master cylinder

American  

noun

1. the hydraulic pump of an automotive braking system that contains a cylinder and one or two pistons, is actuated by the brake pedal, and supplies hydraulic fluid under pressure to the brakes at each wheel.

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master cylinder British  

noun

1. a large cylinder in a hydraulic system in which the working fluid is compressed by a piston enabling it to drive one or more slave cylinders See also slave cylinder

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Example Sentences

National Highway Traffic Safety Administration says in documents released Tuesday that fluid can leak from the brake master cylinder.

From Seattle Times • Mar. 22, 2022

“Several complaints allege repair facilities diagnosed the problem as brake fluid leaking from the master cylinder to the brake booster.”

From New York Times • Mar. 4, 2016

Pressure created in the master cylinder is transmitted to four so-called slave cylinders.

From Textbooks • Aug. 12, 2015

The SUVs may have been outfitted with a faulty brake master cylinder reservoir cap.

From Reuters • Jan. 11, 2012

“Anyway, he said that if I told you something, he would get me that master cylinder I need,” he confessed with a sheepish grin.

From "Twilight" by Stephenie Meyer