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Thread: Bleeding Brakes 1999 R1100RT

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    Bleeding Brakes 1999 R1100RT

    I installed new front brake lines and I am ready to bleed the brakes. What, if I may ask, is the strange looking plug in the right front caliper where the bleed screw is on the left one? That being said, is bleeding done through the left caliper only?

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    Quote Originally Posted by EMSimon View Post
    I installed new front brake lines and I am ready to bleed the brakes. What, if I may ask, is the strange looking plug in the right front caliper where the bleed screw is on the left one? That being said, is bleeding done through the left caliper only?
    That should be a bleeder in the right front caliper as well.
    If it was replaced with a bolt at some point in history? ick.
    Mine (still) has little rubber caps that keep the grime out of the bleeders.
    Might wanna pick those up as well when you go get a replacement bleeder.

    In your case you are chasing air out today.
    But once a year or so you also want to bleed out the older fluid sitting in the caliper where it gets hot.
    The fluid absorbs punishment (heat and moisture) by turning brown.

    Did you replace the line from the master cylinder?
    If so it may occur to you that that air has to go through the ABS towers to bleed out.
    It has been my experience that this air will come all the way out through the bleeders at the calipers, you don't need access to the bleeders on top of the towers (which are under the fuel tank).
    Of course you will waste about a quart of brake fluid doing it.

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    Thanks, Scott. I am familiar with the maintenance requirements of brake systems and I also had the same experience on other bikes as you had as far as bleeding the ABS system is concerned. This strange plug has me stomped, however. It is not just a bolt. I have to take a picture and see if anybdy knows what it is.

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    Here is a picture of the "thing"
    Attached Images Attached Images

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    beemerFROG derost's Avatar
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    I'm not sure what that is... but does anyone hear a ticking sound??
    -Ride Safe & Avoid Anyone On The Phone-
    **2000 R1100RT (Bullfrog), 1976 R90/6 (Tadpole)**
    beemerFROG a.k.a. Douglas E. Rost
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    A Google Image Search for "bleeder plug" led me here: http://www.spieglerusa.com/dry-brake...sconnect-3.htm
    2000 R1100RT / 1987 K75C (RIP) / Santa Clarita, CA

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    It seems like all the Oilhead experts are still on the road back from the National.
    Thinking someone may have messed up the caliper and I may need a new one, I looked at some at ebay and all of the ones from the same time-frame (98-02) have this plug. So it is definitely an OE BMW part

    Have you guys who responded, looked at your 2000RT, whether it has the same plug?

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    RK Ryder
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    Quote Originally Posted by EMSimon View Post
    I looked at some at ebay and all of the ones from the same time-frame (98-02) have this plug. So it is definitely an OE BMW part Have you guys who responded, looked at your 2000RT, whether it has the same plug?
    Just checked my '98 and it doesn't have that part.
    Paul
    Retired and riding my RTs, the '87 K100 & the '98 R1100 !
    Treasurer of the Forest City Motorrad Club #159
    Knights of the Roundel #333

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    Quote Originally Posted by EMSimon View Post
    It seems like all the Oilhead experts are still on the road back from the National.
    Thinking someone may have messed up the caliper and I may need a new one, I looked at some at ebay and all of the ones from the same time-frame (98-02) have this plug. So it is definitely an OE BMW part

    Have you guys who responded, looked at your 2000RT, whether it has the same plug?
    My 98 RT does not have that.
    I have no idea what it is.
    Did you try giving it a yank to see if isn't just a dust cap?

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    Quote Originally Posted by JamesInCA View Post
    A Google Image Search for "bleeder plug" led me here: http://www.spieglerusa.com/dry-brake...sconnect-3.htm
    cool...

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    I don't recall seeing it on my 2000 RT, though I'll check when I head out to ride it home. But in the meantime, I see this at the MaxBMW parts fiche: http://www.maxbmwmotorcycles.com/fic...12330310_1.pdf
    2000 R1100RT / 1987 K75C (RIP) / Santa Clarita, CA

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    Quote Originally Posted by JamesInCA View Post
    I don't recall seeing it on my 2000 RT, though I'll check when I head out to ride it home. But in the meantime, I see this at the MaxBMW parts fiche: http://www.maxbmwmotorcycles.com/fic...12330310_1.pdf
    Oh, Good Grief. Genius. Well at least I learned something today.

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    Quote Originally Posted by EMSimon View Post
    Here is a picture of the "thing"
    The earlier 1100RT bikes had a bleed valve on both sides. The later 1100RT bikes only had a bleed valve on the left caliper. I don't recall the exact name of the part, but what you see on the right side caliper is a "fill plug." It was used at assembly to fill the brake system with fluid from the bottom. You can do several things with this:

    . You can ignore it and just bleed the system at the left side.
    . There's a grub screw on the top of the plug; you can remove it and screw in a bleed valve at that spot. This can be either temporary, just for bleeding - or you can leave it there permanently. It will sit kind of high up, but it will stay there.
    . You can remove the entire fill plug and replace it with a bleed valve in it's place. Note that the fill plug is usually installed with Loctite and will require some heat to loosen the Loctite when you go to remove the fill plug. Once the fill plug is out, screw in the bleed valve and your brakes will be just like the earlier brake calipers.
    Michael Stock, Trinity, NC
    R1100RT, R100, R60/6

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    Quote Originally Posted by JamesInCA View Post
    I don't recall seeing it on my 2000 RT, though I'll check when I head out to ride it home. But in the meantime, I see this at the MaxBMW parts fiche: http://www.maxbmwmotorcycles.com/fic...12330310_1.pdf
    Just a regular bleed screw on both of my front calipers.
    2000 R1100RT / 1987 K75C (RIP) / Santa Clarita, CA

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    Thank you all for shedding some light on this. It seems it is a 1999-forward change.
    The service bulletin describes the bleeding procedure, which I interpret as needing to bleed the right caliper, not only the left.
    There is still some confusion in the description as to when the fluid will come out of the caliper. First it says: Tighten the bleed screw by hand...so that the check valve is closed....Open bleeding screw again by ? turn (check valve open)But then it say in a "Caution" box: As the bleed screw is tightened, the valve opens and brake fluid flows out immediately

    Well, I guess I will see...

    Again, thanks to all for chiming in!

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