Here's a general outline of the process. Specific steps and parts may vary slightly depending on the manufacturer of your master cylinder. Always refer to a repair manual specific to your vehicle's year and model for detailed instructions and diagrams.
Tools & Materials:
* Master cylinder rebuild kit: This is crucial and contains new seals, cups, and possibly other parts. Ensure it's the correct kit for your master cylinder.
* Master cylinder bench bleeder: This makes bleeding the system much easier. You can use a vacuum bleeder as an alternative, but it's slower.
* Brake fluid: DOT 3 or DOT 5.1 (check your owner's manual or the master cylinder for the recommended type). Never mix DOT 3 and DOT 5! DOT 5 is silicone-based and incompatible.
* Socket wrench set: Including metric and standard sizes, as needed for your car.
* Wrench set: Open-end and box-end wrenches.
* Pliers: Needle-nose pliers are helpful for small parts.
* Clean rags: Lots of them. Brake fluid is corrosive.
* Container for old brake fluid: A catch pan.
* Wire brush: To clean the master cylinder bore.
* Compressed air: To clean out debris.
* Caliper: To measure the bore of the master cylinder
* Safety glasses: Essential for eye protection.
* Gloves: To protect your hands from brake fluid.
* Repair manual: A detailed manual specific to your 1964 Mustang is invaluable.
Procedure (General Steps):
1. Disconnect the battery: This is crucial for safety.
2. Drain the brake fluid: Open the bleeder valves at each wheel and carefully drain the fluid into your container.
3. Remove the master cylinder: This often involves disconnecting brake lines, removing mounting bolts, and possibly disconnecting the pushrod from the brake pedal. Be prepared for some brake fluid spillage.
4. Disassemble the master cylinder: Carefully remove the retaining clip (if present) and separate the cylinder body from the piston. Pay close attention to the order and location of each part. Take photos as you go!
5. Clean thoroughly: Use a wire brush, compressed air, and brake cleaner to meticulously clean all parts, especially the bore of the cylinder. Any debris will ruin the new seals.
6. Inspect parts: Check the cylinder bore for scoring or damage. If it's severely damaged, you might need a replacement master cylinder.
7. Install the rebuild kit: This step requires careful attention to the instructions included with the kit. Proper installation of the seals and cups is essential for proper function. Lubricate the new seals as directed.
8. Reassemble the master cylinder: Carefully reassemble the cylinder, ensuring all parts are correctly positioned. Again, refer to your photos and/or repair manual.
9. Install the master cylinder: Mount the rebuilt master cylinder back into the vehicle. Reconnect the brake lines and the pushrod.
10. Bleed the brakes: This is a crucial step to remove air from the brake lines. Use your bench bleeder or vacuum bleeder to bleed each wheel individually, following the proper bleeding procedure (typically starting with the furthest wheel from the master cylinder). Make sure the brake fluid reservoir remains full during bleeding.
11. Test the brakes: Carefully test the brakes, ensuring they function properly and there is firm pedal feel. If the pedal feels spongy or the brakes are weak, you'll need to troubleshoot and likely re-bleed the system.
Important Considerations:
* Compatibility: Ensure the rebuild kit is designed for your specific master cylinder. There can be variations even within the same year of vehicle.
* Cleanliness: Brake fluid is corrosive and cleanliness is paramount during the entire process.
* Bleeding: Proper bleeding is critical for safe and effective brakes. If you're unsure, have a professional do it.
* Safety: Always wear safety glasses and gloves. Brake fluid is hazardous and can damage skin and eyes.
This is a simplified overview. A detailed repair manual for a 1964 Ford Mustang is highly recommended to ensure you perform the rebuild correctly and safely. If you're not comfortable performing this task, it's strongly advisable to have a qualified mechanic do it. Brake failure can have serious consequences.
