1. Product Overview
This manual provides detailed instructions for the installation, operation, and maintenance of the MAC AmeriBRAKES Performance High Heat Carbon Brake Drum Kit. This kit is designed as an OE style replacement for Toyota Tacoma 4x4 6-Lug models manufactured between 2005 and 2022, including Pre Runner models with 6 Lug Rotors (2005-2015). The components are engineered for outstanding durability and consistent performance, meeting or exceeding OE specifications.
Figure 1.1: Complete MAC AmeriBRAKES Performance High Heat Carbon Brake Drum Kit. This image displays all components included in the kit, such as two brake drums, brake shoes, brake spring mounting kit, star wheel adjusters, wheel cylinders, brake hoses, and a brake bleeder tool kit.
2. Safety Information
Always prioritize safety when working on vehicle brake systems. Improper installation or maintenance can lead to serious injury or vehicle malfunction. If you are unsure about any step, consult a qualified automotive technician.
- Wear appropriate personal protective equipment (PPE), including safety glasses and gloves.
- Ensure the vehicle is securely supported on jack stands on a level surface before beginning any work. Never rely solely on a jack.
- Disconnect the vehicle's battery before working on electrical components, if applicable.
- Brake fluid is corrosive. Avoid contact with skin and vehicle paint. Clean up spills immediately.
- Dispose of old brake components and fluids according to local regulations.
- Do not reuse worn or damaged components.
3. Kit Components
The AmeriBRAKES Performance Carbon Rear Drum Brake Kit includes the following parts:
- 2x Part# DB794115: AmeriBRAKES Off Road Performance High Heat, High Carbon Content Rear Brake Drums
- 1x Part# 871: AmeriBRAKES Rear Brake Shoe Set (4 Shoes, for both rear sides)
- 1x Part# 17432K: Rear Brake Shoe Brake Spring Mounting Kit (for both rear sides)
- 1x Part# 2812K: Left Rear Star Wheel Adjuster Kit
- 1x Part# 2813K: Right Rear Star Wheel Adjuster Kit
- 2x Part# W131480: Rear Left and Right Wheel Cylinders
- 1x Part# 2204095: Left Rear Brake Hose
- 1x Part# 2204096: Right Rear Brake Hose
- 1x Part# W80626: One Man Brake Bleeder Tool Kit
Figure 3.1: AmeriBRAKES High Heat Carbon Rear Brake Drums (Part# DB794115). These drums feature a high carbon content for enhanced heat dissipation and durability.
Figure 3.2: AmeriBRAKES Rear Brake Shoe Set (Part# 871). This image shows the four brake shoes included in the kit, designed for optimal friction and wear resistance.
4. Setup and Installation
This section outlines the general procedure for installing the brake drum kit. Refer to your vehicle's specific service manual for detailed torque specifications and additional model-specific instructions.
4.1. Required Tools
- Jack and Jack Stands
- Wheel Chocks
- Lug Wrench
- Brake Spoon/Adjusting Tool
- Brake Spring Pliers
- Socket Set and Ratchet
- Torque Wrench
- Brake Cleaner
- Brake Fluid
- Bleeder Wrench
4.2. Pre-Installation Checks
- Verify that all kit components match the parts removed from the vehicle.
- Inspect new components for any shipping damage.
- Ensure the vehicle is cool before starting work.
4.3. Installation Procedure
- Prepare Vehicle: Park the vehicle on a level surface, engage the parking brake, and chock the front wheels. Loosen the rear lug nuts, then raise the rear of the vehicle and secure it with jack stands. Remove the rear wheels.
- Remove Old Drum: If the drum is stuck, use a rubber mallet to tap around the drum face. If equipped, remove any retaining clips or screws.
- Remove Old Brake Components: Carefully remove the brake return springs, hold-down springs, brake shoes, and star wheel adjuster. Note the orientation of all components for reassembly. Disconnect the old wheel cylinder and brake hose.
- Install New Wheel Cylinder and Brake Hose: Install the new wheel cylinder (Part# W131480) and brake hose (Part# 2204095/2204096). Ensure all connections are secure and properly torqued.
- Assemble New Brake Shoes: Install the new brake shoes (Part# 871) and the brake spring mounting kit (Part# 17432K). Ensure all springs are correctly positioned and tensioned. Install the new star wheel adjusters (Part# 2812K/2813K).
