Hydraulic Assembly

Fig. 2 Hydraulic Actuation Unit. Cougar, Thunderbird & 1989 Continental:

The hydraulic actuation unit, consists of two sections, the master cylinder and brake booster, which are arranged in the conventional fore and aft sequence. The booster contains a control valve, located in a parallel bore above the master cylinder. Under normal braking, the control valve modulates pressure of brake fluid from accumulator to rear brakes. The control valve also modulates boost pressure to master cylinder pistons. Under anti-lock braking mode, a main valve actuates, allowing pressurized brake fluid to enter chamber behind master cylinder pistons and into front brake circuit through solenoid valves as required.