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Old 03-24-11, 11:43 AM   #1
sonnetg
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Hydraulic fluid/Brake maintenance questions..

Hello folks,

I have recently purchased a MTB with Avid Juicy Three hydraulic brakes. This "Hrydro" braking system is completely new to me. Can someone fill me up and what sort of yearly maintenance I can expect to do this "Hydraulic" braking system ?

I normally don't ride my MTB a whole lot; maybe once a month at most. If that is the case do I need to replace the Brake Fluid yearly? How about bleeding and what not? I am assuming the brake pads will last years given how infrequently I ride the MTB?


Also, are there any sites that shows how to completely overhaul the Hydraulic Brakes?

I would really appreciate any advice. I really don't want to take it to the LBS just for yearly brake maintenance. I have all the tools I need for yearly tuneups, which i perform myself. ( This MTB is my 4th bike :-)

Thank you
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Old 03-24-11, 06:47 PM   #2
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You didn't find material on the manufacturer's site? Last i checked there were videos and texts online.
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Old 03-24-11, 07:20 PM   #3
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Nope. This is all I found: http://www.sram.com/avid/products/ju...lic-disc-brake

I was able to download a pdf manual, but it didn't mention anything about replacing or refilling fluids.
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Old 03-24-11, 07:31 PM   #4
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Here's the manual. It does not mention anything on cleaning and general maintenance.

http://www.sram.com/_media/techdocs/95-5013-109-000.pdf

I usually hose it down and store the bike in my store room after each ride. I make sure all the grime and muck is cleaned up after each ride. I have no way of verifying the fluid. If after a year, the hydraulic brakes work fine, do i have to be concerned on replacing or bleeding the fluid? The LBS did recommend to replace the fluid every year, but i highly doubt i would have to.

Anyone here have the same old brake fluid working for more than a year? I guess that's all i need to know.
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Old 03-24-11, 08:02 PM   #5
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Dont sweat it. Service them when you feel that they need it.
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Old 03-24-11, 08:14 PM   #6
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Dont sweat it. Service them when you feel that they need it.
Yup. It would be nice to hear some real life experiences from MTB folks at this forum, but, i know.. given few occasional rides i do with the MTB, i would have no need to replace the oil yearly. The oil does not expire, but it could gather some moisture overtime.

Anyhoo...only time will tell how it holds up.

Thanks.

Last edited by sonnetg; 03-24-11 at 08:29 PM.
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Old 03-25-11, 05:27 AM   #7
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It would be nice to hear some real life experiences from MTB folks at this forum
this one time i had some brakes i didn't bleed for six years and they still worked.

is that better? it's kind of hard to tell an interesting story about not bleeding your brakes.
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Old 03-25-11, 07:39 AM   #8
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this one time i had some brakes i didn't bleed for six years and they still worked.

is that better? it's kind of hard to tell an interesting story about not bleeding your brakes.

That's interesting enough. As long as my brakes don't degrade or leak air, I wont have to bother with bleeding or unnecessarily replace the brake fluid each year. Sometimes i get the feeling the LBS would love you to visit them every month of maintenance!

Thanks for the vote of confidence.
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Old 03-25-11, 10:49 AM   #9
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The oil does not expire, but it could gather some moisture overtime.
A bicycle's hydraulic brake system is an unvented, completely-sealed circuit (unlike your car, which usually has a vented master cyclinder); so, without exposure to air, there is really no way the fluid could absorb moisture.
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