Gravely ZT HD 44 User Manual (English)

Other manuals for Gravely ZT HD 44

Manual82 pages

Owner's/Operator's Manual40 pages

Questions and Answers:

J
joe38Aug 22, 2025
Why won't my Gravely Lawn Mower engine start?
- M
  mejianancyAug 23, 2025
  If your Gravely Lawn Mower engine isn't starting, several factors could be at play. It could be due to an unengaged or faulty Safety Interlock System, an empty fuel tank, contaminated fuel supply, or a discharged battery. Also, check for poor connections between the battery and its cables. Loose spark plug wires or faulty spark plugs could also be the reason. In the first instance, check the Safety Interlock System. If the fuel tank is empty, refill it. If the fuel supply is contaminated, replace it with clean fuel. If the battery is discharged, charge it. If the connection between the battery and battery cables is poor, tighten and/or clean the battery and battery cables. If the spark plug wires are loose, connect them or replace the spark plugs.
Y
Yolanda MeyerSep 2, 2025
What causes PTO malfunctions in Gravely Lawn Mowers?
- J
  Jared WilliamsSep 2, 2025
  If the PTO is malfunctioning on your Gravely Lawn Mower, it could be because the operator presence switch is not engaged or the PTO belt is faulty. Activate the switch by sitting on the operator seat. Replace the deck drive belt.
M
Mary StoneSep 1, 2025
Why does my Gravely Lawn Mower not drive straight?
- M
  Maria MedinaSep 1, 2025
  If your Gravely Lawn Mower isn't driving straight, incorrect tire pressure or steering levers that need adjustment could be the cause. Check the tire pressure. See about adjusting the steering levers.
W
wisepeterAug 30, 2025
Why is my Gravely ZT HD 44 Lawn Mower engine running rough?
- J
  jordanaustinAug 31, 2025
  If your Gravely Lawn Mower engine is running rough, it might be because the choke control knob is in the on position or the air filter cartridge is plugged. Move the knob to the off position. Clean or replace the air filter cartridge.
M
mark28Aug 29, 2025
What to do if my Gravely Lawn Mower engine overheats?
- C
  Connor HarmonAug 29, 2025
  If your Gravely Lawn Mower engine is overheating, it could be due to a low engine oil level or plugged cooling fins. Add engine oil, and clean the engine.
R
Robin JonesAug 28, 2025
How to fix a Gravely ZT HD 44 that does not drive straight?
- J
  Jonathan PerryAug 28, 2025
  If your Gravely Lawn Mower does not drive straight, it could be due to incorrect tire pressure, so check the tire pressure. Also, the steering levers may need adjustment.
W
willisdominiqueAug 27, 2025
What to do if my Gravely Lawn Mower won't drive?
- A
  adamdavisAug 27, 2025
  If your Gravely Lawn Mower does not drive, make sure that the transaxles are engaged by their levers. If the levers are engaged, but the unit still doesn't drive, the transaxle drive belt may be faulty, or the transaxles themselves may be faulty, in which case you should contact your Gravely dealer.
L
Larry MooreAug 27, 2025
How to troubleshoot starting issues with my Gravely ZT HD 44?
- J
  James CareyAug 27, 2025
  If your Gravely Lawn Mower engine doesn't start, there are several potential causes. First, the safety interlock system might not be engaged or could be faulty. Also, the fuel tank could be empty, or the fuel supply might be contaminated, requiring replacement with clean fuel. The battery could be discharged, needing a charge. A loose connection between the battery and cables can also prevent starting, so ensure they are tightened and clean. Spark plug wires might be loose, or the spark plugs themselves could be faulty, requiring connection or replacement. In some cases, the electrical system or the engine itself might be faulty, in which case you should contact your Gravely dealer.
A
alexander46Aug 25, 2025
What to do if my Gravely ZT HD 44 does not drive?
- S
  soconnellAug 26, 2025
  If your Gravely Lawn Mower isn't driving, the transaxles may be bypassed. Engage the levers.
D
dudleymikeAug 25, 2025
How to improve the cutting quality of my Gravely Lawn Mower?
- S
  Sara JacksonAug 25, 2025
  If you notice poor cutting quality with your Gravely Lawn Mower, several factors could be the reason. The mower blades might not be level, or the mower deck pitch could be incorrect. The mower blades could be dull or faulty. The mowing speed could be too fast, or the belt tension or condition might be poor. Also, the cutting height might be too low. Level and adjust the pitch of the mower deck. Sharpen or replace the mower blades. Drive slower when cutting grass. Replace the mower belts. Avoid setting the cutting height too low; for very tall grass, mow twice.

