X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 25 Oct 2010 15:09:21 -0400 Message-ID: X-Original-Return-Path: Received: from web36902.mail.mud.yahoo.com ([209.191.85.70] verified) by logan.com (CommuniGate Pro SMTP 5.3.10) with SMTP id 4541130 for lml@lancaironline.net; Mon, 25 Oct 2010 11:34:48 -0400 Received-SPF: none receiver=logan.com; client-ip=209.191.85.70; envelope-from=chris_zavatson@yahoo.com Received: (qmail 79674 invoked by uid 60001); 25 Oct 2010 15:34:12 -0000 DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:X-YMail-OSG:Received:X-Mailer:References:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=z7akkuSNM32mP1RSLRqZLghPYX6v89zQ7l6wKjg7eITOY38nmxN7Jglw4ciepBb3a/pHMBtTbjKU5FogjeNGKKjUY/qZlso+GG199DTGBhSz3QKQI0+ZBZRhbFN2QIXvDDE9E9nzM6+eG1KdSMYcHKJyDoxhDCPbnMMWUbFrUUw=; X-Original-Message-ID: <556542.79662.qm@web36902.mail.mud.yahoo.com> X-YMail-OSG: L.AidgsVM1ljUP3tcSGHWLMomUhZ0UDgJbi6_vUy6e0g8pi QT4ypMW78yGC.1PHL11CQI3N7ogpvuG75cfR9lNxF_tbAkIJgY5PpzGEPqZh OEFjBWVealurPsVkr_T2tPhJ0lOn9jfwBgUBwDbIayqWalzvRe0v2yiKZ2OG UAmdfQNnFX8NGzlyj4E4KGe57uuxFflkJ2xB5iCfobQTSeR05jxfUOVUvoUO JFDAmcmW7RIjdOK3uQpNvnLhDT6yM5eDNxV4qjzQVYaqjtjOxilmTnI6LN3j pvX4k8f8sALjJDTGY0wPrG9pynOIsP0XxisowQ1uDjoXnqkk4mCkvtqBZZ60 GC375c1bKvAo059IkHwREFwX2IFU- Received: from [76.246.62.55] by web36902.mail.mud.yahoo.com via HTTP; Mon, 25 Oct 2010 08:34:12 PDT X-Mailer: YahooMailRC/504.5 YahooMailWebService/0.8.107.284920 References: X-Original-Date: Mon, 25 Oct 2010 08:34:12 -0700 (PDT) From: Chris Zavatson Subject: Re: [LML] Hydraulic Cylinder Rebuild X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-188833510-1288020852=:79662" --0-188833510-1288020852=:79662 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Bill,=0AThat is the trick.=0AOnce apart inspect=A0the shaft very closely fo= r scratches.=A0 If there are any they =0Aneed to be buffed out. =A0If they = remain the weeping will return shortly.=A0 The =0Asame goes for the ID of t= he cylinders bores.=A0 Scratches here will lead to =0Apressure leaking=A0ac= ross the piston seal=A0rather than the external weeping you =0Amentioned.= =A0 Scratched will tend to damage new seals, so it is a good idea to =0Arem= ove them when everything is apart.=0AChris=0A=0AChris Zavatson=0AN91CZ=0A30= std=0Awww.N91CZ.com=0A=0A=0A=0A=0A________________________________=0AFrom: = William Rumburg =0ATo: lml@lancaironline.net=0ASent= : Mon, October 25, 2010 6:00:10 AM=0ASubject: [LML] Hydraulic Cylinder Rebu= ild=0A=0A=0AAfter=A0ten years=A0in service, all three door cylinders and tw= o of the three gear =0Aretract cylinders on my 320 were 'weeping' fluid and= needed rebuilding (Bill =0AHarrellson said that his have been in service t= en years with no sign of leaking =0Aand that mine are leaking=A0because I'm= not flying enough - he's probably right)=0AThe three gear retract cylinder= s are manufactured by=A0Wolstenholme Industries and =0Aneither I nor a coup= le of A&P's=A0could determine how to remove the snap rings at =0Aeach end. = Eventually I saw how. Simply remove the hose fittings at each end and =0Apr= ess the end caps=A0a short distance into the cylinder to expose the snap = =0Arings=A0and they're then easily removed.=0A=0ABill Rumburg=0AN403WR (Son= ic bOOm)=A0=0A=0A=0A --0-188833510-1288020852=:79662 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Bill,
=0A
That is the trick.
=0A
Once apart ins= pect the shaft very closely for scratches.  If there are any they= need to be buffed out.  If they remain the weeping will return shortl= y.  The same goes for the ID of the cylinders bores.  Scratches h= ere will lead to pressure leaking across the piston seal rather t= han the external weeping you mentioned.  Scratched will tend to damage= new seals, so it is a good idea to remove them when everything is apart.=0A
Chris
=0A
 
=0A
Chris Zavatson
=0A<= DIV>N91CZ
=0A
30std
=0A=0A

=0A
=0A
=0AFrom: W= illiam Rumburg <lancair403@verizon.net>
To: lml@lancaironline.net
Sent: Mon, October 25, 2010 6:00:10 AM
Subject: [LML] Hydraulic Cylinder Re= build

=0A=0A=0A
After ten years in service, all three door cylinder= s and two of the three gear retract cylinders on my 320 were 'weeping' flui= d and needed rebuilding (Bill Harrellson said that his have been in service= ten years with no sign of leaking and that mine are leaking because I= 'm not flying enough - he's probably right)
=0A
The three gear retract cylinders are manufact= ured by Wolstenholme Industries and neither I nor a couple of A&P'= s could determine how to remove the snap rings at each end. Eventually= I saw how. Simply remove the hose fittings at each end and press the end c= aps a short distance into the cylinder to expose the snap rings a= nd they're then easily removed.
=0A
 
=0A
Bill Rumburg
=0A
N403WR (Sonic bOOm) 

=0A=0A --0-188833510-1288020852=:79662--