Here's a general procedure. Specifics may vary slightly depending on your exact model and if you have any aftermarket modifications:
1. Preparation:
* Park on a level surface: Engage the parking brake firmly.
* Gather tools: You'll need a jack, jack stands, wheel chocks, lug wrench, socket wrench set (likely metric), possibly a caliper piston compression tool, rotor removal tool (if needed), and possibly a wire brush or brake cleaner.
* Safety glasses and gloves: Protect yourself from flying debris and potential chemicals.
2. Remove the Wheel:
* Loosen lug nuts: Use the lug wrench to slightly loosen the lug nuts *before* jacking up the vehicle. This prevents the wheel from turning while you're trying to remove the nuts.
* Raise the vehicle: Safely lift the vehicle using the jack and place jack stands securely under the frame near the jacking point. Consult your owner's manual for the correct jacking points.
* Remove the wheel: Unscrew the lug nuts completely and remove the wheel.
3. Remove the Caliper:
* Identify the caliper bolts: These are usually two bolts holding the caliper to the caliper bracket. They're typically 14mm or 15mm.
* Remove the caliper bolts: Carefully unscrew the bolts and remove them.
* Support the caliper: Use a bungee cord or wire to hang the caliper from the suspension. This prevents the brake line from being stressed or damaged. Do *not* let the caliper hang by the brake line itself. Some people use a coat hanger or similar item as well.
* Inspect the caliper slide pins: If equipped, these pins will be visible, and need to be inspected and lubricated with suitable caliper pin grease. Remove and clean any dirt or corrosion and reinstall with fresh grease. Sometimes it is necessary to carefully tap these out using a hammer and punch.
4. Remove the Rotor:
* Inspect the rotor: Check for rust or significant wear and tear.
* Remove the rotor: Some rotors can be simply pulled off. Others may require a rotor removal tool, depending on how tightly the rotor is seated on the wheel hub. If you have difficulty removing the rotor, use the tool to avoid damaging the rotor or the wheel hub. If needed, tap gently around the edge of the rotor with a rubber mallet to break it free.
5. Reassembly:
* Clean the hub: Use a wire brush or brake cleaner to remove any rust or debris from the wheel hub mating surface.
* Install the new rotor: Slide the new rotor onto the wheel studs.
* Reinstall the caliper: Ensure the caliper slides freely on its pins and is properly seated in the bracket.
* Reinstall caliper bolts: Tighten the bolts to the manufacturer's specified torque.
* Remove the bungee cord or wire.
* Reinstall the wheel: Tighten the lug nuts in a star pattern (opposite nuts first, then the ones in between). Do not overtighten.
* Lower the vehicle: Remove the jack stands and lower the vehicle carefully.
* Tighten lug nuts: Give the lug nuts a final tightening.
6. Important Notes:
* Consult a repair manual: A repair manual specific to your 2004 Jeep Grand Cherokee Limited is highly recommended. It will provide detailed diagrams, torque specifications, and other crucial information.
* Brake fluid: If you're replacing the calipers or brake pads, you may need to bleed the brakes afterward to remove any air that might have entered the system.
* Safety first: Always prioritize safety. If you're unsure about any step, consult a qualified mechanic.
This is a general guide. Always refer to a repair manual specific to your vehicle for the most accurate and safe procedure. Incorrect installation can lead to brake failure.
