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Go Back   SailNet Community > On Board > Gear & Maintenance > Shaft seal leak
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Thread: Shaft seal leak Reply to Thread
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Topic Review (Newest First)
03-01-2011 11:00 AM
sailingdog Did much the same on a transmission oil cooling line many years ago on a Ford E350 van using a leather keycase and some speaker wire. That repair lasted over 3,000 miles, mainly because my father forgot I had done the repair and didn't replace the transmission cooling line until he saw it on the next oil change.
Quote:
Originally Posted by MJBrown View Post
Amazing what you can do when you have to isn't it? Sounds like a good McGyver fix.
03-01-2011 10:53 AM
MJBrown Amazing what you can do when you have to isn't it? Sounds like a good McGyver fix.
03-01-2011 10:50 AM
sailingdog That is why I mentioned the need for plumber's putty or modeling clay.

Had a plastic stopcock on a Yanmar diesel inboard blow out on me last summer on a friend's boat. We fixed it by jamming the cut off tip of a pencil into the opening the plastic bit left behind and then wrapping it with Rescue tape. It held for long enough for us to get back home (three days away) and get it replaced. Interestingly, the piece that broke is discontinued, and the replacement piece uses a bronze stopcock, rather than a plastic one.

Quote:
Originally Posted by MJBrown View Post
Dog, the way the seal is mounted it would be a real struggle to wrap tape around the seal. Now maybe a repeat act of the little Dutch boy and the dike might work
03-01-2011 10:20 AM
MJBrown Dog, the way the seal is mounted it would be a real struggle to wrap tape around the seal. Now maybe a repeat act of the little Dutch boy and the dike might work
03-01-2011 10:11 AM
sawingknots i apologize for giving you false info.bad advise is much worse than no advise
03-01-2011 10:10 AM
sailingdog
Quote:
Originally Posted by MJBrown View Post
If you have a Volvo shaft seal there are no adjustments. The only maintenance is relubing the lips of the rubber bellows around the prop shaft. I assume when they replaced the shaft they reused the Volvo shaft seal. If your unit has a hose attached to a nipple check it for a leak. Look but don;t touch!!! Earlier models were metal and need to be replaced every few years. WARNING do not mess with it unless you can be sure to be hauled on a moments notice. The typical failure mode is the nipple breaking off flush with the shaft seal. Once that happens there is no way to stop the water ingress and unless you're hauled ASAP you will sink.
One quick way to stop the water ingress is to put some plumber's putty or modeling clay in the hole and then wrap it with the silicone-self-fusing "rescue" tape. That will often hold it long enough for you to get the boat out of the water. Carrying a couple rolls of the stuff aboard your boat, in the emergency tool kit, is usually a good idea.
03-01-2011 09:46 AM
beanctr56 Thanks Maine Sail, I tried to get some more grease (volvo) with a syringe and got it down to about 1 drip every 10 seconds. I don't know the grease history, I just had the boat delivered from BVI in Dec. I know they replaced the shaft before the trip because it was bent. I "assumed" they would grease the sleeve. About 90 hours since then. I ran it Saturday and went sailing thats when it strarted to leak. Maybe I need to run it again to heat it up and form a seal with the new grease.

Also MJ Thanks for the warning, I read more about that nipple and it sounds like I should replace it on the next haul out.

Rick
02-28-2011 10:44 PM
Maine Sail
Quote:
Originally Posted by HPLou View Post
If you have a shaft seal in lieu of a stuffing box, you should not be using any grease. The shaft seal uses a carbon flange and stainless steel rotor as a seal. See the following link. If there is a leak, it might be possible to reseat the rotor, if not you will have to replace the carbon flange.
PSS Shaft Seal
The Volvo dripless seal is very different from the PSS and it DOES require grease. Be sure to use the Volvo grease. I have found the easiest way to grease it is to pinch it and create a gap at the front edge then use a West Systems epoxy syringe filled with the Volvo grease and just squirt a little in there being careful not to harm the inner lip seal. You don't need a lot of grease but should do it every 100-200 hours of use or when necessary. If run dry without grease you may have toasted the inner lip seal.
02-28-2011 10:31 PM
HPLou If you have a shaft seal in lieu of a stuffing box, you should not be using any grease. The shaft seal uses a carbon flange and stainless steel rotor as a seal. See the following link. If there is a leak, it might be possible to reseat the rotor, if not you will have to replace the carbon flange.
PSS Shaft Seal
02-28-2011 12:45 PM
beanctr56 Thanks for the info MJ, the boat is a 2006 so I think the nipple is pretty good. It looks like its leaking from the front of the seal, maybe I should try to get more grease in there.

To others thanks but this unit has no nuts or locking nuts. Its a very simple system just using a rubber sleeve. There is a nipple on it attached to a thru-hull to keep it lubricated.

Rick
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