Question on Bearing change out

[Michael Laggis]

I found the shields extremely easy to remove.  They look to be
rubber/plastic coated brass.  I took an exacto knife and slid it up into the
outer race and the shield popped right out.  There was no damage to the
shield or the bearing.  I believe that if I wanted to I could put the
shields back in.

Michael Laggis
  

-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On
Behalf Of Tom Simes
Sent: Monday, February 21, 2005 10:02 AM
To: discussion at nsrca.org
Subject: Re: Question on Bearing change out

On Mon, 21 Feb 2005 10:28:19 -0800 (PST) Bob Richards <bob at toprudder.com>
wrote:

> I had heard that the "shields" were really dust covers, and would not 
> impede the lubrication from getting to the bearings during normal use.
> IMHO, in the event of a bearing failure, having the shields in place 
> might prevent parts of the bearing from damaging the rest of the 
> engine.
>  
> Having said that, I have never installed shielded bearings, so I don't 
> have any experience with my theory. Any comments?

I was just going by Boca's documentation which points out that removing the
shields on the main bearing increases the flow through that bearing to the
rear of the engine where the connecting rod and piston pins live.  Also by
example the originals in my engines haven't had shields and further the
things take relatively little force to remove once you get a good hold on
them.  I would imagine that in a really catastrophic failure the shields are
just going to become part of the high speed metal soup anyway.

--
Tom

_____________________________________________________________________

       |  ,  |               Tom Simes
---------(@)---------        AMA 230068
        --|--                NSRCA 3830
          '                  nsrca at shinymetalass.com
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