Gravely ZT HD 44 Specifications

General

Engine Brand	Kawasaki
Cutting Width	44 inches
Deck Material	10-gauge steel
Engine Size	726 cc
Cutting Height	1.5 - 4.5 inches
Spindle Material	Aluminum
Seat	High Back
Ground Speed Forward	8 mph
Ground Speed Reverse	4 mph

Summary

SAFETY FUNDAMENTALS

GENERAL SAFETY RULES

Essential safety practices, symbols, and signal words.

SAFETY DECALS

DECAL LOCATIONS

DANGER! SAFETY WARNINGS

DISCHARGE HAZARD WARNINGS

Warnings about directed discharge and thrown objects.

AMPUTATION HAZARD WARNINGS

Warnings about rotating blades and pinch points.

SPECIFIC HAZARD WARNINGS

TIPPING, TRACTION, SERVICE, BYSTANDER HAZARDS

HOT PARTS AND ROTATING PARTS

Warnings about hot components and staying clear of rotating parts.

GENERAL DANGER WARNING

General danger warning about hands and feet.

SAFETY RULES AND GUIDELINES

FUEL AND SMOKING SAFETY

Safety warnings related to fuel, smoking, and filling the tank.

MOVING BELT SAFETY

Amputation hazard warning regarding moving belts.

OPERATOR SAFETY

CHILDREN SAFETY

Warnings about children attracted to the machine and their proximity.

OPERATION SAFETY

GENERAL OPERATION SAFETY

SLOPE OPERATION SAFETY

Critical safety guidelines for operating on slopes to prevent tip-overs.

OPERATING CONDITIONS AND FUEL

SLOPE OPERATION AND FUEL SAFETY

Advice for slopes and precautions for handling gasoline, fuel blends, and storage.

ASSEMBLY PROCEDURES

STEERING LEVER AND TIRE SAFETY

ASSEMBLY CONTINUED

CONTROLS AND FEATURES

COMPONENT IDENTIFICATION

ENGINE CONTROLS OPERATION

PTO KNOB AND HOUR METER

OPERATOR CONTROLS

PARKING BRAKE AND SAFETY INTERLOCK

Controls for parking brake and monitoring by the safety interlock system.

STEERING AND TRANSAXLE CONTROLS

OPERATION GUIDELINES

ANTI-SCALP ROLLERS AND EMERGENCY STOPPING

Preventing scalping and procedure for emergency stopping.

PRE-OPERATION AND ENGINE STARTING

Essential pre-operation checks and step-by-step engine starting instructions.

UNIT OPERATION

PARKING BRAKE AND DIRECTIONAL CONTROL

MOWING BEST PRACTICES AND ENGINE STOPPING

Tips for optimal mowing and procedure for stopping the engine safely.

MAINTENANCE INTRODUCTION

MAINTENANCE SCHEDULE

SERVICE PARTS AND SCHEDULE

MAINTENANCE SCHEDULE DETAILS

Recommended service intervals for various maintenance tasks.

HOUR METER AND SYSTEM CHECKS

SAFETY INTERLOCK, BRAKE, OIL, TIRE CHECKS

Checks for safety interlock, parking brake, engine oil, and tire pressure.

BLADE SERVICE PROCEDURES

BLADE REMOVAL AND SHARPENING

BATTERY SERVICE PROCEDURES

HYDRAULIC SYSTEM CHECK

HYDRAULIC SYSTEM MAINTENANCE

CHANGE HYDRAULIC OIL AND FILTER

HYDRAULIC SYSTEM PURGING

PURGE HYDRAULIC SYSTEM

How to remove air from the hydraulic system after maintenance.

SERVICE AND ADJUSTMENTS

ADJUST STEERING LEVERS HEIGHT

Adjusting the height of the steering levers for operator comfort.

DRIVE STRAIGHT ADJUSTMENTS

TRANSAXLE ADJUSTMENTS

CHECK FOR EXCESSIVE CREEP

Procedure for checking and adjusting the transaxles for creep.

TRANSAXLE NEUTRAL POSITION

ADJUST NEUTRAL POSITION

Steps to adjust the transaxle neutral position for wheel hub rotation.

MOWER BELT REPLACEMENT

MOWER DRIVE BELT SERVICE

TRANSAXLE DRIVE BELT SERVICE

MOWER DECK INSTALLATION

INSTALL MOWER DECK

Procedures for positioning and securing the mower deck under the unit.

LEVEL AND PITCH MOWER DECK

CHECK BLADE LEVEL AND PITCH

How to check if the mower deck blades are level and pitched correctly.

LEVEL MOWER DECK

Adjusting the mower deck to ensure it is level side-to-side.

ADJUST BLADE PITCH

INCREASE FORWARD PITCH

Adjusting the deck to pitch the front lower than the rear.

DECREASE FORWARD PITCH

TROUBLESHOOTING ENGINE ISSUES

ENGINE DOES NOT START

Common causes and corrections for engine start failures.

