Form No. 3371-826 Rev A TITAN ZX4820 or ZX5420 Zero-Turn-Radius Riding Mower Model No. 74920—Serial No. 312000001 and Up Model No. 74924—Serial No. 312000001 and Up 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. This product complies with all relevant European directives, for details please see the separate product specific Declaration of Conformity (DOC) sheet.
WARNING Removing standard original equipment parts and accessories may alter the warranty, traction, and safety of the machine. Failure to use original Toro parts could cause serious injury or death. Making unauthorized changes to the engine, fuel or venting system, may violate EPA and CARB regulations. Replace all parts including, but not limited to, tires, belts, blades, and fuel system components with original Toro parts.
Contents Replacing the Fuel Filter ..................................... 41 Electrical System Maintenance................................ 42 Servicing the Battery........................................... 42 Servicing the Fuses ............................................. 43 Drive System Maintenance ..................................... 44 Checking the Tire Pressure ................................. 44 Hydraulic System Maintenance ............................... 45 Checking the Hydraulic Oil Level.......
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 • Lower the rollbar only when absolutely necessary. Do not wear the seat belt with the roll bar folded down. • 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. • Check carefully for overhead clearances (i.e. branches, doorways, electrical wires) before driving under any objects and do not contact them.
Sound Pressure This unit has a sound pressure level at the operator’s ear of 93 dBA, which includes an Uncertainty Value (K) of 1 dBA. Sound power level was determined according to the procedures outlined in EN 836. Hand-Arm Vibration Measured vibration level for left hand = 3.1 m/s2 Measured vibration level for right hand = 2.7 m/s2 Uncertainty Value (K) = 1.5 m/s2 Measured values were determined according to the procedures outlined in EN 836. Whole Body Vibration Measured vibration level = 0.
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. 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. 99-8936 1. Machine speed 4. Neutral 2.
93-7009 1. Warning—do not operate the mower with the deflector up or removed; keep the deflector in place. 2. Cutting/dismemberment hazard of hand or foot, mower blade—stay away from moving parts. Battery Symbols Some or all of these symbols are on your battery 1. Explosion hazard 6. Keep bystanders a safe distance from the battery. 2. No fire, open flame, or smoking. 7. Wear eye protection; explosive gases can cause blindness and other injuries. 3. Caustic liquid/chemical burn hazard 4.
Manufacturer's Mark 1. Indicates the blade is identified as a part from the original machine manufacturer. 114-1606 1. Entanglement hazard, belt—keep all guards in place. 115-9632 1. Power take-off (PTO), Blade control switch on some models 2. Blade control switch—On 3. Blade control switch—Off 4. Choke 5. Fast 6. Continuous variable setting 7. Slow 117-1194 1.
120-5466 1. Warning—read the Operator's Manual. 5. Loss of traction/control hazard, slopes—loss of traction/control on a slope, disengage the blade control switch (PTO), proceed off the slope slowly. 2. Warning—read the instructions before servicing or performing maintenance; move the motion control levers to the park (brake) position, remove the ignition key and disconnect the spark plug wire. 6.
115-9630 1. Read the Operator's Manual before performing any maintenance. 2. Check the engine oil every 8 hours 4. Check the hydraulic oil every 25 hours 3. Check the drive wheel tire pressure every 25 hours 6. Lubricate the caster wheel every 25 hours 5. Check the caster wheel tire pressure every 25 hours 119-8983 1. Fuel 2. Full 3. Half 14 4.
119-8986 1. Fuel 2. Full 3. Half 15 4.
Product Overview 2 3 4 1 5 6 10 G015763 9 7 8 Figure 4 1. Drive wheel 2. Operator seat 4. Motion control levers 5. Parking brake 7. Front caster wheel 8. Anti-scalp roller 3. Roll over protection system (ROPS) 6. Footrest 9. Foot pedal deck lift and height-of-cut 10. Deflector 3 G014766 1 4 2 Figure 5 1. Mower Deck 3. Engine 2. Drive wheel 4.
