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 web36906.mail.mud.yahoo.com ([209.191.85.74] verified) by logan.com (CommuniGate Pro SMTP 5.3.10) with SMTP id 4541153 for lml@lancaironline.net; Mon, 25 Oct 2010 11:46:44 -0400 Received-SPF: none receiver=logan.com; client-ip=209.191.85.74; envelope-from=chris_zavatson@yahoo.com Received: (qmail 7493 invoked by uid 60001); 25 Oct 2010 15:46:08 -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=nn8ir5JjzFAYR2osihQRx6mhpiQNYKkRu/sYL751eJcewY4kLK+KacUKWHSuXGTd3P8hlx14qipx0/VIN5YmrQHfrsIXghp9jbYHv3cwJ7klgd81LRoquIdXQS+h1XEi9CS8I5LmRdvKAICFbAcRh2QsJRf78sq/VJBeUeGTxQU=; X-Original-Message-ID: <625541.6057.qm@web36906.mail.mud.yahoo.com> X-YMail-OSG: NbGA14gVM1mJVRKamaVDywzhBzkHLB1IWwJvb9Hu2RQRUTq O8Tli_zCKRLWjcfWeUhUFFh4XOf8cklFhhbAygEViW_cNuw6CdXf_4hsbqHH JCt_fjX1aiSvqxKsIYK4zicKWa4zsUFo7bMIkl6UIwt6xPkJEpbCc56O_0bI ocPwZ.QPsQcOV4YMG0i_Ezkl_ZXhH0ppBoLVFAwDHHumCrF3GoDhl2x_AHvj zd5APgzsBMLsNQdDIMwKKzWQ2dZ9v2iARkq3n4EyKla_k6dYZTacTzSx_H6i DNycRCv5gFg4_JWfKTQBaB70tjAdJ0pUtfaEeIt6q6LPtXtibmMWUGc5Q.Qh lFBC5UL1N Received: from [76.246.62.55] by web36906.mail.mud.yahoo.com via HTTP; Mon, 25 Oct 2010 08:46:08 PDT X-Mailer: YahooMailRC/504.5 YahooMailWebService/0.8.107.284920 References: X-Original-Date: Mon, 25 Oct 2010 08:46:08 -0700 (PDT) From: Chris Zavatson Subject: Re: [LML] Hydraulic hoses X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1043811926-1288021568=:6057" --0-1043811926-1288021568=:6057 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Luke,=0AWhat type hose did you use in your system?=A0 The black deposits co= uld not have =0Acome from the stock hose -=A0different color internally.=A0= All the seals are =0Ablack.=A0 Some fine blackish residue will come from t= he pump gears.=A0 Were the =0Ablack pieces you found a rubber like substanc= e?=0AI too would replace the hose even though the exterior black covering i= s merely =0Aprotections for the structural layers beneath.=0AChris=0A=0AChr= is Zavatson=0AN91CZ=0A360std=0Awww.N91CZ.com=0A=0A=0A=0A=0A________________= ________________=0AFrom: "lalcorn@natca.net" =0ATo: lml@= lancaironline.net=0ASent: Mon, October 25, 2010 6:00:10 AM=0ASubject: [LML]= Hydraulic hoses=0A=0AGeorge, replace your hoses.=A0 If the outside has det= eriorated, then the inside is =0Aas well.=A0 My aircraft also had 15 year o= ld hoses that were falling apart.=A0 I =0Aredid all of the hoses and when I= took the pump apart for an overhaul, I found =0Ablack residue all over the= inside of the pump and resevoir.=A0 I would suggest you =0Acheck your pump= and cylinders as well.=A0 The degrading lines destroyed all of the =0Aseal= s in my gear door cylinders, which I had to rebuild.=A0 The main cylinders = =0Awere already rebuilt a year before, and the seals were still good.=A0 Th= e hoses =0Aare cheap to make.=A0 i am still cleaning out black pieces from = my system.=A0 Even =0Athough the filter on the pump caught alot of it, the = spool valve was still =0Acovered.=A0 I was amazed the gear still worked.=0A= =0ALuke Alcorn=0A=0A=0A --0-1043811926-1288021568=:6057 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Luke,
=0A
What type hose did you use in your system?&nbs= p; The black deposits could not have come from the stock hose - differ= ent color internally.  All the seals are black.  Some fine blacki= sh residue will come from the pump gears.  Were the black pieces you f= ound a rubber like substance?
=0A
I too would replace the hose eve= n though the exterior black covering is merely protections for the structur= al layers beneath.
=0A
Chris
=0A
 
=0A
Chri= s Zavatson
=0A
N91CZ
=0A
360std
=0A=0A

=0A
=0A
=0AFrom: "lalcorn@natca.net" <lalcorn@natca.net>
To: lml@lancaironline.net
<= SPAN style=3D"FONT-WEIGHT: bold">Sent: Mon, October 25, 2010 6:0= 0:10 AM
Subject: [LML] H= ydraulic hoses

George, replace yo= ur hoses.  If the outside has deteriorated, then the inside is as well= .  My aircraft also had 15 year old hoses that were falling apart.&nbs= p; I redid all of the hoses and when I took the pump apart for an overhaul,= I found black residue all over the inside of the pump and resevoir.  = I would suggest you check your pump and cylinders as well.  The degrad= ing lines destroyed all of the seals in my gear door cylinders, which I had= to rebuild.  The main cylinders were already rebuilt a year before, a= nd the seals were still good.  The hoses are cheap to make.  i am still cleaning out black pieces from my syst= em.  Even though the filter on the pump caught alot of it, the spool v= alve was still covered.  I was amazed the gear still worked.

Lu= ke Alcorn


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