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Toro 74538 Operator's Manual
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Toro 74538 Operator's Manual

Toro 74538 Operator's Manual

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Form No. 3368-458 Rev A
GrandStand
®
Mower
With 48in, 52in or 60in TURBO FORCE
®

Cutting Unit

Model No. 74538—Serial No. 311000001 and Up
Model No. 74539—Serial No. 311000001 and Up
Model No. 74548—Serial No. 311000001 and Up
Model No. 74549—Serial No. 311000001 and Up
Model No. 74553—Serial No. 311000001 and Up
Model No. 79548—Serial No. 311000001 and Up
Model No. 79549—Serial No. 311000001 and Up
Model No. 79553—Serial No. 311000001 and Up
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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Summary of Contents for Toro 74538

  • Page 1: Cutting Unit

    Model No. 79548—Serial No. 311000001 and Up Model No. 79549—Serial No. 311000001 and Up Model No. 79553—Serial No. 311000001 and Up 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

    The engine exhaust from this product additional information, contact an Authorized Service contains chemicals known to the State of Dealer or Toro Customer Service and have the model California to cause cancer, birth defects, and serial numbers of your product ready. Figure 1 or other reproductive harm.

  • Page 3: Table Of Contents

    Safety ................4 Servicing the Battery........... 38 Safe Operating Practices ........4 Servicing the Fuses ..........40 Toro Mower Safety ..........5 Drive System Maintenance ........40 Slope Indicator............. 7 Adjusting the Tracking ........40 Safety and Instructional Decals ......8 Checking the Tire Pressure .........

  • Page 4: Safety

    Safety – Use only an approved container – Never remove gas cap or add fuel with engine Note: The addition of attachments made by running. Allow engine to cool before refueling. other manufacturers that do not meet American Do not smoke. National Standards Institute certification will cause –...

  • Page 5: Toro Mower Safety

    The following list contains safety information specific • Keep pets and bystanders away. to Toro products and other safety information you must • Slow down and use caution when making turns and know. crossing roads and sidewalks. Stop blades if not This product is capable of amputating hands and mowing.
  • Page 6 goes over the edge of a cliff or ditch, or if an edge caves in. • Use extra care with grass catchers or other attachments. These can change the stability of the machine. • Keep all movement on slopes slow and gradual. Do not make sudden changes in speed or direction.

  • Page 7: Slope Indicator

    Slope Indicator G011841 Figure 2 This page may be copied for personal use. 1. The maximum slope you can safely operate the machine on is 20 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 20 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. 106-5517 1. Warning–Do Not touch the hot surface. 93-7010 1.
  • Page 9 116-3290 115-4186 1. Interval 2. Power Take-off (PTO) 3. Parking brake 4. Neutral 5. Operator presence switch 6. Battery 117-0456 1. Height of cut (HOC)—high 3. Height of cut (HOC)—low 2. Height of cut (HOC)—medium 115-4212 1. Hydraulic oil level 3.
  • Page 10 119-7382 120-6412 1. Belt tension adjustment; read the Operator’s Manual for more information. 120-6424 1. Cutting/dismemberment hazard, hand—disengage the power take-off(PTO), stop the engine and watch for all moving parts to stop. 117–3626 1. Warning—read the Operator’s Manual. 5. Thrown object hazard—keep bystanders a safe distance from the machine.
  • Page 11 119-8727 1. Traction control 3. Slow 5. Reverse 7. Operator presence switch 2. Fast 4. Neutral 6. Power Take-off (PTO)—disengage 119-8728 1. Parking brake—disengage 3. Power Take-off 5. Engine speed 7. Continuous variable setting (PTO)—engage 2. Parking brake—engage 4. Power Take-off 6.

  • Page 12: Product Overview

    Product Overview g015395 Figure 4 60 inch machine G015229 Figure 3 1. Side discharge chute 7. Control levers 48 inch and 52 inch machines 2. Battery 8. Manual tube 3. Engine 9. Platform (down position) 1. Side discharge chute 7. Control levers 4.

  • Page 13: Controls

    Controls 1 2 3 4 Become familiar with all the controls (Figure 5) before you start the engine and operate the machine. g015396 Figure 6 60 inch machine 1. Parking brake lever 8. Fuel cap g015230 2. Choke 9. Platform latch Figure 5 3.

  • Page 14: Specifications

    Specifications Note: Specifications and design are subject to change without notice. 48 inch mowers: Figure 7 Width with deflector down 63.5 inches (161.3 cm) 1. Safety interlock symbols 3. Hour meter...

