The braking system is equipped as standard with a booster, which is powered by an independent vacuum pump. In addition, the Sprinter model can be equipped with various additional systems that increase safety and improve the vehicle's performance. For example, ABS and automatic differential lock systems can be installed. They are described in more detail below.
Pic. 266. Scheme of the brake system with a pressure equalization valve: 1 - pressure equalization valve; 2 - front brake caliper; 3 - double pressure regulator; 4 - adjustable pressure equalization valve; 5 - rear brake caliper
Pic. 267. Scheme of the brake system without a pressure equalization valve: 1 - front brake caliper; 2 - pressure regulator; 3 - rear left brake caliper; 4 - rear right brake caliper
Depending on the modification, the vehicle is equipped with either a conventional rear brake circuit pressure regulator or an adjustable dual pressure regulator and a non-adjustable pressure equalization valve in the master cylinder. On fig. 266 and 267 schematically show the brake systems of both modifications.
When the brakes are applied, the brake discs located on the front and rear wheels cause a slowdown in rotation and reduce the speed of the vehicle. When you press the brake pedal, the pressure rod connected to it presses two pistons located one after the other in the main brake cylinder, which is mounted in the engine compartment on a vacuum booster. The pistons transmit pressure to the brake fluid in the master cylinder. Hydraulic pressure is generated, which is then transmitted through pipelines and hoses to the wheel brake cylinders. Under the pressure of their pistons, the brake pads are pressed against the discs. In more detail, the mechanism of action is as follows: since the brake caliper caliper has only one piston, the pressure created in the system is transferred to the latter, which in turn presses the brake shoe on one side. When this happens, the entire floating caliper caliper moves along the guide pins due to the pressure generated and the pad is pressed against the brake disc from the other side. So braking is carried out to the fullest.
The parking brake acts on the pads through a system of levers and cables. Due to the special design of the brake discs of the rear wheels, there is room at the rear for drum brakes. When the parking brake pedal is depressed, the front brake cable is driven, which is attached to the equalizer. A separate cable leads from the equalizer to the brake mechanism of each rear wheel. The force is transmitted to the drive lever, which unclenches the pads.
Front and rear wheel brakes are separately adjustable.