Lincoln YL1Z-2140-AA Cylinder Assembly - Master

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Install new secondary piston seals with the lips facing away from each other, and lubricate the cylinder bore and piston assemblies with brake assembly lube or clean brake fluid before installing the pistons. Depress the primary piston, install the snap ring, and lubricate new reservoir grommets with brake fluid before pressing them into the master cylinder body. Attach the diaphragm to the reservoir cover and ensure it's in good condition.

Place rags under the brake line fittings and prepare caps or plastic bags to cover the ends of the lines when disconnecting them, taking care to avoid spilling brake fluid on painted surfaces.