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Brake Fluid Question
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Brake Fluid Question - April 1, 2007, 09:36 PM

So I just got my bike out for the Spring and I noticed that the brake fluid in the reservoir is pretty black on top of a little 'clean' fluid. My question is... do I need to bleed the brakes and all that jazz to clean that out or is there a simpler way to get clean brake fluid up in there? Any "accurate" advise would be greatly appreciated! If bleeding is necessary, anyone nearby that's knowledgeable and can help a brotha out? lol
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April 1, 2007, 09:48 PM

You can buy a nice little vaccuum tool that will suck the brake fluid out of the reservoir. Do that, then pour clean brake fluid into the reservoir. Drain the brake fluid out the bottom (have a friend keep adding to the reservoir) until all the icky fluid has cleared the system (flush the lines in case some gunk is farther down, also). No painful "bleeding" of the brakes. No air bubbles. No mess, and all that's left is clean brake fluid.


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April 2, 2007, 06:55 AM

Quote:
Originally Posted by Kat
You can buy a nice little vaccuum tool that will suck the brake fluid out of the reservoir. Do that, then pour clean brake fluid into the reservoir. Drain the brake fluid out the bottom (have a friend keep adding to the reservoir) until all the icky fluid has cleared the system (flush the lines in case some gunk is farther down, also). No painful "bleeding" of the brakes. No air bubbles. No mess, and all that's left is clean brake fluid.
No mess??? The real "icky" fluid is behind the pistons. At the least you should remove the calipers and compress the pistons with the bleeder open and then properly bleed your brakes. Basically what Kat is describing is a gravity bleed. Somepeople reccomend replace the brake fluid every year because it readily absorbs water.
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April 2, 2007, 08:27 AM

Quote:
Originally Posted by Space
No mess??? The real "icky" fluid is behind the pistons. At the least you should remove the calipers and compress the pistons with the bleeder open and then properly bleed your brakes. Basically what Kat is describing is a gravity bleed. Somepeople reccomend replace the brake fluid every year because it readily absorbs water.
Well, the fluid is definitely in need of being replaced because I haven't replaced it since I bought the bike. I looked online and found a vacuum tool and bleeder kit...would that do the trick? Once I have the right tools, is the 'bleeding' process hard?
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April 2, 2007, 08:33 AM

Hey if you have never done brake bleeding before please get someone to show you!!! This is something not to mess around with. You can pm me and we can hook up and I will show you. The last thing you want to do is have a front brake failure and crash.


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April 2, 2007, 08:48 AM

Quote:
Originally Posted by titanium636
Well, the fluid is definitely in need of being replaced because I haven't replaced it since I bought the bike. I looked online and found a vacuum tool and bleeder kit...would that do the trick? Once I have the right tools, is the 'bleeding' process hard?
Waste of money. If you are looking to make it easier look for a produce called "speed Bleeders". You really only need some .25" i.d. hose, break fluid and someone to squeeze the lever.

To bleed them after you compress the pistons. Compress Pistons on both calipers before bleedeing. DO NOT SQUEEZE BRAKE LEVER WITH CALIPER AND PADS REMOVED. USE ONLY AN UNOPENED CAN OF THE SPECIFIED FLUID.

1. re install pads in the locations they came from.
2. install calipers
3. attach hose to bleed valve
4. make sure fluid is full DO NOT SPILL FLUID ON PAINT
5. have friend squeeze lever while you losen bleeders valve
6. tighten bleeder valve and release lever
7. repeat 5 & 6 several times making sure fluid level does not drop too low
8. repeat process for all calipers
9. top off fluid and test lever pull then test ride.

Should take about an hour to do the entire bike.
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April 2, 2007, 08:49 AM

Quote:
Originally Posted by dodge131
Hey if you have never done brake bleeding before please get someone to show you!!! This is something not to mess around with. You can pm me and we can hook up and I will show you. The last thing you want to do is have a front brake failure and crash.
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April 2, 2007, 10:45 AM

Quote:
Originally Posted by dodge131
Hey if you have never done brake bleeding before please get someone to show you!!! This is something not to mess around with. You can pm me and we can hook up and I will show you. The last thing you want to do is have a front brake failure and crash.
Front Brake Failure = NOT GOOD!
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April 4, 2007, 05:16 PM

Defiantly have somebody else there to help you, like everybody else said it isn’t a terribly difficult process but it you try and jerry rig it and get a few air bubbles in the line, your going to pay for it in the end and if you’re really lucky all you will have to do is bleed them all over again the proper way. I learned the hard way that air in the lines is a bad thing but lucky it was on an MX bike which was quite forgiving.


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