X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 29 Oct 2007 15:35:01 -0400 Message-ID: X-Original-Return-Path: Received: from mailrelay.embarq.synacor.com ([208.47.184.3] verified) by logan.com (CommuniGate Pro SMTP 5.2c1) with ESMTP id 2438526 for lml@lancaironline.net; Mon, 29 Oct 2007 14:15:06 -0400 Received-SPF: none receiver=logan.com; client-ip=208.47.184.3; envelope-from=matt.hapgood@alumni.duke.edu X-Original-Return-Path: X_CMAE_Category: 0,0 Undefined,Undefined X-CNFS-Analysis: v=1.0 c=1 a=YKP64Cu90VgTlWHQH9kA:9 a=wpYW5vKvcxDx_CDuVCsA:7 a=Fj_qBrFf6PgJcgcXGtyqAcOsoTcA:4 a=EzXvWhQp4_cA:10 a=GL-Re4spl-cA:10 a=yMhMjlubAAAA:8 a=SSmOFEACAAAA:8 a=N8gxcWirMlIEzxspWQEA:9 a=W-vMbc8ECpExwu2ai-EA:7 a=9bjcCqA6Hpg_hFBYkbrVZE3Cbl4A:4 a=37WNUvjkh6kA:10 X-CM-Score: 0 X-Scanned-by: Cloudmark Authority Engine Authentication-Results: smtp07.embarq.synacor.com smtp.mail=matt.hapgood@alumni.duke.edu; spf=unknown Authentication-Results: smtp07.embarq.synacor.com smtp.user=cch1@embarqmail.com; auth=pass (LOGIN) Authentication-Results: smtp07.embarq.synacor.com x-tls.subject="/C=US/ST=Virginia/L=Charlottesville/O=CCH/CN=mail.hapgoods.com"; auth=fail (cipher=AES256-SHA) Received-SPF: error (smtp07.embarq.synacor.com: 65.40.217.234 is neither permitted nor denied by domain of alumni.duke.edu Received: from [65.40.217.234] ([65.40.217.234:40130] helo=aprilia.hapgoods.com) by mailrelay.embarq.synacor.com (envelope-from ) (ecelerity 2.2.0.18 r(18773)) with ESMTPSA (cipher=AES256-SHA subject="/C=US/ST=Virginia/L=Charlottesville/O=CCH/CN=mail.hapgoods.com") id A4/02-10698-40326274; Mon, 29 Oct 2007 14:14:28 -0400 Received: from Dell690 (Dell690.hapgoods.com [192.168.2.123]) (authenticated bits=0) by aprilia.hapgoods.com (8.13.8/8.13.8) with ESMTP id l9TIEOtB002312 (version=TLSv1/SSLv3 cipher=RC4-MD5 bits=128 verify=NO) for ; Mon, 29 Oct 2007 14:14:26 -0400 From: "Matt Hapgood" X-Original-To: "'Lancair Mailing List'" References: In-Reply-To: Subject: RE: [LML] Gear cylinder hydraulic gaskets X-Original-Date: Mon, 29 Oct 2007 14:14:50 -0400 X-Original-Message-ID: <004301c81a57$99504270$cbf0c750$@hapgood@alumni.duke.edu> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0044_01C81A36.123EA270" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AcgaVVrr/Z2aT8NKTMOA7YQN9uXfxgAAeqQQ Content-Language: en-us This is a multipart message in MIME format. ------=_NextPart_000_0044_01C81A36.123EA270 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Wonderful. I did the EXACT same thing in May. Rebuilt all three gear cylinders due to 1 slight leak. Result. Massive hydraulic leak problems that persist to this day. I've now replaced two entire cylinders and may need to replace the third. I'm at a loss, frustrated, and in desperate need of a shop in the southeast that will help me TROUBLEshoot the problem (as opposed to continually replacing cylinders). Matt From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of kneaded pleasures Sent: Monday, October 29, 2007 1:59 PM To: lml@lancaironline.net Subject: [LML] Gear cylinder hydraulic gaskets Matt Reeves wrote back in late August: "I have a Lancair 320. I just found a leak coming out of the end of the left main hydraulic cyl on the high side. It is not coming out of the fittings, it's actually coming out of the end where the stop jam is. It's just a small leak but I rebuilt this cylinder once already cause I thought there was an internal leak so my opinion is this is a defective cylinder." Matt: The problem is probably not with the cylinder - or your workmanship! It is probably due to a wrong piston gasket being included in the cylinder rebuild kit. I had an identical problem with one cylinder and chose to rebuild all three gear cylinders at the same time. After ordering rebuild kits (just gaskets in the kits) I installed the new gaskets and two leaked after rebuild. I removed them and critically reexamined the supplied materials and my workmanship. (Meanwhile, I reordered from Lancair two more gasket kits.) I then noted that the newly-supplied leaking gaskets differed from both the very old rotted gaskets that I had originally removed and also differed from the two newest gaskets that I had just received from Kit Components. (The gasket that I am targeting here is the gasket that surrounds the piston as it extends/withdraws from the cylinder.) The differences in these gaskets are easy too see and measure. The new and correct gaskets are the same as the very-old, original and now rotted gaskets. They have an O-ring embedded inside of the plasticized gasket. {I "dis-sected" (the word is not "di-sected") an old gasket to observe this.} Writing on the good/proper/desired gasket is illegible to me. However, writing is very clear on the IMPROPER gasket and it reads, "USA .375 MP I K3E.1". Further, the good/non-leaking gasket stands noticeably higher on a flat surface - perhaps four or five mils higher than the poor/leaking gasket (probably important at 2000 psi). Summarizing, don't throw away your leaking cylinders before you first check to ensure that the correct replacement gasket is installed. Look for the tell-tail embedded "O ring" that is prominently visible on the top of the correct gasket. Greg Nelson ------=_NextPart_000_0044_01C81A36.123EA270 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Wonderful.  I did the EXACT same thing in May.  = Rebuilt all three gear cylinders due to 1 slight leak.  Result.  Massive = hydraulic leak problems that persist to this day.  I’ve now replaced two = entire cylinders and may need to replace the third… 

