Toro GrandStand 74578

Questions and Answers

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duncanryanAug 4, 2025
How to troubleshoot starting issues with my Toro GrandStand 74578?
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  Matthew MyersAug 5, 2025
  If your Toro Lawn Mower engine won't start, starts with difficulty, or stops running, several factors could be at play. First, ensure the fuel tank isn't empty and the shut-off valve is open by filling the tank and opening the valve. Then, make sure the choke is engaged by moving the choke lever to the choke position. Check that the spark plug wire is securely connected to the spark plug. Inspect the spark plug itself; if it's damaged or improperly gapped, replace it with a new one. Also, a dirty air cleaner can cause issues, so service the air cleaner element. Finally, a clogged fuel filter can be the culprit, so replace it if necessary.
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Nicole HarrisAug 9, 2025
Why is my Toro GrandStand 74578 Lawn Mower losing power?
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  Sharon SmithAug 9, 2025
  If your Toro Lawn Mower engine is losing power, it could be due to several reasons. Start by reducing the ground speed, as the engine load might be excessive. Check the air cleaner and service it if it's dirty. Ensure the oil level in the crankcase is adequate; add oil if it's low. Clear any obstructions from the cooling fins and air passages under the engine blower housing. Replace the spark plug if it's pitted, fouled, or has an incorrect gap. Clean or replace the fuel cap if the vent hole is plugged. Also, replace the fuel filter if it's dirty.
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Gregory KellerAug 13, 2025
How to fix uneven cutting height on my Toro GrandStand 74578?
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  Chad HernandezAug 13, 2025
  If your Toro Lawn Mower's cutting height is uneven, several factors could be the cause. Start by sharpening the blades if they are dull. Replace the cutting blades if they are bent. Level the mower deck from side to side and adjust the front-to-rear pitch. Clean the underside of the mower deck if it's dirty. Finally, adjust the tire pressure to the correct level.
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jose24Aug 17, 2025
What to do if my Toro Lawn Mower has abnormal vibration?
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  Pamela CardenasAug 17, 2025
  If your Toro Lawn Mower is vibrating abnormally, it could be due to several reasons. Check the cutting blades; if they are bent or unbalanced, replace them. Ensure the blade mounting bolt is tightened securely. Also, check the engine mounting bolts and tighten them if they are loose. Inspect the engine pulley, idler pulley, or blade pulley and tighten any loose ones.
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khoodAug 21, 2025
Why is my Toro GrandStand 74578 Lawn Mower engine overheating?
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  sharonsmithAug 21, 2025
  If your Toro Lawn Mower engine is overheating, it could be due to a few reasons. First, reduce the ground speed because the engine load might be excessive. Second, ensure the oil level in the crankcase is sufficient; add oil if it's low. Finally, check the cooling fins and air passages under the engine blower housing and remove any obstructions.
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David FoxAug 26, 2025
What to do if my Toro GrandStand 74578 Lawn Mower does not drive?
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  Sylvia AdamsAug 26, 2025
  If your Toro Lawn Mower does not drive, it could be due to several reasons. Check the hydraulic oil reservoir and add hydraulic oil if it's low. Bleed the air out of the hydraulic system. Replace the pump drive belt if it's slipping. Replace the pump drive belt idler spring if it's missing. Tighten the by-pass valves to a torque of 12 to 15 N-m (9 to 11 ft-lb) if the pump by-pass valves are open.
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April SilvaAug 30, 2025
Why blades do not rotate on my Toro Lawn Mower?
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  Grant CarrilloAug 30, 2025
  If the blades on your Toro Lawn Mower aren't rotating, check the belt tension of the pump drive belt. Install the drive belt and check adjusting shafts and belt guides for correct position if the pump drive belt is off the pulley. Install a new deck belt if the mower deck belt is worn, loose, or broken. Install the deck pulley and check the idler pulley, idler arm, and spring for correct position and function if the mower deck belt is off the pulley. Replace the spring if the idler spring is broken or missing. Adjust the clutch air gap if the electric clutch is out of adjustment.

Summary

Safety Information

Safe Operating Practices

Follow ANSI standard B71.4-2012 for safe operation.

