David Owen Posted October 20, 2020 Report Share Posted October 20, 2020 9 minutes ago, Andy303 said: David: I have attached some pages extracted from Anthony Rhodes "Repair of Smith -Jaeger Speedometers" as might apply to a tachometer. You can easily find a complete copy on-line. The tachometer works on the same principle as the speedometer, just ignore the bits about the odometer worm drive. The input shaft and the bronze bushing are what needs a bit of grease. I only tried oiling the input shaft from the back - I was afraid that I might ruin a good exchange core if I tried to dismantle the thing. Too much oil is bad as it could coat the magnet and cup which would be bad. interesting article on the chronometric instruments - truly "clocks" and pieces of art. The much simpler, cheaper replacements found on our cars must have saved the car makers a pretty penny. Pages from Smith-jaeger_speedo_repair.pdf 396.5 kB · 1 download Thank you. Quote Link to post Share on other sites
David Owen Posted October 20, 2020 Report Share Posted October 20, 2020 4 hours ago, Lebro said: Is that in response to the article? Quote Link to post Share on other sites
Lebro Posted October 20, 2020 Report Share Posted October 20, 2020 Yes, it was very interesting if complex ! I had often wondered how they worked, now I nearly know Bob. Quote Link to post Share on other sites
David Owen Posted October 20, 2020 Report Share Posted October 20, 2020 12 minutes ago, Lebro said: Yes, it was very interesting if complex ! I had often wondered how they worked, now I nearly know Bob. I am so tempted to try and fix this one. However, I have two that aren't useful to me so I think I will order one from Andy's supplier and see what kind of exchange they will give me for two tachometers. Quote Link to post Share on other sites
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