Speedo/Odometer questions, Gears, lube, and more |
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Speedo/Odometer questions, Gears, lube, and more |
bbrock |
May 17 2017, 09:55 AM
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#1
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
So I completed the odometer repair following the tech article on the bird. PIA but it seemed to go well enough. But I have a few questions before I button this thing up.
Thanks again for all the great advice from the brain trust. |
timothy_nd28 |
May 17 2017, 10:59 AM
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#2
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Advanced Member Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest |
The plastic worm gear will not break, never seen one yet. I think you are referring to the drive gears on a 911 electric speedos, which are notorious for breaking.
That tech article suggests that you pinch the odometer gear with vice grips, so it grabs better on the axle. If you went this route, I think you will be re-opening the gauge in the future for more repairs. Gluing the gear to the shaft is superior to the other method mentioned. Did you remove the back half spinning magnet assembly? The grease has turned to wax in those bearings, spinning the magnet by hand you would be lucky to get 1/8th of a turn. After rinsing out the old grease and relubing (I use silicone spray), it should spin like those new fidget toys. This will keeps the speedo from making odd noises, ghost jumping in speed, and sparing your speedo cable from snapping. Toward the yellowed odometer gear, I would suggest buying a broken core gauge and using a better looking gear from it. |
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