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post #1 of 25 Old 12-14-2016 Thread Starter
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Rudder Shaft Seal

I spent the day dropping my rudder so I can replace a very pitted and grooved prop shaft. Going with the PSS Shaft seal for the prop shaft. Was hoping to us a PSS on the rudder too but found out they do not make a seal for a 2 and 3/8 rudder shaft. Has anyone used a sealing system for a rudder post other than the conventional flax packing system already in us on PSC 34's? The current design does not allow for ease of adjustment or replacement. The problem seems to be the close proximity of the radial to the top of the rudder tube. Any help will be greatly appreciated.

p.s. I have reviewed the posts with Raindog and Dave regarding the current system great information but now what I am looking for. Thanks.

Indecision may or may not be my problem.
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post #2 of 25 Old 12-14-2016
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Re: Rudder Shaft Seal

The problem you will come up against is the upper seal is also the upper bearing. with new packing you will get 10 years or more from the gland as the rudder shaft moves little.

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post #3 of 25 Old 12-15-2016 Thread Starter
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Re: Rudder Shaft Seal

Simon thanks for the reply. I am assuming that the lower bearing is where the bottom of the rudder rests in the gudgeon??? I was hoping that PSS made a housing that would fit but they don't. Its looking like I may have to go ahead and stay with the old system....may have to buy a new stuffing box though...the old one has seen better days.
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post #4 of 25 Old 12-16-2016 Thread Starter
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Re: Rudder Shaft Seal

I managed to remove the old packing box on at the top of the rudder shaft log and clean it up. I was surprised to be able to get the top of the box off so I could access the packing. I will continue to use the system provided by the factory.

During my work I found that there wasn't anything between the bottom of the rudder shaft and the gudgeon. This makes for a metal (stainless) to metal (bronze/brass not sure). Shouldn't there be a friction reducing device in the gudgeon cup to prevent wear and friction??? Anyone know?
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post #5 of 25 Old 12-16-2016
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Re: Rudder Shaft Seal

There is nothing in mine although I could imagine a glass filled Teflon disk or washer set in the cup of the lower gudgeon for the rudder shaft to rest on although stainless steel on bronze is a pretty good bearing pair itself in such a low speed application.

With my rudder shaft, the tube, and the gudgeon all wiped clean and reassembled, the major drag on the rudder turning comes from a slight misalignment of the tube with the gudgeon which causes a little binding in the tube. That goes away when I pump a bit of grease into the side of the tube through the grease fitting under the cockpit seat. My boat was built as a tiller boat and it is easy to feel the drag. (I don't have packing on the rudder shaft as the tube comes up to the cockpit seat.)

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Last edited by wsmurdoch; 12-16-2016 at 08:36 AM.
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Re: Rudder Shaft Seal

Thanks Bill. I was considering placing a urethane washer there, but I think the force would easily wear it away. I don't have the tube you have since Hush was manufactured with a wheel. During the disassembly, I did note that there was a bit more wear on the rudder shaft on the front edge. I think it was caused by a slight misalignment of the rudder stuffing box. Really looking forward to the new prop shaft and a non leaking stuffing box.
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post #7 of 25 Old 12-16-2016
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Re: Rudder Shaft Seal

Good article on the subject here Sealing systems
Main page here http://www.jefa.com/rudder.htm
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post #8 of 25 Old 12-16-2016
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Re: Rudder Shaft Seal

The PSC manual says to grease it with "waterproof axle grease". I've always done this. At 20 years, the shaft gudgeon interface on Swan was still tight but easily moved.

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Re: Rudder Shaft Seal

Dave, Our gudgeon had to be removed with a couple of blows from a dead blow hammer. I did notice, even on our 27 year old PSC that there was grease in the gudgeon and along the entire post. At first glance, it seems that putting the rudder back in is straight forward, any tricks you might want to pass along.

I hope you are doing well after your decision to sell Swan....Take care!
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Re: Rudder Shaft Seal

Kunutirk, I looked at the web site you suggested. Tons of great information and ideas. Thanks so much for the insight.

Indecision may or may not be my problem.
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