If the master cylinder pushrod is adjusted incorrectly, what issue may arise?

When the master cylinder pushrod is adjusted incorrectly, brake drag is a likely outcome. The pushrod connects the brake pedal to the master cylinder and needs to be adjusted properly to ensure that the master cylinder functions effectively. If the pushrod is too long or improperly positioned, it can cause the master cylinder to maintain pressure on the brake system, even when the pedal is not being pressed. This continuous pressure keeps the brake shoes or pads in contact with the rotors or drums, leading to brake drag.

Brake drag can cause tires to heat up excessively, reduce fuel efficiency, lead to premature brake wear, and create an unsafe driving condition due to enhanced stopping distances and potential brake failure over time. Proper adjustment of the pushrod is, therefore, critical for optimal brake system performance and safety.

In this context, while issues like brake fade, increased pedal height, and fluid leakage can occur due to other malfunctions, they are not directly linked to an incorrect adjustment of the pushrod. Brake fade typically results from overheating, increased pedal height could be tied to other components being out of adjustment or malfunctioning, and fluid leakage usually indicates a problem with seals or hoses rather than pushrod adjustment.