What is the Vacuum Brake Booster Check Valve about?
The vacuum brake booster check valve is a component of the brake booster, and plays an important role in brake system operation. It is a one-way valve that lets air to be sucked out of the booster, but does not let air to enter it. This is a safety solution to make sure that if the engine is turned off, or if frequent stops or pedal presses are needed, the brakes still work. Its capacity ensures that you have enough boost for several brake use. The vacuum brake booster check valve connects the vacuum hose from the engine to the body of the brake booster.
Bear in mind:
• The vacuum brake booster check valve is not produced to require maintenance, so it will not be checked during routine services.
• Damage to the vacuum hose from the engine can assume a problems with the check valve.
How it is done:
• The faulty vacuum brake booster check valve is found and identified
• The vacuum brake booster check valve is removed
• The new vacuum brake booster check valve is mounted
• The brakes are test run for proper vacuum brake booster check valve work
• The car is road tested and checked for proper vacuum brake booster check valve and brakes operation
Recommendation:
Many different issues can create challenges with the braking system, including air in the lines, dirty/burned brake fluid, and more. If you think a vacuum brake booster check valve issue, have an expert mechanics diagnose it.
What common signs indicate you may need to check the Vacuum Brake Booster Check Valve?
• Brake pedal feels spongy when pressed
• Brake pedal is very hard to press
• Brake pedal begins as easy to press then becomes very difficult
How vital is this service?
While a leak in the vacuum brake booster check valve will not reduce your ability to stop, it will make braking much more difficult and increase your stopping distance. It should be worked on as soon as possible.

more:http://www.automobileglobe.com/what-is-a-vacuum-brake-booster-check-valve/

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