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> Rebuiding Inside-out
bkrantz
post Mar 13 2023, 07:32 PM
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Enough engine (and exhaust) for today.

A whole new task: the speedometer. Both odometers did not work, and the speed reads about 5-6 mph too high.


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bkrantz
post Mar 13 2023, 07:35 PM
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Somebody has had this open before! The retaining ring edge looks a bit rough.


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bkrantz
post Mar 13 2023, 07:36 PM
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I did the usual gentle prying round and round, until the ring came off.


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bkrantz
post Mar 13 2023, 07:37 PM
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I did notice these marks on the dial. Reference marks for calibrating the needle?


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bkrantz
post Mar 13 2023, 07:38 PM
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Remove two screws on the back...


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bkrantz
post Mar 13 2023, 07:39 PM
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And out comes the gauge guts.


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bkrantz
post Mar 13 2023, 07:41 PM
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My odometer had the typical problem: the drive comes into the gear on the left side of the upper (main odometer) shaft.


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bkrantz
post Mar 13 2023, 07:43 PM
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And eventually reaches the pot metal gear on the right end of the number wheels. The metal wheel then drives the ones-digit number wheel, as well as the trip odometer. But the metal gear lost grip on the shaft and does not turn as the shift is driven.


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bkrantz
post Mar 13 2023, 07:45 PM
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For access, I removed the speedometer drive module. Just 2 more screws.


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bkrantz
post Mar 13 2023, 07:47 PM
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Then I removed the secondary shaft and the small gears that drive the number wheels. That shaft was crimped on both ends, so it took some work to reduce the crimp on one end.


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bkrantz
post Mar 13 2023, 07:48 PM
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Secondary shaft and small gears.


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bkrantz
post Mar 13 2023, 07:50 PM
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The main shaft pulled out easy, since the metal gear had no grip.


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bkrantz
post Mar 13 2023, 07:51 PM
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All the main odometer parts.


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bkrantz
post Mar 13 2023, 07:52 PM
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Here's the end of the shaft with marks from spinning in the gear.


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bkrantz
post Mar 13 2023, 07:57 PM
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To make a "permanent" grip and fix, I first used my side-cutters to make some ridges on the end of the shaft.

BTW, I kinda over did the ridges, and had to sand the shaft down a bit to fit through the hole in the side plate.


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bkrantz
post Mar 13 2023, 07:58 PM
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Then I deformed the hole in the metal gear with some gentle punches.


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bkrantz
post Mar 13 2023, 07:59 PM
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Perfect! It took gentle hammer taps to seat the shaft in the metal gear. Now the gear turns with the shaft.


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bkrantz
post Mar 13 2023, 08:01 PM
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Then the secondary shaft the the small gears. I spun the input shaft and everything seems to work.


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bkrantz
post Mar 13 2023, 08:03 PM
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That takes care of the odometer. Next up, the speedometer re-calibration. Does anyone know if the needle is a press fit? I tried to pry gently, and it seems stuck.


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Cairo94507
post Mar 14 2023, 06:53 AM
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Amazing- I believe the needle is a press-fit, if I am recalling my conversation with Hartmut at Palo Alto Speedo correctly. (IMG:style_emoticons/default/beerchug.gif)
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