Which of the following actions ensures stability while working on the edge of an excavation?

Maintaining a safe distance from the edge of an excavation is crucial for ensuring the stability of both the excavator and the operator. When the excavator is positioned too close to the edge, it can become unstable due to the risk of collapsing ground or shifting loads. By keeping the machine at a safe distance, the operator reduces the risk of tipping or causing a landslide, which can endanger both personnel and the equipment.

In contrast, actions like increasing speed during operation, frequently adjusting the slew position, or operating while carrying heavy loads can all contribute to instability. Speed can affect control, frequent adjustments can unbalance the machine, and carrying excessive weight can shift the center of gravity, all of which compromise the safety needed when working on or near an excavation edge. Thus, maintaining a safe distance is the best practice for ensuring stability in these situations.