Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Wed, 22 Dec 2004 12:29:44 -0500 Message-ID: X-Original-Return-Path: Received: from mta-out-1.udlp.com ([207.109.1.8] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 576694 for lml@lancaironline.net; Wed, 22 Dec 2004 10:11:13 -0500 Received-SPF: pass receiver=logan.com; client-ip=207.109.1.8; envelope-from=Christopher.Zavatson@udlp.com Received: from asdmngwia.mpls.udlp.com (asdmngwia.mpls.udlp.com [10.1.62.22]) by mta-out-1.udlp.com (8.12.10/8.12.10) with ESMTP id iBMDBYu2032442 for ; Wed, 22 Dec 2004 07:11:34 -0600 Received: from DM-MN-06-MTA by asdmngwia.mpls.udlp.com with Novell_GroupWise; Wed, 22 Dec 2004 09:10:38 -0600 X-Original-Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 X-Original-Date: Wed, 22 Dec 2004 09:10:22 -0600 From: "Christopher Zavatson" X-Original-To: Subject: [LML] Re: 360 Hydraulic Pump Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Disposition: inline << I had all of the problems with the hydraulics/pump that are being posted recently and over the years. Last August I replaced the original pump (1989 kit) and now everything works like a finely oiled system. Yes, it was expensive ($600.00) and a pain to reconfigure the installation but all the hiccups and headaches are gone.>> George, I am not familiar with the older pumps, in particular on the inside, so I can only speak to what I believe is the current configuration. I assume your old pump had the round cylindrical reservoir as shown in my old building manuals. The two pumps I own were purchased in '95 and around '00 and are identical inside and out. The Oildyne schematic hasn't changed since then so I assume the currently produced pumps are still the same and agree with the schematic. There are factors within each pump that probably influence this locking-up behavior, relief valve settings for example. When I swap pumps between the test bench and plane, these settings have to be changed to compensate for the interaction between the pump, relief valve, pressure switch and one cylinder vs. 6 cylinders with 20 feet of hydraulic line. Given the rarity and apparent randomness of the event, it appears that a number of parameters have to come together for the system to lock. It took several hundred hours for mine to lock-up for the first time. Chris Zavatson