Ford 7L1Z-2140-E Cylinder Assy - Master

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To start the overhaul and installation process, pry the reservoir off the master cylinder and remove the old reservoir grommets, replacing them if cracked or torn. Depress the primary piston, remove the snap-ring, and take out the fluid control valve and brake pressure switch if present. Remove the primary and secondary piston assemblies from the cylinder bore, potentially tapping the master cylinder against a block of wood to expel the secondary piston.

Thoroughly wash and inspect all parts, including the cylinder bore, pistons, and seals.