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  2. Ford Super Duty - Wikipedia

    en.wikipedia.org/wiki/Ford_Super_Duty

    The diesel F-250 used vacuum-boost brakes, while the F-350 used Hydro-Boost brakes. Both gas versions of the F-250 and SRW F-350 used vacuum-boost. The F-250 was a Class 2 truck, while the F-350 SRW, F-350 DRW, and F-450 pickup were Class 3 trucks. The F-250 and F-350 (SRW and DRW) have 13.66-inch front brakes and 13.39-inch rear brakes.

  3. Hydraulic brake - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_brake

    The vacuum booster or vacuum servo is used in most modern hydraulic brake systems which contain four wheels, the vacuum booster is attached between the master cylinder and the brake pedal and multiplies the braking force applied by the driver.

  4. 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 ...

  5. 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.

  6. Vacuum pump - Wikipedia

    en.wikipedia.org/wiki/Vacuum_pump

    In the field of oil regeneration and re-refining, vacuum pumps create a low vacuum for oil dehydration and a high vacuum for oil purification. [44] A vacuum may be used to power, or provide assistance to mechanical devices. In hybrid and diesel engine motor vehicles, a pump fitted on the engine (usually on the camshaft) is used to produce a vacuum.

  7. Compression release engine brake - Wikipedia

    en.wikipedia.org/wiki/Compression_release_engine...

    A compression release engine brake, compression brake, or decompression brake is an engine braking mechanism installed on some diesel engines. When activated, it opens exhaust valves to the cylinders, right before the compression stroke ends, releasing the compressed gas trapped in the cylinders, and slowing the vehicle.

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