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Toro 74906 Operator's Manual
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Toro 74906 Operator's Manual

With 52in, 60in, or 72in turbo force side discharge mower
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Original Instructions (EN)
Z Master
®
Mower
with 52in, 60in, or 72in TURBO FORCE
Discharge Mower
Model No. 74906—Serial No. 314000001 and Up
Model No. 74918—Serial No. 314000001 and Up
Model No. 74926—Serial No. 314000001 and Up
Model No. 74928—Serial No. 314000001 and Up
Model No. 74930—Serial No. 314000001 and Up
Model No. 78926—Serial No. 314000001 and Up
Model No. 78928—Serial No. 314000001 and Up
Form No. 3380-801 Rev A
Professional Riding
®
Side
*3380-801* A

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Summary of Contents for Toro 74906

  • Page 1 52in, 60in, or 72in TURBO FORCE ® Side Discharge Mower Model No. 74906—Serial No. 314000001 and Up Model No. 74918—Serial No. 314000001 and Up Model No. 74926—Serial No. 314000001 and Up Model No. 74928—Serial No. 314000001 and Up Model No. 74930—Serial No. 314000001 and Up Model No.

  • Page 2: Introduction

    Whenever you need service, genuine Toro parts, or additional WARNING 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 CALIFORNIA model and serial numbers on the product. Write the numbers Proposition 65 Warning in the space provided.

  • Page 3: Table Of Contents

    Contents Jump-starting the Machine........42 Drive System Maintenance .........43 Checking the Seat Belt..........43 Introduction ..............2 Checking the Knobs on the Rollover Protection Safety ................4 System (ROPS) ..........43 Safe Operating Practices........... 4 Adjusting the Tracking ..........44 Slope Indicator ............6 Checking the Tire Pressure ........44 Safety and Instructional Decals .........

  • Page 4: Safety

    Operation Safety • Lightning can cause severe injury or death. If lightning is seen or thunder is heard in the area, do not operate Improperly using or maintaining the machine can result the machine; seek shelter. in injury. To reduce the potential for injury, comply with these safety instructions and always pay attention to the •...

  • Page 5: Maintenance And Storage

    To best protect your investment and maintain optimal running. performance of your Toro equipment, count on Toro genuine parts. When it comes to reliability, Toro delivers • Allow engine to cool before refueling. replacement parts designed to the exact engineering •...

  • Page 6: 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 7: 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. 68-8340 1-403005 98-5954 103-2076 54-9220 58-6520 1. Grease 105-7798 66-1340...
  • Page 8 110-2067 110-2068 1. Read the Operator's Manual. 107-2102 114-4466 1. Main, 25A 3. Charge, 25A 2. PTO, 10A 4. Auxiliary, 15A 109-7232...
  • Page 9 116-0205 115-7445 1. Grease pulleys and spindles 2. Maintenance interval—50 hours 116-0752 1. Latch 2. Unlatch 116-0090 116-1654 116-0157...
  • Page 10 116-1716 116-5944 1. Fuel 6. Hour meter 2. Empty 7. PTO 3. Half 8. Parking brake 4. Full 9. Neutral 5. Battery 10. Operator presence switch 116-2643 Battery Symbols Some or all of these symbols are on your battery 1. Explosion hazard 6.
  • Page 11 125–9382 120–5899 1. PTO (Power Take-off) 3. Continuous variable setting 4. Fast 2. Slow 109-7069...

  • Page 12: Product Overview

    Fuel Gauge Product Overview The fuel gauge is located with the hour meter, and the bars light up when the ignition switch is on (Figure 6). The indicator light appears when the fuel level is low—approximately 3.8 L (1 US gallon) remaining in the fuel tank.

  • Page 13: Specifications

    A selection of Toro approved attachments and accessories is 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. Specifications Note: Specifications and design are subject to change without notice.

  • Page 14: Operation

    Operation DANGER In certain conditions during fueling, static Note: Determine the left and right sides of the machine electricity can cause a spark which can ignite the from the normal operating position. gasoline vapors. A fire or explosion from gasoline can burn you and others and can damage property.

  • Page 15: Checking The Engine Oil Level

    Filling the Fuel Tank Breaking In a New Machine 1. Park the machine on level ground. New engines take time to develop full power. Mower decks and drive systems have higher friction when new, placing 2. Shut the engine off and set the parking brake. additional load on the engine.

  • Page 16: Think Safety First

    DANGER Operating on wet grass or steep slopes can cause sliding and loss of control. Wheels dropping over edges can cause rollovers, which may result in serious injury, death, or drowning. There is no rollover protection when the roll bar is down.

  • Page 17: Operating The Parking Brake

    Operating the Mower Blade The use of protective equipment for eyes, ears, feet, and head is recommended. Control Switch (PTO) The blade control switch (PTO) starts and stops the mower blades and any powered attachments. Engaging the Blade Control Switch G009027 (PTO) Figure 10...

