X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 04 Jul 2007 09:18:16 -0400 Message-ID: X-Original-Return-Path: <5zq@cox.net> Received: from eastrmmtao101.cox.net ([68.230.240.7] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2157697 for lml@lancaironline.net; Wed, 04 Jul 2007 09:01:44 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.240.7; envelope-from=5zq@cox.net Received: from eastrmimpo01.cox.net ([68.1.16.119]) by eastrmmtao101.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20070704130102.XAKJ18703.eastrmmtao101.cox.net@eastrmimpo01.cox.net> for ; Wed, 4 Jul 2007 09:01:02 -0400 Received: from bh1 ([72.192.254.103]) by eastrmimpo01.cox.net with bizsmtp id KR101X00k2EdYPc0000000; Wed, 04 Jul 2007 09:01:01 -0400 X-Original-Message-ID: <000a01c7be3b$6d493290$6501a8c0@bh1> From: "Bill & Sue" <5zq@cox.net> X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] LNC2 hydraulic pump turns on when gear is down at regular intervals??? X-Original-Date: Wed, 4 Jul 2007 09:01:24 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0007_01C7BE19.E613DDF0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 This is a multi-part message in MIME format. ------=_NextPart_000_0007_01C7BE19.E613DDF0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Matt, Why do you think that you don't have an internal leak in a cylinder? I = had a similar problem a few years ago and it turned out to be a very = small scratch in one of the cylinder walls. In the down position, the = seals were over the scratch and allowed a minute leak. In the up = position the seals were over smooth wall and worked perfectly. It = doesn't take much, the smallest leak will cause this problem.=20 My suggestion is to get a bunch of caps and plugs and isolate cylinders = one at a time. You can also cap the lines going to the dump valve to = isolate it. It's an easy (if a little messy) way to find out for sure = where the leak is. Be sure to stock up on paper towels and rags before = beginning this operation :-) Let us know what you find out. Bill Harrelson N5ZQ 320 1,400 hrs N6ZQ IV under construction My hydraulic pump turns on when the gear is down at regular intervals = about every minute and it stays on for about 1 second. It does not do this when the gear is up. =20 I don't think there is an internal leak in the cylinders. I do have the original crappy ball emergency dump valve which I do = suspect. Anyone else have any ideas? Thanks. Matt ------=_NextPart_000_0007_01C7BE19.E613DDF0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi=20 Matt,

Why do you think that you don't have an = internal=20 leak in a cylinder? I had a similar problem a few years ago and it = turned out to=20 be a very small scratch in one of the cylinder walls. In the down = position, the=20 seals were over the scratch and allowed a minute leak. In the up = position the=20 seals were over smooth wall and worked perfectly. It doesn't take much, = the=20 smallest leak will cause this problem.

My suggestion is to get a bunch of caps = and plugs=20 and isolate cylinders one at a time. You can also cap the lines going to = the=20 dump valve to isolate it. It's an easy (if a little messy) way to = find out=20 for sure where the leak is. Be sure to stock up on paper towels and rags = before=20 beginning this operation :-) Let us know what you find = out.

Bill Harrelson

N5ZQ 320 1,400 hrs

N6ZQ IV under = construction

My hydraulic pump turns on when the gear is down at regular = intervals=20 about every minute and it stays on for about 1 second.

It does not do this when the gear is up.

I don't think there is an internal leak in the cylinders.

I do have the original crappy ball emergency dump valve which I = do=20 suspect.

Anyone else have any ideas?

Thanks.

Matt

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