Terex
Slew gear reducer for Terex HC230
This slew gear reducer is designed for the Terex HC230 crawler crane. It manages the rotational movement of the crane superstructure to ensure precise positioning during operation.
Parts diagram
Compatible models
Specifications
- Part number
- 0669 779 UA
- Brand
- Terex
The slew gear reducer, part number 0669 779 UA, serves as the primary mechanical interface for the rotation system of the Terex HC230 crawler crane. This component is responsible for the controlled movement of the crane superstructure, allowing the operator to rotate the boom and cab assembly with accuracy. It functions by converting the high-speed, low-torque output from the hydraulic swing motor into the high-torque, low-speed output required to move the heavy upper structure of the crane.
This unit is compatible with the Terex HC230 crawler crane. It is engineered to handle the rotational forces and mechanical loads encountered during standard lifting and positioning tasks. The assembly ensures that the superstructure maintains stability during rotation, which is necessary for the safe operation of the crane.
In heavy machinery, a slew gear reducer acts as the final drive for the swing system. It provides the necessary gear reduction to translate hydraulic power into the mechanical force required to overcome the inertia of the rotating upper structure, ensuring smooth and controlled slewing movements.