  • Page 18: Operating The Ignition Switch

    Operating the Ignition Switch Starting and Stopping the Engine 1. Turn the ignition key to the Start position (Figure 16). When the engine starts, release the key. Starting the Engine Important: Do not engage the starter for more than 5 seconds at a time. If the engine fails to 1.

  • Page 19: The Safety Interlock System

    G008947 Figure 19 1. Off 3. Start 2. Run Stopping the Engine CAUTION Children or bystanders may be injured if they move or attempt to operate the machine 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.

  • Page 20: Driving Forward Or Backward

    • The blade control switch (PTO) is disengaged. 5. Sitting on the seat, disengage the parking brake, move the blade control switch (PTO) to off and move the • The motion control levers are in the neutral locked motion control levers to neutral lock position. Try position starting the engine;...

  • Page 21: Stopping The Machine

    Driving Forward Note: The engine will kill if the traction control levers are moved with the parking brake engaged. To stop, pull the motion control levers to the neutral position. 1. Release the parking brake; refer to Releasing the Parking Brake in Operation. 2.

  • Page 22: Adjusting The Anti-Scalp Rollers

    Adjusting the Height-of-Cut Pin The height of cut is adjusted from 25 to 140 mm (1 to 5-1/2 inches) in 6 mm (1/4 inch) increments by moving the clevis pin into different hole locations. 1. Move the transport lock to the lock position. 2.

  • Page 23: Adjusting The Flow Baffle Cam Locks

    Adjusting the Flow Baffle Cam Locks This procedure is applicable only to machines with the flow baffle locks. Certain models will have nuts and bolts in-place of the flow baffle locks and can be adjusted the same. The mower discharge flow can be adjusted for different types of mowing conditions.

  • Page 24: Positioning The Seat

    • Use in wet conditions. • Lowers the engine power consumption. g019755 Figure 35 • Allows increased ground speed in heavy conditions. • This position is similar to the benefits of the Toro SFS 1. Seat latch 2. Seat mower.

  • Page 25: Changing The Seat Suspension

    Changing the Seat Suspension 2. Rotate the release valve levers vertically to push the machine. This allows hydraulic oil to by-pass the pump The seat is adjustable to provide a smooth and comfortable enabling the wheels to turn (Figure 37). ride.

  • Page 26: Transporting The Machine

    Transporting the Machine Loading the Machine Use a heavy-duty trailer or truck to transport the machine. Use extreme caution when loading the machine onto a trailer Ensure that the trailer or truck has all necessary brakes, or truck. One full-width ramp that is wide enough to extend lighting, and marking as required by law.
  • Page 27 Figure 39 1. Trailer 3. Not greater than 15 degrees 2. Full-width ramp 4. Full-width ramp—side view...

  • Page 28: Operating Tips

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

  • Page 29: Maintenance

    • Adjust the caster pivot bearing. Every 500 hours • Check the park brake adjustment. • Change the hydraulic filters and hydraulic oil when using Toro® HYPR-OIL™ 500 hydraulic oil (more often in dirty or dusty conditions). • Replace the inner air filter.

  • Page 30: Lubrication

    CAUTION If you leave the key in the ignition switch, someone could accidently start the engine and seriously injure you or other bystanders. Remove the key from the ignition before you do any maintenance. Lubrication Lubricating the Machine Grease more frequently when operating conditions are extremely dusty or sandy.
  • Page 31 G009029 Figure 44 Figure 42 5. Grease the drive belt idler arm (Figure 42). Figure 43 6. Remove the dust cap and adjust the caster pivots. Note: Keep the dust cap off until greasing is complete. Refer to Adjusting the Caster Pivot Bearing in Maintenance.

  • Page 32: Lubricate The Caster Wheel Hubs

    Lubricate the Caster Wheel 13. Apply a thread locking adhesive to the second spacer nut and thread it onto the axle with the wrench flats Hubs facing outward. 14. Torque the nut to 8-9 N-m (75-80 in-lb), loosen, then Service Interval: Yearly re-torque to 2-3 N-m (20-25 in-lb).

  • Page 33: Engine Maintenance

    Engine Maintenance 8. Gently slide the primary filter out of the air-cleaner body (Figure 47). Note: Avoid knocking the filter into the side of the WARNING body. Contact with hot surfaces may cause personal 9. Remove the inner filter only if you intend to replace it. injury.

  • Page 34: Servicing The Engine Oil

    Servicing the Engine Oil 2. If the inner filter is being replaced, carefully slide it into the filter body (Figure 47). Oil Type: Detergent oil (API service class SL, SM, SN, or 3. Carefully slide the primary filter over the inner filter higher) (Figure 47).

