Mailing List flyrotary@lancaironline.net Message #16797
From: David Staten <Dastaten@earthlink.net>
Subject: Re: [FlyRotary] front cover o-ring?
Date: Tue, 08 Feb 2005 08:23:39 -0600
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
I got the master rebuild kit from Bruce.. and it had two different o-rings.

The one that I used is NOT the one you have depicted in pic 3.. rather.. its a thinner ring but its diameter goes up to the outer diameter of the milled recess in the front housing.
 
Dave

Russell Duffy wrote:
Message
Greetings,
 
I went out to finish putting on the front cover, but didn't get far.  Attached are several pics of the front housing where the o-ring goes.  One shows just the housing.  One shows the old o-ring and nylon backing washer.   The other shows the washer that came in the overhaul kit. 
 
Previously, I had the thicker o-ring with backing washer, and the front cover used a gasket.  The kit instructions say to not use the gasket (and none is included), since the included o-ring is thinner.  The instructions call the nylon washer version 89 and later, so it appears that's what I have, though I thought I had already determined that my front housing was an 87-88.  Just another mystery. 
 
Anyway, the kit instructions say- "Choose the correct o-ring for your application: small diameter for 86-88 models, larger diameter for 89 and later".  The o-ring in the picture is the only one I see, except for a tension bolt o-ring that wasn't needed.  As you can see, this doesn't fit the milled recess in the housing, though I suppose it might still work OK.  In the video, the o-ring that Bruce installs fits in the outer diameter of the recess.  Is this the correct o-ring, or the "small" one that should go to the 86-88 model?  It just doesn't look right to me, and this is fairly important.  Worst case, I could always get a gasket and put it back the way it was, with the old o-ring.
 
Thanks,
Rusty (no further aircraft purchased since starting this message)
 
 










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