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Toro 74912 Operator's Manual

Zero-turn-radius riding mower
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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.
Original Instructions (EN)

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  • Page 1 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. Original Instructions (EN)

  • Page 2: Introduction

    Whenever you need service, genuine Toro parts, or additional information, contact an Authorized Service Dealer or Toro Customer Service and have the model and serial numbers of your product ready. Figure 1 identifies the location of the model and serial numbers on the product.

  • Page 3: Table Of Contents

    Rotary Lawnmower Machines......4 Servicing the Cutting Blades ....... 40 Safe Operating Practices ........4 Mower Deck Leveling......... 43 Toro Riding Mower Safety ........5 Inspecting the Belts ..........45 Model 74912 ............6 Replacing the Mower Belt ........45 Slope Indicator.............

  • Page 4: Safety

    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 Preparation Lawnmower Machines • While mowing, always wear substantial footwear and long trousers. Do not operate the equipment when This machine meets or exceeds European Standards in barefoot or wearing open sandals.

  • Page 5: Toro Riding Mower Safety

    • Disengage drive to attachments, stop the engine, The following list contains safety information specific to and disconnect the spark plug wire(s) or remove the Toro products or other safety information that you must ignition key know that is not included in the CEN standard.

  • Page 6: Model 74912

    • Use extreme care with grass catchers or other attachments. These can change the stability of the machine and cause loss of control. Model 74912 Sound Power This unit has a guaranteed sound power level of 105 dBA, which includes an Uncertainty Value (K) of 1 dBA Sound power level was determined according to the procedures outlined in ISO 11094.

  • Page 7: Slope Indicator

    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.

  • Page 8: Safety And Instructional Decals

    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 5. Fast 1. Power take-off (PTO), Blade control switch on 99-8936 some models 2.
  • Page 9 110-6691 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.
  • Page 10 109-8965 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.
  • Page 11 117–7490 1. Fuel 2. Full 3. Half 4. Empty...

  • Page 12: Product Overview

    Product Overview G010001 Figure 4 1. Motion control levers 4. Fuel gauge 7. Anti-scalp roller 10. Control panel 2. Operator seat 5. Footrest 8. Deflector 3. Parking brake 6. Front caster wheel 9. Foot pedal deck lift and height-of-cut G010009 Figure 5 1.

  • Page 13: Controls

    Controls Become familiar with all the controls before you start the engine and operate the machine (Figure 6). G010016 G009918 Figure 6 1. Throttle and choke control 4. Blade control switch (PTO) 2. Hour meter 5. Fuses G010077 Figure 7 3.

  • Page 14: Operation

    Contact your Authorized Service Dealer or Distributor or go to www.Toro.com for a list of all approved attachments Think Safety First and accessories. Please carefully read all of the safety instructions and decals in the safety section.

  • Page 15: Adding Fuel

    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.
  • Page 16 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. • Keep gas away from eyes and skin. Using Stabilizer/Conditioner Use a fuel stabilizer/conditioner in the machine to provide the following benefits:...

  • Page 17: Checking The Engine Oil Level

    Releasing the Parking Brake G010016 G010079 Figure 12 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). G010475 G010289 Figure 10...

  • Page 18: Operating The Ignition Switch

    Operating the Ignition Switch 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.

  • Page 19: Operating The Mower Blade Control Switch (Pto)

    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 Figure 19 brake when leaving the machine unattended, even if just for a few minutes.

  • Page 20: Driving Forward Or Backward

    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.

  • Page 21: Stopping The Machine

    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.

  • Page 22: Adjusting The Anti-Scalp Rollers

    G010016 G010236 Figure 25 1. Deck lift pedal 4. Lock position. lowest height-of-cut (use only for deck removal) 2. Cut height pin 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 Figure 24 transport position or the lowest height-of-cut position.

  • Page 23: Positioning The Seat

    Changing the Seat Ride Suspension The number of seat springs can be changed to maximize rider comfort. More springs should be used G010233 with heavier operators and on rough terrain. Fewer springs should be used with lighter operators and when mowing smooth, well established lawns.

  • Page 24: Pushing The Machine By Hand

    Pushing the Machine by Hand Important: Always push the machine by hand. Never tow the machine because damage may occur. 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.

  • Page 25: Converting To Side Discharge

    Side discharge performance can be improved by replacing the mulching blades with standard cutting blades obtained from your local Figure 32 authorized Toro dealer. To maintain optimum mulching performance, always install the mulching blades that are 1. Lock nut (5/16 inch) 3. Left baffle shipped with this unit when changing back to mulching 2.

  • Page 26: Using The Side Discharge

    (Figure 34). Remove the right baffle from Note: Standard cutting blades will improve the mower deck. discharge performance and can obtained from your local authorized Toro dealer. 16. Install the mower as described in the Installing the G012805 Mower procedure in the Maintenance section for more information.

  • Page 27: Operating Tips

    Alternate mowing direction to keep the grass standing down any nicks and sharpen the blades as necessary. If straight. This also helps disperse clippings which a blade is damaged or worn, replace it immediately with enhances decomposition and fertilization. a genuine TORO replacement blade.

