What is the first step in the hydraulic braking process?

The first step in the hydraulic braking process is when pressurized fluid in the reservoir is forced through the master cylinder. This is critical because the braking system operates on the principle of hydraulic force. When the driver applies the brake pedal, it activates the master cylinder, which then pressurizes the brake fluid contained in the reservoir.

This pressurized fluid travels through the brake lines and into the brake calipers, ultimately enabling them to apply pressure to the brake pads against the rotors. Without this initial step of generating hydraulic pressure in the master cylinder, the entire braking system would be unable to function properly, as the subsequent actions rely on that pressure to initiate braking. Thus, understanding that pressurized fluid from the reservoir is essential in propelling the hydraulic system highlights the core operational mechanics of brake systems.