General information
The hydraulic brake system consists of a master cylinder, a brake booster and disc brakes for the front and rear wheels. The braking system has two circuits. One circuit acts on the front brakes, the other on the rear. If one of the circuits fails, for example, due to fluid leakage, the vehicle is braked by another circuit. Fluid pressure in both circuits is created by a dual master brake cylinder acting from the brake pedal.
Description of the operation of the ABS anti-lock brakes, BAS brake booster and electronic stability program (anti-skid system) given in Section Manual.
The brake fluid reservoir is located under the brake master cylinder and supplies fluid to the entire hydraulic braking system.
The brake booster stores part of the vacuum created in the engine intake pipe. Since a diesel engine does not have the necessary suction vacuum, diesel vehicles have a special vacuum pump. With the help of an appropriate valve, if necessary, the force on the brake pedals is increased due to the action of vacuum.
The pedal-actuated parking brake acts through cables on the brakes on the rear wheels. Since the disc brake does not work as a parking brake, drum brakes are additionally installed on the rear wheels, which are integrated into the disc brakes. The drum brakes are actuated by the parking brake pedal only.
Security measures
When cleaning the brake system, dust is released that can be harmful to human health, so brake dust must not be inhaled.
Working with the brake system requires special cleanliness and strict adherence to instructions. In the absence of the necessary experience, it is advisable to contact the service station.
Note. When driving on wet roads, periodically press the brake pedal to remove moisture from the brake discs.
During the rotation of the wheel, moisture is discharged from the brake discs under the action of centrifugal force, but a silicone film, rubber abrasion products, grease and other contaminants remain, which reduce the effectiveness of the brakes.
After installing new brake pads, the latter should run in. Therefore, the first 200 km of the run should not be unnecessarily heavily braked.
Corrosion-damaged disc brakes create a shaking effect during braking that does not disappear with time. In this case, the brake discs must be replaced.
Dirt sticking to the surface of the brake pads and rain grooves lead to the formation of grooves on the surface of the brake discs, which leads to a decrease in braking efficiency.