69 Tachometer

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   I'm in need of some help.  The tachometer in my Javelin had a badly faded face, especially the redline marks.  I happened to have a spare metal face in good shape and decided to change it.  I took the cluster face off and removed the tach.  I then took the face plate off, maneuvered it around the tach needle and installed the replacement face.  I reassembled everything, reinstalled the cluster and made sure I had the tach wires installed correctly.  The problem now is the tach reads about 800 to 1,000 RPM low.  At an idle it barely moves and when you rev it up it works but is obviously way off.  The needle is not touching anything and I can't see anything wrong.  Any ideas what I might have done wrong?   Thanks, Jeff

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hffej Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Fan Joined: Sep/19/2007 Location: Massachusetts Status: Offline Points: 27	Post Options Post Reply Quote hffej Report Post Thanks(0) Quote Reply Topic: 69 Tachometer Posted: Apr/01/2012 at 8:55pm
	I'm in need of some help. The tachometer in my Javelin had a badly faded face, especially the redline marks. I happened to have a spare metal face in good shape and decided to change it. I took the cluster face off and removed the tach. I then took the face plate off, maneuvered it around the tach needle and installed the replacement face. I reassembled everything, reinstalled the cluster and made sure I had the tach wires installed correctly. The problem now is the tach reads about 800 to 1,000 RPM low. At an idle it barely moves and when you rev it up it works but is obviously way off. The needle is not touching anything and I can't see anything wrong. Any ideas what I might have done wrong? Thanks, Jeff

amx39068 Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Supporter of TheAMCForum Joined: Feb/21/2008 Location: Arizona Status: Offline Points: 10033	Post Options Post Reply Quote amx39068 Report Post Thanks(0) Quote Reply Posted: Apr/02/2012 at 12:31am
	I am betting the needle got tweaked when removing the old or putting on the new face plate so it probably needs to tweaked in the other direction but be careful you don't break it!
	Dan Curtis, AZ AMC collector quality Restorations, Parts & Engines - amcmusclecars.com

fasttony Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Supporter of TheAMCForum Joined: Jan/09/2011 Location: Southern Maine Status: Offline Points: 534	Post Options Post Reply Quote fasttony Report Post Thanks(0) Quote Reply Posted: Apr/02/2012 at 9:01am
	I am surpised you were able to change the tach face plate without breaking the needle, those are delicate taut wire tachs with strong magnets. Is it possible to have it recalibrated? Tony
	Original Owner BBO Donohue

hffej Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Fan Joined: Sep/19/2007 Location: Massachusetts Status: Offline Points: 27	Post Options Post Reply Quote hffej Report Post Thanks(0) Quote Reply Posted: Apr/03/2012 at 9:12pm
	I'm not sure how I would tweak it, especially since I'm not sure what happened to begin with. It still works but apparently I knocked it out of calibration?