Final Drive Death

Discussion in 'GS Boxers' started by bemiiten, Jul 11, 2005.

?

How did your failure happen?

  1. No notice at all ,left me stranded on the spot.

  2. Noticed a problem ,but was able to ride back to civilazation

  3. Just checked and felt fine ,but died a few hundred miles later

  4. Noticed problem,rode bike hundreds of miles without total failure

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  1. Steptoe

    Steptoe steptoe

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    why did you carry on when the oil was coming out ?


    this usually means the bearings collapsed, and taken out the seal -

    On all the bearings i've ever changed, you could always feel a rumble or vibration when turning the wheel
    #21
  2. Steptoe

    Steptoe steptoe

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    image shack is back on line -

    bearing drops straight back on the crown wheel - if it doesn't you'll have to take it off and get it hotter - SO if it doesn't want to drop on all the way,take it off and heat it up hotter -

    [​IMG]

    [​IMG]

    Put the cover over the crown wheel ( use the old shim ) and replace in the opposite way you removed all the parts .

    If the seal wasn't leaking - leave the old seal in place, including the large outer cover "O" ring , you don't want to be messing around doing a perfect workshop job, you just want to carry on with your trip, or get to where your going. Then you can do the proper job.
    Even if you can't do it yourself, take a bearing and seal with you ( takes up no space and very little money) , you'll always be able to find a workshop that can do the job, if you've got the correct bearing and seal to hand.
    #22
  3. Tourmeister

    Tourmeister What's that funny noise?

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    Like the poll said, we were in the middle of nowhere... I checked the final drive oil and it was still completely topped off. And since there was no grinding or any other syptoms, I was hoping to make it back to our base at a subdued pace. It appeared to be a slow leak. Apparently, the bearing had already started coming apart enough to tear the seal. Oddly, it was smooth right up to the moment it let go, and at that time, it was still full of oil. So I don't think a lack of lubrication was the issue. I did not realize the bearing failure would be so sudden. Lesson learned.
    #23
  4. cgdR

    cgdR Gearhead

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    It may have felt smooth to your back end, but I bet that your right hand would have felt the roughness 1000 miles earlier.

    Steptoe, thanks a lot for the pictures! I can attest that the whole procedure is doable as Steptoes says, and that the only hard part is to drive the old bearing out. A bit of side-road desperation would have easily taken care of the problem.
    #24
  5. Rider

    Rider In Your Heart, You Know I'm Right

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    That is sooooooo ugly. :cry
    #25
  6. freeflow

    freeflow get in or go in

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    ok part numbers would be GREAT help to us GS noobs......If i have those...order goes in tomorrow

    thanks for the great info....easing my mind on the GS reliability
    #26
  7. Professor Fate

    Professor Fate Hand crafted

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    Is there an aftermarket part number for these? I checked with NAPA on this FAG bearing and they couldn't cross it. The dealer is selling me theirs for $120. :deal Kinda pricey. Thanks for the instructions on doing the job!
    Fate
    #27
  8. Steptoe

    Steptoe steptoe

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    Standard bearing manufacture number of the rear bevel drive bearing ( crown wheel) is, 61917 C3 -
    #28
  9. Professor Fate

    Professor Fate Hand crafted

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    Dealer price $132. Aftermarket bearing place $172. :huh
    #29
  10. BiG DoM

    BiG DoM African Adventurer

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    Is this a BMW part number? FAG etc???
    #30
  11. Professor Fate

    Professor Fate Hand crafted

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    That is the actual number on the bearing. The BMW part numbers are: Bearing- 33121468899 The seal # 33121241938 O ring # 33111451182
    #31
  12. Steptoe

    Steptoe steptoe

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    61917, it's the actual bearing number -no matter who manufactures it, it'll have that number - even the bearing sold by BMW will have that number on the bearing.
    It's a world wide standard -
    the C3 number is the tolerance allowed -

    here in the UK, it costs £28 from BMW dealers -
    #32
  13. OUtback UFO

    OUtback UFO GLOW IN DARK SPACEINVADER

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    :cry
    okay to quote and then shot my self in the foot.. at 87,003 the drive bearings and pinon bearings went out at 3am in the middle of UT... total cost of repair at LV BMW (80$ per hour labor) 929.72$... with the towing to LV by AAA of $445.00... was a very expesive business trip to LA this last weekend...

    I had a good 50miles of rough riding.. thought at first my front brakes were causing problem... so i rode to the next fuel up on my route to find the drive seal had gone and final drive fluid over everything... luck i did not loose the gears...
    #33
  14. bemiiten

    bemiiten League of Adventures

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    Hey, At least you can vote in the poll now! :D Did LV BMW replace the bearings or the whole final drive for $929.00
    #34
  15. Lobby

    Lobby Viel Spass, Vato!

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    I'm wondering if I should buy these parts (in England), and just carry them around in case....
    #35
  16. JimVonBaden

    JimVonBaden "Cool" Aid!

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    Add me to the list of failures.


    I am at the MOA and the FD on my 99 GS is rumbling badly and I need a new one! Any help?

    Jim :brow
    #36
  17. Professor Fate

    Professor Fate Hand crafted

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    Can anyone tell you if its just the main bearing or the whole FD that's bad?
    #37
  18. Steptoe

    Steptoe steptoe

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    if it's rumbling, chances are it'll be the crown wheel output bearing -

    you can fix this on the road - you need bearing 61917 C3, if the seal isn't leaking, you don't have to replace it - and look back in this thread, all you need to know on how to fix it in an emergency -
    #38
  19. bemiiten

    bemiiten League of Adventures

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    BMW part# for crown bearing that measures 85x120x18 is 33121468899. The seal is 33127663482 list is $124.00 and$18.70.
    #39
  20. OUtback UFO

    OUtback UFO GLOW IN DARK SPACEINVADER

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    That is for the labor and bearings... turned into 570 in labor since the pinon bearings need to be replaced... they found one final new final drive for 1100$ or they would have to back order it... i did have to pay a good 40$ on over nighting the stuff... there was no reason to replace the entire thing with a mutiple of breaking other issues...
    #40