  • Page 35: Changing The Engine Oil

    Changing the Engine Oil Service Interval: Every 100 hours (more often in dirty or dusty conditions). Note: Dispose of the used oil at a recycling center. 1. Park the machine so that the rear is slightly lower than G008804 the front to ensure that the oil drains completely. 2.

  • Page 36: Changing The Engine Oil Filter

    4. 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 (Figure 51). G008804 G008796 Figure 51 5. Start the engine and drive to a flat area. Check the oil level again.

  • Page 37: Servicing The Spark Plugs

    Servicing the Spark Plugs Service Interval: Every 200 hours—Check and gap the spark plug. Make sure that the air gap between the center and side electrodes is correct before installing the spark plugs. Use a G008804 spark-plug wrench for removing and installing the spark plugs and a gapping tool/feeler gauge to check and adjust the air gap.

  • Page 38: Checking The Spark Plugs

    Checking the Spark Plugs Important: Replace the spark plugs when they have: a black coating, worn electrodes, an oily film, cracks or reuse is questionable. If you see light brown or gray on the insulator, the engine is operating properly. A black coating on the insulator usually means that the air cleaner is dirty.

  • Page 39: Check Spark Arrester (If Equipped)

    Check Spark Arrester (if Fuel System equipped) Maintenance Service Interval: Every 50 hours WARNING WARNING Fuel system components are under high pressure. Hot exhaust system components may ignite The use of improper components can result in gasoline vapors even after the engine is stopped. system failure, gasoline leakage, and possible Hot particles exhausted during engine operation explosion.

  • Page 40: Servicing The High-Pressure Fuel Filter

    Electrical System Maintenance Servicing the Battery Service Interval: Monthly WARNING CALIFORNIA Proposition 65 Warning Battery posts, terminals, and related accessories contain lead and lead compounds, G008963 chemicals known to the State of California Figure 58 to cause cancer and reproductive harm. Wash hands after handling.

  • Page 41: Charging The Battery

    Charging the Battery 1. Disengage the blade control switch (PTO), move the motion control levers to the neutral locked position and set the parking brake. WARNING 2. Stop the engine, remove the key, and wait for all moving Charging the battery produces gases that can parts to stop before leaving the operating position.

  • Page 42: Servicing The Fuses

    Servicing the Fuses 2. Make sure that the booster battery is a good and fully charged lead-acid battery at 12.6 volts or greater. Use The electrical system is protected by fuses. It requires properly sized jumper cables with short lengths to no maintenance;...

  • Page 43: Drive System Maintenance

    Drive System 4. Connect the other end of the positive cable to the positive terminal of the booster battery. Maintenance 5. Connect the black negative (–) cable to the other terminal (negative) of the booster battery. 6. Make the final connection on the engine block of Checking the Seat Belt the stalled vehicle (not to the negative battery post) away from the battery and stand back (Figure 64).

  • Page 44: Adjusting The Tracking

    g019756 Figure 66 Left control lever shown 1. Control lever 3. Stop plate 2. Bolt Figure 65 Checking the Tire Pressure 1. ROPS knob (locked 3. Roll bar in the upright Service Interval: Every 50 hours/Monthly (whichever position) position comes first) 2.

  • Page 45: Checking The Wheel Lug Nuts

    Checking the Wheel Lug Nuts 4. Tighten the locknut until the spring washers are flat and then back off a 1/4 turn to properly set the pre-load on Check and torque the wheel lug nuts to 122 to 129 N-m (90 the bearings (Figure 69).
  • Page 46 Removing the Clutch Shim 1. Stop the engine, wait for all moving parts to stop, and remove the key. 2. Engage the parking brake and allow the machine to cool. 3. Using an air compressor, blow out any debris from under the brake pole and around the brake spacers.

  • Page 47: Cooling System Maintenance

    Cooling System F. Perform the following safety check: i. Sit on the seat and start the engine. Maintenance ii. Make sure that the blades do not engage with the PTO switched off and the clutch disengaged. Cleaning the Engine Screen If the clutch does not disengage, install the and Engine Oil Cooler shim and reference the Troubleshooting...

  • Page 48: Check And Clean The Hydraulic Unit Shrouds

    Figure 77 Figure 78 1. Engine guard 4. Fan housing 1. Hydraulic unit shrouds 2. Engine air intake screen 5. Screw 3. Bolt Check and Clean the Hydraulic Unit Shrouds Service Interval: Before each use or daily 1. Disengage the PTO and set the parking brake. 2.

  • Page 49: Brake Maintenance

    Brake Maintenance Adjusting the Parking Brake Service Interval: After the first 100 hours Every 500 hours thereafter Check to make sure that the brake is adjusted properly. This procedure must be followed after the first 100 hours or when a brake component has been removed or replaced. 1.

  • Page 50: Belt Maintenance

    Belt Maintenance 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, burn marks, and cracks. These are signs of a worn mower belt; replace the mower belt if any of these conditions are evident.