  • Page 15: Operation

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

  • Page 16: Checking The Engine Oil Level

    Breaking In a New Machine Note: A fuel stabilizer/conditioner is most effective when mixed with fresh gasoline. To New engines take time to develop full power. Mower minimize the chance of varnish deposits in the fuel decks and drive systems have higher friction when new, system, use fuel stabilizer at all times.

  • Page 17: Operating The Mower Blade Control Switch (Pto)

    G009174 Figure 11 Figure 9 1. Parking brake engaged 2. Parking brake released Operating the Throttle Releasing the Parking Brake The throttle control can be moved between Fast and Slow positions (Figure 12). Pull the brake lever back and over into the slot and push the parking brake lever forward.

  • Page 18: Operating The Ignition Switch

    Ensure the fuel shut-off valve is open when starting the engine. g015365 G008959 Figure 13 1. On 2. Off G008948 Operating the Ignition Switch Figure 15 1. On 2. Off 1. Turn the ignition key to the Start position (Figure 14). When the engines starts, release the key. Important: Do not engage starter for more Starting and Stopping the than 5 seconds at a time.

  • Page 19: Stopping The Engine

    Stopping the Engine 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. Let the engine idle at slow throttle (turtle) for 60 seconds before turning the ignition switch off.

  • Page 20: The Safety Interlock System

    The Safety Interlock System 2. Set the parking brake. 3. Move the right side motion control lever to the CAUTION center, un-locked position. The blades should not rotate. If safety interlock switches are disconnected or damaged the machine could operate unexpectedly 4.

  • Page 21: Operating The Platform

    Operating the Platform The machine can be used with the platform in the up or down position. It is the operator’s preference on which position to use. Operating the Machine with the Platform Up Operating the machine with the platform up is recommended when: •...

  • Page 22: Stopping The Machine

    G015234 Figure 21 Figure 22 1. Front reference bar 4. Right control lever 2. Left control lever 5. Right control lever in the neutral lock position 3. Rear reference bar Driving Backward 3. To go forward, move the speed control lever to the 1.

  • Page 23: Using The Rotation Indicator

    To Push the Machine Set the parking brake when you leave the machine; refer to Setting the Parking Brake in Operation. Remember 1. Disengage the PTO, move the motion control to remove the key from the ignition switch. levers to the neutral locked position and set the parking brake.

  • Page 24: Loading Machines

    Important: Do Not attempt to turn the unit while 2. If using a trailer, connect it to the towing vehicle and connect the safety chains. on the ramp; you may lose control and drive off the side. 3. If applicable, connect the trailer brakes. Avoid sudden acceleration when driving up a ramp and 4.

  • Page 25: Side Discharging Or Mulching The Grass

    Side Discharging or Mulching Adjusting the Anti-Scalp the Grass Rollers (60 inch Mower Decks Only) This mower has a hinged grass deflector that disperses clippings to the side and down toward the turf. Whenever you change the height-of-cut, it is recommended to adjust the height of the anti-scalp DANGER rollers.

  • Page 26: Positioning The Flow Baffle

    • Use in tall, dense grass mowing conditions. mower. • 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.

  • Page 27: Using The Mid-Size Weight

    Figure 33 Using the Mid-Size Weight • Weights are installed to improve handling, balance and improve performance. Weights can be added or removed to create optimized performance under different mowing conditions and for operator preference. • It is recommended that weights be added or removed one at a time until the desired handing and balance is achieved.

  • Page 28: Maintenance

    • Change the hydraulic filter and hydraulic oil when using Mobil® 1 oil. Every 250 hours • Adjust the caster pivot bearing. • Change the hydraulic filter and hydraulic oil when using Toro® HYPR-OIL™ 500 Every 500 hours hydraulic oil.

  • Page 29: Premaintenance Procedures

    Premaintenance Procedures Raising the Mower for Access The front of the mower can be raised and supported on its back for access under the machine for maintenance. 1. Raise the platform. Refer to Operating the Platform in Operation. 2. Remove the battery. g015408 Figure 35 1.

  • Page 30: Release The Cushion For Rear Access

    Figure 36 1. Remove battery 2. With two people, lift the front end of the mower Figure 37 (ensure the platform is up) 1. Plastic bushing with large 3. Hairpin cotter pin washer 2. Cushion bracket with key Release the Cushion for Rear hole Access The cushion can be released for rear access to the...

  • Page 31: Lubrication

    Lubrication Grease with No. 2 general purpose lithium base or molybdenum base grease. How to Grease 1. Disengage the PTO 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.

  • Page 32: Lubricate Caster Wheel Hubs

    Lubricate Caster Wheel Hubs 13. Torque the nut to 75-80 in-lb (8-9 N-m), loosen, then re-torque to 20-25 in-lb (2-3 N-m). Make sure Service Interval: Yearly axle does not extend beyond either nut. 1. Stop the engine, wait for all moving parts to stop, 14.

