Alternators for Heavy Equipment & Excavators

An alternator is an electrical generator that converts mechanical energy into electrical energy to charge the battery and power the electrical systems of heavy equipment. It's critical for keeping excavators, loaders, and tractors running—without a functioning alternator, the battery will drain and the machine will shut down.

Common signs include dim or flickering lights, a dead battery that keeps needing a jump, warning lights on the dashboard, unusual grinding or whining noises from the engine area, and intermittent electrical failures. If your voltmeter reads below 13.5V while the engine is running, your alternator likely needs replacement.

We carry alternators for all major heavy equipment brands including Caterpillar (CAT), John Deere, Komatsu, Kubota, Case, Hitachi, Volvo, New Holland, Hyundai, Kobelco, Doosan, JCB, and more. Each is cross-referenced against OEM part numbers for guaranteed fitment.

Yes — every alternator sold on Moz Auto Parts comes with a 100% fitment guarantee. If the alternator doesn't fit your machine's make and model, we'll replace it or issue a full refund, no questions asked.

In-stock alternators ship within 24 hours. US domestic delivery takes 2-5 business days. International shipping is available to 120+ countries with delivery in 5-12 business days. Express and next-day options are available at checkout.