Before repairing a hydraulic brake booster, what should you do?

Prepare for the Automotive Service Technician Period 1 exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Relieving stored hydraulic energy is essential when working on a hydraulic brake booster. The system uses a high-pressure circuit and an accumulator that can hold pressure even when the engine is off. Depressurizing the accumulator eliminates this stored pressure, preventing fluid from spraying and reducing the risk of damage to seals or components as you service the booster. Once the pressure is released, you can safely disconnect lines and perform the repair, then bleed the system and refill as needed. Replacing brake fluid, refilling the reservoir, or checking battery voltage doesn’t address the immediate safety issue of residual hydraulic pressure.