  • Page 33: Engine Maintenance

    Engine Maintenance Cleaning the Foam Air Cleaner Element Service Interval: Every 25 hours Servicing the Air Cleaner 1. Wash the foam element in liquid soap and warm water. When the element is clean, rinse it thoroughly. Service Interval/Specification 2. Dry the element by squeezing it in a clean cloth. Important: Replace the foam element if it is Inspect the foam and paper elements and replace them torn or worn.

  • Page 34: Changing The Engine Oil

    Important: Remember to add 80% of the oil and then gradually fill it to the full mark on the dipstick. Oil Type: Detergent oil (API service SF, SG, SH, SJ or SL) Crankcase Capacity for 20hp and 25hp Engines: g015238 58 ounces (1.7 liter) with the filter removed;...

  • Page 35: Changing The Engine Oil Filter

    3. Disengage the PTO, move the motion control levers to the neutral locked position and set the parking brake. 4. Stop the engine, remove the key, and wait for all moving parts to stop before leaving the operating position (Figure 45). g015238 G008796 Figure 46...

  • Page 36: Servicing The Spark Plug

    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 g015238 moving parts to stop before leaving the operating position.

  • Page 37: Fuel System Maintenance

    Installing the Spark Plug Fuel System Tighten the spark plug(s) to 16 ft.-lb (22 N-m). Maintenance Draining the Fuel Tank Note: There is no other recommended way to drain fuel from the tank, other than using a syphon pump. A syphon pump can be purchased at a hardware store.

  • Page 38: Servicing The Fuel Filter

    Servicing the Fuel Filter Electrical System Maintenance Replacing the Fuel Filter Service Interval: Every 800 hours/Yearly (whichever Servicing the Battery comes first) Service Interval: Every 100 hours Never install a dirty filter if it is removed from the fuel line. Always keep the battery clean and fully charged.

  • Page 39: Charging The Battery

    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. • Always Disconnect the negative (black) battery cable before disconnecting the positive (red) cable. • Always Reconnect the positive (red) battery cable before reconnecting the negative (black) cable.

  • Page 40: Servicing The Fuses

    Drive System Maintenance Adjusting the Tracking Note: Determine the left and right sides of the machine from the normal operating position. 1. Push both control levers forward the same distance. Figure 54 2. Check if the machine pulls to one side. If it does, 1.

  • Page 41: Checking The Tire Pressure

    4. If adjustment is needed, loosen the jam nut and adjust the bolt to the correct distance. Tighten the jam nut after adjusting the bolt (Figure 58). 5. Test the safety interlock system before operation. Refer to The Safety Interlock System (page 20). g015369 2 3 4 Figure 57...

  • Page 42: Adjusting The Caster Pivot Bearing

    Figure 59 Adjusting the Caster Pivot Bearing Figure 60 1. Spring Washers 3. Dust Cap Service Interval: Every 500 hours/Yearly (whichever 2. Lock Nut comes first) 1. Disengage the blade control switch (PTO), move the motion control levers to the neutral locked position Servicing the Caster Wheel and set the parking brake.

  • Page 43: Adjusting The Electric Clutch

    2. Remove one bushing, then pull the spanner bushing and roller bearing out of the wheel hub (Figure 61). 3. Remove the other bushing from the wheel hub and clean any grease and dirt from the wheel hub (Figure 61). 4.

  • Page 44: Cooling System Maintenance

    Brake Maintenance Cooling System Maintenance Servicing the Brake Cleaning the Air Intake Screen Before each use, check brakes on both a level surface and slope. Service Interval: Before each use or daily Always set the parking brake when you stop the machine Before each use remove any build-up of grass, dirt or leave it unattended.

  • Page 45: Adjusting The Brakes

    6. Loosen the jam nut (Figure 65). 7. Rotate the yoke. To tighten the brake, rotate the yoke up. To loosen the brake, rotate the yoke down (Figure 65). 8. Secure the yoke to lower brake lever with the hair pin cotter pin and clevis pin (Figure 65).

  • Page 46: Belt Maintenance

    Belt Maintenance Replacing the Mower Deck Belt Service Interval: Every 100 hours—Check the mower deck belt. Squealing when the belt is rotating, blades slipping when cutting grass, frayed belt edges, burn marks and cracks are signs of a worn deck belt. Replace the deck belt if any of these conditions are evident.

