Description and operating principle of hydraulic brake drive

WARNING: Brake fluid contains polyglycerol esters and polyglycerol. Avoid contact with eyes. Wash hands thoroughly after handling brake fluid. If brake fluid gets into eyes, flush eyes with cold running water for 15 minutes. If irritation persists, seek medical attention. If brake fluid is swallowed, drink water and induce vomiting. Seek immediate medical attention. Failure to follow these instructions may result in injury.

The dual-circuit hydraulic brake system has a traditional design and is operated by a pedal.

The system includes the following elements:

• brake fluid reservoir with brake fluid level indicator
• brake lines and hoses
• master brake cylinder
• diagonally split brake circuits (left front and right rear and right front and left rear wheel)

Pressure sensitive pressure reducing valves (PCRV). PCRV valves are installed between the master cylinder and the brake lines leading to the rear wheels. PCRV valves control the hydraulic pressure supplied to the rear brakes, thereby reducing the risk of rear wheel lockup under braking.

Pressure sensors

Pressure sensors are installed on vehicles with a course stability control function. Pressure sensors detect the driver's intention to use the brake system (braking with the course stability control function engaged).

Pos.	Spare Part No	Name
1		Brake fluid reservoir
2		Pressure sensors (cars with a course stability function)
3		Master brake cylinder

Left hand drive

Pos.	Spare Part No	Name
1		Brake fluid reservoir
2		Vacuum brake booster
3		Hydraulic lines of the brake system
4		Crossbar ("universal")
5		Load sensitive control valve (universal)
6		Rear brake hose
7		Front brake hose

Right hand drive

Pos.	Spare Part No	Name
1		Master brake cylinder
2		Pressure-sensitive pressure reducing valve
3		Vacuum brake booster
4		Brake fluid reservoir
5		Hydraulic lines of the brake system
6		Rear brake hose
7		Front brake hose