Before lubricating a governor tension sheave in a traction elevator pit, what action must be taken?

Before lubricating a governor tension sheave in a traction elevator pit, it is essential to lock out and tag out the elevator system. This action ensures that the elevator is completely shut down and cannot be accidentally restarted while maintenance is being performed. The lockout/tagout procedure is a critical safety measure that protects maintenance personnel from potential hazards associated with moving machinery, particularly in the confined space of an elevator pit where contact with moving parts could lead to serious injury.

Implementing lockout/tagout procedures involves placing a lock on the energy isolating device and tagging it with a warning sign, which indicates that maintenance is in process. This prevents unauthorized personnel from operating the elevator while work is ongoing, thereby significantly enhancing workplace safety.

While checking lubrication type, inspecting the sheave for wear, and notifying the building manager are important actions that may be relevant to overall maintenance practices, they do not take precedence over ensuring the safety of personnel through the lockout/tagout process. Safety procedures must always come first in any maintenance or repair operation.