Wasn't really necessary until charging systems using semi-conducters came into common public use.
Anything SAE says is just a suggestion from one group, anyway, just like National Electrical Code. Nobody has to take any of their suggestions, unless a locality makes it law. I think some people confuse what is legally mandated, versus what some organization "suggests."
Positive ground is still used in new equipment, as well as some postive ground alternators. Especially in some large marine systems, where there are some benefits to using postive ground over negative.
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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