Toro Z Master 74143 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:

D
dobrienAug 16, 2025
Why won't my Toro Lawn Mower engine start?
- T
  Tonya McgeeAug 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.
K
Karina HudsonAug 19, 2025
What to do if my Toro Z Master 74143 starter does not crank?
- D
  Dakota MartinezAug 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.
S
Stephen ParkerAug 22, 2025
Why is my Toro Z Master 74143 Lawn Mower engine losing power?
- M
  Mr. Eric DavidsonAug 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.
K
Katherine MackAug 25, 2025
How to fix uneven cutting height on my Toro Z Master 74143 Lawn Mower?
- P
  Pamela StricklandAug 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).
B
Brandy CarterAug 28, 2025
What to do if my Toro Lawn Mower does not drive?
- N
  Nancy BrownAug 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.
A
Anthony TrujilloAug 31, 2025
Why is my Toro Z Master 74143 Lawn Mower engine overheating?
- T
  Tracy ParkerAug 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.
E
Edward PearsonSep 3, 2025
Why is my Toro Lawn Mower vibrating so much?
- K
  Kristopher FrancoSep 3, 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).
H
Helen VillegasSep 6, 2025
Why are the blades not rotating on my Toro Z Master 74143?
- D
  Debra LiuSep 6, 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.
V
Vanessa Nguyen DDSSep 9, 2025
Why does my Toro Z Master 74143 Lawn Mower pull to one side?
- K
  Kathleen JonesSep 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.

Toro Z Master 74143 Specifications

General

Brand	Toro
Model	Z Master 74143
Category	Lawn Mower
Language	English

Summary

Safety

Safe Operating Practices

Guidelines for safe operation of the mower.

Slope Operation

Procedures and precautions for mowing on slopes.

Product Overview

Controls

Description of the machine's control panel and functions.

Specifications

Operation

Adding Fuel

Instructions for safely adding gasoline to the fuel tank.

Filling the Fuel Tank

Detailed steps for refueling the machine.

Using the Rollover Protection System (ROPS)

Guidelines for safe operation with ROPS.

Operating the Parking Brake

Starting and Stopping the Engine

The Safety Interlock System

Driving Forward or Backward

Using the Motion Control Levers

Adjusting the Height of Cut

Transporting Machines

Operating Tips

Maintenance

Recommended Maintenance Schedule(s)

Table detailing service intervals and procedures.

Lubrication

Greasing and Lubrication

General procedures for greasing the machine.

Lubricate the Caster Wheel Hubs

Engine Maintenance

Servicing the Air Cleaner

Procedure for cleaning or replacing air filters.

Servicing the Engine Oil

Checking the Engine Oil Level

Steps to check engine oil level before operation.

Changing the Engine Oil

Changing the Engine Oil Filter

Servicing the Spark Plug

Fuel System Maintenance

Replacing the Fuel Filter

Procedure for replacing the fuel filter.

Electrical System Maintenance

Servicing the Battery

Instructions for removing and servicing the battery.

Drive System Maintenance

Adjusting the Tracking

Adjusting the Caster Pivot Bearing

Adjusting the Electric Clutch

Cooling System Maintenance

Cleaning the Engine Screen

Procedure for cleaning the engine screen for cooling.

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 Control Handle Position

Adjusting the Motion Control Linkage

Adjusting the Motion Control Damper

Adjusting the Motion Control Neutral Lock Pivot

Hydraulic System Maintenance

Servicing the Hydraulic System

Removing Hydraulic System Filters

Bleeding the Hydraulic System

Mower Deck Maintenance

Leveling the Mower Deck

Servicing the Cutting Blades

Checking for Bent Blades

Removing the Blades

Installing the Blades

Sharpening the Blades

Removing the Mower Deck

Troubleshooting

Schematics

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