This explanation covers the rear drum brakes. The front disc brakes are a different process. Always consult a repair manual specific to your 1997 Ford Expedition for detailed instructions and torque specifications. This is a general overview and may not cover every nuance.
Tools you'll need:
* Jack and jack stands (safety is paramount! Never work under a vehicle supported only by a jack)
* Lug wrench
* Wheel chocks
* Socket set (various sizes, including metric)
* Wrenches (various sizes, including metric)
* Brake drum removal tool (a slide hammer or similar)
* C-clamp (for compressing the wheel cylinders)
* Wire brush
* Brake cleaner
* New brake shoes, wheel cylinders (if necessary), hardware (springs, clips, etc.)
* Grease
* Pliers
* Safety glasses
* Gloves
Rear Drum Brake Replacement (General Steps):
1. Safety First: Park on a level surface, engage the parking brake, and use wheel chocks on the wheels that are *not* being worked on.
2. Remove the Wheel: Loosen the lug nuts before jacking up the vehicle. Jack up the vehicle and securely place it on jack stands. Remove the wheel.
3. Remove the Drum: This can be difficult. Often, the drum is stuck due to rust. You may need to use a slide hammer or other drum removal tool to gently tap it off. Be careful not to damage the drum.
4. Inspect Components: Once the drum is removed, inspect the brake shoes, wheel cylinders, springs, and other hardware for wear, damage, or leaks. Replace any worn or damaged parts.
5. Clean Everything: Thoroughly clean all components with a wire brush and brake cleaner.
6. Compress Wheel Cylinders: Using a C-clamp, carefully compress the wheel cylinders. This will allow you to remove the old brake shoes.
7. Remove Old Brake Shoes and Hardware: Carefully remove the old brake shoes, springs, clips, and other hardware. Note the arrangement of everything—it's crucial to put it back together correctly.
8. Install New Brake Shoes and Hardware: Install the new brake shoes, springs, clips, and other hardware. Make sure everything is positioned correctly according to your repair manual or the diagrams on the new shoes' packaging.
9. Adjust Wheel Cylinders (if necessary): If the wheel cylinders were compressed, make sure they retract smoothly. Some systems have an automatic adjuster; others might require manual adjustment. Your repair manual will have instructions.
10. Reinstall the Drum: Carefully reinstall the brake drum, ensuring it slides on easily. If it's still tight, there may be something preventing it from seating properly.
11. Reinstall the Wheel: Tighten the lug nuts snugly, then lower the vehicle to the ground. Tighten the lug nuts fully using the appropriate torque specification from your repair manual.
12. Pump the Brakes: Pump the brake pedal several times to build up pressure and ensure the brakes are working properly. Check for leaks.
13. Test Drive: Take a short test drive to verify proper braking performance.
Important Considerations:
* Bleeding the Brakes: After working on the brakes, it's *highly recommended* that you bleed the brakes to remove any air that may have entered the system. This is a separate process that requires two people.
* Repair Manual: A repair manual specific to your 1997 Ford Expedition is essential. It will provide diagrams, torque specifications, and step-by-step instructions specific to your vehicle.
* Safety: Always prioritize safety. Never work under a vehicle supported only by a jack. Use jack stands and follow all safety precautions.
This is a general guide. The specific steps and tools might vary slightly depending on your Expedition's configuration. Again, consulting a repair manual is crucial before attempting this repair. If you are uncomfortable performing this repair yourself, seek professional help from a qualified mechanic. Your safety is paramount.
