Are Your VW Brake Boosters doing Their Job?

The VW part that really amplifies your foot pedal pressure is the VW Brake Boosters. As you footstep on the pedal, the brake booster enhances the performance of built-in assist, which effectively multiplies the applied force to function a vacuum through the rubber hose, which runs from the intake manifold. The brake booster increases the compression in the master cylinder to energy other brake system components to come in contact with the brake discs and ensure stoppage. Backed by German precision engineering, brake boosters require built-in assist which you cannot find in drum brake vehicles.



There are cases when you have installed all brand new pistons, seals, hoses and pads in all wheels and also the hand brake. Then, after flushing the system and putting in the recommended fluid and bleeding properly, you still get a very hard pedal and very poor braking. You might suspect that the VW Brake Booster is not doing its job. Although when you pump the pedal a couple of times to expel the vacuum then put light pressure on the brake pedal with your foot and start the engine, you can feel the pedal get not greatly pulled down.

The thing to do is to have full engine vacuum at the booster, about 18" of vacuum. Any less then that you have in a vacuum can give a problem. Do some tests and inspections.

First in the testing process is to raise and support the front of the vehicle. Be sure one wheel will rotate freely. Start the car engine and allow vacuum to accumulate. Then, apply brake pedal several times. Be sure wheel is free to rotate immediately after pedal is released. If brakes bind, it means the booster is faulty.

With the car engine is running, apply brake pedal several times and check operation of pedal. If response is sluggish, then check the condition of vacuum hoses and booster unit air filter. Allow vacuum to build up, then switch off engine and operate brake pedal.

Pedal should be vacuum assisted for approximately three applications. Any less in applications will imply a leaking vacuum system or an inoperative check valve.

Operate brake pedal several times to evacuate any vacuum left in system with engine switched off. While maintaining light pressure on brake pedal, start the car engine. If booster unit is operating correctly, pedal will fall under existing pressure. However, if pedal remains stationary, it means there is a leak in the vacuum system.

With engine running, apply and hold brake pedal. Then, switch engine off. If pedal rises against foot pressure, it means the booster is faulty.

Those mentioned tests on the vacuum system, however, should only be performed if the hydraulic system is in satisfactory condition.

For more about your Volkswagen parts needs VW brake boosters, visit your trusted online source https://www.fiverbrakebooster.com.

Dantes Liu works as a manager at one of the top engineering firms in the business district of China. He is also a freelance journalist and has passion for anything automotive.

Inconclusion:

Are you searching for professional Manufacturer, Supplier, Distributor & Wholesaler auto parts online? FIVER Auto Parts Co.,Ltd specialize in designing, researching & developing, manufacturing, supplying, distributing and wholesaling Hydroboost, VW Brake Boosters, Hydro-Booster, Hydraulic Brake Booster, Brake Booster & Power Brake Booster in USA and other 20 countries. Its own manufacturing facility with advanced production and testing equipment. As an industry expert, FIVER is driven to deliver solutions for improved vehicle performance, safety, and overall operating cost.

Location: China

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