X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 01 Apr 2011 16:27:52 -0400 Message-ID: X-Original-Return-Path: Received: from elasmtp-kukur.atl.sa.earthlink.net ([209.86.89.65] verified) by logan.com (CommuniGate Pro SMTP 5.4c2) with ESMTP id 4929731 for lml@lancaironline.net; Fri, 01 Apr 2011 14:54:16 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.65; envelope-from=douglasbrunner@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=Nojcm1YdDYPX0/+oyxTHfxfGhLKZEeSXsCty2gl62HdRUi9/Ni4rXMbyqmAX9YCa; h=Message-ID:Date:From:Reply-To:To:Subject:Mime-Version:Content-Transfer-Encoding:X-Mailer:Content-Type:X-ELNK-Trace:X-Originating-IP; Received: from [209.86.224.43] (helo=elwamui-norfolk.atl.sa.earthlink.net) by elasmtp-kukur.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1Q5jTZ-0006mc-6a for lml@lancaironline.net; Fri, 01 Apr 2011 14:53:41 -0400 Received: from 71.100.180.128 by webmail.earthlink.net with HTTP; Fri, 1 Apr 2011 14:53:40 -0400 X-Original-Message-ID: <21684325.1301684021175.JavaMail.root@elwamui-norfolk.atl.sa.earthlink.net> X-Original-Date: Fri, 1 Apr 2011 11:53:40 -0700 (GMT-07:00) From: Douglas Brunner Reply-To: Douglas Brunner X-Original-To: Lancair Mailing List Subject: Re: [LML] Re: LNC2 Gear Hydraulics Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Mailer: EarthLink Zoo Mail 1.0 Content-Type: text/html; charset=UTF-8 X-ELNK-Trace: ad85a799c4f5de37c2eb1477c196d22294f5150ab1c16ac02930b881f11d255e6f85fb65ea9b687d09905a61af997321350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 209.86.224.43

I hav= e incorporated what I call a "gear burp" into my checklist as part of the r= unup.

What I do is breifly open and close the hydraulic gear dump valve. = The gear pump will run briefly then shut down.

Prior to doing the "gear burp" regularly, I had a number of instances wh= en my gear would not come up. Since then - none.

D. Brunner

Legacy N241DB - 500 hours

= ;

-----Original Message-----
From: Chris Zavatson
Sent: Apr 1, 2011 7:34 AM
To: lml@lancaironline.n= et
Subject: [LML] Re: LNC2 Gear Hydraulics

Keith,

You should never have to resort to wrenches to get the wheels u= p =E2=80=93and that is not just speaking from a safety perspective.

The following is an extract and renumbered set of slides from a LOBO = maintenance seminar on the 320/360 hydraulic system. Slide 21 shows one possible explanation for your s= ystem=E2=80=99s failure to retract.

http://www.n91cz.com/misc/LancairHydraulics-LML.pdf

Temperature changes will cause pressure to go up and down, but = should only affect the currently operating side of the system. The non-operating side should be zero = and remain zero unless there is some other failure or configuration issue. = If both operating and = non-operating sides are affected by temperature =E2=80=93 investigate.

Note that earlie= r vintage pumps (~235 era) were internally different.

You may also find some of the following of interest:

http://www.n91cz.com/Hydraulics/Lancair_Hydraulics.htm=

Chris Zavatson

N91CZ

360std

www.N91CZ.net

<= BR>

From: Keith Smith <keith= .smith@gmail.com>
To:= lml@lancaironline.net
Sent:= Thu, March 31, 2011 12:24:59 PM