52250 – Hydro-Gear Charge Pump O-Ring -137 (.103 Cross Section) (Genuine OEM Part) The Hydro-Gear 52250 O-Ring – Charge Pump -137 (.103 Cross Section) is a genuine OEM hydraulic sealing component designed specifically for Hydro-Gear hydrostatic transmission charge pump assemblies. This precision O-ring provides a secure, leak-free seal within the charge pump system, maintaining proper hydraulic pressure and ensuring consistent transmission performance. Manufactured to Hydro-Gear’s strict OEM specifications, the 52250 O-ring is built from high-quality oil-resistant elastomer material capable of withstanding hydraulic fluid exposure, operating pressure, and elevated temperatures. Using a genuine Hydro-Gear O-ring ensures correct dimensional fit, proper sealing performance, and long-term reliability within the hydrostatic system. Key Details: Manufacturer: Hydro-Gear Part Number: 52250 Part Type: Charge Pump O-Ring Size: Dash -137 Cross Section: .103 Inch Function: Seals charge pump components to prevent hydraulic fluid leakage Material: Oil-resistant elastomer compound Installation: Direct OEM replacement Compatibility: The Hydro-Gear 52250 Charge Pump O-Ring (-137) is used in select Hydro-Gear hydrostatic pump and transaxle systems equipped with serviceable charge pump assemblies, including: ZT-2800 Series ZT-3100 Series ZT-3400 Series ZT-3600 Series ZT-5400 Series These Hydro-Gear transmission systems are widely installed in commercial and heavy-duty zero-turn mowers manufactured by brands such as: Ariens Gravely Scag Toro Exmark Hustler Bad Boy The genuine Hydro-Gear 52250 O-ring is essential for maintaining hydraulic system integrity, preventing fluid leaks, and ensuring dependable charge pump performance in Hydro-Gear hydrostatic drive systems.
