NEW ALTERNATOR FITS JOHN DEERE POWER UNIT 300 1965-1975 A12NJD454 A12NJD452 10-30 100% NEW and Made with the Highest Quality Components Available Full One Year Warranty Computer tested for consistent Quality and unsurpassed reliability Alternator - Voltage: 12V Amperage: 37 Amps Fan: External Regulator: External Grooves: 1 Source: Aftermarket