X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from vms173019pub.verizon.net ([206.46.173.19] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTP id 5392598 for flyrotary@lancaironline.net; Sat, 11 Feb 2012 21:35:52 -0500 Received-SPF: pass receiver=logan.com; client-ip=206.46.173.19; envelope-from=finn.lassen@verizon.net Received: from [192.168.1.2] ([unknown] [166.248.129.105]) by vms173019.mailsrvcs.net (Sun Java(tm) System Messaging Server 7u2-7.02 32bit (built Apr 16 2009)) with ESMTPA id <0LZ900ATCDUC6B20@vms173019.mailsrvcs.net> for flyrotary@lancaironline.net; Sat, 11 Feb 2012 20:35:06 -0600 (CST) Message-id: <4F372552.5030606@verizon.net> Date: Sat, 11 Feb 2012 21:34:58 -0500 From: Finn Lassen User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.26) Gecko/20120129 Thunderbird/3.1.18 MIME-version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] E-Shaft Lock Bolt HELP! References: In-reply-to: Content-type: multipart/alternative; boundary=------------050902090501000908060007 This is a multi-part message in MIME format. --------------050902090501000908060007 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Note that the small (pulley end) 19mm bolt is secured with locktite. Heating it with a torch would help. As for the big nut, I made a big "wrench" out of 1.5x1.5" angle steel with a 4 foot long "handle". The way I kept the counterweight from rotating was by jamming a piece of wood between it and and edge of the engine housing (not recommened, the housing is cast iron and might break). Finn On 2/11/2012 5:48 PM, Gordon Alling wrote: > > I am tearing down a 13B (1^st time) and have spent the last few hours > trying to remove the eccentric shaft lock bolt.Is there some secret to > it that someone can share?I don't have a flywheel for the engine so I > am holding the shaft with a pipe wrench on the pulley boss.I have bent > the handle on my 3/8 drive ratchet and couldn't break it with a 24" > breaker bar and a 5' extension.I cranked-up my compressor and couldn't > do it with my impact wrench.I tried turning clockwise to convince > myself that it isn't reverse threaded. I would try heating but my > torch won't stay lit for some reason (another thing to fix). > > Does anyone have a magic trick to get past this hurdle? > > Is there any reason that holding the pulley boss would prevent the > lock bolt from turning? > > Any and all suggestions are appreciated. > > Gordon C. Alling, Jr., PE > > President > > *acumen**/Engineering/Analysis, Inc./* > > 540-786-2200 > > www.acumen-ea.com > --------------050902090501000908060007 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Note that the small (pulley end) 19mm bolt is secured with locktite.
Heating it with a torch would help.

As for the big nut, I made a big "wrench" out of 1.5x1.5" angle steel with a 4 foot long "handle".
The way I kept the counterweight from rotating was by jamming a piece of wood between it and and edge of the engine housing (not recommened, the housing is cast iron and might break).

Finn

On 2/11/2012 5:48 PM, Gordon Alling wrote:

I am tearing down a 13B (1^st time) and have spent the last few hours trying to remove the eccentric shaft lock bolt. Is there some secret to it that someone can share? I don’t have a flywheel for the engine so I am holding the shaft with a pipe wrench on the pulley boss. I have bent the handle on my 3/8 drive ratchet and couldn’t break it with a 24” breaker bar and a 5’ extension. I cranked-up my compressor and couldn’t do it with my impact wrench. I tried turning clockwise to convince myself that it isn’t reverse threaded. I would try heating but my torch won’t stay lit for some reason (another thing to fix).

Does anyone have a magic trick to get past this hurdle?

Is there any reason that holding the pulley boss would prevent the lock bolt from turning?

Any and all suggestions are appreciated.

Gordon C. Alling, Jr., PE

President

acumen Engineering/Analysis, Inc.

540-786-2200

www.acumen-ea.com

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