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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
®
6000 Series Riding Mower
with 52in, 60in, or 72in TURBO FORCE
Discharge Mower
Model No. 74906—Serial No. 316000001 and Up
Model No. 74918—Serial No. 316000001 and Up
Model No. 74926—Serial No. 316000001 and Up
Model No. 74928—Serial No. 316000001 and Up
Model No. 74930—Serial No. 316000001 and Up
Model No. 78926—Serial No. 316000001 and Up
Model No. 78928—Serial No. 316000001 and Up
Form No. 3400-714 Rev A
Professional 5000 or
®
Side
*3400-714* 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. 316000001 and Up Model No. 74918—Serial No. 316000001 and Up Model No. 74926—Serial No. 316000001 and Up Model No. 74928—Serial No. 316000001 and Up Model No. 74930—Serial No. 316000001 and Up Model No.
  • Page 2 You are responsible for operating the product properly and safely. You may contact Toro directly at www.Toro.com for product safety and operation training materials, accessory information, help finding a dealer, or to register your product. Whenever you need service, genuine Toro parts, or additional...

  • Page 3: Table Of Contents

    Contents Drive System Maintenance .........44 Checking the Seat Belt..........44 Checking the Rollover-Protection-System (ROPS) Safety ................4 Knobs...............44 Safe Operating Practices........... 4 Adjusting the Tracking ..........45 Slope Indicator ............6 Checking the Tire Pressure ........45 Safety and Instructional Decals ......... 7 Checking the Wheel Lug Nuts ........46 Product Overview ............13 Checking the Wheel Hub Slotted Nut ......46...

  • 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 performance of your Toro equipment, count on Toro • Allow engine to cool before refueling. genuine parts. When it comes to reliability, Toro delivers • Never refuel the machine indoors. replacement parts designed to the exact engineering specifications of our equipment.

  • 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. 58-6520 1. Grease 106-2655 1. Warning-do not touch or approach moving belts; remove the ignition key and read the instructions before servicing or performing maintenance.
  • Page 8 110-2068 1. Read the Operator's Manual. 112-9028 1. Warning—stay away from moving parts; keep all guards in place. 107-3069 1. Warning-there is no rollover protection when the roll bar is down. 114-4466 2. To avoid injury or death from a rollover accident, keep the roll bar in the fully raised and locked position and wear 1.
  • Page 9 116-1716 1. Fuel 6. Hour meter 2. Empty 7. PTO 3. Half 8. Parking brake 4. Full 9. Neutral 5. Battery 10. Operator-presence switch 117-0346 1. Fuel leak hazard—read the Operator's Manual; do not attempt to remove the roll bar; do not weld, drill or modify 116-4858 the roll bar in any way.
  • Page 10 126-2055 1. Wheel lug nut torque 129 N∙m (95 ft-lb) (4x) 2. Wheel hub nut torque 319 N∙m (235 ft-lb) 3. Read and understand the Operator’s Manual before performing any maintenance, check torque after first 100 117-3864 hours then every 500 hours thereafter. 1.
  • Page 11 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 7. Wear eye protection; smoking explosive gases can 127-0326 cause blindness and other injuries 1.
  • Page 12 132-0871 1. Warning—read the Operator’s Manual; do not operate the 4. Ramp hazard—when loading onto a trailer, do not use dual machine unless you are trained; wear hearing protection. ramps; only use a singular ramp wide enough for the machine and that has an incline less than 15 degrees;...

  • Page 13: 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 The indicator light appears when the fuel level is low—approximately 3.8 L (1 US gallon) remaining in the fuel tank.

  • Page 14: 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 15: 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 16: 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 17: Think Safety First

    Think Safety First Please read all safety instructions and symbols in the safety section. Knowing this information could help you or bystanders avoid injury. DANGER Operating the machine on wet grass or steep slopes can cause sliding and loss of control. •...

  • Page 18: Operating The Parking Brake

    Releasing the Parking Brake CAUTION This machine produces sound levels in excess of 85 dBA at the operator’s ear and can cause hearing loss through extended periods of exposure. Wear hearing protection when operating this machine. The use of protective equipment for eyes, ears, hands, feet, and head is recommended.

  • Page 19: Operating The Throttle

    Operating the Throttle You can move the throttle control between F and S positions (Figure 15). Always use the F position when turning on the mower deck with the blade-control switch (PTO). G008946 G008948 Figure 17 Figure 15 1. On 2.

  • Page 20: The Safety-Interlock System

    Figure 18 g027337 Figure 19 Stopping the Engine Important: Make sure that the fuel shut off valve is closed before transporting or storing the machine, as CAUTION fuel leakage may occur. Set the parking brake before Children or bystanders may be injured if they transporting.

  • Page 21: Driving Forward Or Backward

    • The blade-control switch (PTO) is disengaged. or reverse; the engine should stop. Repeat for other motion-control lever. • The motion-control levers are in the NEUTRAL LOCK position 5. Sit on the seat, disengage the parking brake, move the blade-control switch (PTO) to the O position, and The safety-interlock system also is designed to stop the move the motion-control levers to N...

