Which component is used to prevent the hub from rotating during maintenance?

• A. High Speed Rotor Lock
• B. Clutch Assembly
• C. Brake Caliper
• D. Torque Sensor

Answer: (A)

When maintaining a hub, you need to immobilize the rotating parts so you can work safely and torque fasteners accurately. The high speed rotor lock is designed to grip and hold the rotor in place, preventing any rotation during service. This provides a secure, controlled lock that can handle the forces involved, reducing the risk of injury or damage and allowing precise maintenance work.

The other options don’t fit as well. A clutch assembly is meant to engage or disengage drive power, not to lock a rotating hub in place. A brake caliper slows or stops rotation but isn’t intended to hold the rotor stationary during maintenance and can introduce heat or wear. A torque sensor measures torque; it doesn’t stop rotation at all.