When working on a hydraulic system, what is always important to remember?

When working on a hydraulic system, it is essential to remember that the system is often pressurized. Hydraulic systems operate by using fluid under pressure to transmit force. This pressurized state is a critical aspect of how these systems function, as it allows them to perform various tasks efficiently, such as lifting, moving, or controlling machinery.

Recognizing that the system is pressurized is vital for ensuring safety and proper operation. If not properly managed, the pressurized fluid can lead to hazardous situations, such as leaks or bursts, which can cause injury or equipment damage. Understanding the implications of the pressurized state allows workers to take proper precautions, such as wearing appropriate personal protective equipment and following safety protocols during maintenance or repairs.

The other options focus on different aspects of system operation but do not capture the fundamental importance of recognizing the hydraulic system's pressurized nature during maintenance and operation. Therefore, it is critical for millwrights and technicians to always be aware of and respect the pressurized conditions inherent in hydraulic systems.