X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 29 Jan 2013 07:54:33 -0500 Message-ID: X-Original-Return-Path: Received: from nm8.bullet.mail.ne1.yahoo.com ([98.138.90.71] verified) by logan.com (CommuniGate Pro SMTP 6.0.1) with ESMTPS id 6034375 for lml@lancaironline.net; Tue, 29 Jan 2013 02:34:43 -0500 Received-SPF: none receiver=logan.com; client-ip=98.138.90.71; envelope-from=chris_zavatson@yahoo.com Received: from [98.138.226.180] by nm8.bullet.mail.ne1.yahoo.com with NNFMP; 29 Jan 2013 07:34:09 -0000 Received: from [98.138.226.166] by tm15.bullet.mail.ne1.yahoo.com with NNFMP; 29 Jan 2013 07:34:09 -0000 Received: from [127.0.0.1] by omp1067.mail.ne1.yahoo.com with NNFMP; 29 Jan 2013 07:34:09 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 338398.19968.bm@omp1067.mail.ne1.yahoo.com Received: (qmail 89629 invoked by uid 60001); 29 Jan 2013 07:34:09 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=6E+en2Tc9Jkz9NuabLzlYQFLxlDwrnjGlR7XnNvMKHlARZ8w5YBpUeOqhKWUVa6aBKOZ0CGgEGtQwWLiq8NAzmbjNpLe5W45cUCiLyEaGixiAKfsW5DaaA2+wS5sojY2bzjY2Tpoq1zRFEGdp46JQZzgE0KVkmglfeGkYZjMc6Y= ; X-YMail-OSG: IWc55dcVM1ltkSjNJ.Q1MFjr4PrXjHfabS8ISoxkFPxqEjv hzfa8QlbVRf05MuwhlaWtOOiEnnDadFaUeWXxdqA.R_WpKBj_D0neAptf5ES c0bgV_tf4gHMXZaRUQDDMVne91t41DLxOzFASKrHvHzjNHqCGOjL5NHpPoca nRhtHUO5LAi3YnACLOs0LitMd2fMQwobWReCADXkjUPZ1bE.GdxQaIHhisxM cwOpUEiOeqcPuGOxDj0hWB4vDhF2xzKDRQzV6zAMbjHfLpipHzNsrTExI3DZ 25sToWwQkDD87cwT7CmqMkvpKcsg34TyPihuIgnl7Do4UQzOV2PQ8f9ie_ru FvEDzAwVxY9QatsARlauHv8Ev4K1B8JfMe8azrxZez7vDa5I43QYLtkEg9_S 4Wi6.i3Na1lz3aI2p.SAh5J9FIZ_eziKKuCXSUDiaRoD6oYbISaZa_jcfsZy P_v8Y7IFzxEMHVEiL1WRmA5adF2XTTIVrcK0qftv37jPYAirfpldePyZNzvF XPb20Pj2YmLWlrS8PQ1ZBZEhTT4GcVXZmpceR3.PlBkGUI9PgbIJsP4m1bXm x9nOHEy_2pp8_spRW5lYtWgl.7w-- Received: from [76.246.36.168] by web121601.mail.ne1.yahoo.com via HTTP; Mon, 28 Jan 2013 23:34:09 PST X-Rocket-MIMEInfo: 001.001,V29sZmdhbmcsCkkgZG9uJ3QgdW5kZXJzdGFuZCB5b3VyIHJlbHVjdGFuY2UgdG8gZml4wqBhIGtub3duwqBwdW1wIGNvbmZpZ3VyYXRpb24gaXNzdWUgYW5kIGJlIGRvbmUgd2l0aCBpdC7CoCBXaGF0IGNvbmZpZ3VyYXRpb24gaXMgeW91ciBwdW1wPwrCoApDaHJpcyBaYXZhdHNvbgpOOTFDWgozNjBzdGQsIDEsNDAwIGhycwpodHRwOi8vd3d3Lm45MWN6Lm5ldC8KIAoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KIEZyb206IFdvbGZnYW5nIDxXb2xmZ2FuZ0BNaUNvbS5uZXQ.ClRvOiBsbWxAbGEBMAEBAQE- X-Mailer: YahooMailWebService/0.8.131.499 References: X-Original-Message-ID: <1359444849.49805.YahooMailNeo@web121601.mail.ne1.yahoo.com> X-Original-Date: Mon, 28 Jan 2013 23:34:09 -0800 (PST) From: Chris Zavatson Reply-To: Chris Zavatson Subject: Re: [LML] Re: Thermal influence on Hydraulic Pressure X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-1977980688-1536289455-1359444849=:49805" ---1977980688-1536289455-1359444849=:49805 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Wolfgang,=0AI don't understand your reluctance to fix=A0a known=A0pump conf= iguration issue and be done with it.=A0 What configuration is your pump?=0A= =A0=0AChris Zavatson=0AN91CZ=0A360std, 1,400 hrs=0Ahttp://www.n91cz.net/=0A= =0A=0A________________________________=0A From: Wolfgang =0ATo: lml@lancaironline.net =0ASent: Monday, January 28, 2013 9:01 AM= =0ASubject: [LML] Re: Thermal influence on Hydraulic Pressure=0A =0A=0A = =0AUnderstood . . . but a module like mine doesn't =0Acare what version you= r pump is, it just works. =0A=A0 =0AWolfgang =0A=A0 =0A----- Original Messa= ge ----- =0A>From: Chris Zavatson =0A>To: lml@lancaironline.net =0A>Sen= t: Sunday, January 27, 2013 6:59 AM =0A>Subject: Re: [LML] Re: Thermal inf= luence on Hydraulic Pressure =0A>=0A> =0A>Charley, =0A>Lancair started add= ing return springs inside the spool valve for Legacy pumps in about 2005.= =A0 One of the consequences of doing this is what you have observed in the = hangar.=A0 You sort of have a 'get out of jail free' card in that your hy= draulic system has a three-way valve.=A0 It doesn't prevent the lock-up.= =A0 It just gives you a way out.=A0 Folks installing the 'Legacy' pump in = 300 series plane with a two-way valve can get stuck.=A0 Fortunately the sp= rings are easily removed and Parker has been providing the parts free-of-c= harge to reset pumps back to the pre-2005 configuration. =0A>Chris =0A>=A0 = =0A>Chris Zavatson =0A>N91CZ =0A>360std. 1,400 hrs =0A>http://www.n91cz.net= / =0A>=0A> =0A>=0A>________________________________=0A>From: Charles Brown = =0A>To: lml@lancaironline.net =0A>Sent: Friday, Janu= ary 25, 2013 11:07 PM=0A>Subject: [LML] Re: Thermal influence on Hydrauli= c Pressure=0A>=0A>=0A>This has happened to me even at the beginning of a fl= ight, if the temps in the hangar have gone from cold on a previous day, to= warm on flight day. =A0I guess cold temps shrink the fluid and suck more = from the reservoir into the lines, and when it warms, the pressure builds = on both sides of the system, so that the "up" and "down" pressure switches= are both open and the gear won't move until I pop the bleed valve. =0A>= =0A> =0A>Nasty when the gear won't retract just after blasting off into a l= ow overcast. =0A>=0A> =0A>Charley Brown =0A>Legacy #299 =A0200 hr=0A>=0A>O= n Jan 25, 2013, at 7:23 AM, randy snarr wrote: =0A>=0A> =0A>. I dont like = having to open the dump valve but it is necessary once in a while especial= ly when it is cold. The pressures on both sides of the system climb due to= the engine heat and the gear sometimes will not move without dumping the = pressure. =0A>=0A>=0A>=A0 ---1977980688-1536289455-1359444849=:49805 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Wolfgang,
I don't understand your reluctance to fix a known pu= mp configuration issue and be done with it.  What configuration is you= r pump?
 
