X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTP id 5392465 for flyrotary@lancaironline.net; Sat, 11 Feb 2012 18:27:41 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=eanderson@carolina.rr.com Return-Path: X-Authority-Analysis: v=2.0 cv=XsF4yC59 c=1 sm=0 a=g3L/TDsr+eNLfIieSKfGkw==:17 a=CNj55GNJf9YA:10 a=KQ1Wv_bSAAAA:8 a=Ppl37dlQbWK-Seb1Yo0A:9 a=lwieMmjIAMtErhqqCVwA:7 a=wPNLvfGTeEIA:10 a=iKhjpyunHcQA:10 a=AcSaDQtcpv8A:10 a=yMhMjlubAAAA:8 a=Ia-xEzejAAAA:8 a=e0cbooI-MhQcYV-JWJ0A:9 a=K351F-Ex_XmAFjw0r70A:7 a=gKO2Hq4RSVkA:10 a=QSmc0Ec9vTIA:10 a=EzXvWhQp4_cA:10 a=g3L/TDsr+eNLfIieSKfGkw==:117 X-Cloudmark-Score: 0 X-Originating-IP: 174.110.170.10 Received: from [174.110.170.10] ([174.110.170.10:64381] helo=EdPC) by cdptpa-oedge02.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id F3/F8-04325-A49F63F4; Sat, 11 Feb 2012 23:27:07 +0000 Message-ID: <977EB62F0FBB444F8034BE863FD6C550@EdPC> From: "Ed Anderson" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] E-Shaft Lock Bolt HELP! Date: Sat, 11 Feb 2012 18:26:49 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000D_01CCE8EA.B7F108C0" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 This is a multi-part message in MIME format. ------=_NextPart_000_000D_01CCE8EA.B7F108C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Not reverse threaded - normal right hand threads. If there is any play = at all in the arrangement you are using to keep the shaft from turning - = its going to be tough to loosen the bolt. Normally, I have found a = impact wrench will do it on the front bolt - but as I said if you have = any play in holding the pulley or if the pulley has any play on the = shaft (bolts a bit loose), it seems to ... ah hem ... lose its impact = (pun intended). You say you don't' have flywheel - then is there anything you could = clamp the counter weight retaining nut (the big one on the other end of = the engine) into that will prevent it from rotating? =20 I've never tried to remove the front bolt without restraining the = flywheel - but, there must be a way, perhaps one of the other guys can = be of some help. Good luck. Ed From: Gordon Alling=20 Sent: Saturday, February 11, 2012 5:48 PM To: Rotary motors in aircraft=20 Subject: [FlyRotary] E-Shaft Lock Bolt HELP! I am tearing down a 13B (1st 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). =20 Does anyone have a magic trick to get past this hurdle? =20 =20 Is there any reason that holding the pulley boss would prevent the lock = bolt from turning? =20 Any and all suggestions are appreciated. =20 Gordon C. Alling, Jr., PE President acumen Engineering/Analysis, Inc. =20 540-786-2200 www.acumen-ea.com =20 ------=_NextPart_000_000D_01CCE8EA.B7F108C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Not reverse threaded  - normal right hand=20 threads.  If there is any play at all in the arrangement you = are using=20 to keep the shaft from turning - its going to be tough to loosen the = bolt. =20 Normally, I have found a impact wrench will do it on the front bolt - = but as I=20 said if you have any play in holding the pulley or if the pulley has any = play on=20 the shaft (bolts a bit loose), it seems to ... ah hem ... lose its = impact (pun=20 intended).
 
You say you don=92t' have flywheel - then is = there anything=20 you could clamp the counter weight retaining nut (the big one on the = other end=20 of the engine) into that will prevent it from rotating?  =
 
I've never tried to remove the front bolt = without=20 restraining the flywheel - but, there must be a way, perhaps one of the = other=20 guys can be of some help.
 
Good luck.
 
Ed

From: Gordon Alling
Sent: Saturday, February 11, 2012 5:48 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] E-Shaft Lock Bolt = HELP!

I=20 am tearing down a 13B (1st time) and have spent the last few = hours=20 trying to remove the eccentric shaft lock bolt.  Is there some secret to it = that someone=20 can share?  I don=92t have = a flywheel=20 for the engine so I am holding the shaft with a pipe wrench on the = pulley=20 boss.  I have bent the = handle on my=20 3/8 drive ratchet and couldn=92t break it with a 24=94 breaker bar and a = 5=92=20 extension.  I cranked-up = my=20 compressor and couldn=92t do it with my impact wrench.  I tried turning clockwise to = convince=20 myself that it isn=92t reverse threaded.  I would try heating but my = torch won=92t=20 stay lit for some reason (another thing to = fix).

 

Does=20 anyone have a magic trick to get past this hurdle? 

 

Is=20 there any reason that holding the pulley boss would prevent the lock = bolt from=20 turning?

 

Any=20 and all suggestions are appreciated.

 

Gordon=20 C. Alling, Jr., PE

President

acumen = Engineering/Analysis,=20 Inc.

 

540-786-2200

www.acumen-ea.com

 

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