Toro TimeCutter 74778 User Manual

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FormNo.3425-432RevD

TimeCutter

®

RidingMowers

ModelNo.74726—SerialNo.404314200andUp

ModelNo.74726TA—SerialNo.400000000andUp

ModelNo.74760—SerialNo.404314200andUp

ModelNo.74760TA—SerialNo.400000000andUp

ModelNo.74766—SerialNo.404314200andUp

ModelNo.74766TA—SerialNo.400000000andUp

ModelNo.74768—SerialNo.404314200andUp

ModelNo.74772—SerialNo.404314000andUp

ModelNo.74773—SerialNo.404314000andUp

ModelNo.74774—SerialNo.404310000andUp

ModelNo.74774TA—SerialNo.400000000andUp

ModelNo.74777—SerialNo.404314200andUp

ModelNo.74778—SerialNo.404314200andUp

Registeratwww.Toro.com.

OriginalInstructions(EN)

*3425-432*D

Table of Contents

Questions and Answers:

A
alexis49Aug 5, 2025
Why does my Toro TimeCutter 74778 engine not start, start hard, or fail to keep running?
- S
  stevenbanksAug 5, 2025
  Several factors can cause this issue. The fuel tank might be empty, so refill it. The air cleaner could be dirty, requiring cleaning or replacement. Check if the spark plug wire(s) is loose or disconnected and install the wire(s) on the spark plug. A spark plug(s) may be pitted, fouled, or have an incorrect gap, so install a new, correctly gapped spark plug(s). The fuel filter may be dirty, so replace it. The oil level in the crankcase might be low, so add oil to the crankcase. Finally, ensure that you are using the correct fuel type; if not, drain the tank and replace the fuel with the proper type.
T
taylorfrankAug 9, 2025
Why is my Toro Lawn Mower cutting height uneven?
- K
  Kelly SpencerAug 9, 2025
  An uneven cutting height on your Toro Lawn Mower can be due to several reasons. The blade(s) may not be sharp, so sharpen the blade(s). A cutting blade(s) may be bent, so install a new cutting blade(s). The mower might not be level, so level the mower from side-to-side and front-to-rear. An anti-scalp wheel may not be set correctly, so adjust the anti-scalp wheel height. The underside of the mower could be dirty, so clean it. Finally, the tire pressure might be incorrect, so adjust the tire pressure.
A
April FosterAug 14, 2025
What to do if the blades do not rotate on my Toro TimeCutter 74778 Lawn Mower?
- D
  David HammondAug 14, 2025
  If the blades on your Toro Lawn Mower aren't rotating, it could be due to a worn, loose, or broken drive belt, so install a new drive belt. Alternatively, the drive belt might be off the pulley, so install the drive belt and check the adjusting shafts and belt guides for the correct position. Also, the mower belt could be worn, loose, or broken, so install a new mower belt.
B
Brenda LopezAug 17, 2025
Why is my Toro TimeCutter 74778 engine losing power?
- M
  Mark DurhamAug 18, 2025
  A loss of power in your Toro Lawn Mower engine can stem from several causes: excessive engine load, which can be resolved by reducing ground speed; a dirty air cleaner, which requires cleaning; or a low oil level in the crankcase, necessitating the addition of oil. Furthermore, check for obstructions in the cooling fins and air passages under the engine blower housing and remove them if present. Ensure the spark plug(s) is in good condition; if pitted, fouled, or incorrectly gapped, replace it. Check the fuel filter for dirt and replace if necessary. Finally, if you are using incorrect fuel, drain the tank and replace it with the proper type.
B
Brett WongAug 22, 2025
What to do if my Toro TimeCutter 74778 engine overheats?
- D
  David StanleyAug 22, 2025
  If your Toro Lawn Mower engine is overheating, several factors could be the cause. First, the engine load might be excessive, so reduce the ground speed. Second, the oil level in the crankcase might be low, so add oil to the crankcase. Third, check the cooling fins and air passages under the engine blower housing for obstructions and remove them. Fourth, a dirty air cleaner can cause overheating, so clean or replace the air-cleaner element.
A
andrew90Aug 27, 2025
What to do if my Toro Lawn Mower starter does not crank?
- R
  Rebecca FullerAug 27, 2025
  If the starter on your Toro Lawn Mower isn't cranking, here are a few things to check: Ensure the blade-control switch is disengaged. Make sure the motion-control levers are in the PARK position. Verify the battery isn't dead by charging it. Inspect the electrical connections for corrosion or looseness, and ensure they have good contact. Check for a blown fuse and replace it if necessary.
P
Patricia GarciaAug 31, 2025
What to do if my Toro TimeCutter 74778 Lawn Mower has an abnormal vibration?
- J
  James HartAug 31, 2025
  If your Toro Lawn Mower is vibrating excessively, check the following: Tighten any loose engine-mounting bolts. Ensure the engine pulley, idler pulley, or blade pulley is tightened appropriately. If the cutting blade(s) is bent or unbalanced, install a new cutting blade(s). Also, tighten any loose blade-mounting bolts.

