Gravely ZT1640 User Manual (English)

Questions and Answers:

P
Patricia EdwardsAug 12, 2025
How to troubleshoot starting issues with my Gravely Lawn Mower?
- R
  Regina LeeAug 13, 2025
  If your Gravely Lawn Mower engine won't crank or start, several factors could be at play. First, ensure the safety interlock system is properly engaged and not faulty. Next, check that the fuel tanks are adequately filled and the fuel shut-off valve is open. A discharged battery or poor connection between the battery and cables can also prevent starting, so charge the battery and tighten/clean the connections as needed. Lastly, inspect the spark plug wires for looseness and the spark plugs themselves for faults, replacing if necessary.
T
twatersAug 16, 2025
Why won't my Gravely ZT1640 Lawn Mower move when using the steering levers?
- A
  Angela JensenAug 16, 2025
  If your Gravely Lawn Mower does not move with the engine running when using the steering levers, the transmission bypass lever may be engaged. Disengage the transmission bypass lever. Also, a faulty hydrostatic belt could be the issue. Replace the hydrostatic belt.
M
Mrs. Suzanne Barnett MDAug 20, 2025
What to do if PTO or mower blades do not engage on Gravely Lawn Mower?
- M
  mruizAug 20, 2025
  If the PTO or mower blades on your Gravely Lawn Mower do not engage or shut off, it could be due to several reasons. Make sure the operator presence switch is depressed by sitting on the seat. Also, check if the electric clutch connector is loose or disconnected, and connect it if necessary. Finally, a faulty PTO belt could be the culprit, so consider replacing it.
C
Christian HardyAug 25, 2025
Why is my Gravely ZT1640 engine running rough?
- A
  Ashley LeeAug 25, 2025
  If your Gravely Lawn Mower engine runs rough, the choke might be engaged, so disengage it. Also, the air filter cartridge could be plugged. In this case, clean or replace the air filter cartridge.
A
Anthony ColeAug 27, 2025
How to fix a Gravely Lawn Mower that does not travel in a straight line?
- L
  lawrence11Aug 27, 2025
  If your Gravely Lawn Mower is not traveling in a straight line, start by checking the tire pressure. If the pressure is not correct, adjust it. If that doesn't solve the issue, the steering levers may need adjustment.
A
Aaron TaylorAug 31, 2025
What causes a Gravely Lawn Mower engine to overheat?
- M
  mramirezAug 31, 2025
  If your Gravely Lawn Mower engine overheats, it may be due to a low engine oil level, so add engine oil. Another potential cause is a plugged cooling system, so clean the cooling system.
J
Johnny WhiteSep 4, 2025
How to improve cutting quality of Gravely ZT1640?
- K
  Kenneth CainSep 4, 2025
  If you observe poor cutting quality with your Gravely Lawn Mower, the mower deck may not be level or the mower pitch is incorrect. Level and adjust the pitch of the mower deck. The mower blades may also be dull or faulty, so sharpen or replace them.
P
Paul GoodmanSep 8, 2025
Why does the hour meter continue to run on my Gravely ZT1640 when the engine is off?
- K
  Karen HowellSep 8, 2025
  If the hour meter on your Gravely Lawn Mower continues to run when the engine is not running, the ignition key is likely in the run position with the engine turned off. Turn the ignition key to the off position.

Gravely ZT1640 Specifications

General

Brand	Gravely
Model	ZT1640
Category	Lawn Mower
Language	English

Summary

The Manual

Introduction

Overview of the manual's content and purpose.

Model and Serial Numbers

Location and importance of unit and engine model/serial numbers.

Product Registration

Instructions and importance of registering the product for warranty.

Unauthorized Replacement Parts

Warning against using non-genuine parts and potential consequences.

Delivery

Customer responsibilities regarding product delivery and assembly.

Safety

Safety Alerts

Explanation of safety alert symbols and their meaning for user awareness.

Safety Decals and Locations

Guidance on replacing safety decals and their placement on the unit.

Disclaimer

Safety Rules

Assembly

Check Safety Interlock System

Procedure to verify the proper functioning of the safety interlock system.

Check Function of All Controls

Ensuring all unit controls operate correctly before use.

Controls and Features

Operation

Safety Interlock System

Testing the safety interlock system for proper operation.

Adjusting Seat

Instructions for adjusting the operator's seat for comfort and leverage.

Filling Fuel Tanks

Procedure and safety guidelines for filling the fuel tanks.

Stopping in an Emergency

Steps to take to stop the unit quickly in an emergency situation.

Moving Unit Manually

How to disengage the transmission for manual movement of the unit.

Starting and Shutting Off Engine

Step-by-step guide for starting and stopping the engine.

Operating Mower

Instructions for safely operating the mower unit.

Transporting Unit

Guidelines for safely transporting the unit on a truck or trailer.

For Best Performance

Tips for achieving optimal performance from the mower.

Maintenance Schedule

Check Safety Interlock System

Routine check of the safety interlock system for continued functionality.

Check Parking Brake

Procedure to ensure the parking brake is functioning correctly.

Clean Unit

Instructions for cleaning the unit after use.

Check Tires

Checking tire pressure as per specifications.

Check Mower Blades

Inspection of mower blades for wear or damage.

Follow Engine Manual Maintenance Schedule

Referencing the engine manual for detailed maintenance tasks.

Service and Adjustments

Tipping Seat Forward

How to tip the seat forward to access the battery and engine.

