FD Outer Seal Pictorial!

Discussion in 'GS Boxers' started by JimVonBaden, Apr 19, 2013.

  1. ElGringo

    ElGringo Long timer

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    Hi Jim, big fan here. I was told by phoenix bmw that this is incorrect. You should NOT push the seal in as far as you can. I had inquired about this, and they showed me the special bmw tool they used in order to place the seal at the correct depth. I ended up duplicating the tool. Perhaps something has changed on later models??? I performed this procedure on a 2007.

    H
    #21
  2. cjack

    cjack Been here awhile

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    How deep is the relief on the tool...measure from the larger diameter stop surface to the seal pushing surface?
    #22
  3. JimVonBaden

    JimVonBaden "Cool" Aid! Supporter

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    The bike I used this on was a 2008. I have also done it on a 2005, 2006, 2009, and a 2010. They can say what they like, but my experience over about 20 bikes has been universally successful. I am sure they believed what they said, but it is just not the case.
    #23
  4. cjack

    cjack Been here awhile

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    Interesting what the depth is before removing the old seal.
    Could be a change?
    In the 70s, the rear engine seals leaked chronically. BMW changed the depth of the seal. I don't recall what the theory was in doing that, but I believe the frequency of leaks was reduced.
    #24
  5. JimVonBaden

    JimVonBaden "Cool" Aid! Supporter

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    Could be, but since none of the seals I have changed have leaked, I do not see how this is an issue. :dunno

    The ReProm says this:

    Position shaft sealing ring (1) with the closed side out (arrow) and use drift (No. 33 1 892) to install it until fully seated.


    It is unclear if the drift fully seats it against the bearing race, or just positions it.
    #25
  6. cjack

    cjack Been here awhile

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    Yes...won't be the first time BMW just made a tool and more was read into it than was there.
    #26
  7. ElGringo

    ElGringo Long timer

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    I don't recall what the depth was. Id have to go dig up the tool and check.

    But I believe this photo shows the relief that Jim refers to:

    [​IMG]

    Pressing up against the relief would insure proper alignment. And yes, anything a bmw mechanic says, should be taken with a grain of salt.
    #27
  8. slade2

    slade2 Been here awhile

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    You need to install it deep enough to just get the snap ring back in place,
    that is pretty much botomed out in the bore.

    Slade
    #28
  9. N-m

    N-m Captain 2 Sexy

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    If you have a snap ring in place that holds the seal in place. I would think The seal is riding against the snap ring or could work its way over to the snap ring at some point. That could mean depth is important from the standpoint of installing the snap ring deep enough to simply get the ring back in place.

    Do you have a pic of the tool? Is it round and covering the majority of the face of the seal? If so I would think the factory is trying to seat the seal evenly all the way around with a lesser chance of damaging it.

    Question: does this apply to a 1995?
    #29
  10. JimVonBaden

    JimVonBaden "Cool" Aid! Supporter

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    If you seat the seal against the bearing race the snap ring groove is perfectly positioned.

    No, it doesn't apply to the 95GS.
    #30
  11. N-m

    N-m Captain 2 Sexy

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    I am not near my bike and could not remember the FD set up. I saw a picture of a 96 and knew you were talking about a later set up. Thanks.
    #31
  12. KHud

    KHud Survivor Supporter

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    Jim,

    Thank you for your contributions to all of us wanna be mechanics. I just noticed that my R1200R (08) is weeping and I'm about ready to replace the seal. QUESTION: How does one determine if the bearing behind the seal is bad and if so what is the proceedure to replace. (Remember no good deed goes unpunished).

    By the way, on the BMW fiche there is a PDF file shown where the seal in question is listed. The PDF shows essentially the same proceedures as you showed us for replacement, but no where near as well illustrated as yours. The special tool for seating the seal is shown and it appears to me it will push the seal in as far as it will go and not to a predetermined lesser depth.

    Thanks again.
    #32
  13. JimVonBaden

    JimVonBaden "Cool" Aid! Supporter

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    Hi,

    Thanks, and unfortunately the bearing is not a general DIY replacement, though it can be done. Usually you will know if it is bad because you have movement in the wheel when attached. You are allowed 1mm of movement at the rim.
    #33
  14. Britome

    Britome Get Free

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    So this process is if you see oil weeping out of the plastic?
    #34
  15. JimVonBaden

    JimVonBaden "Cool" Aid! Supporter

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    Right side leak, yes.
    #35
  16. GL1800

    GL1800 RAT PACK---GS GAINT

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    when ordering my new seal I see there is a new revised part# 33117722890. this seal is 59.8 75 8 old seal 60 75 8 so i like improvement!!:clap
    #36
  17. teomannaskali

    teomannaskali Long timer

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    Where did you order the seal? İ have a 2005
    #37
  18. JimVonBaden

    JimVonBaden "Cool" Aid! Supporter

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    Any BMW dealer should have it in stock.
    #38
  19. mefly2

    mefly2 Long timer

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    Agreed!
    #39
  20. DaveCR

    DaveCR Been here awhile

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    so I think I have to change my seal as well!

    today I was washing my bike after a loooooong time and I found this:

    [​IMG]

    I hope there's still some oil inside :eek1
    #40