Yes, I hope we get something from the oiriginal post, but without labouring the point, the problem has probably arisen because the original stuffing box was replaced with something that is more flexible. My best advice would be to to go back to that. The Volvo seal has from memory about 80-100mm bearing surface on the shaft right up to the point where it attaches to the tube, so it is obvious that just like a stuffing box it provides some support for the shaft. I fail to see how it can wear any more if the shaft is lined up correctly. In my view using this seal is this situation is no different from a stuffing box except that it is drip free.
I also know about the ways of overcoming the problem of centering the shaft, but that would not be necessary if the designers did a "proper job" and put a bearing on the inboard end in the first place! The reason they don't is because the stuffing box gives just enough support. But, of course we are now going round in circles.
For well designed sterngear that avoids most of these problems see the Vetus catalogue pages 156/7!
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Re: 2 Bladed Folding Props & PSS Dripless Shaft Seal
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