Toro 74731 User Manual

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FormNo.3417-387RevB

TimeCutter

®

SS4225,SS5000,

MX4200,MX4250,MX5000,MX

5075,orMX6050RidingMower

ModelNo.74726—SerialNo.400000000andUp

ModelNo.74731—SerialNo.401400000andUp

ModelNo.74760—SerialNo.401400000andUp

ModelNo.74766—SerialNo.401300000andUp

ModelNo.74768—SerialNo.400000000andUp

ModelNo.74775—SerialNo.401300000andUp

ModelNo.74777—SerialNo.401400000andUp

ModelNo.74778—SerialNo.400000000andUp

Registeratwww.Toro.com.

OriginalInstructions(EN)

*3417-387*B

Table of Contents

Questions and Answers:

D
Debbie SpencerAug 18, 2025
Why is my Toro Lawn Mower cutting height uneven?
- C
  Christine GonzalezAug 18, 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.
E
Eric SmithAug 22, 2025
Why is my Toro 74731 Lawn Mower engine losing power?
- G
  gloriagonzalezAug 22, 2025
  If your Toro Lawn Mower engine is losing power, it could be due to several reasons: * The engine load may be excessive, so reduce ground speed. * The air cleaner may be dirty, so clean it. * The oil level in the crankcase may be low, so add oil. * The cooling fins and air passages under the engine blower housing may be plugged, so remove the obstruction. * The spark plug(s) may be pitted, fouled, or the gap may be incorrect, so install a new, correctly gapped spark plug(s). * There may be dirt in the fuel filter, so replace the fuel filter. * There may be incorrect fuel in the fuel tank, so drain the tank and replace the fuel with the proper type.
F
Frank WilsonAug 25, 2025
How to fix abnormal vibration in my Toro 74731 Lawn Mower?
- A
  Angel BrownAug 26, 2025
  Abnormal vibration in your Toro Lawn Mower can be caused by: * Loose engine mounting bolts: Tighten them. * A loose engine pulley, idler pulley, or blade pulley: Tighten the appropriate pulley. * Bent or unbalanced cutting blade(s): Install a new cutting blade(s). * A loose blade mounting bolt: Tighten the blade mounting bolt.
R
Roy WeaverAug 27, 2025
What causes an uneven cut with my Toro 74731?
- D
  David YoungAug 28, 2025
  An uneven cut with your Toro Lawn Mower can result from: * Dull blade(s): Sharpen the blade(s). * Bent cutting blade(s): Install a new cutting blade(s). * Mower not level: Level the mower from side-to-side and front-to-rear. * Anti-scalp wheel not set correctly: Adjust the anti-scalp wheel height. * Dirty mower underside: Clean the underside of the mower. * Incorrect tire pressure: Adjust the tire pressure.
B
Brittany GloverAug 30, 2025
What to do if my Toro 74731 has an abnormal vibration?
- G
  gonzalezphyllisAug 30, 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.
M
Mr. Robert EdwardsSep 3, 2025
What to do if the blades do not rotate on my Toro 74731 Lawn Mower?
- K
  Krista AndrewsSep 3, 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.
A
adamskatelynSep 5, 2025
What to do if my Toro Lawn Mower engine overheats?
- J
  Jessica PowellSep 5, 2025
  If your Toro Lawn Mower engine is overheating, there are several potential causes. You can: * Reduce ground speed, as the engine load may be excessive. * Add oil to the crankcase, as the oil level may be low. * Remove any obstructions from the cooling fins and air passages under the engine blower housing. * Clean or replace the air cleaner element if it is dirty.
L
Lauren WoodsSep 8, 2025
What to do if my Toro Lawn Mower starter does not crank?
- K
  Kimberly CherrySep 9, 2025
  If the starter on your Toro Lawn Mower doesn't crank, consider the following: * Ensure the blade-control switch is disengaged. * Make sure the motion-control levers are in the PARK position. * Charge the battery if it's dead. * Check the electrical connections for good contact if they are corroded or loose. * Replace the fuse if it's blown.

Toro 74731 Specifications

General

Transmission	Hydrostatic
Starter	Electric
Deck Material	Steel
Drive System	Rear Wheel Drive
Starting System	Electric

Summary

Safety

General Safety

Outlines fundamental safety rules for operating the mower.

Operation

Before Operation

Details essential safety checks and procedures before starting the mower.

Fuel Safety

Provides critical safety guidelines for handling gasoline and refueling.

Performing Daily Maintenance

Guides on daily checks before operating the machine.

Using the Safety-Interlock System

Explains the function and testing of safety interlock switches.

During Operation Safety

Crucial safety guidelines to follow while operating the mower.

Slope Safety

Provides essential safety precautions for operating the mower on slopes.

Operating the Mower Blade-Control Switch (PTO)

Explains how to engage and disengage the mower blades.

Starting the Engine

Step-by-step guide for starting the mower's engine.

Shutting Off the Engine

Procedures for safely stopping the mower's engine.

Driving the Machine

Explains how the motion-control levers operate the machine's drive system.

Using the Motion-Control Levers

Detailed guide on using levers for forward, reverse, and turning.

Using the Smart Speed™™ Control System

How to select and use the three ground speed ranges.

Adjusting the Height of Cut

How to set the mower deck to the desired cutting height.

Operating Tips

General advice for optimal mowing performance and machine care.

After Operation

After Operation Safety

Safety precautions to follow after finishing operation.

Loading the Machine

Unloading the Machine

Maintenance

Recommended Maintenance Schedule(s)

A comprehensive schedule of required maintenance tasks and intervals.

Pre-Maintenance Procedures

Lubrication

Engine Maintenance

Procedures for servicing the engine, including air cleaner.

Servicing the Air Cleaner

Servicing the Engine Oil

Information on checking and changing engine oil and filter.

Servicing the Spark Plug

Fuel System Maintenance

Electrical System Maintenance

Procedures for servicing the mower's electrical system components.

Servicing the Battery

Drive System Maintenance

Belt Maintenance

Replacing the Mower-Deck Belt

Mower Maintenance

Procedures for maintaining the mower deck and blades.

Servicing the Cutting Blades

Procedures for inspecting, sharpening, and replacing mower blades.

Blade Safety

Checking for Bent Blades

Removing the Blades

Installing the Blades

Leveling the Mower Deck

Removing the Mower Deck

Installing the Mower

Replacing the Grass Deflector

Cleaning

Washing the Underside of the Mower Deck

Storage

Storage Safety

Troubleshooting

Engine Overheats

Starter Does Not Crank

Engine Does Not Start, Starts Hard, or Fails to Keep Running

Engine Loses Power

Machine Does Not Drive

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