  • Page 22: Stopping The Machine

    Driving Forward Driving Backward 1. Move the levers to the center, unlocked position. Note: The engine shuts off if you move the traction-control levers with the parking brake engaged. 2. To go backward, slowly pull the motion-control levers rearward (Figure 23).

  • Page 23: Adjusting The Anti-Scalp Rollers

    Adjusting the Height-of-Cut Pin position for the transport position of the mower deck (Figure 24). 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.

  • Page 24: 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 have nuts and bolts in place of the flow baffle locks and can be adjusted the same. You can adjust the mower discharge flow for different types of mowing conditions.

  • Page 25: Positioning The Seat

    • Use in wet conditions. • Lowers the engine power consumption. • Allows increased ground speed in heavy conditions. • This position is similar to the benefits of the Toro SFS mower. g019755 Figure 34 1. Seat latch 2. Seat...

  • Page 26: Changing The Seat Suspension

    Changing the Seat Suspension 3. Rotate the release valve levers vertically to push the machine. This allows hydraulic oil to bypass the pump The seat is adjustable to provide a smooth and comfortable enabling the wheels to turn (Figure 36). ride.

  • Page 27: Transporting The Machine

    Transporting the Machine Loading the Machine Use extreme caution when loading or unloading machines Use a heavy-duty trailer or truck to transport the machine. onto a trailer or a truck. Use a full-width ramp that is wider Ensure that the trailer or truck has all necessary brakes, than the machine for this procedure.
  • Page 28 g027996 Figure 39 1. Full-width ramp in stowed 4. Ramp is at least four times position (4X) as long as the height of the trailer or truck bed to the ground 2. Side view of full-width 5. H= height of the trailer or ramp in loading position truck bed to the ground 3.

  • Page 29: Operating Tips

    This also helps disperse clippings, which enhances blades as necessary. If a blade is damaged or worn, replace it decomposition and fertilization. immediately with a genuine Toro replacement blade. Mowing at Correct Intervals Normally, mow every 4 days. However, grass grows at different rates at different times.

  • Page 30: Maintenance

    • Adjust the caster pivot bearing. Every 500 hours • Check the parking 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 31: 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 32 g027339 G009029 Figure 44 Figure 42 Raise the front of the machine up and support it with jack 5. Grease the drive belt idler arm (Figure 42). stands. Figure 43 6. Remove the dust cap and adjust the caster pivots. Note: Keep the dust cap off until greasing is complete.

  • Page 33: Lubricate The Caster Wheel Hubs

    Lubricate the Caster Wheel 14. Apply a thread-locking compound to the second spacer nut and thread it onto the axle with the wrench flats Hubs facing outward. Service Interval: Yearly 15. Torque the nut to 8 to 9 N∙m (75 to 80 in-lb), loosen the nut, then torque it to 2 to 3 N∙m (20 to 25 in-lb).

  • Page 34: 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 35: 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 36: 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 37 4. Slowly pour approximately 80% of the specified oil into the filler tube and slowly add the additional oil to bring it to the mark (Figure 51). FULL G008804 g027660 Figure 51 5. Start the engine and drive to a flat area. Check the oil level again.

  • Page 38: 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 39: Checking The Spark Plugs

    Checking the Spark Plugs Important: Replace the spark plugs when they have a black coating, worn electrodes, an oily film, or cracks. 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 40: Checking The Spark Arrester

    Checking the Spark Arrester Fuel System Maintenance For a Model with a Spark Arrester Service Interval: Every 50 hours WARNING Fuel system components are under high pressure. WARNING The use of improper components can result in Hot exhaust system components may ignite system failure, gasoline leakage, and possible gasoline vapors even you shut off the engine.

  • Page 41: 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 42: Charging The Battery

    Charging the Battery 1. Disengage the blade-control switch (PTO), move the motion-control levers to the position NEUTRAL LOCK 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 43: 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. The electrical system is protected by fuses. It requires no Note: Use properly sized jumper cables with short maintenance, however, if a fuse blows check the component lengths to reduce voltage drop between systems.

  • Page 44: 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...

  • Page 45: Adjusting The Tracking

    8. Tighten the stop plate (Figure 66). g027340 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 position) position Service Interval: Every 50 hours/Monthly (whichever 2.

  • Page 46: Checking The Wheel Lug Nuts

    Checking the Wheel Lug Nuts Important: Make sure that the spring washers are installed correctly as shown in Figure Check and torque the wheel lug nuts to 129 N∙m (95 ft-lb). 5. Install the dust cap (Figure 69). Checking the Wheel Hub Slotted Nut Service Interval: After the first 100 hours Every 500 hours...
  • Page 47 Removing the Clutch Shim 1. Stop the engine, wait for all moving parts to stop, and remove the key. Engage the parking brake. Allow the machine to cool completely. 2. Using an air compressor, blow out any debris from under the brake pole and around the brake spacers. Figure 73 1.

