What Causes a Tight Handbrake to Fail in Stopping the Car?
2 Answers
The reasons for a tight handbrake failing to stop the car include ineffective parking, worn brake pads, and damage to the handbrake braking system. Ineffective parking: This may be due to a loose cable, which can be fixed by tightening it. Worn brake pads: Severely worn brake shoes that have not been replaced in time can also affect braking performance. Handbrake braking system damage: Incorrect usage of the handbrake in daily use can cause severe damage to the system. The handbrake, professionally known as an auxiliary brake, operates differently from the main brake. It uses a steel cable connected to the rear brake shoes to apply braking force. Long-term use of the handbrake can cause the steel cable to undergo plastic deformation. Since this deformation is irreversible, prolonged use will reduce effectiveness and increase the handbrake's travel distance. It is necessary to seek a mechanic for repairs. Correct handbrake usage: Press the handbrake button before pulling it; apply gentle force when pulling the handbrake; pulling the handbrake to 70% of its capacity is sufficient, as pulling it to the maximum height will shorten the lifespan of the handbrake cable.
I encountered a similar issue last week where the car would still slide even after pulling the handbrake tight. There could be several reasons for this: first, the handbrake cable might have aged and loosened—while the lever appears tight, the internal cable could be worn and stretched, preventing effective tightening of the brake pads or drum. Second, the brake pads might be severely worn, especially the rear ones; if they haven’t been replaced for a long time, the metal backing might be too thin, resulting in insufficient friction when the handbrake is applied. Third, the adjustment screws could be loose or corroded, causing the cable travel to be insufficient—even if the handbrake lever is pulled all the way, the brake mechanism might not engage fully. Fourth, the wheel braking components might be stuck, such as rust or debris inside the brake drum, rendering the operation ineffective. I recommend gently releasing the handbrake and trying to pull it a few times to feel the resistance. If there’s no noticeable change, it’s best to drive to a repair shop immediately for inspection—don’t delay, as it could be dangerous if the car can’t hold on a slope. During routine maintenance, ask the mechanic to adjust the handbrake as a preventive measure to avoid such issues.