 

I’m at a loss, frustrated, and in desperate need of = a shop in the southeast that will help me TROUBLEshoot the problem (as opposed to continually replacing cylinders).

 

Matt

 

From:= Lancair = Mailing List [mailto:lml@lancaironline.net] On Behalf Of kneaded = pleasures
Sent: Monday, October 29, 2007 1:59 PM
To: lml@lancaironline.net
Subject: [LML] Gear cylinder hydraulic = gaskets

 

Matt Reeves wrote back in late = August:

 

"I have a Lancair 320.  I just found a = leak coming out of the end of the left main hydraulic cyl on the high side.  It = is not coming out of the fittings, it's actually coming out of the end where = the stop jam is.   It's just a small leak but I rebuilt this cylinder once already cause I thought there was an internal leak so my = opinion is this is a defective cylinder."

 

Matt:  The problem is probably not with the = cylinder - or your workmanship!  It is probably due to a wrong piston = gasket being included in the cylinder rebuild kit.  I had an = identical problem with one cylinder and chose to rebuild all three gear cylinders = at the same time.  After ordering rebuild kits (just gaskets in the kits) = I installed the new gaskets and two leaked after rebuild.  I = removed them and critically reexamined the supplied materials and my workmanship. (Meanwhile, I reordered from Lancair two more gasket kits.) I then noted that the newly-supplied leaking gaskets = differed from both the very old rotted gaskets that I had originally removed and also differed from the two newest gaskets that I had just received from Kit Components.  (The gasket that I am = targeting here is the gasket that surrounds the piston as it = extends/withdraws from the cylinder.) 

 

The differences in these gaskets are easy too see = and measure.  The new and correct gaskets are the same as the very-old, original and now rotted gaskets.  They have an O-ring = embedded inside of the plasticized gasket. {I "dis-sected" (the = word is not "di-sected") an old gasket to observe this.}  = Writing on the good/proper/desired gasket is illegible to me.  However, = writing is very clear on the IMPROPER gasket and it reads, "USA   .375   MP I    =  K3E.1".  Further, the good/non-leaking gasket stands noticeably higher on a flat surface - perhaps four or five mils higher than the poor/leaking gasket (probably important at 2000 psi).

 

Summarizing, don't throw away your leaking = cylinders before you first check to ensure that the correct replacement gasket is installed.  Look for the tell-tail embedded "O ring" that = is prominently visible on the top of the correct = gasket.     Greg Nelson 

------=_NextPart_000_0044_01C81A36.123EA270--