Forum Discussion
Itasca55
Aug 17, 2015Explorer
holstein13 wrote:
In a recent thread, we were discussing brake glazing and I was surprised to see that the term was not widely understood or defined so I looked it up. Here's what I found:
What causes brake pad glazing?
Brake pad glazing is caused when the brake pad friction material is overheated. This results in crystallized friction material on the pad surface and the brake disc. Typical symptoms of glazed brake pads include: Poor stopping performance, vibration or brake judder, and cracks or fissures in the brake pad material. Pad glazing is typically caused by operating the brake pads at a temperature above the specified temperature range of the friction material or not properly following the 'Bedding-in' instructions for the brake pads. Always follow the manufacturers brake pad bedding-in instructions and use a brake pad that has a temperature range that is sufficient for its intended use.
What can happen to my brake pads if not bedded properly?
Proper break-in will assure that small amounts of heat are introduced to the brake pad. Brake pads that are brought up to temperature too fast and not properly allowed to cool down may quickly become glazed and not perform as originally intended. The pad’s rubbing surface reaches extreme heat levels during racing use. The surface needs slow temperature increases to help prepare the pad. Large amounts of heat all at one time can cause the brake pad rubbing surface to become somewhat liquified and coat the pad surface with a glaze. This will dramatically reduce stopping performance as certain ingredients in the friction compound breakdown and cause glazing of the rubbing surface of the brake pad.
First off, does everyone agree with the above text? If so, then what's the best way to prevent glazing while driving a motorhome? For example, would constant use of the Jake brake help the situation? Do we need to bed in our brakes when we get a new MH? Finally, does the rotor / drum glaze differently from the brake pads? Or is it the same thing?
Here are my findings about brakes. If you put on ceramic brake pads it tares up the rotors more ( good braking ) . meaning if rotors not cracked or colored and not surging . I dont even turn them :)just put pads on . every time I took rotors in to have them turned they always started to surge in under 10,000 miles . did brakes like this on motorhome had 150,000 miles on it . never turned the front rotors ever . and yes it was drove through mountains all over . only once pads got glazed pads that was before I put ceramic ones on . never had any problems after ceramic pads . but a note ceramic ones do heat up faster in extreme conditions . down shifting is keey . This is just my findings on 21 foot van style . But this is how Im doing brakes on my 27ft class a now also no problems yet. theres my 2 cents .
Itasca55
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