X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 07 Feb 2008 19:43:35 -0500 Message-ID: X-Original-Return-Path: Received: from web36905.mail.mud.yahoo.com ([209.191.85.73] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with SMTP id 2720177 for lml@lancaironline.net; Thu, 07 Feb 2008 18:52:34 -0500 Received: (qmail 22663 invoked by uid 60001); 7 Feb 2008 23:52:33 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type:Message-ID; b=l7jqK/OavgD8hcFOyyMIAH8rWW4VYrV5pmsbN7fNqrWt5uSUi+YsykoCltru0gfVUvWS+NJ5itPueTLHjZf8gyEQATA9dXMBaua4IkhvRzz6OEH+2tKtjpAxzls51lJeU6ISItKoouwCZ6HnirsyGkkBMdXK00VsB+m5ZlIfLFg=; X-YMail-OSG: nY9RRkgVM1kYkI6grPLjQ7vIOsmhiSbkcUlG4pcmUm25xZfhwYmIAmnXfRwCH7wJjU.WJCXFyK9XoCa8LV96mV.8K3fEgF17kbPZzSKob5U1UiU- Received: from [209.225.224.254] by web36905.mail.mud.yahoo.com via HTTP; Thu, 07 Feb 2008 15:52:33 PST X-Mailer: YahooMailRC/818.31 YahooMailWebService/0.7.162 X-Original-Date: Thu, 7 Feb 2008 15:52:33 -0800 (PST) From: Chris Zavatson Subject: Re: [LML] Re: 235/320/360 gear dump valve idea X-Original-To: Lancair Mailing List MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-75601226-1202428353=:21158" X-Original-Message-ID: <609671.21158.qm@web36905.mail.mud.yahoo.com> --0-75601226-1202428353=:21158 Content-Type: text/plain; charset=us-ascii Randy S,, et al <> I have often wondered why this is only occurring in some of our pumps, more likely the older ones. The shuttle valve in current vintage pumps requires significant force to move while the return springs on the poppet valves is very light. Perhaps something as simple as an O-ring change on the shuttle could eliminate the problem altogether with no external plumbing changes needed. Chris Chris Zavatson N91CZ 360std www.N91CZ.com ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ --0-75601226-1202428353=:21158 Content-Type: text/html; charset=us-ascii
Randy S,, et al
<<The problem is that when the pump stops the shuttle valve, in the pump, closes.>>
I have often wondered why this is only occurring in some of our pumps, more likely the older ones.  The shuttle valve in current vintage pumps requires significant force to move while the return springs on the poppet valves is very light.  Perhaps something as simple as an O-ring change on the shuttle could eliminate the problem altogether with no external plumbing changes needed.
Chris
 
 
 
Chris Zavatson
N91CZ
360std


 

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