After replacing a vacuum booster, the brakes lock up on a road test. Technician A says there is air trapped inside the brake lines. Technician B says the power booster pushrod needs adjustment. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Question

Quizplus · Accepted Answer

Technician B is correct because if the power booster pushrod is not properly adjusted, it can cause the brakes to apply pressure continuously, leading to them locking up during a road test. Air trapped inside the brake lines typically leads to a spongy brake pedal, not locked brakes.

After Replacing a Vacuum Booster, the Brakes Lock Up on a Road