Buick 19175609 Cylinder Asm,Rear Brake

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To remove the wheel cylinder, start by raising the rear of the vehicle and supporting it securely on jackstands, while blocking the front wheels to prevent rolling. Then, remove the brake shoe assembly and clean any dirt or foreign material from around the wheel cylinder. Disconnect the brake line, being careful not to pull it away from the wheel cylinder. Next, remove the wheel cylinder mounting bolts and detach the cylinder from the brake backing plate, placing it on a clean workbench. Remember to immediately plug the brake line to prevent fluid loss and contamination. For the overhaul process, start by removing the bleeder valve, seals, pistons, boots, and spring assembly from the wheel cylinder body. Clean the wheel cylinder using brake fluid, denatured alcohol, or brake system cleaner, and use compressed air to remove excess fluid and blow out any passages. Check the cylinder bore for corrosion and score marks, using cloth to remove light corrosion and stains. If the defects cannot be easily removed or if the bore is scored, the cylinder must be replaced with a new one. Lubricate the new seats with brake fluid and assemble the brake cylinder components, ensuring that the seal lips face inwards. To install the wheel cylinder, place it in position and install the bolts. Connect the brake line and install the brake shoe assembly. Finally, bleed the brakes to complete the installation process.

Check the cylinder bore for corrosion and score marks, using cloth to remove light corrosion and stains.