NEW 24V 15A ALTERNATOR FITS KOMATSU CRAWLER D20 D21 D31 D37 D40 D41 600-821-3850 100% NEW and Made with the Highest Quality Components Available Full One Year Warranty Computer tested for consistent Quality and unsurpassed reliability Alternator - Voltage: 24V Amperage: 15 Amps Regulator: Internal Source: Aftermarket