Master Cylinder

Ford tandem dual piston master cylinder is a single casting with front and rear piston and a separate reservoir with an outlet for each piston.

Rear piston is operated by a push rod connected to brake pedal. Front, or floating, piston is operated by rear piston.

In a combination drum and disc system, reservoir which feeds disc brakes is larger, to correspond with large size of disc brake caliper cylinders. Master cylinder outlet which feeds drum brake has a residual valve under tube seat. Disc brake outlet has no valve, since disc brakes must not have any residual pressure.