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Speedometer stops at ~38mph (but the car keeps going) 200 1993

uid 27's pic
posted by  Art Benstein on  Tue Jun 1 04:46 CST 2021
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last visit: Fri Oct 17 20:10 CST 2014
[RELATED]

In a 740 or 940 this symptom would have an electronic cause, but in a 240's electronic speedometer the limit is mechanical. In previous examples the cause is a tiny bit of steel found its way into the gap in the magnet where the moving coil driving the indicator needle fits. In every case, the cluster or speedometer was previously disassembled on a workbench where metalworking has left filings from sawing, grinding, etc. The meter magnet is powerful, and the movement within it is delicate and precision. https://en.wikipedia.org/wiki/Galvanometer
--
Art Benstein near Baltimore

"A harmonica plays better too, once you learn to keep the slobber out!" -machine man






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