51455 – Hydro-Gear Valve Plate (16A) (Genuine OEM Part) The Hydro-Gear 51455 Valve Plate (16A) is a genuine OEM internal hydraulic component engineered for precise fluid control within Hydro-Gear hydrostatic pumps and transaxles. This precision-machined valve plate regulates hydraulic oil flow between the pump cylinder block and motor assembly, ensuring smooth directional control, consistent drive power, and optimal transmission efficiency. Manufactured to Hydro-Gear’s exact OEM tolerances, the 51455 valve plate provides accurate port timing and sealing surfaces critical for maintaining hydraulic pressure and long-term transmission durability. Using a genuine Hydro-Gear valve plate ensures correct fitment, proper oil channel alignment, and reliable operation in demanding commercial mowing applications. Key Details: Manufacturer: Hydro-Gear Part Number: 51455 Part Type: Valve Plate (16A Specification) Function: Controls hydraulic oil distribution within hydrostatic pump assembly Material: Precision-machined hardened steel Installation: Direct OEM internal replacement component Compatibility: The Hydro-Gear 51455 Valve Plate (16A) is used in select Hydro-Gear hydrostatic transmission systems commonly installed in commercial and heavy-duty zero-turn mowers. Typically found in certain Hydro-Gear pump and transaxle series, including: ZT-2800 Series ZT-3100 Series ZT-3400 Series ZT-3600 Series These Hydro-Gear transmission systems are widely used in professional outdoor power equipment manufactured by brands such as: Scag Ariens Gravely Hustler Exmark Toro Bad Boy The genuine Hydro-Gear 51455 valve plate plays a critical role in maintaining smooth hydrostatic drive response, consistent torque output, and long service life of Hydro-Gear transmission systems in commercial turf equipment.
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