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The swing gearbox and slewing motor gear reducer assembly are designed to handle the load generated during the rotation of the excavator's upper structure. This includes the weight of the upper body, attachments, and the dynamic forces during operation. The load capacity is specified in terms of the maximum allowable torque and moment of inertia that the assembly can manage. For the Hitachi ZX70 series, the load capacity is engineered to meet the demands of various working conditions. The specific load capacity values should be obtained from Hitachi's product specifications.
Oil Requirements
To ensure proper lubrication and reduce wear, the assembly requires a specific type of lubricating oil. The recommended oil for the swing gearbox and slewing motor gear reducer is usually a high-quality gear oil with appropriate viscosity and anti-wear properties. The suitable viscosity range of the oil is generally between [C – D] cSt (centistokes) at the operating temperature range of the assembly, which is typically from -20°C to +80°C (-4°F to 176°F). The oil capacity of the assembly is also specified, and it is essential to maintain the correct oil level for optimal performance.
