What Causes Brake Pump Oil Leakage?

1 Answers
StSadie
07/30/25 9:14am
Here are the reasons for brake pump oil leakage in cars: 1. Brake oil pipe rupture: The brake oil pipe is the device connecting the brake pump and the brake pad top column. When the brake pedal is pressed, the brake oil is transmitted through the pipe to the piston of the caliper, which then pushes the brake pad to squeeze the brake disc, creating a braking effect. If the brake oil pipe ruptures, oil leakage will definitely occur. 2. Issues with the connection gap between the piston and the inner wall of the sub-pump: Uneven connection gaps, foreign objects causing abnormal wear, etc., or it could be due to aging of the sealing rubber cup, leading to oil leakage from the brake sub-pump. 3. Damage to the sealing ring: Brake oil is highly corrosive. Although the sealing rings generally have resistance capabilities, over time they will age, naturally reducing their sealing function, which may lead to oil leakage.
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