X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-ob0-f176.google.com ([209.85.214.176] verified) by logan.com (CommuniGate Pro SMTP 6.0.1) with ESMTPS id 6068577 for flyrotary@lancaironline.net; Sun, 17 Feb 2013 12:28:03 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.214.176; envelope-from=keltro@gmail.com Received: by mail-ob0-f176.google.com with SMTP id v19so4963125obq.21 for ; Sun, 17 Feb 2013 09:27:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:x-received:in-reply-to:references:date:message-id :subject:from:to:content-type; bh=Tx9Bz6Cb9rHANNfvlMOZfoJp2pwsUBLGmNdq31pV3Aw=; b=fQ3gC1MQJPBDqTn6WTYWpqAc1mW6ZUUSyUMd7m7C/XkzDE7JusVXXzNaeP4RUNcCWz jsk6UwFN9ALrqql7MuI6HjhGJPfHintubQOEW8H+7VIwCsuPfJfOVSNQ1rI0bfd5T8Gi YwVoyz65i6OjcbynolnKHZNVSVXuG9Qj7MM4iZSiW3x/t0uR87pW3WzepBug3CJU+Afh v9op5zrdBatgMkVVtbVcVWYMgUwO4ocvQe9B2TimY6HK6SA8FcH3sHt30HF9eshU+e/l NfuEiVfg28auvtEkpoQTMhWNvPYNKjjuB4b6I6A4cjksIU3uaoYLZQth8tMELtCJRPGu uRAQ== MIME-Version: 1.0 X-Received: by 10.182.54.102 with SMTP id i6mr4873348obp.67.1361122047707; Sun, 17 Feb 2013 09:27:27 -0800 (PST) Received: by 10.76.154.228 with HTTP; Sun, 17 Feb 2013 09:27:27 -0800 (PST) In-Reply-To: References: Date: Sun, 17 Feb 2013 11:27:27 -0600 Message-ID: Subject: Re: [FlyRotary] Re: That damn O-ring again! From: Kelly Troyer To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=14dae93a1145264b6b04d5eeec76 --14dae93a1145264b6b04d5eeec76 Content-Type: text/plain; charset=ISO-8859-1 Mark, That can work but you have to be very careful when threading the side hsg for a fitting as the hsg is thin on one side and restricts what size fitting you can use.....I felt that using this method added a restriction after going to the trouble of drilling the the passage to the oil pump slightly larger..........Also is using this method be sure to use a straight thread fitting with "O" ring (AN) or flat sealing washer (Metric) as a tapered thread fitting (Pipe Thread) will crack the side hsg on the thin (weak side) of the hole...........FWIW Kelly Troyer On Sun, Feb 17, 2013 at 10:53 AM, Mark Steitle wrote: > Just to add what Todd said, you can drill the center of the brass plug, > tap to say 10-32, and then use a slide-hammer to pull the plug from the > galley. Finally, tap the new outlet for an AN fitting. You'll still need > to deal with the front cover o-ring though. If you simply block it off, > the OMP won't get oil. > > Mark S. > > On Sun, Feb 17, 2013 at 10:44 AM, Kelly Troyer wrote: > >> >>>> >>>> On Feb 17, 2013, at 1:33, "Todd Bartrim" 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 >>> >>> >>> >>> >>> >> >> >> >> >> >> >> >> > --14dae93a1145264b6b04d5eeec76 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable =A0 =A0Mark,

=A0 =A0 =A0That can work but you have to be very = careful when threading the side hsg for a=A0
fitting as the hsg i= s thin on one side and restricts what size fitting you can use.....I
<= div>felt that using this method added a restriction after going to the trou= ble of drilling the
the passage to the oil pump slightly larger..........Also is using thi= s method be sure=A0
to use a straight thread fitting with "O= " ring (AN) or flat sealing washer (Metric) =A0as
a tapered = thread fitting (Pipe Thread) will crack the side hsg =A0on the thin (weak s= ide)
of the hole...........FWIW

Kelly Troyer
On Sun, Feb 17, 2013 at 10:53 AM, Mark Steitle= <msteitle@gmail.com> wrote:
Just to add what Todd said, you can drill th= e center of the brass plug, tap to say 10-32, and then use a slide-hammer t= o pull the plug from the galley. =A0Finally, tap the new outlet for an AN f= itting. =A0You'll still need to deal with the front cover o-ring though= . =A0If you simply block it off, the OMP won't get oil. =A0 =A0

Mark S.

On Sun, Feb 17, 2013 at 10:44 AM, Kelly Troyer <<= a href=3D"mailto:keltro@gmail.com" target=3D"_blank">keltro@gmail.com&g= t; wrote:


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

Hello All;
It's been awhile since=A0I=A0last posted, though I've been rea= ding almost every post to sort of keep up with the latest developments.
=A0 =A0 The last time I flew I was seeing lower oil pressures around 3= 5-40 psi, so I decided to pull the front cover the other day. I had previou= sly had a complete O-ring failure so had done the recommended fix at the ti= me. 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 wher= e 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

=A0 =A0Todd,
=A0 =A0 =A0 I still lik= e the way "Mistral" and others take oil from the front side hsg b= y drilling=A0
out the brass plug and slightly enlarging the passa= ge to the oil pump then providing
an appropriate counter bore for an "O" ring.........."M= istral" had =A0elaborate 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 wh= atever oil hose fitting =A0
you choose to use.........I do not ha= ve a photo on this computer of the aluminum block=A0
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 &qu= ot;O" ring............FWIW=A0







<= br>








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