Before any maintenance work can begin on a hydraulic excavator, what is the critical safety procedure that must be implemented?

Question: Before any maintenance work can begin on a hydraulic excavator, what is the critical safety procedure that must be implemented?

Answer options:

• The engine must be left running to maintain hydraulic pressure.
• All personnel must be evacuated from the site. ✅ The equipment must be subjected to a 'lockout/tagout' procedure to prevent accidental startup or movement.
• Only certified mechanics are permitted within 10 metres of the equipment.

Correct answer: The equipment must be subjected to a 'lockout/tagout' procedure to prevent accidental startup or movement.

Explanation: Lockout/tagout is a critical safety procedure that physically ensures equipment cannot be started or energized during maintenance, preventing accidental injury to workers, as strictly required by OHS regulations.