Lincoln F8AZ-2140-AA Cylinder Assy - Master

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Honing the master cylinder bore should be avoided as it may lead to improper fit with the rebuild kit.

To initiate the removal process, place rags under the brake line fittings, and prepare to cover the line ends after disconnecting them to prevent brake fluid spillage. Unscrew the tube nuts at the ends of the brake lines using a flare-nut wrench, pull the lines slightly away from the master cylinder, and plug the ends. Disconnect the brake warning light electrical connector, remove the two mounting nuts, and detach the master cylinder from the vehicle.

To efficiently bleed the system, bench bleed the master cylinder by filling the reservoirs with brake fluid and using threaded plugs in the outlet holes to force air from the cylinder. Stroke the piston assemblies several times for each outlet, ensuring all air is expelled. Refill the reservoirs, install the diaphragm and cap assembly, and proceed with the master cylinder installation in reverse order, followed by brake bleeding.