  • Page 47: Replacing The Pump Drive Belt

    G015595 Figure 67 1. 6-1/2 inches (165 mm) 4. Ratchet from hook to hook 2. Spring 5. Square hole for ratchet 3. Spring loaded idler 6. Nut G015402 Figure 68 Replacing the Pump Drive Belt 1. Hydraulic pumps 4. Clutch retainer 2.

  • Page 48: Controls System Maintenance

    Controls System Maintenance Adjusting the Motion Control Handle Positions Adjusting the Right Side Motion Control Lever If the motion control levers do not align horizontally, adjust the right side motion control lever. g015372 Note: Adjust the horizontal alignment before the front Figure 70 to back alignment.
  • Page 49 g015241 Figure 72 1. Left motion control lever 3. Neutral locked position 2. Right motion control lever 4. Align the control levers front to back 2. Rotate the right cable adjustment to place the right motion control lever in the center of the neutral lock slot in the control panel.

  • Page 50: Hydraulic System Maintenance

    Servicing the Hydraulic the hot level and the cold level. System Note: The fluid level should be below the hot level Hydraulic Oil Type: Toro ® HYPR-OIL ™ of the baffle, when the fluid is warm (Figure 74).
  • Page 51 Replacing the Hydraulic Filter 1. Disengage the PTO and set the parking brake. 2. Stop the engine and wait for all moving parts to stop Service Interval: After the first 8 hours before leaving the operating position. WARNING 3. Remove hydraulic reservoir cap. Hot hydraulic fluid can cause severe burns.

  • Page 52: Bleeding The Hydraulic System

    Check hydraulic hoses and hoses for leaks, loose fittings, kinked hoses, loose mounting supports, wear, weather and chemical deterioration. Make necessary repairs before operating. Note: Keep areas around hydraulic system clean from grass and debris build up. Note: Extended operating time at high temperatures in a hot climate may lead to deterioration of hoses and seals.

  • Page 53: Mower Deck Maintenance

    Mower Deck Checking for Bent Blades 1. Disengage the PTO, move the motion control levers Maintenance to the neutral locked position and set the parking brake. Servicing the Cutting Blades 2. Stop the engine, remove the key, and wait for all moving parts to stop before leaving the operating To ensure a superior quality of cut, keep the blades position.

  • Page 54: Correcting The Mower Quality Of Cut

    Toro replacement blades. Replacement blades made by other manufacturers may result in non-conformance with safety standards. Figure 82 1. Hold the blade end using a rag or thickly-padded glove. 1. Blade 2.
  • Page 55 position. Disconnect the spark plug wire(s) from 2. Locate the U-plates on the side of the engine deck the spark plug(s). (Figure 85). 3. Adjust the tire pressure in the rear tires to 12-14 psi 3. Loosen the U-plate on one side and adjust it up or (83-97 kPa).
  • Page 56 mower deck is built a 1/4 inch (6mm) lower than the front lip of the mower deck. 5. For 60 inch mower decks, tighten the lift links (Figure 89). 6. Tighten both the front and rear nuts. 7. Check the front-to-rear pitch of the cutting unit. 8.

  • Page 57: Replacing The Grass Deflector

    Figure 90 1. Measure from a level 2. Measure blade at point A surface 4. The measurement should be 3 inch (7.6 cm). 5. If it does not measure correctly, locate the height-of-cut rod on the right side of the machine (Figure 91).

  • Page 58: Cleaning

    Cleaning 1. Remove the locknut, bolt, spring and spacer holding the deflector to the pivot brackets (Figure 92). Remove damaged or worn grass deflector. Cleaning Under the Mower Service Interval: Before each use or daily Remove the grass buildup under the mower daily. 1.

  • Page 59: Storage

    Storage hole. Now use the starter to crank the engine and distribute the oil inside the cylinder. Install the spark plug(s). Do not install the wire on the spark plug(s). Cleaning and Storage 10. Check and tighten all bolts, nuts, and screws. Repair 1.

  • Page 60: Troubleshooting

    Troubleshooting Problem Possible Cause Corrective Action Engine will not start, starts hard, or fails 1. Fuel tank is empty or shut-off valve 1. Fill fuel tank with gasoline and open to keep running. closed. valve 2. Move the choke lever to choke position. 2.
  • Page 61 Problem Possible Cause Corrective Action Blades do not rotate. 1. Pump drive belt is worn, loose or 1. Check the belt tension. broken. 2. Install drive belt and check adjusting 2. Pump drive belt is off pulley. shafts and belt guides for correct position.

  • Page 62: Schematics

    Schematics Hydraulic Schematic (Rev. A)
  • Page 63 G015606 Electrical Schematic (Rev. A)
  • Page 64 Countries Other than the United States or Canada 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.

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