Ford 1L5Z-2261-GA Cylinder

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If an overhaul is indicated, usually due to fluid leakage or sticky operation, explore all options before beginning the job. New wheel cylinders are available, making this task quite easy. If rebuilding the wheel cylinder is chosen, ensure a rebuild kit is available before proceeding. Always rebuild both wheel cylinders at the same time. To remove the wheel cylinder, raise the rear of the vehicle and support it securely on jackstands, blocking the front wheels to prevent rolling. Remove the brake shoe assembly and clean all dirt and foreign material from around the wheel cylinder. Disconnect the brake line by removing the fitting and the two mounting bolts without pulling the line away from the cylinder. Remove the mounting bolts and detach the wheel cylinder from the brake backing plate, placing it on a clean workbench while immediately plugging the brake line to prevent fluid loss and contamination. For the overhaul, remove the bleeder screw, cups, pistons, boots, and spring assembly from the wheel cylinder body. Clean the cylinder with brake fluid, denatured alcohol, or brake system cleaner, and use compressed air to remove excess fluid and blow out the passages, ensuring the air is filtered and unlubricated. Check the cylinder bore for corrosion and score marks; use crocus cloth for light corrosion, but replace the cylinder if defects cannot be easily removed or if the bore is scored. Lubricate the new cups, pistons, and cylinder bore with brake fluid, then assemble the brake cylinder components, ensuring the cup lips face inward. For installation, place the wheel cylinder in position, install the mounting bolts, and tighten them to the specified torque. Connect the brake line and install the brake shoe assembly, then bleed the brakes.

Check the cylinder bore for corrosion and score marks. Crocus cloth can be used to remove light corrosion and stains, but the cylinder must be replaced with a new one if the defects cannot be removed easily, or if the bore is scored.