How to Bleed Brake Air?
2 Answers
Bleeding brake air method: 1. Locate the bleeder screw on the brake caliper, remove the dust cap from the bleeder port, then connect a rubber tube between the bleeder port and a drain bottle; 2. This step requires two people to cooperate - one person pumps the brake pedal 4-5 times inside the vehicle and then holds the pedal firmly depressed, while the other person loosens the bleeder screw on the caliper to allow air to escape along with brake fluid; 3. Repeat this process until only clean brake fluid emerges, indicating all air has been purged from the system; 4. Finally, tighten the bleeder screw to complete the process. The brake is a mechanical device that slows down vehicle speed, also known as a decelerator. The car's brake pedal is located below the steering wheel - when depressed, it activates the brake linkage which presses the brake shoes against the brake drum or rotor, causing the vehicle to slow down or stop.
Bleeding the air out of the brake system is a critical operation, which I often performed during car repairs. First, gather the necessary tools: a wrench, transparent tubing, a clean container, and fresh brake fluid. Having an assistant is crucial—one person to press the brake pedal while the other operates. Have your assistant pump the brake pedal a few times and then hold it down firmly. Meanwhile, you loosen the bleeder screw on the brake caliper and use the tubing to drain the old fluid into the container. Once the bubbles stop emerging, quickly tighten the screw. Repeat this process multiple times until the fluid flowing out is free of bubbles. Remember to top up the master cylinder with fresh brake fluid promptly to prevent the level from dropping too low. After completion, test the brake pedal—it should feel firm when pressed. Exercise caution throughout the process to avoid splashing brake fluid, as it is highly corrosive. If it gets on the car, wash it off immediately. For frequent drivers, it's advisable to inspect the brake system every two years to prevent air ingress and ensure safety.
