Article: Keep your alternators out of trouble: proper charging depends on spec'ing, maintenance.(infocus: ALTERNATOR TECHNOLOGY)

Today's trucks have more electronics than ever, and they cruise at lower rpms, so more careful alternator spec'ing likely is in order. Fleets should use the appropriately rated alternator for their applications to ensure the longest possible life for the device, says Orlando Braga, Denso's senior engineer.

Most truckmakers have a good handle on actual requirements, says David Stone, heavy-duty executive director for Mitsubishi Electric Automotive America. "Specifications have changed to accommodate the engine system changes as a result of new emissions regulations," Stone says. "Output requirements have increased, and heat tolerance capability has increased."

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