What can the set-up used in the brake system check for?

• A. Brake fluid pressure
• B. Rotor lateral runout
• C. Brake pad thickness
• D. Drum alignment

Answer: (B)

The setup used in the brake system primarily checks for rotor lateral runout, which is a critical measurement affecting braking performance. Rotor lateral runout refers to the variation in the distance from the brake pad to the surface of the brake rotor as the rotor is rotated. If the rotor is not perfectly flat and round, it can cause uneven wear of the brake pads and lead to a pulsating brake pedal during operation.

Measuring rotor lateral runout is vital because excessive runout can interfere with the consistent performance of the braking system, potentially leading to vibrations, reduced braking efficiency, and increased wear on components. This setup typically involves utilizing a dial indicator mounted to the suspension or a fixed point, allowing for precise measurements as the rotor is rotated.

Other aspects of brake system checks, like brake fluid pressure, brake pad thickness, and drum alignment, are indeed important, but the specific setup in question is designed to gauge lateral runout. Thus, the significance of evaluating rotor lateral runout cannot be overstated, as it directly impacts the effectiveness and safety of the braking system.