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  1. #1
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    how do you guys/gals bleed your shimano brakes?

    Time to bleed my shimano slx m666.

    I've seen the funnel method... but the kit I ordered has the syringes with the fitting to screw into the lever.

    What method would you use with two syringes? Just take the plunger out of the top and turn it into a funnel?

    Bleed from top to bottom and then bottom to top?
    El Guapoooooooo

  2. #2
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    Shimano Disc Brake Bleed Kit 2012 and Newer - Bleed Bicycles, LLC

    That is the kit I bought. In description it says bleed from caliper then bleed from lever.

    Is it that simple?
    El Guapoooooooo

  3. #3
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    It doesn't really matter what way you try to bleed Shimano brakes, it will work! Even if you end up with air in there just sit the brakes with the lever up high and the bubbles will work up and out. Then just top up and you're good to go. They're so easy to deal with it's ridiculous.

  4. #4
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    Quote Originally Posted by y0bailey View Post
    Time to bleed my shimano slx m666.

    I've seen the funnel method... but the kit I ordered has the syringes with the fitting to screw into the lever.

    What method would you use with two syringes? Just take the plunger out of the top and turn it into a funnel?

    Bleed from top to bottom and then bottom to top?

    I bought the funnel. $9.99. Follow instruction on it. Easy.

    https://m.jensonusa.com/Shimano-Disc...-FunnelStopper

  5. #5
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    Also the cap from a Stan's 2 oz. bottle works too. Cheaper than the funnel, and you get free Stan's with it. However of course it doesn't include the fancy O-ring drip mitigation assembly (can substitute with ballpoint pen). I have used this to swap fluid, but never actually needed to 'bleed' in ~1.5 years.
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  6. #6
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    Quote Originally Posted by y0bailey View Post
    Shimano Disc Brake Bleed Kit 2012 and Newer - Bleed Bicycles, LLC

    That is the kit I bought. In description it says bleed from caliper then bleed from lever.

    Is it that simple?
    It's that simple. I used this kit on my XT's after shortening the hoses and it works great...
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  7. #7
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    Quote Originally Posted by mopartodd View Post
    It's that simple. I used this kit on my XT's after shortening the hoses and it works great...
    Great to know. Just fill me in on the details here/critique my plan.

    1) Filled bottom syringe with ~20cc of fluid
    2) Attach both syringes
    3) Open caliper bleed port and force fluid into the syringe on the lever (bleed from caliper to lever).
    4) Close bleed port.
    5) Put fresh/new fluid in lever syringe, 20cc, reinstall
    6) Force fluid from lever to caliper
    7) Do the squeeze lever/quick open caliper port for half a second a few times.
    8) Tighten caliper port
    9) Done.

    That about explain it?
    El Guapoooooooo

  8. #8
    thecentralscrutinizer
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    What I did.
    1. Put the syringe with small amount of fluid on at the lever.
    2. Put syringe with fluid on caliper.
    3. Open bleed port, turn the syringe so the plunger is vertical and higher than the bleed port, pull on the plunger for vacuum to remove bubbles, and inject fluid, close port.
    4. Pull a vacuum with lever plunger until bubbles stop.
    5. Put slight pressure on lever plunger, ease off pressure and remove syringe, replace port cap.

    Too, here's a video that is quick and simple. You can use one syringe open instead of the funnel at the lever.

    https://www.youtube.com/watch?v=DsqlEYJeLQU
    Last edited by mopartodd; 4 Weeks Ago at 12:58 PM. Reason: add video
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  9. #9
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    Has anyone come up with a method of bleeding Shimano brakes that doesn't work??!

  10. #10
    thecentralscrutinizer
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    As long as you work from the bottom up, I don't know how you can mess it up.
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  11. #11
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    how do you guys/gals bleed your shimano brakes?

    I need to order one of those bleed kits, that looks very easy.


    My current bike--2014 Trek Fuel EX 8 29er.

  12. #12
    Just a flesh wound
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    It is simple.

    1- Remove pads from Caliper
    2- Remove caliper from Frame
    3- Attach hose and bag to Bleed Screw on Caliper
    4- Open Reservoir on Brake Lever
    5- Pull Lever tight and secure with a large rubber band. This allows the lever to close all the way when..
    6- Open Bleed Screw.
    7- Close Bleed Screw
    8- Remove rubber band and open the brake lever
    9- Add fluid to reservoir as necessary and repeat until bleed is complete.

