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  2. Brake bleeding - Wikipedia

    en.wikipedia.org/wiki/Brake_bleeding

    A brake bleed screw is normally mounted at the highest point on each cylinder or caliper. There are five main methods of bleeding: [1] The pump and hold method, the brake pedal is pressed while one bleed screw at a time is opened, allowing air to escape. The bleed screw must be closed before releasing the pedal, or a one-way valve must be fitted.

  3. Vacuum brake - Wikipedia

    en.wikipedia.org/wiki/Vacuum_brake

    Vacuum brake cylinder in running position: the vacuum is the same above and below the piston Air at atmospheric pressure from the train pipe is admitted below the piston, which is forced up. In its simplest form, the automatic vacuum brake consists of a continuous pipe—the train pipe—running throughout the length of the train.

  4. Power brakes - Wikipedia

    en.wikipedia.org/wiki/Power_brakes

    Vacuum boosters provide brake assist for the driver by multiplying the force out of the booster creating more than the force that was used to push on the brake pedal. The booster works by pulling the air out of the booster chamber with a pump or other vacuum source (typically the engine's intake manifold [ 1 ] ), creating a low-pressure system ...

  5. Vacuum servo - Wikipedia

    en.wikipedia.org/wiki/Vacuum_servo

    A vacuum servo is a component used on motor vehicles in their braking system, to provide assistance to the driver by decreasing the braking effort. In the US it is commonly called a brake booster . A vacuum servo, also known as a power booster or power brake unit, uses a vacuum, usually supplied by the engine, to multiply the driver's pedal ...

  6. Brake fluid - Wikipedia

    en.wikipedia.org/wiki/Brake_fluid

    Old brake fluid container Brake fluid reservoir in a Škoda Fabia I A tell-tale symbol indicating low brake fluid level. Brake fluid is a type of hydraulic fluid used in hydraulic brake and hydraulic clutch applications in automobiles, motorcycles, light trucks, and some bicycles. It is used to transfer force into pressure, and to amplify ...

  7. Vacuum delay valve - Wikipedia

    en.wikipedia.org/wiki/Vacuum_delay_valve

    A vacuum delay valve is a valve with a small orifice, which delays a vacuum signal. These are commonly used in automobiles to alter the behavior of vacuum switches, ...

  8. Brake fluid pressure sensor - Wikipedia

    en.wikipedia.org/wiki/Brake_fluid_pressure_sensor

    The fault could be lack of hydraulic fluid, low brake fluid in the reservoir, a broken hydraulic line or a bad master brake cylinder. The sensor is used to detect pressure differentials in the hydraulic system. If the car alerts a fault in the hydraulic system and the system checks out, the sensor itself may have failed. [2]

  9. Railway air brake - Wikipedia

    en.wikipedia.org/wiki/Railway_air_brake

    In the steam era, Britain's railways were divided–some using vacuum brakes and some using air brakes–but there was a gradual standardization on the vacuum brake. Some locomotives, e.g. on the London, Brighton and South Coast Railway , were dual-fitted so that they could work with either vacuum- or air-braked trains.

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