Main points
- When engaged, the parking brake lever or pedal actuates a mechanism that tightens a cable or hydraulic line connected to the brake calipers or drums on the rear wheels.
- It is also advisable to use the parking brake when the vehicle is parked on a flat surface for extended periods, especially if there is a risk of the vehicle being bumped or disturbed.
- In the event of a primary brake failure, the parking brake can be used as an emergency backup to slow down and stop the vehicle.
The parking brake, also known as the emergency brake or handbrake, is an essential safety feature in vehicles. Its primary purpose is to keep the vehicle stationary when parked on an incline or decline, preventing it from rolling away unintentionally.
How Does a Parking Brake Work?
Parking brakes typically operate on the rear wheels of a vehicle. When engaged, the parking brake lever or pedal actuates a mechanism that tightens a cable or hydraulic line connected to the brake calipers or drums on the rear wheels. This action applies pressure to the brake pads or shoes, creating friction against the rotors or drums, and bringing the vehicle to a standstill.
Types of Parking Brakes
There are two main types of parking brakes:
- Mechanical Parking Brakes: These brakes are manually engaged using a lever or pedal. They are typically cable-operated and require the driver to apply significant force to engage or release them.
- Electronic Parking Brakes (EPBs): EPBs are electronically controlled and can be activated with a switch or button on the dashboard. They are more convenient and offer features such as automatic hill-hold assist and release.
When to Use the Parking Brake
The parking brake should always be used when the vehicle is parked on an incline or decline, regardless of the transmission type. It is also advisable to use the parking brake when the vehicle is parked on a flat surface for extended periods, especially if there is a risk of the vehicle being bumped or disturbed.
Benefits of Using the Parking Brake
Using the parking brake provides several benefits:
- Prevents Vehicle Roll Away: The primary benefit of using the parking brake is to prevent the vehicle from rolling away unintentionally, especially on inclines or declines.
- Reduces Wear on Transmission: When the vehicle is parked in gear, the transmission components are under strain. Using the parking brake takes the load off the transmission, reducing wear and tear.
- Provides Emergency Braking: In the event of a primary brake failure, the parking brake can be used as an emergency backup to slow down and stop the vehicle.
Safety Considerations
While the parking brake is an essential safety feature, it is important to use it properly:
- Never Use the Parking Brake While Driving: Engaging the parking brake while the vehicle is in motion can cause the rear wheels to lock up, potentially leading to a loss of control.
- Release the Parking Brake Before Driving: Failure to release the parking brake before driving can damage the brake components and cause the vehicle to stall.
- Inspect the Parking Brake Regularly: Like any other brake component, the parking brake should be inspected regularly to ensure it is functioning properly.
Troubleshooting Parking Brake Issues
If you encounter any issues with your parking brake, here are some common problems and their solutions:
- Parking Brake Won’t Engage: Check the parking brake lever or pedal for any obstructions or damage. The parking brake cable or hydraulic line may also be broken or disconnected.
- Parking Brake Won’t Release: This could be caused by a frozen or seized parking brake mechanism. Try applying and releasing the parking brake several times to free it. If the problem persists, seek professional assistance.
- Parking Brake Light On: The parking brake light on the dashboard indicates that the parking brake is engaged. If the light stays on even when the parking brake is released, there may be an issue with the parking brake switch or sensor.
Final Thoughts: The Importance of the Parking Brake
The parking brake is a crucial safety feature that plays a vital role in preventing vehicle roll away and providing emergency braking. By understanding how it works, when to use it, and how to troubleshoot common issues, you can ensure the safety and reliability of your vehicle. Remember to always use the parking brake when parking on an incline or decline, and never engage it while driving.
What You Need to Learn
1. What happens if I don’t use the parking brake?
If the parking brake is not used on an incline or decline, the vehicle may roll away unintentionally, potentially causing an accident or damage to property.
2. Can I use the parking brake on a flat surface?
Yes, it is advisable to use the parking brake on a flat surface, especially if the vehicle will be parked for an extended period or if there is a risk of it being bumped or disturbed.
3. How often should I inspect the parking brake?
The parking brake should be inspected regularly, especially if it is used frequently. It is recommended to have the parking brake inspected by a qualified mechanic during routine vehicle maintenance.
4. What is the difference between a mechanical and an electronic parking brake?
Mechanical parking brakes are manually engaged using a lever or pedal, while electronic parking brakes are electronically controlled and can be activated with a switch or button on the dashboard.
5. Can I use the parking brake as an emergency brake?
Yes, the parking brake can be used as an emergency backup to slow down and stop the vehicle in the event of a primary brake failure.