    If you hold the caliper in a position that places the bleed screw at the top of the system, you can tap the line and caliper body to easily remove any and all bubbles.

    This is my method for doing it solo. If you have company, you can get them to pull the lever and add fluid. It has always been easy and worked without any issues.

    Good Luck!
    My name is Chris and I ride a Prophet 650b with a Lefty.

  13. #13
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    Quote Originally Posted by Prophet Julio View Post
    It is simple.

    1- Remove pads from Caliper
    2- Remove caliper from Frame
    3- Attach hose and bag to Bleed Screw on Caliper
    4- Open Reservoir on Brake Lever
    5- Pull Lever tight and secure with a large rubber band. This allows the lever to close all the way when..
    6- Open Bleed Screw.
    7- Close Bleed Screw
    8- Remove rubber band and open the brake lever
    9- Add fluid to reservoir as necessary and repeat until bleed is complete.

    If you hold the caliper in a position that places the bleed screw at the top of the system, you can tap the line and caliper body to easily remove any and all bubbles.

    This is my method for doing it solo. If you have company, you can get them to pull the lever and add fluid. It has always been easy and worked without any issues.

    Good Luck!
    so no syringe right? I've got older XT's and don't remember ever using a syringe, only adding from the rezy.

  14. #14
    Just a flesh wound
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    No syringe. Just a 8" plastic hose for the bleed nipple to guide the fluid into a plastic bag. No special tools needed. Add at the reservoir. The nice thing about the Shimano Mineral Oil, or Magura Mineral Oil is that you don't need to create a vacuum to get the air out. That pia process is for DOT Brake Fluids. I switch from Magura to Shimano fluids and back without any issues. Actually the different colors make it easy to know when the old fluid is gone!
    My name is Chris and I ride a Prophet 650b with a Lefty.

  15. #15
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    I need help; I installed a new brake and performed the bleeding according to shimano instructions, and still nothing. The lever pulls all the way to the bar with no resistance or piston movement. What am I missing?

  16. #16
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    Quote Originally Posted by nlm101 View Post
    I need help; I installed a new brake and performed the bleeding according to shimano instructions, and still nothing. The lever pulls all the way to the bar with no resistance or piston movement. What am I missing?
    I would say 1 of 2 things. Something going wrong during your bleeding procedure and you are letting air in and/or not getting it all out, OR you have a leak somewhere in the system letting air in/oil out.

    Look around and see what you find.
    El Guapoooooooo

  17. #17
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    Maybe they are m666, the brake of the beast!

  18. #18
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    Yeah I was about to perform the exorcism, but I went though the whole routine again with the bike a slightly higher angle in the stand, and it finally worked. Thanks

  19. #19
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    Quote Originally Posted by nlm101 View Post
    I went though the whole routine again with the bike a slightly higher angle in the stand, and it finally worked.
    You just had air in it. If it's working correctly now, remove the cap/lid of the fluid reservoir and fill it to the brim with oil and you're good. If you don't do that there may still be air in the reservoir that'll get back into the line later.

  20. #20
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    I think bleeding Shimano brakes is way over-thought out. I bleed them just as I would vehicle brakes and works flawless. Levers down to caliper. Did it the other way too, caliper up, works the same. But doing both directions for one bleed is a waste of effort and fluid imho.

    Gotta love Shimano keeping it simple, easy and not over thinking the brake system.
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  21. #21
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    this is how your supposed to do it

    https://www.youtube.com/watch?v=9ZYmW8i8TWQ
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  22. #22
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    What's the point of the hose with the bag? I've never understood why you wouldn't just keep the hose with the syringe attached a the caliper and gently pull on it to achieve the same thing.

  23. #23
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    I watched the you tube video, then purchased what I thought I needed to do the job. Once it arrived I watched the video again and realized I need more so I bought that and fianlly bleed the brakes per the instructions. Worked great.
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  24. #24
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    Quote Originally Posted by jm2e View Post
    What's the point of the hose with the bag? I've never understood why you wouldn't just keep the hose with the syringe attached a the caliper and gently pull on it to achieve the same thing.
    maybe you could suck air into the line.. idk. im still using Avids.. sigh
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  25. #25
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    I've watched several videos on bleeding Shimano brakes and that was without question the most thorough and comprehensive.
    I like how he included the step at the beginning about adjusting lever throw/brake point before you begin. Most people miss that step.

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