In a hydraulic parking brake system, what components should be inspected?

• A. Actuators, lines, and linkages
• B. Tires and wheel rims
• C. Windshield wipers
• D. Fuel injectors

Answer: (A)

The main idea here is that a hydraulic parking brake relies on fluid pressure to move a component that locks the wheels. The parts you must inspect are the actuator, the hydraulic lines, and the linkages that translate the actuator’s movement into braking force. If the actuator is sticking, leaking, or not generating enough hydraulic pressure, the parking brake may not engage or hold. Leaks or damage in the lines can leave you with insufficient pressure, and worn or binding linkages can prevent the force from being applied or released smoothly. Together, these elements directly control how the parking brake engages and releases, so they’re the focus of inspection.

The other items listed aren’t part of the hydraulic parking brake mechanism: tires and wheel rims affect overall rolling and safety but don’t determine the parking brake’s function; windshield wipers and fuel injectors are unrelated to braking systems.