70921 – Hydro-Gear Breather Cap & Vent Kit (Genuine OEM Hydro-Gear Part) The Hydro-Gear 70921 Breather Cap and Vent Kit is a genuine OEM service component designed to maintain proper ventilation and sealing in Hydro-Gear transmission and hydraulic reservoir systems. This kit includes a large breather cap with integrated vent, which is essential for regulating internal pressure and protecting the hydraulic system from contamination. Engineered by Hydro-Gear, this breather cap allows controlled airflow into the transmission or reservoir while preventing dirt, debris, and moisture from entering the system. Proper venting is critical to ensure smooth hydraulic operation, prevent pressure buildup, and maintain consistent fluid performance in hydrostatic drive systems. Manufactured from high-quality, durable materials, the 70921 kit is built to withstand exposure to hydraulic fluids, temperature changes, and demanding operating conditions commonly found in commercial and residential equipment. Key Details: Manufacturer: Hydro-GearPart Number: 70921Product Name: Breather Cap & Vent KitPart Type: Hydraulic reservoir/transmission vented capFunction: Regulates internal pressure and prevents contaminationDesign: Integrated breather vent for controlled airflowMaterial: High-strength plastic with internal vent componentsApplication: Hydrostatic transmissions and hydraulic reservoirsInstallation: Direct OEM replacement for Hydro-Gear systems Compatibility: The Hydro-Gear 70921 Breather Cap & Vent Kit is designed for use in: Hydro-Gear hydrostatic transmissions and transaxlesHydraulic reservoir systems in zero-turn mowersCommercial and residential lawn equipment equipped with Hydro-Gear drives Commonly found in equipment from brands such as: ScagGravely / AriensExmarkToroHustler As a genuine Hydro-Gear OEM component, the 70921 breather cap and vent kit ensures proper system ventilation, protects against contamination, and supports long-term reliability and performance of hydrostatic transmission systems.