Preparation and Gear

Operational Safety Rules

Fuel Handling Safety

Precautions for handling flammable gasoline to prevent fire or explosion.

Maintenance and Hauling Safety

Mower Safety Guidelines

Safety for general operation, slopes, and servicing the mower.

Decals and Symbols

Product Overview and Controls

Controls and Indicators

Operating the Machine

Adding Fuel Safely

Instructions on using correct gasoline type and safe fueling practices.

Gasoline Hazards and Storage

Warnings about gasoline's flammability and safe storage.

Controls Operation

Mower Blade Engagement

How to engage and disengage the mower blades using the PTO switch.

Starting and Stopping

Ignition Switch Operation

How to use the ignition switch to start and stop the engine.

Engine Starting Procedure

Step-by-step guide to starting the mower engine.

Safety Systems and Platform

Safety-interlock System Test

Procedure to test the safety interlock system before each use.

Driving and Stopping

Driving Forward and Backward

Procedures for controlling machine movement using motion-control levers.

Stopping the Machine

Steps to safely stop the mower and disengage components.

Mower Deck Adjustments

Height-of-Cut Adjustment

How to adjust the cutting height for different grass lengths.

Maintenance Schedule

Maintenance Intervals and Procedures

Lists maintenance tasks for first 8 hours, daily, periodic, and yearly.

Pre-Maintenance Procedures

Raising Mower for Access

How to safely raise the mower for maintenance access.

Engine Maintenance

Air Cleaner Servicing

Cleaning and replacing foam and paper air filter elements.

Engine Oil Servicing

Checking and changing engine oil and oil filter.

Engine Oil Procedures

Checking Engine Oil Level

Changing Engine Oil and Filter

Steps for draining and refilling engine oil and replacing the oil filter.

Spark Plug and Fuel System

Spark Plug Servicing

Removing, checking, and installing spark plugs.

Fuel System Maintenance

Draining the Fuel Tank

Procedure for safely draining the fuel tank.

Fuel Filter Replacement

Electrical System Maintenance

Battery Care

Keeping battery clean, charged, and preventing terminal corrosion.

Battery Removal, Installation, and Charging

Drive System Maintenance

Adjusting Tracking

Brake Maintenance

Checking Parking Brake

Brake Adjustment Procedures

Adjusting the Brakes

Belt Maintenance

Replacing Mower-deck Belt

Belt Replacement

Replacing Pump-drive Belt

Controls System Maintenance

Adjusting Motion-control Handle Positions

Motion-Control Lever Adjustments

Adjusting Neutral Position

Hydraulic System Maintenance

Servicing the Hydraulic System

Checking and maintaining the hydraulic system.

Checking Hydraulic Fluid

Hydraulic Fluid and Filter

Replacing Hydraulic Fluid

Replacing Hydraulic Filter

Mower Deck Maintenance

Servicing Cutting Blades

Inspecting, sharpening, and replacing mower blades.

Blade Procedures

Removing and Installing Blades

Sharpening Blades

Mower Deck Height Adjustment

Correcting Quality-of-Cut

Adjusting deck height and leveling for even cuts.

Checking Deck Side-to-Side Height

Deck Pitch Adjustment

Changing Deck Front-to-Rear Pitch

Adjusting deck pitch for optimal cutting performance.

Troubleshooting

Engine Starting and Power Issues

Causes and solutions for engine not starting, running poorly, or losing power.

Engine Overheating and Drive Problems

Abnormal Vibration

Mower Performance Issues

Uneven Cutting Height

Adjusting deck and tire pressure for an even cut.

Blades Not Rotating

Troubleshooting why mower blades are not engaging or rotating.

Toro Warranty Information

Warranty Coverage and Service

Owner Responsibilities and Exclusions

Toro GrandStand 74578 Specifications

General

Cutting Width	52 inches
Transmission	Hydrostatic
Spindle Material	Cast aluminum
Deck Material	7-gauge steel
Blade Tip Speed	18, 500 fpm
Caster Tires	11 x 4.00-5
Drive Tires	20 x 10.00-8
Cutting Height	1.5 - 5 inches