What precaution should be taken before removing the radiator cap on an overheated excavator?

Before removing the radiator cap on an overheated excavator, it is crucial to allow the machine to cool down. When an engine overheats, the cooling system is under high pressure and can contain very hot coolant. If the radiator cap is removed without allowing the system to cool down, there is a significant risk of hot coolant spraying out, which can cause severe burns or injuries.

Waiting for the machine to cool allows pressure to decrease and ensures that the coolant is at a safer temperature, reducing the risk of injury. This precaution is vital for ensuring both personal safety and the proper operation of the machine. While other options, such as using gloves or tools, could be relevant for general maintenance tasks, they do not address the immediate safety risks associated with handling an overheated radiator.