Tech Tip # 21      Brake Pad break-in procedure
 

1. First read through the entire procedure and find a suitable, safe and legal area to perform the necessary decelerations.

2. At the break-in location, make a series of 10 decelerations from approximately 60mph to 5-10mph. At the end of each deceleration, immediately accelerate to approximately 60mph again for the next deceleration. Run all decelerations continuously in 1 cycle.

3. During the deceleration, the exact speed is not critical. Do not watch the speedometer, keep your eyes on the road at all times and approximate your speed.

NOTE: DO NOT COME TO A COMPLETE STOP! THIS WILL IMPRINT PAD MATERIAL ONTO THE ROTOR, CAUSING A VIBRATION.


4. Watch for the following:
• On the 8th or 9th deceleration, there should be a distinct smell from the brakes. Light smoke caused by warm rotors may be evident during the deceleration as well.
• Also, on the 8th or 9th deceleration, some friction materials will experience “green fade”. This is a slight fading of the brakes. The fade will stabilize, but not completely go away until the brakes have cooled.
• After the break-in procedure is finished, there will be a blue tint color on the rotor vanes with a light gray film on the rotor face. The blue tint indicates the rotor has reached the proper break-in temperature and the gray film is pad material starting to transfer to the rotor face.

5. After the final deceleration, drive as much as possible without using the brakes to cool off the system. Ideally, the brakes should be allowed to cool to ambient temperature before using them again.

NOTE: DO NOT COME TO A COMPLETE STOP WHEN THE SYSTEM IS HOT AND LEAVE YOUR FOOT ON THE PEDAL. PAD MATERIAL WILL IMMEDIATELTY TRANSFER TO THE ROTOR CAUSING A VIBRATION DURING FUTURE USE.


6. After the first break-in cycle, the brakes will still not be operating at optimum capacity. A second or third heat cycle is typically necessary before the brakes really start to work optimally. This will occur during everyday use.