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On a good day, they'll bring a vehicle safely to a stop. On a bad day, they'll fail.

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Q: What do hydraulic brakes do?
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What are some examples of hydraulic devices?

dentist's chair and brakes of a car


Why aren't hydraulic brakes used for rear wheels when the same is used for the front wheels?

All modern mass-produced cars and light trucks DO have hydraulic brakes on the front and the rear wheels. Heavy trucks generally have air brakes on all the wheels. Maybe you are thinking of cars that have disk brakes on the front and drum brakes on the rear? On cars, these are both hydraulically operated using the same hydraulic (brake) fluid. In normal stopping situations, the front brakes do more work than the rear brakes. Maybe 70 or 80% of the braking is done by the front wheels (it depends on where the weight is in the car and how fast you stop). Disk brakes are a somewhat better brake for a car, but drum brakes are a little cheaper to manufacture. So, disk brakes are almost always used on the front wheels where the braking is more important. Drum brakes are used on the back of some cars to save money. Note that performance cars (sports cars) almost always have disk brakes on all of the wheels.


Can hydraulic and pneumatic be used together?

Yes - but not mixed. Pneumatic systems have more "give" (gas is compressible). Note that the power brakes on your car consists of both.


Can hydraulic pump can be used as hydraulic motor?

Instead of hydraulic pumps, hydraulic gear motor does not work. Hydraulic pump hydraulic motor blade is used instead.


What is a spool type hydraulic valve used to control?

Hydraulic actuators. Also called hydraulic rams or hydraulic cylinders.

Related questions

Which oil are used in hydraulic brakes?

hydraulic oil


Are bicycle brakes considered as hydraulic action?

depends on the type. There are hydraulic bike brakes, but most are mechanical.


Are disic brakes the same as hydrolic brakes?

No. Hydraulic brakes can be either drum or disc brakes, and these two brake types are available as air brakes and air-over-hydraulic systems, as well.


Was it 1938 or 1939 that Ford first used hydraulic brakes?

It was 1939 that Ford started to use hydraulic brakes.


Is a bicycle an hydraulic machine?

Depends. Most bikes don't have any hydraulic components, but some have hydraulic brakes. Usually disc brakes, but there are at least two models of hydraulic rim brakes as well. And it could easily be argued that suspension bikes with oil shocks are hydraulic in design.


What are hydraulic breaks?

Brakes that are actuated by a hydraulic fluid (such as brake fluid). Other types are air over hydraulic (air actuates hydraulics) and pneumatic (air) brakes.


How do you adjust brake imbalanced?

We would need to know what type of brakes you have... S-cam air brakes, air disc brakes, air piston brakes, air wedge brakes, hydraulic drum brakes, hydraulic disc brakes... they're all different.


How do you use the word hydraulic in a sentence?

The brakes in my car are hydraulic.


Do air brakes take longer to stop than hydraulic brakes?

Both air brakes and hydraulic brakes are capable of locking up the wheels. It would depend on the weight of the vehicle, tires and road conditions.


What types of brakes are there?

You have hydraulic brakes and air brakes. Hydraulic brakes can be drum or disc. Air brakes can be drum, disc, or wedge. On a lot of medium duty trucks and RVs, the parking brake can be a shaft brake, mounted to the back of the transmission.


What are Types of brakes?

You have hydraulic brakes and air brakes. Hydraulic brakes can be drum or disc. Air brakes can be drum, disc, or wedge. On a lot of medium duty trucks and RVs, the parking brake can be a shaft brake, mounted to the back of the transmission.


How do you replace the air brakes on a 2000 Mercury Mountaineer?

The Mercury Mountaineer has hydraulic brakes, not air brakes.