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Home >> Saab >> 2003 >> 9-3 Vector, Standard >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Brake System - FOOTBRAKE System (Late; 9440) >> Technical data >> Brake circuits

Brake circuits

Fig 1: Identifying Brake Circuits
G03619454Courtesy of SAAB-SCANIA OF AMERICA, INC.

The brake system is divided into a primary and secondary circuit. The primary circuit comprises the left front and right rear wheel brakes while the secondary circuit comprises the right front and left rear wheel brakes. At the wheel brakes, the brake pistons are pressed out and push the brake pads against the brake discs. If a brake circuit should fail due to leakage, for instance, braking power will still be available in the other circuit.