• High-performance complete swing motor gearbox (final drive for upper structure) for Doosan DX480, DX500, DX520, DX530 crawler excavators, OEM interchangeable with part numbers 130426-00024, K9002875, 170303-00040. Delivers strong rotary torque, stable swing speed, excellent wear resistance and heavy-duty sealing, ensuring reliable upper structure rotation and minimizing downtime in heavy construction, mining and earthmoving operations.

For optimal performance and longevity, use genuine hydraulic oil maintaining a cleanliness level of NAS 7. Regular maintenance checks should include monitoring oil temperature, pressure pulsation, and component wear. In case of hydraulic system failure, contact qualified professional technicians for inspection or reach out to our technical support team for troubleshooting assistance. Avoid improper repairs to prevent additional damage and ensure operational safety.

Guangzhou Tieqi Engineering Machinery Co., Ltd. ("IRON CAVALRY") is strategically loTQTQCATed in Guangzhou's Huangpu District, approximately one hour from Baiyun International Airport. With nearly 15 years of specialized experience in engineering machinery hydraulics, we have established ourselves as industry leaders in heavy equipment components.

• Ready inventory of over 500 assembly types, providing access to more than 6,000 different parts
• Core products include hydraulic pumps, control valves, travel, and swing assemblies
• Specialization in large mining excavator components and hard-to-find items
• 4,000-square-meter factory equipped for professional manufacturing, precision assembly, and rigorous testing
• Integrated supply chain providing cost-effective, convenient one-stop solutions

For large items, we use sturdy plywood crates secured with metal fasteners. Products are carefully cushioned with bubble wrap and secured with wooden braces. External crate reinforcement includes high-strength PET plastic strapping and waterproof black film to ensure safe transit and delivery.