What is recommended for operator safety and comfort before driving off?

Prior to operating heavy machinery like an excavator, ensuring the safety and comfort of the operator is crucial. Adjusting the seat and mirrors helps the operator achieve an optimal driving position, reducing the risk of fatigue and enabling better visibility. Securing the safety belt is a fundamental safety measure that is critical for the operator's protection in the event of an accident or sudden movement of the machine. This practice is standardized in safety protocols to minimize the risk of injury.

Adjustments to the seat allow the operator to maintain control of the excavator more effectively, while proper mirror alignment ensures that the operator has a clear view of the surrounding environment, which is essential for safe operation. Together, these actions create a safer operating environment and enhance the overall efficacy of the excavator operation.

The other options, while important in their own right, do not directly contribute to operator safety and comfort before driving off. Reviewing the operator's manual is beneficial for understanding the machine's features and functions, checking for leaks is more pertinent for maintenance concerns, and inspecting the working environment is essential for safety but does not address the immediate comfort and readiness of the operator.