What component is primarily responsible for balancing the stacker during operation?

The mast is primarily responsible for balancing the stacker during operation due to its role in lifting and stabilizing the load. The mast, which is the vertical assembly on the front of the forklift, allows the operator to lift loads to various heights while ensuring that the center of gravity remains within the vehicle's stability triangle. When a load is raised, the mast tilts backward, which helps counterbalance the weight, providing stability and control.

This balance is crucial because it prevents the stacker from tipping over, especially when moving loads or lifting them to significant heights. The design of the mast incorporates features that facilitate this stabilization, such as the way it is mounted and how it articulates during lifting and lowering operations.

While other components like the wheels and chains play important roles in movement and load handling, they do not directly contribute to the balance of the stacker in the same way the mast does. The steering wheel helps control direction but does not impact load stability directly. Therefore, the mast is essential for effectively maintaining balance and safety during operation.