Boat_SigSince you are checking everything, check the tapered pin that holds the 
sprocket to the pedestal shaft.

Doug Allardyce 
~~~~~_/)~~~~~ 

  -----Original Message-----
  From: CnC-List [mailto:cnc-list-boun...@cnc-list.com]On Behalf Of Jeffrey 
Nelson via CnC-List
  Sent: Wednesday, January 24, 2018 4:21 PM
  To: cnc-list@cnc-list.com
  Cc: Jeffrey Nelson
  Subject: Re: Stus-List Edson wheel chain jumping links?


  Do you know any really good practical jokers?

  I can't imagine a possible way for the chain to jump off the socket and the 
key's unless they somehow broke would prohibit slipping elsewhere.






  On 1/23/2018 9:54 PM, Bruce Whitmore via CnC-List wrote:

    Hello all, 



    OK, I think I have a weird thing going here...


    I have adjusted the wheel to center the turks head knot straight up when 
the wheel is centered.  I got it all nice & straight a few weeks ago, and came 
back to the boat to find it about 20 degrees off to port.  By the way, were 
talking about 20% off on the wheel, not 20% of rudder.   After installing my 
autopilot, I again adjusted it, this time getting the cables set to 
approximately the same amount of adjustment on each side to the adjustment 
bolts through the radial drive wheel.  This required jumping the chain 1 or 2 
notches on the wheel sprocket.


    All was well for a couple weeks, and behold, on Saturday I went back only 
to find the turks head knot about 20 degrees to starboard.  During these 
adjustments, I have made a point to keep the cable deflection adjusted to be 
relatively minimal (say 1/2" or so?), without getting so tight as to reduce the 
feel of the wheel.  I've notice no issues whatsoever when we're out sailing. 



    During the first set of adjustments, I noticed the idler wheel bolts were a 
little loose, and tightened those.  



    Considering the radial wheel bolts connect to each end of the cable, and 
the cables attach to the chain, I can only think the chain is somehow jumping 
on the sprocket.


    Thoughts?

    Bruce Whitmore

    1994 C&C 37/40+, "Astralis"
    Madiera Beach, FL

    (847) 404-5092 (mobile)
    bwhitm...@sbcglobal.net


     

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  -- 
  Cheers,
      Jeff Nelson
      Muir Caileag
      C&C 30
      Armdale Y.C.
      Halifax


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