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How does the handbrake mechanism work?

The handbrake, also known as the parking brake or emergency brake, is a crucial safety feature in vehicles that helps prevent the car from rolling when parked or in an emergency. The handbrake mechanism works by applying friction to the wheels, effectively locking them in place and keeping the vehicle stationary.


Understanding the Handbrake Mechanism


The handbrake mechanism is typically located between the driver's seat and the center console, or on the dashboard. It is connected to the rear wheels of the vehicle through a series of cables and levers. When the handbrake is engaged, it pulls on these cables, which in turn apply pressure to the rear brake pads or shoes, causing them to grip the brake discs or drums and prevent the wheels from turning.


How the Handbrake Works



  • The handbrake lever is connected to a series of cables that run from the front of the vehicle to the rear wheels.

  • When the handbrake lever is pulled, it tightens the cables, which in turn apply pressure to the rear brake pads or shoes.

  • The brake pads or shoes grip the brake discs or drums, creating friction that prevents the rear wheels from turning.

  • This friction-based braking system effectively locks the rear wheels in place, preventing the vehicle from rolling.


The handbrake is designed to be a secondary braking system, used primarily for parking or in emergency situations when the main brakes fail. It is important to note that the handbrake should not be used while the vehicle is in motion, as this can cause the rear wheels to lock up and lead to a loss of control.


Maintaining the Handbrake


To ensure the handbrake mechanism continues to function properly, it is important to regularly check and maintain it. This includes adjusting the tension of the cables, inspecting the brake pads or shoes for wear, and ensuring the handbrake lever operates smoothly. Failure to maintain the handbrake can lead to it becoming ineffective, potentially putting the vehicle and its occupants at risk.

Does the handbrake lock one wheel?


A FWD or RWD car on the other hand will lock only one or two of the front or rear wheels. The parking brake on the other hand will lock up both rear wheels. I have never heard of a parking brake that will lock front wheels.



Is the parking brake set by pushing a pedal?


It is typically engaged by pulling up on a lever or pushing down on a pedal; in newer cars, it may be engaged by pressing a button or switch. The emergency brake can be used to stop your car in an emergency if your regular brakes fail. Refer to your vehicle manual to identify the location of your emergency brake.



What happens if you forget to release the handbrake while driving?


If you drive the car with the parking brake engaged, it may wear out the rear brakes to the point they may suffer a total failure. If you forget to release the handbrake and drive your car, you should immediately get your rear brakes checked as it may cause severe damage to the brake pads/shoes and rotors/drums.



How does the handbrake of a car work?


When the handbrake is applied, the brake cable passes through an intermediate lever which increases the force of the pull. This force is then split evenly between the rear brakes by an equaliser.



What is the difference between the parking brake and the handbrake?


Also known as a parking brake, hand brake and e-brake, the emergency brake was originally designed to be used if the vehicle's main braking system would fail. However, in today's vehicles, the parking brake doesn't have enough stopping power to bring the car to a halt.



How does the parking brake mechanism work?


If your vehicle has rear disc brakes and you pull the parking brake, then the cables engage a corkscrew device that pushes a piston into the brake pads, which stop the vehicle. In both instances, the parking brake bypasses the regular hydraulic brakes to stop the vehicle.



Are parking brake and handbrake the same?


Handbrakes are typically operated by a lever, while EPBs are activated by a button. This makes EPBs more convenient to use, as you don't have to reach for the lever. A traditional handbrake, also known as a parking brake or emergency brake, is manually operated by the driver using a lever or pedal.



Does the handbrake lock the front or back wheels?


In most vehicles, the parking brake operates only on the rear wheels, which have reduced traction while braking. The mechanism may be a hand-operated lever, a straight pull handle located near the steering column, or a foot-operated pedal located with the other pedals.



What happens if you leave the handbrake on while driving?


You should never drive with the parking brake on.
It can wear down your brake pads quickly, as well as cause excessive heat in the system that can do other types of expensive damage. You'll typically realize pretty fast if your parking brake is on when you drive – the resistance is very noticeable.



How does the handbrake work in an automatic car?


A driver uses the brake to stop the vehicle in case of an emergency. You can do this simply by pressing the head button, then pulling the stick upwards and releasing the button to turn on the handbrake. The car hand brakes are also known as parking brakes since they act to stop vehicles from rolling when parked.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.