Hydro-Gear ZY-KCEE-SL7G-11XX Hydrostatic Transaxle ZT-3400 Zero-Turn Mower Drive Unit

The Hydro-Gear ZY-KCEE-SL7G-11XX is a genuine OEM hydrostatic transaxle from the commercial-grade ZT-3400 series, engineered for zero-turn mowers and heavy-duty landscaping equipment. This integrated hydrostatic drive unit combines the hydraulic pump and motor in a single compact assembly, delivering smooth, responsive speed and directional control for demanding mowing applications.

The ZT-3400 platform is purpose-built for mid-size commercial use, featuring a high-efficiency 12cc pump and 16cc motor paired with a robust 1-1/8" axle shaft designed to handle heavier loads and challenging terrain. The unit is rated to deliver up to 500 ft-lbs of output torque and is suited for equipment up to 1,600 lbs.

Key Features:

• Genuine Hydro-Gear OEM replacement transaxle
• ZT-3400 series — commercial-grade hydrostatic drive system
• High-efficiency 12cc pump and 16cc motor integrated in one compact unit
• Heavy-duty 1-1/8" axle shaft for increased load capacity
• Shock valves to extend system service life
• Durable cut steel gears for long-term reliability
• Integrated charge pump for consistent system pressure
• All-metal internal gear construction
• Spin-on external oil filter for easy, accessible maintenance
• Large cooling fan design to maintain lower operating temperatures
• Fully oil-flooded internal components for superior lubrication
• Rated for vehicles up to 1,600 lbs and up to 500 ft-lbs output torque

This transaxle is a direct OEM replacement superseded from part number ZY-KCEE-3L7G-11XX. It is also cross-referenced with Scag OEM part number 484454. Designed to restore original drive performance, the ZY-KCEE-SL7G-11XX is the correct genuine-Hydro-Gear solution for restoring smooth, powerful drive operation in commercial zero-turn equipment.