tachometer

[ph5200]

I have an old tach that I would like to restore, Not sure how to get it apart. 

[SpencerB]

Not sure if this is the "official" way, but it worked for me:

I placed two blocks of 2x4s under the two flanges that stick out from the sides (where it bolts to the dash) with the tach upside down.  I then used a broad flat head screwdriver along the edge of the face plate and tapped it with a hammer, alternating side to side.  Face plate came right out.  Reinstalled with the face plate upside down on a thick piece of flat rubber on a lead ingot.  Tapped the rear of the case into place.

[ph5200]

Thanks for the info, I have it apart and it is a mess the glass is not flat their is a curve to it.  Is there some place I can find the glass and faceplate.  Also the needle is not attached to the metal unit.  Do you know how they attach? 

[coreyelliott]

Try here for the glass.  I haven't bought anything but I've seen this link listed before.

https://timesavers.com/search.html?q=Convex&go=Search

Corey

[ph5200]

The needle that moves around the faceplate has seperated from the metal housing located behind the faceplate.  There is a thin, small, short, shaft attached to the needle.  How is this attached to the housing that attaches to the cable out the back of the tach?

[spec4don]

I’m trying to remember the tach glass measurement. This one is 3 27/64

https://www.ebay.com/itm/Chrome-Bezel-Glass-Repair-Kit-for-smiths-Speedo-Tach-BSA-for-85-mm-housing/192621977293?hash=item2cd92a1ecd:g:h0sAAOSwfz9bYZwP

Hope this might help

Don G

[ph5200]

Someone who knows a lot more than me concerning the tach informed me that the needle axle in my tach is broken.  So it looks like I need to replace the whole mechanism.  Are these still available?