In crane operation, which of the following practices is crucial immediately before lifting a load?

Checking signals with the crew is a critical practice immediately before lifting a load in crane operation. Effective communication among the crew members ensures that everyone is aware of the lifting plan, the load's position, and any potential hazards. This pre-lift communication helps to establish clear signals that will be used during the lift, which is essential for safety and coordination.

Good communication minimizes the risk of misinterpretation and allows the operator to take appropriate actions in response to signals given by spotters or signal persons. This practice is particularly important because, during a lift, visibility and environmental conditions might change, and constant updates are necessary to maintain safety.

The other options do not align with safe lifting practices. Maximizing load weight can lead to overloading, which risks system failure. Speeding up the process may compromise safety checks and proper communication, and adjusting the load unilaterally can create an imbalance, leading to accidents. Hence, checking signals with the crew stands out as the most crucial action before lifting.