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TOPIC: Broken Speedo Sensor and a fix

Broken Speedo Sensor and a fix 1 month 1 day ago #119456

  • xplorer
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My speedo and Odo stopped functioning so I stripped it to find the fault.





After I made the video, I discovered there never was a spacer under that spiral gear.
Instead, the steel gear simply eroded away the soft aluminium housing at the bottom.
This allowed the spiral gear to drop down over time until it ran out of gear-teeth at the top, which jammed both gears
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Last Edit: 1 month 15 hours ago by xplorer.
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Broken Speedo Sensor and a fix 1 month 1 day ago #119457

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Sorry, battling to come to grips with inserting video and pics...
let me try again....
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Last Edit: 1 month 1 day ago by xplorer.
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Broken Speedo Sensor and a fix 1 month 1 day ago #119458

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First I fitted two s/s washers under the helical driven gear to lift it off the area that got worn away.


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Broken Speedo Sensor and a fix 1 month 1 day ago #119459

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Then I removed the circlip, ground two flat spots, drilled two 1.8mm holes 12mm deep, then hammered in 2mm roll-pins (slotted hollow steel dowels).


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Last Edit: 1 month 1 day ago by xplorer.
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Broken Speedo Sensor and a fix 1 month 1 day ago #119460

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This is how the driving gear and tang fit onto the hub





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Last Edit: 1 month 1 day ago by xplorer.
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Broken Speedo Sensor and a fix 1 month 1 day ago #119461

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I have now done about 1500km with this repair and am expecting it to outlast the original design.
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Broken Speedo Sensor and a fix 1 month 1 day ago #119463

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Awsome. Mine had the same problem after my hub broke Well it was partroblem that i picked up. I also fitted washers, and drilled and tap from bottom, to fit a thrust screw, for play adjustment. My main problem was that the spring that sits inside the seal had rusted/coroded, and came apart, eventually finding its way in between the gears. My fix was a bit different, eliminating the problem of the seal spring. Something to check when maintaining the hub. So in your case, there is still enough room for for the seal to do its work and stop water from entering. Should be, according to the pictures. Well done
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