Cadillac 19213355 Cylinder Asm,Rear Brake

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To remove the brake drum and brake shoes, start by unscrewing the brake line fitting from the rear of the wheel cylinder using a flare-nut wrench to avoid rounding off the corners. Be careful not to pull the metal line out of the wheel cylinder. Next, remove the two bolts securing the wheel cylinder to the brake backing plate and then remove the wheel cylinder. To prevent the loss of brake fluid and the entry of dirt, plug the end of the brake line. For the overhaul process, disassemble the wheel cylinder by removing the rubber boot from each end, pushing out the pistons and cups, and removing the cup return spring and expander. Replace the rubber parts with new ones from the rebuild kit. Inspect the pistons for scoring and scuff marks and replace them if necessary. Check the cylinder bore for score marks and corrosion, and if present, consider honing or replacing the cylinder. Clean the cylinder with brake system cleaner or denatured alcohol and ensure the bleeder screw hole is clean. Lubricate the cylinder bore with clean brake fluid and insert the new rubber cups, making sure the lip faces in. Install the expander spring and remaining cup, attach the rubber boots to the pistons, and then install the pistons and boots. Finally, for installation, attach the brake line to the wheel cylinder before tightening the mounting bolts and line fitting. Use a flare-nut wrench if available. Bleed the brakes and thoroughly test their operation before driving the vehicle in traffic.

Start by unscrewing the brake line fitting from the rear of the wheel cylinder using a flare-nut wrench. Be careful not to pull the metal line out of the wheel cylinder. Then, remove the two bolts securing the wheel cylinder to the brake backing plate and remove the wheel cylinder.

Ensure a rebuild kit is available beforehand.

Start by raising the rear of the vehicle and supporting it securely on jackstands. Block the front wheels to prevent the vehicle from rolling.

Be careful not to pull the brake line away from the wheel cylinder.

Replace the pistons if necessary. Consider honing or replacing the cylinder if there are score marks or corrosion.

Start by removing the rubber boot from each end and pushing out the pistons, cups, and spring expander. Discard the rubber parts and use new ones from the rebuild kit when reassembling. Inspect the pistons for scoring and scuff marks, replacing them if necessary. Check the cylinder bore for score marks and corrosion, honing slightly if needed or replacing if recommended. Clean the cylinder with brake system cleaner or denatured alcohol. Remove the bleeder screw and ensure the hole is clean. Lubricate the cylinder bore with clean brake fluid and insert a new rubber cup, making sure the lip faces in. Place the expander spring in the opposite end and push it in until it contacts the rear of the rubber cup. Install the remaining cup and attach the rubber boots to the pistons before installing them.

Attach the brake line to the wheel cylinder before tightening the mounting bolts and line fitting. Use a flare-nut wrench if available.