What should be the condition of oil buffers when installed?

The condition of oil buffers when installed should be fully compressed. This requirement ensures that the buffer is adequately prepared to absorb the energy of the elevator car in the event of a drop. A fully compressed oil buffer allows for optimal functioning and performance, as it is positioned in a way that enables it to rapidly extend and absorb kinetic energy effectively during operation.

Being fully compressed means that the buffer is in its designed resting state, ready to respond to any sudden movement from the elevator car. This is crucial for the safety and reliability of the elevator system, as it minimizes the potential for damage during emergency situations.

In contrast, if the oil buffers are partially compressed, fully extended, or neither, they may not perform adequately. Partial compression could lead to reduced capacity, while fully extended buffers would not be able to absorb the necessary energy during a sudden stop. Hence, it is essential for oil buffers to be fully compressed to ensure they can function safely and effectively when the elevator operates.