Description
Overview
The Gravely ZT HD 60 (Model #991279) is the flagship of the Heavy-Duty residential line, built specifically for those who want to "manicure" rather than just mow. Often mistaken for a full commercial machine, it features a massive 60-inch X-Factor® 3 deck fabricated from high-strength 7-gauge steel. Powered by a top-tier 24 HP Kawasaki® FR730V engine, this mower is engineered to maintain larger estates with the speed and precision of a professional contractor.
This unit sits on a fully welded tubular frame—a design typically reserved for commercial fleets—providing unmatched stability and vibration dampening. With its Hydro-Gear® ZT-3100® transaxles, you can reach forward speeds of 8 MPH, allowing you to clear nearly 5 acres per hour without sacrificing cut quality.
Top Performance Features
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24 HP Kawasaki® FR730V V-Twin: A powerhouse engine designed for consistent output, reliable starting, and the torque required for a 60-inch cutting path.
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7-Gauge Fabricated X-Factor® 3 Deck: A commercial-grade, fully-welded deck optimized for superior grass dispersion and long-term durability.
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Hydro-Gear® ZT-3100® Transaxles: Professional-grade hydrostatic transmissions that offer a smooth, responsive ride and are fully serviceable for a longer life.
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Automotive-Style Tubular Frame: Unlike C-channel frames, this fully enclosed steel tubing offers maximum structural integrity on rough or hilly terrain.
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Taller & Wider High-Back Seat: Features a 22-inch high-back design with padded armrests and seat isolation to reduce operator fatigue during long shifts.
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15-Position Height Adjustment: A foot-operated deck lift system allows you to easily toggle between 1.5" and 5" cutting heights in 1/4-inch increments.
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Oversized Turf Tires: Large 22-inch rear drive tires and 13-inch front casters provide superior traction and a smoother ride.
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High-Capacity 5.1 Gallon Fuel Tank: Designed for high-production mowing, allowing you to finish the largest properties with fewer stops.
Core Specifications
| Feature | Details |
| Engine | 24 HP Kawasaki® FR730V (726cc) |
| Transmission | Hydro-Gear® ZT-3100® (Serviceable) |
| Deck Material | 7-Gauge Fabricated Steel |
| Ground Speed | 8.0 MPH Forward / 4.0 MPH Reverse |
| Mowing Capacity | ~4.8 Acres Per Hour |
| Assembled Weight | 843 lbs. |
| Cutting Width | 60 Inches |
| Warranty | 4-Year / 500-Hour Limited Residential |
Commercial Specs, Residential Address
The ZT HD 60 is built for the lawn aficionado who demands the best. From its AGM battery for reliable cold starts to its SmartJet™ deck wash and mechanical spindles, every detail is focused on performance and longevity. It is a machine that elevates expectations, offering a commercial-level manicure for your private estate.
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