!Guide! Master Cylinder Replacement/Bench Bleeding MK7 2011

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-Ford Fiesta Zetec JA8  08-13

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-Use a turkey baster to remove as much fluid from the brake master cylinder as you can
-Depress the tabs on the quick release connector for the clutch feed hose. Remove & elevate this line and secure it with a cable tie.
-Crack off both of the brake line unions on the brake master cylinder with mole grips (So that they do not round off)
-Fully unfasten both of the brake line unions on the brake master cylinder lines with a 13mm spanner & move them to one side (Preferably a flare spanner)
-Plug the brake line outlets with ear plugs
-Unbolt the 2 13mm nuts that secure the brake master cylinder to the brake booster (Spray them with penetrating oil & wire brush them first)
-Remove the master cylinder from the vehicle

-Clamp the master cylinder flange in the side of a vice so that it is parallel to the ground (Use rags so that you don't damage it)
-Attach fittings from a master cylinder bleeding kit to both of the outlets (Make sure they are nice and snug but not overtight)
-Attach hose lines to the fittings and then push the lines deep into the master cylinder reservoir (Make sure the lines are not going to fall out of the reservoir)
(YOU CAN MAKE YOUR OWN BLEEDING KIT BY PURCHASING 2 M10 MALE BRAKE LINE UNIONS & GLUE 2 LENGTHS OF 3/16" WASHER FLUID TUBING INTO THEM)

-Pour fluid into the master cylinder reservoir until it is above the maximum level line
-Slowly fully depress the master cylinder piston with a screwdriver. Allow the piston to return with the screwdriver still butted up. Wait 5 seconds then repeat.
-Keep doing this until no more air bubbles are coming through the lines

-Refit the master cylinder into the brake booster. Ensure that the brake booster pushrod enters the master cylinder piston centrally.
-Fasten the 2 13mm nuts @ 25Nm
-Remove the hoses from the reservoir
-Tightly place clingfilm over the fluid reservoir and reattach the cap to create a vacuum
-Remove the hose line fittings
-Fasten the 13mm brake line unions until they are reasonably tight (Preferably a flare spanner)
-Plug the clutch master cylinder hose back in until it clicks
-Fill the brake master cylinder reservoir with DOT4 fluid until it is at the max level mark

-Additionally bleed each brake line & the clutch line

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Useful sources:

How to Bench Bleed Master Cylinder

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