Bow thruster oil seal leak
Peter de Groot
Greetings all, This is the second lip seal I've installed. (The previous owner left a handy stash of parts on board) The first had a single lip, the second came in a bag with Paulstra brand and part number 792521 IEL 30 42 7. I'm deducing it came from Amel. It had two lips, a heavier one inwards to retain the oil and a lighter one outwards nearer the outside surface. Regardless they both leaked after installing. The surface of the shaft which is not SS (FRP maybe??) feels rough, and there was only a narrow band where it feels smoother. The oil that came out was cloudy green, thick like a milk shake, so I'm thinking water was entering. The question is what to do. I'm contemplating 3 choices: -Purchase a new shaft from Amel, perhaps a new complete bow thruster, as the counterbore to receive the seal also has some chips. -Find a SS speedi-sleeve to provide a smoother surface, machine existing shaft if necessary. -Make a new shaft with a local machine shop. In which case which material? Acetal perhaps, I'm assuming stainless is a no-go. I'd appreciate any advice if any of you have experienced the same problem. Peter de Groot SM 207 la Querida Moss Landing, California.
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Peter, You have a number of problems, some I can help you with. SUGGESTIONS:
It is possible that the propeller shaft is worn and needs replacing. I believe Amel has these in stock. I have seen worn shafts repaired with a stainless steel sleeve and work correctly, but I think by the time you pay to have this done, a replacement shaft is a better and cheaper solution. It is also possible that the seal seat (the recessed area where the seal is pressed into) is damaged, or was not clean when you pressed the new seal in place.. Bill
On Sun, Mar 15, 2020 at 12:08 PM Peter de Groot <pandmdegroot@...> wrote:
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Il 15/03/2020 18:08, Peter de Groot ha
scritto:
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Peter de Groot
Thank you Bill and Giovanni, Bill, RTV was used, I just did a good job wiping off the excess. The leak is between the shaft and the lip of seal not seal to housing. I agree that we need SAV at Amel. I actually sent SAV an inquiry earlier today. I always like to be prepared with contingencies and choices.
Giovanni, I agree, a little water in the oil is OK, but this leak is too much.
Cheers, Peter La Querida SM 207 Moss Landing, California
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