Gloop in Brake Calipers
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Tourer
Joined: Jan 2012
Posts: 498
Likes: 25
From: Hampshire, UK
Gloop in Brake Calipers
Afternoon all,
Just been servicing the calipers on my old man's 2005 Road King and noticed some weird yellow muck in the bores - any ideas?
I don't believe anyone has mixed DOT5 as this is a bike with DOT4 master cylinder lids etc, so will have been DOT4 from the get go...?
Just been servicing the calipers on my old man's 2005 Road King and noticed some weird yellow muck in the bores - any ideas?
I don't believe anyone has mixed DOT5 as this is a bike with DOT4 master cylinder lids etc, so will have been DOT4 from the get go...?
Last edited by roundy; Oct 18, 2017 at 09:53 AM.
Road Warrior
Joined: Jul 2006
Posts: 1,302
Likes: 61
From: Near YVR
What are the chance of water in the system?
I am not much of a wrench, but have never seen goop like that in my brakes.
Just flushed the system on the 02 Ultra this summer and the fluid was darker in color and Was done 4 years ago the last time around 35000 miles ago.
Look forward to more details and further opinions.
Rob
I am not much of a wrench, but have never seen goop like that in my brakes.
Just flushed the system on the 02 Ultra this summer and the fluid was darker in color and Was done 4 years ago the last time around 35000 miles ago.
Look forward to more details and further opinions.
Rob
Outstanding HDF Member
Joined: May 2015
Posts: 2,172
Likes: 377
From: Georgia
DOT4 absorbs moisture, as do all brake fluids except 5. Brake systems are not completely sealed systems. At points like caliper to seal junction you can get some emulsivacation that can build up.
As said, flushing the brake fluid every couple of years will go a long way to preventing that.
As said, flushing the brake fluid every couple of years will go a long way to preventing that.
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duoglider
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