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How to bed in brake pads 


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 Post subject: How to bed in brake pads
Posted: Mon Feb 20, 2012 4:49 pm 
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Bedding-in of Brake Pads.

There is no Bedding-In procedure required for Bendix products that feature Titanium Stripe. Bendix General CT, Bendix 4WD and Bendix Heavy Duty all feature the Titanium Stripe. This does away with the time consuming process of bedding-in and provides instant friction to deliver positive pedal feel and sure stopping power from the moment your customers drive out of your workshop.

What does “bedding-in the brake pads” mean?

“Bedding-in” is the process of mating a new pad’s surface onto the surface brake disc rotors. Under a micro scope, the surface of the pads and rotors are uneven, with high and low points and varying surface areas (think hills and valleys). Until these parts are mated, only the peaks will be making contact, using the brakes hard without bedding-in the brakes can run the risk of over-heating and carbonising the surface of the pad. A glazed surface will likely develop, followed by unnecessary and annoying brake noise. Poor performance from newly installed brake pads is usually the result of an incorrect bed-in procedure.

The objective of the bed-in process is to create an even mating surface of the brake pad and rotor face. Uneven pad and rotor face is the number one, and almost exclusive cause of brake judder or vibration. While the impact of an uneven transfer layer is almost imperceptible at first, as the pad starts riding the high and low spots, more and more vibration will become evident.

Bedding-in fundamentals.

In general, bed-in consists of heating a brake system to its operating temperature to allow the formation of a transfer layer. The brake system is then allowed to cool without coming to rest, resulting in an even transfer layer around the rotor circumference.

In summary, the key to a successful bed-in is to bring the pads up to their operating temperature in a controlled manner and keep them there long enough to start the pad material transfer process. Different brake system designs, pad types, and driving conditions require different procedures to successfully accomplish the bed-in. The recommended procedures below should provide you with the information you need to select the bed-in procedure appropriate for your application.

Brakes are a critical safety system of a vehicle. The brake system should not be interfered with by anybody who does not have the appropriate skills and experience. Brake pads should be replaced by a qualified mechanic.

These are general instructions, for the assistance of experienced technicians. For more detailed instructions pertaining to a specific vehicle, consult the manufacturer’s service manual.

Bedding-in procedure:

When fitting new brakes without the Bendix Titanium Stripe, it is necessary to bed-in & condition the material surfaces correctly with the following manner.

1. Accelerate vehicle to 60km/h
2. Using light to moderate pedal effort reduce speed to 10km/h
3. Repeat steps 1 & 2 at least 10 times allowing 1/3 km between cycles
4. Allow pads to cool prior to returning vehicle to owner

DO NOT drive the vehicle with brake continually applied as a bed-in, as this may lead to excessive heating and loss of braking efficiently.

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