Chris Zavatson=
N91CZ
360std, 1,400 hrs

From: Wolfgang <Wolfgang@MiCom.net>
To: lml@lancaironline.net Sent: Monday, January 2= 8, 2013 9:01 AM
Subject: [LML] Re: Thermal influence on Hydraulic Pressure
=0A
=0A=0A =0A =0A=0A=0A
=0AUnderstood . . . but a module like mine = doesn't =0Acare what version your pump is, it just works.
=0A 
=0A
Wolfgang
=0A
 
=0A
=0A =
----- Original Message -----
=0A = =0A =0A
Sent: Sunday, January 27, 2013 6:59 =0A AM
=0A
Subject: Re: [LML] Re: Thermal influence =0A on Hydraulic Pressure=0A

=0A
=0A
Charley,
=0A
Lancair st= arted adding return springs inside the spool valve for =0A Legacy pumps in= about 2005.  One of the consequences of doing this is what you have observed in the =0A= hangar.  You sort of have a 'get out of jail free' card in that your= =0A hydraulic system has a three-way valve.  It doesn't prevent the = =0A lock-up.  It just gives you a way out.  Folks installing the= =0A 'Legacy' pump in 300 series plane with a two-way valve can get stuck.=   =0A Fortunately the springs are easily removed and Parker has been = providing the =0A parts free-of-charge to reset pumps back to the pre-2005 co= nfiguration.
=0A
Chris
=0A
=  
=0A
Chris Zavatson
=0A
N91CZ
=0A
360std. 1,400 hrs
=0A http://www.n91cz.net/
=0A

=0A
=0A =0A
=0A
From: Charles Brown =0A= <browncc1@verizon.net>
To:= lml@lancaironline.net
Sent: Friday, January 25, 2013 11:07 =0A PM
Subject: [LML] Re: Thermal =0A influenc= e on Hydraulic Pressure

=0A
= =0A
=0A
This has happened to me even at the beginning of a flig= ht, if the temps =0A in the hangar have gone from cold on a previous day, = to warm on flight day. =0A  I guess cold temps shrink the fluid and s= uck more from the reservoir =0A into the lines, and when it warms, the pre= ssure builds on both sides of the =0A system, so that the "up" and "down" = pressure switches are both open and the =0A gear won't move until I pop th= e bleed valve.
=0A

=0A
Nasty when the gear won't= retract just after blasting off into a low =0A overcast.
=0A
<= br>
=0A
Charley Brown
=0A
Legacy #299  200 hr
=0A
=0A
On Jan 25, 2013, at 7:23 AM, randy snarr wrote:=0A
=0A
=0A

=0A
. =0A I dont like having to open the d= ump =0A valve but it is necessary once in a while especially when it is co= ld. The =0A pressures on both sides of the system climb due to the engine = heat and the =0A gear sometimes will not move without dumping the pressure= .
=0A
=0A
=0A



  =0A
=0A

 
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