Mailing List flyrotary@lancaironline.net Message #59609
From: Kelly Troyer <keltro@gmail.com>
Subject: [FlyRotary] Re: That damn O-ring again!
Date: Sun, 17 Feb 2013 10:44:00 -0600
To: Rotary motors in aircraft <flyrotary@lancaironline.net>


On Feb 17, 2013, at 1:33, "Todd Bartrim" <bartrim@gmail.com> wrote:

Hello All;
It's been awhile since I last posted, though I've been reading almost every post to sort of keep up with the latest developments.
    The last time I flew I was seeing lower oil pressures around 35-40 psi, so I decided to pull the front cover the other day. I had previously had a complete O-ring failure so had done the recommended fix at the time. When I pulled it the other day, everything looked good but obviously wasn't. I recalled Chris having a repeat of this last fall so searched the archives and found a reference to him pushing a small cylinder in there. There was also a previous post where Lynn commented on somebody else's idea of a Teflon washer being a good idea. So I've decided to do both. Attached pics should show in better detail than I could explain. I've done a trial fit, but will await comments before I assemble with sealant.

Todd Bartrim

C-FSTB

   Todd,
      I still like the way "Mistral" and others take oil from the front side hsg by drilling 
out the brass plug and slightly enlarging the passage to the oil pump then providing
an appropriate counter bore for an "O" ring.........."Mistral" had  elaborate housing that
included a oil filter and over pressure bypass back to the oil sump.........In my case I
fabricated a small aluminum block that bolts to the side hsg using existing studs and threaded holes and provides the material needed to thread for whatever oil hose fitting  
you choose to use.........I do not have a photo on this computer of the aluminum block 
that I made but am sending three photos of my side hsg jigged up in my "CCM" (cheap
Chinese mill) to counter bore for the "O" ring............FWIW 


--
Kelly Troyer
Dyke Delta_"Eventually"
13B_RD1C_EC2_EM2






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