- Install New Brake Drum: Clean the inside surface of the new brake drum (Part# DB794115) with brake cleaner. Carefully slide the new drum over the brake shoes. If the drum does not fit, the star wheel adjuster may need to be backed off slightly.
- Adjust Brake Shoes: Adjust the star wheel adjuster through the access hole in the backing plate until the drum has a slight drag when rotated by hand.
- Bleed Brake System: Using the provided one-man brake bleeder tool kit (Part# W80626), bleed the brake system to remove any air introduced during the hose and wheel cylinder replacement. Follow standard brake bleeding procedures, starting with the wheel furthest from the master cylinder.
- Reinstall Wheels: Reinstall the wheels, hand-tighten the lug nuts, lower the vehicle, and then torque the lug nuts to the manufacturer's specifications.
5. Operating Considerations
5.1. Brake System Break-In
After installing new brake drums and shoes, a proper break-in procedure is crucial for optimal performance and longevity. This process helps to seat the brake shoes to the drum surface and burn off any manufacturing residues.
- Drive the vehicle at a moderate speed (e.g., 30-40 mph).
- Apply the brakes moderately (not hard) to slow down to about 10 mph. Do not come to a complete stop.
- Repeat this process approximately 10-15 times, allowing a few minutes between each cycle for the brakes to cool.
- Avoid heavy braking or prolonged stops immediately after installation.
- After the break-in period, allow the brakes to cool completely before normal driving.
6. Maintenance
Regular inspection and maintenance of your brake system are essential for safety and performance.
6.1. Regular Inspections
- Inspect brake shoes for wear at least every 12,000 miles or annually. Replace if friction material is less than 2mm thick.
- Check brake drums for excessive wear, scoring, or cracks. Drums should be replaced if they exceed the maximum diameter stamped on the drum or show significant damage.
- Inspect wheel cylinders for leaks. Replace if any leakage is observed.
- Check brake hoses for cracks, bulges, or leaks. Replace if any damage is found.
- Ensure the parking brake operates correctly and adjusts properly.
6.2. Cleaning
Periodically clean brake dust from the drum assembly using an approved brake cleaner. Avoid inhaling brake dust, as it may contain harmful particles.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Soft or Spongy Brake Pedal | Air in the brake lines; low brake fluid; faulty master cylinder. | Bleed the brake system thoroughly; check brake fluid level and add if necessary; inspect master cylinder. |
| Squealing or Grinding Noise | Worn brake shoes; foreign material in drum; improper shoe adjustment. | Inspect and replace brake shoes if worn; clean drum assembly; adjust brake shoes. |
| Vehicle Pulls to One Side During Braking | Uneven brake shoe wear; faulty wheel cylinder; contaminated brake shoe. | Inspect and replace brake shoes; check wheel cylinders for leaks; clean or replace contaminated components. |
| Excessive Brake Pedal Travel | Improper brake shoe adjustment; worn brake shoes. | Adjust star wheel adjusters; inspect and replace worn brake shoes. |
| Brake Dragging or Overheating | Over-adjusted brake shoes; seized wheel cylinder; parking brake issues. | Back off brake shoe adjustment; inspect and replace wheel cylinder; check parking brake cable and mechanism. |
8. Specifications
- Manufacturer: Mac Auto Parts
- Brand: MAC / AmeriBRAKES
- Model Number: 206950
- Brake Drum Part Number: DB794115
- Compatibility: Toyota Tacoma 4x4 6-Lug (2005-2022), Toyota Tacoma Pre Runner with 6 Lug Rotors (2005-2015)
- Brake Drum Material: High Heat, High Carbon Content
- Certification: Manufactured by ISO certified factories to meet requirements of fit, form, and function.
Figure 8.1: Carbon Content Percentage Comparison. This chart illustrates the carbon content of AmeriPLATINUM products compared to OE baseline and competitive brands, highlighting the role of carbon in determining rotor strength and heat management.
9. Warranty and Support
The warranty for your MAC AmeriBRAKES Performance High Heat Carbon Brake Drum Kit is stated on the product listing at the time of purchase. For specific warranty details or any product-related inquiries, please contact MAC Auto Parts customer support.
Figure 9.1: Warranty Information. This graphic confirms that warranty details are available on the product listing and encourages customers to contact support for questions.
