What must be done to a tower crane after it has been climbed in order to ensure proper operation?

After a tower crane has been climbed, ensuring it is balanced is critical for proper operation. Climbing a crane alters its height and potentially its center of gravity, which can impact stability. A balanced crane minimizes the risk of tipping or swaying during operation, ensuring that the load is handled safely and that the crane can operate at its full capacity without compromising safety.

Balancing involves checking the distribution of weights, ensuring that the counterweights and boom configuration are appropriately set, and confirming that the crane is level. This is essential for maintaining safe operational conditions, especially as the crane might be lifting heavy loads in various positions.

The other options, while they address various aspects of crane operation and maintenance, do not specifically target the immediate needs after a climb. For instance, loosening base bolts would compromise stability, reconnecting the power supply may not be necessary if it was already connected, and changing the hook height may not be relevant to the immediate safety checks required post-climb.