Today I was able to replace both lower seals on my Naiads. It was a pretty easy job with help from Mark (Airpilot). First we pulled the fins:
Then we pulled off the seal retainers and the seals. The trick here is use a dry wall screw to get a grip on the seal and then pull them out with a pair of Visegrips.
The seals were in bad shape. The new seals are a white translucent color and the old ones looked like this:
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Naiad lower seal replacement
Sky Cheney
1985 53EDMY, Hull #CN759, "Rebecca"
ELYC on White Lake--Montague, MI
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Re: Naiad lower seal replacement
Next, we cleaned up the shafts and seal surfaces with some emory and some MEK to get the old caulk out. Yes, that's me pushing in the final seal.
Next the seal retainer plates went back on.
And finally, we put the fins back up on the tapered shafts and torqued the bolts. Hmmm, no pic of the completed job. But all and all about a 4-6 hour job with plenty of interruptions along the way. It was one of those rare projects that goes better than expected with minimal surprises.Last edited by SKYCHENEY; 12-27-2008 at 08:17 PM.
Sky Cheney
1985 53EDMY, Hull #CN759, "Rebecca"
ELYC on White Lake--Montague, MI
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12-27-2008 08:52 PM #3Senior Member
- Join Date
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- 338
Re: Naiad lower seal replacement
Sky
Do you happen to know what the factory recommended replacement cycle for the Niad seals is?
Thanks
Spin
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12-27-2008 09:22 PM #4Senior Member
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- Apr 2006
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Re: Naiad lower seal replacement
Sky What's involved in pulling the fins off?
Brian
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Re: Naiad lower seal replacement
Sky
Nice work. Next time I do mine I'll use the latex gloves too.
The experts suggest changing them every 2 to 3 years. I agree considering the relative low cost of the job and what the consequences are if you get water into the bearings.
Chris
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Re: Naiad lower seal replacement
Brian,
Pull out the rubber plugs then unscrew the bolt that holds the fin to the shaft. Next insert the puller tool into the shaft and tighten it until it jacks the fin off of the shaft. The puller tool is pictured above next to the fin. It is just a large hardened bolt.Sky Cheney
1985 53EDMY, Hull #CN759, "Rebecca"
ELYC on White Lake--Montague, MI
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12-27-2008 10:39 PM #8Senior Member
- Join Date
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- 2,886
Re: Naiad lower seal replacement
OK Sky it's making sense I've got the puller tool and didn't know what it was untill now. So the bolt that holds the fin on must be way up inside the fin since the shaft coming down looks pretty short?
I have to do this on my next haul so I'm trying to understand it
Brian
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