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Gravely ZT HD 60 - User Manual

Gravely ZT HD 60
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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

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Questions and Answers

  • J
    Jessica JordanSep 23, 2025
    What to do if blades do not stop within 5 seconds on Gravely ZT HD 60 Lawn Mower?
    • J
      John WashingtonSep 23, 2025
      If the blades on your Gravely Lawn Mower do not stop within 5 seconds, it indicates that the clutch brake plates are worn. Try reversing the clutch brake plates. If they have already been reversed, replace the clutch.
  • A
    Amanda BautistaAug 25, 2025
    How to improve the cutting quality of my Gravely ZT HD 60?
    • M
      Madeline CunninghamAug 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.
  • M
    Michael BenitezAug 25, 2025
    What to do if my Gravely Lawn Mower does not drive?
    • N
      Nancy Rodriguez MDAug 26, 2025
      If your Gravely Lawn Mower isn't driving, the transaxles may be bypassed. Engage the levers.
  • K
    Kathleen HernandezAug 27, 2025
    How to troubleshoot starting issues with my Gravely ZT HD 60?
    • J
      joneskyleAug 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
    annamorganAug 27, 2025
    What to do if my Gravely ZT HD 60 Lawn Mower won't drive?
    • K
      Kimberly MccoyAug 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.
  • C
    Colleen RogersSep 13, 2025
    Why is the cutting quality poor on my Gravely Lawn Mower?
    • L
      lawrencejeffreySep 13, 2025
      If your Gravely Lawn Mower exhibits poor cutting quality, several factors could be responsible. Ensure the mower blades are level and the mower deck pitch is correct. Dull or faulty mower blades can also cause this issue, so sharpen or replace them. If you're mowing too fast, try slowing down. Poor belt tension or condition can also affect cutting quality, so replace the mower belts if needed. Avoid setting the cutting height too low; for very tall grass, consider mowing twice.
  • M
    martinbradleySep 12, 2025
    How to troubleshoot a Gravely ZT HD 60 when the engine does not start?
    • A
      Anita KelleySep 12, 2025
      If your Gravely Lawn Mower engine doesn't start, several factors could be the cause. First, make sure the Safety Interlock System is properly engaged and not faulty. If the fuel tank is empty, refill it. Contaminated fuel can also prevent starting, so replace it with clean fuel. A discharged battery will also prevent the engine from starting, so charge the battery. Also, check the connection between the battery and cables, and tighten or clean them if necessary. Loose spark plug wires or faulty spark plugs can also be the problem; connect the wires or replace the spark plugs. If these steps don't resolve the issue, there may be a fault in the electrical system or the engine itself, in which case you should contact your Gravely dealer.
  • H
    hamiltonjessicaSep 12, 2025
    Why doesn't my Gravely ZT HD 60 drive straight?
    • L
      lucasmatthewSep 12, 2025
      If your Gravely Lawn Mower does not drive straight, it could be due to incorrect tire pressure, so check the tire pressure. Another possible cause is that the steering levers need adjustment.
  • M
    Mary DavisSep 4, 2025
    What to do if Gravely ZT HD 60 Lawn Mower blades do not stop within 5 seconds?
    • L
      Lisa PattonSep 4, 2025
      If the blades of your Gravely Lawn Mower do not stop within 5 seconds, it could be due to worn clutch brake plates. Reverse the clutch brake plates. If the clutch brake plates have already been reversed, replace the clutch.
  • K
    Kimberly MillerSep 2, 2025
    What causes PTO malfunctions in Gravely Lawn Mowers?
    • T
      timothy92Sep 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.

Summary

SAFETY

SAFETY RULES

Follow safety instructions based on ANSI/ISO standards. Read and understand manuals before starting operations.

CHILDREN SAFETY

Exercise extreme caution with children. Never assume their location; turn off machine if a child enters the area.

BEFORE OPERATING

Check unit condition, maintenance schedule, safety interlock system, and parking brake before starting.

SLOPE OPERATION

Exercise caution on slopes. Do not operate over 15°. Mow up/down, not across. Keep machine in gear when going downhill.

FUEL HANDLING

Handle gasoline with extreme care. Use approved containers, no smoking, no sparks, no flames, and never overfill.

CONTROLS AND FEATURES

OPERATION

EMERGENCY STOPPING

Procedure for stopping the unit immediately: neutral levers, parking brake, PTO off, ignition off.

BEFORE OPERATING UNIT

Check fuel, oil, air cleaner, safety interlock system, and set cutting height before starting.

OPERATE UNIT

Release parking brake, set throttle, engage PTO, move steering levers to begin mowing.

STOP THE ENGINE

Procedure to stop the engine: neutral levers, parking brake, PTO off, slow throttle, ignition off.

MAINTENANCE

SERVICE POSITION

Park on a flat surface, stop engine, chock wheels, engage parking brake, and rotate seat forward.

MAINTENANCE SCHEDULE

Schedule of service tasks based on usage hours: check systems, clean, lubricate, replace filters and parts.

METERS AND CHECKS

Includes Hour/Maintenance Meter, Safety Interlock System check, Parking Brake check, Engine Oil check, and Tire Pressure check.

CHECK MOWER BLADES

Check blades for wear. Replace or sharpen as needed. Use caution and protective gloves.

SHARPEN BLADES

File or grind an equal amount from each cutting edge. Do not change edge angle. Balance blades before reinstalling.

HYDRAULIC SYSTEM MAINTENANCE

Includes checking hydraulic oil level and performing oil/filter changes.

CHANGE HYDRAULIC OIL AND FILTER

Warm oil, drain, replace filter, refill oil, and purge the system to remove air.

PURGE HYDRAULIC SYSTEM

Operate engine and move steering levers to remove air from the hydraulic system.

SERVICE & ADJUSTMENTS

ADJUST LIMITER BOLTS

Adjust limiter bolts to increase/decrease drive wheel speeds. Loosen jam nut, turn bolt, tighten jam nut.

ADJUST UNIT TO DRIVE STRAIGHT

Check tire pressures. Adjust to recommended pressures. Increase pressure on side unit moves toward.

ADJUST TRANSAXLES

Operate engine, check hubs for rotation. Adjust neutral position if excessive rotation occurs.

ELECTRICAL SERVICE

REPLACE MOWER BELTS

REPLACE TRANSAXLE DRIVE BELT

ADJUST PARKING BRAKE LEVER

REMOVE AND INSTALL MOWER DECK

LEVEL AND PITCH MOWER DECK

Adjust Blade Pitch

TROUBLESHOOTING

STARTING AND RUNNING ISSUES

Covers engine not starting, running rough, or overheating. Check fuel, battery, air filter, oil, and engine.

POOR CUTTING QUALITY

Diagnose poor cut quality by checking blade level/pitch, sharpness, speed, belt tension, and cutting height.

BLADES DO NOT STOP WITHIN 5 SECONDS

Check clutch brake plates for wear. Reverse or replace clutch if necessary.

STORAGE

SPECIFICATIONS

Gravely ZT HD 60 Specifications

General IconGeneral
Engine BrandKawasaki
Engine ModelFR730V
Horsepower24 HP
Engine Displacement726 cc
Cutting Width60 inches
Transmission TypeHydro-Gear ZT-3100
Blade Tip Speed18, 000 fpm
Ground Speed Reverse4 mph
Turning RadiusZero-turn
Seat TypeHigh Back with Armrests
Cutting Height1.5 - 5 inches
Warranty4 years or 500 hours

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