Any disk equipped, especially Volvo's - PTFE in brake grease

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Sat 21 Apr 2018 04:31
Any disk equipped, especially Volvo's - PTFE in brake grease - edlithgow

www.amazon.com/Genuine-Volvo-1161688-Silicone-Grea...I

Came across this. Says its got PTFE in it.

..This is interesting to me because I used PTFE tape on my slide pins (along with silicone grease bought in Japan) but thought I might not do it next time I strip them in case the brakes get very hot again (one was seized) and break it down to fluoric acid, which is famously nasty stuff.

Wikipedia has "Pyrolysis of PTFE is detectable at 200 °C...it begins to deteriorate after the temperature of cookware reaches about 260 °C (500 °F), and decomposes above 350 °C "

Seems like a seized brake could perhaps get in that ball park. A bit lof poking around on the internyet suggests that brakes in competition use could reach 500C, but if Volvo aren't worried.....

...OTOH, they ARE Chinese now.

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Fri 18 May 2018 13:02
Any disk equipped, especially Volvo's - PTFE in brake grease - Cyd

I used to use copper grease (a well known make) and found I was forever suffering sticky pins leading to uneven pad wear.

Since I switched to using a good quality moly loaded grease (Castrol MS3 actually), I've had a massive reduction in the problem. I also stopped lubing the contact face between backing plate and carrier. This has helped too. (I got that advice from a Brakes Engineer)

Like this: https://youtu.be/I2bjrobr1T4

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Fri 18 May 2018 16:55
Any disk equipped, especially Volvo's - PTFE in brake grease - gordonbennet

I have a litre tub of the correct red brake grease, should see me out.

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