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post #1 of 10 (permalink) Old 05-10-2016, 07:44 PM Thread Starter
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Brake Fluid is a Milky White Color

My neighbor has an 05' Road King and just had to replace his rear tire. After he did he noticed that he kept having to pump up the pressure for the rear brakes every time he used them. He said whenever he gets them pumped up they hold and that they don't leak down as long as he holds his foot on the break. We cannot find any leaks anywhere and he has bleed them and replaced the fluid twice with no luck at solving the issue. The brake fluid starts getting this white milky look to it after he uses it for a while. I think it is getting air in it somehow and the tiny air bubbles are what is giving it that look. Anyone have any ideas what may be going on?

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post #2 of 10 (permalink) Old 05-10-2016, 08:08 PM
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My neighbor has an 05' Road King and just had to replace his rear tire. After he did he noticed that he kept having to pump up the pressure for the rear brakes every time he used them. He said whenever he gets them pumped up they hold and that they don't leak down as long as he holds his foot on the break. We cannot find any leaks anywhere and he has bleed them and replaced the fluid twice with no luck at solving the issue. The brake fluid starts getting this white milky look to it after he uses it for a while. I think it is getting air in it somehow and the tiny air bubbles are what is giving it that look. Anyone have any ideas what may be going on?
Time to rebuild the master cylinder. Did he use dot 5 when he bleed the brakes ?

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post #3 of 10 (permalink) Old 05-10-2016, 08:25 PM
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Harley brakes are a sumbitch to bleed. Buy or borrow a MityVac and vacuum bleed them before you start rebuilding components. Might cure the problem.
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post #4 of 10 (permalink) Old 05-10-2016, 08:47 PM
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I would definitely try pressure bleeding them before you rebuild or replace anything. Unless of course the wrong brake fluid or something other than brake fluid was used. If something other than brake fluid was used, say oil then start rebuilding or replacing because the seals and o-rings will deteriorate. I've been a mechanic in the auto industry for most of my life and you'll be amazed how many times people have put motor oil in the master cylinder

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post #5 of 10 (permalink) Old 05-10-2016, 08:47 PM
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My He said whenever he gets them pumped up they hold and that they don't leak down as long as he holds his foot on the break. ?
So you got peddle? Or do you have to pump it to gain again, still air in then, sounds like not bleeding em right

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post #6 of 10 (permalink) Old 05-10-2016, 08:52 PM Thread Starter
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So you got peddle? Or do you have to pump it to gain again, still air in then, sounds like not bleeding em right

He said it pumps up and holds but when he lets off and rides for a while he has to pump all over again.


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post #7 of 10 (permalink) Old 05-10-2016, 08:54 PM Thread Starter
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I'll ask him tomorrow which fluid he used to see if that's the issue. He's been around bikes for a while so I did assume he knew what fluid to put in but I will double check.


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post #8 of 10 (permalink) Old 05-10-2016, 09:17 PM
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He said it pumps up and holds but when he lets off and rides for a while he has to pump all over again.


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There's still air in there, pump up hold down bleed (burp) air close repeat to near full peddle, keeping fluid head pressure right
Use tubing on bleeder?
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post #9 of 10 (permalink) Old 05-11-2016, 12:32 AM
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milky white is moisture , a rebuild will be in order , as we all know moisture will create rust , brake fluid is very hydroscopic ..
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post #10 of 10 (permalink) Old 05-11-2016, 05:39 AM Thread Starter
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There's still air in there, pump up hold down bleed (burp) air close repeat to near full peddle, keeping fluid head pressure right

Use tubing on bleeder?

Yes he used tubing but it was just one of those little economical one person bleeder kits.


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