NEW 12V 55A ALTERNATOR FITS JOHN DEERE TRACTOR 4300 4310 4400 4410 4500 TY25242 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: 45 Amps Fan: Internal Regulator: Internal Grooves: 1 Source: Aftermarket