Gravely ZT1840 User Manual (English)

Questions and Answers:

M
misty12Aug 13, 2025
How to troubleshoot starting issues with my Gravely Lawn Mower?
- C
  Christina PhillipsAug 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
Tina WalkerAug 17, 2025
Why won't my Gravely ZT1840 move when using the steering levers?
- D
  Dominique LozanoAug 17, 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.
S
Sharon SanchezAug 21, 2025
What to do if PTO or mower blades do not engage on Gravely ZT1840?
- K
  Kathryn CampbellAug 21, 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.
J
jwhiteAug 25, 2025
Why is my Gravely ZT1840 engine running rough?
- W
  wvaughnAug 26, 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.
R
roseoliviaAug 28, 2025
How to fix a Gravely Lawn Mower that does not travel in a straight line?
- S
  Sherry Moreno DVMAug 28, 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.
H
Helen MackSep 1, 2025
What causes a Gravely Lawn Mower engine to overheat?
- S
  Susan LeeSep 1, 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.
C
craigmarshallSep 5, 2025
How to improve cutting quality of Gravely Lawn Mower?
- D
  Daniel TorresSep 5, 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.
E
Elizabeth JohnsonSep 9, 2025
Why does the hour meter continue to run on my Gravely ZT1840 Lawn Mower when the engine is off?
- E
  ericjohnsonSep 9, 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 ZT1840 Specifications

General

Engine Displacement	726 cc
Transmission	Hydrostatic
Turning Radius	Zero-turn
Horsepower	23 HP
Cutting Height	1.5 - 4.5 inches
Warranty	3 years

Summary

Safety

Safety Alerts

Symbols used to point out important safety precautions and their meaning.

Notations

General reference information for proper operation and maintenance practices.

Safety Decals and Locations

Information about replacing missing or damaged safety decals.

Assembly

Tools Required

Lists the tools needed for assembly.

Unpack Unit

Instructions for removing the unit from its shipping container.

Connect Battery

Procedure for connecting the unit's battery.

Place Unit in Operating Position

Steps to position the unit for operation, including seat and steering levers.

Check Engine Oil Level

Instruction to refer to the Engine Manual for checking oil level.

Check Tire Pressure

Instruction to refer to Specifications for tire pressure.

Level Mower Deck

Instruction to refer to levelling and adjusting pitch of mower deck.

Fill Fuel Tanks

Instruction to refer to filling fuel tanks.

Adjust Seat

Instruction to refer to adjusting seat.

Check Safety Interlock System

Warning and instruction to check the safety interlock system.

Check function of all controls

Instruction to refer to Operation section for checking controls.

Controls and Features

Ignition Switch

Controls the starting, running, and stopping of the engine.

PTO Switch

Engages and disengages the mower blades.

Throttle Lever

Controls engine speed.

Seat

Operator's seating position.

Steering Levers

Control the direction and speed of the unit.

Parking Brake

Engages and disengages the parking brake.

Fuel Tanks

Holds the fuel for the engine.

Headlights

Provides illumination for operation in low light.

Axle Lock

Locks the front axle for stability.

Mower Lift Pedal

Raises and lowers the mower deck.

Mower Deck

The cutting unit of the mower.

Discharge Chute

Directs clippings away from the unit.

Fuel Shut-Off Valve

Controls fuel flow to the engine.

Choke Control

Assists in starting a cold engine.

Hour meter

Records the total hours the engine has been run.

Operation

Safety Interlock System

Tests to ensure the safety interlock system is working properly.

Mower Lift Pedal

Adjusting Seat

Procedure for adjusting the operator's seat position.

Filling Fuel Tanks

Steps for safely filling the fuel tanks.

Stopping in an Emergency

Procedure for stopping the unit in an emergency situation.

Moving Unit Manually

Instructions for moving the unit when the engine is off.

Starting and Shutting Off Engine

Starting the Engine

Step-by-step guide to starting the engine.

Stopping the Engine

Procedure for safely stopping the engine.

Operating Mower

Steps for operating the mower with the engine running.

Transporting Unit

Safety precautions and steps for transporting the unit.

For Best Performance

Tips for optimizing mower performance.

Maintenance Schedule

Check Safety Interlock System

Procedure for checking the safety interlock system.

Check Parking Brake

Procedure for checking the parking brake.

Clean Unit

Instructions for cleaning the unit.

Check Tires

Instruction to check tire pressure per specifications.

