a recycling center. 1. Start the engine and let it run five minutes. This warms the oil so it drains better. 2.
Note: Ensure the oil filter gasket touches the engine and then an extra 3/4 turn is completed. 3. Fill the crankcase with the proper type of new oil; refer to Changing the Oil. 5. Slowly pour approximately 80% of the specified oil into the filler tube and slowly add the additional oil to bring it to the Full mark. 6. Install the oil fill cap/dipstick. 7. Check the oil level; refer to Checking the Oil Level. Servicing the Spark Plug 8. Slowly add additional oil to bring it to the full mark.
Fuel System Maintenance 2 1 Replacing the Fuel Filter Service Interval: Every 500 hours/Yearly (whichever comes first) (more often under dusty, dirty conditions). G008794 Figure 43 1. Disengage the blade control switch (PTO), move the motion control levers to the neutral lock position, and set the parking brake. Installing the Spark Plug 2. Stop the engine, remove the key, and wait for all moving parts to stop before leaving the operating position. Tighten the spark plug to 18-22 ft-lb (25-29 N-m).
Electrical System Maintenance G010340 Servicing the Battery Service Interval: Monthly 1 2 3 4 DANGER Battery electrolyte contains sulfuric acid which is a deadly poison and causes severe burns. Do not drink electrolyte and avoid contact with skin, eyes or clothing. Wear safety glasses to shield your eyes and rubber gloves to protect your hands. Removing the Battery WARNING Battery terminals or metal tools could short against metal machine components causing sparks.
Charging the Battery 2. To replace the fuses, pull out on the fuse to remove it. WARNING 3. Install a new fuse (Figure 48). Charging the battery produces gasses that can explode. Never smoke near the battery and keep sparks and flames away from battery. G010340 Important: Always keep the battery fully charged. This is especially important to prevent battery damage when the temperature is below 32°F (0°C). 1 25 30 1. Charge battery for 10 to 15 minutes at 25 to 30 amps or 30 minutes at 10 amps.
Drive System Maintenance Hydraulic System Maintenance Oil Type: 20w-50 engine oil. Checking the Tire Pressure Important: Use oil specified or equivalent. Other fluids could cause system damage. Service Interval: Every 25 hours—Check tire pressure. Maintain the air pressure in the front and rear tires as specified. Uneven tire pressure can cause uneven cut. Check the pressure at the valve stem (Figure 49). Check the tires when they are cold to get the most accurate pressure reading.
result in irreparable damage to the transaxle drive system. 1 2 3 4 Removing Hydraulic System Filters 1. Stop engine, wait for all moving parts to stop, and allow engine to cool. Remove the key and engage the parking brake. 2. Locate the filter and guards on each transaxle drive system (Figure 51). Remove three screws securing the filter guard and guard. 5 G010254 1 5 6 2 3/4 3 G008748 Figure 52 4 Figure 51 Right side shown 1. Transaxle drive 2. Oil filter 3. Filter guard 1.
Mower Deck Maintenance Servicing the Cutting Blades 1 Maintain sharp blades throughout the cutting season because sharp blades cut cleanly without tearing or shredding the grass blades. Tearing and shredding turns grass brown at the edges, which slows growth and increases the chance of disease. G010333 Figure 53 Check the cutter blades daily for sharpness, and for any wear or damage. File down any nicks and sharpen the blades as necessary.
3. Measure from the tip of the blade to the flat surface here. 1 Figure 54 1. Cutting Edge 2. Curved Area 3. Wear/slot Forming 4. Crack G009680 3 2 Figure 56 Checking for Bent Blades 1. Blade, in position for measuring 2. Level surface 3. Measured distance between blade and surface (A) Note: The machine must be on a level surface for the following procedure. 1. Raise the mower deck to the highest height-of-cut position; also considered the ’transport’ position. 4.
1 G009680 3 2 1 Figure 58 2 3 1. Opposing blade edge, in position for measuring 2. Level surface 3. Second measured distance between blade and surface (B) 4 G010341 Figure 59 WARNING 1. Sail Area of Blade 2. Blade A blade that is bent or damaged could break apart and could seriously injure or kill you or bystanders. 3. Curved washer 4. Blade Bolt Sharpening the Blades • Always replace bent or damaged blade with a new blade.