  • Page 51: Replacing The Hydraulic Pump Drive Belt

    Figure 82 1. Position the belt cover 3. Ensure that the tab is Figure 83 under the metal catch 1. Idler pulley 5. Left-hand hydraulic pump 2. Slide belt cover under the pulley side catches 2. Clutch pulley 6. Square hole in idler arm 3.

  • Page 52: Controls System Maintenance

    Controls System Maintenance Adjusting the Control Handle Position There are 2 height positions for the control levers: high and low. Remove the bolts to adjust the height for the operator. 1. Disengage the PTO, move the motion control levers to the neutral locked position, and set the parking brake.

  • Page 53: Adjusting The Motion Control Damper

    Adjusting the Motion Control the jumper wire being used. Run the engine at full throttle and release the brake. Damper 6. Run the machine at least 5 minutes with the drive levers at full forward speed to bring hydraulic oil up The top damper mounting bolt can be adjusted to obtain a to operating temperature.

  • Page 54: Hydraulic System Maintenance

    Hydraulic System Maintenance Servicing the Hydraulic System Hydraulic Oil Type: Toro ® HYPR-OIL ™ 500 hydraulic oil or Mobil ® 1 15W-50. Figure 88 Important: Use oil specified. Other fluids could cause 1. Flanged nut 2. Jam nut system damage.
  • Page 55 Every 500 hours—Change the hydraulic filters and ® ™ hydraulic oil when using Toro HYPR-OIL hydraulic oil (more often in dirty or dusty conditions). To replace the hydraulic oil, the filters need to be removed. Replace both at the same time. Refer to the oil specifications under Servicing the Hydraulic System for the correct oil.

  • Page 56: Mower Deck Maintenance

    Mower Deck Maintenance Leveling the Mower Deck Setting Up the Machine Note: Ensure that the mower deck is leveled before matching the height of cut (HOC). 1. Position the machine on a flat surface. 2. Disengage the blade control switch (PTO), move the motion control levers to the neutral locked position and set the parking brake.
  • Page 57 10. If needed, loosen the flanged locknut on the side of the yoke and the jam nut on top. Fine-tune the adjuster screw by turning it to get 7.6 mm (3 inch) height (Figure 94). Note: To increase the height, turn the adjuster screw clockwise;...
  • Page 58 15. On both sides of the deck, measure from the level surface to the back tip of the blade (Postion B). The measurement should read 8.3 cm (3-1/4 inches); refer to Figure 93. 16. Fine-tune the adjuster screw by turning it to get 8.3 mm (3-1/4 inches) height (Figure 94).

  • Page 59: Servicing The Cutting Blades

    If a blade is damaged or worn, replace the cutting edge, position A, of the blades (Figure 98). it immediately with a genuine Toro replacement blade. For Note this dimension. convenient sharpening and replacement, you may want to keep extra blades on hand.
  • Page 60 by other manufacturers may result in non-conformance with blade is not balanced, file some metal off the end of safety standards. the sail area only (Figure 102). Repeat this procedure until the blade is balanced. 1. Hold the blade end using a rag or thickly-padded glove. 2.

  • Page 61: Removing The Mower Deck

    Removing the Mower Deck Before servicing or removing the mower deck, the spring-loaded deck arms must be locked out. WARNING Deck lift arm assemblies have stored energy. Removing the deck with out releasing the stored energy can cause serious injury or death. Do not attempt to disassemble the deck from the front frame without locking out the stored energy.

  • Page 62: Replacing The Grass Deflector

    Replacing the Grass Deflector WARNING Operating the machine with the engine running at a speed greater than the factory setting can cause the machine to throw a part of the blade or engine toward the operator or a bystander and result in serious personal injury or death.

  • Page 63: Cleaning

    Cleaning Storage Cleaning and Storage Cleaning Under the Mower 1. Disengage the power take off (blade control switch Service Interval: Before each use or daily (PTO), set the parking brake, and turn the ignition key 1. Disengage the blade control switch (PTO), move the to Off.
  • Page 64 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.

  • Page 65: Troubleshooting

    Troubleshooting Problem Possible Cause Corrective Action The starter does not crank. 1. The blade-control switch (PTO) is 1. Move the blade-control switch (PTO) to engaged. the disengaged position. 2. The parking brake is not on. 2. Set the parking brake. 3.
  • Page 66 Problem Possible Cause Corrective Action The machine does not drive. 1. The bypass valves are not closed tight. 1. Tighten the bypass valves. 2. The pump belt is worn, loose, or 2. Change the belt. broken. 3. The pump belt is off a pulley. 3.

  • Page 67: Schematics

    Schematics G0131 19 Wire Diagram (Rev. A)
  • Page 68 Customers who have purchased Toro products outside 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. If all other remedies fail, you may contact us at Toro Warranty Company.

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