X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 31 May 2009 14:24:00 -0400 Message-ID: X-Original-Return-Path: Received: from pfepb.post.tele.dk ([195.41.46.236] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3657015 for lml@lancaironline.net; Fri, 29 May 2009 04:18:00 -0400 Received-SPF: none receiver=logan.com; client-ip=195.41.46.236; envelope-from=tj@yacht-pool.dk Received: from TIM (0x5736f596.cpe.ge-0-1-0-1111.hadnqu1.customer.tele.dk [87.54.245.150]) by pfepb.post.tele.dk (Postfix) with SMTP id DC0C5F84015 for ; Fri, 29 May 2009 10:17:23 +0200 (CEST) X-Original-Message-ID: <8D7E25F2E50945158DFB75172D69A46C@TIM> From: =?iso-8859-1?Q?Tim_J=F8rgensen?= X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Engine Crankshaft Expansion Plug X-Original-Date: Fri, 29 May 2009 10:17:30 +0200 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00AC_01C9E046.AC924750" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_00AC_01C9E046.AC924750 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 1) Must the expansion plug be removed if the engine is only going to be = idled at 1000 RPM for one minute and no attempt will be made to cycle = the prop? (In other words, will the prop be damaged if it is not = supplied with oil?)=20 I don=B4t have a clue. I don=B4t think anyone has ever considered this; = usually, if the engine is intended for use with a c/s prop, it would be = prepared accordingly prior to installing the prop. Based on my knowledge = about c/s props the prop will not be damaged, but why fire up the engine = if you cannot test prop operation anyway? - and why install a propeller temporarily if not absolutely necessary? = Installing a propeller is not all that funny and there=B4s always a risk = of damaging the o-ring..... You could, of course, skip the o-ring for temporary installations (I = did).=20 If so, how do I remove it -- short of poking it with a screwdriver and = prying it out? That is pretty much excactly what Lycoming instructs you to do. The = front plug (installed IN FRONT OF THE FRONT CRANK BEARING!) is a thin = little feller that is easily punched with a screwdriver or the like. BE AWARE that, in case a front plug is installed, the engine is prepped = for fixed pitch operation and, thus, will surely have been delivered = without a REAR PLUG. A rear plug has to be installed BEHIND THE FRONT = CRANK BEARING, otherwise the governor oil will simply return to the = crankcase via the hollow crankshaft. The rear plug is significantly heavier than the front plug (don=B4t have = the part # at hand) and must be slipped past the oil supply tube inside = the crank, turned 90 deg. and tapped into place with a suitable tool. If you are unsure about this operation (I was), have a certified = mechanic do this (i did!)=20 2) If I do need to remove the plug to run the engine, can I just put it = back in when I remove the prop? Do I need a new one in order for it to = seal properly? (Obviously, if I poke it out with a screwdriver I'll = need a new plug anyway...) During transportation to and from the paintshop and, really, since i = recieved the OH=B4ed engine, I sealed the crankshaft with a special tool = available at most hardware stores. I don=B4t have the part # at hand, = but they refer to it as "duct tape". It works great, seals well and = provides no obvious sideeffects! Very best regards Tim Jorgensen 360 Gamma (MKIIOBFB) 81% ------=_NextPart_000_00AC_01C9E046.AC924750 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

1) Must the expansion plug be removed if the engine is = only going=20 to be idled at 1000 RPM for one minute and no attempt will be made to = cycle the=20 prop? (In other words, will the prop be damaged if it is not = supplied with=20 oil?)

I don=B4t have a clue. I don=B4t think anyone has ever considered = this;=20 usually, if the engine is intended for use with a c/s prop, it = would be=20 prepared accordingly prior to installing the prop. Based on my knowledge = about=20 c/s props the prop will not be damaged, but why fire up the engine = if you=20 cannot test prop operation anyway?

- and why install a propeller temporarily if not absolutely=20 necessary? Installing a propeller is not all that funny and = there=B4s always=20 a risk of damaging the o-ring.....

You could, of course, skip the o-ring for temporary installations = (I=20 did).

If so, how do I = remove it --=20 short of poking it with a screwdriver and prying it out?

That is pretty much excactly what Lycoming instructs you to do. The = front=20 plug (installed IN FRONT OF THE FRONT CRANK BEARING!) is a thin little = feller=20 that is easily punched with a screwdriver or the like.

BE AWARE that, in case a front plug is installed, the engine is = prepped for=20 fixed pitch operation and, thus, will surely have been = delivered=20 without a REAR PLUG. A rear plug has to be installed BEHIND THE = FRONT CRANK=20 BEARING, otherwise the governor oil will simply return to the crankcase = via the=20 hollow crankshaft.

The rear plug is significantly heavier than the front plug = (don=B4t have=20 the part # at hand) and must be slipped past the oil supply tube inside = the=20 crank, turned 90 deg. and tapped into place with a suitable tool.

If you are unsure about this operation (I was), have a certified = mechanic=20 do this (i did!)

2) If I do need to remove the plug to run the engine, = can I=20 just put it back in when I remove the prop? Do I need a new one in = order=20 for it to seal properly? (Obviously, if I poke it out with a = screwdriver=20 I'll need a new plug anyway...)

During transportation to and from the = paintshop=20 and, really, since i recieved the OH=B4ed engine, I sealed the = crankshaft with a=20 special tool available at most hardware stores. I don=B4t have the part = # at hand,=20 but they refer to it as "duct tape". It works great, seals well and = provides no obvious sideeffects!

Very best regards

Tim Jorgensen

360 Gamma (MKIIOBFB) 81%

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