Upgrade or repair your zero-turn mower with this high-performance, genuine OEM. The ZT-2800 series is the industry standard for smooth, reliable hydrostatic power in residential and light commercial equipment. Fully integrated hydrostatic drive for buttery-smooth operation. Features a 1-inch axle and robust internal components designed for long-term reliability. Easy oil and filter changes ensure a long service life. Guaranteed exact fit and performance as a genuine Hydro-Gear part. Exmark (Quest & Lazer Z Series). Residential units using the ZT-2800 platform. (Raptor & Fastrak Series). Bad Boy Mowers (ZT & Maverick Series). Bad Boy ZT Elite. Ariens / Gravely (ZT & ZT HD Series). 00647000 (Consult specific chassis serial number). Cub Cadet (Ultima & RZT Series). Models requiring a 4-lug hub mount.