The speedometer cannot accurately measure distance or speed directly, it "thinks" revolutions of the drive shaft in the gearbox housing and converts them into kilometers. The size of the tires and the gear ratio of the main gear determine how many revolutions the speedometer shaft should make in one kilometer. The appropriate adaptation of the speedometer drive is characterized by the gear ratio "path - number of revolutions".
In the release speedometer until July 1981, the shaft (1) the speedometer is attached to the instrument with a knurled nut. The latest version has plastic fixing brackets (3). Position "2" - sealing sleeves.
Speedometer malfunctions
A trembling speedometer needle usually indicates that the shaft is rotating with a jam.
In a machine that develops high power, the speedometer drive in the gearbox may be worn out.
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