X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 30 Jun 2008 21:04:22 -0400 Message-ID: X-Original-Return-Path: Received: from bay0-omc2-s9.bay0.hotmail.com ([65.54.246.145] verified) by logan.com (CommuniGate Pro SMTP 5.2.4) with ESMTP id 2998378 for lml@lancaironline.net; Mon, 30 Jun 2008 17:04:24 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.54.246.145; envelope-from=gt_phantom@hotmail.com Received: from hotmail.com ([207.46.8.14]) by bay0-omc2-s9.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.3959); Mon, 30 Jun 2008 14:03:46 -0700 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Mon, 30 Jun 2008 14:03:46 -0700 X-Original-Message-ID: Received: from 24.248.74.254 by BAY117-DAV4.phx.gbl with DAV; Mon, 30 Jun 2008 21:03:43 +0000 X-Originating-IP: [24.248.74.254] X-Originating-Email: [gt_phantom@hotmail.com] X-Sender: gt_phantom@hotmail.com From: "GT-Phantom" X-Original-To: "'Lancair Mailing List'" Subject: Question about Hydraulic Pump X-Original-Date: Mon, 30 Jun 2008 17:03:46 -0400 X-Original-Message-ID: <000701c8daf4$c9355490$403a400a@thunderlap> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0008_01C8DAD3.4223B490" X-Mailer: Microsoft Office Outlook 11 Thread-Index: Acja9Mj3FLvfGUVPRUGQxfWDBWwm7Q== X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 X-OriginalArrivalTime: 30 Jun 2008 21:03:46.0187 (UTC) FILETIME=[C9296DB0:01C8DAF4] X-Original-Return-Path: gt_phantom@hotmail.com This is a multi-part message in MIME format. ------=_NextPart_000_0008_01C8DAD3.4223B490 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hi all, I'm a buyer not a builder, and I'm trying to diagnose an intermittant gear problem. I've replaced the old-style pressure switches with the new ones, and it still occurs. Sometimes when I raise the gear handle it works just like it should - the gear motor kicks on and runs quickly and solidly until the last motion stops with a solid "thunk." Other times the motor runs as if against resistance, stops, then cycles every few seconds until the gear eventually retracts completely. When this happens, if I put the gear handle down the gear does not extend - until I momentarily move the "dump" valve to the dump position and back, which immediately causes the pump to run until the gear is down and locked. So, I presume there is a double check-valve system in the pump which is supposed to completely release pressure on the non-working side which is "sticking." Questions: - Are the check valves INSIDE the pump assembly (I think they must be)? - Can they be refurbished, or do I have to buy a new pump? Thanks for your confirmation / tips. Bill ------=_NextPart_000_0008_01C8DAD3.4223B490 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi = all,=20

I'm a = buyer not a=20 builder, and I'm trying to diagnose an intermittant gear=20 problem.

I've = replaced the=20 old-style pressure switches with the new ones, and it still = occurs. =20

Sometimes when I=20 raise the gear handle it works just like it should - the gear motor = kicks on and=20 runs quickly and solidly until the last motion stops with a solid = "thunk." =20 Other times the motor runs as if against resistance, stops, then cycles = every=20 few seconds until the gear eventually retracts completely. When = this=20 happens, if I put the gear handle down the gear does not extend - until = I=20 momentarily move the "dump" valve to the dump position and back, which=20 immediately causes the pump to run until the gear is down and=20 locked.

So, I = presume there=20 is a double check-valve system in the pump which is supposed to = completely=20 release pressure on the non-working side which is=20 "sticking."

Questions:

- Are = the check=20 valves INSIDE the pump assembly (I think they must = be)?

- Can = they be=20 refurbished, or do I have to buy a new pump?

Thanks = for your=20 confirmation / tips.

Bill

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