Return-Path: Received: from out008.verizon.net ([206.46.170.108] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 595126 for flyrotary@lancaironline.net; Fri, 07 Jan 2005 17:31:24 -0500 Received-SPF: pass receiver=logan.com; client-ip=206.46.170.108; envelope-from=rotary.coot@verizon.net Received: from [67.225.117.20] ([65.239.43.6]) by out008.verizon.net (InterMail vM.5.01.06.06 201-253-122-130-106-20030910) with ESMTP id <20050107223051.OBFZ17379.out008.verizon.net@[67.225.117.20]> for ; Fri, 7 Jan 2005 16:30:51 -0600 Mime-Version: 1.0 X-Sender: res0c5l1@incoming.verizon.net Message-Id: In-Reply-To: References: Date: Fri, 7 Jan 2005 14:36:17 -0800 To: "Rotary motors in aircraft" From: Ken Welter Subject: Re: [FlyRotary] Oil Pump Drive Key was Re: [FlyRotary] Re: Some things to check Content-Type: multipart/alternative; boundary="============_-1106985110==_ma============" X-Authentication-Info: Submitted using SMTP AUTH at out008.verizon.net from [65.239.43.6] at Fri, 7 Jan 2005 16:30:49 -0600 --============_-1106985110==_ma============ Content-Type: text/plain; charset="us-ascii" ; format="flowed" Yes I put a center punch mark on each side of the key to make it a jam fit and I put locktite on it and hammer it in and then let it sit for a while before installing it, works great as I have disassembled the engine and reassembled it several times and the key never budges. Ken Welter >Wendell, > >Ed Anderson had a problem where the oil pump Wooodruff key wasn't in >the keyway. The drive was just taken by the friction of the >tensioned nut. Worked for a while. Sooner or later, the sprocket >will slip on the shoulder of the pump shaft. The symptom is >intermittent loss of oil pressure, which gets worse as the sprocket >wears on the shaft shoulder. > >So, as I said in the post below, always make sure that the key is >actually in the keyway before fitting to nut & lockwasher. The key >itself is very tiny, and it requires a bit of juggling to get it in >the keyway in the sprocket. I normally gently stake the keyway in >the shaft so that the key can't slip out. > >Hope this makes sense! > >Leon > --============_-1106985110==_ma============ Content-Type: text/html; charset="us-ascii" Re: [FlyRotary] Oil Pump Drive Key was Re: [FlyRotary] Re:
   Yes I put a center punch mark on each side of the key to make it a jam fit and I put locktite on it and hammer it in and then let it sit for a while before installing it, works great as I have disassembled the engine and reassembled it several times and the key never budges.
  Ken Welter



Wendell,
 
Ed Anderson had a problem where the oil pump Wooodruff key wasn't in the keyway.  The drive was just taken by the friction of the tensioned nut. Worked for a while. Sooner or later,  the sprocket will slip on the shoulder of the pump shaft.  The symptom is intermittent loss of oil pressure,  which gets worse as the sprocket wears on the shaft shoulder.
 
So,  as I said in the post below,  always make sure that the key is actually in the keyway before fitting to nut & lockwasher.  The key itself is very tiny,  and it requires a bit of juggling to get it in the keyway in the sprocket.  I normally gently stake the keyway in the shaft so that the key can't slip out.
 
Hope this makes sense!
 
Leon


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