The handbrake, also known as the parking brake, is a secondary braking system that keeps a vehicle stationary when parked and can assist in emergencies. It is separate from the main hydraulic brake system and is typically applied with a lever, pedal, or electronic switch. Understanding how it works, when to use it, and how to maintain it can enhance safety and extend the life of your braking components.
What The Handbrake Does
The primary purpose of the handbrake is to hold a parked car in place, especially on inclines. It engages a mechanical connection to the rear wheels, creating a friction grip that prevents movement. In many vehicles, the handbrake also serves as a backup to the main brakes if a hydraulic failure occurs, providing a controlled stop at low speeds. Some modern systems use electronic controls or an automatic release, but the basic principle remains the same: a dedicated brake mechanism independent of the regular pedal or footbrake.
Types Of Handbrakes
Handbrake designs vary by vehicle and era. The most common types include:
- Traditional Mechanical Lever: A central lever pulled upward to engage rear brakes via a cable. It offers tactile feedback and straightforward adjustment.
- Foot Pedal Parking Brake: A pedal located near the driver’s footwell that pulls a cable when pressed, usually used in older or compact cars.
- Electronic Parking Brake (EPB): An electronically controlled system activated by a switch or button. It typically uses motors to apply the rear brakes and may include auto-hold and hill-start assist features.
- Console or Hand Lever With Electronic Assist: Combines a lever-like control with electronic actuation to improve ease of use and space utilization.
How To Use The Handbrake
Using the handbrake correctly protects your vehicle and your transmission. Follow these practical steps:
- Parking On Level Ground: Apply the handbrake fully and leave the transmission in PARK (automatic) or in first gear (manual) if required, then turn off the engine.
- Parking On an Incline: Apply the handbrake before shifting to Park (in automatics) or before releasing the clutch (in manuals). For added safety, turn the wheels toward the curb or away from traffic depending on the slope direction.
- Release Properly: In automatic transmissions, release the foot brake slowly as you release the handbrake to avoid jolts. In manual transmissions, you can gently release the handbrake after selecting the appropriate gear.
- Driving With EPB: Electronic parking brakes usually engage automatically when the vehicle stops completely or when the brake pedal is pressed, and release when you press the accelerator or operate the release control.
Maintenance And Safety
Regular maintenance helps ensure the handbrake remains reliable. Key practices include:
- Inspection: Have the handbrake cable and mechanisms inspected during routine brake service. Look for wear, fraying, or unusual slack.
- Adjustment: If the lever becomes loose or the parking brake fails to hold on an incline, an adjustment may be needed. This is common with older mechanical systems and should be performed by a qualified technician.
- Padding Wear: Some vehicles rely on rear brake pads to assist the handbrake. If these pads wear unevenly, it can reduce holding power and cause premature wear on the parking brake components.
- Emergency Readiness: Periodically test the handbrake at a safe, low-speed environment to confirm it engages and holds properly without pulling excessively.
Common Problems And Troubleshooting
Vehicle owners may encounter several typical handbrake issues. Awareness helps identify and address them promptly:
- Loose Lever Or Weak Hold: A lever that feels loose or a hold that isn’t strong enough can indicate cable stretch, worn drums or rotors, or insufficient adjustment.
- Dragging Brakes: If the handbrake feels tight but the rear wheels still spin, the mechanism may be stuck or out of adjustment, causing dragging and increased wear.
- EPB Malfunctions: Electronic parking brakes might display fault indicators, fail to engage, or not release properly. This often requires dealer-level diagnostics and software updates.
- Noise During Engagement: Squealing or grinding can signal worn rear brake components or a misadjusted cable that needs inspection.
Choosing A Vehicle With A Safe Handbrake
When evaluating a car, consider the following to ensure reliable handbrake performance:
- Type Preference: Electric parking brakes offer modern features like auto-hold and hill-start assist, but some drivers prefer the predictability of a traditional mechanical lever.
- Rear Brake Integration: Some vehicles rely on the main braking system for parking brake operation. In such cases, ensure rear drum or rotor condition is good, and that the parking brake system is properly adjusted.
- Maintenance History: A well-documented maintenance history can indicate a better-maintained handbrake system and lower risk of failure.
- Onboard Diagnostics: Vehicles with EPB may display fault codes. Access to dealer diagnostics and software updates can influence long-term reliability.
Practical Tips For Everyday Use
Maximize safety and reliability with these tips:
- Use On Slopes: Always use the handbrake when parking on an incline and avoid relying solely on transmission gear to hold the vehicle.
- Avoid Over-Restoring: Don’t repeatedly force the lever or pedal beyond its designed range. Gentle application prevents cable fraying and component wear.
- Combine With Wheel Position: Turn the wheels toward the curb on steep grades to reduce the chance of rolling if the parking brake fails.
- Professional Servicing: Have the brake system and parking brake components inspected during regular brake service intervals, especially if you notice reduced holding power or unusual noises.
In summary, the handbrake is a crucial, independent braking system that provides secure parking and an additional safety layer in emergencies. Understanding its types, proper use, maintenance needs, and common issues helps drivers maintain reliable performance and protect both the vehicle and its passengers.