9-5 Linear Sport Wagon (9600) L4-2.3L Turbo (B235) (2002)
/l4-2.3l_turbo_(b235)/Page-1677005.png)
The primary piston's central valve (3) leaves the stop pin (8), closing the return flow and causing the pressure in front of the primary piston to increase.
The increased pressure also acts on the secondary piston (4), which is pushed forwards with the result that its central valve (3) leaves the stop pin (7)
and closes.
The hydraulic pressure in both brake circuits increases, and since the pistons are the same size the pressure in both brake circuits is the same.
The pressure is propagated through the brake system and acts on the brake piston in each brake hydraulic body. The brake pistons press the brake pads
against the brake discs.
When the brake pedal is released, the pistons in the master cylinder return and the central valves open. The pressure is relieved and the brake piston in
each brake cylinder is returned to the rest (brakes off) position by the piston sealing ring.
Braking, one circuit out of order
If leakage occurs in the primary circuit
The primary piston is pressed forwards by the pushrod until it acts mechanically on the secondary piston. The secondary piston leaves the stop pin,
causing the central valve to close. Hydraulic pressure then builds up in the secondary circuit. Braking power is obtained in the secondary circuit only
(front right and rear left).
