Hitachi ZAX870-3 Swing Motor

This swing motor assembly is a heavy-duty hydraulic drive component custom-engineered for the Hitachi ZX870-3 large excavator. It highly integrates high-pressure axial piston technology, a relief valve manifold, and a mechanical safety brake, designed to deliver precise and powerful swing torque for 80-ton class machinery. **Exceptional Torque and Smooth Response:** The internal valve plate and cylinder block feature optimized flow channels that enable rapid system pressure buildup. This delivers superior high-torque output at low speeds, ensuring swift and smooth rotation even with a fully loaded bucket. **Shock-Resistant Valve Technology:** A high-precision swing relief valve (safety valve) is integrated into the motor head. It effectively absorbs hydraulic shocks (water hammer effects) generated during rapid starts and stops of the upper structure, thereby protecting the machine's hydraulic pumps and piping. **Superior Wear-Resistant Materials:** Core components—including pistons, slippers, and the cylinder block—utilize specialized wear-resistant alloys and precision grinding processes. This ensures minimal internal leakage even during prolonged operation under high-temperature and high-pressure conditions. **OEM Standard Compatibility:** The output spline and mounting flange interface strictly adhere to Hitachi OEM specifications, allowing for seamless integration with existing swing reduction gears (gearboxes). **Guangzhou Jianming Machinery Equipment Co., Ltd.** With 20 years of solid practical experience, Guangzhou Jianming Machinery Equipment Co., Ltd. is an expert in the field of mechanical power systems and components. We began as a small machinery repair shop. Over the past two decades, we have accumulated a wealth of successful global case studies and maintenance expertise. Drawing on frontline experience in solving complex mechanical issues, we have earned widespread acclaim and grown into a comprehensive enterprise employing over 200 professionals. We deeply understand the challenges equipment faces under extreme conditions and possess extensive practical experience and professional expertise in the following areas: **Heavy Machinery Power Upgrades and Retrofitting:** We provide customized engine overhaul and replacement solutions for various types of construction machinery, with deep expertise in major power platforms such as Komatsu. **Mining and Industrial Equipment Maintenance:** We offer professional power optimization strategies to ensure equipment maintains continuous operational capability under heavy-load conditions. Agricultural and Irrigation Power Systems: We provide power unit upgrades and comprehensive troubleshooting services for various types of agricultural machinery and irrigation/drainage equipment. Leveraging our extensive technical expertise, we are also a robust supplier of spare parts: Comprehensive Spare Parts Supply: We offer a wide, carefully curated range of construction machinery parts—including piston assemblies, cylinder heads, crankshafts, engine overhaul gasket kits, and hydraulic components—to meet all your one-stop procurement needs. Our wealth of practical experience and robust supply chain system are our most valuable assets. Whether you are facing complex mechanical challenges or require reliable spare parts, Jianming Machinery possesses the expertise to help you succeed! Please contact our sales representative, Mr. Zhan. WeChat/WhatsApp: +86 180 2712 4770