Parking brake release involves which action?

• A. Manually cage and uncage parking brakes
• B. Bleeding air lines
• C. Replacing brake pads
• D. Adjusting steering gear

Answer: (A)

Parking brake release hinges on removing the lock that keeps the brakes engaged. In this context, you manually cage and uncage the parking brakes to free the linkage so the brakes can disengage. Caging places the mechanism in a safe, released state for service, and uncaging returns it to normal operation so the brake can actually release when commanded. This specific manual sequence is what allows the vehicle to roll again. Bleeding air lines, replacing brake pads, and adjusting steering gear are separate maintenance actions and not part of releasing the parking brake.