Toro Z Master 74145 User Manual

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FormNo.3372-548RevC

ZMaster

®

RidingMower

with48in,52inor60inTURBOFORCE

®

Side

DischargeMower

ModelNo.74141—SerialNo.312000001andUp

ModelNo.74143—SerialNo.312000001andUp

ModelNo.74145—SerialNo.312000001andUp

ToregisteryourproductordownloadanOperator'sManualorPartsCatalogatnocharge,gotowww.Toro.com.OriginalInstructions(EN)

Table of Contents

Questions and Answers:

B
boothdanielleAug 16, 2025
Why won't my Toro Z Master 74145 Lawn Mower engine start?
- S
  Stephen NelsonAug 16, 2025
  If your Toro Lawn Mower engine won't start, starts with difficulty, or stalls, several factors could be at play. First, make sure the fuel tank isn't empty and the fuel shutoff valve is open. Check the oil level in the crankcase and add oil if it's low. Ensure the throttle is midway between the “SLOW” and “FAST” positions, and the choke is “ON” for a cold engine or “OFF” for a warm one. Other potential causes include a dirty fuel filter (replace it), a dirty air cleaner (clean or replace it), a faulty spark plug (clean, adjust, or replace it), or a disconnected spark plug wire (check the connection). Also, verify the seat switch is functioning correctly, and the electrical connections are clean and secure.
S
Sarah AllisonAug 19, 2025
What to do if my Toro Z Master 74145 Lawn Mower starter does not crank?
- H
  Heather JohnsonAug 19, 2025
  If the starter on your Toro Lawn Mower doesn't crank, there are several things to check. First, ensure the blade control switch (PTO) is disengaged and the parking brake is set. The drive levers should be in the neutral lock position, and you must be seated. If these aren't the issue, check if the battery is dead and needs charging. Also, inspect the electrical connections for corrosion or looseness, and replace the fuse if it's blown.
A
Amy MorrisonAug 22, 2025
Why is my Toro Z Master 74145 engine losing power?
- J
  Jonathan PierceAug 22, 2025
  If your Toro Lawn Mower engine is losing power, consider these potential causes: the engine load might be excessive, so reduce the ground speed. A dirty air cleaner can also cause power loss, so clean it. Check the oil level in the crankcase and add oil if needed. Make sure the cooling fins and air passages above the engine aren't blocked, and the vent hole in the fuel cap isn't plugged. Finally, a dirty fuel filter can restrict fuel flow, so replace it.
O
ortegadaltonAug 26, 2025
How to fix uneven cutting height on my Toro Z Master 74145?
- G
  Gregory TorresAug 26, 2025
  To address uneven cutting height with your Toro Lawn Mower, consider these factors: the blades might not be sharp (sharpen them) or could be bent (install new ones). Also, the mower deck might not be level (level it from side-to-side and front-to-rear). Check if the underside of the mower is dirty (clean it) and ensure the tire pressure is correct (adjust it).
F
Felicia RamirezAug 28, 2025
What to do if my Toro Z Master 74145 does not drive?
- B
  Brandy WintersAug 28, 2025
  If your Toro Lawn Mower isn't driving, check that the by pass valves are closed tight. Inspect the pump belt for wear, looseness, or breakage, and change the belt if necessary. Also, make sure the pump belt is properly on the pulley. Look for a broken or missing idler spring and replace it if needed. Finally, verify that the hydraulic oil level is adequate and not too hot; add hydraulic oil or let it cool down.
P
Patrick SanchezAug 31, 2025
Why is my Toro Lawn Mower engine overheating?
- M
  millerelizabethAug 31, 2025
  If your Toro Lawn Mower engine is overheating, here are a few things to investigate: First, check if the engine load is too high and reduce the ground speed. Also, ensure that the oil level in the crankcase is sufficient; add oil if it's low. Lastly, inspect the cooling fins and air passages above the engine for any blockages and remove them.
D
ddavisSep 3, 2025
Why is my Toro Lawn Mower vibrating so much?
- M
  Michael CarpenterSep 4, 2025
  If your Toro Lawn Mower is vibrating abnormally, check the following: * The cutting blades may be bent or unbalanced (install new blades). * The blade mounting bolt might be loose (tighten it). * The engine mounting bolts could be loose (tighten them). * A loose engine pulley, idler pulley, or blade pulley (tighten the appropriate pulley).
W
William AcostaSep 6, 2025
Why are the blades not rotating on my Toro Lawn Mower?
- M
  Mark TaylorSep 7, 2025
  If the blades on your Toro Lawn Mower aren't rotating, check the mower deck belt for wear, looseness, or breakage, and install a new deck belt if needed. Also, ensure the mower deck belt is properly on the pulley, checking the idler pulley, idler arm, and spring for correct position and function. Inspect the pump drive belt for wear, looseness, or breakage, checking the belt tension or installing a new belt. Finally, look for a broken or missing idler spring and replace it.
M
mvelezSep 9, 2025
Why does my Toro Lawn Mower pull to one side?
- D
  Daniel RomanSep 9, 2025
  If your Toro Lawn Mower pulls to the left or right even with the levers fully forward, it could be due to tracking needing adjustment or incorrect tire pressure in the drive tires. Adjust the tracking and ensure the tire pressure in the drive tires is correct.
M
Mrs. Lori Obrien MDSep 12, 2025
What causes the clutch to not engage on my Toro Z Master 74145?

