Return-Path: Sender: (Marvin Kaye) To: lml Date: Fri, 06 Jun 2003 09:43:58 -0400 Message-ID: X-Original-Return-Path: Received: from vineyard.net ([204.17.195.90] verified) by logan.com (CommuniGate Pro SMTP 4.1b7) with ESMTP id 2404695 for lml@lancaironline.net; Fri, 06 Jun 2003 00:31:33 -0400 Received: from localhost (loopback [127.0.0.1]) by vineyard.net (Postfix) with ESMTP id A571A91FC4 for ; Fri, 6 Jun 2003 00:31:18 -0400 (EDT) Received: from vineyard.net ([127.0.0.1]) by localhost (king1.vineyard.net [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 08566-06 for ; Fri, 6 Jun 2003 00:31:18 -0400 (EDT) Received: from direct (fsy9.vineyard.net [66.101.65.9]) by vineyard.net (Postfix) with SMTP id 5CD5291E72 for ; Fri, 6 Jun 2003 00:31:17 -0400 (EDT) X-Original-Message-ID: <001001c32be5$4dc272c0$09416542@direct> From: "Ted Stanley" X-Original-To: "Mail List Lancair" Subject: Re: [LML] IO550 Alternator Coupling X-Original-Date: Fri, 6 Jun 2003 00:36:51 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2720.3000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Virus-Scanned: by AMaViS at Vineyard.NET Have a look at the link below. It's a reprint of an article from Light Plane Maintenance (ANY article you read in that rag should be digested with caution). I haven't read the article in full but towards the end they mention that Lord Corp can rebuild your coupling for a LOT less money than a new unit from TCM. If you have a look at the elastomer in the coupling and it's a kind of light brown color it's no good. If it's kind of a red silicone color it should be OK. I got this info from a Lord rep years ago. Bob Young is right about removing and replacing the alternator. I made a quarter inch drive crow foot of sorts out of a 12 point box wrench to do the job. It's the ONLY thing I found that works on the TCM 100 amp alternator. I've seen guys use a punch and a hammer but I won't do it. Installation of the coupling on the alternator is tricky and you should reference TCM service bulletins and their alternator overhaul manual. If you don't have the knowledge, tools, and data don't do it. Holding the coupling while removing the retaining nut can be tough. Don't clamp it in a vice. Put a worm drive hose clamp around it nice and tight then you'll have something to grab on to keep the coupling body from turning while you loosen/tighten the nut. The quickest way to check a coupling on the plane is to run it up to about 1500 rpm or so, watch the ammeter, slowly add load (turn on landing lights, etc.). If you see a sudden drop in charge rate you probably have a bad coupling. http://www.lordcorp.com/news/2001/tcm_gear_driven_alternator_checks.pdf Ted Stanley - A&P-IA