The tachometre shows frequency of rotation of a cranked shaft of the engine in turns a minute (rpm). The tachometre can help to choose more economic mode of driving, and also warns that frequency of turns of a cranked shaft of the engine exceeds as much as possible admissible value.
The prevention During movement watch tachometre indications. The arrow showing frequency of rotation of a cranked shaft of the engine, should not enter into a red zone (a zone of excess of as much as possible admissible frequency of rotation) as it can lead to serious breakage of the engine and deprive of the right to car warranty service.
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