Tools You'll Need:
* Jack and jack stands: Essential for safety. Never work under a vehicle supported only by a jack.
* Wheel chocks: To prevent the truck from rolling.
* Lug wrench: To remove the wheel.
* Wrench for caliper bolts: Usually 14mm or 17mm.
* Wrench or socket for brake line banjo bolt: Size varies – check your manual.
* C-clamp or caliper compression tool: To compress the brake caliper piston.
* Pliers: For various tasks, including removing cotter pins.
* Brake cleaner: To clean brake parts.
* New brake pads: Ensure you get the correct ones for your B2300.
* New rotors (optional): Inspect your rotors for scoring, wear, or damage. If they're questionable, replace them.
* Gloves: To keep your hands clean.
* Torque wrench: To tighten bolts to the manufacturer's specifications.
* Penetrating oil (PB Blaster or similar): Helps loosen stuck bolts.
Procedure:
1. Safety First: Park on a level surface, engage the parking brake, and chock the rear wheels. Jack up the front of the truck and securely place it on jack stands.
2. Remove the Wheel: Use the lug wrench to remove the lug nuts and take off the wheel.
3. Remove the Caliper:
* Locate the caliper bolts (usually two) on the caliper mounting bracket. Spray them with penetrating oil if they're stubborn.
* Use the appropriate wrench to remove the bolts.
* Carefully remove the caliper from the rotor. It might be a little heavy. You may need to support it with a wire or bungee cord to prevent it from dangling and putting stress on the brake line.
4. Compress the Caliper Piston: Using the C-clamp or compression tool, slowly and evenly compress the caliper piston. This creates space for the new, thicker brake pads. Be careful not to damage the piston seal. If brake fluid leaks out, you may have a problem with your seals.
5. Remove the Old Brake Pads: The old brake pads should slide out from the caliper.
6. Inspect and Replace the Rotors (if necessary): If replacing the rotors, remove them. They are usually held in place by bolts or may simply slide off.
7. Install New Rotors (if necessary): Clean the rotor mounting surface. Install the new rotors securely, ensuring they fit properly.
8. Install New Brake Pads: Slide the new brake pads into the caliper.
9. Reinstall the Caliper: Carefully reinstall the caliper onto the rotor and secure it with the bolts. Torque them to the manufacturer's specifications.
10. Reinstall the Wheel: Put the wheel back on and tighten the lug nuts. Don't overtighten.
11. Repeat Steps 3-10 for the other side.
12. Lower the Vehicle: Carefully lower the truck from the jack stands.
13. Bleed the Brakes (Very Important): After replacing brake components, air may have entered the brake lines. You'll need to bleed the brakes to remove this air. This requires two people: one to pump the brake pedal and one to open and close the bleeder valves on each caliper. Consult your vehicle's repair manual for the proper bleeding procedure.
14. Test the Brakes: Before driving, carefully test the brakes to make sure they work properly. If they feel spongy or unresponsive, you may have air in the lines and need to bleed the brakes again.
Important Notes:
* Brake fluid is corrosive and toxic. Wear gloves and eye protection. If you spill any, clean it up immediately.
* Always refer to your vehicle's repair manual for specific torque specifications and procedures.
* If you are not comfortable performing this repair, take your vehicle to a qualified mechanic. Brake failure can be dangerous.
This is a general guide. Always consult a repair manual specific to your 1994 Mazda B2300 before starting this repair. There are variations between models and years. Safety should be your top priority!