are not within 3/16 inch (5 mm), an adjustment is required; continue to the Leveling procedure. Figure 61 1. Blade 2. Balancer Installing the Blades 1. Install the blade onto the spindle shaft (Figure 59). Important: The curved part of the blade must be pointing upward toward the inside of the mower to ensure proper cutting. 2. Install the spring disk and blade bolt. The spring disk cone must be installed toward the bolt head (Figure 59). Torque the blade bolt to 100-110 ft-lb (135-150 N-m).
deck lift foot lever is pushed back against the stop, then tighten the four leveling adjust locking nuts (Figure 65). 1 1 6 2 3 3 5 4 Figure 63 1. Blades front to rear 3. Measure from the tip of the blade to the flat surface here 2. Outside cutting edges G010342 Leveling the Mower Deck 1. Set anti-scalp rollers to top holes or remove completely for this procedure. Figure 65 54 inch Mower Decks 2. Set the height-of-cut lever to the 3 inch (76 mm) position. 1. Deck lift arm 2. Deck hanger 4.
5. Recheck that blocks fit just snugly under the deck skirt. Make sure all attachment bolts are tight 1 2 6. Verify the deck is level by checking the side-to-side level and front-to-rear blade slope; repeat deck leveling procedure if necessary. Inspecting the Belts 3 Service Interval: Every 50 hours Check the belts for squealing when the belt is rotating, blades slipping when cutting grass, frayed belt edges, burn marks and cracks are signs of a worn mower belt.
Installing the Mower 1. Park the machine on a level surface and disengage the blade control switch. 1 2. Move the motion control levers outward to the neutral lock position, stop the engine, remove the key, and wait for all moving parts to stop before leaving the operating position. 2 3. Slide the mower under the machine. 4. Lower the height-of-cut lever to the lowest position. Place the height-of-cut pin in the lock position for lowest height-of-cut. 3 4 5.
Cleaning 2 Washing the Underside of the Mower 1 Service Interval: Before each use or daily—Clean the mower housing. 3 Wash the underside of the mower after each use to prevent grass buildup for improved mulch action and clipping dispersal. 1. Park the machine on a level surface and disengage the blade control switch. 2. Move the motion control levers outward to the neutral lock position, stop the engine, remove the key, and wait for all moving parts to stop before leaving the operating position.
Storage 6. Disengage the blade control switch, stop the engine, and remove the ignition key. Wait for all moving parts to stop. Cleaning and Storage 7. Turn the water off and remove the coupling from the washout fitting. 1. Disengage the blade control switch (PTO), set the parking brake, and turn the ignition key to Off. Remove the key. 2. Remove grass clippings, dirt, and grime from the external parts of the entire machine, especially the engine and hydraulic system.
B. Run the engine to distribute conditioned fuel through the fuel system (5 minutes). C. Stop the engine, allow it to cool, and drain the fuel tank; refer to Servicing the Fuel Tank in the Maintenance Section. D. Restart the engine and run it until it stops. E. Dispose of fuel properly. Recycle as per local codes. Important: Do not store stabilizer/conditioned fuel over 90 days. 13. Check and tighten all bolts, nuts, and screws. Repair or replace any part that is damaged. 14.
Troubleshooting Problem Starter does not crank Engine will not start, starts hard, or fails to keep running Possible Cause 1. Blade control switch (PTO) is engaged. 1. Move blade control switch (PTO) to disengaged. 2. Parking brake is not on. 3. Drive levers are not in neutral lock position. 4. Operator is not seated. 5. Battery is dead. 6. Electrical connections are corroded or loose. 7. Fuse is blown. 8. Relay or switch is defective. 2. Set the parking brake. 3.
Problem Machine does not drive. Abnormal vibration. Uneven cutting height. Possible Cause 1. By pass valves is not closed tight. 1. Tighten the by pass valves. 2. 3. 4. 5. 2. 3. 4. 5. Pump belt is worn, loose or broken. Pump belt is off a pulley. Broken or missing idler spring. Hydraulic oil level is low or too hot. Change the belt. Change the belt. Replace the spring. Add hydraulic oil to reservoirs or let it cool down. 1. Cutting blade(s) is/are bent or unbalanced. 1.
Schematics G012083 Wire Diagram (Rev.
Notes: 53
Notes: 54
Notes: 55
TITAN Mowers The Toro Total Coverage Guarantee A Three-Year Limited Warranty Conditions and Products Covered The Toro® Company and its affiliate, Toro Warranty Company, pursuant to an agreement between them, jointly promise to repair any Toro Product, if defective in materials or workmanship for the period listed below. Instructions for Obtaining Warranty Service If you think that your Toro Product contains a defect in materials or workmanship, follow this procedure: 1.
