Brake servo

The brake servo, also known as a brake booster, is a critical component in a vehicle’s braking system. It is designed to amplify the force applied by the driver on the brake pedal, making it easier to slow down or stop the vehicle. This component is particularly important in modern vehicles, which are heavier and require more force to stop effectively.

Basic Function

The primary function of the brake servo is to use engine vacuum to increase the force applied to the master cylinder when the driver presses the brake pedal. This amplification of force allows for more efficient braking with less physical effort from the driver. The brake servo is typically located between the brake pedal and the master cylinder.

Operation

The brake servo operates using a vacuum created by the engine. When the brake pedal is pressed, a valve opens, allowing atmospheric pressure to enter one side of the servo. The difference in pressure between the vacuum side and the atmospheric side creates a force that pushes on a diaphragm, which in turn amplifies the force applied to the master cylinder.

Maintenance

Regular maintenance of the brake servo is essential to ensure optimal performance of the braking system. Key maintenance tasks include:

• Checking for vacuum leaks: Ensure that all hoses and connections are secure and free from cracks or damage.
• Inspecting the diaphragm: Over time, the diaphragm inside the servo can wear out or become damaged, affecting performance.
• Testing the check valve: The check valve ensures that vacuum is maintained in the servo. It should be tested periodically to ensure it is functioning correctly.

Failure

Brake servo failure can lead to a significant reduction in braking efficiency, making it harder to stop the vehicle. Common signs of brake servo failure include:

• Increased brake pedal effort: If the servo is not functioning, more force will be required to press the brake pedal.
• Hissing noise: A hissing sound when pressing the brake pedal can indicate a vacuum leak.
• Spongy brake pedal: A soft or spongy feel when pressing the brake pedal can be a sign of a failing servo.

If any of these symptoms are observed, it is crucial to have the brake system inspected and repaired by a qualified technician to ensure safety.

Basic Function: Provide the primary role of the Brake servo in the vehicle system.

Operation: Explain how the Brake servo functions within its system.

Maintenance: Describe maintenance best practices for the Brake servo to ensure longevity.

Failure: Common issues that arise when the Brake servo fails and potential solutions.

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