Question

Tech A says that bench bleeding a master cylinder will prevent having to bleed air from the brake lines during replacement. Tech B says that bleeding the master cylinder on the vehicle is preferred to verify brake pedal and booster operation. Who is correct?

Answer 1

Tech B

Step-by-step explanation:

Bleeding the master cylinder on the bench does nothing for the air in the brake lines on the vehicle. The bench bleeding is a preferred first step, but bleeding the rest of the brake system is also required. A final check of proper operation on the vehicle should also be accomplished.

Tech B is correct.