I think we can safely assume you are changing the wearing-out-bearing every two years because they are, well, "wearing out" and allowing water intrusion, or, if not yet leaking you expect them to and you're doing preventive maintenance. How paradoxical that Amel refers to this as a "wearing-out-bearing" - I'd expect "forever-bearing" would be more Amel-ish!
Anyway, as we all discussed on this thread some years ago, Captain Henri made an unusual choice by not specifying a much harder material for the application, which was the engineering judgement of SKF's seal engineer who reviewed this for me and recommended a much harder material.
Perhaps the captain assumed owners would replace it regularly as you have, and avoid a problem. I have always gone 3 or 4 seasons and not worried about the "chocolate" oil. The Speedi Sleeves do minimize water
intrusion because the bearing is not wearing out, although, of course, the lip seals have a limited life.
Let's hope that the prototype you mention was an attempt to improve on the Captain's original choice and will become available to us.
Cheers, Craig SN#68 Sangaris
, wrote :
That is the VERY REASON that I have not tried Speedi Sleeves. I assume the reason for using the sleeves is to get longer life out of the wear bushing. Since I service the C Drive and Bow Thruster every two years when hauled out for antifouling, I cannot justify adding a Speedi Sleeve or two. If you add Speedi Sleeves because you want to eliminate water intrusion, I suggest that you should review the service procedure. When it's done correctly, there will not be intrusion.
hat said, Amel accidentally shipped what I believe is a test prototype of a wear bushing with chrome plating where the seals ride on the bushing. I have not been able to get the story behind this chrome plated wear bushing from Amel. The person who has this part is going to try it shortly, but it will probably be a year or two before he has any reportable results.
Does anyone in the Group have any inside information on this partially chrome plated wear bushing? Maybe he shouldn't try it?
BeBe Amel 53 #387
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