1. Safety First:
* Park on a level surface and engage the parking brake. This is crucial.
* Chock the front wheels. This prevents the car from rolling.
* Wear safety glasses. Debris can fly.
* Have the right tools ready before you start. This makes the process smoother and safer.
2. Preparation:
* Loosen the lug nuts on the wheel. Don't remove them completely yet.
* Raise the rear of the vehicle securely using jack stands. Never work under a car supported only by a jack.
* Remove the wheel.
3. Drum Removal:
* Inspect the drum for any obvious obstructions. Rust, dirt, and brake dust can cause the drum to stick.
* Try tapping the drum gently with a rubber mallet. Start with light taps around the circumference. This can sometimes free it up.
* If tapping doesn't work, you'll need to address the brake shoes:
* Locate the adjuster (usually a star wheel) on the backing plate. This is the mechanism that adjusts the brake shoes. You might need a long screwdriver or a specialized adjuster tool to reach and turn it.
* Carefully turn the adjuster several clicks counter-clockwise. This will back off the brake shoes, giving the drum some clearance. Be very gentle as you don't want to damage the adjuster. You might need to alternate between tapping and adjusting several times.
* If the adjuster is severely seized, you might need to use penetrating oil (like PB Blaster) and let it soak for a while. This can help loosen up any corrosion. Reapply as needed.
* Once the shoes are backed off sufficiently, try tapping again. The drum should now slide off. If it's still stuck, you may need to:
* Use a drum puller. This tool is specifically designed for this purpose and is much safer than other methods that could damage the drum or backing plate.
* Consider using a slide hammer. Attach the hammer to the drum carefully to avoid damage.
4. After Removal:
* Once the drum is off, inspect the brake shoes and hardware. Replace worn or damaged components.
* Clean the drum and the backing plate thoroughly. Remove any rust or debris.
* Reassemble once repairs are complete, remembering to properly adjust the brake shoes. Refer to a repair manual for the correct procedure. Incorrect adjustment can lead to poor braking performance.
Important Notes:
* A repair manual for your specific vehicle is highly recommended. It will provide detailed instructions and diagrams that are specific to your 1991 Cadillac DeVille.
* If you're not comfortable performing this repair yourself, take it to a qualified mechanic. Improperly working on your brakes can be dangerous.
* If the drum is severely damaged, it might need to be replaced.
This process involves working with your brakes, which are critical safety components. If you are not confident in your abilities, please seek professional help. Safety should always be your top priority.
