What are the reasons for poor braking in a hydraulic brake system?
3 Answers
Poor parking brake performance in a hydraulic brake system is caused by worn brake pads. The importance of replacing brake pads and the criteria for determining when replacement is needed are as follows: Importance of replacing brake pads: Brake pads should be replaced after the vehicle has traveled 40,000 to 60,000 kilometers. Continuing to drive for extended periods without replacing the brake pads may lead to potential safety hazards at any time. Criteria for replacing brake pads: When the thickness of the brake pads is less than or equal to 0.5 millimeters, it is the most appropriate time for replacement. Many people find it difficult to measure the thickness of brake pads accurately. However, when the brake pad warning light on the dashboard illuminates, it is essential to check the thickness of your vehicle's brake pads.
I've been driving for over a decade and have encountered poor hydraulic braking system performance several times. The most common issues are insufficient brake fluid or air bubbles in the system, which make the brake pedal feel unusually soft and prevent proper force transmission to the wheels. Another cause is leakage in the cylinders or pipelines, such as aging seals in the master cylinder or wheel cylinders leading to pressure loss. Severe brake pad wear or scratched discs can also reduce friction. Additionally, brake fluid contamination or moisture absorption lowers its boiling point, making vapor lock more likely under high temperatures. I remember last time when my brakes suddenly felt weak, I immediately checked and found the brake fluid reservoir empty due to a small leak. In such situations, pull over right away to check if the fluid level is within the marked range, and replenish or repair as needed. Safety must always come first—never delay addressing brake issues.
As a daily driver, I've encountered issues with poor braking performance. Hydraulic system problems are often caused by insufficient brake fluid or air entering the system, requiring professional bleeding. Loose or corroded pipe connections leading to leaks can also result in pressure loss, with brake fluid slowly draining away. Another common issue is seized or rusted wheel cylinder pistons failing to properly push the brake pads. Additionally, expired or contaminated brake fluid with high water content can vaporize during braking, significantly reducing effectiveness. I've learned to have technicians check these points during every maintenance service, while also monitoring for a soft brake pedal or increased travel in daily use. At the first sign of abnormality, don't hesitate—head straight to the repair shop. Safety is priceless.
