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Date: Tue, 15 Apr 2008 11:48:17 -0500
From: David Staten <Dastaten@earthlink.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Uh oh, this can't be good - RD-1B PSRU woes
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Tracy..
   when you say endplay, are you talking about ENGINE endplay or endplay 
in the PRSU assembly? On the initial assembly we never felt anything 
during hand rotation of prop that we didnt attribute to normal 
compression forces of a newly rebuilt engine. Gear lash appeared within 
limits and not excessively limited (at the time of assembly a long while 
back)

Dave

Tracy Crook wrote:
> Noticed a couple more clues in the pictures.
>  
>  The input shaft pilot bearing appears to be stuck on the prop shaft 
> pilot.  The overheated snubber (see instructions for part names and 
> locations) and bearing seizure on prop shaft could be due to improper 
> endplay (too little).  Normally not necessary but did you happen to 
> check it during assembly?  Also, did you check the resistance of prop 
> movement in the system lash range after assembly?   There should be 
> very little, almost none.  If the endplay was tight enough to cause 
> this, the resistance should be enought to feel.
>  
> Tracy