Toro TimeCutter 74778 Specifications

General

Engine Power	24.5 HP
Transmission	Hydrostatic
Deck Material	10-gauge steel
Fuel Capacity	3 gallons
Engine Displacement	708cc
Engine	Toro Commercial V-Twin
Cutting Height	1.5 - 4.5 in (3.8 - 11.4 cm)
Warranty	3-year limited
Cutting Width	54 in (137 cm)

Summary

Safety Information

Safety Alert Symbol and Definitions

Explains the Safety Alert Symbol and safety term definitions (DANGER, WARNING, CAUTION).

General Safety Precautions

Essential safety rules for operating the mower.

Slope Operation Safety

Product Overview and Controls

Operator Controls and Features

Operation: Before Starting

Pre-Operation Safety Checks

Safety precautions and checks to perform before operating the mower.

Fuel Safety

Adding Fuel

Safety-Interlock System

System Operation and Testing

Explains the safety-interlock system and how to test its functionality.

Suspension System Adjustment

MyRide Suspension System Adjustment

How to adjust the MyRide suspension for a smoother ride.

Operation: During Use Safety

General Operation Hazards and Precautions

Warnings about hot parts, exhaust fumes, and maintaining operator focus.

Moving Parts and Discharge Safety

Precautions regarding rotating parts, discharge openings, and avoiding adjustments.

Slope Operation Safety

Operating Machine Controls

Starting and Stopping the Engine

Engine Starting Procedure

Engine Shut-Off Procedure

Driving the Machine

Smart Speed™™ Control System

Cutting Height and Anti-Scalp Rollers

After Operation Procedures

After Operation Safety Checks

Safety actions to perform after finishing operation.

Transporting the Machine Safely

Loading and Unloading Procedures

Maintenance Schedule and Safety

Recommended Maintenance Schedule

A schedule of maintenance tasks based on operating hours.

General Maintenance Safety

Essential safety warnings and precautions before performing maintenance.

Lubrication Procedures

Engine Maintenance Basics

Engine Safety Precautions

Safety precautions when working on the engine.

Servicing the Air Cleaner Element

Air Cleaner Servicing Details

Engine Oil and Filter Maintenance

Engine Oil Specifications and Level Check

Changing Engine Oil and Oil Filter

Step-by-step guide to changing the engine oil and oil filter.

Spark Plug Maintenance

Spark Plug Removal and Checking

Fuel System Maintenance

Electrical System Maintenance

Electrical System Safety

Safety precautions when working with the battery and electrical system.

Removing the Battery

Battery Charging and Installation

Charging the Battery

Installing the Battery

Drive System Maintenance

Belt Maintenance

Replacing the Mower-Deck Belt

Mower Maintenance

Blade Safety and Inspection

Safety precautions for handling blades and inspecting them for damage.

Servicing the Cutting Blades

How to sharpen and replace mower blades for optimal cutting quality.

Blade Balancing and Installation

Sharpening the Cutting Blades

Installing the Mower Blades

Mower Deck Leveling

Leveling the Mower Deck Side-to-Side

Mower Deck Level Adjustments

Adjusting Side-to-Side Deck Level

Adjusting Front-to-Rear Blade Slope

How to adjust blade slope for optimal cutting performance.

Mower Deck Removal and Installation

Removing the Mower Deck

Step-by-step guide for safely removing the mower deck from the machine.

Installing the Mower Deck

Machine Storage Procedures

Storage Safety Precautions

Cleaning and Preparing for Storage

Troubleshooting Engine Problems

Engine Overheating and Starting Issues

Common causes and solutions for engine overheating and starting problems.

Engine Power Loss and Drive Issues

Troubleshooting for loss of engine power and the machine not driving.

Troubleshooting Other Machine Issues

Vibration, Uneven Cutting, and Blade Rotation

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