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Changing shaft seal on Bukh DV10LSME Saildrive
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Chris Ross View Drop Down
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Joined: 16 November 2005
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Points: 70 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Chris Ross Quote  Post ReplyReply Direct Link To This Post Posted: 15 April 2011 at 10:24am
Where does someone get a new seal and housing?
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micha571 View Drop Down
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Points: 9 		Post Options Post Options   Thanks (0) Thanks(0)   Quote micha571 Quote  Post ReplyReply Direct Link To This Post Posted: 14 March 2011 at 4:20am
Hi,

I had success removing the sealing ring from the outside. It came out easier than I expected. The bearing housing seems to be ok, no signs of corrosion.

Thanks for your help!

Regards,
Michael
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Mad Max View Drop Down
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Points: 55 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mad Max Quote  Post ReplyReply Direct Link To This Post Posted: 10 March 2011 at 6:38pm
Michael

When I changed the seal on Mad Max I had the same problem with the bolt heads rounding out.  I took the next size larger allen wrench, cut off the L part to make a straight shaft and then slightly taper the end to fit the bolt to get it started.  I then pounded the shaft into the hex head which locked in.  I was then able to put a good size wrench on the shaft and was able to remove all the studs.  I believe the pounding also helped to break the studs loose.

Good Luck
Dick
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micha571 View Drop Down
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Points: 9 		Post Options Post Options   Thanks (0) Thanks(0)   Quote micha571 Quote  Post ReplyReply Direct Link To This Post Posted: 10 March 2011 at 3:17am
Hi,

thanks for your help !

I am thinking of maybe not doing anything right now, but leaving it the way it is for now and tackling the repair next winter.
It is not leaking much oil, maybe one or two drops per week now as it stands on land.

But how high is the danger of water leaking in and how much water might get into the saildrive and could it be damaged by this when using it like it is for one season?

Do you have any hints on this?

Otherwise I would just try to change the seal now and change the bearing housing next winter.

Regards, Michael
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Gerry McClintoc View Drop Down
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Points: 15 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Gerry McClintoc Quote  Post ReplyReply Direct Link To This Post Posted: 09 March 2011 at 10:32pm
Hi
I have had success in keeping the seal in and sealed by epoxing around it and building up the corroded housing. Its not a perfect way to do it but it seems to keep mine going without changing the parts.
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Bill Layton View Drop Down
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Points: 551 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Bill Layton Quote  Post ReplyReply Direct Link To This Post Posted: 09 March 2011 at 2:02pm
Yes the seal can be pulled and changed. However once you remove the prop you will see the real problem lies in the housing and not the seal. I have changed this part many times and the housing is always the problem. It just corrodes away and is unable to form a tight seal around the seal and hence the leaking. :)
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micha571 View Drop Down
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Points: 9 		Post Options Post Options   Thanks (0) Thanks(0)   Quote micha571 Quote  Post ReplyReply Direct Link To This Post Posted: 09 March 2011 at 1:16pm
Hello Bill,

thanks for the reply.

In an explosion view I saw this bearing housing. But it looked like the sealing ring could be removed by itself, by pulling it out to the rear, after removing prop, anode, locking ring  and the washer ?

I can't find a way to upload the explosion view, but it is here:

http://picasaweb.google.com/Banner280/Winter20102011#5582129308785326482

The seal is No. 20, the washer No. 21 and the locking ring No. 22 in that picture.

Or is (how?) the sealing ring fast attached to the bearing housing?

Regards, Michael
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Bill Layton View Drop Down
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Points: 551 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Bill Layton Quote  Post ReplyReply Direct Link To This Post Posted: 09 March 2011 at 1:02pm
The rear shaft seal sits in a self contained housing that also holds the rear bearing. It's tendency is to corrode with time. The result of this corrosion is a leaking seal. The complete rear bearing housing no doubt needs to be replaced. You'll be able to confirm this once the prop and zinc have been removed for inspection. You'll need to find a way to remove the bolts even if you have to weld an allen key to them, then replace the bolts afterwards. Goodluck

Edited by Bill Layton - 09 March 2011 at 1:04pm
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micha571 View Drop Down
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Points: 9 		Post Options Post Options   Thanks (0) Thanks(0)   Quote micha571 Quote  Post ReplyReply Direct Link To This Post Posted: 09 March 2011 at 11:42am
Hi,

I need to change the sealing ring on the shaft of my Bukh DV10 saildrive, since it is leaking oil. I know the right way would be to screw off the lower saildrive-housing, and then change the seal. But the six screws holding the housing are totally rounded off, there is no way of getting them out without damaging the housing.
So my question is: Is there a chance of changing the seal from the outside, after removing propeller and zinc anode? Has anyone tried replacing the seal this way?

Thanks for any help!

Regards,
Michael
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