Brake Fluid Looks Murky. Why ? - MVAgusta.net
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post #1 of 19 (permalink) Old 11-28-2016, 03:27 PM Thread Starter
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Brake Fluid Looks Murky. Why ?

Why does the brake fluid have 'mini brown clouds' ?
Obvious answer seems to be that brake fluid is old but not sure why the brown clouds would appear ?


I will change to Dot4 fluid soon.
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post #2 of 19 (permalink) Old 11-28-2016, 04:01 PM
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Overdue for replacement.
The cloudy stuff is either evidence of molecular breakdown of the brake fluid, most likely due to water ingress, or someone has jizzed into your master cylinder reservoir. I admit that the second option is unlikely unless this is a Brutale.....

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post #3 of 19 (permalink) Old 11-28-2016, 04:46 PM
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Originally Posted by The_castle View Post
...or someone has jizzed into your master cylinder reservoir. I admit that the second option is unlikely unless this is a Brutale.....

Cheers, Simon


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post #4 of 19 (permalink) Old 11-28-2016, 05:15 PM Thread Starter
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Quote:
Originally Posted by The_castle View Post
Overdue for replacement.
The cloudy stuff is either evidence of molecular breakdown of the brake fluid, most likely due to water ingress, or someone has jizzed into your master cylinder reservoir. I admit that the second option is unlikely unless this is a Brutale.....
LOL, yes it's a Brutale!
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post #5 of 19 (permalink) Old 11-28-2016, 05:34 PM
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Quote:
Originally Posted by paperback View Post
LOL, yes it's a Brutale!
You're welcome.
I'm glad you got the humour in the way it was intended.
Top bloke or lady.

This is an easy fix.
What I do is use a syringe to draw out any contaminant and the majority of the brake fluid ensuring to leave a small amount covering the outlet at the bottom of the reservoir. I then use a non linting tissue to clean the interior of the reservoir. There are plenty of nooks & crannys but take your time.
Once cleaned you can begin the process of bleeding the system with new brake fluid.

Once bled, ensure that the triangular rubber gasket is sealing properly right around the reservoir and is not displaced as you put the reservoir cover in place.
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Last edited by The_castle; 11-28-2016 at 05:37 PM.
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post #6 of 19 (permalink) Old 11-28-2016, 05:41 PM
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post #7 of 19 (permalink) Old 11-28-2016, 08:28 PM Thread Starter
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Quote:
Originally Posted by The_castle View Post
You're welcome.
I'm glad you got the humour in the way it was intended.
Top bloke or lady.

This is an easy fix.
What I do is use a syringe to draw out any contaminant and the majority of the brake fluid ensuring to leave a small amount covering the outlet at the bottom of the reservoir. I then use a non linting tissue to clean the interior of the reservoir. There are plenty of nooks & crannys but take your time.
Once cleaned you can begin the process of bleeding the system with new brake fluid.

Once bled, ensure that the triangular rubber gasket is sealing properly right around the reservoir and is not displaced as you put the reservoir cover in place.
Ciao,
Dave.
Thanks for the helpful steps! I have a plastic syringe so will use that to suck the old fluid out. Then use some brake cleaner spray to clean the inside of the reservoir. Won't be surprised if this Fluid is over 10 years old
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post #8 of 19 (permalink) Old 11-28-2016, 10:49 PM
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Don't use Brake Cleaner in the reservoir or you will be sorry.Use Methylated spirits on a lint free cloth.Brake cleaner is for external use only.


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post #9 of 19 (permalink) Old 11-29-2016, 04:30 AM
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Quote:
Originally Posted by The_castle View Post
Overdue for replacement.
The cloudy stuff is either evidence of molecular breakdown of the brake fluid, most likely due to water ingress, or someone has jizzed into your master cylinder reservoir. I admit that the second option is unlikely unless this is a Brutale.....
OMG what an answer hahaha

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post #10 of 19 (permalink) Old 11-29-2016, 11:51 AM
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I bled my brakes from empty reservoir start point. It's not a big problem. Started with the left caliper and finished with the right.

joe
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