Gravely ZT HD 48 User Manual

Gravely ZT HD 48

48 pages

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Operator’s Manual

Manuel de I’utilisateur

ZT HD

05075300C • 6/17

Printed in USA

Models

991152 – ZT HD 48

(SN 000101 +)

991154 – ZT HD 52

(SN 000101 +)

991156 – ZT HD 60

(SN 000101 +)

991160 – ZT HD 44

(SN 000101 +)

991162 – ZT HD 48

(SN 000101 +)

991164 – ZT HD 52

(SN 000101 +)

991166 – ZT HD 60

(SN 000101 +)

991180 – ZT HD 44 CARB

(SN 000101 +)

991182 – ZT HD 48 CARB

(SN 000101 +)

991184 – ZT HD 52 CARB

(SN 000101 +)

991186 – ZT HD 60 CARB

(SN 000101 +)

™

E10

ENGLISH

FRANÇAIS

Table of Contents

Other manuals for Gravely ZT HD 48

Owner's/Operator's Manual40 pages

Questions and Answers:

C
Charles CastilloAug 22, 2025
Why won't my Gravely ZT HD 48 Lawn Mower engine start?
- J
  jamie31Aug 22, 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.
J
john32Sep 2, 2025
What causes PTO malfunctions in Gravely Lawn Mowers?
- B
  brandy19Sep 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.
J
Jason FloydSep 1, 2025
Why does my Gravely ZT HD 48 not drive straight?
- M
  Mark MooreSep 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.
F
Francisco GarciaAug 31, 2025
Why is my Gravely Lawn Mower engine running rough?
- F
  fowensAug 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.
K
Kimberly HowardAug 29, 2025
What to do if my Gravely ZT HD 48 Lawn Mower engine overheats?
- H
  hollyjohnstonAug 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.
H
Holly BakerAug 28, 2025
How to fix a Gravely ZT HD 48 that does not drive straight?
- M
  melissa48Aug 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.
C
Cynthia JenningsAug 27, 2025
What to do if my Gravely ZT HD 48 won't drive?
- S
  Stephen OchoaAug 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.
R
Richard PittsAug 27, 2025
How to troubleshoot starting issues with my Gravely ZT HD 48 Lawn Mower?
- C
  Caitlyn StewartAug 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.
W
Warren RobertsonAug 25, 2025
What to do if my Gravely Lawn Mower does not drive?
- M
  michaelsmithAug 26, 2025
  If your Gravely Lawn Mower isn't driving, the transaxles may be bypassed. Engage the levers.
C
Christopher RogersAug 25, 2025
How to improve the cutting quality of my Gravely Lawn Mower?
- T
  Terry DavisAug 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 48 Specifications

General

Engine Brand	Kawasaki
Engine Model	FR691V
Horsepower	23 HP
Cutting Width	48 inches
Transmission Type	Hydro-Gear ZT-3100
Deck Material	10-gauge steel
Engine Type	V-Twin
Engine Displacement	726cc
Ground Speed Forward	8.5 mph
Ground Speed Reverse	4 mph
Deck Type	Fabricated
Turning Radius	Zero-turn
Cutting Height	1.5 to 5 inches
Spindle Material	Aluminum
Warranty	4 years or 500 hours
Seat Type	High-back

Summary

SAFETY

Safety Alert Symbol and Signal Words

Explains the meaning and use of the safety alert symbol and defines signal words.

SAFETY DECALS

Safety Decal Locations

Illustrates the location of various safety decals on the machine.

SAFETY DECAL DESCRIPTIONS

DANGER Hazard Details

Details specific DANGER hazards and safety instructions.

Tipping, Service, Bystander, and Traction Hazards

Explains tipping, service, bystander, and loss of traction hazards.

SAFETY RULES

Training and Operator Age Guidelines

Emphasizes training, understanding controls, and operator age considerations.

Child Safety and Personal Protection

Outlines safety precautions for children and personal protective gear.

Pre-Operation and General Operation Safety

Covers pre-operation checks and safe operating practices.

OPERATION SAFETY

Slope Operation Safety

Provides guidelines for safe operation on slopes.

OPERATION PROCEDURES

Emergency Stopping and Pre-Operation Checks

Covers emergency stopping and essential pre-operation checks.

Starting the Engine

Step-by-step guide to starting the engine.

Operating the Unit and Mowing Tips

Instructions for operating the unit and tips for best mowing results.

Stopping the Engine Safely

Procedures for safely shutting down the engine.

MAINTENANCE AND SERVICE PREP

BLADE MAINTENANCE

Blade Removal, Sharpening, and Installation

Instructions for removing, sharpening, and installing mower blades.

DECK ADJUSTMENTS AND SERVICE

MOWER DECK LEVELING AND PITCH

Checking Blade Level and Pitch

Procedures to check blade level and pitch.

Leveling the Mower Deck

Instructions for leveling the mower deck.

Adjusting Blade Pitch

How to adjust the pitch of the mower deck blades.

TROUBLESHOOTING

Engine and Drive System Troubleshooting

Troubleshoots engine start, running, drive, and PTO issues.

Steering and Creep Troubleshooting

Addresses unit drive alignment and creeping problems.

Cutting Quality and Blade Stopping Troubleshooting

Identifies causes for poor cut quality and blade stopping problems.

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