How should the newly changed brake pads and brake discs run in?

Posted by Ng on Wednesday 25 December 2019

Kaidon Brake, 2019 Dececmber

As we all know, the brake pads and brake discs will wear out after a period of use. When the wear reaches the limit, they need to be replaced. After replacing the new brake pads and brake discs, running-in is a crucial process, which not only affects the safety of driving but also affects the comfort of braking.

Why do we need to run in?

Full running-in is the key to the best performance of the braking system

When we put on new brake pads and brake discs because their contact surfaces have not reached the optimal state, which will affect the braking performance, the so-called "unable to stop" situation occurs.

Proper running in for comfortable braking

Run-in is to make the surface of the disc form a stable compound layer. If the running-in is not performed correctly, the compound layer formed on the surface will be uneven, which will cause braking vibration. Many of the so-called "distortion" of the brake discs are due to the uneven surface of the new brake pads.

Therefore, be sure to run in after replacement, to better performance and ensure comfortable braking.

So, how to run in?

Right section

Before running in, we need to find a suitable road section and find a place with good road conditions and fewer vehicles. This is to better grasp the speed and ensure safety.

Low-speed running-in

Accelerate to 60 km / h, and lightly brake the brakes to reduce the vehicle speed to about 10-20 km / h with moderate braking. It is not necessary to keep an eye on the speedometer at this time, just keep your eyes on the road to ensure that you can notice the road situation at any time.

Free cooling

Release the brakes and travel a few kilometers to allow the brake pads to cool naturally. Do not brake until the vehicle comes to a complete stop, otherwise, the material of the brake pads will adhere to the brake disc, which will cause the brake to vibrate.

Repeated break-in

For better running-in, repeat the above steps at least 10 times. During the running-in process, the driver should be able to smell the volatile phenolic resin. Don't worry, phenolic resin will not be harmful to the human body after high temperatures.

Point brake

It should be noted that the running-in method of the new brake pads is to use fractional point brakes for braking as much as possible, and do not use emergency braking before running in.

Running-in mileage

After the above initial running-in is completed, the brake pads still need to run through the running-in period of hundreds of kilometers with the brake disc to achieve the best performance. Before that, drive carefully to prevent accidents.

The replacement of the brake pads is the same as the replacement of the oil and the three filters. As a regular item, most owners understand it, but many owners do not know when the brake pads and brake discs need to be replaced together.

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