  • Page 28: Maintenance

    Maintenance Recommended Maintenance Schedule(s) Maintenance Service Maintenance Procedure Interval • Change the engine oil. After the first 8 hours • Change the hydraulic system filter and oil. After the first 50 hours • Check the safety interlock system. • Check the air cleaner for dirty, loose or damaged parts. •...
  • Page 29 Figure 36 Located on the seat pan underside 1. Read the Operator’s Manual before performing any 4. Check the hydraulic oil every 25 hours maintenance. 2. Check the engine oil every 8 hours 5. Check the caster wheel tire pressure every 25 hours 3.

  • Page 30: Premaintenance Procedures

    Premaintenance Lubrication Procedures Greasing the Bearings Raising the Seat Service Interval: Every 25 hours—Grease all lubrication points. Make sure the motion control levers are locked in the Grease Type: No. 2 General Purpose Lithium Base neutral lock position. Lift the seat forward. Grease The following components can be accessed by raising 1.

  • Page 31: Engine Maintenance

    Engine Maintenance WARNING Contact with hot surfaces may cause personal injury. Keep hands, feet, face, clothing and other body parts away the muffler and other hot surfaces. Servicing the Air Cleaner Service Interval: Before each use or daily—Check the air cleaner for dirty, loose or damaged G010338 parts.

  • Page 32: Servicing The Engine Oil

    Checking the Engine Oil Level Replace the air cleaner element yearly, or every 100 hours. Service Interval: Before each use or daily 1. Open the air cleaner cover door on the blower Note: Check the oil when the engine is cold. housing to access the air cleaner element (Figure 38).
  • Page 33 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) Note: Dispose of the used oil at a recycling center.

  • Page 34: Servicing The Spark Plug

    Note: Ensure the oil filter gasket touches the engine 5. Slowly pour approximately 80% of the specified oil into the filler tube and slowly add the additional oil and then an extra 3/4 turn is completed. to bring it to the Full mark. 3.

  • Page 35: Cleaning The Blower Housing

    Fuel System Maintenance Replacing the Fuel Filter Service Interval: Every 500 hours/Yearly (whichever G008794 comes first) (more often under dusty, Figure 43 dirty conditions). 1. Disengage the blade control switch (PTO), move the motion control levers to the neutral lock position, Installing the Spark Plug and set the parking brake.

  • Page 36: Electrical System Maintenance

    Electrical System Maintenance Servicing the Battery G010340 Service Interval: Monthly 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.

  • Page 37: Servicing The Fuses

    Charging the Battery 2. To replace the fuses, pull out on the fuse to remove 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.

  • Page 38: Drive System Maintenance

    Drive System Hydraulic System Maintenance 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 Checking the Hydraulic Oil specified.
  • Page 39 result in irreparable damage to the transaxle drive system. 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).

  • Page 40: Mower Deck Maintenance

    File down any nicks and sharpen the blades as necessary. If a blade is damaged or worn, replace it immediately with a genuine Toro replacement 2. Start engine and move throttle control ahead to 1/2 blade. For convenient sharpening and replacement, you throttle position.
  • Page 41 3. Measure from the tip of the blade to the flat surface here. Figure 54 1. Cutting Edge 3. Wear/slot Forming G009680 2. Curved Area 4. Crack Figure 56 Checking for Bent Blades 1. Blade, in position for measuring Note: The machine must be on a level surface for the 2.
  • Page 42 1/8 inch (3mm), the blade spindle could be bent. Contact an Authorized Toro Dealer for service. B. If the variance is within constraints, move to the next blade..

  • Page 43: Mower Deck Leveling

    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.
  • Page 44 deck lift foot lever is pushed back against the stop, then tighten the four leveling adjust locking nuts (Figure 65). Figure 63 1. Blades front to rear 3. Measure from the tip of the blade to the flat surface here 2.

  • Page 45: Inspecting The Belts

    5. Recheck that blocks fit just snugly under the deck skirt. Make sure all attachment bolts are tight 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 Service Interval: Every 50 hours Check the belts for squealing when the belt is rotating, blades slipping when cutting grass, frayed belt edges,...

  • Page 46: Installing The Mower

    Installing the Mower 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.

  • Page 47: Cleaning

    Cleaning Washing the Underside of the Mower Service Interval: Before each use or daily—Clean the mower housing. 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.

  • Page 48: Waste Disposal

    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 1. Disengage the blade control switch (PTO), set the the washout fitting.
  • Page 49 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.

  • Page 50: Troubleshooting

    Troubleshooting Problem Possible Cause Corrective Action Starter does not crank 1. Blade control switch (PTO) is engaged. 1. Move blade control switch (PTO) to disengaged. 2. Parking brake is not on. 2. Set the parking brake. 3. Drive levers are not in neutral lock 3.
  • Page 51 Problem Possible Cause Corrective Action Machine does not drive. 1. By pass valves is not closed tight. 1. Tighten the by pass valves. 2. Pump belt is worn, loose or broken. 2. Change the belt. 3. Pump belt is off a pulley. 3.

  • Page 52: Schematics

    Schematics G012083 Wire Diagram (Rev. A)
  • Page 53 Notes:...
  • Page 54 Notes:...
  • Page 55 Notes:...
  • Page 56 Countries Other than the United States or Canada Customers who have purchased Toro products exported from the United States or Canada should contact their Toro Distributor (Dealer) to obtain guarantee policies for your country, province, or state. If for any reason you are dissatisfied with your Distributor’s service or have difficulty obtaining guarantee information, contact the Toro importer.

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Titan zx4800

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