Booster/Master Cylinder

The booster/master cylinder portion of the hydraulic assembly is an integral component and should never be disassembled. The booster/master cylinder uses a diagonally split configuration during normal braking. The two circuits are hydraulically isolated so a leak or malfunction in one circuit will allow continued braking ability in the other.

When force is applied to the brake pedal, the input pushrod applies force to the boost control valve. As the boost control valve is moved, it allows the pressurized fluid from the accumulator to flow into the master cylinder booster chamber. The pressure generated in the booster is directly proportioned to the brake pedal force exerted by the driver. This pressure in the booster servo in turn applies pressure to the primary master cylinder piston which in turn applies pressure to the secondary master cylinder piston. The pressure generated in the primary and secondary circuits are used to apply the brakes during normal braking.
WARNING: THE HYDRAULIC ACCUMULATORS CONTAIN BRAKE FLUID AND NITROGEN GAS AT HIGH PRESSURE. CERTAIN PORTIONS OF THE BRAKE SYSTEM ALSO CONTAIN BRAKE FLUID AT HIGH PRESSURE. REMOVAL OR DISASSEMBLY, WITHOUT DE-PRESSURIZING THE HYDRAULIC SYSTEM MAY RESULT IN PERSONAL INJURY AND IMPROPER SYSTEM OPERATION. REFER TO SECTION 3 ON CAR SERVICE, OF THIS MANUAL FOR PROPER SERVICE PROCEDURES.