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Toro GrandStand 74550 Operator's Manual
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Toro GrandStand 74550 Operator's Manual

Toro GrandStand 74550 Operator's Manual

Mower with a 48in, 52in or 60in turbo force cutting unit
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Form No. 3365-450 Rev A
GrandStand
®
Mower
With a 48in, 52in or 60in TURBO FORCE
®
Cutting Unit
Model No. 74538—Serial No. 310000001 and Up
Model No. 74539—Serial No. 310000001 and Up
Model No. 74548—Serial No. 310000001 and Up
Model No. 74549—Serial No. 310000001 and Up
Model No. 74550—Serial No. 310000001 and Up
Model No. 74551—Serial No. 310000001 and Up
Model No. 79548—Serial No. 310000001 and Up
Model No. 79549—Serial No. 310000001 and Up
Model No. 79551—Serial No. 310000001 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 GrandStand 74550

  • Page 1 Model No. 79548—Serial No. 310000001 and Up Model No. 79549—Serial No. 310000001 and Up Model No. 79551—Serial No. 310000001 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: Table Of Contents

    Slope Indicator............. 7 additional information, contact an Authorized Service Safety and Instructional Decals ......8 Dealer or Toro Customer Service and have the model Product Overview ............12 and serial numbers of your product ready. Figure 1 Controls ............. 12 identifies the location of the model and serial numbers Specifications .............
  • Page 3 Think Safety First ..........15 Servicing the Brake..........45 Operating the Parking Brake ....... 15 Belt Maintenance............ 47 Operating the Mower Blade Control Switch Replacing the Mower Deck Belt ......47 (PTO) ............16 Replacing the Pump Drive Belt ......47 Operating the Throttle ........

  • 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. 98-5954 1-403005 Battery Symbols Some or all of these symbols are on your battery 1.
  • Page 9 110-2067 115-4186 1. Interval 2. Power Take-off (PTO) 3. Parking brake 4. Neutral 5. Operator presence switch 6. Battery 110-2068 1. Read the Operator’s Manual. 115-4212 1. Hydraulic oil level 3. Warning—do not touch the hot surface. 2. Read the Operator’s Manual.
  • Page 10 117-0456 1. Height of cut (HOC)—high 3. Height of cut (HOC)—low 2. Height of cut (HOC)—medium 117-0486 117-0485 117-0454 1. Traction control 3. Slow 5. Reverse 7. Operator presence switch 2. Fast 4. Neutral 6. Power Take-off (PTO)—disengage...
  • Page 11 117–3626 1. Warning—read the Operator’s Manual. 5. Thrown object hazard—keep bystanders a safe distance from the machine. 2. Warning—do not operate this machine unless you are trained. 6. Warning—engage the parking brake, stop the engine and remove the spark plug wire before performing any maintenance on the machine.

  • Page 12: Product Overview

    Product Overview g012844 Figure 4 1. Parking brake lever 8. Fuel cap Figure 3 2. Choke 9. Height-of-cut pin 1. Side discharge chute 7. Control levers 3. Hour meter 10. Platform latch 2. Battery 8. Manual tube 4. Ignition switch 11.

  • Page 13: Specifications

    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. Figure 5 48 inch mowers: 1.

  • Page 14: 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 15: 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 16: Operating The Mower Blade Control Switch (Pto)

    G009174 Figure 9 Figure 7 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 10). Pull the brake lever back and over into the slot and push the parking brake lever forward.

  • Page 17: Operating The Ignition Switch

    Using the Speed Control Lever This machine has a speed control lever that sets the maximum ground speed of the machine. This can be adjusted to the operator’s desired speed. It is recommended to use the slowest speed for new operator’s.

  • Page 18: Starting And Stopping The Engine

    Figure 15 7. Turn the ignition key to the Start position G008948 (Figure 12). When the engines starts, release the key. Figure 14 Important: Do not engage starter for more 1. On 2. Off than 5 seconds at a time. If the engine fails to start allow a 15 second cool-down period between attempts.

  • Page 19: The Safety Interlock System

    Stopping the Engine The Safety Interlock System CAUTION CAUTION Children or bystanders may be injured if they If safety interlock switches are disconnected or move or attempt to operate the tractor while it is damaged the machine could operate unexpectedly unattended.

  • Page 20: Operating The Platform

    Operating the Machine with the 3. Move the right side motion control lever to the center, un-locked position. The blades should Platform Up not rotate. Operating the machine with the platform up is 4. Move the motion control levers forward. The recommended when: engine should kill.

