Bleeding Brakes on 1200gs

Discussion in 'GS Boxers' started by BlueBird, Aug 22, 2006.

  1. BlueBird

    BlueBird Adventurer

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    Hiya

    Can anyone help me out on how to bleed the brakes on my o5 1200gs.

    It's got abs and there are six bleed nipples on the abs/servo pump under the petrol tank.

    Is there any particular order of bleeding these or is just bleed from the caliper as normal,or is it a dealer job.:evil

    This is the last job to do to get the bike on the road after writing it off:cry and i,m busting to get go'ing:huh
    #1
  2. Slope'r

    Slope'r Retired

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    Bump

    I don't have a clue, but there must be someone here that can help you.

    PS - fill out your profile!
    #2
  3. hogmolly

    hogmolly Dude

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  4. GB

    GB . Administrator

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    This is a job that needs to be done right or you'll be left without sufficient braking power. Proceed with caution.
    #4
  5. rideLD

    rideLD The further the better!

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    The same can be said for any hydraulic braking system. :nod

    Get the service CD
    Read the Hall of Wisdom article.
    Make the funnel
    Make the piston reset tool.
    Follow the instructions
    Its really not hard to do at all.

    As far as the 6 bleed nipples go, there was a service bulletin that came out in March of this year telling the BMW techs to only bleed 1 of the 3 front circuits and 1 of the 3 rear circuits on the ABS pump. This changes 98% of the fluid in the ABS pump and 100% of fluid that has been used. This shaves about 45 minutes off the process and BMW is billing 1 less hour.(I guess they are slow:D )
    #5
  6. hogmolly

    hogmolly Dude

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    Do you know which of the three they use or does it matter?
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  7. rideLD

    rideLD The further the better!

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    Good question. All three draw from the same fluid reservoir so in theory any of them should do the trick. I would bet the leveling circuit front and back are the ones to bleed. I did all 6 of mine the old way on my last bleed job and when I got to the 2nd and 3rd nipple for the back and the front I was just bleeding out clean, new brake fluid. That got me thinking that the procedure may be redundant, wasteful and unnecessarily time consuming. I mentioned this to the local BMW tech that I sometimes ride with and he agreed. About a month later I saw him again and and he told me about the service bulletin that he had just recieved. He did not mention which nipple they are telling them to bleed but he did make a point of saying that I was right. (I love being right :D ) I might see him tomorrow night and I will try to make a point to ask him which front and rear nipple they are bleeding.

    Karl
    #7
  8. BlueBird

    BlueBird Adventurer

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    Hiya

    Thanks to all the people who posted here to enable me to bleed the front primary circuit.

    I tried to make the funnel to hold the fluid but could'nt get a leak free seal with what i had available so i just used the turkey baster to top up the fluid a little at a time,took a little bit longer but worked a treat.

    I didnt bother with taking out the brake pads and replacing with wood blanks as they were new ones anyway.

    With the servos pumping the fliud for you i'd say its even easier than bleeding normal brakes.

    Thanks everyone,:clap Jon
    #8
  9. gelandestrasse

    gelandestrasse Fidem Scit

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    I've got a 2005 R1200GS with the superior servo ABS brakes, that frankly frighten lesser riders. :evil

    In any case the bike is no longer in warranty and the brake fluid needs changed. I've ordered the funnel from McMaster Carr. I ordered the cap from the nearby BMW dealer. They gave me the "Are you sure you want to do this? We need four hours and elaborate equipment to complete the job."

    :scratch
    It doesn't look that hard. It's a bit more involved than installing a set of Russell Speed Bleeders and pumping new fluid through the system by hand, but not by much.
    #9
  10. JimVonBaden

    JimVonBaden "Cool" Aid!

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    4 hours?

    I can do it in two, from whole, to tank off and brakes done, to whole again!

    Jim :brow
    #10
  11. Anorak

    Anorak Woolf Barnato

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    Neat block diagram.
    [​IMG]
    #11
  12. gelandestrasse

    gelandestrasse Fidem Scit

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    You aren't getting paid to do it by the hour. :D
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  13. Anorak

    Anorak Woolf Barnato

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    Nor is he including the bleed test with the GT1 or a test ride.
    #13
  14. marchyman

    marchyman DR and GS

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    Maybe Jim's just fast. I'm not.

    Last time I helped a friend do the job we took about 4 - 4 1/2 hours. That did not include his time to remove/restore plastic (it was an RT) nor did it include the time he took to remove the tank. We bled both wheel circuits and all 6 bleed points of the control circuits, two of them twice. I understand some only bleed 2 points of the control circuits. That would have saved some time. But we weren't in any hurry, having scheduled most of a day to get the job done.

    No GT-1 available to do the checking (I'm hoping that someday the GS-911 will do that job). The bike owner is happy with the results.

    // marc
    #14
  15. Rick Lee

    Rick Lee Long timer

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    This is another reason I have no desire for ABS. My non-ABS bike brakes just fine and bleeds are a cinch.
    #15
  16. Anorak

    Anorak Woolf Barnato

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    A GS is a lot easier than an RT. The RT has a lot more bodywork to remove to even get to the tank. Once you're actually at the module, might as well bleed all six bleeders because it's not going to add more than five minutes.

    Now, a CHP 1150 RT-P, thats interesting. First you unfasten the radio transmitter in the rear box to access the seat latch. Next, the crashbars come off, then the auxiliary battery and finally you can remove the bodywork.
    #16
  17. marchyman

    marchyman DR and GS

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    Rick, you know not of what you write. :deal The "take's long time to bleed" issue is due to the servo assist on the early models, not ABS per se. The current model of ABS bleeds just like your non ABS bike.

    // marc
    #17
  18. marchyman

    marchyman DR and GS

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    Yep, which is why I had him remove the plastic and tank before I got there. :evil I think removing plastic is a large part of the reason I own a GS. :deal

    A friend has an RTP for his funeral escort side job. I wonder if his as much of a pain as the real thing. I'll have to ask some day.

    // marc
    #18
  19. Rick Lee

    Rick Lee Long timer

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    I know. But the fussiness and cost of repair of the ABS bikes scares me away. I've never had a problem bleeding the brakes in my cars and never had an ABS issue in any of them either. With bikes it's just too expensive for too little benefit, IMHO.
    #19
  20. gelandestrasse

    gelandestrasse Fidem Scit

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    I've been riding street bikes since 1978 and I think ABS is a tremendous benefit. I wouldn't buy a motorcycle (or an automobile for that matter) without ABS.
    #20