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 Brake fluid reservoir vent.

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Silver Wing Rider
Silver Wing Rider

Number of posts : 419
Age : 80
Location : Mt Prospect IL 30 miles west of Chicago
Points : 3445
Registration date : 2010-03-03

PostSubject: Brake fluid reservoir vent.   Sat Aug 20, 2016 9:11 pm

From time to time the question has come up weather the brake fluid reservoir is vented. I think this picture will show how it is vented to the atmosphere.  Howard

Last edited by NWSSC on Fri Aug 26, 2016 8:53 pm; edited 1 time in total
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Silver Wing Guru
Silver Wing Guru

Number of posts : 2137
Age : 75
Location : Medford, Oregon
Points : 5450
Registration date : 2009-07-17

PostSubject: Re: Brake fluid reservoir vent.   Sat Aug 20, 2016 11:58 pm

Your link doesn't work unless you have a Google account which is something I don't have or want.

I'd argue that the Silverwing as well as the Goldwing do not have direct atmospheric venting. There is a flexible diaphragm on top of the fluid that prevents contact between the brake fluid and the air. The diaphragm follows the surface of the fluid in the reservoir as it drops due to brake pad wear with out allowing vacuum to built up on the fluid in the reservoir.

The reason is that brake fluid is highly hygroscopic. It will absorb moisture from the air. Most service manuals will say only to use fluid from unopened containers of brake fluid to insure no moisture is introduced into the system. Water will cause corrosion in the brake system.,_JPN,_VIN%23_JH2PF014-7K400001_TO_JH2PF014-7K499999/FRONT_BRAKE_MASTER_CYLINDER_(FSC600A)/FSC600A-07-JPN-AC/2Y14MCT601AMCTAF0400AD
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The Bern
Silver Wing Expert
Silver Wing Expert

Number of posts : 527
Location : Telford, UK
Points : 1851
Registration date : 2014-11-20

PostSubject: Re: Brake fluid reservoir vent.   Sun Aug 21, 2016 6:44 am

exavid wrote:
Your link doesn't work unless you have a Google account which is something I don't have or want.

I have a google account & it doesn't work for me Neutral
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Brake fluid reservoir vent.
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