Mercury E43Z-2128-A Kit - Wheel Brake Cylinder Repair

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If an overhaul is indicated, usually due to fluid leakage or sticky operation, explore all options before beginning the job. It is recommended to install new wheel cylinders for ease. If rebuilding the wheel cylinder, ensure that rebuild kits are available beforehand. Always rebuild both wheel cylinders simultaneously. To remove, loosen the wheel lug nuts, raise the rear of the vehicle, support it on jackstands, and block the front wheels before removing the rear wheel(s). Next, remove the rear hub/drum and brake shoes. Disconnect the brake line from the back of the wheel cylinder and plug it, then unbolt the wheel cylinder and remove it from the backing plate, cleaning the mating surfaces. For the overhaul, remove the bleeder valve, cups, pistons, boots, and spring assembly from the wheel cylinder housing. Clean the wheel cylinder with brake fluid, denatured alcohol, or brake system cleaner, and use compressed air to remove excess fluid and blow out the passages. Check the cylinder bore for corrosion and score marks; use crocus cloth for light corrosion, but replace the cylinder if defects are severe. Lubricate the new cups with brake fluid and assemble the brake cylinder components, ensuring the cup lips face inward. For installation, position the wheel cylinder and install the bolts without tightening them yet. Connect the brake line to the wheel cylinder without tightening it, then securely tighten the brake line fitting. Install the brake shoe assembly, followed by the brake drum, and adjust the wheel bearing. Finally, bleed the brakes.