How to check car brake? Car Maintenance

Most modern cars are equipped with a hydraulic brake system. This is in addition to the vacuum booster. This mechanism increases the force applied to the driver's pedal several times. In other words, vacuum brakes are much easier. However, like any other mechanism, the amplifier cannot function properly. In today's article, we will look at what is inside the vacuum brake booster, how to check it, and its principle of operation.

How does it work?

The principle of operation is built on the pressure difference. The amplifier housing includes two circuits separated by a membrane. Part of the circuit is connected by a pipe. The second end is connected to the sight valve. It monitors and regulates changes in inflow parameters.

How to check the vacuum brake booster

The diaphragm is stationary when driving or when the pedal is down. Soon the brake vacuum valve overlapped as the driver pressed. The diaphragm moves in the direction of the brake cylinder and the pushrod. The past and increases the effort.

If you press the metal pedal, the hole will increase. The high air pressure and negative pressure will be increasing. As a result, the pedal response is sharp. When the pedal is released, the diaphragm returns to the ground. The brakes are unclenched.

Process # 1

There are several ways to diagnose this element. All of these will be discussed in this article. So how do you check the vacuum valve with a brake booster by your own hands? It will be a diagnostic device, even if you remove it from the installation site.

So start the engine and deafen it after 8-10 or more seconds. Then press the pedal button in the usual effort to stop. If something goes wrong, the system will work once and the vacuum diaphragm spring will draw.

The next press will reduce the pressure in the system. Pedal travel will be less. However, it is important to ensure that the braking force is the first press. If the unit is tested, it is in working condition.

One important point: it must fall when the next pedal is started. This indicates that sufficient pressure has accumulated in the system. Both circuits are OK.

Process # 2

This test method is as follows. It should start the engine and depress the pedal. After that, stop the engine. In this case, hold it without the pedal and stay on the floor. After 25-30 seconds, then release. The mechanism should return to the original position as the excess pressure generated in the circuit. If the pedal is failed, it indicates a leak in the vacuum chamber.

The Bottom Line

Your brake system should be repaired or replaced. To do this properly, you need to go to the nearest automotive service station. The cost of a new element is around 13-15 Dollars. For some models of cars, this number is several times higher (around 45-60 Dollars). Therefore, it is sometimes advisable to do your vehicle’s brake repair or brake service to get a smooth drive.