Hydro-Gear

About Hydro-Gear

Founded in 1991 and headquartered in Sullivan, Illinois, Hydro-Gear has grown into the world's leading manufacturer of drivetrain solutions for outdoor power equipment and industrial machinery. Trusted by the biggest names in the lawn and turf industry, Hydro-Gear engineers the systems that keep zero-turn mowers, riding lawn tractors, and commercial grounds equipment moving reliably season after season.

Hydro-Gear's core expertise lies in hydrostatic drives, transaxles, and fully electric drive systems. Rather than building general-purpose components, Hydro-Gear focuses exclusively on drivetrain technology — a deliberate specialization that has allowed them to achieve a level of precision and durability that few competitors can match. Their products are engineered to transfer power efficiently from the engine to the wheels, giving operators smooth, responsive control under demanding conditions.

Hydrostatic Transmissions: The Heart of Outdoor Power Equipment

At the center of Hydro-Gear's lineup are their renowned Transmissions. These hydrostatic units use pressurized hydraulic fluid to transfer power continuously and smoothly, eliminating the need for a conventional gear-shift mechanism. The result is stepless speed control — a major advantage for mowing applications where operators constantly adjust ground speed to match terrain and grass conditions. Hydro-Gear transmissions are OEM-specified by major equipment manufacturers precisely because of their proven field reliability.

Hydraulic Pump Assemblies for Integrated Drive Systems

Hydro-Gear also produces precision Automatic Transmission Oil Pump assemblies that sit at the core of their hydrostatic drive units. These hydraulic pumps pressurize the fluid that powers the drive system, and their performance directly determines the responsiveness and efficiency of the whole drivetrain. Hydro-Gear's pump assemblies are engineered to tight tolerances, ensuring consistent flow rates and long service life even under heavy-duty cycling.

Integrated Pump Solutions for Steering and Drive

On zero-turn and larger commercial mowers, Hydro-Gear manufactures integrated pump units that support both drive and Power Steering Pump functions within the drivetrain architecture. These solutions simplify the hydraulic system layout, reduce potential leak points, and make servicing more straightforward for technicians working in the field.

Why Hydro-Gear Stands Apart

• OEM Trust: Specified as original equipment by leading mower and grounds-care manufacturers worldwide.
• Focused Expertise: Exclusively dedicated to drivetrain technology — not a generalist parts supplier.
• Durability by Design: Products engineered for continuous-duty cycles in real-world outdoor conditions.
• Electric Drive Innovation: Expanding into fully electric drive systems, keeping pace with the evolving outdoor power equipment market.
• Customer-First Philosophy: Corporate culture centered on the long-term success of the OEM partners and end users who depend on Hydro-Gear products.

Whether you are a service technician replacing a worn hydrostatic unit or an OEM engineer sourcing drivetrain components for a new platform, Hydro-Gear delivers the engineering depth and field-proven reliability to keep equipment performing at its best.