One of the most important safety systems is the brake system. From its quality depends on the ability to stop in time if there are any obstacles on the way. It is important to keep the brakes in good and predictable condition. To do this, they must be regularly checked.

Diagnosis of the braking system at the stand or on road conditions. More accurate readings can be obtained on modern diagnostic stands. Works are carried out with any types of cars.

Content

• 1 What is a stand
• 2 The need for diagnosis
• 3 Procedure
• 4 Repair according to the results of diagnostics

What is a stand

The concept of a stand is usually understood to mean devices placed in specialized premises, the main purpose of which is a multi-level verification of the technical condition of the car. When bench diagnostics most often controlled by the following parameters:

• data on the total specific braking force;
• the value of the coefficient of relative non-uniformity;
• asynchronous processing parameters.

In industry, several different types of devices are used. Most of them operate on the principle of imitation of asphalt coating, where during the braking process the devices record the required data.

Stand for the diagnosis of the brake system

Such stands can be in the form of stand-alone equipment or be part of a large diagnostic complex.

The need for diagnosis

Diagnostics and repair of the braking system of the car is carried out both at the established maintenance interval for each model of car, and after identifying the alleged faults. The most frequent signs that a car needs to be examined are such situations:

• a clear increase in stopping distance on dry and hard surfaces;
• problems with the brake pedal stroke, in which there is either a deep droop, or a jamming of the stroke;
• a visible departure from the rectilinear movement when you press the brake pedal;
• vibrations, hum, creak in the area of ​​the brake system;
• constant decrease in fluid levels, visible drips.

Car brake system

Indirect symptoms include uneven wear of the surface of the brake pads, visible mechanical damage to the hoses or brake tubes. Such information is hard to get without removing the wheels. Means the driver must independently inspect the problem areas behind the wheel every 30-40 thousand km.

See also: brake discs are heated after replacing the pads - what to do?

Carrying out the procedure

During testing, it is necessary to monitor the state of the system as a whole and the individual nodes for operability. Before you carry out the diagnosis of the brake system on the stand, the following areas are checked:

• tank with brake fluid;
• condition of discs and drums;
• brake pads;
• stable operation of wheel bearing;
• support;
• the operation of the working cylinders;
• work of the amplifier and the main brake cylinder;
• condition of brake hoses.

During the diagnostics at the stand, the car should drive a pair of wheels onto the special rollers. Rotation of the rollers that simulate the road surface is connected with the help of electronics and various sensors with a computer. The installed program displays on the monitor data on the force-measuring information, the speed of rotation of the wheels, and the indications of the braking torque. The analysis is carried out by a specialized specialist of the enterprise.

At service stations, you can also find stands that store information about optimal braking distance data depending on the vehicle. During their operation, the monitor displays not only absolute values, but also an error.

Sensors operate on the hydraulic principle. Oil or brake fluid is poured into them with minimal viscosity readings so that the data have a lower error at negative temperatures.

After testing one axis, you need to check the performance of the second axis. To do this, the car just moves to the rollers of the other wheels. For all-wheel drive cars are used separate stands.

There is equipment that determines the force that is formed when you press the brake pedal. As a result, information is displayed as a graph on a computer display. The cost of various stands, depending on the complexity, is usually in the range of 500 ... 900 thousand rubles.

Repair according to the results of diagnostics

After identifying problems with the brakes, the car must be sent for repair. Most of the procedures associated with the operation of the brake system in the middle class cars are not the most expensive in the car. Most of them are able to perform a motorist on their own, even in garage conditions. For example, the replacement of brake pads is included in the list of mandatory maintenance work.

See also: Why is the ABS sensor lit

More time consuming are the replacement of the hose or main channels. Here you need experience or the help of professionals. It is absolutely necessary to deflate air bubbles from the system, which may adversely affect its performance. For pumping fluid from the air will need help mate.