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What to Do If the Exhaust Port of the Brake Master Cylinder Leaks Air?

1 Answers

DeSienna

07/29/25 6:51pm

The methods to address air leakage from the exhaust port of the brake master cylinder are: 1. Disassemble and clean it, then check if the air shut-off valve is damaged; 2. Install air filters on the two branch pipes leading to the master cylinder; 3. Inspect whether the rubber cup of the master cylinder is leaking air. The brake master cylinder, also known as the main brake cylinder, primarily functions to push brake fluid to each brake wheel cylinder to actuate the pistons. The working principle of the brake master cylinder is: When the brake pedal is pressed, the piston pushes the master cylinder forward, generating pressure in the cylinder's brake fluid, which forces the fluid through the pipes into each brake wheel cylinder. The wheel cylinder pistons then expand outward, pressing the brake shoes against the brake drum to create braking.

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