What must be done when machines are to be tied up?

When machines are to be tied up, the correct procedure is to secure brakes, booms, locks, and hooks, then dismount. This process ensures that the machine is safe and secure, preventing any accidental movement or operational hazards when it is not in use. Properly securing the brakes prevents the machine from rolling, while securing booms, locks, and hooks protects both the equipment and personnel from unforeseen incidents.

In this context, turning off all power sources may not encompass all necessary safety measures. While it is important to turn off power sources, simply doing that without securing the other components does not fully ensure safety.

Securing brakes and fuel tanks only is insufficient because it overlooks the other critical components of the machine that require securing for comprehensive safety. Additionally, waiting for a supervisor's approval can introduce delays that may not be necessary. The focus should be on immediate and proper securing of the equipment as specified in the correct procedure.