Opening and Closing Hood

Instructions for opening and closing the mower's hood.

Levelling and Adjusting Pitch of Mower Deck

Level Mower Deck

Procedure to ensure the mower deck is level on a flat surface.

Adjust Pitch of Mower Deck

Steps to adjust the mower deck's front-to-back pitch.

Removing Mower Deck

Step-by-step guide for detaching the mower deck from the unit.

Opening Deck Access Plate

Procedure to open the deck access plate for inspection or service.

Sharpening Mower Blade

Replacing Mower Blade

Instructions for removing and installing mower blades.

Adjusting Anti-Scalp Roller

How to adjust anti-scalp rollers for optimal lawn care.

Serving Battery

Battery Removal and Installation

Procedure for safely removing and installing the unit's battery.

Cleaning Battery and Battery Cables

Steps to clean battery terminals and cables for optimal connection.

Charging the Battery

Guidelines for safely charging the unit's battery.

Jump-Starting

Information and warnings regarding jump-starting the unit.

Adjusting Steering Levers

Adjusting Steering Lever Height

Procedure for adjusting the height of the steering levers.

Forward and Reverse Speed Adjustment

Adjusting steering levers for proper forward and reverse travel alignment.

Replacing PTO Belt

Replacing Hydrostatic Belt

Storage

Short Term Storage

Recommendations for storing the unit for short periods.

Long Term Storage

Procedures for preparing and storing the unit for extended periods.

Troubleshooting

Engine Will Not Crank/Start

Troubleshooting steps for an engine that fails to crank or start.

Engine Runs Rough

Diagnosing and resolving issues causing the engine to run roughly.

Unit Does Not Move with Engine Running

Troubleshooting for a unit that does not move while the engine is running.

PTO or Mower Blades Do Not Engage or Shuts Off

Resolving issues with PTO or mower blades not engaging or shutting off.

Engine Overheats

Steps to take when the engine is overheating.

Unit Moves with Engine Off and Parking Brake Engaged

Troubleshooting for unintended unit movement with the engine off.

Hour Meter Continues to Run When Engine is Not Running

Diagnosing why the hour meter operates when the engine is off.

Unit Does Not Travel in a Straight Line

Addressing issues where the unit pulls to one side.

Unit Creeps with Steering Levers in Neutral Position

Troubleshooting for unit movement when steering levers are neutral.

Poor Cutting Quality

Identifying and fixing causes of poor lawn cutting quality.

Service Parts

Accessories

Specifications

Ariens Limited Warranties

2-Year Limited Lawn and Garden Consumer Warranty

Warranty details for consumer use of lawn and garden products.

2-Year Limited Lawn and Garden Commercial Warranty

Warranty details for commercial use of lawn and garden products.

3-Year Limited Sno-Thro Warranty

Warranty terms for Sno-Thro products.

DURA-CLEAN™ Auger Limited Lifetime Warranty

Lifetime warranty coverage for DURA-CLEAN™ Auger rubber components.

Exceptions, Limitations, Exclusions

Conditions, limitations, and items excluded from warranty coverage.

Limitation of Remedy and Damages

Clauses limiting the remedy and damages for warranty claims.

Disclaimer of Further Warranty

Statement disclaiming warranties beyond those expressly stated.

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Table of Contents

Questions and Answers:

Gravely ZT1640 Specifications

Summary

The Manual

Introduction

Model and Serial Numbers

Product Registration

Unauthorized Replacement Parts

Delivery

Safety

Safety Alerts

Safety Decals and Locations

Disclaimer

Safety Rules

Assembly

Check Safety Interlock System

Check Function of All Controls

Controls and Features

Operation

Safety Interlock System

Adjusting Seat

Filling Fuel Tanks

Stopping in an Emergency

Moving Unit Manually

Starting and Shutting Off Engine

Operating Mower

Transporting Unit

For Best Performance

Maintenance Schedule

Check Safety Interlock System

Check Parking Brake

Clean Unit

Check Tires

Check Mower Blades

Follow Engine Manual Maintenance Schedule

Service and Adjustments

Tipping Seat Forward

Opening and Closing Hood

Levelling and Adjusting Pitch of Mower Deck

Level Mower Deck

Adjust Pitch of Mower Deck

Removing Mower Deck

Opening Deck Access Plate

Sharpening Mower Blade

Replacing Mower Blade

Adjusting Anti-Scalp Roller

Serving Battery

Battery Removal and Installation

Cleaning Battery and Battery Cables

Charging the Battery

Jump-Starting

Adjusting Steering Levers

Adjusting Steering Lever Height

Forward and Reverse Speed Adjustment

Replacing PTO Belt

Replacing Hydrostatic Belt

Storage

Short Term Storage

Long Term Storage

Troubleshooting

Engine Will Not Crank/Start

Engine Runs Rough

Unit Does Not Move with Engine Running

PTO or Mower Blades Do Not Engage or Shuts Off

Engine Overheats

Unit Moves with Engine Off and Parking Brake Engaged

Hour Meter Continues to Run When Engine is Not Running

Unit Does Not Travel in a Straight Line

Unit Creeps with Steering Levers in Neutral Position

Poor Cutting Quality

Service Parts

Accessories

Specifications

Ariens Limited Warranties

2-Year Limited Lawn and Garden Consumer Warranty

2-Year Limited Lawn and Garden Commercial Warranty

3-Year Limited Sno-Thro Warranty

DURA-CLEAN™ Auger Limited Lifetime Warranty