Ford F4TZ-2140-F Master Cylinder Assembly

To overhaul the master cylinder, clean the exterior with brake system cleaner and remove the reservoir cover or cap. Pour any remaining brake fluid into a container. Remove the secondary piston stop bolt and the snap-ring from the primary piston assembly. Remove the secondary piston assembly by tapping the cylinder against a wood block. Examine the bore of the cylinder for any damage. If necessary, replace the master cylinder body. Clean all parts with brake system cleaner and dip the new or overhauled secondary and primary piston assemblies into clean brake fluid before installing them into the cylinder bore. Depress the primary piston and install the snap-ring. Push in the primary piston and tighten the secondary piston stop screw.