  • Page 48: 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 and Engine-Oil Cooler the shim and refer to...

  • Page 49: 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 50: Brake Maintenance

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

  • Page 51: Belt Maintenance

    Belt Maintenance Inspecting the Belts Service Interval: Every 50 hours Replace the belt if it is worn. The signs of a worn belt include squealing while the belt is rotating; the blades slipping while cutting grass; and frayed edges, burn marks, and cracks on the belt.

  • Page 52: 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 hydraulic-pump pulley 2. Slide belt cover under the side catches 2. Clutch pulley 6. Square hole in idler arm 3.

  • Page 53: 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. 1. Disengage the blade-control switch (PTO), move the motion-control levers to the N position, EUTRAL LOCK and set the parking brake.

  • Page 54: Adjusting The Motion-Control Damper

    Adjusting the Motion-Control Note: The brake must be engaged and the motion-control levers out to start the engine. You Damper do not need to be in the seat because of the jumper wire being used. Run the engine at full throttle and You can adjust the top damper mounting bolt to obtain a release the brake.

  • Page 55: 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 the oil specified. Other fluids could 1. Flanged nut 2. Jam nut damage the hydraulic system.
  • Page 56 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, you must remove the filters. Replace both filters at the same time. Refer to the oil...

  • Page 57: Mower Deck Maintenance

    Mower Deck Maintenance Leveling the Mower Deck Setting Up the Machine Note: Ensure that the mower deck is level before matching the height of cut (HOC). 1. Position the mower on a flat surface. 2. Disengage the blade-control switch (PTO), move the motion-control levers to the N position, EUTRAL...
  • Page 58 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). To increase the height, turn the adjuster screw clockwise;...
  • Page 59 measurement should read 8.3 cm (3-1/4 inches); refer Figure 17. Fine-tune the adjuster screw by turning it to get 8.3 mm (3-1/4 inches) height (Figure 94). To increase the height, turn the adjustment nut clockwise; to decrease the height, turn the nut counterclockwise.

  • Page 60: Servicing The Cutting Blades

    (). blades as necessary. If a blade is damaged or worn, replace it immediately with a genuine Toro replacement blade. For 4. Measure from a level surface to the cutting edge, convenient sharpening and replacement, you may want to position A, of the blades ().
  • Page 61 Toro replacement blades. Replacement blades made by other manufacturers may result in nonconformance with safety standards. 1. Hold the blade end using a rag or a thickly padded glove. Figure 100 2. Remove the blade bolt, curved washer, and blade from the spindle shaft ().

  • Page 62: Removing The Mower Deck

    Installing the Blades Removing the Mower Deck 1. Install the blade onto the spindle shaft (). Before servicing or removing the mower deck, lock out the spring-loaded deck arms. Important: The curved part of the blade must point upward toward the inside of the mower to WARNING ensure proper cutting.
  • Page 63 Figure 104 1. Right stabilizer Figure 103 2. Deck strut (right side shown) 1. Clutch pulley 5. Square hole in the idler 3. Remove the shoulder bolt and nut here. arm for the ratchet 4. Remove the shoulder bolt and nut here. 2.

  • Page 64: Replacing The Grass Deflector

    Replacing the Grass Deflector Cleaning WARNING Cleaning under the Mower An uncovered discharge opening could allow the lawn mower to throw objects at you or bystanders, Service Interval: Before each use or daily resulting in serious injury. Also, contact with the 1.

  • Page 65: Storage

    Storage D. Restart the engine and run it until it stops. E. Dispose of fuel properly. Recycle as per local codes. Cleaning and Storage Important: Do not store 1. Disengage the power take-off (blade-control switch stabilizer/conditioned fuel over 90 days. (PTO), set the parking brake, and turn the ignition key to the position.

  • Page 66: Troubleshooting

    Troubleshooting Problem Possible Cause Corrective Action The malfunction indicator light (MIL) 1. The engine is too hot. 1. Turn the engine off and let it cool. comes on. 2. There is old gas in the gas tank. 2. Use new gas. 3.
  • Page 67 Problem Possible Cause Corrective Action The engine loses power. 1. The engine load is excessive. 1. Reduce the ground speed. 2. The air cleaner is dirty. 2. Clean the air-cleaner element. 3. The oil level in the crankcase is low. 3.
  • Page 68 Problem Possible Cause Corrective Action The clutch does not engage. 1. The fuse is blown. 1. Replace the fuse. Check the coil resistance, battery charge, charging system, and wiring connections, and replace components if necessary. 2. There is low voltage supply at the 2.

  • Page 69: Schematics

    Schematics G0131 19 Wire Diagram (Rev. A)
  • Page 70 Notes:...
  • Page 71 Notes:...
  • Page 72 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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