Clutch not fully disengaging

Palle · Feb 7, 2017

Quote.I would never be worried about putting DOT fluid into a mineral oil system ever as long as it was 4 or 5.1. I however would be worried about placing a mineral oil into a DOT system.

Have you tested using dot in the maguras?

Rainerio · Feb 7, 2017

Yes a dealer did it same result as the brake but only had to replace cover seal. Only put what the manuals/covers say.... at least for 09 to 12

Bilga · Feb 8, 2017

Thanks for all the clarifications guys, hopefully this thread can be used as a future archive for others who may need some clarifications.

FE350 · Feb 8, 2017

Rainerio said:
Yes a dealer did it same result as the brake but only had to replace cover seal. Only put what the manuals/covers say.... at least for 09 to 12

People always think mineral oil = harmless and DOT Brake fluid = evil, not the case at all. Mineral Oil will also damage certain materials, just different ones. Natural Rubber O-rings are not a good idea with mineral oil because they swell. Mineral oil is also incompatible with EPDM synthetic rubber seals (which to my knowledge is one of the main reasons that some brake manufacturers choose DOT fluid over mineral oil).

Yes unless you can tell what rubber the manufacture used when making the brake components, always use what they say. I would say only use what the manual says in all years. Also never swap years on seals unless you are sure as a brake failure is a serious issue. If ya cant stop then don't start....

jon andersson · Feb 9, 2017

I remember know that I was surprised to see that my friends 2014 350 had dot fluid for clutch as the 70 degrees use mineral. But much more convenient that they made both use the same fluid!

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Clutch not fully disengaging

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