Q For fault finding on diesel engines, could you tell
7th April 1972, Page 45
7th April 1972
Page 45
Page 45, 7th April 1972
— Q For fault finding on diesel engines, could you tell
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me whether a Smiths vacuum gauge would work the same as a manometer and if it is possible, to make a manometer oneself? if it is, how does one go about this?
AA Smiths vacuum gauge does not in
corporate a manometer as part of its mechanism. It does in fact use a Bawden tube, as do most dial clock pressure gauges.
To make one's own manometer is quite straightforward. We would suggest that you use transparent plastic pipe with an internal bore of between 0.25in. and 0.187in. and mount it on a backboard. Fill the tube with water to the indicated level, remembering that a form of dye in the water will make the gauge easier to read.
The size of the gauge should be adequate for diesel-engined vehicles. It reads depressions up to 24in. of water.