X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [206.46.252.40] (HELO vms040pub.verizon.net) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 1001182 for flyrotary@lancaironline.net; Mon, 13 Jun 2005 22:46:38 -0400 Received: from verizon.net ([71.99.156.151]) by vms040.mailsrvcs.net (Sun Java System Messaging Server 6.2 HotFix 0.04 (built Dec 24 2004)) with ESMTPA id <0II100M2RZPLZRXH@vms040.mailsrvcs.net> for flyrotary@lancaironline.net; Mon, 13 Jun 2005 21:46:34 -0500 (CDT) Date: Mon, 13 Jun 2005 22:46:28 -0400 From: Finn Lassen Subject: Re: [FlyRotary] Ross unit disassembly In-reply-to: To: Rotary motors in aircraft Message-id: <42AE4504.4030103@verizon.net> MIME-version: 1.0 Content-type: multipart/alternative; boundary="Boundary_(ID_gm3Ty9wvMItPu1rVHAnYtQ)" X-Accept-Language: en-us, en References: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax; PROMO) This is a multi-part message in MIME format. --Boundary_(ID_gm3Ty9wvMItPu1rVHAnYtQ) Content-type: text/plain; charset=windows-1252; format=flowed Content-transfer-encoding: 7BIT Odd, never heard of 4 nuts inside - unless an input shaft thrust bearing retrofit. Or is it a 1:2.85 grear ratio - not familiar with those. The permatex between cone and bellhousing can be quite strong. I have used a deadblow hammer to make it give (gently - and make sure doesn't move too far to the side). Another option would be to use a 2x4 as a lever against back of prop flange (against a a short lenght 2x4 against bellhousing rim). The trick is to control movement - you want to just break the bond but not enough to damage gears and bearings by too much movement from side to side. Once the bond is broken lift it straight out! Good luck! Finn Ben Baltrusaitis wrote: > I need to get my Ross redrive apart to check the planetary gear. I > have the whole unit off the engine and the 16 nuts off the cone where > the planetary gear is located, but I can't get it to come apart. > > Do I have to take the four nuts off the back side to get the cone off? > I don't have assembly instructions. I would really appreciate > someone's help! > Thanks! > Ben --Boundary_(ID_gm3Ty9wvMItPu1rVHAnYtQ) Content-type: text/html; charset=windows-1252 Content-transfer-encoding: 8BIT Odd, never heard of 4 nuts inside - unless an input shaft thrust bearing retrofit. Or is it a 1:2.85 grear ratio - not familiar with those.

The permatex between cone and bellhousing can be quite strong. I have used a deadblow hammer to make it give (gently - and make sure doesn't move too far to the side). Another option would be to use a 2x4 as a lever against back of prop flange (against a a short lenght 2x4 against bellhousing rim).
The trick is to control movement - you want to just break the bond but not enough to damage gears and bearings by too much movement from side to side. Once the bond is broken lift it straight out!

Good luck!

Finn

Ben Baltrusaitis wrote:

I need to get my Ross redrive apart to check the planetary gear. I have the whole unit off the engine and the 16 nuts off the cone where the planetary gear is located, but I can't get it to come apart.

Do I have to take the four nuts off the back side to get the cone off?

I don't have assembly instructions. I would really appreciate someone's help!

Thanks!

Ben

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