Controls switch (PTO) is engaged. Use these times for scheduling regular maintenance (Figure 6). Become familiar with all the controls before you start the engine and operate the machine (Figure 6). 1 2 Fuel Gauge The fuel window located below the operator position can be used to verify the level of gasoline in the tank (Figure 7). 3 1 5 4 g017722 Figure 6 1. Throttle control 4. Ignition switch 2. Choke 5. Blade control switch (PTO) 3. Hour meter G010077 Figure 7 Ignition Switch 1.
Height-of-Cut Lever Operation The height-of-cut lever works with the foot pedal to lock the deck in a specific cutting height. Only adjust the height of cut while machine is not moving (Figure 4). Note: Determine the left and right sides of the machine from the normal operating position. Attachments/Accessories Think Safety First A selection of Toro approved attachments and accessories are available for use with the machine to enhance and expand its capabilities.
1 2 3 G015033 Figure 8 1. Safe Zone-use the machine here 2. Use walk behind mower and/or hand trimmer near drop-offs and water. 3. Water G015034 Figure 9 Important: Always use the seat belt with the roll bar in the raised position. 3. Install the locking pins. Secure the pins by installing the hair cotter pin (Figure 10). Using the Rollover Protection System (ROPS) G015035 WARNING 2 1 To avoid injury or death from rollover: keep the roll bar in the raised locked position and use the seat belt.
• Do Not use gasoline containing methanol. DANGER • Do Not store fuel either in the fuel tank or fuel containers over the winter unless a fuel stabilizer is used. 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. • Do Not add oil to gasoline. • Fill the fuel tank outdoors, in an open area, when the engine is cold. Wipe up any gasoline that spills.
1 2 1 3 G010077 Figure 11 1. Fuel gauge window 4 Filling the Fuel Tank Make sure the engine is shut off and the motion controls are in the park position. G010475 Figure 12 Important: Do Not overfill fuel tank. Fill the fuel tank to the bottom of the filler neck. The empty space in the tank allows the fuel to expand. Overfilling may result in fuel leakage or damage to the engine or emission system. 3. Install the fuel tank cap securely and tighten until it “clicks”.
Releasing the Parking Brake 1 2 1 G010079 Figure 14 Operating the Throttle 2 The throttle control can be moved between Fast and Slow positions (Figure 15). G008959 Figure 16 Always use the fast position when turning on the mower deck with the blade control switch (PTO). 1. On 2. Off Operating the Ignition Switch 1. Turn the ignition key to the Start position (Figure 17). When the engines starts, release the key. G008946 Important: Do not engage starter for more than 5 seconds at a time.
Starting and Stopping the Engine 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. Starting the Engine 1. Sit down on the seat (Figure 18) and fasten the seat belt. 2. Move the motion controls outward to the neutral lock position (Figure 18). 3. Set the parking brake (Figure 18); refer to Setting the Parking Brake.
1 2 G008945 Figure 21 3 4 T AR ST Disengaging the Blade Control Switch (PTO) N RU O ST P 5 G009174 Figure 22 G017771 The Safety Interlock System Figure 20 WARNING Operating the Mower Blade Control Switch (PTO) If safety interlock switches are disconnected or damaged the machine could operate unexpectedly causing personal injury. The blade control switch (PTO) starts and stops the mower blades and any powered attachments. • Do not tamper with the interlock switches.
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.
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. Always remove the ignition key and set the parking brake when leaving the machine unattended, even if just for a few minutes.
Adjusting the Height-of-Cut 2. Remove the pin from the height-of-cut bracket (Figure 27). 3. Select the lower hole on the lock decal and insert the pin (Figure 27). The height-of-cut can be adjusted from 1-1/2 to 4-1/2 inch (38 to 114 mm) in 1/4 inch (6 mm) increments by relocating the height-of-cut pin into different hole locations. To lock the deck in 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.
