X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail11.syd.optusnet.com.au ([211.29.132.192] verified) by logan.com (CommuniGate Pro SMTP 5.2.12) with ESMTPS id 3524168 for flyrotary@lancaironline.net; Mon, 02 Mar 2009 17:37:45 -0500 Received-SPF: pass receiver=logan.com; client-ip=211.29.132.192; envelope-from=lendich@optusnet.com.au Received: from ownerf1fc517b8 (d220-236-255-172.dsl.nsw.optusnet.com.au [220.236.255.172]) by mail11.syd.optusnet.com.au (8.13.1/8.13.1) with SMTP id n22Mb3Wo017961 for ; Tue, 3 Mar 2009 09:37:04 +1100 Message-ID: <32351838E5614687900CDF7994A00A75@ownerf1fc517b8> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: No oil pressure Date: Tue, 3 Mar 2009 08:37:04 +1000 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="Windows-1252"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Antivirus: avast! (VPS 0617-3, 04/28/2006), Outbound message X-Antivirus-Status: Clean > Second source support for Lynn's advise: > > http://bdc.cyberosity.com/v/Technical/Front-Cover-Assembly/FrontCoverORingInstalled.Jpg.html > > Note the RH sidebar, indicating that failure of the o-ring will yield > oil pressure in the 0-25# range. > > Dale R . Lynn, If you look at the housing on this web site and the housing photo you provided, it would appear that the housing in your photo is ground down about .5 on the side we are looking at, the pump housing side( not the rotor wear side). I figured that a grind job would automatically cut down the all the surface to the same height, and might affect the pump housing depth - but I suppose it's possible to do the perimeter without touching the pump itself. Either that, or it's a different housing - later perhaps? George (down under)