Check Mower Blades

Instructions for checking mower blades for wear or damage.

Follow Engine Manual Maintenance Schedule

Instructions to perform scheduled engine maintenance.

Service and Adjustments

Tipping Seat Forward

Procedure for tipping the seat forward to access components.

Opening and Closing Hood

Instructions for opening and closing the unit's hood.

Levelling and Adjusting Pitch of Mower Deck

Level Mower Deck

Steps to ensure the mower deck is level.

Adjust Pitch of Mower Deck

Procedure for adjusting the mower deck pitch.

Removing Mower Deck

Remove

Steps for removing the mower deck from the unit.

Install

Steps for installing the mower deck onto the unit.

Opening Deck Access Plate

Procedure for opening the deck access plate.

Replacing Mower Blade

Remove

Steps for removing mower blades.

Install

Steps for installing mower blades.

Sharpening Mower Blade

Discard Mower Blade

Criteria for discarding worn or damaged mower blades.

Adjusting Anti-Scalp Roller

Highest Position

Use to disable anti-scalp feature.

Lowest Position

Use for all cutting positions.

Serving Battery

Battery Removal and Installation

Procedures for removing and installing the battery.

Cleaning Battery and Battery Cables

Steps for cleaning battery terminals and cables.

Charging the Battery

Jump-Starting

Information on jump-starting the unit.

Adjusting Steering Levers

Adjusting Steering Lever Height

Procedure to adjust the height of the steering levers.

Forward and Reverse Speed Adjustment

Procedure to adjust the steering lever travel for speed.

Replacing PTO Belt

Remove

Steps to remove the PTO belt.

Install

Steps to install the PTO belt.

Replacing Hydrostatic Belt

Remove

Steps to remove the hydrostatic belt.

Install

Steps to install the hydrostatic belt.

Storage

Short Term Storage

Instructions for short-term storage of the unit.

Long Term Storage

Instructions for long-term storage of the unit.

Troubleshooting

Engine will not crank/start

Probable causes and corrections for engine starting issues.

Engine runs rough

Probable causes and corrections for rough engine operation.

Unit does not move with engine running when using steering levers

Causes and corrections for unit not moving.

PTO or mower blades do not engage or shuts off

Causes and corrections for PTO or blade engagement issues.

Engine overheats

Probable causes and corrections for engine overheating.

Ariens Limited Warranties

2-Year Limited Lawn and Garden Consumer Warranty

Warranty terms for consumer lawn and garden products.

2-Year Limited Lawn and Garden Commercial Warranty

Warranty terms for commercial lawn and garden products.

3-Year Limited Sno-Thro Warranty

Warranty terms for Sno-Thro products.

DURA-CLEAN™ Auger Limited Lifetime Warranty

Warranty terms for DURA-CLEAN™ Auger rubber components.

Exceptions, Limitations, Exclusions

Limitation of Remedy and Damages

Ariens Company's liability and limitations on damages.

Disclaimer of Further Warranty

Information regarding implied warranties and state-specific rights.

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Gravely ZT1840 User Manual

Table of Contents

Questions and Answers:

Gravely ZT1840 Specifications

Summary

Safety

Safety Alerts

Notations

Safety Decals and Locations

Assembly

Tools Required

Unpack Unit

Connect Battery

Place Unit in Operating Position

Check Engine Oil Level

Check Tire Pressure

Level Mower Deck

Fill Fuel Tanks

Adjust Seat

Check Safety Interlock System

Check function of all controls

Controls and Features

Ignition Switch

PTO Switch

Throttle Lever

Seat

Steering Levers

Parking Brake

Fuel Tanks

Headlights

Axle Lock

Mower Lift Pedal

Mower Deck

Discharge Chute

Fuel Shut-Off Valve

Choke Control

Hour meter

Operation

Safety Interlock System

Mower Lift Pedal

Adjusting Seat

Filling Fuel Tanks

Stopping in an Emergency

Moving Unit Manually

Starting and Shutting Off Engine

Starting the Engine

Stopping the 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

Remove

Install

Opening Deck Access Plate

Replacing Mower Blade

Remove

Install

Sharpening Mower Blade

Discard Mower Blade

Adjusting Anti-Scalp Roller

Highest Position

Lowest Position

Serving Battery

Battery Removal and Installation

Cleaning Battery and Battery Cables

Charging the Battery

Jump-Starting