  • Page 21: Driving Forward Or Backward

    G012182 Figure 20 1. Front reference bar 4. Right control lever 5. Right control lever in the 2. Left control lever neutral lock position 3. Rear reference bar 3. To go forward, move the speed control lever to the desired speed. Figure 19 4.

  • Page 22: Stopping The Machine

    Set the parking brake when you leave the machine; refer to Setting the Parking Brake in Operation. 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.

  • Page 23: Transporting Machines

    4. Push the machine to the desired location. extend beyond the rear tires is recommended instead of individual ramps for each side of the unit (Figure 25). 5. Set the parking brake. The platform when down and locked into position, 6.

  • Page 24: Side Discharging Or Mulching The Grass

    1. Move the height-of-cut lever to the transport position (all the way up). 2. Select a hole in the height-of-cut bracket corresponding to the height-of-cut desired and, insert the pin (Figure 26). 3. Lower the height-of-cut lever to the pin (Figure 26). Figure 25 1.

  • Page 25: Adjusting The Flow Baffle

    Figure 28 3. Rotate cam to increase or 1. Cam lock decrease locking pressure Figure 27 2. Lever 4. Slot 1. Bushing 4. Bolt 2. Anti-scalp roller 5. Nut 3. Spacer Positioning the Flow Baffle The following figures are only recommendations for Adjusting the Flow Baffle use.

  • Page 26: Using The Mid-Size Weight

    • Use in tall, dense grass mowing conditions. • 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: Maintenance

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

  • Page 28: Premaintenance Procedures

    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 and disconnect the spark plug wires from the spark plugs before you do any maintenance.

  • Page 29: Release The Cushion For Rear Access

    Figure 34 1. Remove battery 2. With two people, lift the front end of the mower Figure 35 (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 30: Lubrication

    Lubrication Grease with No. 2 general purpose lithium base or molybdenum base grease. Lubricate the traction rollers with a dry lubricant (PTFE). 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 31: Greasing The Front Caster Pivots

    Important: Use only a dry PTFE (Polytetrafluoroethylene) lubricant. Do not use a wet oil film, which will attract dust and dirt. Figure 40 1. Seal guard 2. Spacer nut with wrench flats g013192 2. Remove the caster wheel from the caster forks. Figure 39 3.

  • Page 32: Engine Maintenance

    Engine Maintenance 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 axle does not extend beyond either nut. Servicing the Air Cleaner 14. Reinstall the seal guards over the wheel hub and insert wheel into caster fork.
  • Page 33 Figure 42 FS Model Engine Shown 1. Cover 3. Paper element 2. Hose clamp 4. Foam element Cleaning the Foam Air Cleaner Element Figure 41 Service Interval: Every 25 hours FH Model Engine Shown 1. Wash the foam element in liquid soap and warm 1.

  • Page 34: Servicing The Engine Oil

    Checking the Engine Oil Level 2. Place the air cleaner assembly onto the air cleaner base or hose and secure it (Figure 41). Note: Check the oil when the engine is cold. 3. Place the air cleaner cover into position and tighten the cover knob (Figure 41).
  • Page 35 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). G008792 Figure 44 Figure 45...

  • Page 36: Servicing The Spark Plug

    G008796 Figure 46 Changing the Engine Oil Filter 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. 2. Place a rag under the oil filter to soak up any spilled G012845 Figure 47 oil.
  • Page 37 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.

  • Page 38: Fuel System Maintenance

    Servicing the Fuel Filter Fuel System Maintenance Replacing the Fuel Filter Service Interval: Every 800 hours/Yearly (whichever Draining the Fuel Tank comes first) Note: There is no other recommended way to drain Never install a dirty filter if it is removed from the fuel fuel from the tank, other than using a syphon pump.

  • Page 39: Electrical System Maintenance

    Electrical System WARNING Maintenance Incorrect battery cable routing could damage the machine and cables causing sparks. Sparks can cause the battery gasses to explode, resulting in Servicing the Battery personal injury. • Always Disconnect the negative (black) battery Service Interval: Every 100 hours cable before disconnecting the positive (red) cable.

  • Page 40: Servicing The Fuses

    Figure 54 1. Positive Battery Post 3. Red (+) Charger Lead 2. Negative Battery Post 4. Black (-) Charger Lead Servicing the Fuses The electrical system is protected by fuses. It requires no maintenance. If a fuse blows, check the component Figure 53 or circuit for a malfunction or short.

  • Page 41: Drive System Maintenance

    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. 2. Check if the machine pulls to one side. If it does, stop the machine and set the parking brake.

  • Page 42: Checking The Tire Pressure

    Checking the Tire Pressure Service Interval: Every 50 hours/Monthly (whichever comes first) Maintain the air pressure in the rear tires at 12-14 psi (83-97 kPa). Uneven tire pressure can cause an uneven cut. Note: The front tires are semi-pneumatic tires and do not require air pressure maintenance.