While sitting in the operator's position, raise the seat adjustment lever slightly and move the seat forward or backward to the desired position (Figure 29). 1. Loosen the upper bolt holding the control lever to the control arm shaft. 2. Loosen the lower bolt just enough to pivot the control lever fore or aft. Tighten both bolts to secure the control in the new position. 3. Repeat the adjustment for the opposite control lever. 1 Pushing the Machine by Hand Important: Always push the machine by hand.
To Operate the Machine 1 G012841 Move the bypass to the position for operating the machine (Figure 31) to engage the wheel motors. 1 Converting the 48 inch Mower to Side Discharge 2 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.
Note: Standard cutting blades will improve discharge performance and can obtained from your local authorized Toro dealer. 14. Install the mower as described in the Installing the Mower procedure in the Maintenance section for more information. (Figure 34). Remove the right baffle from the mower deck. 1 G012805 Converting the 54 inch Mower to Side Discharge The mower deck and mower blades shipped with this machine were designed for optimum mulching performance.
G010712 locknut on the side wall of the mower deck securing the left baffle to the deck. 1 2 1 3 1 4 4 2 7 G011149 3 5 Figure 36 1. Locknut (5/16 inch) 2. Carriage bolt (5/16 x 3/4 inch) 6 3. Left baffle Figure 37 4. Install fasteners here 7. Remove the left baffle from the mower deck as shown in Figure 36. 8. Locate the two bolts in loose parts and use the existing locknuts. Install these fasteners into the holes shown in Figure 36 on the mower deck to prevent flying debris.
Note: Standard cutting blades will improve discharge performance and can obtained from your local authorized Toro dealer. 1 17. Install the mower as described in the Installing the Mower procedure in the Maintenance section for more information. Using the Side Discharge The mower has a hinged grass deflector that disperses clippings to the side and down toward the turf.
Long Grass Operating Tips If the grass is ever allowed to grow slightly longer than normal, or if it contains a high degree of moisture, raise the cutting height higher than usual and cut the grass at this setting. Then cut the grass again using the lower, normal setting. Fast Throttle Setting For best mowing and maximum air circulation, operate the engine at the fast throttle position.
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 engine oil level. Clean the air intake screen. Check the mower blades. Inspect the grass deflector for damage Clean the mower housing. Every 25 hours • Grease all lubrication points.
Figure 40 Located on the seat pan underside 1. Read the Operator's Manual before performing any maintenance. 2. Check the engine oil every 8 hours 4. Check the hydraulic oil every 25 hours 3. Check the drive wheel tire pressure every 25 hours 6. Lubricate the caster wheel every 25 hours 5.
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 Cleaning the Element Service Interval: Every 100 hours—Service the paper element (more often in dusty, dirty conditions). WARNING Contact with hot surfaces may cause personal injury. Every 200 hours/Yearly (whichever comes first)—Replace the paper element (more often in dusty, dirty conditions). Keep hands, feet, face, clothing and other body parts away the muffler and other hot surfaces. 1. Lightly tap the element on a flat surface to remove dust and dirt.
WARNING Contact with hot surfaces may cause personal injury. 1 2 3 4 6 7 8 9 Keep hands, feet, face, clothing and other body parts away the muffler and other hot surfaces. Important: Do not overfill the crankcase with oil because damage to the engine may result. Do not run engine with oil below the low mark because the engine may be damaged. 5 1. Park the machine on a level surface, disengage the blade control switch, stop the engine, engage parking brake, and remove the key. 2.
Changing the Engine Oil Filter 2 1 Service Interval: Every 200 hours—Change the oil filter. (more often in dusty, dirty conditions) Note: Change the engine oil filter more frequently when operating conditions are extremely dusty or sandy. 1. Drain the oil from the engine; refer to Changing the Engine Oil. 4 3 2. Change the engine oil filter (Figure 47). 5 1 2 3 4 6 G012153 Figure 45 4.
