Why must you LOTO the main disconnect switch before checking the oil reservoir?

Lockout/Tagout (LOTO) procedures are crucial for ensuring safety when performing maintenance tasks on machinery, including checking the oil reservoir. The primary reason for implementing LOTO on the main disconnect switch is to ensure that the pump does not start unexpectedly during maintenance, which could lead to serious injury or even fatality. By locking out the main disconnect, you are effectively isolating the electrical energy and preventing the equipment from being energized while you are working on it.

This practice safeguards technicians from the risks associated with moving parts, electrical components, or any operational functions that could inadvertently start when someone is attempting to check the oil reservoir. It is vital to prioritize safety and prevent any unforeseen actions that could occur during maintenance tasks. While other reasons may relate to maintenance practices, the main focus here is the prevention of accidental startup, which directly tackles the hazards involved in such maintenance work.