Podcast
Questions and Answers
What is the primary factor influencing most tachometer difficulties?
What is the primary factor influencing most tachometer difficulties?
What is the minimum radius that a bend in the shaft housing should not exceed?
What is the minimum radius that a bend in the shaft housing should not exceed?
When checking a noisy tachometer, which part should be inspected first for potential problems?
When checking a noisy tachometer, which part should be inspected first for potential problems?
What should be done if the tachometer pointer oscillates during operation?
What should be done if the tachometer pointer oscillates during operation?
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What is one type of damage that can affect the proper functioning of a tachometer's cable housing?
What is one type of damage that can affect the proper functioning of a tachometer's cable housing?
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Study Notes
Tachometer Overview
- The tachometer is a mechanical device that indicates engine speed, operating at half the speed of the crankshaft.
- It relies on a flexible shaft for its operation.
Common Issues
- Most problems associated with tachometers originate from the drive-shaft.
- Essential to maintain the shaft housing in optimal condition to ensure proper functioning.
Shaft Housing Specifications
- Shaft housing must be free from kinks, dents, and sharp bends.
- Bends in the shaft should not have a radius shorter than six inches.
- Bends should not occur within three inches of either terminal of the shaft.
Troubleshooting Noisy Tachometers
- A noisy tachometer or an oscillating pointer usually indicates issues with the cable housing.
- Inspect cable housing thoroughly for kinks, sharp bends, and any signs of damage.
Cable Inspection Procedure
- Disconnect the cable at the tachometer for inspection.
- Pull the cable out of the housing to check for wear, spots of breakage, or kinks that may affect performance.
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Description
This quiz covers the mechanical indicators of tachometers, focusing on their functionality and common issues related to the drive-shaft. It highlights the importance of maintaining proper shaft housing to ensure accurate readings and avoid noise or pointer oscillation. Test your knowledge on diagnosing and resolving tachometer problems.