  • Page 43: Adjusting The Electric Clutch

    2. Remove one bushing, then pull the spanner bushing and roller bearing out of the wheel hub (Figure 59). 3. Remove the other bushing from the wheel hub and clean any grease and dirt from the wheel hub (Figure 59). 4.

  • Page 44: Cooling System Maintenance

    Cooling System Maintenance Cleaning the Air Intake Screen Service Interval: Before each use or daily Before each use remove any build-up of grass, dirt or other debris from the cylinder and cylinder head cooling fins, air intake screen on flywheel end, and carburetor-governor levers and linkage.

  • Page 45: Brake Maintenance

    Brake Maintenance Servicing the Brake Before each use, check brakes on both a level surface and slope. Always set the parking brake when you stop the machine or leave it unattended. If the parking brake does not hold securely, an adjustment is required. Checking the Parking Brake Service Interval: Before each use or daily 1.
  • Page 46 6. Loosen the jam nut (Figure 63). 7. Rotate the yoke. To tighten the brake, rotate the yoke up. To loosen the brake, rotate the yoke down (Figure 63). 8. Secure the yoke to lower brake lever with the hair pin cotter pin and clevis pin (Figure 63).

  • Page 47: 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 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. Note: Adjust the horizontal alignment before the front to back alignment.
  • Page 49 Figure 68 1. Switch screws 3. Nut and bolt 2. Cam Figure 69 9. After the cam is adjusted, the lever switch needs to 1. Switch 3. Right motion control lever be checked. in the neutral unlocked position 10. Check the gap between the control lever and switch 2.

  • Page 50: Hydraulic System Maintenance

    Hydraulic System Maintenance Servicing the Hydraulic System Hydraulic Oil Type: Toro ® HYPR-OIL ™ ® hydraulic oil or Mobil 1 15W-50 synthetic motor oil. Hydraulic System Oil Capacity: 67 oz. (2.0 l) Figure 70 Important: Use oil specified. Other fluids could cause system damage.
  • Page 51 1 oil. refer to Bleeding Hydraulic System. Every 500 hours—Change the 12. Check the level of the fluid and add fluid, if required. hydraulic filter and hydraulic oil Do not overfill. when using Toro ® HYPR-OIL ™ hydraulic oil. WARNING Hot hydraulic fluid can cause severe burns.
  • Page 52 Replacing the Hydraulic Filter Service Interval: After the first 8 hours Every 500 hours/Yearly (whichever comes first) WARNING Hot hydraulic fluid can cause severe burns. Allow the hydraulic fluid to cool before performing any maintenance to the hydraulic system. Figure 75 1.

  • Page 53: Mower Deck Maintenance

    Mower Deck Check hydraulic hoses and hoses for leaks, loose fittings, kinked hoses, loose mounting supports, wear, weather Maintenance and chemical deterioration. Make necessary repairs before operating. Note: Keep areas around hydraulic system clean from Servicing the Cutting Blades grass and debris build up. To ensure a superior quality of cut, keep the blades sharp.
  • Page 54 Checking for Bent Blades performance and continued safety conformance of the machine, use genuine Toro replacement blades. 1. Disengage the PTO, move the motion control levers Replacement blades made by other manufacturers may to the neutral locked position and set the parking result in non-conformance with safety standards.

  • Page 55: Correcting The Mower Quality Of Cut

    position. Disconnect the spark plug wire(s) from the spark plug(s). 3. Adjust the tire pressure in the rear tires to 12-14 psi (83-97 kPa). Figure 80 4. Check that the blades and spindle shafts are not 1. Blade 2. Balancer bent.
  • Page 56 1. Change the rear tire pressure. Do this to the corresponding side that needs adjustment. 2. Locate the U-plates on the side of the engine deck (Figure 83). 3. Loosen the U-plate on one side and adjust it up or down to make the difference between measurements B and C no more than a 1/4 inch (6 mm) (Figure 83).

  • Page 57: Replacing The Grass Deflector

    5. Check the front-to-rear pitch of the cutting unit. 6. If the dimensions are not correct, adjust the front and rear nuts on either side to get the correct front-to-rear pitch (Figure 86). Figure 87 1. Measure from a level 2.

  • Page 58: Cleaning

    Cleaning 1. Remove the locknut, bolt, spring and spacer holding the deflector to the pivot brackets (Figure 89). 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 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.

This manual is also suitable for:

Grandstand 74539Grandstand 74548Grandstand 74549Grandstand 74538Grandstand 74551Grandstand 79548 ... Show all

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