What should an operator check on a stacker before starting it, as mentioned in safety guidelines?

Before starting a stacker, it is essential for the operator to check the battery charge and brake function to ensure safe operation. The battery charge is crucial because a low charge can affect the performance and efficiency of the stacker, potentially leading to it running out of power unexpectedly during operation. Similarly, the brake function is vital for safety as it ensures that the stacker can stop effectively when required. This is particularly important given that stackers handle heavy loads and the ability to control their movement is critical to prevent accidents.

While checking other aspects such as fuel levels, appearance and cleanliness, and coolant levels may also be part of routine maintenance, they are not as critical for the immediate safe operation of the stacker as confirming the battery charge and brake function. Ensuring that the stacker is fully charged and that the brakes are functioning properly directly contributes to the safety of the operator and those working around the equipment.