Why Does the Brake Pump Fail?
2 Answers
Reasons for brake pump failure: Long-term wear of brake pads and misalignment of the brake disc surface. It is recommended to re-grind the disc or replace the brake pads. Symptoms of a faulty car brake pump: 1. Soft brakes; 2. Sudden brake failure; 3. Brake pulling to one side; 4. Brake pedal not returning or slow to return. The brake pump is an indispensable component of the braking system, primarily responsible for pushing the brake pads, which then rub against the brake drum to slow down or stop the vehicle. When the brake is pressed, the master cylinder generates thrust to push hydraulic fluid to the wheel cylinders, where the internal pistons move under hydraulic pressure to push the brake pads.
This is quite common. I think if the brake master cylinder is failing, it's mostly due to the aging of the rubber cups inside the cylinder or the piston seals wearing out. Rubber components harden and crack over time, especially when brake fluid absorbs moisture and deteriorates, becoming more corrosive and directly ruining the seals. I once disassembled an old car that had run 100,000 kilometers, and the pistons inside were completely stuck. The owner mentioned that recently, pressing the brake pedal felt like stepping on cotton, with no strength. If you notice the brake pedal feels soft or slowly sinks when pressed, there's a high chance the master cylinder is leaking. Also, if the brake fluid reservoir is frequently low on fluid, be alert—it might be the wheel cylinder leaking quietly. This is not something to take lightly; it's safest to get it checked at a repair shop immediately, after all, brakes are what keep you safe.
