Gravely ZT HD 25in 25HP Kohler Zero Turn Mower – Heavy Duty

The Gravely ZT HD 25in 25HP Kohler zero turn mower delivers heavy-duty commercial transaxles and high combustion torque in a compact chassis envelope. Property owners managing rugged acreage face constant equipment failure when light residential mowers flex over rough terrain or bog down under heavy grass loads. This heavy-duty machine combines a welded 10-gauge fabricated steel deck with commercial Hydro-Gear ZT-3100 transaxles and a 25HP Kohler 7000 Series V-twin engine built to maintain full cutting speed.

Dual Hydro-Gear ZT-3100 transaxles incorporate external spin-on oil filters and steel cut gears, driving wide rear tires at forward speeds up to 8 MPH. The heavy welded 1.5-inch by 3-inch steel tube chassis resists torsional twist when crossing drainage ditches, keeping the cutting deck level for a scalp-free turf cut. A spring-assisted foot deck lift allows operators to raise the deck effortlessly when clearing road curbs and gravel driveways.

Engine Architecture of Gravely ZT HD 25in 25HP Kohler

- Welded 10-Gauge Fabricated Steel Deck: Built with heavy plate steel to withstand impacts from hidden tree roots and rocks.
- 25HP Kohler 7000 Series V-Twin Engine: Delivers massive combustion torque to power cutting blades through dense spring grass.
- Hydro-Gear ZT-3100 Commercial Drives: Serviceable transaxles feature spin-on filters and 1-inch axle shafts for long durability.
- Foot-Assisted Deck Height Selector: Adjusts cut heights across 15 distinct positions from 1.5 to 5 inches with an easy-select pin.
- Upgraded High-Back Suspension Seat: Features padded armrests and lumbar contouring to dampen rough terrain vibrations.
- Constant Belt Tensioning System: Self-adjusting idler arm maintains correct deck belt tension to eliminate manual adjustment downtime.

Commercial Utility Stamina & Lifespan

Built for demanding estate properties and heavy mowing, this commercial-leaning zero-turn mower provides rugged durability and serviceable hydraulic drives.

- Serviceable Hydro-Gear ZT-3100 transaxles feature spin-on filters that simplify fluid changes, extending transmission operating life.
- A heavy welded 10-gauge deck handles continuous mowing on multi-acre properties without cracking deck weld seams.

Chassis Integration & Industrial Fitment

Weighing 750 pounds dry, this heavy-duty machine clears property acreage rapidly while securing safely on standard utility trailers.

Commercial Warranty & Field Maintenance

- Gravely backs this ZT HD mower with a 4-Year or 400-hour limited warranty covering the chassis, transaxles, and fabricated cutting deck.

Change oil after the initial 20 operating hours, then maintain 100-hour service intervals using 10W-30 oil and a new filter. Tap clean the air filter element weekly on dusty jobsites, and check the spark plug gap at 0.030 inches. Order the Gravely ZT HD 25in 25HP Kohler zero turn mower from Mulmotor.com for guaranteed factory-fresh units, complete manufacturer warranty coverage, and dedicated commercial equipment support.