Installing the Spark Plug check and adjust the air gap. Install a new spark plug(s) if necessary. Tighten the spark plug(s) to 16 ft-lb (22 N-m). Type: NGK BPR4ES (or equivalent) Air Gap: 0.030 inch (0.76 mm) Removing the Spark Plug 1. Disengage the PTO, move the motion control levers to the neutral locked position and set the parking brake. 2. Stop the engine, remove the key, and wait for all moving parts to stop before leaving the operating position.
Fuel System Maintenance 1 2 Replacing the Fuel Filter 3 Service Interval: Every 100 hours/Yearly (whichever comes first) (more often under dusty, dirty conditions). 1. Disengage the blade control switch (PTO), move the motion control levers to the neutral lock position, and set the parking brake. 2. Stop the engine, remove the key, and wait for all moving parts to stop before leaving the operating position. G008963 Figure 52 1. Fuel filter 2. Hose clamp 3. Allow the machine to cool down. 4.
Electrical System Maintenance WARNING Incorrect battery cable routing could damage the machine and cables causing sparks. Sparks can cause the battery gasses to explode, resulting in personal injury. Servicing the Battery • Always Disconnect the negative (black) battery cable before disconnecting the positive (red) cable. Service Interval: Monthly WARNING • Always Reconnect the positive (red) battery cable before reconnecting the negative (black) cable.
Installing the Battery 1. Position battery in the tray with the terminal posts opposite from the fuel tank (Figure 53). 2. First, install the positive (red) battery cable to positive (+) battery terminal. 3. Then install the negative battery cable to the negative (-) battery terminal. 4. Secure the cables with 2 bolts, 2 washers, and 2 locknuts (Figure 53). 5. Slide the red terminal boot onto the positive (red) battery post. Figure 54 6. Install the clamp and secure it with the wing nut (Figure 53). 1.
1 25 30 Drive System Maintenance 3 2 Checking the Tire Pressure 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 56). Check the tires when they are cold to get the most accurate pressure reading. 4 Refer to the maximum pressure suggested by the tire manufacturer on the sidewall of the caster wheel tires. G015037 Figure 55 1. 30 amp 3.
Hydraulic System Maintenance 2. Locate the filter and guards on each transaxle drive system (Figure 58). Remove three screws securing the filter guard and guard. 5 Oil Type: 20W-50 engine oil. G010254 Important: Use oil specified or equivalent. Other fluids could cause system damage. 1 Checking the Hydraulic Oil Level 2 Service Interval: Every 25 hours Check expansion reservoir and if necessary add 20W-50 engine oil to the FULL COLD line 3 1 3 4 Figure 58 Right side shown 2 1.
hydraulic filters and oil can result in irreparable damage to the transaxle drive system. 2 1 Bleeding the Hydraulic System 3 5 1. Raise the rear of machine up and support with jack stands (or equivalent support) just high enough to allow drive wheels to turn freely. 4 6 1 G010333 Figure 60 1. Jacking points 3/4 2. Enter the operator's position. Start engine and move throttle control ahead to 1/2 throttle position. Disengage parking brake. G008748 Figure 59 A.
Mower Deck Maintenance Servicing the Cutting Blades 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. Figure 61 Check the cutter blades daily for sharpness, and for any wear or damage. File down any nicks and sharpen the blades as necessary.
1 1 G014973 G014973 3 3 2 2 Figure 63 Figure 65 1. Blade, in position for measuring 1. Opposing blade edge, in position for measuring 2. Level surface 3. Measured distance between blade and surface (A) 2. Level surface 3. Second measured distance between blade and surface (B) 4. Rotate the same blade 180 degrees so that the opposing cutting edge is now in the same position. WARNING A blade that is bent or damaged could break apart and could seriously injure or kill you or bystanders.
