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hockeyshifter
Flying Brick Rider
Joined: 01 Jan 2006
Posts: 177
Location: harpers ferry WVa.
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 Posted: Thu May 06, 2010 3:24 pm Post subject: rear / final drive seal leak MAYBE.. |
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I have searched but the results are not showing up..
k1100rs 1993 40k miles.. a small leak has developed at the final / rear drive housing.
the leak is only happing when i drive into work; noon temps.. but on the return home at nite leak is gone. i pulled the vent cap to check if its clogged no dice .. the leak is small and appears to be weeping outta threads of the drain bolt.
is this prelude to a seal failure and were is the seal located and how hard is the job. ??? dose this seal fail frequently..
thanks for any all resonses..
...Shifter
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Ted
Site Admin
Joined: 03 Apr 2003
Posts: 1117
Location: Further
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| Posted: Thu May 06, 2010 3:27 pm Post subject: |
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Did you re-use the crush washer last time you changed the final drive fluid? Similar thing happened to me on my K75S, a new crush washer fixed it.
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 Ted
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Klinker
Flying Brick Rider
Joined: 28 Aug 2006
Posts: 876
Location: SD I-90
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| Posted: Thu May 06, 2010 8:28 pm Post subject: Re: rear / final drive seal leak MAYBE.. |
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| hockeyshifter wrote: | .. the leak is small and appears to be weeping outta threads of the drain bolt.
is this prelude to a seal failure and were is the seal located and how hard is the job. ??? dose this seal fail frequently.. |
Mine has failed twice - the first time at about 45K miles which shredded the FD, and again 20K after rebuild. The second failure may have simply been the FD innards vs. the seal. I was also uncertain as to the source of the leak as well the first time (was small and appeared to come from near the drain).
As the whole works went before I attempted to replace the seal, I'm not certain how difficult the job is. I can't imagine it would be too tough though and I don't believe it requires any special tools.
I haven't heard of frequent seal failures, but I would recommend replacing yours to see if that stops the leak...before things get worse.
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tlp
1994 K1100RS
Only the Reasonists. They believe in an evidence-based world, something called Rationalism. But it's a tiny group, not so influential.
- Page Griffin |
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Mystic Red
Flying Brick Rider
Joined: 28 Mar 2005
Posts: 2330
Location: Twin Lakes Idaho
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| Posted: Thu May 06, 2010 8:55 pm Post subject: |
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| Quote: |
Did you re-use the crush washer last time you changed the final drive fluid? Similar thing happened to me on my K75S, a new crush washer fixed it. |
If it is coming from the drain plug that's what I'd do too! Catastrophic failure is for clutch dumping hot rodders. 
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Scott Hespelt, '94 K11LT
K11 OG #466 |
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hockeyshifter
Flying Brick Rider
Joined: 01 Jan 2006
Posts: 177
Location: harpers ferry WVa.
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| Posted: Fri May 07, 2010 2:09 am Post subject: |
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thanks to all that responded.. i cleaned the final drive at work with brake cleaner and paper towels... let the unit sit for about 10 hours. checked again and no leaks. took off for the house and stopped at the halfway point ... checked and rubbed a paper towel between the rotor and the housing and got a small spot of gear oil ( smell test) about the size of a pea. (i would say the loss of fluid is only about 1 tea spoon total so far). GOT home ran a shop rag again just brake dust this time .... and then checked the temp of the housing about 105 degrees F.
is it normal for the drive to this hot?
Capital Cycles has a seal ... is it possible to replace the seal with the final drive still in the frame?
Clymer states that the final drive is near BULLET PROOF... is that statement true?
will be replacing the the oil and installing a new crush washer this week end.
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Ted
Site Admin
Joined: 03 Apr 2003
Posts: 1117
Location: Further
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| Posted: Fri May 07, 2010 9:27 am Post subject: |
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| Quote: | | Clymer states that the final drive is near BULLET PROOF... is that statement true? |
Yes, it is true - failures are exceedingly rare.
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Ted
KOG#1 |
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hockeyshifter
Flying Brick Rider
Joined: 01 Jan 2006
Posts: 177
Location: harpers ferry WVa.
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| Posted: Sat May 08, 2010 6:41 pm Post subject: |
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CONFRIMED.. the seal is leaking... has anyone done a seal replacement with the drive still on the swing arm???
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hfxrzw
Mad Brick Rider
Joined: 30 Jan 2009
Posts: 78
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| Posted: Sun May 09, 2010 7:16 am Post subject: |
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Can't be to difficult. Difficult part is getting the old seal out. You'll have to get some hooks in or screws to pull it out.
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Cheers, Rene
Greetings from Florida.
BMW K100 '85 |
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