Toro Lawn-Boy Precision Z310 User Manual

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TimeCutter

®

Z / Precision

®

Z

Zero Radius Turn Riding Mower

Service Manual

Consumer Products

Table of Contents

Questions and Answers:

J
Joshua MuellerAug 7, 2025
Why does my Toro Lawn-Boy Precision Z310 have no power?
- S
  Sarah RiveraAug 8, 2025
  If your Toro Lawn Mower has no or low power, it could be due to several reasons. The engine speed might be too low, so adjust it to the correct setting. A bent or misaligned control linkage, a slipping drive belt, or a damaged pulley can also cause this issue; in these cases, repair or replace the linkage, drive belt, or pulley. Additionally, check the oil level and ensure it is at the proper level and not contaminated; change the oil if necessary. Excessive loading can also reduce power, so reduce the vehicle loading. Finally, a sticking bypass assembly or air trapped in the hydraulic system can be the cause; repair or replace the bypass or purge the hydraulic system.
J
jon89Aug 13, 2025
What to do if Toro Lawn-Boy Precision Z310 is operating hot?
- R
  rebecca57Aug 13, 2025
  If your Toro Lawn Mower is operating hot, it could be due to debris buildup around the transaxle; clean off any debris. A damaged cooling fan can also cause overheating; repair or replace it. Check the oil level and quality; fill to the proper level or change the oil if it's contaminated. Reduce vehicle loading if you are excessively loading the mower. Finally, air trapped in the hydraulic system can cause overheating, so purge the system.
M
Michael ClarkAug 18, 2025
Why is my Toro Lawn-Boy Precision Z310 Lawn Mower so noisy?
- J
  James ThomasAug 18, 2025
  If your Toro Lawn Mower is making excessive noise, it could be due to several factors. Check the oil level and ensure it is at the proper level or change the oil if contaminated. Reduce vehicle loading if it's excessive. Loose parts can also cause noise, so repair or replace them. A sticking bypass assembly can be the culprit, so repair or replace the linkage. Air trapped in the hydraulic system can also lead to noise, so purge the hydraulic system.
L
Laura BurtonAug 23, 2025
What to do if my Toro Lawn-Boy Precision Z310 does not drive straight?
- L
  Lori MoonAug 23, 2025
  If your Toro Lawn Mower is not driving or tracking straight, first check the vehicle tires and ensure they are inflated to the vehicle manufacturer suggested pressure. A bent or out-of-adjustment control linkage can also cause this issue; repair or replace the linkage. Finally, a sticking bypass assembly can be the cause; repair or replace the bypass.
B
Brittney ThompsonAug 27, 2025
How to fix a Toro Lawn-Boy Precision Z310 Lawn Mower transaxle oil leak?
- Y
  Yolanda MooreAug 27, 2025
  If the transaxle on your Toro Lawn Mower is leaking oil, it could be due to damaged seals, housing, or gaskets; replace the damaged component. Air trapped in the hydraulic system can also cause leaks, so purge the hydraulic system.
C
cruzjacobSep 2, 2025
Why does my Toro Lawn Mower only operate in one direction?
- M
  Miranda ChavezSep 2, 2025
  If your Toro Lawn Mower operates in only one direction, it could be due to a bent or misaligned control linkage; repair or replace the linkage. Alternatively, the drive belt might be slipping, or the pulley could be damaged; repair or replace the drive belt or pulley.

Toro Lawn-Boy Precision Z310 Specifications

General

Brand	Toro
Model	Lawn-Boy Precision Z310
Category	Lawn Mower
Language	English

Summary

Safety Information

General Information Safety

General warnings and instructions for safe operation and maintenance.

Think Safety First

Essential safety advice and precautions to prevent accidents.

Specifications

Hydro-Gear EZT Transaxle Specifications

Specifications for the Hydro-Gear EZT Hydrostatic Transaxles.

Fastener Torque Specifications

Recommended torque values for fasteners, including inch and metric.

Chassis

Chassis Belt Replacement

Detailed steps for replacing mower drive belts.

Hydro-Gear Transaxle

Hydro-Gear Transaxle Removal

Steps for removing the Hydro-Gear transaxles from the unit.

Hydro-Gear Transaxle Installation

Steps for reinstalling the transaxles onto the hydro mount frame.

Hydro-Gear Transaxle Purging Procedures

Critical steps to purge air from the hydrostatic system.

Hydro-Gear Transaxle Neutral Adjustment

Procedure for adjusting the transaxle neutral setting.

Hydro-Gear Transaxle Tracking Adjustments

How to adjust transaxle tracking for straight line travel.

Hydro-Gear Transaxle Brake Adjustment

Steps for adjusting the transaxle brake system.

Electrical System

PTO Switch Function and Testing

Information on the Power Take Off switch function and testing.

Electric PTO Clutch Resistance and Draw

Procedures for measuring coil resistance and clutch current draw.

Seat Switch Safety Function and Testing

Function, location, and testing of the seat safety switch.

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