What component controls the elevation of the moldboard during grading?

The lift cylinder plays a crucial role in controlling the elevation of the moldboard during grading operations. This hydraulic component is responsible for raising and lowering the moldboard to the desired height, allowing the operator to adjust the depth of cut or fill while maintaining the appropriate grading angle.

When the operator engages the lift cylinder, it extends or retracts through hydraulic pressure, effectively adjusting the moldboard's position relative to the ground. This precise control is vital for achieving the desired finish grade, ensuring proper drainage, and maintaining a consistent surface level. The lift cylinder allows for efficient grading operations by enabling quick changes in elevation as the grader moves through different sections of the terrain.

Other components, such as the set point lever and height adjustment switch, may assist in indicating or setting desired heights but do not directly control the elevation of the moldboard. The blade pitch cylinder adjusts the angle of the moldboard but does not affect its vertical position. Therefore, the lift cylinder is the primary mechanism for elevation control, making it the correct answer.