Gravely 991256 - User Manual

Questions and Answers

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sthompsonAug 14, 2025
How to troubleshoot starting issues with my Gravely 991256 Lawn Mower?
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  Patricia StephensAug 14, 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.
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Sharon GriffinAug 18, 2025
What to do if my Gravely 991256 does not drive?
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  marie31Aug 18, 2025
  If your Gravely Lawn Mower does not drive, one potential cause is that the transaxles are bypassed. If this is the case, engage the levers. It's also possible that the transaxle drive belt is faulty, or that the transaxles themselves are faulty, which would require contacting your Gravely dealer.
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Lisa RoachAug 21, 2025
Why is my Gravely 991256's cutting quality so poor?
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  Randall ParkerAug 22, 2025
  If your Gravely Lawn Mower exhibits poor cutting quality, several factors could be responsible. First, the mower blades might not be level, or the mower deck pitch could be incorrect. It's also possible that the mower blades are dull or faulty, requiring sharpening or replacement. Another factor could be mowing speed is too fast, so try driving slower when cutting grass. Also, belt tension or condition might be poor, requiring replacement of mower belts. Finally, the cutting height might be too low, so avoid setting the height of cut too low, and for very tall grass, mow twice.
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Thomas SchaeferAug 25, 2025
What to do if the PTO malfunctions on my Gravely 991256?
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  kelly01Aug 26, 2025
  If the PTO malfunctions on your Gravely Lawn Mower, it could be due to a few reasons. The operator presence switch might not be engaged; make sure to activate it by sitting on the operator seat. It's also possible that the operator presence switch itself is faulty. Another cause could be a faulty PTO belt, which would need replacement. In some cases, the PTO switch, wiring, connectors, or clutch might be faulty, which would require contacting your Gravely dealer.
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kathleen39Aug 29, 2025
Why does my Gravely 991256 Lawn Mower engine run rough?
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  john33Aug 29, 2025
  If your Gravely Lawn Mower engine runs rough, one potential cause is that the choke control knob is in the 'on' position. If this is the case, move the knob to the 'off' position. Another possibility is that the air filter cartridge is plugged, which means you should clean or replace it. In some cases, the engine itself might be faulty, requiring assistance from your Gravely dealer.
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erikajohnsonSep 1, 2025
Why is my Gravely 991256 Lawn Mower engine overheating?
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  Timothy WoodsSep 1, 2025
  If your Gravely Lawn Mower engine overheats, it could be due to a few reasons. The engine oil level might be low, requiring you to add engine oil. Another possibility is that the cooling fins are plugged, which means you should clean the engine. In some cases, the engine itself might be faulty, requiring assistance from your Gravely dealer.
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Kimberly RogersSep 5, 2025
Why does my Gravely 991256 Lawn Mower move when off and the parking brake is on?
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  Michaela FigueroaSep 5, 2025
  If your Gravely Lawn Mower moves with the engine off and the parking brake engaged, it could be that the parking brake needs adjustment. You can adjust the parking brake lever. It's also possible that the parking brake itself is faulty, which would require contacting your Gravely dealer.
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Andrew BrownSep 9, 2025
Why doesn't my Gravely Lawn Mower drive straight?
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  Robert TurnerSep 9, 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.

Summary

SAFETY

GENERAL SAFETY PRACTICES

Follow safe working precautions, laws, and receive operator training for safe use.

SAFETY DECALS AND INSTRUCTIONS

Explains safety decals, their locations, meanings, and related safety instructions for operation and service.

ASSEMBLY

CONTROLS AND FEATURES

ENGINE START AND SPEED CONTROLS

OPERATIONAL AND TRANSPORT CONTROLS

OPERATOR COMFORT AND SAFETY SYSTEMS

OPERATION

EMERGENCY STOPPING AND STARTUP

Procedures for stopping, pre-operation checks, ROPS positioning, and starting the engine.

UNIT OPERATION AND MOVEMENT

Instructions for operating the unit, stopping the engine, and moving the unit manually.

MAINTENANCE

MAINTENANCE SCHEDULE AND PARTS

Outlines the recommended maintenance tasks and lists available service parts for the unit.

SERVICE PREPARATION AND CHECKS

LUBRICATION, CLEANING, AND COMPONENT SERVICING

HYDRAULIC SYSTEM SERVICE

Detailed steps for changing hydraulic oil, filter, and purging the system.

ADJUSTMENTS

STEERING LEVER ADJUSTMENTS

UNIT TRACKING ADJUSTMENT