249-1277 249-1278 8U-5851 Swing Joint for TQTQCAT M312 M315C M318C M320 M322C M325C M325D Wheel Excavators High precision Hydraulic Center Swivel Joint

• Precision manufactured for TQTQCAT M312 M315C M318C M320 M322C M325C M325D wheel excavators, fully interchangeable with OEM part numbers 249-1277, 249-1278 and 8U-5851 for direct installation.
• Multi-channel independent oil passage design avoids cross-interference between hydraulic circuits, supporting stable oil supply for rotation, working attachment and travel system.
• Hardened and polished rotating spindle improves wear resistance, ensuring stable performance under long-term high-frequency rotation.
• High-pressure multi-lip sealing system effectively prevents oil leakage and resists dust, water and mud in mobile construction scenarios.
• Integrated forged structure provides strong torsion and vibration resistance, adapting to frequent transfer and uneven road conditions of wheel excavators.
• Low-resistance flow design reduces pressure loss, maintaining efficient hydraulic transmission and avoiding slow or weak movement.

Guangzhou Tieqi Construction Machinery Co., Ltd. has specialized in engineering machinery hydraulics for nearly 15 years.

Strategically loTQTQCATed in Guangzhou's Huangpu District, approximately an hour from Baiyun International Airport.

• Ready inventory of over 500 assembly types with access to 6,000+ different parts
• Specialization in hydraulic pumps, control valves, travel, and swing assemblies
• Distinct advantage in large mining excavator components and hard-to-find items
• 4,000-square-meter factory equipped for professional manufacturing and testing

Our packaging includes sturdy plywood crates with metal fasteners, internal bubble wrap cushioning, wooden braces, high-strength PET plastic strapping, and waterproof black film to ensure safe delivery.

• One-stop solution provider for hydraulic components
• High-quality products at competitive prices
• Exceptional customer service
• Large inventory with short delivery times
• Long warranty periods
• Professional expertise in excavator components