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Brake / Clutch Fluid Reservoir Diaphragm
Posted: Mon Jul 12, 2021 6:37 am
by Our Gee
This is just a general query and not related to a problem, so here goes. Does anyone know what is the purpose of the Brake and Clutch Reservoir "Diaphragm". Apart from forming a gasket seal between the metal cap and the plastic reservoir is there another purpose. The shape does seem to be very complicated if indeed it is just a gasket and why is there always what looks like water condensation droplets present ?. Thanks.
Re: Brake / Clutch Fluid Reservoir Diaphragm
Posted: Mon Jul 12, 2021 11:43 am
by sakm
You have just answered your own question
Without that diaphragm where do you think that water is going to go? Straight in to the brake fluid
Re: Brake / Clutch Fluid Reservoir Diaphragm
Posted: Mon Jul 12, 2021 11:58 am
by Sullivj
It's supposed to keep the water out, but mine failed and the fluid became 'murky'.
I had the reservoir cleaned out, fluid replaced and flushed through and a new diaphragm and cap fitted.
The new diaphragm was firmer than the old one. Maybe yours would also benefit from replacement.