SBC function brake application in the event of system fault - GF42.46-P-3000T

MODEL 211 up to 31.5.06 except CODE (494) USA version except CODE (498) Japan version 

MODEL 211 up to 30.6.06 with CODE (494) USA version with CODE (498) Japan version 

Display in the event of a system malfunction 

Fig 1: SBC Function Brake Application In Event Of System Fault

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Display in the event of a system malfunction 

Function 

If faults occur in the system, the front axle brake circuit is braked hydraulically by the brake pedal. This process takes place without brake servo assistance.

The left front separation valve (A7/3y1) and right front separation valve remains open (A7/3y2) in the event of a fault.

The pressure is increased in the tandem master brake cylinder of the operating unit (1) by the brake pedal.

The spring assembly in the pedal pressure simulator (2) is compressed first.

Afterwards the pressure builds up further and is lead directly to the right front brake caliper (5a) and left front brake caliper (5b) of the front wheel brakes. The left front dividing piston (7) and right front dividing piston (8) prevents the brake fluid from flowing back and thus enables the pressure buildup.