X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 30 Oct 2007 17:03:43 -0400 Message-ID: X-Original-Return-Path: Received: from mtai05.charter.net ([209.225.8.185] verified) by logan.com (CommuniGate Pro SMTP 5.2c1) with ESMTP id 2439999 for lml@lancaironline.net; Tue, 30 Oct 2007 11:17:19 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.225.8.185; envelope-from=troneill@charter.net Received: from aarprv06.charter.net ([10.20.200.76]) by mtai05.charter.net (InterMail vM.7.08.02.00 201-2186-121-20061213) with ESMTP id <20071030151637.WRNU7894.mtai05.charter.net@aarprv06.charter.net> for ; Tue, 30 Oct 2007 11:16:37 -0400 Received: from axs ([75.132.198.100]) by aarprv06.charter.net with SMTP id <20071030151636.OEBS14098.aarprv06.charter.net@axs> for ; Tue, 30 Oct 2007 11:16:36 -0400 X-Original-Message-ID: <007401c81b07$dcbddad0$6501a8c0@axs> From: "terrence o'neill" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Re: Gear cylinder hydraulic gaskets X-Original-Date: Tue, 30 Oct 2007 10:16:35 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0071_01C81ADD.F37B5560" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 X-Chzlrs: 0 This is a multi-part message in MIME format. ------=_NextPart_000_0071_01C81ADD.F37B5560 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Mario, Sounds like an excellent idea. Neat, compact linear actuators with = built-in adjustment, available from robotics spinoffs... not expensive.=20 Eliminate much time/labor? Replace the switches, sequencers, limiters, = many-piece-lines, pump, etc., with three actuators and one up-down = switch? Wouldn' be re-inventing the wheel (gear). I heard the 10,000 Bell P-39, = -63, -59s were electric gears. Terrence LNC2 N211AL ----- Original Message -----=20 From: Mario Gonzalez=20 To: lml@lancaironline.net=20 Sent: Tuesday, October 30, 2007 07:27 AM Subject: [LML] Re: Gear cylinder hydraulic gaskets Hello, =20 Just a thought, has anyone on the list researched if with the new = electric motors and batteries available today one could build an = electric gear retract system, maybe like the garage door oppeners kind = of thing technology?.=20 =20 No more leaks here and there get rid of complexity of a = mechanical/hydraulic system, no more pistons, gaskets, pumps etc. =20 Mario LNC2 -------------------------------------------------------------------------= --- To: lml@lancaironline.net Date: Mon, 29 Oct 2007 15:35:01 -0400 From: matt.hapgood@alumni.duke.edu Subject: [LML] Re: Gear cylinder hydraulic gaskets 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=92ve now replaced two entire = cylinders and may need to replace the third=85 =20 I=92m 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.)=20 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=20 -------------------------------------------------------------------------= ----- Windows Live Hotmail and Microsoft Office Outlook =96 together at = last. Get it now! ------=_NextPart_000_0071_01C81ADD.F37B5560 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Mario,
Sounds like an excellent = idea. =20 Neat, compact linear actuators with built-in adjustment, available = from=20 robotics spinoffs... not expensive.
Eliminate much = time/labor? =20 Replace the switches, = sequencers,=20 limiters, many-piece-lines, pump, etc., with three actuators and one = up-down=20 switch?
Wouldn' be re-inventing the = wheel=20 (gear).  I heard the = 10,000=20 Bell P-39, -63, -59s were electric gears.
 
Terrence LNC2 = N211AL
----- Original Message -----
From:=20 Mario=20 Gonzalez
Sent: Tuesday, October 30, 2007 = 07:27=20 AM
Subject: [LML] Re: Gear = cylinder=20 hydraulic gaskets

Hello,
 
Just a thought, has anyone on the = list=20 researched if with the new electric motors and batteries available = today one=20 could build an electric gear retract system, maybe like the garage = door=20 oppeners kind of thing technology?.
 
No more leaks = here and=20 there get rid of complexity of a mechanical/hydraulic system, no more = pistons,=20 gaskets, pumps etc.
 
Mario LNC2

To: lml@lancaironline.net
Date: Mon, 29 Oct 2007 15:35:01 = -0400
From:=20 matt.hapgood@alumni.duke.edu
Subject: [LML] Re: Gear cylinder = hydraulic=20 gaskets

Wonderful. =20 I did the EXACT same thing in May.  Rebuilt all three gear = cylinders=20 due to 1 slight leak.  Result.  Massive hydraulic leak = problems=20 that persist to this day.  I=92ve now replaced two entire = cylinders and=20 may need to replace the third=85 

 

I=92m=20 at a loss, frustrated, and in desperate need of a shop in the = southeast that=20 will help me TROUBLEshoot the problem (as opposed to continually = replacing=20 cylinders).

 

Matt

 

From: = Lancair Mailing=20 List [mailto:lml@lancaironline.net] On Behalf Of kneaded=20 pleasures
Sent: Monday, October 29, 2007 1:59 = PM
To:=20 lml@lancaironline.net
Subject: [LML] Gear cylinder = hydraulic=20 gaskets

 

Matt Reeves wrote back in late = August:

 

"I have a Lancair 320.  I just found a = leak=20 coming out of the end of the left main hydraulic cyl on the high = side. =20 It is not coming out of the fittings, it's actually coming out of = the end=20 where the stop jam is.   It's just a small = leak but I=20 rebuilt this cylinder once already cause I thought there was an = internal=20 leak so my opinion is this is a defective cylinder."

 

Matt:  The problem is probably not with = the=20 cylinder - or your workmanship!  It is probably due to a = wrong=20 piston gasket being included in the cylinder rebuild kit.  = I had=20 an identical problem with one cylinder and chose to rebuild all = three gear=20 cylinders at the same time.  After ordering rebuild kits (just = gaskets=20 in the kits) I installed the new gaskets and two leaked=20 after rebuild.  I removed them and critically reexamined = the=20 supplied materials and my workmanship. (Meanwhile, I reordered = from=20 Lancair two more gasket kits.) I then noted that the=20 newly-supplied leaking gaskets differed from both the very old = rotted=20 gaskets that I had originally removed and also differed from=20 the two newest gaskets that I had just received from Kit=20 Components.  (The gasket that I am targeting here is=20 the gasket that surrounds the piston as it extends/withdraws = from the=20 cylinder.) 

 

The differences in these gaskets are easy = too see and=20 measure.  The new and correct gaskets are the same as the = very-old,=20 original and now rotted gaskets.  They have an O-ring = embedded inside of the plasticized gasket. {I "dis-sected" (the = word is=20 not "di-sected") an old gasket to observe this.}  Writing = on the=20 good/proper/desired gasket is illegible to me.  However, = writing is=20 very clear on the IMPROPER gasket and it reads, "USA  =  .375 =20  MP I     K3E.1".  Further, the=20 good/non-leaking gasket stands noticeably higher on a flat surface - = perhaps=20 four or five mils higher than the poor/leaking gasket (probably = important at=20 2000 psi).

 

Summarizing, don't throw away your leaking = cylinders=20 before you first check to ensure that the correct replacement gasket = is=20 installed.  Look for the tell-tail embedded "O ring" that is=20 prominently visible on the top of the correct=20 gasket.     Greg=20 Nelson 


Windows Live Hotmail and Microsoft Office Outlook =96 together at = last. Get it now! ------=_NextPart_000_0071_01C81ADD.F37B5560--