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Old 23-05-2014, 09:01   #1
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Dripless shaft seals

I have a Beneteau 393 with a Volvo Dripless Sahft seal. It is leaking and I am wondering how to service it. Help appreciated!
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Old 23-05-2014, 09:07   #2
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Originally Posted by iwindance View Post
I have a Beneteau 393 with a Volvo Dripless Sahft seal. It is leaking and I am wondering how to service it. Help appreciated!
Is the shaft well aligned? If so the only root causes I can think ( normal wear, damage due to lack of grease or damage due to lack of burping out air when launching) require a new seal. It is easy to change it out of the water. Some people can do it in the water but I am not in that league.

Just don't let people tell you that a seal for one inch shafts will work on a 25mm shaft..

Charlie
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Old 23-05-2014, 09:17   #3
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Re: Dripless shaft seals

Where does it leak?

O put a bead of 4200 calking around the front of the seal and shaft, just in case the O rings start to leak. Also put a hose clamp in front of the seal to help prevents from sliding.

Its common when the shaft is turning for the seal to leak which is normal as the water lubricates the seal.
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Old 23-05-2014, 10:46   #4
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Re: Dripless shaft seals

I disagree. I've had a shaft seal made by PSS and it hasn't leaked a drop in eight years


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Old 23-05-2014, 13:23   #5
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I disagree. I've had a shaft seal made by PSS and it hasn't leaked a drop in eight years
OP has a Volvo seal, which is a completely different animal than a Volvo seal. Neither of them normally leaks, but that is another story.

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Old 23-05-2014, 13:27   #6
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Originally Posted by rw58ph View Post

Its common when the shaft is turning for the seal to leak which is normal as the water lubricates the seal.
That is not correct for a Volvo seal. A Volvo seal is lubricated by grease, cooled by water and will not leak for years, to the point in can be used in some boats without a proper bilge where evena small leak makes a mess. Ignore Volvo's instuctions at your own risk. The Swedes know their engineering!
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Old 23-05-2014, 16:51   #7
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Re: Dripless shaft seals

It appears to be leaking out of the front of the black hard plastic tube. I haven't greased it, had the boat for two years. I have mixed information about greasing, seems there is a lot of confusion mostly due to talking about different DSS. The picture I included shows the shaft end is where the water comes out.
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Old 23-05-2014, 16:59   #8
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Re: Dripless shaft seals

It definitely needs grease.

10. The seal should be greased after every 200 hours of operation or once a year. Press in approximately I cu. cm at each lubrication (D).

see here:http://forum.katera.ru/index.php?app...tach_id=266246
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Old 23-05-2014, 17:55   #9
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I have mixed information about greasing, seems there is a lot of confusion mostly due to talking about different DSS.
I am afraid I do not understand what is "mixed".

Have you read the instructions from Volvo? Do you have any serious document that says that a Volvo shaft seal (not any other type of seal that relies on a different design) should not be greased?

When I say "serious" I mean something from Volvo or from an engineer who has read the instructions from Volvo and can explain why he/she knows better than Volvo..

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