Sany Shaft-Transmission

Sany Parts engineering delivers critical power transmission components for heavy machinery. The Sany Shaft-Transmission is a fully integrated driveline assembly for excavators, wheel loaders, mining trucks, and crawler cranes. This complete Sany Shaft-Transmission combines a flange fork, universal joint assembly, shaft fork, sleeve tube, spline hub, grease cup, and clamp spring. Every component of the Sany Shaft-Transmission ensures angular flexibility and reliable torque delivery. Upgrade your fleet with a genuine Sany Shaft-Transmission engineered for demanding off-road applications.

The Sany Shaft-Transmission is a factory-engineered driveline assembly for Sany heavy machinery including excavators, wheel loaders, mining dump trucks, and crawler cranes. At the core of this Sany Shaft-Transmission lies the universal joint assembly (60049182), which provides the angular flexibility needed for off-road articulation. The flange fork (60049168) and universal joint fork (60049180) create robust connection points at both ends, ensuring secure linkage to the transmission output and axle input. The shaft fork (60049184) transmits torque from the universal joint into the main shaft body. The cross shaft assembly within the universal joint forms the functional heart, allowing the Sany Shaft-Transmission to transmit rotational power at varying angles up to ±25°.

The Sany Shaft-Transmission incorporates a telescoping design to accommodate chassis movement and suspension travel. The sleeve tube (60049175) and spline hub (60049177) work together as a sliding joint, allowing the shaft length to vary while maintaining positive torque transmission. The welding subassembly, pipe, sleeve, fork, shaft (60049185) integrates several components into a single structural unit, reducing potential failure points. The sliding action occurs through the precise engagement of the spline shaft fork with the matching spline hub, permitting up to 45mm of axial movement. The clamp spring (60049394) locks internal components in position, preventing accidental disassembly under high-torsion conditions. This combined flexibility makes the Sany Shaft-Transmission ideal for articulated machines such as wheel loaders and mining trucks.

Durability and longevity are engineered into every aspect of the Sany Shaft-Transmission. The entire assembly is manufactured from forged high-strength alloy steel with precision-ground surfaces and heat-treated to withstand high torque loads. A dedicated grease cup (A880899010001) provides a convenient point for manual lubrication of the universal joints and spline assembly. Regular lubrication minimizes wear and ensures smooth operation. The clamp spring retains vital components in place. All fasteners in the Sany Shaft-Transmission meet property class 10.9 specifications, ensuring vibration-resistant integrity under continuous operation. The heavy-gauge steel construction with corrosion-resistant coating ensures long service life in extreme conditions.

Originally OEM on SY excavators, SW loaders, SKT mining trucks, and STC cranes, the Sany Shaft-Transmission is available as a complete replacement assembly through the genuine parts network spanning 120+ countries. The modular design allows independent replacement of individual components such as the universal joint assembly, flange fork, or sleeve tube, reducing downtime and repair costs. All 9 Part Numbers are traceable through certified Sany distribution channels. Each unit is factory dynamic-balanced to within ISO 1940 Grade G16 standards, ensuring vibration-free operation at speed. Every component of the Sany Shaft-Transmission is built to Sany’s rigorous OEM specifications, backed by a comprehensive 24‑month warranty.

Daily Visual Inspection for Damage or Leaks: Before each shift, perform a complete walk-around inspection of the Sany Shaft-Transmission. Look for any visible damage to the flange fork (60049168), universal joint fork (60049180), and shaft fork (60049184). Inspect the sleeve tube (60049175) for dents or deformation that could restrict axial movement. Check the universal joint assembly (60049182) for any signs of rust or corrosion around the cross bearings. Look for grease leakage around the seal areas—this can indicate worn seals or over‑lubrication. Any visible damage or abnormal wear should be documented and addressed before further operation. Listen for any unusual clunking or vibration during initial movement which would indicate wear in the universal joints.

Lubrication of Universal Joints and Spline Assembly: Every 250 operating hours, lubricate the universal joint assembly (60049182) using the grease cup (A880899010001). Use high-quality extreme pressure (EP) lithium grease, NLGI Grade 2 with EP additives, as recommended by SANY. Apply grease until fresh material emerges from all four bearing seals on each universal joint. After lubricating, completely fill the spline hub cavity with grease to prevent moisture ingress. For the telescoping section, cycle the spline through its full range of travel while applying grease to ensure complete coverage. Never over‑grease the universal joints—excess grease can rupture the seals. If a joint will not accept grease, replace the universal joint assembly immediately as internal bearing contamination has likely occurred.

Clamp Spring Inspection and Spline Hub Check: Every 500 operating hours, verify that the clamp spring (60049394) is intact and properly seated in its groove. A missing or broken clamp spring will allow components to disengage under torque reversal, potentially causing complete driveline separation. Inspect the spline hub (60049177) internal splines for wear by attempting to rotate the shaft with the flange held stationary—any measurable rotational free play beyond 2 degrees indicates spline wear requiring replacement. Check the welding subassembly (60049185) for cracks around the weld joints, particularly where the sleeve tube meets the shaft. If any weld crack is found, replace the entire welding subassembly immediately; field welding of driveshaft components is not approved.

Universal Joint Wear Assessment: Every 1,000 hours, inspect the universal joint assembly (60049182) for free play. With the shaft secured, grasp each universal joint on both sides of the cross and attempt to rotate in opposing directions. Any rotary free play, clicking, or clunking indicates internal bearing wear requiring replacement. If the universal joint assembly shows radial play exceeding 0.3 mm at any bearing cup, replace the entire assembly. Always replace universal joints on both ends of the Sany Shaft-Transmission at the same time to maintain dynamic balance. Also inspect the shaft fork (60049184) for deformation; distorted forks will cause uneven bearing loading and premature universal joint failure.

Annual Full Driveline Inspection and Shaft Replacement: Every 2,000 operating hours, schedule a comprehensive inspection of the Sany Shaft-Transmission. Remove the complete assembly from the equipment. Measure the dynamic balance of the shaft—any imbalance above the factory specification indicates internal damage requiring replacement. Visually inspect each component for surface cracks using dye penetrant testing, especially around weld joints on the welding subassembly.

Replace the grease cup (A880899010001) if the check valve fails. Replace the clamp spring (60049394) each time the universal joint assembly is removed, as springs lose tension after compression. Have a certified technician confirm proper alignment of the flange fork to the mating equipment flanges. Following this comprehensive annual maintenance schedule extends the service life of the Sany Shaft-Transmission and ensures smooth, vibration-free power transmission.

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