Toro Z Master 74145 Specifications

General

Series	Z Master
Model Number	74145
Horsepower / Engine Power	24 hp
Engine Displacement	726cc
Tires (Front)	13 x 6.5-6
Turning Radius	Zero-turn
Product Type	Zero Turn Mower
Blade Tip Speed	18, 500 ft/min
Seat Type	Suspension Seat
Speed Range	0 - 10 mph

Summary

Safety

Safe Operating Practices

General instructions for safe operation based on ANSI standards.

Slope Operation

Specific safety guidelines for operating the machine on slopes.

Think Safety First

Reminder to review safety instructions and symbols.

Operating the Parking Brake

Instructions on how to set and use the parking brake.

Operation

Adding Fuel

Instructions for safely adding fuel to the machine.

Filling the Fuel Tank

Step-by-step guide for filling the fuel tank safely.

Checking the Engine Oil Level

Procedure for checking the engine oil level.

Using the Rollover Protection System (ROPS)

Detailed instructions on lowering and raising the ROPS for operation.

Operating the Mower Blade Control Switch (PTO)

Releasing the Parking Brake

Operating the Ignition Switch

Starting and Stopping the Engine

Starting the Engine

Steps to follow to start the engine safely.

Stopping the Engine

Instructions on how to safely stop the engine.

The Safety Interlock System

Understanding the Safety Interlock System

Explains how the safety interlock system prevents unintended operation.

Testing the Safety Interlock System

Daily procedure to verify the safety interlock system is functioning.

Driving Forward or Backward

Using the Motion Control Levers

Detailed operation of the motion control levers for driving.

Driving Forward

Steps to drive the machine forward.

Driving Backward

Steps to drive the machine backward.

Stopping the Machine

Adjusting the Height of Cut

Maintenance

Recommended Maintenance Schedule(s)

A schedule outlining maintenance tasks based on service intervals.

Lubrication

Greasing and Lubrication

General instructions for greasing the machine.

Where to Grease the Mower

Specific points on the mower requiring greasing.

Engine Maintenance

Servicing the Air Cleaner

Servicing the Engine Oil

Changing the Engine Oil

Servicing the Spark Plug

Fuel System Maintenance

Replacing the Fuel Filter

Electrical System Maintenance

Servicing the Battery

Installing the Battery

Servicing the Fuses

Drive System Maintenance

Checking the Seat Belt

Adjusting the Tracking

Cooling System Maintenance

Cleaning the Engine Screen

Cleaning the Engine Cooling Fins and Shrouds

Belt Maintenance

Inspecting the Belts

Replacing the Mower Belt

Replacing the Hydraulic Pump Drive Belt

Controls System Maintenance

Adjusting the Motion Control Linkage

Hydraulic System Maintenance

Servicing the Hydraulic System

Checking the Hydraulic Oil Level

Changing the Hydraulic System Filter and Oil

Bleeding the Hydraulic System

Mower Deck Maintenance

Leveling the Mower Deck

Servicing the Cutting Blades

Removing the Mower Deck

Troubleshooting

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