X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 01 Jan 2013 14:30:23 -0500 Message-ID: X-Original-Return-Path: Received: from elasmtp-banded.atl.sa.earthlink.net ([209.86.89.70] verified) by logan.com (CommuniGate Pro SMTP 6.0) with ESMTP id 5975299 for lml@lancaironline.net; Sun, 30 Dec 2012 14:49:45 -0500 Received-SPF: none receiver=logan.com; client-ip=209.86.89.70; envelope-from=cskelt@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=HAIkgbaww10oXxA3Jtpc7Ce6rC4C7TRAYizOJ9HBit+bPWSmW0OLGjjmgVnycgA3; h=Received:Message-ID:Reply-To:From:To:References:In-Reply-To:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:Importance:X-Mailer:X-MimeOLE:X-ELNK-Trace:X-Originating-IP; Received: from [66.245.90.251] (helo=TheLittleHouse) by elasmtp-banded.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1TpOsf-0002KO-Ac for lml@lancaironline.net; Sun, 30 Dec 2012 14:49:09 -0500 X-Original-Message-ID: Reply-To: "Christopher Skelt" From: "Christopher Skelt" X-Original-To: "Lancair Mailing List" References: In-Reply-To: Subject: LNC2 Hydraulics -- very old pump X-Original-Date: Sun, 30 Dec 2012 13:48:54 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0063_01CDE694.683C1A10" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 15.4.3555.308 X-MimeOLE: Produced By Microsoft MimeOLE V15.4.3555.308 X-ELNK-Trace: df7a2c4e012c7de094f5150ab1c16ac080818c873b4a4d1bd905a7f43af51ad46eea43d53787d26f350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 66.245.90.251 This is a multi-part message in MIME format. ------=_NextPart_000_0063_01CDE694.683C1A10 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Folks, I finally tested gear retraction on my 1990 320 FB. Here's a symptom = that may or may not be normal.=20 1.. Gear Switch in down position. Master Switch off. Dump valve = open.=20 2.. Close the dump valve.=20 3.. Master switch on. Pump runs for a few seconds, pressuring the low = pressure side.=20 4.. Gear switch to up position. Pump runs intermittently, raising the = gear in fits and starts. Eventually gear is up and doors are closed. = Pump stops and remains off=E2=80=94so no evidence of pressure loss. =20 5.. Master switch off. Leave gear switch in up position. Gear stays = up.=20 6.. Open dump valve and gear comes down smoothly and locks.=20 7.. Close dump valve.=20 8.. Master switch on, and gear comes up continuously and steadily.=20 9.. Gear switch to down, and gear comes down steadily.=20 I=E2=80=99m guessing the intermittent operation in 4 results from the = pump competing with back pressure from the low pressure side.=20 The pump is identified as 108AA19-AL-3VT with a date stamp 10/89. = It=E2=80=99s the old model with a cylindrical black metal reservoir. = bought the kit in June 1990. Compare with 108AM19-CLB-3VT cited by = Chris Zavatzson at = http://www.n91cz.com/Hydraulics/Lancair%20Hydraulics.pdf=20 Is intermittent retraction normal without the benefit of the alternator = charging for this variant of pump? Do we know if it is LL, LB, LD, or = some other? =20 The battery is a fully charged Odyssey PC680. The voltage with the pump = operating smoothly (see 8 and 9 above) is 11.3 Volts at 41 Amps = retracting and 31 Amps lowering.=20 I have ordered pressure gauges for the high and low circuits. What = pressure should I look for on the low side while retracting? How much = is too much?=20 Thanks in advance for ideas.=20 Regards, Chris.=20 ------=_NextPart_000_0063_01CDE694.683C1A10 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Folks,
I finally tested gear retraction on my 1990 320 FB.  Here's a = symptom=20 that may or may not be normal.
  1. Gear Switch in down position.  Master Switch off.  Dump = valve=20 open.=20
  2. Close the dump valve.=20
  3. Master switch on.  Pump runs for a few seconds, pressuring = the low=20 pressure side.=20
  4. Gear switch to up position.  Pump runs intermittently, = raising the=20 gear in fits and starts.  Eventually gear is up and doors are=20 closed.  Pump stops and remains off=E2=80=94so no evidence of = pressure=20 loss. =20
  5. Master switch off.  Leave gear switch in up position.  = Gear=20 stays up.=20
  6. Open dump valve and gear comes down smoothly and locks.=20
  7. Close dump valve.=20
  8. Master switch on, and gear comes up continuously and steadily.=20
  9. Gear switch to down, and gear comes down steadily.
I=E2=80=99m guessing the intermittent operation in 4 results from = the pump=20 competing with back pressure from the low pressure side.
 
The pump is identified as 108AA19-AL-3VT with a date stamp = 10/89. =20 It=E2=80=99s the old model with a cylindrical black metal = reservoir.  bought the=20 kit in June 1990.  Compare with 108AM19-CLB-3VT cited by Chris = Zavatzson at=20 http://= www.n91cz.com/Hydraulics/Lancair%20Hydraulics.pdf 
 
Is intermittent retraction normal without the benefit of the = alternator=20 charging for this variant of pump?  Do we know if it is LL, LB, LD, = or some=20 other? 
 
The battery is a fully charged Odyssey PC680.  The voltage = with the=20 pump operating smoothly (see 8 and 9 above) is 11.3 Volts at 41 Amps = retracting=20 and 31 Amps lowering.
 
I have ordered pressure gauges for the high and low circuits.  = What=20 pressure should I look for on the low side while retracting?  How = much is=20 too much?
 
Thanks in advance for ideas.
 
Regards, Chris.
 
 
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