Figure 68 1. Blade 2. Balancer Installing the Blades 1 1. Install the blade onto the spindle shaft (Figure 66). 2 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 66). Torque the blade bolt to 100-110 ft-lb (135-150 N-m). 3 4 G010341 Figure 66 1. Sail Area of Blade 2. Blade 3. Curved washer 4.
are not within 3/16 inch (5 mm), an adjustment is required; continue to the Leveling procedure. Figure 70 1. Blades front to rear 3. Measure from the tip of the blade to the flat surface here Figure 69 1. Blades side to side 3. Measure from the tip of the blade to the flat surface here 2. Outside cutting edges 2. Outside cutting edges Leveling the Mower Deck 1. Set anti-scalp rollers to top holes or remove completely for this procedure. 2. Set the height-of-cut lever to the 3 inch (76 mm) position.
3. Lower the mower to the 3 inch (76 mm) height-of-cut position. then tighten the four leveling adjust locking nuts (Figure 72). 1 1 6 2 3 4. For each of the belt covers, loosen the two bolts but do not remove them. Slide the cover until it is clear of the bolts and lift it up and out to remove it. 3 5. Remove the floor pan to access the idler pulley; refer to the Removing the Floor Pan procedure in Premaintenance. 5 6. Using a spring removal tool, (Toro part no.
11. Ensure that the belt is properly seated in all pulleys. 12. To install the belt covers, insert the tabs on the each cover into the corresponding slots on the deck bracket, ensuring that they seat. Rotate the cover to the deck and slide the notches under the loosened bolts until they are seated. Tighten the bolts to secure the cover to the deck. 1 2 5 6 7 3 4 Removing the Mower Park the machine on a level surface and disengage the blade control switch.
4. Lift the loop end of the spring and place it into the notch on the deflector bracket (Figure 77). WARNING An uncovered discharge opening could allow the lawn mower to throw objects in the operator’s or bystander’s direction and result in serious injury. Also, contact with the blade could occur. 2 Never operate the lawn mower unless you install a mulch plate, discharge deflector, or grass collection system. 1 3 Inspect the grass deflector for damage before each use.
Cleaning 1 Washing the Underside of the Mower Service Interval: Before each use or daily—Clean the mower housing. 3 4 Wash the underside of the mower after each use to prevent grass buildup for improved mulch action and clipping dispersal. 6 1. Park the machine on a level surface and disengage the blade control switch. 5 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 WARNING A broken or missing washout fitting could expose you and others to thrown objects or blade contact. Contact with blade or thrown debris can cause injury or death. Cleaning and Storage 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. 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. Paint all scratched or bare metal surfaces.
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 G014723 Wire Diagram (Rev.
Notes: 60
Notes: 61
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Intl Dist List Distributor: Atlantis Su ve Sulama Sisstemleri Lt Balama Prima Engineering Equip. B-Ray Corporation Casco Sales Company Ceres S.A. CSSC Turf Equipment (pvt) Ltd. Cyril Johnston & Co. Equiver Femco S.A. G.Y.K. Company Ltd. Geomechaniki of Athens Guandong Golden Star Hako Ground and Garden Hako Ground and Garden Hayter Limited (U.K.) Hydroturf Int. Co Dubai Hydroturf Egypt LLC Ibea S.P.A. Irriamc Irrigation Products Int'l Pvt Ltd. Jean Heybroek b.v. Maquiver S.A. Maruyama Mfg. Co. Inc.
The Toro Warranty Conditions and Products Covered The Toro Company and its affiliate, Toro Warranty Company, pursuant to an agreement between them, jointly promise to the original purchaser* to repair the Toro Products listed below if defective in materials or workmanship. Owner Responsibilities You must maintain your Toro Product by following the maintenance procedures described in the Operator's Manual. Such routine maintenance, whether performed by a dealer or by you, is at your expense.