ENGINE RUNS ROUGH

Probable causes and solutions for rough engine operation.

ENGINE OVERHEATS

Troubleshooting steps for an overheating engine.

TROUBLESHOOTING DRIVE ISSUES

UNIT DOES NOT DRIVE

Diagnosing and fixing issues where the unit fails to drive.

PTO MALFUNCTIONS

Addressing problems related to the Power Take-Off (PTO) system.

UNIT MOVES WITH ENGINE OFF

UNIT DOES NOT DRIVE STRAIGHT

Correcting steering issues causing the unit to drift.

UNIT CREEPS IN NEUTRAL

Diagnosing and fixing unit creep when levers are neutral.

TROUBLESHOOTING QUALITY ISSUES

POOR CUTTING QUALITY

Identifying causes for poor cut quality and solutions.

BLADES DO NOT STOP

Troubleshooting why mower blades fail to stop promptly.

SPECIFICATIONS (MODELS 48, 52, 60)

MODEL 991152, 991154, 991156 SPECS

SPECIFICATIONS (MODELS 44, 48, 52, 60)

MODEL 991160, 991162, 991164, 991166 SPECS

SPECIFICATIONS (CARB MODELS)

MODEL 991180, 991182, 991184, 991186 SPECS

CONSUMER WARRANTY

WARRANTY SERVICE AND EXCLUSIONS

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Table of Contents

Other manuals for Gravely ZT HD 44

Questions and Answers:

Gravely ZT HD 44 Specifications

Summary

SAFETY FUNDAMENTALS

GENERAL SAFETY RULES

SAFETY DECALS

DECAL LOCATIONS

DANGER! SAFETY WARNINGS

DISCHARGE HAZARD WARNINGS

AMPUTATION HAZARD WARNINGS

SPECIFIC HAZARD WARNINGS

TIPPING, TRACTION, SERVICE, BYSTANDER HAZARDS

HOT PARTS AND ROTATING PARTS

GENERAL DANGER WARNING

SAFETY RULES AND GUIDELINES

FUEL AND SMOKING SAFETY

MOVING BELT SAFETY

OPERATOR SAFETY

CHILDREN SAFETY

OPERATION SAFETY

GENERAL OPERATION SAFETY

SLOPE OPERATION SAFETY

OPERATING CONDITIONS AND FUEL

SLOPE OPERATION AND FUEL SAFETY

ASSEMBLY PROCEDURES

STEERING LEVER AND TIRE SAFETY

ASSEMBLY CONTINUED

CONTROLS AND FEATURES

COMPONENT IDENTIFICATION

ENGINE CONTROLS OPERATION

PTO KNOB AND HOUR METER

OPERATOR CONTROLS

PARKING BRAKE AND SAFETY INTERLOCK

STEERING AND TRANSAXLE CONTROLS

OPERATION GUIDELINES

ANTI-SCALP ROLLERS AND EMERGENCY STOPPING

PRE-OPERATION AND ENGINE STARTING

UNIT OPERATION

PARKING BRAKE AND DIRECTIONAL CONTROL

MOWING BEST PRACTICES AND ENGINE STOPPING

MAINTENANCE INTRODUCTION

MAINTENANCE SCHEDULE

SERVICE PARTS AND SCHEDULE

MAINTENANCE SCHEDULE DETAILS

HOUR METER AND SYSTEM CHECKS

SAFETY INTERLOCK, BRAKE, OIL, TIRE CHECKS

BLADE SERVICE PROCEDURES

BLADE REMOVAL AND SHARPENING

BATTERY SERVICE PROCEDURES

HYDRAULIC SYSTEM CHECK

HYDRAULIC SYSTEM MAINTENANCE

CHANGE HYDRAULIC OIL AND FILTER

HYDRAULIC SYSTEM PURGING

PURGE HYDRAULIC SYSTEM

SERVICE AND ADJUSTMENTS

ADJUST STEERING LEVERS HEIGHT

DRIVE STRAIGHT ADJUSTMENTS

TRANSAXLE ADJUSTMENTS

CHECK FOR EXCESSIVE CREEP

TRANSAXLE NEUTRAL POSITION

ADJUST NEUTRAL POSITION

MOWER BELT REPLACEMENT

MOWER DRIVE BELT SERVICE

TRANSAXLE DRIVE BELT SERVICE

MOWER DECK INSTALLATION

INSTALL MOWER DECK

LEVEL AND PITCH MOWER DECK

CHECK BLADE LEVEL AND PITCH

LEVEL MOWER DECK

ADJUST BLADE PITCH

INCREASE FORWARD PITCH

DECREASE FORWARD PITCH

TROUBLESHOOTING ENGINE ISSUES

ENGINE DOES NOT START

ENGINE RUNS ROUGH

ENGINE OVERHEATS

TROUBLESHOOTING DRIVE ISSUES